WO2018028038A1 - 基于组播的无线通信方法、终端设备和基站 - Google Patents

基于组播的无线通信方法、终端设备和基站 Download PDF

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Publication number
WO2018028038A1
WO2018028038A1 PCT/CN2016/101257 CN2016101257W WO2018028038A1 WO 2018028038 A1 WO2018028038 A1 WO 2018028038A1 CN 2016101257 W CN2016101257 W CN 2016101257W WO 2018028038 A1 WO2018028038 A1 WO 2018028038A1
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Prior art keywords
mtch
configuration information
dci
terminal device
information
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Ceased
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PCT/CN2016/101257
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English (en)
French (fr)
Inventor
铁晓磊
汲桐
花梦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2019507130A priority Critical patent/JP6732103B2/ja
Priority to KR1020187032630A priority patent/KR102116706B1/ko
Priority to EP16912493.0A priority patent/EP3448069B1/en
Priority to CN201680083634.5A priority patent/CN108781346B/zh
Publication of WO2018028038A1 publication Critical patent/WO2018028038A1/zh
Priority to US16/272,715 priority patent/US11006443B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications, and in particular, to a multicast-based wireless communication method, a terminal device, and a base station.
  • MTC Machine Type Communication
  • M2M Machine To Machine
  • IoT Intent of Things
  • one type of important IoT communication system is a communication system based on an existing cellular architecture, which can be called a Cellular IoT.
  • a very high data transmission rate is generally not required between MTC base station terminal devices, but the MTC requires a large coverage area. Therefore, there may be a large number of terminal devices under one MTC base station, which may cover various types of terminal devices such as smart water or electricity meters, smart communities, monitoring, automobiles, wearable terminal devices, and the like.
  • the terminal equipment of this type has high requirements on power consumption and terminal equipment cost, and thus the capability of the terminal equipment is often limited.
  • Single Cell Point-to-Multipoint is a multicast-based propagation technology.
  • the multicast technology includes two types of logical channels: a single cell multicast control channel (Single Cell Multicast Control Channel (SC-MCCH)) and a single cell multicast traffic channel (Single Cell Multicast Traffic Channel, referred to as "SC-MTCH”. ").
  • SC-MCCH is a control channel for transmitting configuration information required by the terminal device to receive the SC-MTCH (ie, SC-MTCH configuration information), and the SC-MTCH is a data channel for transmitting service data in the multicast.
  • the terminal device For a terminal device with limited capability in the IoT system, when receiving the SC-MTCH sent by the base station, it is often incapable of receiving the SC-MCCH sent by the base station at the same time. Therefore, in the process of receiving the SC-MTCH sent by the base station, the terminal device cannot change the configuration information of the SC-MTCH currently being received, thereby affecting the flexibility of the system.
  • the present application provides a multicast-based wireless communication method, a terminal device, and a base station to improve system flexibility.
  • the first aspect provides a multicast-based wireless communication method, including: receiving, by a terminal device, downlink control information DCI sent by a base station, where the DCI is used to schedule a current multicast service channel MTCH, where the DCI includes indication information, the indication information
  • the configuration information used to indicate the current MTCH changes in the next change period MP or the current MP;
  • the terminal device acquires configuration information of the current MTCH after the change according to the indication information.
  • the terminal device In the process of receiving the MTCH by scheduling the DCI of the current MTCH, the terminal device only needs to detect the search space corresponding to the MTCH of the multicast service that it is receiving, and can directly know from the indication information of the DCI sent in the search space. Whether the configuration information of the current multicast service has changed. Therefore, the terminal does not need to read the additional DCI to determine whether the changed configuration information needs to be re-acquired according to the indication information, so that the terminal device can change the configuration information of the current MTCH in the process of receiving the multicast service, thereby improving the system. Flexibility.
  • the method further includes: acquiring the current MTCH according to the configuration information of the current MTCH after the change is obtained.
  • the configuration information of the MTCH includes configuration information of a PDCCH search space of a physical downlink control channel, where the PDCCH search space is used for sending Schedule the DCI of the MTCH.
  • the indication information is further used to indicate that configuration information of other MTCHs in the current cell is in the next MP Or the current MP has changed.
  • the configuration information of other MTCHs in the current cell may be an MTCH in the current cell other than the current MTCH being received.
  • Other MTCHs may be MTCHs that are not used by the terminal device.
  • the indication information is further used to indicate that the current cell multicast configuration information is generated in the current MP or the next MP. change.
  • the current cell multicast configuration information may include that configuration information of an existing multicast service channel MTCH in the current cell is changed, or a new multicast service channel MTCH is added in the cell, or an existing service channel is deleted. MTCH.
  • the terminal device is configured to perform physical downlink control channel monitoring before receiving the DCI sent by the base station.
  • the search space of the DCI of the current MTCH is scheduled without listening to the search space of the DCI that schedules the MCCH.
  • a second aspect of the present invention provides a multicast-based wireless communication method, including: a base station generates downlink control information DCI, where the DCI is used to schedule a first multicast service channel MTCH, where the DCI includes indication information, and the indication information is used to indicate The configuration information of the first MTCH changes in the next change period MP or the current MP; the base station sends the DCI to the terminal device.
  • DCI downlink control information
  • the solution adds the indication information to the DCI, indicating that the configuration information of the current MTCH is changed, so when the terminal device acquires the current MTCH through the DCI, the terminal device The terminal device does not need to detect the search space corresponding to the MCCH, and obtains the MCCH by using the DCI of the scheduled MCCH sent in the search space to learn that the configuration information of the current MTCH is changed, so that the low capability of the MCCH and the MTCH cannot be simultaneously received. For the terminal device, the terminal device can change the configuration information of the current MTCH in the process of receiving the multicast service, thereby improving the flexibility of the system.
  • the configuration information of the MTCH includes configuration information of a physical downlink control channel PDCCH search space, where the PDCCH search space is used to send a DCI of the scheduling MTCH.
  • the indication information is further used to indicate that configuration information of the second MTCH in the current cell is in the next MP or current The MP has changed.
  • the configuration information of the second MTCH in the current cell may be configuration information of the MTCH in the current cell except the one that currently receives the first MTCH.
  • the indication information is further used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the current cell multicast configuration information may include that configuration information of an existing multicast service channel MTCH in the current cell is changed, or a new multicast service channel MTCH is added in the cell, or an existing service channel is deleted. MTCH.
  • the third aspect provides a multicast-based wireless communication method, including: receiving, by a terminal device, a base station sending indication information, where the indication information is used to indicate that the current cell multicast configuration information is changed in a current change period MP or a next MP.
  • the indication information is included in the downlink control information DCI for scheduling the multicast control channel MCCH, or included in the main information block MIB, or included in the direct indication format DIF for indicating system message change on the paging occasion PO Medium; the terminal device root
  • the current cell multicast configuration information after the change is obtained according to the instruction information.
  • the terminal device does not receive any multicast service, it only needs to detect the search space corresponding to the MCCH, and obtain the indication information included in the DCI for scheduling the MCCH from the search space, or detect the information included in the system main information block MIB.
  • the indication information, or the indication information included in the direct indication format DIF for indicating the system message change on the paging occasion PO the terminal device can learn whether the current cell multicast configuration information changes, and when the current cell is learned by the indication information The multicast configuration information is changed, and then the changed current cell multicast configuration information is re-acquired, so that the terminal device avoids repeatedly obtaining the current cell multicast configuration information when the current cell multicast configuration information is not changed, and reduces the terminal device. Resource overhead to increase system flexibility.
  • the current cell multicast configuration information includes a set of configuration information of at least one multicast service channel MTCH in the current cell, where each MTCH in the set
  • the configuration information includes configuration information of a physical downlink control channel PDCCH search space of each MTCH.
  • the indication information is further used to indicate that the configuration information of the existing MTCH in the current cell is changed, or in the current cell. Add MTCH, or delete existing MTCH in the current cell.
  • the fourth aspect provides a multicast-based wireless communication method, including: generating, by the base station, indication information, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, the indication The information is included in the downlink control information DCI for scheduling the multicast control channel MCCH, or included in the primary information block MIB, or included in a direct indication format DIF for indicating a system message change on the paging occasion PO; The base station sends the indication information to the terminal device.
  • the base station generates indication information, which may be included in the DCI of the scheduled MCCH, or included in the main information block MIB, or included in the direct indication format DIF for indicating system message change on the paging occasion PO.
  • the base station sends the indication information to the terminal device, and the terminal device can learn whether the current cell multicast configuration information changes, and when the indication information is obtained, the current cell multicast configuration information is changed, and then the changed current cell is re-acquired.
  • the multicast configuration information is used to prevent the terminal device from repeatedly obtaining the current cell multicast configuration information when the current cell multicast configuration information is not changed, thereby improving system flexibility.
  • the current cell multicast configuration information includes a set of configuration information of at least one multicast service channel MTCH in the current cell, where
  • the configuration information of each MTCH in the set includes configuration information of a physical downlink control channel PDCCH search space, and the PDCCH search space is used to send a DCI of the scheduling MTCH.
  • the indication information is further used to indicate that the configuration information of the existing MTCH in the current cell is changed, or in the current cell. Add MTCH, or delete existing MTCH in the current cell.
  • a fifth aspect of the present invention provides a multicast-based wireless communication method, including: receiving, by a terminal device, cell multicast configuration information sent by a base station, where the cell multicast configuration information includes a set of configuration information of at least one MTCH in a cell, where The configuration information of each MTCH in the set includes configuration information of a physical downlink control channel PDCCH search space, where the PDCCH search space is used to send a DCI for scheduling the MTCH; and the terminal device acquires an MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the PDCCH search space of the MTCH includes at least one of the following: a maximum number of repeated transmissions Rmax of the downlink physical control channel candidate PDCCH Candidate of the MTCH, the The ratio of the MTCH search space occupied in time, the offset configuration information ⁇ offset .
  • the different MTCHs have different MTCH search spaces.
  • the configuration information of the MTCH further includes: configuration information of the discontinuous reception DRX of the MTCH and/or the MTCH The multicast wireless network temporary identifier G-RNTI corresponding to the session session ID.
  • the cell multicast configuration information is carried in the multicast control channel MCCH or the system information block SIB.
  • the sixth aspect provides a multicast-based wireless communication method, including: generating, by a base station, cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of at least one multicast service channel MTCH in the cell, the set The configuration information of each MTCH includes configuration information of a physical downlink control channel PDCCH search space, where the PDCCH search space is used to send a DCI for scheduling a MTCH; and the base station sends the cell multicast configuration information to a terminal device.
  • the configuration information of the search space of the MTCH includes at least one of the following: a maximum number of repeated transmissions Rmax of the PDCCH Candidate of the downlink physical control channel candidate number of the MTCH, The ratio of the MTCH search space occupied in time, the offset configuration information ⁇ offset .
  • the different MTCHs have different MTCH search spaces.
  • the configuration information of the MTCH further includes: configuration information of the discontinuous reception DRX of the MTCH and/or the MTCH The multicast wireless network temporary identifier G-RNTI corresponding to the session session ID.
  • the cell multicast configuration information is carried in the multicast control channel MCCH or the system information block SIB.
  • a seventh aspect of the present invention provides a multicast-based wireless communication method, including: receiving, by a terminal device, downlink control information DCI sent by a base station in a process of receiving a multicast service channel MTCH or a multicast control channel MCCH, where the DCI is used for Scheduling the MTCH or the MCCH, the DCI includes indication information, where the indication information is used to indicate whether the terminal device has a paging in the preset time-frequency resource; if the terminal device determines that there is no search in the preset time-frequency resource The terminal device does not monitor the search space of the corresponding paging in the preset time-frequency resource, and if the terminal device determines that there is a page in the preset time-frequency resource, and the terminal device is in the preset time-frequency resource When there is at least one paging opportunity, the terminal device listens to the search space corresponding to the paging on the paging opportunity, and stops receiving the MTCH or the MCCH.
  • the solution indicates whether the terminal device has a paging in the preset time-frequency resource by using the indication information included in the DCI of the scheduling MTCH and the MCCH. If there is no paging in the preset time-frequency resource, the terminal device is pre-preferred. It is assumed that the search space of the corresponding paging is not monitored in the time-frequency resource, and the terminal device needs to stop receiving the MCCH or the MTCH at the paging occasion (Paging Occasion, PO) when the terminal device does not have the paging in the preset time-frequency resource. The impact of multicast service transmission.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period, or the DCI scheduling MTCH or MCCH occupation time is used. Time-frequency resources for sending pages.
  • the eighth aspect provides a multicast-based wireless communication method, including: the base station generates downlink control information DCI, where the DCI is used to schedule a multicast service channel MTCH or a multicast control channel MCCH, where the DCI includes indication information, and the indication The information is used to indicate whether the preset time-frequency resource is stored.
  • the base station transmits the DCI to the terminal device.
  • the DCI of the scheduling MTCH and the MCCH generated by the base station includes indication information, where the indication information is used to indicate whether the terminal device has a paging in the preset time-frequency resource, and the terminal device is prevented from being in the preset time-frequency resource.
  • the terminal device needs to stop receiving the MCCH or MTCH at the paging occasion and affect the transmission of the multicast service.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period, or the DCI scheduling MTCH or MCCH occupation time is used. Time-frequency resources for sending pages.
  • a terminal device comprising means for performing the first aspect or any one of the implementations of the first aspect.
  • a base station comprising means for performing the second aspect or any one of the implementations of the second aspect.
  • a terminal device comprising means for performing any one of the third aspect or the third aspect.
  • a base station comprising means for performing any one of the fourth aspect or the fourth aspect.
  • a terminal device comprising means for performing any one of the fifth aspect or the fifth aspect.
  • a base station comprising means for performing any one of the sixth or sixth aspects.
  • a terminal device comprising means for performing any one of the seventh aspect or the seventh aspect.
  • a base station comprising means for performing any one of the eighth or eighth aspects.
  • a terminal device comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the instruction stored by the memory, the execution causes the processor to perform the method of any one of the first aspect or the first aspect.
  • a base station includes: a receiver, a transmitter, and a memory, Processor and bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the instruction stored by the memory, the execution causes the processor to perform the method of any one of the second aspect or the second aspect.
  • a terminal device comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the transmitter transmits a signal, and when the processor executes the memory stored instruction, the execution causes the processor to perform the method of any one of the third aspect or the third aspect.
  • a base station comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the instruction stored by the memory, the execution causes the processor to perform the method of any one of the fourth aspect or the fourth aspect.
  • a terminal device comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the memory stored instruction, the execution causes the processor to perform the method of any one of the fifth or fifth aspects.
  • a base station comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the memory stored instructions, the execution causes the processor to perform the method of any one of the sixth or sixth aspects.
  • a terminal device comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory, and The processor is coupled by the bus system for storing instructions for executing instructions stored in the memory to control a receiver to receive signals and controlling a transmitter to transmit signals, and when the processor performs the memory storage
  • the execution of the instructions causes the processor to perform the method of any one of the seventh or seventh aspects.
  • a base station comprising: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the processor transmits a signal, and when the processor executes the memory stored instruction, the execution causes the processor to perform the method of any one of the eighth or eighth aspects.
  • a twenty-fifth aspect a computer readable medium storing a computer program for execution by a terminal device, the computer program comprising any one of the implementations of the first aspect or the first aspect The instructions in the method.
  • a twenty-sixth aspect a computer readable medium storing a computer program for execution by a base station, the computer program comprising any one of the implementations of the second aspect or the second aspect The instructions of the method.
  • a twenty-seventh aspect a computer readable medium storing a computer program for execution by a terminal device, the computer program comprising any one of the implementations of the third aspect or the third aspect The instructions in the method.
  • a twenty-eighth aspect a computer readable medium storing a computer program for execution by a base station, the computer program comprising any one of the implementations of the fourth aspect or the fourth aspect The instructions of the method.
  • a twenty-ninth aspect a computer readable medium storing a computer program for execution by a terminal device, the computer program comprising any one of the implementations of the fifth aspect or the fifth aspect The instructions in the method.
  • a thirtieth aspect a computer readable medium storing a computer program for execution by a base station, the computer program comprising the implementation of any one of the sixth or sixth aspect Method of instruction.
  • a thirty-first aspect a computer readable medium storing a computer program for execution by a terminal device, the computer program comprising any one of the implementations of the seventh aspect or the seventh aspect The instructions in the method.
  • a thirty-second aspect a computer readable medium storing a computer program for execution by a base station, the computer program comprising any one of the implementations of the eighth aspect or the eighth aspect The instructions of the method.
  • a thirty-third aspect a multicast-based wireless communication system is provided, comprising the terminal device according to the ninth aspect and the base station according to the tenth aspect.
  • a multicast-based wireless communication system comprising the terminal device according to the eleventh aspect and the base station according to the twelfth aspect.
  • a thirty-fifth aspect a multicast-based wireless communication system is provided, comprising the terminal device according to the thirteenth aspect and the base station according to the fourteenth aspect.
  • a multicast-based wireless communication system comprising the terminal device according to the fifteenth aspect and the base station according to the sixteenth aspect.
  • the obtaining or receiving the MTCH may refer to receiving multicast data on the MTCH.
  • the obtaining or receiving the MCCH may be performed by receiving the multicast configuration information on the MCCH, where the multicast configuration information may be a set of all multicast service configuration information in the cell, or may be a certain one in the cell. Configuration information of the multicast service.
  • the foregoing MTCH can correspond to a multicast service.
  • the terminal device is configured to acquire the MTCH in the cell according to the cell multicast configuration information, that is, obtain the multicast data on the MTCH.
  • the embodiment further provides a multicast-based wireless communication method, including: the terminal device receives downlink control information DCI sent by the base station, the DCI is used to schedule a current multicast service channel MTCH, and the DCI includes indication information, The indication information is used to indicate that the configuration information of the current MTCH changes in the indication change period MP; and the terminal device acquires the configuration information of the current MTCH after the change according to the indication information.
  • the configuration information of the MTCH includes configuration information of a physical downlink control channel PDCCH search space, where the PDCCH search space is used to send a DCI of the scheduling MTCH.
  • the indication information is further used to indicate that configuration information of other MTCHs in the current cell of the base station is changed in the indication MP.
  • the method before the receiving, by the terminal device, the DCI sent by the base station, the method further includes: the terminal device listening, on the physical downlink control channel PDCCH, a search space for scheduling the DCI of the current MTCH, without listening to the scheduling.
  • MCCH's DCI search space the terminal device listening, on the physical downlink control channel PDCCH, a search space for scheduling the DCI of the current MTCH, without listening to the scheduling.
  • the embodiment further provides a terminal device, which includes: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the transmitter transmits a signal, and when the processor executes the instruction stored by the memory, the execution causes the processor to execute the instruction of the previous method.
  • the embodiment further provides a multicast-based wireless communication method, including: the base station generates downlink control information DCI, the DCI is used to schedule a first multicast service channel MTCH, and the DCI includes indication information, and the indication information is used by The configuration information indicating that the first MTCH is changed in the indication change period MP; the base station transmitting the DCI to the terminal device.
  • DCI downlink control information
  • the DCI is used to schedule a first multicast service channel MTCH
  • the DCI includes indication information
  • the indication information is used by The configuration information indicating that the first MTCH is changed in the indication change period MP
  • the base station transmitting the DCI to the terminal device.
  • the configuration information of the MTCH includes configuration information of the PDCCH search space of the physical downlink control channel, where the PDCCH search space is used to send a DCI of the scheduling MTCH.
  • the indication information is further used to indicate that configuration information of the second MTCH in the current cell changes in the indication MP.
  • the embodiment further provides a base station including: a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by the bus system, the memory is for storing instructions for executing the instructions stored by the memory to control the receiver to receive signals and control the sending
  • the transmitter transmits a signal, and when the processor executes the instruction stored by the memory, the execution causes the processor to execute the instruction of the previous method.
  • an embodiment of the present invention further provides a computer readable medium storing a computer program for execution by a terminal device, the computer program comprising instructions for executing a previous method.
  • the embodiment further provides a terminal device for multicast-based wireless communication, comprising: a first module, configured to receive downlink control information DCI sent by a base station, where the DCI is used to schedule a current multicast service channel MTCH, the DCI
  • the indication information is used to indicate that the configuration information of the current MTCH changes in the indication change period MP.
  • the second module is configured to acquire configuration information of the changed current MTCH according to the indication information.
  • the configuration information of the MTCH includes configuration information of a physical downlink control channel PDCCH search space, where the PDCCH search space is used to send a DCI of the scheduling MTCH.
  • the indication information is further used to indicate that configuration information of other MTCHs in the current cell of the base station is changed in the indication MP.
  • the third module is further configured to: before receiving the DCI sent by the base station, monitor, on the physical downlink control channel PDCCH, a search space for scheduling the DCI of the current MTCH, without listening to the search space of the DCI that schedules the MCCH. .
  • the embodiment further provides a base station for multicast-based wireless communication, comprising: a first module, configured to generate downlink control information DCI, the DCI is used to schedule a first multicast service channel MTCH, and the DCI includes indication information The indication information is used to indicate that the configuration information of the first MTCH changes in the indication change period MP, and the second module is configured to send the DCI to the terminal device.
  • a base station for multicast-based wireless communication comprising: a first module, configured to generate downlink control information DCI, the DCI is used to schedule a first multicast service channel MTCH, and the DCI includes indication information The indication information is used to indicate that the configuration information of the first MTCH changes in the indication change period MP, and the second module is configured to send the DCI to the terminal device.
  • the configuration information of the MTCH includes configuration information of a PDCCH search space of the physical downlink control channel, where the PDCCH search space is used to send a DCI of a scheduling MTCH.
  • the indication information is further used to indicate that configuration information of the second MTCH in the current cell changes in the indication MP.
  • FIG. 1 is a schematic diagram of a communication system to which an embodiment of the present invention can be applied;
  • FIG. 2 is a schematic diagram of a relationship between a logical channel and a physical channel in an SC-PTM;
  • FIG. 3 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of relationship between logical channel and physical channel scheduling according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 13 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 14 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 15 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • 16 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 17 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 19 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • 20 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • 21 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 22 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 23 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 24 is a schematic diagram of a method for indicating paging by indicating information according to an embodiment of the present invention.
  • 25 is a flowchart of a multicast-based wireless communication method according to an embodiment of the present invention.
  • 26 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 27 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 28 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • 29 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 30 is a diagram showing a multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 31 is a schematic diagram of receiving a multicast service by a terminal device according to an embodiment of the present invention.
  • FIG. 32 is another schematic diagram of a terminal device receiving a multicast service according to an embodiment of the present invention.
  • FIG. 33 illustrates another method of multicast-based wireless communication provided by an embodiment of the present invention.
  • FIG. 34 shows another multicast-based wireless communication method according to an embodiment of the present invention.
  • FIG. 35 shows another multicast-based wireless communication method according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS general packet radio industry General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time-division Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • FIG. 1 shows a communication system 100 to which an embodiment of the present invention is applied.
  • the communication system 100 can include at least one network device 110.
  • Network device 110 may be a device that communicates with terminal device 120, such as a base station or base station controller or the like.
  • Each network device 110 can provide communication coverage for a particular geographic area and can communicate with terminal devices (e.g., UEs) located within the coverage area (cell).
  • terminal devices e.g., UEs
  • the network device 110 may be a base station (Base Transceiver Station, abbreviated as "BTS”) in a GSM system or a Code Division Multiple Access (“CDMA”) system, or may be a base station in a WCDMA system (
  • the NodeB may also be an Evolutionary Node B (“eNB” or “eNodeB”) in the LTE system, or a Cloud Radio Access Network (CRAN).
  • the wireless controller, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, a network side device in a future 5G network, or a future public land mobile network (Public Land Mobile Network, referred to as "PLMN").
  • PLMN Public Land Mobile Network
  • the communication system 100 may be an Internet of Things (IoT) system, and the Cellular IoT (CIoT) system is based on an existing cellular network infrastructure.
  • MTC Machine Type Communication
  • the main business areas of future IoT communications may include smart meter reading, medical detection and monitoring, logistics detection, industrial inspection and monitoring, automotive networking, smart communities, and wearable device communication.
  • the Internet of Things industry built around MTC communication is considered to be the fourth wave of the information industry after the computer, Internet and mobile communication networks, and is the future development direction of the network.
  • the CIoT system has large coverage, high connectivity, low cost and low power consumption for networks and end devices.
  • the wireless communication system 100 also includes a plurality of terminal devices 120 located within the coverage of the network device 110.
  • the terminal device 120 can be mobile or fixed.
  • the terminal device 120 can refer to an access terminal, a user equipment (User Equipment, abbreviated as "UE"), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile terminal, a user terminal, a terminal, and a wireless device.
  • UE User Equipment
  • Pass Letter device User Agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SSIP”) phone, a Wireless Local Loop (WLL) station, and a personal digital processing (Personal Digital) Assistant, referred to as "PDA"), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a future evolving public land mobile A terminal device or the like in a network (Public Land Mobile Network, abbreviated as "PLMN").
  • PLMN Public Land Mobile Network
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, the present invention The embodiment does not limit this.
  • the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like, and the embodiment of the present invention is not limited thereto.
  • network entities such as a network controller, a mobility management entity, and the like, and the embodiment of the present invention is not limited thereto.
  • the base station 110 performs multicast to the terminal device 120 based on a single cell point-to-multipoint (SC-PTM) technology, that is, the base station 110 transmits to the multiple terminal devices 120.
  • SC-PTM single cell point-to-multipoint
  • the same downlink data is sent, the base station 110 configures the terminal device 120 that needs to receive downlink data as a multicast group, and the base station 110 sends downlink data to the multicast group, and each terminal device in the multicast group can receive the downlink. data.
  • the SC-PTM technology includes two logical channels: a Single Cell Multicast Control Channel (SC-MCCH) and a Single Cell Multicast Traffic Channel (Single Cell Multicast Traffic Channel).
  • SC-MCCH Single Cell Multicast Control Channel
  • Single Cell Multicast Traffic Channel Single Cell Multicast Traffic Channel
  • SC-MTCH SC-MTCH
  • the SC-MTCH is a multicast traffic channel for transmitting multicast service data
  • the SC-MCCH is a control channel for transmitting control information necessary for the UE to receive the SC-MTCH.
  • the two logical channels are carried on the physical downlink shared channel (Physical Downlink Shared Channel, referred to as "PDSCH") at the physical layer.
  • PDSCH Physical Downlink Shared Channel
  • the base station When transmitting the multicast service to the terminal device, the base station first sends configuration information of the SC-MCCH carried in the System Information Block (SIB) to the terminal device.
  • SIB System Information Block
  • the SC-MCCH configuration The information may be carried in the SIB20.
  • the configuration information of the SC-MCCH included in the SIB20 may include one or more of the following contents:
  • the transmission subframe of the SC-MCCH indicates that the SC-MCCH is transmitted on which specific subframes in a frame
  • the transmission offset of the SC-MCCH indicates the offset of the transmission frame of the SC-MCCH with respect to the start of the cycle in one change cycle.
  • the terminal device acquires the SC-MCCH according to the received configuration information of the SC-MCCH, and includes the cell multicast configuration information in the SC-MCCH, where the cell multicast configuration information is specifically represented by the SC-MTCH information table, and the cell multicast configuration
  • the information includes a collection of configuration information for at least one SC-MTCH within the cell.
  • the terminal device is configured to acquire the SC-MTCH in the cell according to the cell multicast configuration information, that is, obtain the multicast data on the SC-MTCH.
  • the configuration information of the SC-MTCH may include one or more of the following contents:
  • the session information may include an identifier (ID);
  • G-RNTI Group-Radio Network Temporary Identity
  • DCI Downlink Control Information
  • CRC Cyclic Redundancy Check
  • SC-MTCH scheduling information including information such as reception and sleep of the SC-MTCH
  • the neighbor cell information is used to indicate whether the neighboring cell provides a session of interest to the terminal device.
  • FIG. 2 shows a schematic diagram of a scheduling relationship between a logical channel and a physical channel in the SC-PTM technology.
  • the terminal device Before receiving the SC-MCCH, the terminal device first acquires the SC-MCCH configuration information included in the SIB20, receives the DCI that schedules the SC-MCCH according to the SC-MCCH configuration information, and receives the SC-MCCH according to the DCI of the scheduling SC-MCCH. After obtaining the SC-MCCH, it is confirmed whether the session ID included in the SC-MCCH has a service ID of its own interest. When it is confirmed that the SC-MCCH includes the session ID of interest, the DCI of the scheduled SC-MTCH is started to be received. The SC-MTCH is received according to the DCI of the scheduled SC-MCCH.
  • the PDCCH in the embodiment of the present invention may be a PDCCH in LTE, or a Narrowband Physical Downlink Control Channel (NPDCCH) in the NB-IoT, or a machine physical downlink control information channel in the eMTC. (Machine Physical Downlink Control Channel, referred to as "MPDCCH"), or any combination of the above PDCCHs.
  • NPDCCH Narrowband Physical Downlink Control Channel
  • MPDCCH Machine Physical Downlink Control Channel
  • the description of the embodiment of the present invention is only applicable to the PDCCH or the NPDCCH.
  • the PDCCH, the NPDCCH, or the MPDCCH may be replaced with each other unless otherwise specified.
  • two different common search spaces may be defined for SC-MCCH and SC-MCCH, in scheduling SC-
  • the PDCCHs of the MCCH and the SC-MTCH may use the same PDCCH DCI format, and the DCIs that schedule the SC-MCCH and the SC-MTCH may be transmitted in the CSS of the defined SC-MCCH and the CSS of the SC-MTCH, respectively.
  • FIG. 3 illustrates a multicast-based wireless communication method provided by an embodiment of the present invention.
  • the method may be applied to the communication system described in FIG. 1, but the embodiment of the present invention is not limited thereto.
  • the method includes:
  • the terminal device receives the downlink control information DCI sent by the base station, where the DCI is used to schedule the current multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the current MTCH is in the next change period MP or current. MP changes;
  • the terminal device acquires configuration information of the current MTCH after the change according to the indication information.
  • the terminal device receives the DCI sent by the base station to schedule the current MTCH, and obtains the multicast service data that is carried in the MTCH based on the DCI.
  • the solution of the embodiment of the present invention is added in the DCI.
  • the indication information indicates whether the configuration information of the current MTCH changes. That is, the terminal device does not need to detect the search space of the MCCH or receive the MCCH to know whether the configuration information of the current MTCH changes, thereby determining whether it is necessary to re-acquire the changed information. Configuration information increases the flexibility of the system.
  • the configuration information of the MTCH may include configuration information of a PDCCH search space of the MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the MTCH may further include other information, for example, may include at least one of the following: the configuration information of the DRX of the MTCH, and the G corresponding to the session session ID of the MTCH.
  • the RNTI, the MTCH scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the embodiment of the present invention is applicable to the processing of the multicast service, and the multicast service may be, for example, a multimedia broadcast multicast service (MBMS) and/or a multicast service in the SC-PTM.
  • MBMS multimedia broadcast multicast service
  • SC-MTCH MTCH and SC-MTCH, MCCH and SC-MCCH are interchangeable unless otherwise specified.
  • a terminal device having a simple functional structure for example, a meter reading module on a smart water meter or an electric meter, cannot receive the SC-MCCH at the same time due to limited capacity, and cannot receive the terminal device.
  • Other search spaces such as the SC-MCCH search space).
  • the terminal device can monitor the DCI for scheduling the current SC-MTCH in the corresponding search space according to the configuration information of the already obtained multicast service, and the terminal device according to the scheduling SC-
  • the DCI of the MTCH receives the SC-MTCH sent by the base station.
  • the DCI of the scheduling SC-MTCH may include indication information, where the indication information is used to indicate that configuration information of the current SC-MTCH changes in the next MP or the current MP.
  • the configuration information of the SC-MTCH may include configuration information of a search space for scheduling the SC-MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the SC-MTCH may further include other information, for example, may include at least one of the following information: configuration information of the DRX of the SC-MTCH, the SC-MTCH The G-RNTI corresponding to the session session ID, the SC-MTCH scheduling information, the neighbor cell information, and the like.
  • the terminal device may determine the G-RNTI corresponding to the session ID according to the session session ID of the current multicast service, according to the current multicast service that has been obtained.
  • the DCI may include indication information, where the indication information is used to indicate that the configuration information of the current SC-MTCH changes in the next MP or the current MP.
  • the indication information in the DCI may be an indication field of at least one bit in the DCI, and the indication field may be used to indicate that configuration information of the current SC-MTCH is in the next MP. Or the current MP has changed.
  • the indication field includes 1 bit.
  • the indication information specifically indicates that the configuration information of the current SC-MTCH changes in the next MP or the current MP, or when the indication field value is 1, the indication The information specifically indicates that the configuration information of the current SC-MTCH changes at the current MP or the next MP.
  • the indication field includes 2 bits.
  • the configuration information of the current SC-MTCH may be changed in the next MP or the current MP, and the value of the indication field is “01”.
  • the letter The information indicating that the current SC-MTCH is changed changes in the current MP or the next MP.
  • the indication information in the DCI may be an indication field of at least one bit in the DCI, and the indication field may be used to indicate that configuration information of the current SC-MTCH is in the next MP. Or the current MP has changed.
  • the indication field includes 1 bit.
  • the indication information specifically indicates that the configuration information of the current SC-MTCH changes in the next MP, or when the indication field value is 1, the indication information is specifically indicated.
  • the configuration information of the current SC-MTCH does not change in the next MP or occurs in the current MP.
  • the indication information in the DCI of the current SC-MTCH is used to indicate that the configuration information of the current SC-MTCH is changed in the next MP or the current MP, and the indication information may be carried in the DCI.
  • the DCI of the scheduling SC-MTCH may include 3 bits, and the binary combination of any bit of the 3 bits may indicate that the current SC-MTCH changes in the next MP or the current MP.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated in a manner of implicit or explicit indication, which is not limited by the embodiment of the present invention.
  • FIG. 4 is a schematic diagram of receiving a multicast service by a terminal device according to an embodiment of the present invention.
  • the embodiment of the present invention takes the NB-IoT system as an example, but is also applicable to other communication systems. Therefore, although the embodiment of the present invention uses the NPDSCH and the NPDCCH to describe the physical layer channel, it may also be replaced with the corresponding physical layer channel of the system, such as the PDSCH and the PDCCH.
  • the SC-MTCH carrying the multicast service and the SC-MCCH carrying the multicast service configuration information are sent on the NPDSCH, and the SC-MCCH and the SC-MTCH are scheduled to be transmitted through the DCI carried on the NPDCCH.
  • different search spaces may be defined for SC-MTCH and SC-MCCH, and the DCI formats for scheduling SC-MTCH and SC-MCCH may be different. It can be seen from FIG. 4 that the DCIs of the scheduled SC-MTCH and SC-MCCH are respectively transmitted in the search space of the SC-MTCH and the SC-MCCH. It should be understood that, as a specific implementation manner, the search space of the SC-MTCH and the search space of the SC-MCCH may be configured to coincide.
  • the terminal device may not receive the SC-MCCH carried on the NPDSCH or the SC-MCCH for scheduling the SC-MCCH in the process of receiving the current SC-MTCH or monitoring the DCI of the NPDSCH for the SC-MTCH in the search space of the NPDCCH.
  • the listening schedule in the search space is used to DCI of the NPDSCH carrying the SC-MCCH.
  • the terminal device in the process of receiving the current SC-MTCH, adds indication information to the DCI that is used to carry the NPDSCH of the SC-MTCH, and the indication information may indicate the multicast service corresponding to the current SC-MTCH.
  • the configuration information changes in the next MP or current MP.
  • the terminal device stops receiving the current SC-MTCH in the next MP or the current MP, and is used for scheduling.
  • the DCI of the scheduled SC-MCCH is searched in the search space of the NPDSCH that carries the SC-MCCH, and the SC-MCCH is reacquired according to the DCI, and the configuration information after the multicast service change is obtained according to the SC-MCCH.
  • the indication information may further indicate that the configuration information of the current SC-MTCH has not changed in the next MP or the current MP.
  • the terminal device can continue to listen to the relevant search space and receive the current SC-MTCH according to the configuration information of the current SC-MTCH.
  • the indication information in the DCI of the scheduling current MTCH may also be used to indicate that configuration information of other MTCHs in the current cell changes in the next MP or the current MP. Therefore, the terminal device receiving the current multicast can determine whether to re-read the current cell multicast configuration information according to its implementation, thereby improving system flexibility.
  • the other MTCH may be other MTCHs in the current cell than the current MTCH that the terminal device is receiving.
  • Other MTCHs may be MTCHs that are not used by the terminal device.
  • the terminal device only needs to detect the search space corresponding to the MTCH of the multicast service that it is receiving, and can directly learn the configuration of the current multicast service from the indication information of the DCI sent in the search space. Whether the information has changed or not, it is also known whether the configuration information of other MTCH has changed. Therefore, the terminal device does not need to read the additional DCI to determine whether it is necessary to re-acquire the changed configuration information according to the indication information, thereby improving the flexibility of the system.
  • the terminal device receives the DCI for scheduling the current SC-MTCH sent by the base station in the process of receiving the current multicast service, and the indication information in the DCI may also be used to indicate other SC-MCTH.
  • the configuration information changes in the next MP or the current MP.
  • an indication field of at least one bit may be introduced in the DCI.
  • the indication information indicates that configuration information of other SC-MTCH changes in the next MP or the next MP
  • the value of the indication field is At 0
  • the indication information indicates that the configuration information of the other MTCH has not changed in the current MP or the next MP. Therefore, the terminal device can determine whether it is required according to the indication information. To regain the changed configuration information, the flexibility of the system is increased.
  • the DCI may further include an indication field of 2 bits.
  • the indication information indicates that configuration information of other SC-MCCH is in the next MP or The current change occurs.
  • the indication information indicates that the configuration information of the other SC-MCCH does not change in the current MP or the next MP.
  • the indication information included in the DCI for scheduling the current SC-MTCH may also be indicated by an arbitrary binary combination of 3 bits, for example, using a bit value of 3 bits to indicate "000" to indicate other SC-MCCHs.
  • the configuration information changes on the next MP or the next MP.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated in a manner of implicit or explicit indication, which is not limited by the embodiment of the present invention.
  • the configuration information of other MTCHs in the cell is changed, including: the existing multicast service in the cell (which may be any existing in the cell except the current multicast service of the terminal device).
  • the configuration information of the multicast service changes, new multicast services are added in the cell, or existing multicast services are deleted.
  • the configuration information of the current multicast service and the configuration information of other MTCHs are carried in the SC-MCCH logical channel, which is carried on the NPDSCH and scheduled by the DCI.
  • the DCI can be sent in a preset or pre-configured search space, and CRC masking can be performed by a preset UEID, such as SC-RNTI.
  • the terminal device may monitor the DCI of the scheduled SC-MCCH on the NPDCCH, according to the DCI. Receive the SC-MCCH sent by the base station.
  • the current cell multicast configuration information is included in the SC-MCCH, and the current cell multicast configuration information includes configuration information of at least one SC-MTCH.
  • These SC-MTCHs are multicast services that are being multicast in a cell.
  • the terminal can obtain the current SC-MTCH configuration information and other multicast configuration information of the SC-MTCH being multicasted by re-acquiring the current cell multicast configuration information.
  • the indication information included in the DCI for scheduling the current SC-MTCH is further used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the current cell multicast configuration information is a set or a list of configuration information of the multicast service channel MTCH of at least one of the cells.
  • the configuration information of the MTCH may include at least one of the following: the configuration information of the search space of the MTCH, the configuration information of the DRX of the MTCH, the G-RNTI corresponding to the session session ID of the MTCH, and the MTCH scheduling.
  • the information and the neighboring cell information and the like are not specifically limited in this embodiment of the present invention.
  • the change of the current cell multicast configuration information may include at least one of the following: the configuration information of the existing MTCH of the cell is changed, the MTCH is added in the cell, and the existing MTCH is deleted.
  • the terminal device can learn that the current cell multicast configuration information is generated in the current MP or the next MP by scheduling the indication information in the DCI of the current SC-MTCH in the process of receiving the current SC-MTCH. change.
  • the indication field of at least one bit may be introduced in the DCI that schedules the current SC-MTCH.
  • the indication information indicates that the current cell multicast configuration information changes in the next MP or current; when the indication field value is indicated When the value is 0, the indication information indicates that the current cell multicast configuration information has not changed in the next MP or the current MP, so that the terminal device can determine, according to the indication information, whether the current cell multicast configuration information needs to be re-acquired, and improve System flexibility.
  • the DCI may further include an indication field of 2 bits.
  • the indication information indicates that a new SC-MTCH is added in the current cell
  • the indication is When the value of the field is "11"
  • the indication information indicates that the existing SC-MTCH is deleted in the current cell.
  • the 0th bit in the indication field to indicate whether to add an SC-MTCH
  • the 1st bit to indicate whether to delete an existing SC-MTCH.
  • the bit value of the 0th bit is 1
  • the indication information indicates that the SC-MTCH is added in the current cell
  • the bit value of the first bit is 1
  • the indication information indicates that the existing SC-MTCH is deleted in the current cell.
  • the indication information in the DCI scheduling the current SC-MTCH may also use any binary combination of 3 bits to indicate the addition of the SC-MTCH in the current cell and/or the deletion of the existing SC-MTCH.
  • the above is only a specific implementation manner of the embodiment of the present invention, but the embodiment of the present invention is not limited thereto.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated by means of implicit or explicit indication. This embodiment of the present invention does not limit this.
  • the method further includes:
  • the terminal device monitors, in the physical downlink control channel, a search space for scheduling DCI of the current MTCH, and does not monitor a search space of the DCI that schedules the MCCH.
  • the terminal device before receiving the downlink control information DCI sent by the base station, the terminal device monitors the search space for scheduling the DCI of the current SC-MTCH on the NPDCCH without listening to the DCI of the scheduled SC-MCCH. Search space.
  • the multicast-based wireless communication method of the embodiment of the present invention is described in detail with reference to FIG. 3 to FIG. 5, and the multicast-based wireless communication method according to the embodiment of the present invention is described in detail below with reference to FIG. . It should be understood that the description on the base station side corresponds to the description on the terminal device side, and a similar description can be referred to above.
  • a multicast-based wireless communication method includes:
  • the base station generates downlink control information DCI, where the DCI is used to schedule a first multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the MTCH changes in the next change period MP or the current MP;
  • the base station sends the DCI to the terminal device.
  • the base station adds the indication information to the DCI that schedules the MTCH, and the indication information is used to indicate that the configuration information of the MTCH is changed, so the terminal device only needs to detect the MTCH corresponding to the multicast service that it is receiving. Space, and from the indication information of the DCI sent in the search space, the configuration information of the current multicast service may be directly changed, and the additional DCI may be read to determine whether the change needs to be re-acquired according to the indication information. After the configuration information, the flexibility of the system is improved.
  • the configuration information of the MTCH may include configuration information of a PDCCH search space of the MTCH.
  • the configuration information of the MTCH may further include other information, for example, may include at least one of the following: the configuration information of the DRX of the MTCH, the G-RNTI corresponding to the session session ID of the MTCH, the MTCH scheduling information, and The neighboring cell information and the like are not specifically limited in this embodiment of the present invention.
  • the content of the embodiment of the present invention is mainly applicable to the multicast service, including the Multimedia Broadcast Multicast Service (MBMS) MBMS and the SC-PTM. Therefore, in the embodiment of the present invention, unless otherwise specified. , MTCH and SC-MTCH, Both MCCH and SC-MCCH are interchangeable.
  • MBMS Multimedia Broadcast Multicast Service
  • SC-PTM SC-PTM
  • the base station generates the downlink control information DCI, where the DCI includes the indication information, where the indication information may be specifically used to indicate that the configuration information of the SC-MTCH changes in the next change period MP or the current MP.
  • the indication information may be carried in the at least one bit of the DCI.
  • the indication information included in the DCI for scheduling the SC-MTCH may also be used to indicate that the configuration information of the second SC-MTCH changes in the next MP or the current MP.
  • the indication information may be carried in the at least one bit in the DCI.
  • the second SC-MTCH may be an SC-MTCH other than the first SC-MTCH currently being received in the current cell, for example, may be the first SC-before being received. All SC-MTCHs except MTCH.
  • the indication information in the DCI used for scheduling the SC-MTCH may also be used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the indication information may be carried in the at least one bit in the DCI.
  • the current cell multicast configuration information is a set or list of configuration information of the multicast service channel MTCH included in the cell.
  • the configuration information of the MTCH may include at least one of the following information: configuration information of the search space of the MTCH, configuration information of the DRX of the MTCH, G-RNTI corresponding to the session ID of the MTCH, and the MTCH scheduling information and
  • the neighboring cell information and the like are not specifically limited in this embodiment of the present invention.
  • the change of the current cell multicast configuration information includes at least one of the following: the configuration information of the existing multicast service of the current cell is changed, the new multicast service is added in the cell, or the existing multicast service in the cell is deleted.
  • the multicast-based wireless communication method according to an embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 6, and the terminal device and the base station according to the embodiment of the present invention are described in detail below with reference to FIG. 7 to FIG. Since the apparatus described in FIGS. 7-10 can perform the above method, portions that are not described in detail can be referred to the foregoing method embodiments.
  • the terminal device 30 includes:
  • the receiving module 31 is configured to receive downlink control information (DCI) sent by the base station, where the DCI is used to schedule a current multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the current MTCH is in the next change period. Or the current MP changes;
  • DCI downlink control information
  • the obtaining module 32 is configured to obtain, according to the indication information, configuration information of the current MTCH after the change.
  • the terminal device of the embodiment of the present invention receives the DCI that is sent by the base station to schedule the current MTCH, and obtains the multicast service data that is carried in the MTCH based on the DCI.
  • the solution of the embodiment of the present invention adds the indication information to the DCI. Whether the configuration information of the current MTCH is changed, that is, the terminal device does not need to detect the search space of the MCCH or receive the MCCH to know whether the configuration information of the current MTCH has changed, thereby determining whether it is necessary to re-acquire the changed configuration information, thereby improving the configuration information. System flexibility. .
  • the configuration information of the MTCH may include configuration information of a PDCCH search space of the MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the MTCH may further include other information, for example, may include at least one of the following information: the configuration information of the DRX of the MTCH and the G- corresponding to the session session ID of the MTCH.
  • the RNTI, the MTCH scheduling information, the neighboring cell information, and the like are not specifically limited in this embodiment of the present invention.
  • the DCI may include indication information, where the indication information may be used to indicate that configuration information of the current MTCH changes in the next MP or the current MP.
  • the indication information in the DCI may also be used to indicate that configuration information of other MTCHs changes in the next MP or the current MP. Therefore, the terminal device receiving the current multicast can determine whether to re-acquire the configuration information of the other MTCH according to the implementation thereof, thereby improving the flexibility of the system.
  • the indication information in the DCI may be further used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the terminal device 30 further includes:
  • the monitoring module is configured to monitor the search space for scheduling the DCI of the current MTCH on the physical downlink control channel before receiving the DCI, without listening to the search space of the DCI that schedules the MCCH.
  • the receiving module 31 before receiving the downlink control information DCI sent by the base station, the receiving module 31 monitors on the PDCCH for scheduling the current SC-MTCH.
  • the search space of the DCI without listening to the search space of the DCI that schedules the SC-MCCH.
  • terminal device 30 may correspond to the terminal device in the method embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the terminal device 30 can be implemented in FIGS. 3 and 5.
  • the various steps of each method are not repeated here for brevity.
  • FIG. 8 shows a base station 40 according to an embodiment of the present invention.
  • the base station 40 includes:
  • the processing module 41 is configured to generate downlink control information DCI, where the DCI is used for the first scheduled multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the current MTCH is in the next change period MP or the current MP. changes happened;
  • the sending module 42 is configured to send the DCI to the terminal device.
  • the base station adds the indication information to the DCI that schedules the first MTCH, where the indication information is used to indicate that the configuration information of the first MTCH is changed, so the terminal device only needs to detect the multicast service that it is receiving.
  • the configuration information after the change needs to be re-acquired, which increases the flexibility of the system.
  • the configuration information of the MTCH may include configuration information of a search space for scheduling the MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the MTCH may further include other information, for example, may include at least one of the following information: configuration information of the DRX of the MTCH, G- corresponding to the session session ID of the MTCH.
  • the RNTI, the MTCH scheduling information, the neighboring cell information, and the like are not specifically limited in this embodiment of the present invention.
  • the processing module 41 generates downlink control information DCI, where the DCI includes indication information, where the indication information may be used to indicate that the configuration information of the first MTCH is in the next change period MP or the current MP. changes happened.
  • the indication information may be carried in at least one bit in the DCI.
  • the terminal device For the sake of brevity of the application file, details are not described herein again.
  • the indication information in the DCI of the scheduling MTCH generated by the processing module 41 may further be used to indicate that the configuration information of the second MTCH changes in the next MP or the current MP.
  • the indication information in the DCI of the scheduling MTCH generated by the processing module 41 is further used to indicate that the current cell multicast configuration information is changed.
  • the base station 40 may correspond to the method in the embodiment of the present invention.
  • the network device, and the above-described and other operations and/or functions of the various modules in the base station 40, can implement the various steps of the method of FIG. 6. For brevity, no further details are provided herein.
  • FIG. 9 shows a terminal device 50 according to an embodiment of the present invention.
  • the terminal device 50 includes a processor 51, a transmitter 52, a receiver 53, a memory 54, and a bus system 55.
  • the processor 51, the transmitter 52, the receiver 53 and the memory 54 are connected by a bus system 55 for storing instructions for executing instructions stored in the memory 54 to control the transmitter 52.
  • a signal is sent and the receiver 53 is controlled to receive the signal.
  • the receiver 53 is configured to receive the downlink control information DCI sent by the base station, where the DCI is used to schedule the current multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the current MTCH is in the next change period. MP or current MP changes;
  • the processor 51 is configured to acquire configuration information of the current MTCH after the change according to the indication information received by the receiver 53.
  • the processor 51 is further configured to monitor, in the physical downlink control channel, the search space for scheduling the DCI of the current MTCH, before the receiver 53 receives the DCI, without listening to the scheduling.
  • MCCH's DCI search space is further configured to monitor, in the physical downlink control channel, the search space for scheduling the DCI of the current MTCH, before the receiver 53 receives the DCI, without listening to the scheduling.
  • memory 54 may include read only memory and random access memory and provide instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 530 can be configured to execute instructions stored in a memory, and when the processor executes instructions stored in the memory, the processor is operative to perform various steps and/or processes of the method embodiments described above.
  • FIG. 10 shows a base station 60 according to an embodiment of the present invention.
  • the base station 60 includes a processor 61, a transmitter 62, a receiver 63, a memory 64, and a bus system 65.
  • the processor 61, the transmitter 62, the receiver 63 and the memory 64 are connected by a bus system 65 for storing instructions for executing instructions stored in the memory 64 to control the transmitter 62.
  • a signal is sent and the receiver 63 is controlled to receive the signal.
  • the processor 61 is configured to generate downlink control information DCI, where the DCI is used to schedule a first multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the current MTCH broadcast configuration information is in the next change period. Or the current MP changes;
  • the transmitter 62 is configured to send the DCI to the terminal device.
  • the memory 64 can include read only memory and random access memory and provide instructions and data to the processor.
  • a portion of the memory may also include non-volatile random access storage Device.
  • the memory can also store information of the device type.
  • the processor 61 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • the change period MP may refer to the change period MP of the MCCH in FIG. 4, or may also refer to the SC-MTCH configuration information change period MP defined by the SC-MTCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be equal to the MCCH change period or a multiple of the MCCH change period.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be configured through a system message or configured in the SC-MCCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be independently configured for each MTCH, or all SC-MTCHs in one cell may use the same SC-MTCH configuration information change period MP.
  • the method and apparatus for indicating that the configuration information of the current SC-MTCH is changed by scheduling the indication information in the DCI of the current SC-MTCH in the case that the terminal device receives the current multicast service is described in detail in the following.
  • the terminal device may listen to the search space of the DCI that schedules the MCCH on the PDCCH or receive the MCCH or receive other services. After the terminal device monitors the DCI of the scheduled MCCH, the terminal receives the MCCH through the DCI, thereby acquiring the current cell multicast configuration information. If the current intra-cell multicast configuration information does not change, the terminal device still monitors the search space of the DCI for scheduling the MCCH, and obtains the MCCH according to the DCI, which increases the overhead of the terminal device, causes waste of resources, and reduces system flexibility.
  • the embodiment of the present invention provides a multicast-based wireless communication method, so that if the current intra-cell multicast configuration information does not change, the terminal device still acquires the cell group after detecting the DCI of the scheduled MCCH. Broadcast configuration information increases the overhead of the terminal device and reduces the flexibility of the system.
  • FIG. 11 shows a multicast-based wireless communication method according to an embodiment of the present invention, the method comprising:
  • the terminal device receives the indication information sent by the base station, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, where the indication information is included in the MCCH for scheduling the multicast control channel.
  • the downlink control information DCI or included in the main information block MIB, or included in a direct indication for indicating a system message change on the paging occasion PO Format DIF
  • the terminal device acquires the changed current cell multicast configuration information according to the indication information.
  • the terminal device if the terminal device does not receive any multicast service, it only needs to detect the search space corresponding to the MCCH, and obtain the indication information included in the DCI for scheduling the MCCH from the search space, or detect The indication information included in the system main information block MIB, or the indication information included in the direct indication format DIF for indicating the system message change on the paging occasion PO, the terminal device can know whether the current cell multicast configuration information has changed. When the current cell multicast configuration information is changed by the indication information, and then the changed current cell multicast configuration information is re-acquired, the terminal device avoids repeatedly acquiring the current cell group when the current cell multicast configuration information is not changed. Broadcast configuration information reduces the resource overhead of the terminal device and increases the flexibility of the system.
  • the terminal device if the terminal device does not receive the current multicast service, the terminal device has the capability to detect the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space.
  • the indication information indicating that the current cell multicast configuration information changes in the current MP or the next MP is included, or the primary information block MIB sent by the receiving base station is included, and the MIB includes the indication that the current cell multicast configuration information is currently in the MIB.
  • the terminal device acquires the changed current cell multicast configuration information according to the indication information.
  • the terminal device receives the downlink control information DCI sent by the base station, where the DCI is used to schedule the MCCH, and the DCI may include indication information indicating that the current cell multicast configuration information changes within the current MP or the next MP. .
  • the terminal device may monitor the search space corresponding to the SC-MCCH on the NPDCCH, and obtain the scheduling SC-MCCH from the search space. DCI.
  • the indication field of the at least one bit may be included in the DCI of the scheduling SC-MCCH, and the indication field may indicate that the current cell multicast configuration information changes in the current MP or the next MP.
  • the indication field may include 1 bit.
  • the indication information may indicate that the current cell multicast configuration information is changed in the next MP or the current MP, or when the indication domain value is 1, the indication information may be Indicates that the current cell multicast configuration information is in the The pre-MP or the next MP did not change.
  • the indication field may further include two bits.
  • the indication information when the value of the indication field is “00”, the indication information may be indicating the current cell multicast configuration. The information changes in the current MP or the next MP; or when the value of the indication field is "01", the indication information may indicate that the current cell multicast configuration information has not changed in the next MP or the next MP.
  • the indication information included in the DCI for scheduling the SC-MCCH is used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP, and the indication information may be utilized in the DCI.
  • the indication field may further include 3 bits, and any binary combination of all the bits in the indication domain may be used as indication information to indicate whether the current cell multicast configuration information changes in the current MP or the next MP.
  • the at least one bit in the DCI of the scheduling SC-MCCH may be used to explicitly indicate that the current cell multicast service configuration information is changed, or the existing bit in the DCI may be used.
  • the configuration of the current cell multicast service configuration information is invisible, which is not limited in this embodiment of the present invention.
  • the terminal device detects the search space corresponding to the MCCH, and acquires the DCI sent in the search space for scheduling the MCCH, and learns by using the indication information included in the DCI.
  • the current cell multicast configuration information changes, so that the low-capability terminal device in the NB-IoT system does not need to simultaneously receive multiple DCIs in the same search space (for example, one DCI for scheduling MCCH, and the other for indicating current
  • the DCI of the cell multicast configuration information change only needs to receive the DCI of the scheduled MCCH to know whether the current cell multicast configuration information is changed in the next MP or the current MP, so as to avoid the current cell multicast configuration information not changing. Re-acquire the multicast configuration information of the cell.
  • the terminal device may receive a Master Information Block (MIB) sent by the base station, where the MIB may include indicating that the current cell multicast configuration information occurs in the current MP or the next MP. Changed instructions.
  • MIB Master Information Block
  • the current cell multicast configuration information may be directly broadcast as a system message.
  • the system can redefine the SIB, and the SIB20 can be redefined, so that the current cell multicast configuration information can be included in the SIB20.
  • the terminal device may first acquire the MIB and the SIB, and the MIB and the SIB are included in the MIB and the SIB.
  • the basic parameters of the cell configuration in this embodiment, the current cell multicast configuration information can be carried in the SIB, so there is no need to use DCI for scheduling.
  • the terminal device can learn the current cell multicast configuration information by reading the SIB.
  • the embodiment of the present invention includes indication information in the MIB, where the indication information is used to indicate that the current cell multicast configuration information changes in the current MP or the next MP. Therefore, the terminal device does not need to read the related SIB (for example, SIB20), and only needs to periodically read the MIB to know whether it is necessary to re-read the SIB (for example, SIB20) including the current cell multicast configuration information.
  • SIB20 related SIB
  • SIB20 only needs to periodically read the MIB to know whether it is necessary to re-read the SIB (for example, SIB20) including the current cell multicast configuration information.
  • the MIB may include an indication field of at least one bit bit, where the indication field is used to indicate that the current cell multicast configuration information changes in the current MP or the next MP.
  • the indication field may include 1 bit, where the indication field value 0 indicates that the current cell multicast configuration information changes in the current MP or next; or when the indication field value is 0,
  • the indication field indicates that the current cell multicast configuration information has not changed in the next MP or the current MP.
  • the indication field may further include two bits.
  • the indication field when the value of the indication field is “00”, the indication field indicates that the current cell multicast configuration information is changed by the current MP or the next; or When the value of the indication field is "01”, the indication field indicates that the current cell multicast configuration information has not changed in the next MP or current.
  • the indication information included in the MIB is used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP, and the indication information may be indicated by using at least one bit in the MIB, where The example is only one specific implementation of the present invention, but the embodiment of the present invention is not limited thereto.
  • the MIB may include three bits, and any binary combination of all the bits of the three bits may be used as indication information to indicate that the current cell multicast configuration information changes in the current MP or the next MP.
  • the current cell multicast service configuration list may be explicitly changed by adding at least one bit in the MIB, or the current cell multicast may be invisibly indicated by the existing bit in the MIB.
  • the service configuration list is changed, which is not limited in this embodiment of the present invention.
  • the terminal device obtains the change of the multicast configuration information in the current cell by receiving the MIB, so that the terminal device avoids re-acquiring the multicast configuration information of the cell when the current cell multicast configuration information does not change, thereby improving the system. flexibility.
  • the terminal device may receive a direct indication format sent by the base station.
  • DIF Direct Indication Format
  • the DIF may include indication information indicating that the current cell multicast configuration information changes within the current change period MP or the next MP.
  • the current cell multicast configuration information may be placed in the SC-MCCH logical channel for transmission, or may be placed in the system information SIB for broadcast.
  • the system may re-define the SIB, and the SIB20 may be redefined, so that the current cell multicast configuration information is included in the SIB20.
  • the terminal device may receive a Direct Indication Format (DIF) for indicating a system message change on the paging occasion PO, where the DIF may include indication information, where the indication information may indicate current cell multicast configuration information.
  • DIF Direct Indication Format
  • the DIF may include an indication field of at least one bit bit, where the indication field is used to indicate that the current cell multicast configuration information changes in the current MP or the next MP.
  • the indication field may include 1 bit. In the indication field, when the value of the indication field is 0, it indicates that the current cell multicast configuration information changes in the current MP; or when the value of the indication field is 0, The indication field indicates that the current cell multicast configuration information has not changed in the current MP. It should be understood that, in the embodiment of the present invention, the indication field may further include two bits.
  • the indication field when the value of the indication field is “00”, the indication field indicates that the current cell multicast configuration information is currently The MP changes; or when the value of the indication field is 01, the indication field indicates that the current cell multicast configuration information has not changed in the current MP.
  • the indication information included in the DIF is used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP, and the indication information may be indicated by using at least one bit in the DIF, where For example, only a specific implementation manner of the embodiment of the present invention is provided, but the embodiment of the present invention is not limited thereto.
  • the DIF may include three bits, and any binary combination of all the bits of the three bits may be used as indication information to indicate that the current cell multicast configuration information changes in the current MP or the next MP.
  • the current cell multicast configuration information may be explicitly indicated by adding at least one bit in the DIF, or the current cell multicast configuration may be invisibly indicated by the existing bit in the DIF.
  • the information is changed.
  • the DIF may be a DCI format formatN2 in the NB-IoT, where the DCI formatN2 may be used to indicate that the system information has changed on a paging opportunity of the terminal device, where the current cell multicast is indicated.
  • the indication information of the configuration information change may use the bit that has not been allocated in the DCI format N2, which is not limited in this embodiment of the present invention.
  • the current cell multicast configuration information includes a set of configuration information of at least one MTCH in the cell, where configuration information of each MTCH in the set includes scheduling a search space of each MTCH.
  • Configuration information may further include configuration information of the discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, and G-RNTI and MTCH corresponding to the session ID of the MTCH.
  • DRX discontinuous Reception
  • the scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the indication information indicates that the current cell multicast configuration information changes within the current MP or the next MP.
  • the change of the current cell multicast configuration information includes the deletion of the existing MTCH in the current cell, the addition of the MTCH in the current cell, and the change of the configuration information of the MTCH in the current cell.
  • the indication information may be used to indicate that the configuration information of the existing MTCH in the current cell is changed, or the MTCH is added in the current cell, or the existing MTCH is deleted in the current cell.
  • the terminal device may detect the search space corresponding to the SC-MCCH on the NPDCCH, and obtain the scheduling SC-MCCH from the search space. DCI.
  • An indication field of the at least one bit may be included in the DCI of the scheduling SC-MCCH, where the indication field may indicate that the configuration information of the existing MTCH in the current cell changes, or the MTCH is added in the current cell, or the current cell is deleted.
  • MTCH MTCH.
  • the terminal device may receive a master information block ("MIB") sent by the base station, where the MIB may include indication information, where the indication information is used to indicate that the current cell is already in the current cell.
  • MIB master information block
  • the configuration information of the MTCH changes, or a new MTCH is added to the current cell, or the existing MTCH is deleted in the current cell.
  • the terminal device may receive a Direct Indication Format (DIF) sent by the base station to indicate a system message change on the paging occasion PO, where the DIF may be
  • the indication information is used to indicate that the configuration information of the existing MTCH in the current cell is changed, or the MTCH is added in the current cell, or the existing MTCH is deleted in the current cell.
  • DIF Direct Indication Format
  • the indication information used to indicate that the existing MTCH in the current cell changes, or the MTCH in the current cell is added, or the indication information of deleting the existing MTCH in the current cell may be at least one bit in the DCI or MIB or DIF. Indicate the domain.
  • the multicast-based wireless communication method of the embodiment of the present invention is performed from the terminal device side.
  • the multicast-based wireless communication method according to the embodiment of the present invention will be described in detail below from the base station side.
  • FIG. 12 shows a multicast-based wireless communication method according to an embodiment of the present invention, the method comprising:
  • the base station generates indication information, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, where the indication information is included in the downlink control information DCI used for scheduling the multicast control channel MCCH. , or included in the main information block MIB, or included in a direct indication format DIF for indicating system message changes on the paging occasion PO;
  • the base station sends the indication information to the terminal device.
  • the base station generates indication information, which may be included in the DCI of the scheduled MCCH, or included in the main information block MIB, or included in the indication for changing the system message on the paging occasion PO.
  • the base station sends the indication information to the terminal device, and the terminal device can learn whether the current cell multicast configuration information changes, and when the indication information is obtained, the current cell multicast configuration information is changed, and then the change is re-acquired. After the current cell multicast configuration information, the terminal device avoids repeatedly obtaining the current cell multicast configuration information when the current cell multicast configuration information is not changed, thereby improving system flexibility.
  • the base station may send downlink control information DCI to the terminal device, where the DCI is used to schedule the MCCH, and the DCI includes indication information indicating that the current cell multicast configuration information changes within the current MP or the next MP.
  • the indication information may be information used in scheduling DCI of the single cell multicast control channel SC-MCCH.
  • the base station sends a DCI for scheduling the SC-MCCH to the terminal device in the search space on the PDCCH, and the DCI of the scheduled SC-MCCH may include an indication field of at least one bit, where the indication field may indicate the current cell multicast configuration information. changes happened. For details, refer to the related description on the terminal device side. For the sake of brevity of the application file, we will not repeat them here.
  • the base station may send a Master Information Block (MIB) to the terminal device, where the MIB may include indicating that the current cell multicast configuration information changes within the current MP or the next MP. Instructions.
  • MIB Master Information Block
  • the terminal device After receiving the SIB sent by the base station for the first time, it is not necessary to continuously read the SIB continuously, and only needs to periodically read the MIB sent by the base station to know whether it is necessary to re-read the current cell multicast.
  • the SIB of the configuration information (for example, SIB20). Therefore, by receiving the MIB, it is learned that the current multicast configuration information in the cell changes, so that the terminal device avoids that the current cell multicast configuration information does not occur.
  • SIB Master Information Block
  • the base station may broadcast the current cell multicast configuration information to the terminal device.
  • the system can redefine the SIB, and the SIB20 can be redefined to include the current cell multicast configuration information in the SIB20.
  • the terminal device After the terminal device accesses the cell, the terminal device first acquires the MIB and the SIB, and the basic parameters of the cell configuration are included in the MIB and the SIB.
  • the current cell multicast configuration information is carried in the SIB, so Use DCI for scheduling.
  • the terminal device can learn the current cell multicast configuration information by reading the SIB. For the terminal device, after the first acquisition of the SIB, it is not necessary to continuously read the SIB continuously.
  • the embodiment of the present invention includes indication information in the MIB, where the indication information is used to indicate that the current cell multicast configuration information changes in the current MP or the next MP. Therefore, the terminal does not need to read the relevant SIB (for example, SIB20), and only needs to periodically read the MIB to know whether it is necessary to re-read the SIB (for example, SIB20) including the current cell multicast configuration information.
  • SIB20 for example, SIB20
  • the terminal device For details, refer to the description of the terminal device. For the sake of brevity of the application file, details are not described here.
  • the base station sends a Direct Indication Format (DIF) to the terminal device, where the DIF may include indicating that the current cell multicast configuration information occurs in the current change period MP or the next MP. Changed instructions.
  • DIF Direct Indication Format
  • the current cell multicast configuration information includes configuration information of the at least one SC-MTCH in the current cell, where the configuration information of the MTCH includes configuration information of a search space for scheduling the MTCH.
  • the configuration information of the MTCH may further include: configuration information of a discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, a G-RNTI corresponding to a session ID of the MTCH, and the The scheduling information of the MTCH, the neighboring cell information, and the like are not specifically limited in this embodiment of the present invention.
  • the indication information may further indicate that the MTCH in the current cell is deleted, or the current cell adds a MTCH, or the configuration information of the existing MTCH in the current cell changes.
  • the multicast-based wireless communication method of the embodiment of the present invention is described in detail above with reference to FIG. 11 and FIG. 12, and the terminal device and the base station according to the embodiment of the present invention will be described in detail below.
  • FIG. 13 shows a terminal device 70 in accordance with an embodiment of the present invention.
  • the terminal device 70 is capable of performing the various steps performed by the terminal device in FIGS. 11 and 12, and to avoid repetition, it will not be described in detail herein.
  • the terminal device 70 includes:
  • the receiving module 71 is configured to receive the indication information sent by the base station, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, where the indication information is included in the scheduling multicast control channel MCCH.
  • the downlink control information DCI or included in the main information block MIB, or included in the direct indication format DIF for indicating a system message change on the paging occasion PO;
  • the obtaining module 72 is configured to obtain the changed current cell multicast configuration information according to the indication information.
  • the terminal device if the terminal device does not receive any multicast service, it only needs to detect the search space corresponding to the MCCH, and obtain the indication information included in the DCI for scheduling the MCCH from the search space, or detect The indication information included in the system main information block MIB, or the indication information included in the direct indication format DIF for indicating the system message change on the paging occasion PO, the terminal device can know whether the current cell multicast configuration information has changed. When the current cell multicast configuration information is changed by the indication information, and then the changed current cell multicast configuration information is re-acquired, the terminal device avoids repeatedly acquiring the current cell group when the current cell multicast configuration information is not changed. Broadcast configuration information reduces the resource overhead of the terminal device and increases the flexibility of the system.
  • the receiving module 71 may receive the downlink control information DCI sent by the base station, where the DCI is used to schedule the multicast control channel MCCH, where the DCI includes indicating that the current cell multicast configuration information is in the current change period MP or An indication of a change in the MP. .
  • the terminal device may continuously monitor the DCI for scheduling the SC-MCCH in the search space on the PDCCH, where the scheduling SC-MCCH
  • the DCI may include an indication field of at least one bit, and the indication field may indicate that the current cell multicast configuration information is changed.
  • the receiving module 71 may receive a master information block ("MIB") sent by the base station, where the MIB may include indicating that the current cell multicast configuration information is in the current change period MP or next. An indication of a change in the MP.
  • MIB master information block
  • the current cell multicast configuration information may be directly broadcast as a system message.
  • the system can redefine the SIB, and the SIB20 can be redefined to include the current cell multicast configuration information in the SIB20.
  • the terminal device After the terminal device accesses the cell, the terminal device first acquires the MIB and the SIB, and the basic parameters of the cell configuration are included in the MIB and the SIB, and the terminal device can receive the PDCCH according to the cell configuration in the MIB and the SIB.
  • the DCI can schedule the terminal device to receive the SC-MCCH or SC-MTCH.
  • the terminal device may first read related information from the MIB, where the information of the MIB may include indication information, where the indication information is used to indicate that the current cell multicast configuration information is currently A change occurs in the MP or the next MP.
  • the receiving module 71 may receive information in a Direct Indication Format (DIF) sent by the base station, where the DIF is used to indicate a system message change on the paging occasion PO.
  • the DIF may include indication information indicating that the current cell multicast configuration information changes within the current change period MP or the next MP.
  • the current cell multicast configuration list may not be placed in the SC-MCCH logical channel, but may be directly broadcast as a system message.
  • the system can redefine the SIB, and the SIB20 can be redefined to include the current cell multicast configuration information in the SIB20.
  • the terminal device After the terminal device accesses the cell, the terminal device first acquires the MIB and the SIB, and the basic parameters of the cell configuration are included in the MIB and the SIB, and the terminal device can receive the dedicated or public DCI on the PDCCH according to the cell configuration in the MIB and the SIB.
  • the DCI can schedule the terminal device to receive the SC-MCCH or SC-MTCH.
  • the Direct Indication Format (DIF) indicating the change of the system message on the paging occasion PO may include indication information, and the indication information may indicate the current cell.
  • the multicast configuration information changes in the current MP or the next MP.
  • the current cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the current cell, where configuration information of each MTCH in the set includes scheduling each Configuration information of the PDCCH search space of the MTCH.
  • the configuration information of the MTCH may further include configuration information of a discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, a G-RNTI corresponding to the session ID of the MTCH, and the MTCH.
  • DRX discontinuous Reception
  • the scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the indication information may further indicate that the MTCH in the current cell is deleted, or the current cell adds a MTCH, or the configuration information of the existing MTCH in the current cell changes.
  • FIG 14 shows a base station 80 in accordance with an embodiment of the present invention.
  • the base station 80 is capable of performing the various steps performed by the base station in Figures 11-12. To avoid repetition, details are not described herein.
  • Base station 80 includes:
  • the processing module 81 is configured to generate indication information, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, and the indication information is included in the scheduling.
  • the downlink control information DCI of the multicast control channel MCCH is included in the main information block MIB or included in the direct indication format DIF for indicating the system message change on the paging occasion PO;
  • the sending module 82 is configured to send the indication information to the terminal device.
  • the base station generates indication information, which may be included in the DCI of the scheduled MCCH, or included in the main information block MIB, or included in the indication for changing the system message on the paging occasion PO.
  • the base station sends the indication information to the terminal device, and the terminal device can learn whether the current cell multicast configuration information changes, and when the indication information is obtained, the current cell multicast configuration information is changed, and then the change is re-acquired. After the current cell multicast configuration information, the terminal device avoids repeatedly obtaining the current cell multicast configuration information when the current cell multicast configuration information is not changed, thereby improving system flexibility. .
  • the processing module 81 generates indication information, which may be information in the DCI, and the DCI is used to schedule the multicast control channel MCCH.
  • the base station generates indication information, where the indication information may be information used in scheduling DCI of the multicast control channel MCCH.
  • the base station sends a DCI for scheduling the SC-MCCH to the terminal device in the search space on the PDCCH, and the DCI of the scheduled SC-MCCH may include an indication field of at least one bit, where the indication field may indicate the current cell multicast configuration information. changes happened.
  • the indication information may be information used in scheduling DCI of the multicast control channel MCCH.
  • the base station sends a DCI for scheduling the SC-MCCH to the terminal device in the search space on the PDCCH, and the DCI of the scheduled SC-MCCH may include an indication field of at least one bit, where the indication field may indicate the current cell multicast configuration information. changes happened.
  • the terminal device For details, refer to the description of the terminal device. For the sake of brevity of the application file, details are not described here.
  • the processing module 81 generates indication information, which may be information in a Master Information Block (MIB).
  • MIB Master Information Block
  • the current cell multicast configuration information may be directly broadcast as a system message.
  • the system can redefine the SIB, and the SIB20 can be redefined to include the current cell multicast configuration information in the SIB20.
  • the terminal device After the terminal device accesses the cell, the terminal device first acquires the MIB and the SIB, and the basic parameters of the cell configuration are included in the MIB and the SIB, and the terminal device can receive the dedicated or public DCI on the PDCCH according to the cell configuration in the MIB and the SIB.
  • the DCI can schedule the terminal device to receive the SC-MCCH or SC-MTCH.
  • the indication information generated by the base station may be included in the MIB, and the indication information is used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the indication information is used to indicate that the current cell multicast configuration information is changed in the current MP or the next MP.
  • the processing module 81 generates indication information, which may be information in a Direct Indication Format (DIF).
  • DIF is used to schedule paging messages of the terminal device.
  • the current cell multicast configuration information may not be sent in the SC-MCCH logical channel, but may be directly broadcast as a system message.
  • the system can redefine the SIB, and the SIB20 can be redefined to include the current cell multicast configuration information in the SIB20.
  • the terminal device After the terminal device accesses the cell, the terminal device first acquires the MIB and the SIB, and the basic parameters of the cell configuration are included in the MIB and the SIB, and the terminal device can receive the dedicated or public DCI on the PDCCH according to the cell configuration in the MIB and the SIB.
  • the DCI can schedule the terminal device to receive the SC-MCCH or SC-MTCH.
  • the indication information generated by the base station may be included in a Direct Indication Format (DIF) for indicating a system message change on the paging occasion PO, where the indication information may indicate that the current cell multicast configuration information is in the current MP. Or the next MP changes.
  • DIF Direct Indication Format
  • the current cell multicast configuration information is a set of configuration information of at least one SC-MTCH in the cell, where the configuration information of each MTCH in the set includes a search for scheduling each MTCH.
  • Configuration information for the space may further include configuration information of a discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, a G-RNTI corresponding to the session ID of the MTCH, and the MTCH.
  • DRX discontinuous Reception
  • the scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the base station generates the indication information, where the indication information may further indicate that the configuration information of deleting the existing MTCH in the current cell or adding the MTCH in the current cell or the existing MTCH in the current cell is changed.
  • FIG. 15 shows a terminal device 90 according to an embodiment of the present invention.
  • the terminal device 90 includes a processor 91, a transmitter 92, a receiver 93, a memory 94, and a bus system 95.
  • the processor 91, the transmitter 92, the receiver 93 and the memory 94 are connected by a bus system 95 for storing instructions for executing instructions stored in the memory 94 to control the transmitter 92.
  • a signal is sent and the receiver 93 is controlled to receive the signal.
  • the receiver 93 is configured to receive the indication information sent by the base station, where the indication information is used to indicate that the current cell multicast configuration information is changed in the current change period MP or the next MP, where the indication information is included in the scheduling multicast control channel MCCH.
  • the downlink control information DCI or included in the main information block MIB, or included in the direct indication format DIF for indicating system message change on the paging occasion PO;
  • the processor 91 is configured to obtain the current cell multicast configuration information according to the indication information.
  • the indication information may be information in a DCI, where the DCI is used to schedule a multicast control channel MCCH.
  • the indication information may be information in a Master Information Block (MIB).
  • MIB Master Information Block
  • the indication information indicating that the current cell multicast configuration information is changed in the current change period MP or the next MP may be in a Direct Indication Format (DIF).
  • the DIF indicates a system message change on the paging occasion PO.
  • the current cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where configuration information of each MTCH in the set includes scheduling each MTCH.
  • Search space configuration information may further include configuration information of a discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, a G-RNTI corresponding to the session ID of the MTCH, and the MTCH.
  • DRX discontinuous Reception
  • the scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the indication information may further indicate that the configuration information of deleting the existing MTCH in the current cell or adding the MTCH in the current cell or the existing MTCH in the current cell is changed.
  • the memory 94 can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 91 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • FIG. 16 shows a multicast-based base station 1000 according to an embodiment of the present invention.
  • the base station 1000 includes a processor 1001, a transmitter 1002, a receiver 1003, a memory 1004, and a bus system 1005.
  • the processor 1001, the transmitter 1002, the receiver 1003, and the memory 1004 are connected by a bus system 1005.
  • the memory 1004 is configured to store an instruction
  • the processor 1001 is configured to execute an instruction stored by the memory 1004 to control the transmitter 1002.
  • the signal is transmitted and the receiver 1003 is controlled to receive the signal.
  • the processor 1001 generates indication information, where the indication information is used to indicate current cell multicast.
  • the configuration information is changed in the current change period MP or the next MP, and the indication information is included in the downlink control information DCI of the scheduled multicast control channel MCCH, or included in the main information block MIB, or included in the paging.
  • the direct indication format DIF indicating the change of the system message on the timing PO;
  • the transmitter 1002 is configured to send the indication information to the terminal device.
  • the indication information may be information in a DCI, where the DCI is used to schedule a multicast control channel MCCH.
  • the indication information may be information in a Master Information Block (MIB).
  • MIB Master Information Block
  • the indication information may be information in a Direct Indication Format (DIF), where the DIF is used to indicate a system message change on the paging occasion PO.
  • DIF Direct Indication Format
  • the current cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where configuration information of each MTCH in the set includes scheduling each MTCH.
  • Search space configuration information may further include configuration information of a discontinuous reception (Discontinuous Reception, referred to as “DRX”) of the MTCH, a G-RNTI corresponding to the session ID of the MTCH, and the MTCH.
  • DRX discontinuous Reception
  • the scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the base station generates the indication information, where the indication information may further indicate that the configuration information of deleting the existing MTCH in the current cell or adding the MTCH in the current cell or the existing MTCH in the current cell is changed.
  • the memory 1004 can include read only memory and random access memory and provide instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 1003 can be configured to execute instructions stored in a memory, and when the processor executes instructions stored in the memory, the processor is operative to perform various steps and/or processes of the method embodiments described above.
  • NB-IoT In the existing SC-PTM-based multicast service, different multicast services share the same SC-MTCH search space.
  • NB-IoT needs to introduce SC-PTM-based multicast services, NB-IoT has higher coverage requirements than normal LTE (for example, 20 dB higher than normal LTE), so duplicates are required in NB-IoT.
  • the method of sending extends the coverage of multicast.
  • Different multicast services may have different coverage requirements: for example, for the NB-IoT terminal of the meter reading service, The water meter is usually installed indoors, so the multicast service for the software update of the meter reading module on the water meter (referred to as the multicast service 1) has higher multicast coverage requirements, and needs to use multiple repeated implementations to achieve the coverage target;
  • the software update service of the installed NB-IoT module (recorded as multicast service 2), the NB-IoT modules on these street lights are generally deployed outdoors, so the coverage requirements are generally not high, and the base station does not need to use multiple repetitions. Coverage requirements can be met. Therefore, if the SC-MTCH of all multicast services share the same search space, the multicast service 2 also needs to use multiple repetitions to send DCI, which causes waste of downlink resources. .
  • the present invention needs to configure different search spaces for SC-MTCHs of different multicast services when introducing SC-PTM-based multicast services in NB-IoT, and introduce SC into SC-MTCH configuration information.
  • - MTCH search space configuration and supports different maximum repetition times Rmax for different SC-MTCH search spaces, that is, search spaces with different coverage requirements for different SC-MTCH services.
  • FIG. 17 shows a multicast-based wireless communication method according to an embodiment of the present invention, the method includes:
  • the terminal device receives cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of at least one MTCH in the cell, where configuration information of each MTCH in the set includes a physical downlink control channel PDCCH search.
  • the present invention configures different search spaces for the SC-MTCH of different multicast services, and introduces the search space configuration of the SC-MTCH in the SC-MTCH configuration information.
  • the information so that the DCI of the scheduling MTCH has different search spaces, reduces the number of retransmissions of the multicast service, and saves downlink resources.
  • the terminal device may receive the cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where each SC-MTCH in the set
  • the configuration information includes configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include scheduling information of the SC-MTCH, neighbor cell information, configuration information of the discontinuous reception DRX of the SC-MTCH, and multicast wireless corresponding to the session SessionID of the SC-MTCH.
  • the network temporary identifier G-RNTI and the like are not limited in this embodiment of the present invention.
  • the search space configuration information of the PDCCH of the MTCH Can include at least one of the following information:
  • the occupancy ratio is represented by G.
  • the parameter Rmax represents the number of consecutive available subframes occupied by the search space.
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH or SC-MCCH, and may be dynamically scheduled by the base station in the preset search space, or may be used in system broadcast.
  • Semi-static scheduling of information If the SC-MCCH is a semi-persistent scheduling of the system message, the terminal may obtain the SC-MCCH sent by the base station on the corresponding resource according to the scheduling information in the SIB after the SIB is read, and include the cell group in the SC-MCCH. Broadcast configuration information.
  • the terminal after the terminal device accesses the cell, the terminal searches for the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space, and the terminal device acquires the SC sent by the base station by using the DCI.
  • the terminal device acquires the SC sent by the base station by using the DCI.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the MIB and the SIB are obtained from the base station, and the cell multicast configuration information may be included in the SIB.
  • the multicast-based wireless communication method of the present invention is described in detail above from the terminal device side.
  • the multicast-based wireless communication method of the present invention will be described in detail below from the base station side.
  • FIG. 18 shows a multicast-based wireless communication method according to an embodiment of the present invention, the method comprising:
  • the base station generates cell multicast configuration information, where the cell multicast configuration information includes intra-cell to a set of configuration information of one MTCH, where configuration information of each MTCH in the set includes configuration information of a downlink physical control channel PDCCH search search space of each MTCH;
  • the base station sends the cell multicast configuration information to the terminal device.
  • the present invention configures different search spaces for the SC-MTCH of different multicast services, and introduces the search space configuration of the SC-MTCH in the SC-MTCH configuration information.
  • the information so that the DCI of the scheduling MTCH has different search spaces, reduces the number of retransmissions of the multicast service, and saves downlink resources.
  • the base station may generate cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where configuration information of each SC-MTCH in the set includes The configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include neighbor cell information, configuration information of the discontinuous reception DRX of the SC-MTCH, and a temporary radio network temporary identifier G-RNTI corresponding to the session session ID of the SC-MTCH, and the like.
  • the embodiment of the invention is not limited thereto.
  • the search space configuration information of the PDCCH of the MTCH may include at least one of the following information:
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH, and may be dynamically scheduled by the base station in the preset search space, or may be semi-statically scheduled using the system broadcast information. .
  • the terminal after the terminal device accesses the cell, the terminal searches for the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space, and the terminal device acquires the SC sent by the base station by using the DCI.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the SC-MCCH is a semi-persistent scheduling of the system message
  • the terminal acquires the SC-MCCH sent by the base station on the corresponding resource according to the scheduling information in the SIB after reading the SIB.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the base station after the terminal device accesses the cell, the base station sends the MIB and the SIB to the terminal device, where the cell multicast configuration information may be included in the SIB.
  • the multicast-based wireless communication method of the present invention has been described above, and the multicast-based wireless communication device of the present invention will be described in detail below.
  • FIG. 19 shows a terminal device 1100 according to an embodiment of the present invention.
  • the terminal device 1100 includes:
  • the receiving module 1110 is configured to receive cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of at least one MTCH in the cell, where configuration information of each MTCH in the set includes a physical downlink control channel. Configuration information of a PDCCH search space, where the PDCCH search space is used to send a DCI of a scheduling MTCH;
  • the obtaining module 1120 is configured to acquire the MTCH in the cell according to the cell multicast configuration information.
  • the terminal device may receive the cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where each SC-MTCH in the set
  • the configuration information includes configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include neighbor cell information, configuration information of the discontinuous reception DRX of the SC-MTCH, and a temporary radio network temporary identifier G-RNTI corresponding to the session session ID of the SC-MTCH, and the like.
  • the embodiment of the invention is not limited thereto.
  • the search space configuration information of the PDCCH of the MTCH may include at least one of the following information:
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH or SC-MCCH, and may be dynamically scheduled by the base station in the preset search space by using DCI.
  • Semi-static scheduling of system broadcast information can also be used.
  • the terminal after the terminal device accesses the cell, the terminal searches for the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space, and the terminal device acquires the SC sent by the base station by using the DCI.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the terminal acquires the SC-MCCH sent by the base station on the corresponding resource according to the scheduling information in the SIB, and includes the SC-MCCH in the SC-MCCH.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the MIB and the SIB are obtained from the base station, and the cell multicast configuration information may be included in the SIB.
  • terminal device 1100 may correspond to the terminal device in the method embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the terminal device 1100 respectively implement the method in FIG. The corresponding process, for the sake of brevity, will not be described here.
  • Figure 20 illustrates the present invention showing a base station 1200 that includes:
  • the processing module 1210 is configured to generate cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of the MTCH in the cell, where the configuration information of each MTCH in the set includes the downlink physical control channel PDCCH of each MTCH. Search configuration information for the search space;
  • the sending module 1220 is configured to send the cell multicast configuration information to the terminal device.
  • the base station may generate cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where configuration information of each SC-MTCH in the set includes The configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include configuration information of the discontinuous reception DRX of the SC-MTCH, neighbor cell information, and a temporary radio network temporary identifier G-RNTI corresponding to the session session ID of the SC-MTCH.
  • the embodiment of the present invention is not limited thereto.
  • the search space configuration information of the PDCCH of the MTCH may include at least one of the following information:
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH or the SC-MCCH, and may be dynamically scheduled by the base station in the preset search space, or may be semi-statically scheduled using the system broadcast information.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the base station after the terminal device accesses the cell, the base station sends the MIB and the SIB to the terminal device, where the cell multicast configuration information may be included in the SIB.
  • the base station 1200 may correspond to the base station in the method embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the base station 1200 are respectively implemented to implement the corresponding processes of the method in FIG. For the sake of brevity, we will not repeat them here.
  • FIG. 21 shows a terminal device 1300 according to an embodiment of the present invention.
  • the terminal device 1300 includes a receiver 1330, a processor 1310, a transmitter 1320, a memory 1340, and a bus system 1350.
  • the receiver 1330, the processor 1310, the transmitter 1320 and the memory 1340 are connected by a bus system 1350 for storing instructions for executing instructions stored in the memory 1340 to control the receiver 1310.
  • a signal is received and the transmitter 1320 is controlled to send an instruction.
  • the receiver 1330 is configured to receive cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of the MTCH in the cell, where configuration information of each MTCH in the set includes a physical downlink control channel PDCCH. Searching for configuration information of the space, the PDCCH search space is used to send a DCI for scheduling the MTCH;
  • the processor 1310 is configured to acquire the MTCH in the cell according to the cell multicast configuration information.
  • the terminal device may receive the cell multicast configuration information sent by the base station, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where each SC-MTCH in the set
  • the configuration information includes configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include neighbor cell information, configuration information of the discontinuous reception DRX of the SC-MTCH, and a session SessionID of the SC-MTCH.
  • the corresponding multicast wireless network temporary identifier G-RNTI and the like are not limited in this embodiment of the present invention.
  • the search space configuration information of the PDCCH of the MTCH may include at least one of the following information:
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH or SC-MCCH, and may be dynamically scheduled by the base station in the preset search space, or may be used in system broadcast. Semi-static scheduling of information.
  • the terminal after the terminal device accesses the cell, the terminal searches for the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space, and the terminal device acquires the SC sent by the base station by using the DCI.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the terminal acquires the SC-MCCH sent by the base station on the corresponding resource according to the scheduling information in the SIB, and includes the SC-MCCH in the SC-MCCH.
  • the cell multicast configuration information is included in the SC-MCCH.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the MIB and the SIB are obtained from the base station, and the cell multicast configuration information may be included in the SIB.
  • the terminal device 1300 may be specifically the terminal device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiments.
  • the memory 1340 can include read only memory and random access memory and provides instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 1310 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • FIG. 22 shows a base station 1400 according to an embodiment of the present invention, where the base station 1400 includes a receiver 1430, processor 1410, transmitter 1420, memory 1440, and bus system 1450.
  • the receiver 1430, the processor 1410, the transmitter 1420, and the memory 1440 are connected by a bus system 1450 for storing instructions, and the processor 1410 is configured to execute instructions stored by the memory 1440 to control the receiver 1410.
  • a signal is received and the transmitter 1420 is controlled to send an instruction.
  • the processor 1410 is configured to generate cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of the MTCH in the cell, where the configuration information of each MTCH in the set includes the downlink physical control channel of each MTCH.
  • the configuration information transmitter 1420 of the PDCCH search search space is configured to send the cell multicast configuration information to the terminal device.
  • the base station may generate cell multicast configuration information, where the cell multicast configuration information includes a set of configuration information of at least one SC-MTCH in the cell, where configuration information of each SC-MTCH in the set includes The configuration information of the PDCCH search space of each SC-MTCH; the terminal device acquires the SC-MTCH in the cell according to the cell multicast configuration information.
  • the configuration information of the SC-MTCH may further include neighbor cell information, configuration information of the discontinuous reception DRX of the SC-MTCH, and a temporary radio network temporary identifier G-RNTI corresponding to the session session ID of the SC-MTCH, and the like.
  • the embodiment of the invention is not limited thereto.
  • the search space configuration information of the PDCCH of the MTCH may include at least one of the following information:
  • search space configuration information of the PDCCH of the MTCH may include other information, which is not limited in this embodiment of the present invention.
  • different MTCHs have different MTCH search spaces.
  • the cell multicast configuration information may be carried in the multicast control channel MCCH or SC-MCCH, and may be dynamically scheduled by the base station in the preset search space, or may be used in system broadcast. Semi-static scheduling of information.
  • the terminal after the terminal device accesses the cell, the terminal searches for the search space corresponding to the SC-MCCH, and obtains the DCI for scheduling the SC-MCCH from the search space, and the terminal device acquires the SC sent by the base station by using the DCI.
  • -MCCH including the cell multicast configuration in the SC-MCCH Set the information.
  • the terminal acquires the SC-MCCH sent by the base station on the corresponding resource according to the scheduling information in the SIB, and includes the SC-MCCH in the SC-MCCH.
  • the cell multicast configuration information may be carried in the system information block SIB.
  • the base station after the terminal device accesses the cell, the base station sends the MIB and the SIB to the terminal device, where the cell multicast configuration information may be included in the SIB.
  • the device 1400 may be specifically the terminal device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiments.
  • the memory 1440 can include read only memory and random access memory and provides instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 1410 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • the capability of a terminal device that requires high power consumption and terminal cost is often limited.
  • Such terminal devices in the idle (IDLE) state often have no ability to simultaneously monitor and receive paging information while receiving multicast services.
  • the NB-IoT terminal needs to monitor the SC-PTM multicast service, it needs to be in the Physical Resource Block (PRB) where the SC-MTCH is located (referred to as PRB1).
  • PRB Physical Resource Block
  • the search space of the SC-MTCH is continuously monitored, and the SC-MTCH is received according to the detected DCI.
  • the NB-IoT terminal device If the NB-IoT terminal device is in an idle state and the paging message in the cell is only sent on the PRB2, the NB-IoT terminal is on the corresponding paging occasion (Paging Occasion, referred to as "PO").
  • Paging Occasion Paging Occasion
  • the multicast service on PRB1 and the paging message that may be sent on the PRB cannot be received at the same time. This is because the bandwidth of the NB-IoT terminal is one PRB, that is, the NB-IoT terminal can only work on one PRB at the same time. Therefore, when introducing SC-PTM-based multicast services in NB-IoT, it is necessary to solve the problem of how terminal devices receive paging.
  • the NB-IoT terminal in the idle state receives the multicast service, and each time it arrives at its own paging moment (Paging Occasion, referred to as "PO"), if it is receiving a single cell group Single Cell Multicast Control Channel (SC-MCCH) or Single Cell Multicast Traffic Channel (SC-MTCH) SC-MTCH, each time the NB-IoT terminal is looking for
  • the paging moments are preferentially received by the paging message, and the terminal device will stop receiving the SC-MCCH currently being received or SC-MTCH, and detects whether it is paged on the common search space ("CSS”) corresponding to its paging.
  • SCS common search space
  • the present invention provides a multicast-based wireless communication method to solve the problem that the terminal device stops receiving the SC-MCCH or SC-MTCH currently being received every time it arrives at its own PO, and the PRB to which the paging message is located The problem of receiving paging information that may exist, thereby causing a large impact on the multicast service currently being received.
  • FIG. 23 shows a multicast-based wireless communication method of the present invention, the method comprising:
  • the terminal device receives the downlink control information (DCI) sent by the base station, where the DCI is used to schedule the MTCH or the MCCH, where the DCI includes indication information, and the indication information is received by the terminal device in the process of receiving the multicast service channel MTCH or the multicast control channel (MCCH). And configured to indicate whether the terminal device has a paging in a preset time-frequency resource;
  • DCI downlink control information
  • the terminal device determines that no paging is scheduled in the preset time-frequency resource, the terminal device does not monitor the search space of the corresponding paging in the preset time-frequency resource; if the terminal device determines that the paging is in the preset If the paging device is scheduled in the time-frequency resource, and the terminal device has at least one paging opportunity in the preset time-frequency resource, the terminal device monitors the search space corresponding to the paging on the paging occasion, and stops receiving the paging space.
  • MTCH or the MCCH the terminal device determines that no paging is scheduled in the preset time-frequency resource, the terminal device does not monitor the search space of the corresponding paging in the preset time-frequency resource; if the terminal device determines that the paging is in the preset If the paging device is scheduled in the time-frequency resource, and the terminal device has at least one paging opportunity in the preset time-frequency resource, the terminal device monitors the search space corresponding to the paging
  • the embodiment of the present invention indicates, by using the indication information included in the DCI of the scheduling MTCH or the MCCH, whether the terminal device has a paging in the preset time-frequency resource, and if there is no paging in the preset time-frequency resource, the terminal device
  • the search space of the corresponding paging is not monitored in the preset time-frequency resource, and the terminal device may not receive the paging message of the terminal device at the target paging moment, but continue to monitor the search space of the SC-MTCH or the SC-MCCH.
  • the terminal device first detects a DCI for scheduling the SC-MCCH or the MTCH in a corresponding search space of the NPDCCH in the process of receiving the SC-MTCH or the SC-MCCH.
  • the terminal device continuously monitors the DCI for scheduling the SC-MTCH in the search space corresponding to the NPDCCH, there is no capability to simultaneously detect the DCI for scheduling the paging message. Therefore, when the terminal device detects the DCI for scheduling the SC-MTCH in the corresponding search space of the NPDCCH, the DCI of the scheduling SC-MTCH may be included to indicate whether the terminal device is paged in the preset time-frequency resource.
  • the DCI that schedules the SC-MCCH may include indication information indicating whether the terminal device is paged in the preset time-frequency resource.
  • the indication information used to indicate whether the terminal device is paged in the preset time-frequency resource may be included in the DCI of the scheduling SC-MCCH, or may be included in the scheduling SC at the same time.
  • -MTCH in the DCI.
  • the terminal device monitors the first DCI of the scheduled SC-MCCH and the second DCI of the scheduled SC-MTCH in the search space of the NPDCCH corresponding to the SC-MCCH and the SC-MTCH according to its service requirement, in the first DCI and the second
  • the DCI may include indication information indicating whether there is a paging in the preset time-frequency resource.
  • the terminal device may determine whether to detect and receive the paging message in the preset time-frequency resource according to the indication information in the first DCI or the indication information in the second DCI. If the terminal device determines that there is a paging in the preset time-frequency resource, and the terminal device has at least one paging opportunity PO in the preset time-frequency resource, the terminal device monitors the paging opportunity PO corresponding to the homing The search space of the call, and may stop receiving the MTCH or the MCCH; if the terminal device determines that there is no paging in the preset time-frequency resource, the terminal device does not monitor the corresponding search in the preset time-frequency resource. The search space of the call, thereby avoiding that when there is no paging message of the terminal device in the preset time-frequency resource, the terminal device still stops the SC-MTCH or SC-MCCH currently being received, and generates the multicast service. Great impact.
  • the terminal device when the terminal device receives the SC-MTCH or SC-MTCH sent by the base station, the terminal device can monitor the DCI or the monitoring for scheduling the SC-MCCH in the search space corresponding to the NPDCCH.
  • the DCI of the SC-MTCH is scheduled.
  • the search space corresponding to the SC-MCCH may be configured by a system message, and the search space of the SC-MTCH may be configured by the multicast configuration information corresponding to the SC-MTCH in the current cell multicast configuration message.
  • the indication field of at least one bit may be included in the DCI of the scheduling SC-MCCH.
  • the indication information indicates that the terminal device is paged in the preset time-frequency resource, or when the value of the 0th bit bit is 0, the indication The information indicates that the terminal device is not paged within the preset time-frequency resource.
  • the indication field including at least one bit in the DCI of the SC-MTCH may be used to indicate whether the terminal device is paged in the preset time-frequency resource.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is occupied by an SC-MTCH or an SC-MCCH scheduled by the DCI.
  • time cost The time-frequency resource used to send the paging in the interval.
  • the terminal device may detect whether the terminal device is in the preset time-frequency resource by detecting the indication information in the DCI of the SC-MCCH or the SC-MTCH in the NPDCCH.
  • FIG. 24 shows an indication field including 3 bits in a DCI for scheduling SC-MTCH. It is assumed that the terminal device is the first terminal device of FIG. 24, and the first terminal device detects that the first terminal device is in the 0 bit bit that includes the indication information in the DCI, and when the 0th bit bit is 1.
  • the preset time-frequency resource is paged.
  • the indication information indicates that the first terminal device is not paged in the preset time-frequency resource.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period, and may also be a time-frequency used by the terminal device to receive a time occupied by the SC-MTCH or the SC-MCCH. Resources.
  • the indication domain location of the indication information may be specifically mapped with the device identifier of the terminal device according to a preset rule.
  • the terminal may map the location of the indication domain corresponding to the terminal device according to the exclusive address (Identification, or "ID") of the terminal device, and then check the scheduling SC-
  • the indicated domain location obtained by the mapping in the DCI of the MTCH or SC-MCCH further determines whether it will be paged within the preset time-frequency resource.
  • FIG. 24 shows an indication field including 3 bits in a DCI for scheduling SC-MTCH. For the first terminal device in FIG.
  • the corresponding indication domain location obtained by mapping the device ID according to the preset rule may be the 0th bit, and the first terminal device may check the 0th bit in the DCI of the scheduling SC-MTCH.
  • the domain information is indicated, and it can be determined whether the terminal will be paged in the preset next cycle.
  • the second terminal device may obtain the indication bit location corresponding to the first bit bit according to the preset ID of the device according to the device ID
  • the third terminal may obtain the corresponding indication according to the preset rule mapping according to the device ID.
  • the domain location is the second bit, and the second terminal and the third terminal may check the first bit bit and the second bit bit in the corresponding indication field in the DCI for scheduling the SC-MTCH.
  • the indication information indicates that the terminal device has a paging on the paging occasion PO in the preset time-frequency resource, so the terminal device may stop at the corresponding paging occasion PO.
  • FIG. 24 only shows that the DCI of the scheduling SC-MTCH includes 3 bits to indicate whether the terminal device is paged, but this The embodiment of the invention is not limited thereto.
  • At least one bit may be added to the DCI of the SC-MTCH, and the position of each bit in the at least one bit may correspond to different terminal devices by using a preset rule, for example, as shown in FIG.
  • the bit of the 0th bit of the 3 bits in the DCI for scheduling the SC-MTCH is used to indicate the device identifier of the first terminal device, and the bit of the 2nd bit is used to indicate the device identifier of the third terminal device.
  • the same method can be used to indicate the DCI of the SC-MCCH. For brevity, no further details are provided herein.
  • the bit position of at least one bit in the DCI may also correspond to an index number of a different time-frequency resource.
  • the bit of the 0th bit may correspond to a time-frequency resource whose resource number index value is 0, and the bit of the first bit may correspond to a time-frequency resource whose resource number index value is 1, for which the present invention does not Make a limit.
  • the location of the bit in at least one bit in the DCI for scheduling the SC-MCCH or the SC-MTCH may be associated with the different resource index numbers by using a modulo mapping.
  • the indication domain of at least one bit in the DCI of the scheduling SC-MTCH may also establish a correspondence relationship with different resource blocks by using other rules, which is not limited by the present invention, for example,
  • the correspondence between at least one bit in the DCI and different resource blocks may be set according to a hash value of the device identification ID of the terminal device.
  • the manner in which the indication information is included in the DCI of the scheduling SC-MTCH may be the same as the manner in which the DCI in the scheduling SC-MTCH includes the indication information.
  • the DCI in the scheduling SC-MTCH includes the indication information.
  • the DCI when the terminal device monitors the DCI of the scheduled MCCH in the search space of the PDCCH, the DCI includes whether the paging occasion PO of the terminal device in the preset time-frequency resource is paged. .
  • the preset time-frequency resource may be the next MP of the SC-MCCH modification period ("MP") where the terminal device receives the current multicast service.
  • MP SC-MCCH modification period
  • the preset time-frequency resource may be a paging message corresponding to a paging occasion of the next RP in the next SC-MCCH where the terminal device receives the current multicast service.
  • the time-frequency resource that the DCI used to schedule the paging message may occupy.
  • the multicast-based wireless communication method of the embodiment of the present invention is described in detail above from the terminal device side.
  • the multicast-based wireless communication method of the embodiment of the present invention will be described in detail below from the base station side.
  • FIG. 25 shows a multicast-based wireless communication method of the present invention, the method comprising:
  • the base station generates downlink control information DCI, where the DCI is used to schedule a multicast service channel MTCH or a multicast control channel (MCCH), where the DCI includes indication information, where the indication information is used to indicate whether there is a search in the preset time-frequency resource. call;
  • DCI downlink control information
  • MTCH multicast service channel
  • MCCH multicast control channel
  • the base station sends the DCI to the terminal device.
  • the DCI of the scheduling SC-MTCH and the SC-MCCH generated by the base station includes indication information, where the indication information is used to indicate whether the terminal device is paged in the preset time-frequency resource, and the terminal device is prevented from being pre-prescribed.
  • the base station in the time-frequency resource does not have a paging message for the mobile terminal, the mobile terminal still stops receiving the MCCH or the MTCH and has a large impact on the multicast service.
  • the indication information is used to indicate whether the terminal device has a paging on the PO in the preset time-frequency resource.
  • the multicast-based wireless communication method of the embodiment of the present invention is described in detail above, and the multicast-based wireless communication device of the embodiment of the present invention will be described in detail below.
  • FIG. 26 shows a terminal device 1500 according to an embodiment of the present invention.
  • the terminal device 1500 includes:
  • the receiving module 1510 is configured to receive downlink control information DCI sent by the base station, where the DCI is used to schedule the MTCH or the MCCH, where the DCI includes indication information, where the indication information is used to indicate that the terminal device is preset. Whether there is paging in the time-frequency resource;
  • the processing module 1520 is configured to: when the terminal device determines that no paging is scheduled in the preset time-frequency resource, the terminal device does not monitor the search space of the corresponding paging in the preset time-frequency resource. Or when the terminal device determines that there is a paging in the preset time-frequency resource, and the terminal device has at least one paging opportunity in the preset time-frequency resource, the terminal device is in the The paging opportunity listens to the search space corresponding to the paging, and stops receiving the MTCH or the MCCH.
  • the embodiment of the present invention indicates, by using the indication information included in the DCI of the scheduling MTCH or the MCCH, whether the terminal device has a paging in the preset time-frequency resource, and if there is no paging in the preset time-frequency resource, the terminal device
  • the search space of the corresponding paging is not monitored in the preset time-frequency resource, and the terminal device does not receive the paging message of the terminal device at the target paging moment, but continues to monitor
  • the search space of the SC-MTCH or the search space of the SC-MCCH continues to receive the SC-MTCH or the SC-MCCH, avoiding that the mobile terminal still stops receiving the SC when there is no paging message for the mobile terminal at the target paging moment PO.
  • -MCCH or SC-MTCH has a large impact on multicast services.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is a time period occupied by the terminal device to receive the SC-MTCH or the SC-MCCH.
  • the time-frequency resource used to send the page is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is a time period occupied by the terminal device to receive the SC-MTCH or the SC-MCCH.
  • FIG. 27 shows a base station 1600, which may be a base station in communication with a terminal device, the base station 1600 comprising:
  • the processing module 1610 is configured to generate downlink control information DCI, where the DCI is used to schedule a multicast service channel MTCH or a multicast control channel (MCCH), where the DCI includes indication information, where the indication information is used to indicate a preset time-frequency resource. Whether there is paging;
  • the sending module 1620 is configured to send the indication information to the terminal device.
  • the DCI of the scheduling SC-MTCH and the SC-MCCH generated by the base station includes indication information, where the indication information is used to indicate whether the terminal device is paged in the preset time-frequency resource, and the terminal device is prevented from being pre-prescribed.
  • the base station in the time-frequency resource does not have a paging message for the mobile terminal, the mobile terminal still stops receiving the MCCH or the MTCH and has a large impact on the multicast service.
  • FIG. 28 shows a terminal device 1700 according to an embodiment of the present invention.
  • the terminal device 1700 includes a receiver 1730, a processor 1710, a transmitter 1720, a memory 1740, and a bus system 1750.
  • the receiver 1730, the processor 1710, the transmitter 1720 and the memory 1740 are connected by a bus system 1750 for storing instructions, and the processor 1710 is configured to execute instructions stored by the memory 1740 to control the receiver 1730.
  • a signal is received and the transmitter 1720 is controlled to send an instruction.
  • the receiver 1730 is configured to receive downlink control information DCI sent by the base station, where the DCI is used to schedule the MTCH or the MCCH, where the DCI includes indication information, where the indication information is used to indicate that the terminal device presets Whether there is paging in the time-frequency resource;
  • the processor 1710 is configured to: when the terminal device determines that no paging is scheduled in the preset time-frequency resource, the terminal device stops monitoring the corresponding paging in the preset time-frequency resource. a space; or when the terminal device determines that there is a paging in the preset time-frequency resource, and the terminal device has at least one paging opportunity PO in the preset time-frequency resource, the terminal The device listens to the search space corresponding to the paging on the paging opportunity, and stops receiving the MTCH or the MCCH. .
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is occupied by an SC-MTCH or an SC-MCCH scheduled by the DCI.
  • the time-frequency resource used to send the page during the time period is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is occupied by an SC-MTCH or an SC-MCCH scheduled by the DCI.
  • the memory 1740 can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 1710 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • FIG. 29 shows a base station 1800 according to an embodiment of the present invention.
  • the base station 1800 includes a receiver 1830, a processor 1810, a transmitter 1820, a memory 1840, and a bus system 1850.
  • the receiver 1830, the processor 1810, the transmitter 1820, and the memory 1840 are connected by a bus system 1850 for storing instructions, and the processor 1810 is configured to execute instructions stored by the memory 1840 to control the receiver 1830.
  • a signal is received and the transmitter 1820 is controlled to send an instruction.
  • the processor 1810 is configured to generate downlink control information DCI, where the DCI is used to schedule a multicast service channel MTCH or a multicast control channel (MCCH), where the DCI includes indication information, where the indication information is used to indicate a preset time-frequency resource. Whether there is a page within;
  • the transmitter 1820 is configured to send the DCI to the terminal device.
  • the preset time-frequency resource is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is occupied by an SC-MTCH or an SC-MCCH scheduled by the DCI.
  • the time-frequency resource used to send the page during the time period is a time-frequency resource used for sending a paging in a preset period; or the preset time-frequency resource is occupied by an SC-MTCH or an SC-MCCH scheduled by the DCI.
  • the memory 1840 can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 1810 can be configured to execute instructions stored in a memory, and when the processor executes the instructions, the processor can perform various steps and/or processes corresponding to the terminal devices in the above method embodiments.
  • FIG. 30 shows a multicast-based wireless communication method provided by an embodiment of the present invention, which may be The present invention is applied to the communication system described in FIG. 1, but the embodiment of the present invention is not limited thereto.
  • the method includes:
  • the terminal device receives the downlink control information DCI sent by the base station, where the DCI is used to schedule the current multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the current MTCH changes during the indication change period MP. ;
  • S3020 The terminal device acquires configuration information of the current MTCH after the change according to the indication information.
  • the terminal device receives the DCI sent by the base station to schedule the current MTCH, and obtains the multicast service data that is carried in the MTCH based on the DCI.
  • the solution of the embodiment of the present invention is added in the DCI.
  • the indication information indicates whether the configuration information of the current MTCH changes. That is, the terminal device does not need to detect the search space of the MCCH or receive the MCCH to know whether the configuration information of the current MTCH changes, thereby determining whether it is necessary to re-acquire the changed information. Configuration information increases the flexibility of the system.
  • the configuration information of the MTCH may include configuration information of a PDCCH search space of the MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the MTCH may further include other information, for example, may include at least one of the following: the configuration information of the DRX of the MTCH, and the G corresponding to the session session ID of the MTCH.
  • the RNTI, the MTCH scheduling information, the neighboring cell information, and the like are not limited in this embodiment of the present invention.
  • the embodiment of the present invention is applicable to the processing of the multicast service, and the multicast service may be, for example, a multimedia broadcast multicast service (MBMS) and/or a multicast service in the SC-PTM.
  • MBMS multimedia broadcast multicast service
  • SC-MTCH MTCH and SC-MTCH, MCCH and SC-MCCH are interchangeable unless otherwise specified.
  • the indication change period is a certain change period determined according to the indication information. For example, if the indication information is 2 bits, then "01" indicates that the configuration information of the current MTCH changes in the next MP (ie, the first MP after the MP), and “10” indicates that the configuration information of the current MTCH is in the present The second MP after the MP changes, and "11” indicates that the configuration information of the current MTCH changes after the third MP of the MP, and "00" indicates that the configuration information of the current MTCH is after the MP. No changes occurred in the three MPs.
  • the above 2-bit coding schemes may be interchanged, and the present invention is not limited to the corresponding modes in this example.
  • a terminal device with a simple functional structure for example, a smart water meter or an electric meter
  • the terminal device cannot receive the SC-MCCH at the same time when receiving the current SC-MTCH (or cannot detect other search spaces, such as the search space of the SC-MCCH).
  • the terminal device can monitor the DCI for scheduling the current SC-MTCH in the corresponding search space according to the configuration information of the already obtained multicast service, and the terminal device according to the scheduling SC-
  • the DCI of the MTCH receives the SC-MTCH sent by the base station.
  • the DCI of the scheduling SC-MTCH may include indication information, where the indication information is used to indicate that the configuration information of the current SC-MTCH indicates that the MP changes.
  • the configuration information of the SC-MTCH may include configuration information of a search space for scheduling the SC-MTCH. It should be understood that, in the embodiment of the present invention, the configuration information of the SC-MTCH may further include other information, for example, may include at least one of the following information: configuration information of the DRX of the SC-MTCH, the SC-MTCH The G-RNTI corresponding to the session session ID, the SC-MTCH scheduling information, the neighbor cell information, and the like.
  • the terminal device may determine the G-RNTI corresponding to the session ID according to the session session ID of the current multicast service, according to the current multicast service that has been obtained.
  • the DCI may include indication information, where the indication information is used to indicate that the configuration information of the current SC-MTCH indicates that the MP changes.
  • the indication information in the DCI may be a 2-bit indication field in the DCI, and when the indication field is “01”, the configuration information of the current MTCH is changed in the next MP (ie, The first MP after the MP, "10” indicates that the configuration information of the current MTCH changes in the second MP after the MP, and "11” indicates that the configuration information of the current MTCH is the third after the MP.
  • the MP changes, and "00" indicates that the configuration information of the current MTCH does not change in the three MPs after the MP.
  • the above 2-bit coding schemes may be interchanged, and the present invention is not limited to the corresponding modes in this example. .
  • the indication information in the DCI of the current SC-MTCH is used to indicate that the configuration information of the current SC-MTCH is changed in the indication MP, and the indication information may be carried in at least one of the DCIs.
  • the DCI of the scheduling SC-MTCH may include 3 bits, and the binary combination of any bit of the 3 bits may indicate the current The SC-MTCH indicates that the MP has changed.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated in a manner of implicit or explicit indication, which is not limited by the embodiment of the present invention.
  • the change period MP may refer to the change period MP of the MCCH as shown in FIG. 4, or may also refer to the SC-MTCH configuration information change period MP defined by the SC-MTCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be equal to the MCCH change period or a multiple of the MCCH change period.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be configured through a system message or configured in the SC-MCCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be independently configured for each MTCH, or all SC-MTCHs in one cell may use the same SC-MTCH configuration information change period MP.
  • FIG. 31 is a schematic diagram of receiving a multicast service by a terminal device according to an embodiment of the present invention.
  • the embodiment of the present invention takes the NB-IoT system as an example, but is also applicable to other communication systems. Therefore, although the embodiment of the present invention uses the NPDSCH and the NPDCCH to describe the physical layer channel, it may also be replaced with the corresponding physical layer channel of the system, such as the PDSCH and the PDCCH.
  • the SC-MTCH carrying the multicast service and the SC-MCCH carrying the multicast service configuration information are sent on the NPDSCH, and the SC-MCCH and the SC-MTCH are scheduled to be transmitted through the DCI carried on the NPDCCH.
  • different search spaces may be defined for SC-MTCH and SC-MCCH, and the DCI formats for scheduling SC-MTCH and SC-MCCH may be different. It can be seen from FIG. 4 that the DCIs of the scheduled SC-MTCH and SC-MCCH are respectively transmitted in the search space of the SC-MTCH and the SC-MCCH. It should be understood that, as a specific implementation manner, the search space of the SC-MTCH and the search space of the SC-MCCH may be matched to be coincident.
  • the terminal device may not receive the SC-MCCH carried on the NPDSCH or the SC-MCCH for scheduling the SC-MCCH in the process of receiving the current SC-MTCH or monitoring the DCI of the NPDSCH for the SC-MTCH in the search space of the NPDCCH.
  • the listening space in the search space is used to carry the DCI of the NPDSCH of the SC-MCCH.
  • the terminal device in the process of receiving the current SC-MTCH, the terminal device adds indication information to the DCI that is used to carry the NPDSCH of the SC-MTCH, and the indication information may indicate the multicast service corresponding to the current SC-MTCH. Configuration letter The information changes in the indication MP.
  • the terminal device stops receiving the current SC-MTCH in the indication MP, and is used to schedule the NPDSCH carrying the SC-MCCH.
  • the DCI of the scheduling SC-MCCH is monitored in the search space, and the SC-MCCH is reacquired according to the DCI, and the configuration information after the multicast service change is obtained according to the SC-MCCH.
  • the indication information may further indicate that the configuration information of the current SC-MTCH indicates that the MP has not changed.
  • the terminal device can continue to listen to the relevant search space and receive the current SC-MTCH according to the configuration information of the current SC-MTCH.
  • the indication information in the DCI of the scheduling current MTCH may also be used to indicate that configuration information of other MTCHs in the current cell indicates that the MP changes. Therefore, the terminal device receiving the current multicast can determine whether to re-read the current cell multicast configuration information according to its implementation, thereby improving system flexibility.
  • the other MTCH may be other MTCHs in the current cell than the current MTCH that the terminal device is receiving.
  • Other MTCHs may be MTCHs that are not used by the terminal device.
  • the terminal device only needs to detect the search space corresponding to the MTCH of the multicast service that it is receiving, and can directly learn the configuration of the current multicast service from the indication information of the DCI sent in the search space. Whether the information has changed or not, it is also known whether the configuration information of other MTCH has changed. Therefore, the terminal device does not need to read the additional DCI to determine whether it is necessary to re-acquire the changed configuration information according to the indication information, thereby improving the flexibility of the system.
  • the terminal device receives the DCI for scheduling the current SC-MTCH sent by the base station in the process of receiving the current multicast service
  • the indication information in the DCI may also be used to indicate other SC-MCTH.
  • the configuration information indicates that the MP has changed.
  • an indication field of at least one bit may be introduced in the DCI. When the value of the indication field is 1, the indication information indicates that the configuration information of the other SC-MTCH indicates that the MP changes, and when the value of the indication field is 0, the The indication information indicates that the configuration information of the other MTCH indicates that the MP has not changed.
  • the terminal device can determine, according to the indication information, whether the changed configuration information needs to be re-acquired, thereby improving the flexibility of the system.
  • the indication MP can be pre-specified, such as the first MP after the current MP.
  • the DCI may further include an indication domain of 2 bits,
  • the indication field is "01” indicating that the configuration information of the other MTCH changes in the next MP (ie, the first MP after the MP)
  • "10” indicates that the configuration information of the other MTCH is the second after the MP.
  • the MP changes the "11” indicates that the configuration information of the other MTCH changes in the third MP after the MP, and the "00” indicates that the configuration information of the other MTCH is not in the three MPs after the MP.
  • a change has occurred.
  • the above 2-bit coding schemes may be interchanged, and the present invention is not limited to the corresponding modes in this example.
  • the indication information included in the DCI scheduling the current SC-MTCH may also be indicated by any binary combination of 3 bits.
  • the above is only a specific implementation manner of the present invention, but the embodiment of the present invention is not limited thereto.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated in a manner of implicit or explicit indication, which is not limited by the embodiment of the present invention.
  • the configuration information of other MTCHs in the cell is changed, including: the existing multicast service in the cell (which may be any existing in the cell except the current multicast service of the terminal device).
  • the configuration information of the multicast service changes, new multicast services are added in the cell, or existing multicast services are deleted.
  • the configuration information of the current multicast service and the configuration information of other MTCHs are carried in the SC-MCCH logical channel, which is carried on the NPDSCH and scheduled by the DCI.
  • the DCI can be sent in a preset or pre-configured search space, and CRC masking can be performed by a preset UEID, such as SC-RNTI.
  • the terminal device may monitor the DCI of the scheduled SC-MCCH on the NPDCCH according to the indication information, and send the base station according to the DCI. SC-MCCH.
  • the current cell multicast configuration information is included in the SC-MCCH, and the current cell multicast configuration information includes configuration information of at least one SC-MTCH.
  • These SC-MTCHs are multicast services that are being multicast in a cell.
  • the terminal can obtain the current SC-MTCH configuration information and other multicast configuration information of the SC-MTCH being multicasted by re-acquiring the current cell multicast configuration information.
  • the indication information included in the DCI for scheduling the current SC-MTCH is further used to indicate that the current cell multicast configuration information changes in the indication MP.
  • the current cell multicast configuration information is at least one of the cells.
  • the configuration information of the MTCH may include at least one of the following: the configuration information of the search space of the MTCH, the configuration information of the DRX of the MTCH, the G-RNTI corresponding to the session session ID of the MTCH, and the MTCH scheduling.
  • the information and the neighboring cell information and the like are not specifically limited in this embodiment of the present invention.
  • the change of the current cell multicast configuration information may include at least one of the following: the configuration information of the existing MTCH of the cell is changed, the MTCH is added in the cell, and the existing MTCH is deleted.
  • the terminal device can learn that the current cell multicast configuration information changes in the indication MP by scheduling the indication information in the DCI of the current SC-MTCH in the process of receiving the current SC-MTCH.
  • a 2-bit indication field may be introduced in the DCI that schedules the current SC-MTCH, and when the indication field is “01”, the current cell multicast configuration information is changed in the next MP (ie, the first MP after the MP).
  • "10” indicates that the current cell multicast configuration information changes after the second MP of the MP
  • "11" indicates that the current cell multicast configuration information changes after the third MP of the MP
  • is " 00” indicates that the current cell multicast configuration information does not change in the three MPs after the current MP.
  • the above 2-bit coding schemes may be interchanged, and the present invention is not limited to the corresponding modes in this example.
  • FIG. 31 only shows the case where the indication field is "01".
  • the indication information in the DCI scheduling the current SC-MTCH may also use any binary combination of 3 bits to indicate the addition of the SC-MTCH in the current cell and/or the deletion of the existing SC-MTCH.
  • the above is only a specific implementation manner of the embodiment of the present invention, but the embodiment of the present invention is not limited thereto.
  • the indication information may be carried in an existing field of the DCI that schedules the current SC-MTCH, or a new field for carrying the indication information may be added to the DCI;
  • the indication information may be indicated in a manner of implicit or explicit indication, which is not limited by the embodiment of the present invention.
  • the change period MP may refer to the change period MP of the MCCH in FIG. 31, or may also refer to the SC-MTCH configuration information change period MP defined by the SC-MTCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be equal to the MCCH change period or a multiple of the MCCH change period.
  • the SC-MTCH configuration information change period defined for the SC-MTCH The MP can be configured through system messages or configured in the SC-MCCH.
  • the SC-MTCH configuration information change period MP defined for the SC-MTCH may be independently configured for each MTCH, or all SC-MTCHs in one cell may use the same SC-MTCH configuration information change period MP.
  • the method further includes:
  • S3201 The terminal device monitors a search space for scheduling DCI of the current MTCH on the physical downlink control channel, and does not monitor a search space of the DCI that schedules the MCCH.
  • the terminal device before receiving the downlink control information DCI sent by the base station, the terminal device monitors the search space for scheduling the DCI of the current SC-MTCH on the NPDCCH without listening to the DCI of the scheduled SC-MCCH. Search space.
  • steps S3210 and S3220 refer to S3010 and S3020 in the previous method embodiment.
  • the multicast-based wireless communication method of the embodiment of the present invention is described in detail from the terminal device side with reference to FIG. 30 to FIG. 32.
  • the multicast-based wireless communication method according to the embodiment of the present invention is described in detail below from the base station side with reference to FIG. . It should be understood that the description on the base station side corresponds to the description on the terminal device side, and a similar description can be referred to above.
  • a multicast-based wireless communication method includes:
  • the base station generates downlink control information DCI, where the DCI is used to schedule a first multicast service channel MTCH, where the DCI includes indication information, where the indication information is used to indicate that the configuration information of the MTCH changes during the indication change period MP.
  • the base station sends the DCI to the terminal device.
  • the base station adds the indication information to the DCI that schedules the MTCH, and the indication information is used to indicate that the configuration information of the MTCH is changed, so the terminal device only needs to detect the MTCH corresponding to the multicast service that it is receiving. Space, and from the indication information of the DCI sent in the search space, the configuration information of the current multicast service may be directly changed, and the additional DCI may be read to determine whether the change needs to be re-acquired according to the indication information. After the configuration information, the flexibility of the system is improved.
  • the configuration information of the MTCH may include configuration information of a PDCCH search space of the MTCH.
  • the configuration information of the MTCH may further include other information, for example, may include at least one of the following information: configuration information of the DRX of the MTCH, the The G-RNTI corresponding to the session ID of the MTCH, the MTCH scheduling information, the neighboring cell information, and the like are not specifically limited in this embodiment of the present invention.
  • the content of the embodiment of the present invention is mainly applicable to the multicast service, including the Multimedia Broadcast Multicast Service (MBMS) MBMS and the SC-PTM. Therefore, in the embodiment of the present invention, unless otherwise specified.
  • MBMS Multimedia Broadcast Multicast Service
  • SC-MTCH MCCH and SC-MCCH are interchangeable.
  • the base station generates downlink control information DCI, where the DCI includes indication information, and the indication information may be specifically used to indicate that the configuration information of the SC-MTCH indicates that the MP changes.
  • the indication information can be carried in the 2 bits of the DCI.
  • the specific implementation refer to the description of the terminal device. For brevity, details are not described herein.
  • the indication information included in the DCI for scheduling the SC-MTCH is further used to indicate that the configuration information of the second SC-MTCH indicates that the MP changes.
  • the indication information may be carried in the at least one bit in the DCI.
  • the second SC-MTCH may be an SC-MTCH other than the first SC-MTCH currently being received in the current cell, for example, may be the first SC-before being received. All SC-MTCHs except MTCH.
  • the indication information in the DCI used for scheduling the SC-MTCH may also be used to indicate that the current cell multicast configuration information changes in the indication MP.
  • the indication information may be carried in the at least one bit in the DCI.
  • the current cell multicast configuration information is a set or list of configuration information of the multicast service channel MTCH included in the cell.
  • the configuration information of the MTCH may include at least one of the following information: configuration information of the search space of the MTCH, configuration information of the DRX of the MTCH, G-RNTI corresponding to the session ID of the MTCH, and the MTCH scheduling information and
  • the neighboring cell information and the like are not specifically limited in this embodiment of the present invention.
  • the change of the current cell multicast configuration information includes at least one of the following: the configuration information of the existing multicast service of the current cell is changed, the new multicast service is added in the cell, or the existing multicast service in the cell is deleted.
  • the NB-IoT terminal in the idle state receives the multicast service, and each time it reaches its own paging moment (Paging Occasion, referred to as "PO"), such as If it is receiving a Single Cell Multicast Control Channel (“SC-MCCH”) or a Single Cell Multicast Traffic Channel (SC-MTCH) SC-MTCH, if Each time the NB-IoT terminal preferentially receives the paging message at the paging moment, the terminal device will stop receiving the SC-MCCH or SC-MTCH currently being received, and in the public search space corresponding to the paging (Common Search Space, It is referred to as "CSS" for short to detect whether it is paged.
  • PSS Common Search Space
  • the terminal device stops receiving the SC-MCCH or SC-MTCH currently being received every time it reaches its own PO, and receives the paging information that may exist on the PRB where the paging message is located, this will be currently
  • the received multicast service has a large impact: multicast packets that overlap with the paging in time will be discarded because they cannot be received, thus affecting the reliable propagation of multicast services.
  • the terminal device does not detect the DCI of the scheduled paging message on the corresponding PO every time the terminal device receives the Single Cell Multicast Traffic Channel (SC-MTCH) SC-MTCH. And read the corresponding paging message, which will cause the network to be unable to contact the terminal and perform the necessary communication process. For some types of business, this will be intolerable or have a large impact on the user experience. For example, for the meter reading service, when some users are in arrears, the gas or electric power company will temporarily stop the gas supply or electric service of the user, and the gas or electric service will not be restored until the user pays the fee.
  • SC-MTCH Single Cell Multicast Traffic Channel
  • the NB-IoT system may use the multicast SC-PTM to perform software or firmware upgrades on the terminal devices. Therefore, the NB-IoT device may perform software upgrades for a certain period of time. If the network-initiated paging message cannot be received during the multicast process of receiving the software upgrade package, the network cannot recharge the restored gas meter or the meter in time and resume the service, thereby seriously affecting the user experience.
  • the present invention provides a multicast-based wireless communication method to indicate whether a terminal needs to be received in a multicast process for different situations.
  • FIG. 34 shows another multicast-based wireless communication method according to an embodiment of the present invention, the method comprising:
  • the terminal device receives the indication information sent by the base station, where the indication information is used to indicate whether the terminal device receives the paging message in the process of receiving the multicast service channel SC-MTCH.
  • S3420 If the terminal device determines, according to the indication information, that a multicast traffic channel is received. During the process of the SC-MTCH, the terminal device does not receive the paging space of the corresponding paging and does not receive any paging message during the process of receiving the multicast traffic channel SC-MTCH; if the terminal device determines that Receiving a paging message in the process of receiving the multicast traffic channel SC-MTCH, the terminal device listening to the paging space corresponding to the paging on the paging opportunity of the terminal in the process of receiving the multicast traffic channel SC-MTCH , stop receiving the MTCH.
  • the embodiment of the present invention indicates, by using the indication information, whether the terminal device receives the paging in the process of receiving the multicast service channel SC-MTCH: if the terminal device determines that the paging message is not received during the process of receiving the multicast service channel SC-MTCH The terminal device does not listen to the search space of the corresponding paging and does not receive any paging message during the process of receiving the multicast traffic channel SC-MTCH, but continues to monitor the search space of the SC-MTCH, and according to the DCI corresponding to the SC-MTCH Continuing to receive the SC-MTCH; if the terminal device determines to receive the paging message in the process of receiving the multicast traffic channel SC-MTCH, the terminal device is on the paging opportunity of the terminal in the process of receiving the multicast traffic channel SC-MTCH The search space corresponding to the paging is monitored, and the reception of the MTCH is stopped.
  • the method so that the base station can indicate, by using the indication information, whether the terminal receives the paging message in the process of receiving the SC-MTCH: when the base station can implement the scheduling or private implementation, the paging message of the terminal and the search for paging can be guaranteed.
  • the base station may send an indication message indicating that the terminal device receives the paging message in the process of receiving the multicast service channel SC-MTCH; when the base station cannot guarantee the paging message of the terminal and The search space for paging does not overlap with the SC-MTCH in time, and when the base station considers that the success rate of the multicast service is important, the base station may send an indication message indicating that the terminal device is receiving the multicast service channel SC-MTCH. No paging messages are received. In this way, the base station has higher flexibility and ensures better performance when different service requirements are required.
  • the indication information may be configured for different SC-MTCHs respectively, or may be configured for SC-MTCHs being transmitted in all cells; the indication information may be sent in a system message or sent in the SC-MCCH. .
  • the terminal device when the paging opportunity or paging message of the terminal device overlaps with the multicast control channel SC-MCCH in time, the terminal device always preferentially monitors the paging occasion or receives the paging message, and gives up receiving the overlapping SC- MCCH.
  • FIG. 35 shows another multicast-based wireless communication method according to an embodiment of the present invention, the method comprising:
  • the base station generates indication information, where the indication information is used to indicate that the terminal device is in the receiving group. Whether to receive a paging message during the process of broadcasting the traffic channel SC-MTCH;
  • the base station sends the indication message to the terminal device.
  • the base station generates indication information, which is used to indicate whether the terminal device receives the paging message in the process of receiving the multicast service channel SC-MTCH. If the indication information indicates that the terminal device does not receive the paging in the process of receiving the multicast service channel SC-MTCH, the terminal device that receives the indication information does not receive the paging message during the process of receiving the multicast service channel SC-MTCH.
  • the terminal device When receiving the multicast service channel SC-MTCH, the terminal device does not listen to the search space of the corresponding paging and does not receive any paging message, but continues to monitor the search space of the SC-MTCH, and continues according to the DCI corresponding to the SC-MTCH.
  • the terminal device receiving the indication information is in the process of receiving the multicast service channel SC-MTCH.
  • the paging opportunity of the terminal monitors the search space corresponding to the paging, and stops receiving the MTCH.
  • the method so that the base station can indicate, by using the indication information, whether the terminal receives the paging message in the process of receiving the SC-MTCH: when the base station can implement the scheduling or private implementation, the paging message of the terminal and the search for paging can be guaranteed.
  • the base station may send an indication message indicating that the terminal device receives the paging message in the process of receiving the multicast service channel SC-MTCH; when the base station cannot guarantee the paging message of the terminal and The search space for paging does not overlap with the SC-MTCH in time, and when the base station considers that the success rate of the multicast service is important, the base station may send an indication message indicating that the terminal device is receiving the multicast service channel SC-MTCH. No paging messages are received. In this way, the base station has higher flexibility and ensures better performance when different service requirements are required.
  • the indication information may be configured for different SC-MTCHs respectively, or may be configured for SC-MTCHs being transmitted in all cells; the indication information may be sent in a system message or sent in the SC-MCCH. .
  • the terminal device when the paging opportunity or paging message of the terminal device overlaps with the multicast control channel SC-MCCH in time, the terminal device always preferentially monitors the paging occasion or receives the paging message, and gives up receiving the overlapping SC- MCCH.
  • the embodiment of the present invention further provides a corresponding device, such as a base station device corresponding to the base station method embodiment or a terminal device device corresponding to the terminal device method embodiment, Species
  • the apparatus includes modules for performing the above corresponding method steps. The functions performed by the respective modules are not described herein. Please refer to the previous method embodiments.
  • FIG. 30 and FIG. 32 to FIG. 35 may be performed by the hardware device corresponding to FIG. 9 or FIG. 10 .
  • the execution process of the specific hardware device is not described in detail, and the previous embodiment may be referred to.
  • the indication MP involved in the above embodiment may be the target MP, and the target MP may be any MP after the current MP or the current MP.
  • the processor may be a central processing unit (CPU), and the processor may also be other general purpose processors, digital signal processors (DSPs), and application specific integrated circuits (ASICs). Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of each method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division, and the actual implementation may have another The manner of division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or a CD.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

本发明实施例提供了基于组播的无线通信方法、终端设备和基站，该方法包括：终端设备在接收当前组播业务的过程中，接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，用于指示该MTCH的配置信息在下一变更周期MP或当前MP发生改变；该终端设备根据该指示信息获取变更后的配置信息。本发明实施例提高了系统的灵活性。

Description

基于组播的无线通信方法、终端设备和基站 技术领域
本发明涉及通信领域，尤其涉及基于组播的无线通信方法和终端设备和基站。
背景技术
机器类型通信(Machine Type Communication，简称“MTC”)又称为机器间通信(Machine To Machine，简称“M2M”)，或者物联网(Intent of Things，简称“IoT”)将是未来通信领域的一项重要应用。未来IoT通信将主要可能涵盖智能抄表、医疗检测监控、物流检测、工业检测监控、汽车联网、智能社区以及可穿戴设备通信等。
在IoT系统中，一类重要的IoT通信系统是基于现有蜂窝架构的通信系统，这类通信系统可以称为蜂窝(Cellular)IoT。在这种通信系统中，MTC基站终端设备之间一般不需要非常高的数据传输速率，但该MTC需要很大的覆盖面积。因此，在一个MTC基站下可能存在大量的终端设备，该终端设备可以涵盖智能水或电表、智能社区、监控、汽车、可穿戴终端设备等各种类型的终端设备。该类型的终端设备在与MTC基站进行通信过程中，对于功耗和终端设备成本的要求较高，因此终端设备的能力往往是受限制的。
在长程演进(Long term Evolution，简称“LTE”)系统中，单小区点对多点(Single Cell Point-to-Multipoint，简称“SC-PTM”)是一种基于组播的传播技术，在该组播技术中，包括两种逻辑信道：单小区组播控制信道(Single Cell Multicast Control Channel，简称“SC-MCCH”)和单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)。SC-MCCH是控制信道，用于传输终端设备接收SC-MTCH所需的配置信息(即SC-MTCH配置信息)，SC-MTCH是数据信道，用于传输组播中的业务数据。对于IoT系统中能力有限的终端设备，在接收基站发送的SC-MTCH时，往往没有能力同时接收基站发送的SC-MCCH。因此，终端设备接收基站发送的SC-MTCH过程中，无法改变当前正在接收的SC-MTCH的配置信息，从而影响系统的灵活性。
发明内容
本申请提供了一种基于组播的无线通信方法、终端设备和基站，以提高系统的灵活性。
第一方面，提供了一种基于组播的无线通信方法，包括：终端设备接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
该终端设备根据该指示信息获取变更后的当前MTCH的配置信息。终端设备在通过调度当前MTCH的DCI接收该MTCH的过程中，只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息是否发生了改变。因此，终端不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，从而终端设备可以在其接收组播业务的过程中改变当前MTCH的配置信息，提高了系统的灵活性。
结合第一方面，在第一方面的第一种实现方式中，所述方法还包括：根据获取变更后的当前MTCH的配置信息获取所述当前MTCH。
结合第一方面或第一方面的第一种实现方式在第一方面的第二种实现方式中，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
结合第一方面或第一方面的上述实现方式的任一种，在第一方面的第三种实现方式中，该指示信息还用于指示当前小区中其他MTCH的配置信息在所该下一MP或当前MP发生改变。应理解，在本申请中，该当前小区中其他MTCH的配置信息可以为当前小区中除正在接收的当前MTCH之外的MTCH。其他MTCH可以是终端设备没有使用的MTCH。
结合第一方面或第一方面的上述实现方式的任一种，在第一方面的第四种实现方式中，该指示信息还用于指示当前小区组播配置信息在当前MP或下一MP发生改变。应理解，在本申请中，该当前小区组播配置信息可以包括当前小区中已有组播业务信道MTCH的配置信息发生改变，或小区内新增组播业务信道MTCH，或删除已有业务信道MTCH。
结合第一方面或上述实现方式的任一种，在第一方面的第五种实现方式中，该终端设备在接收基站发送的DCI之前，在物理下行控制信道监听用于 调度该当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
第二方面，提供了一种基于组播的无线通信方法，包括：基站生成下行控制信息DCI，该DCI用于调度第一组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该第一MTCH的配置信息在下一变更周期MP或当前MP发生改变；该基站向终端设备发送该DCI。
基站通过调度当前MTCH的DCI向终端设备发送当前MTCH的过程中，本方案在该DCI中添加了指示信息，指示当前MTCH的配置信息发生改变，因此终端设备在通过该DCI获取当前MTCH时，该终端设备无需检测MCCH对应的搜索空间，并通过搜索空间中发送的调度MCCH的DCI获取MCCH就可以获知当前MTCH的配置信息发生改变，这样一来，对于没有能力同时接收MCCH和MTCH的低能力的终端设备而言，终端设备可以在其接收组播业务的过程中改变当前MTCH的配置信息，提高了系统的灵活性。
结合第二方面，在第二方面的第一种实现方式中，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
结合第二方面或第一方面的第一种实现方式，在第二方面的第二种实现方式中，该指示信息还用于指示当前小区中第二MTCH的配置信息在该下一MP或当前MP发生改变。应理解，在本申请中，该当前小区中第二MTCH的配置信息可以为当前小区中除当前接收第一MTCH之外的MTCH的配置信息。
结合第二方面或其上述实现方式中的任一种，在第二方面的第三种实现方式中，该指示信息还用于指示当前小区组播配置信息在当前MP或下一MP发生改变。应理解，在本申请中，该当前小区组播配置信息可以包括当前小区中已有组播业务信道MTCH的配置信息发生改变，或小区内新增组播业务信道MTCH，或删除已有业务信道MTCH。
第三方面，提供了一种基于组播的无线通信方法，包括：终端设备接收基站发送指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；该终端设备根 据该指示信息获取变更后的当前小区组播配置信息。
终端设备在未接收任何组播业务的情况下，只需要检测MCCH对应的搜索空间，并从该搜索空间中获取调度该MCCH的DCI中包含的指示信息，或者检测系统主信息块MIB中包含的指示信息，或者检测用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中包含的指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，降低了终端设备的资源开销，提高系统的灵活性。
结合第三方面，在第三方面的第一种实现方式中，该当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括该每个MTCH的物理下行控制信道PDCCH搜索空间的配置信息。
结合第三方面或第三方面的第一种实现方式，在第三方面的第二种实现方式中，该指示信息还用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
第四方面，提供了一种基于组播的无线通信方法，包括：基站生成指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；该基站向终端设备发送该指示信息。
本方案中，基站生成指示信息，该指示信息可以包含在调度MCCH的DCI中，或者包含在主信息块MIB中，或者包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中，该基站向终端设备发送该指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，提高了系统的灵活性。
结合第四方面，在第四方面的第一种实现方式中，该当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其 中，该集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
结合第四方面或第四方面的第一种实现方式，在第四方面的第二种实现方式中，该指示信息还用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
第五方面，提供了一种基于组播的无线通信方法，包括：终端设备接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中该集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；该终端设备根据该小区组播配置信息获取小区中的MTCH。
结合第五方面，在第五方面的第一种实现方式中，该MTCH的PDCCH搜索空间的配置信息包括下列至少一种：该MTCH的下行物理控制信道候选PDCCH Candidate的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
结合第五方面或第五方面的第一种实现方式，在第五方面的第二种实现方式中，不同MTCH具有不同MTCH搜索空间。
结合第五方面或其上述实现方式的任一种，在第五方面的第三种实现方式中，所述MTCH的配置信息还包括：该MTCH的非连续接收DRX的配置信息和/或该MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
结合第五方面或其上述实现方式的任一种，在第五方面的第四种实现方式中，该小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
第六方面，提供了一种基于组播的无线通信方法，包括：基站生成小区组播配置信息，该小区组播配置信息包括小区内至少一个组播业务信道MTCH的配置信息的集合，该集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；该基站向终端设备发送该小区组播配置信息。
结合第六方面，在第六方面的第一种实现方式中，该MTCH的搜索空间的配置信息包括下列至少一种：该MTCH的下行物理控制信道候选个数 PDCCH Candidate的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
结合第六方面或第六方面的第一种实现方式，在第六方面的第二种实现方式中，不同MTCH具有不同MTCH搜索空间。
结合第六方面或其上述实现方式的任一种，在第六方面的第三种实现方式中，该MTCH的配置信息还包括：该MTCH的非连续接收DRX的配置信息和/或该MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
结合第六方面或其上述实现方式的任一种，在第六方面的第四种实现方式中，该小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
第七方面，提供了一种基于组播的无线通信方法，包括：终端设备在接收组播业务信道MTCH或组播控制信道MCCH的过程中，接收基站发送的下行控制信息DCI，该DCI用于调度该MTCH或该MCCH，该DCI包括指示信息，该指示信息用于指示该终端设备在预设时频资源内是否存在寻呼；如果该终端设备确定在该预设时频资源内不存在寻呼，该终端设备在该预设时频资源内不监听对应寻呼的搜索空间，如果该终端设备确定在该预设时频资源内存在寻呼，且该终端设备在该预设时频资源内存在至少一个寻呼机会时，该终端设备在该寻呼机会上监听对应于寻呼的搜索空间，停止接收该MTCH或该MCCH。
本方案通过在调度MTCH和MCCH的DCI中包括的指示信息来指示该终端设备在预设时频资源内是否存在寻呼，如果在预设时频资源内不存在寻呼，该终端设备在预设时频资源内不监听对应寻呼的搜索空间，避免了终端设备在预设时频资源不存在寻呼时，终端设备需要在寻呼时机(Paging Occasion，PO)停止接收MCCH或MTCH而对组播业务传输造成的影响。
结合第七方面，在第七方面的第一种实现方式中，该预设时频资源为预设周期内用于发送寻呼的时频资源，或，该DCI调度MTCH或MCCH占用时间内用于发送寻呼的时频资源。
第八方面，提供了一种基于组播的无线通信方法，包括：基站生成下行控制信息DCI，该DCI用于调度组播业务信道MTCH或组播控制信道MCCH，该DCI包括指示信息，该指示信息用于指示预设时频资源内是否存 在寻呼；该基站向该终端设备发送该DCI。
本方案中，基站生成的调度MTCH和MCCH的DCI中包括指示信息，该指示信息用于指示该终端设备在预设时频资源内是否存在寻呼，避免了终端设备在预设时频资源内不存在该终端的寻呼时，该终端设备需要在寻呼时机停止接收MCCH或MTCH而对组播业务传输造成的影响。
结合第八方面，在第八方面的第一种实现方式中，该预设时频资源为预设周期内用于发送寻呼的时频资源，或，该DCI调度MTCH或MCCH占用时间内用于发送寻呼的时频资源。
第九方面，提供了一种终端设备，包括用于执行第一方面或第一方面的任意一种实现方式的单元。
第十方面，提供了一种基站，包括用于执行第二方面或第二方面的任意一种实现方式的单元。
第十一方面，提供了一种终端设备，包括用于执行第三方面或第三方面的任意一种实现方式的单元。
第十二方面，提供了一种基站，包括用于执行第四方面或第四方面的任意一种实现方式的单元。
第十三方面，提供了一种终端设备，包括用于执行第五方面或第五方面的任意一种实现方式的单元。
第十四方面，提供了一种基站，包括用于执行第六方面或第六方面的任意一种实现方式的单元。
第十五方面，提供了一种终端设备，包括用于执行第七方面或第七方面的任意一种实现方式的单元。
第十六方面，提供了一种基站，包括用于执行第八方面或第八方面的任意一种实现方式的单元。
第十七方面，提供了一种终端设备，该终端设备包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第一方面或第一方面的任意一种实现方式中的方法。
第十八方面，提供了一种基站，该基站包括：接收器、发送器、存储器、 处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第二方面或第二方面的任意一种实现方式中的方法。
第十九方面，提供了一种终端设备，该终端设备包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第三方面或第三方面的任意一种实现方式中的方法。
第二十方面，提供了一种基站，该基站包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第四方面或第四方面的任意一种实现方式中的方法。
第二十一方面，提供了一种终端设备，该终端设备包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第五方面或第五方面的任意一种实现方式中的方法。
第二十二方面，提供了一种基站，该基站包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第六方面或第六方面的任意一种实现方式中的方法。
第二十三方面，提供了一种终端设备，该终端设备包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和 该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第七方面或第七方面的任意一种实现方式中的方法。
第二十四方面，提供了一种基站，该基站包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第八方面或第八方面的任意一种实现方式中的方法。
第二十五方面，提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的计算机程序，该计算机程序包括用于执行第一方面或第一方面的任意一种实现方式中的方法的指令。
第二十六方面，提供了一种计算机可读介质，该计算机可读介质存储用于基站执行的计算机程序，该计算机程序包括用于执行第二方面或第二方面的任意一种实现方式中的方法的指令。
第二十七方面，提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的计算机程序，该计算机程序包括用于执行第三方面或第三方面的任意一种实现方式中的方法的指令。
第二十八方面，提供了一种计算机可读介质，该计算机可读介质存储用于基站执行的计算机程序，该计算机程序包括用于执行第四方面或第四方面的任意一种实现方式中的方法的指令。
第二十九方面，提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的计算机程序，该计算机程序包括用于执行第五方面或第五方面的任意一种实现方式中的方法的指令。
第三十方面，提供了一种计算机可读介质，该计算机可读介质存储用于基站执行的计算机程序，该计算机程序包括用于执行第六方面或第六方面的任意一种实现方式中的方法的指令。
第三十一方面，提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的计算机程序，该计算机程序包括用于执行第七方面或第七方面的任意一种实现方式中的方法的指令。
第三十二方面，提供了一种计算机可读介质，该计算机可读介质存储用于基站执行的计算机程序，该计算机程序包括用于执行第八方面或第八方面的任意一种实现方式中的方法的指令。
第三十三方面，提供了一种基于组播的无线通信系统，包括如第九方面所述的终端设备和第十方面所述的基站。
第三十四方面，提供了一种基于组播的无线通信系统，包括如第十一方面所述的终端设备和第十二方面所述的基站。
第三十五方面，提供了一种基于组播的无线通信系统，包括如第十三方面所述的终端设备和第十四方面所述的基站。
第三十六方面，提供了一种基于组播的无线通信系统，包括如第十五方面所述的终端设备和第十六方面所述的基站。
在某些实现方式中，上述获取或接收MTCH可以指在该MTCH上接收组播数据。
在某些实现方式中，上述获取或接收MCCH可以指在该MCCH上接收组播配置信息，其中该组播配置信息可以是小区中所有组播业务配置信息的集合，也可以是小区中某个组播业务的配置信息。
在某些实现方式中，上述MTCH可以对应一个组播业务。
可选地，该终端设备能够根据该小区组播配置信息获取小区中的MTCH，即获取该MTCH上的组播数据。
本实施例还提供一种基于组播的无线通信方法，包括：终端设备接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在指示变更周期MP发生改变；所述终端设备根据所述指示信息获取变更后的当前MTCH的配置信息。
可选地，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
可选地，所述指示信息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述指示MP发生改变。
可选地，在所述终端设备接收基站发送的DCI之前，所述方法还包括：所述终端设备在物理下行控制信道PDCCH监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
本实施例还提供了一种终端设备，该终端设备包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行之前方法的指令。
本实施例还提供一种基于组播的无线通信方法，包括：基站生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在指示变更周期MP发生改变；所述基站向终端设备发送所述DCI。
可选地，MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
可选地，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述指示MP发生改变。
本实施例还提供了一种基站，该基站包括：接收器、发送器、存储器、处理器和总线系统。其中，该接收器、该发送器、该存储器和该处理器通过该总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行之前方法的指令。
可选地，本发明实施例还提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的计算机程序，该计算机程序包括用于执行之前方法的指令。
本实施例还提供一种基于组播的无线通信的终端设备，包括：第一模块，用于接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在指示变更周期MP发生改变；第二模块，用于根据所述指示信息获取变更后的当前MTCH的配置信息。
可选地，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
可选地，所述指示信息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述指示MP发生改变。
可选地，还包括第三模块，用于在接收基站发送的DCI之前，在物理下行控制信道PDCCH监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
本实施例还提供一种基于组播的无线通信的基站，包括：第一模块，用于生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在指示变更周期MP发生改变；第二模块，用于向终端设备发送所述DCI。
可选地，所述MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
可选地，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述指示MP发生改变。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是能够应用本发明实施例应用的通信系统示意图；
图2是了SC-PTM中逻辑信道与物理信道调度关系示意图；
图3是本发明实施例提供的基于组播的无线通信方法的流程图；
图4是本发明实施例的逻辑信道与物理信道调度关系示意图
图5是本发明实施例提供的另一基于组播的无线通信方法的流程图；
图6是本发明实施例的基于组播的无线通信方法的流程图；
图7是本发明实施例的终端设备的示意性框图；
图8是本发明实施例的基站的示意性框图；
图9是本发明实施例的终端设备的示意性框图；
图10是本发明实施例的基站的示意性框图；
图11是本发明实施例的基于组播的无线通信方法的流程图；
图12是本发明实施例的基于组播的无线通信方法的流程图；
图13是本发明实施例的终端设备的示意性框图；
图14是本发明实施例的基站的示意性框图；
图15是本发明实施例的终端设备的示意性框图；
图16是本发明实施例的基站的示意性框图；
图17是本发明实施例的基于组播的无线通信方法的流程图；
图18是本发明实施例的基于组播的无线通信方法的流程图；
图19是本发明实施例的终端设备的示意性框图；
图20是本发明实施例的基站的示意性框图；
图21是本发明实施例的终端设备的示意性框图；
图22是本发明实施例的基站的示意性框图；
图23是本发明实施例的基于组播的无线通信方法的流程图；
图24是本发明实施例的指示信息指示寻呼的方法的示意图；
图25是本发明实施例的基于组播的无线通信方法的流程图；
图26是本发明实施例的终端设备的示意性框图；
图27是本发明实施例的基站的示意性框图；
图28是本发明实施例的终端设备的示意性框图；
图29是本发明实施例的基站的示意性框图；
图30示出了本发明实施例提供的基于组播的无线通信方法；
图31示出了本发明实施例的终端设备接收组播业务示意图；
图32示出了本发明实施例的终端设备接收组播业务的另一示意图；
图33示出了本发明实施例提供的基于组播的无线通信的另一方法；
图34示出了本发明实施例的另一基于组播的无线通信方法；
图35示出了本发明实施例的另一基于组播的无线通信方法。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。
本发明实施例可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，简称为“GSM”)系统、码分多址(Code Division Multiple Access，简称为“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称为“WCDMA”)系统、通用分组无线业 务(General Packet Radio Service，简称为“GPRS”)、长期演进(Long Term Evolution，简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex，简称为“FDD”)系统、LTE时分双工(Time Division Duplex，简称为“TDD”)、通用移动通信系统(Universal Mobile Telecommunication System，简称为“UMTS”)或全球互联微波接入(Worldwide Interoperability for Microwave Access，简称为“WiMAX”)通信系统或未来的5G系统等。
图1示出了本发明实施例应用的通信系统100。该通信系统100可以包括至少一个网络设备110。网络设备110可以是与终端设备120通信的设备，如基站或基站控制器等。每个网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域(小区)内的终端设备(例如UE)进行通信。该网络设备110可以是GSM系统或码分多址(Code Division Multiple Access，简称为“CDMA”)系统中的基站(Base Transceiver Station，简称为“BTS”)，也可以是WCDMA系统中的基站(NodeB)，还可以是LTE系统中的演进型基站(Evolutional Node B，简称为“eNB”或“eNodeB”)，或者是云无线接入网络(Cloud Radio Access Network，简称为“CRAN”)中的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备、未来5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，简称为“PLMN”)中的网络设备等。
在本发明实施例中，该通信系统100可以是物联网(Internet of Things，简称为“IoT”)，蜂窝IoT(Cellular IoT，简称“CIoT”)系统是基于现有蜂窝网络基础架构的一类重要的机器类型通信(Machine Type Communication，简称为“MTC”)通信系统。未来物联网通信的主要业务范围可能涵盖智能抄表、医疗检测监控、物流检测、工业检测监控、汽车联网、智能社区以及可穿戴设备通信等等。围绕MTC通信构造的物联网产业被认为是信息产业在继计算机、互联网和移动通信网之后的第四次浪潮，是未来网络的发展方向。此外，CIoT系统对网络和终端设备还有大覆盖、高连接数、低成本和低功耗的需求。
该无线通信系统100还包括位于网络设备110覆盖范围内的多个终端设备120。该终端设备120可以是移动的或固定的。该终端设备120可以指接入终端、用户设备(User Equipment，简称为“UE”)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动终端、用户终端、终端、无线通 信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称为“SIP”)电话、无线本地环路(Wireless Local Loop，简称为“WLL”)站、个人数字处理(Personal Digital Assistant，简称为“PDA”)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，简称为“PLMN”)中的终端设备等。
图1示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本发明实施例对此不做限定。
可选地，该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本发明实施例不限于此。
具体地，在系统100中，基站110基于单小区点对多点(Single Cell Point-to Multipoint，简称“SC-PTM”)技术向终端设备120进行组播，即基站110向多个终端设备120发送相同的下行数据，基站110将需要接收下行数据的终端设备120配置为一个组播组，基站110向该组播组发送下行数据，该组播组内的各终端设备都可以接收到该下行数据。在SC-PTM技术中包括两种逻辑信道：单小区组播控制信道SC-MCCH(Single Cell Multicast Control Channel，简称“SC-MCCH”)和单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)，其中该SC-MTCH是组播业务信道，用于传输组播业务数据；而SC-MCCH是控制信道，用于传输UE接收SC-MTCH所必须的控制信息。该两种逻辑信道在物理层均承载在物理下行共享信道上(Physical Downlink Shared Channel，简称“PDSCH”)。基站在向终端设备发送组播业务时，首先向该终端设备发送承载于系统信息块(System Information Block，简称“SIB”)的SC-MCCH的配置信息，作为一个例子，该SC-MCCH的配置信息可以承载在SIB20中，具体地，SIB20中包括的SC-MCCH的配置信息可以包括下列内容中的一种或多种：
(1)SC-MCCH的变更周期(modification period，简称“MP”)，该MP表示SC-MCCH经过多长时间可能发生改变，以帧为单位；
(2)SC-MCCH的重复周期(repetition period，简称“RP”)，该RP表示在一个变更周期内SC-MCCH经过多长时间重复发送一次，以帧为单位；
(3)SC-MCCH的发送子帧，表示在一个帧内，SC-MCCH在具体在哪些特定的子帧上发送；
(4)SC-MCCH的发送偏移，表示在一个变更周期内，SC-MCCH的发送帧相对于周期开始的偏移量。
终端设备根据接收到的SC-MCCH的配置信息获取SC-MCCH，在SC-MCCH中包括了小区组播配置信息，该小区组播配置信息具体表示为SC-MTCH信息表，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合。可选地，该终端设备能够根据该小区组播配置信息获取小区中的SC-MTCH，即获取该SC-MTCH上的组播数据。具体地，该SC-MTCH的配置信息可以包括有下列内容中的一种或多种：
(1)会话信息，该会话信息可以包括会话标识(identification，简称ID)；
(2)组播无线网络临时标识(Group-Radio Network Temporary Identity，简称“G-RNTI”)，该G-RNTI用于对下行控制信息(Downlink Control Information，简称“DCI”)的循环冗余校验(Cyclic Redundancy Check，CRC)部分进行加掩；
(3)SC-MTCH调度信息，该调度信息包括SC-MTCH的接收和休眠等信息；
(4)邻小区信息等，该邻小区信息用于指示相邻小区是否提供该终端设备感兴趣的会话。
在SC-PTM技术中，承载在PDSCH上的SC-MCCH和SC-MTCH可以通过承载在物理下行控制信道(Physical Downlink Control Channel，简称“PDCCH”)中的DCI进行动态调度。图2示出了SC-PTM技术中的逻辑信道和物理信道的调度关系示意图。终端设备在接收SC-MCCH之前，首先要获取SIB20中包括的SC-MCCH配置信息，根据该SC-MCCH配置信息接收调度该SC-MCCH的DCI，根据调度SC-MCCH的DCI接收SC-MCCH，在获取SC-MCCH后，确认该SC-MCCH中包括的会话ID是否有自己感兴趣的业务ID，当确认该SC-MCCH中包括自己感兴趣的会话ID后，开始接收调度SC-MTCH的DCI，根据该调度SC-MCCH的DCI接收SC-MTCH。
本发明实施例中的PDCCH可以是LTE中的PDCCH，或者，NB-IoT中的窄带物理下行控制信息信道(Narrowband Physical Downlink Control Channel，简称“NPDCCH”)，或者eMTC中的机器物理下行控制信息信道 (Machine Physical Downlink Control Channel，简称“MPDCCH”)，或者以上PDCCH的任意组合。为描述方便，本发明实施例描述中仅适用PDCCH或者NPDCCH进行描述，在本文中如无特殊说明，PDCCH、NPDCCH或MPDCCH可以互相替换。
在图2中所示的调度方式中，可以针对SC-MCCH和SC-MCCH定义两种不同的公共搜索空间(Common Search Space，简称“CSS”)，即CSS type1和CSS type2，在调度SC-MCCH和SC-MTCH的PDCCH，可以使用相同的PDCCH DCI格式，而调度SC-MCCH和SC-MTCH的DCI可以分别在定义的SC-MCCH的CSS中和SC-MTCH的CSS中发送。
图3示出了本发明实施例提供的基于组播的无线通信方法，该方法可以应用于图1所述的通信系统，但本发明实施例不限于此。该方法包括：
S310，终端设备接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
S320，该终端设备根据该指示信息获取变更后的当前MTCH的配置信息。
在接收组播业务的过程中，终端设备会接收基站发送的用于调度当前MTCH的DCI，并基于该DCI获取承载在MTCH中的组播业务数据，本发明实施例的方案在该DCI中添加了指示信息，指示当前MTCH的配置信息是否发生改变，也就是说，终端设备无需检测MCCH的搜索空间或接收MCCH就可以获知当前MTCH的配置信息是否发生改变，从而确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
在本发明实施例中，MTCH的配置信息可以包括该MTCH的PDCCH搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息、该MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，对此本发明实施例不做限定。
应理解，本发明实施例可应用于处理组播业务，该组播业务例如可以是多媒体广播多播业务(Multimedia Broadcast Multicast Service，简称MBMS)和/或SC-PTM中的组播业务。在本发明实施例中，除特殊说明外，MTCH和SC-MTCH、MCCH和SC-MCCH之间均可以互换。
下面将以SC-PTM技术为例，对本发明实施例进行详细说明，但应理解，本发明实施例还可以应用于其他组播技术中。
在本发明实施例中，功能结构简单的终端设备，例如，智能水表或电表等上的抄表模块，由于能力有限，在接收当前SC-MTCH该终端设备无法同时接收SC-MCCH(或无法检测其他搜索空间，如SC-MCCH的搜索空间)。对于已经开始接收当前组播业务的终端设备，该终端设备可以根据已经获取的组播业务的配置信息，在对应搜索空间中监听用于调度当前SC-MTCH的DCI，该终端设备根据调度SC-MTCH的DCI，接收基站发送的SC-MTCH。进一步地，在本发明中实施例中，该调度SC-MTCH的DCI可以包括指示信息，该指示信息用于指示该当前SC-MTCH的配置信息在下一MP或当前MP发生改变。
在本发明实施例中，该SC-MTCH的配置信息可以包括调度该SC-MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该SC-MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该SC-MTCH的DRX的配置信息，该SC-MTCH的会话Session ID对应的G-RNTI、该SC-MTCH调度信息和邻小区信息等。
本发明实施例中，终端设备接收当前组播业务之前或过程中，终端设备可以根据当前组播业务的会话Session ID，确定对应该Session ID的G-RNTI，根据已经获取的当前组播业务的配置信息，在PDCCH中检测用于调度当前SC-MTCH的DCI，该DCI可以用对应于该Session ID的G-RNTI进行CRC加掩或加扰，该终端设备根据该DCI接收基站发送的SC-MTCH。进一步地，在本发明实施例中，该DCI可以包括指示信息，该指示信息用于指示当前SC-MTCH的配置信息在下一MP或当前MP发生改变。
具体地，在本发明实施例中，上述DCI中的指示信息可以是该DCI中的至少一个比特(bit)的指示域，该指示域可以用于指示该当前SC-MTCH的配置信息在下一MP或当前MP发生改变。例如，指示域包括1个bit，当该指示域值为0时，该指示信息具体指示当前SC-MTCH的配置信息在下一MP或当前MP发生改变，或当指示域值为1时，该指示信息具体指示当前SC-MTCH的配置信息在当前MP或下一MP发生改变。再例如，该指示域中包括2个bit，，当指示域值为“00”时，可以指示当前SC-MTCH的配置信息在下一MP或当前MP发生改变，当指示域的值为“01”时，该指示信 息为指示当前SC-MTCH的配置信息在当前MP或下一MP发生改变。
具体地，在本发明实施例中，上述DCI中的指示信息可以是该DCI中的至少一个比特(bit)的指示域，该指示域可以用于指示该当前SC-MTCH的配置信息在下一MP或当前MP发生改变。例如，指示域包括1个bit，当该指示域值为0时，该指示信息具体指示当前SC-MTCH的配置信息在下一MP发生改变，或当指示域值为1时，该指示信息具体指示当前SC-MTCH的配置信息在下一MP不发生改变或在当前MP发生。
应理解，在本发明实施例中，利用调度该当前SC-MTCH的DCI中的指示信息来指示该当前SC-MTCH的配置信息在下一MP或当前MP发生改变，该指示信息可以承载在该DCI的至少一个bit中，上面举例说明仅仅是本发明的一种具体实现方式，但本发明实施例不限于此。例如，该调度SC-MTCH的DCI中可以包括3个bit，该3个bit的任意bit的二进制组合都可以指示该当前SC-MTCH在下一MP或当前MP发生改变。
应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示，本发明实施例对此不做限定。
图4示出了本发明实施例的终端设备接收组播业务示意图。本发明实施例以NB-IoT系统为例，但是也适用于其他通信系统。因此，虽然本发明实施例采用NPDSCH和NPDCCH描述物理层信道，但是也可将其替换成系统的对应物理层信道，例如PDSCH和PDCCH。由图4可以看出，承载组播业务的SC-MTCH和承载组播业务配置信息的SC-MCCH在NPDSCH上发送，SC-MCCH和SC-MTCH通过承载在NPDCCH上的DCI来调度传输。
在本发明实施例中，针对SC-MTCH和SC-MCCH可以定义不同的搜索空间，对于调度SC-MTCH和SC-MCCH的DCI格式可以不同。由图4可以看出调度SC-MTCH和SC-MCCH的DCI分别在SC-MTCH的和SC-MCCH的搜索空间中发送。应理解，作为一种具体的实现方式，SC-MTCH的搜索空间与SC-MCCH的搜索空间可以配置重合。
终端设备在接收当前SC-MTCH或在NPDCCH的搜索空间中监听调度用于承载SC-MTCH的NPDSCH的DCI的过程中，无法同时接收NPDSCH上承载的SC-MCCH或在用于调度SC-MCCH的搜索空间中监听调度用于承 载SC-MCCH的NPDSCH的DCI。在本实施例中，在该终端设备接收当前SC-MTCH过程中，在调度用于承载该SC-MTCH的NPDSCH的DCI中加入指示信息，该指示信息可以指示当前SC-MTCH对应的组播业务的配置信息在下一MP或当前MP中发生改变。当该指示信息指示当前SC-MTCH对应的组播业务的配置信息在下一MP或当前MP中发生改变时，该终端设备在下一MP或当前MP内停止当前SC-MTCH的接收，在用于调度承载SC-MCCH的NPDSCH的搜索空间中监听调度SC-MCCH的DCI，根据该DCI重新获取SC-MCCH，根据该SC-MCCH获取组播业务变更后配置信息。
应理解，在本发明实施例中，该指示信息还可以指示当前SC-MTCH的配置信息在下一MP或当前MP没有发生改变。此时，终端设备可以按照当前SC-MTCH的配置信息继续监听相关搜索空间并接收当前SC-MTCH。
可选地，在本发明实施例中，该调度当前MTCH的DCI中的指示信息还可以用于指示当前小区内其他MTCH的配置信息在该下一MP或当前MP发生改变。因此在接收当前组播的终端设备可以根据其实现来确定是否重新读取当前小区组播配置信息，从而提高系统的灵活性。
应理解，该其他MTCH可以为当前小区中除去终端设备正在接收的当前MTCH之外的其他MTCH。其他MTCH可以是终端设备没有使用的MTCH。
通过本发明的实施例，终端设备只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息是否发生了改变，也可以获知到其他MTCH的配置信息是否发生了改变。因此，终端设备不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
具体地，在本发明实施例中，终端设备在接收该当前组播业务的过程中，接收基站发送的调度该当前SC-MTCH的DCI，该DCI中的指示信息还可用于指示其他SC-MCTH的配置信息在下一MP或当前MP发生发生改变。例如，可以在DCI中引入至少一个bit的指示域，当指示域的值为1时，该指示信息指示其他SC-MTCH的配置信息在下一MP或下一MP发生改变，当指示域的值为0时，该指示信息指示其他MTCH的配置信息在当前MP或下一MP没有发生改变。因此，该终端设备可以根据该指示信息确定是否需 要重新获取变更后的配置信息，从而提高了系统的灵活性。
应理解，在本发明实施例中，该DCI还可以包括2个bit的指示域，当该2个bit的值为“01”时，该指示信息指示其他SC-MCCH的配置信息在下一MP或当前发生改变，当该2个bit的值为“11”时，该指示信息指示其他SC-MCCH的配置信息在当前MP或下一MP没有发生改变。
还应理解，在调度当前SC-MTCH的DCI中包括的指示信息还可以用3个bit的任意二进制组合来指示，例如，利用3个bit的bit值为“000”来指示其他SC-MCCH的配置信息在下一MP或下一MP发生改变。当然，以上仅仅是本发明的具体实现方式，但本发明实施例不限于此。
还应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示，本发明实施例对此不做限定。
还应理解，在本发明实施例中，该小区中其他MTCH的配置信息发生改变包括：小区当前已有的组播业务(可以是小区中的除终端设备的当前组播业务以外的任何已有的组播业务)的配置信息发生改变、小区内新增组播业务或删除已有组播业务。
还应理解，在本发明实施例中，该当前组播业务的配置信息和其他MTCH的配置信息承载在SC-MCCH逻辑信道中，其承载在NPDSCH上，并由DCI进行调度。该DCI可以在预设或预配置的搜索空间中发送，并且可以通过预设的UEID，例如SC-RNTI，进行CRC加掩。本发明实施例中，当终端设备根据该指示信息，确定需要在当前MP和下一个MP需要重新获取变更后的配置信息时，终端设备可以在NPDCCH上监听调度SC-MCCH的DCI，根据该DCI接收基站发送的SC-MCCH。该SC-MCCH中包括当前小区组播配置信息，该当前小区组播配置信息包含至少一个SC-MTCH的配置信息。这些SC-MTCH为在小区内正在进行组播的组播业务。终端通过重新获取该当前小区组播配置信息，可以获取该当前SC-MTCH的配置信息和其他正在组播的SC-MTCH的组播配置信息。
可选地，作为本发明的另一个实施例，调度当前SC-MTCH的DCI中包括的指示信息还用于指示当前小区组播配置信息在当前MP或者下一个MP中发生改变。
具体地，在本发明实施例中，当前小区组播配置信息为该小区中至少一个的组播业务信道MTCH的配置信息的集合或列表。进一步地，该MTCH的配置信息可以包括以下信息中的至少一种：该MTCH的搜索空间的配置信息、该MTCH的DRX的配置信息，该MTCH的会话Session ID对应的G-RNTI，该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，当前小区组播配置信息的改变可以包括以下中的至少一种：小区当前已有MTCH的配置信息发生改变、小区内新增MTCH和删除已有MTCH。
具体地，在本发明实施例中，终端设备在接收当前SC-MTCH的过程中，通过调度当前SC-MTCH的DCI中的指示信息可以获知当前小区组播配置信息在当前MP或者下一个MP发生改变。例如，可以在调度当前SC-MTCH的DCI中引入至少一个bit的指示域，当指示域值为1时，该指示信息指示当前小区组播配置信息在下一MP或当前发生改变；当指示域值为0时，该指示信息指示当前小区组播配置信息在下一个MP或当前MP中没有发生改变，从而该终端设备可以根据该指示信息确定是否需要重新获取变更后的当前小区组播配置信息，提高可系统的灵活性。
应理解，在本发明实施例中，该DCI还可以包括2个bit的指示域，当该指示域的值为“01”时，该指示信息指示当前小区中新增SC-MTCH，当该指示域的值为“11”时，该指示信息指示当前小区中删除已有SC-MTCH。当然，还可以用该指示域中第0位bit指示是否新增SC-MTCH，用第1位bit指示是否删除已有SC-MTCH。例如，当第0位bit值为1时，该指示信息指示当前小区中增加SC-MTCH，第1位bit值为1时指示信息指示当前小区中删除已有SC-MTCH。
还应理解，调度当前SC-MTCH的DCI中的指示信息还可以用3个bit的任意二进制组合来指示当前小区中新增SC-MTCH和/或删除已有SC-MTCH。当然，以上仅仅是本发明实施例的具体实现方式，但本发明实施例不限于此。
还应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示， 本发明实施例对此不做限定。
如图5所示，在本发明实施例中，可选地，在该终端设备接收该DCI之前，该方法还包括：
S301，终端设备在物理下行控制信道监听用于调度该当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
具体地，在本发明实施例中，终端设备在接收基站发送的下行控制信息DCI之前，将在NPDCCH上监听用于调度当前SC-MTCH的DCI的搜索空间，而不监听调度SC-MCCH的DCI的搜索空间。
上面结合图3至图5，从终端设备侧详细描述了本发明实施例的基于组播的无线通信方法，下面结合图6，从基站侧详细描述本发明实施例的基于组播的无线通信方法。应理解，基站侧的描述与终端设备侧的描述相互对应，类似的描述可以参照上文。
如图6所示，根据本发明实施例的基于组播的无线通信方法包括：
S410，基站生成下行控制信息DCI，该DCI用于调度第一组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该MTCH的配置信息在下一变更周期MP或当前MP发生改变；
S420，该基站向终端设备发送该DCI。
通过本发明的实施例，基站在调度MTCH的DCI中加入指示信息，该指示信息用于指示该MTCH的配置信息发生改变，因此终端设备只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息发生了改变，不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
在本发明实施例中，该MTCH的配置信息可以包括该MTCH的PDCCH搜索空间的配置信息。此外，该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息、该MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，本发明实施例的内容主要适用于组播业务，包括多媒体广播多播业务(Multimedia Broadcast Multicast Service，简称MBMS)MBMS和SC-PTM，因此，在本发明实施例中，除特殊说明外，MTCH和SC-MTCH、 MCCH和SC-MCCH之间均可以互换。
具体地，在本发明实施例中，基站生成下行控制信息DCI，该DCI包括指示信息，该指示信息可以具体用于指示SC-MTCH的配置信息在下一变更周期MP或当前MP发生改变。该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
可选地，在本发明实施例中，用于调度SC-MTCH的DCI中包括的指示信息还可用于指示第二SC-MTCH的配置信息在该下一MP或当前MP发生改变。具体地，在本发明实施例中，该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
应理解，在本发明实施例中，该第二SC-MTCH可以为当前小区中除去当前正在接收的第一SC-MTCH之外的SC-MTCH，例如可以是除前正在接收的第一SC-MTCH之外的所有SC-MTCH。
可选地，在本发明另一实施例中，用于调度SC-MTCH的DCI中的指示信息还可用于指示当前小区组播配置信息在当前MP或者下一个MP中发生改变。具体地，在本发明实施例中，该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
该当前小区组播配置信息为该小区内所包括的组播业务信道MTCH的配置信息的集合或列表。进一步该MTCH的配置信息可以包括以下信息中的至少一种：该MTCH的搜索空间的配置信息、该MTCH的DRX的配置信息，该MTCH的会话Session ID对应的G-RNTI，该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，该当前小区组播配置信息的改变包括以下中的至少一种：当前小区已有组播业务的配置信息发生改变、小区内新增组播业务或删除小区内已有组播业务。
上文中结合图1至图6，详细描述了根据本发明实施例的基于组播的无线通信方法，下面结合图7-图10，详细描述根据本发明实施例的终端设备和基站。由于图7-图10描述的装置可以执行上述方法，因此未详细描述的部分可以参见前面各方法实施例。
如图7所示，根据本发明实施的终端设备30，该终端设备30包括：
接收模块31，用于接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
获取模块32，用于根据该指示信息获取变更后的当前MTCH的配置信息。
本发明实施例的终端设备接收基站发送的用于调度当前MTCH的DCI，并基于该DCI获取承载在MTCH中的组播业务数据，本发明实施例的方案在该DCI中添加了指示信息，指示当前MTCH的配置信息是否发生改变，也就是说，终端设备无需检测MCCH的搜索空间或接收MCCH就可以获知当前MTCH的配置信息是否发生改变，从而确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。。
在本发明实施例中，该MTCH的配置信息可以包括该MTCH的PDCCH搜索空间的配置信息。应理解，在本发明实施例中该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息和该MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
可选地，在本发明实施例中，该DCI可以包括指示信息，该指示信息可以用于指示当前MTCH的配置信息在下一MP或当前MP发生改变。
可选地，在本发明实施例中，该DCI中指示信息还可以用于指示其他MTCH的配置信息在该下一MP或当前MP发生改变。因此在接收当前组播的终端设备可以根据其实现来确定是否重新获取该其他MTCH的配置信息，提高了系统的灵活性。
可选地，在本发明实施例中，该DCI中指示信息还可以用于指示当前小区组播配置信息在当前MP或下一MP发生改变。
可选地，在本发明实施例的中，该终端设备30还包括：
监听模块，用于在接收模块接收该DCI之前，在在物理下行控制信道监听用于调度该当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
具体地，在本发明实施例中，接收模块31在接收基站发送的下行控制信息DCI之前，监听模块将在PDCCH上监听用于调度当前SC-MTCH的 DCI的搜索空间，而不监听调度SC-MCCH的DCI的搜索空间。
应理解，根据本发明实施例的终端设备30可对应于本发明方法实施例中的终端设备，并且终端设备30中的各个模块的上述和其它操作和/或功能能够实现图3和图5中的各个方法的各个步骤，为了简洁，在此不再赘述。
图8示出了本发明实施例的基站40，该基站40包括：
处理模块41，用于生成下行控制信息DCI，该DCI用于第一调度组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
发送模块42，用于向终端设备发送该DCI。
通过本发明的实施例，基站在调度第一MTCH的DCI中加入指示信息，该指示信息用于指示该第一MTCH的配置信息发生改变，因此终端设备只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息发生了改变，不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
在本发明实施例中，该MTCH的配置信息可以包括调度该MTCH的搜索空间的配置信息。应理解，在本发明实施例中该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息、该MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
可选地，在本发明实施例中，该处理模块41生成下行控制信息DCI，该DCI中包括指示信息，该指示信息可以用于指示该第一MTCH的配置信息在下一变更周期MP或当前MP发生改变。具体地，在本发明实施例中该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
可选地，在本发明实施例中，该处理模块41生成的调度MTCH的DCI中的指示信息还可以用于指示第二MTCH的配置信息在该下一MP或当前MP发生改变。
可选地，在本发明实施例中，该处理模块41生成的调度MTCH的DCI中的指示信息还可以用于指示当前小区组播配置信息发生改变。
应理解，根据本发明实施例的基站40可对应于本发明方法实施例中的 网络设备，并且基站40中的各个模块的上述和其它操作和/或功能能够实现图6中方法的各个步骤，为了简洁，在此不再赘述。
图9示出了本发明实施例提供的终端设备50，该终端设备50包括处理器51、发送器52、接收器53、存储器54和总线系统55。其中，处理器51、发送器52、接收器53和存储器54通过总线系统55相连，该存储器54用于存储指令，该处理器51用于执行该存储器54存储的指令，以控制该发送器52发送信号，并控制该接收器53接收信号。
其中，该接收器53用于接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
该处理器51用于根据该接收器53接收的指示信息获取变更后的当前MTCH的配置信息。
可选地，在本发明实施例中，该处理器51还用于在接收器53接收该DCI之前，在在物理下行控制信道监听用于调度该当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
可选地，存储器54可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器530可以用于执行存储器中存储的指令，并且当该处理器执行存储器中存储的指令时，该处理器用于执行上述方法实施例的各个步骤和/或流程。
图10示出了本发明实施例提供的基站60，该基站60包括处理器61、发送器62、接收器63、存储器64和总线系统65。其中，处理器61、发送器62、接收器63和存储器64通过总线系统65相连，该存储器64用于存储指令，该处理器61用于执行该存储器64存储的指令，以控制该发送器62发送信号，并控制该接收器63接收信号。
其中，该处理器61用于生成下行控制信息DCI，该DCI用于调度第一组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示当前MTCH的播配置信息在下一变更周期MP或当前MP发生改变；
发送器62用于向终端设备发送该DCI。
可选地，该存储器64可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储 器。例如，存储器还可以存储设备类型的信息。该处理器61可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
应理解，在本发明以上的各个实施例中，其中变更周期MP可以指如图4中的MCCH的变更周期MP，或者也可以指针对SC-MTCH定义的SC-MTCH配置信息变更周期MP。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP，可以和MCCH的变更周期相等或者是MCCH的变更周期的数倍。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP可以通过系统消息进行配置，或者在SC-MCCH中进行配置。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP可以针对每个MTCH进行独立配置，也可以一个小区中所有的SC-MTCH使用相同的SC-MTCH配置信息变更周期MP。
上面详细描述了在终端设备接收当前组播业务的情况下，通过调度当前SC-MTCH的DCI中的指示信息来指示当前SC-MTCH的配置信息发生改变的方法和装置，下面将详细描述在终端设备未接收任何组播业务的情况下，基于组播的无线通信方法。
终端设备在未接收基站发送的任何组播业务的情况下，该终端设备可以在PDCCH上监听调度MCCH的DCI的搜索空间或接收MCCH或接收其他业务。当终端设备监听到调度MCCH的DCI后，通过该DCI接收MCCH，从而获取当前小区组播配置信息。如果当前小区内组播配置信息未发生改变时，终端设备仍然监听调度MCCH的DCI的搜索空间，并根据该DCI获取MCCH，增加了终端设备的开销，造成资源浪费，降低了系统的灵活性。基于以上技术问题，本发明实施例提供了一种基于组播的无线通信方法，以解决如果当前小区内组播配置信息未发生改变时，终端设备检测到调度MCCH的DCI后仍然获取该小区组播配置信息，增加了终端设备的开销，降低了系统的灵活性的问题。
图11示出了本发明实施例的基于组播的无线通信方法，该方法包括：
S510，终端设备接收基站发送的指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示 格式DIF中
S520，该终端设备根据该指示信息获取变更后的当前小区组播配置信息。
在本发明的实施例中，终端设备在未接收任何组播业务的情况下，只需要检测MCCH对应的搜索空间，并从该搜索空间中获取调度该MCCH的DCI中包含的指示信息，或者检测系统主信息块MIB中包含的指示信息，或者检测用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中包含的指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，降低了终端设备的资源开销，提高系统的灵活性。
具体而言，在本发明实施例中，终端设备在未接收当前组播业务的情况下，具有能力检测SC-MCCH对应的搜索空间，并从该搜索空间中获取调度该SC-MCCH的DCI，在该DCI中包含指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息，或接收基站发送的主信息块MIB，在该MIB中包含指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息，或接收基站发送的用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF，该DIF包含指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息。该终端设备根据该指示信息获取变更后的当前小区组播配置信息。
作为本发明的一个实施例，终端设备接收基站发送的下行控制信息DCI，该DCI用于调度MCCH，该DCI可以包括指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，终端设备未接收任何组播业务的情况下，该终端设备可以在NPDCCH上监SC-MCCH对应的搜索空间，并从该搜索空间中获取调度SC-MCCH的DCI。在该调度SC-MCCH的DCI中可以包括至少一个bit的指示域，该指示域可以指示当前小区组播配置信息在当前MP或下一MP发生改变。例如，该指示域可以包括1bit，当指示域值为0时，该指示信息可以指示当前小区组播配置信息在下一MP或当前MP发生改变，或当指示域值为1时，该指示信息可以指示当前小区组播配置信息在当 前MP或下一MP未发生改变。当然，应理解，在本发明实施例中该指示域还可以包括2个bit，在该指示域中，当该指示域的值为“00”时，该指示信息可以为指示当前小区组播配置信息在当前MP或下一MP发生改变；或当指示域的值为“01”时，该指示信息可以为指示当前小区组播配置信息在下一MP或下一MP中没有发生改变。
应理解，在本发明实施例中，利用调度该SC-MCCH的DCI中包含的指示信息来指示该当前小区组播配置信息在当前MP或下一MP发生改变，该指示信息可以利用该DCI中至少一个bit的指示域来指示，上面举例说明仅仅是本发明实施例的一种具体实现方式，但本发明实施例不限于此。例如，该指示域还可以包括3个bit，该指示域中所有bit的任意二进制组合都可以做为指示信息来指示该当前小区组播配置信息在当前MP或下一MP是否发生改变。
还应理解，在本发明实施例中，可以通过在调度SC-MCCH的DCI中添加至少一个bit来显性指示当前小区组播业务配置信息发生改变，也可以通过该DCI中已有bit为来隐形指示当前小区组播业务配置信息发生改变，对此本发明实施例不做限定。
因此，终端设备在未接收任何组播业务的情况下，终端设备检测MCCH对应的搜索空间，并获取该搜索空间中发送的用于调度该MCCH的DCI，通过该DCI中包括的指示信息来获知当前小区组播配置信息发生变化，从而使NB-IoT系统中的低能力终端设备不需要在同一搜索空间中同时接收多个DCI(例如，一个用于调度MCCH的DCI，另一个用于指示当前小区组播配置信息变更的DCI)，只需要接收调度MCCH的DCI即可知道当前小区组播配置信息是否在下一MP或当前MP发生改变，从而避免在当前小区组播配置信息未发生变化时仍然重新获取该小区组播配置信息。
作为本发明的另一个实施例，终端设备可以接收基站发送的主信息块(Master Information Block，简称“MIB”)，该MIB可以包括指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，该当前小区组播配置信息可以直接作为系统消息进行广播。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中可以包括该当前小区组播配置信息。终端设备在接入小区后，终端设备可以首先获取MIB和SIB，在MIB和SIB中包含了该 小区配置的基本参数，本实施例中当前小区组播配置信息可以承载在SIB中，因此不需要使用DCI进行调度。终端设备可以通过读取SIB，获知当前小区组播配置信息。
应理解，对于终端设备来说，在第一次获取SIB之后，不需要持续性地一直读取SIB。因此，本发明实施例在MIB中包含指示信息，该指示信息用于指示当前小区组播配置信息在当前MP或下一MP中发生改变。因此，所述终端设备不需要读取相关SIB(例如SIB20)，只需要周期性读取MIB即可获知是否需要重新读取包含当前小区组播配置信息的SIB(例如SIB20)。
具体地，在发明实施例中，该MIB中可以包括至少一个比特bit的指示域，该指示域用于指示该当前小区组播配置信息在当前MP或下一MP发生改变。例如，在该指示域可以包括1个bit，在该指示域中，当指示域值0时，指示当前小区组播配置信息在当前MP或下一发生改变；或，当指示域值为0时，该指示域指示当前小区组播配置信息在下一MP或当前MP未发生改变。再例如，该指示域还可以包括2个bit，在该指示域中，当该指示域的值为“00”时，该指示域指示当前小区组播配置信息当前MP或下一发生改变；或当指示域的值为“01”时，该指示域指示当前小区组播配置信息在下一MP或当前中未发生改变。
应理解，在本发明实施例中，利用MIB中包括的指示信息指示该当前小区组播配置信息在当前MP或下一MP发生改变，该指示信息可以利用该MIB中至少一个bit来指示，上面举例说明仅仅是本发明的一种具体实现方式，但本发明实施例不限于此。例如，该第MIB中可以包括3个bit，该3个bit的所有bit的任意二进制组合都可以做为指示信息来指示该当前小区组播配置信息在当前MP或下一MP发生改变。
还应理解，在本发明实施例中，可以通过在MIB中添加至少一个bit来显性指示当前小区组播业务配置列表发生改变，也可以通过MIB中已有bit为来隐形指示当前小区组播业务配置列表发生改变，对此本发明实施例不做限定。
因此，终端设备通过接收MIB来获知当前小区内组播配置信息发生变化，从而使该终端设备避免在当前小区组播配置信息未发生变化时仍然重新获取该小区组播配置信息，提高了系统的灵活性。
作为本发明的一个实施例，终端设备可以接收基站发送的直接指示格式 (Direct Indication Format，简称“DIF”)，该DIF可以包括指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，该当前小区组播配置信息可以放置在SC-MCCH逻辑信道中发送，也可以放置在系统信息SIB中而进行广播。当前小区组播配置信息放置在系统信息中时，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备可以接收用于在寻呼时机PO上指示系统消息变更的直接指示格式(Direct Indication Format，简称“DIF”)，该DIF中可以包括指示信息，该指示信息可以指示当前小区组播配置信息在当前MP或下一MP发生改变。
具体地，在发明实施例中，该DIF中可以包括至少一个比特bit的指示域，该指示域用于指示该当前小区组播配置信息在当前MP或下一MP发生改变。例如，在该指示域可以包括1个bit，在该指示域中，当指示域的值0时，指示当前小区组播配置信息在当前MP发生改变；或，当指示域的值为0时，该指示域指示当前小区组播配置信息在当前MP未发生改变。应理解，在本发明实施例中，该指示域还可以包括2个bit，在该指示域中，当该指示域的值为“00”时，该指示域指示当前小区组播配置信息在当前MP发生改变；或当指示域的值为01时，该指示域指示当前小区组播配置信息在当前MP中未发生改变。
应理解，在本发明实施例中，利用DIF中包括的指示信息指示该当前小区组播配置信息在当前MP或下一MP发生改变，该指示信息可以利用该DIF中至少一个bit来指示，上面举例说明仅仅是本发明实施例的一种具体实现方式，但本发明实施例不限于此。例如，该DIF中可以包括3个bit，该3个bit的所有bit的任意二进制组合都可以做为指示信息来指示该当前小区组播配置信息在当前MP或下一MP发生改变。
还应理解，在本发明实施例中，可以通过在DIF中添加至少一个bit来显性指示当前小区组播配置信息发生改变，也可以通过DIF中已有bit为来隐形指示当前小区组播配置信息发生改变，作为一种例子，该DIF可以为NB-IoT中DCI格式formatN2，该DCI formatN2可以用来在终端设备的寻呼机会上指示所述系统信息发生了改变，这里该指示当前小区组播配置信息变更的指示信息可以使用DCI format N2中尚未分配的bit，对此本发明实施例不做限定。
可选地，在本发明实施例中，该当前小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括调度该每个MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、MTCH的调度信息和邻小区信息等，对此本发明实施例不做限定。
应理解，在本发明实施例中，终端设备在未接收任何组播业务的情况下，该指示信息指示当前小区组播配置信息在当前MP或下一MP内发生改变。具体当前小区组播配置信息发生改变包括当前小区中已有MTCH的删除、当前小区新增MTCH、当前小区中已有MTCH的配置信息发生改变。
可选地，作为本发明另一个实施例，该指示信息可以用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
具体地，在本发明实施例中，终端设备未接收任何组播业务的情况下，该终端设备可以在NPDCCH上检测SC-MCCH对应的搜索空间，并从该搜索空间中获取调度SC-MCCH的DCI。在该调度SC-MCCH的DCI中可以包括至少一个bit的指示域，该指示域可以指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
具体地，作为本发明的另一实施例，终端设备可以接收基站发送的主信息块(Master Information Block，简称“MIB”)，该MIB可以包括指示信息，指示信息用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
具体地，作为本发明的再一实施例，终端设备可以接收基站发送的用于在寻呼时机PO上指示系统消息变更的直接指示格式(Direct Indication Format，简称“DIF”)，该DIF中可以包括指示信息，指示信息用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
应理解，用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH的指示信息可以为该DCI或MIB或DIF中至少一个bit的指示域。
上面从终端设备侧对本发明实施例的基于组播的无线通信方法进行了 详细描述，下面将从基站侧对本发明实施例的基于组播的无线通信方法进行详细说明。
图12示出了本发明实施例的基于组播的无线通信方法，该方法包括：
S610，基站生成指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
S620，该基站向终端设备发送该指示信息。
在本发明的实施例中，基站生成指示信息，该指示信息可以包含在调度MCCH的DCI中，或者包含在主信息块MIB中，或者包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中，该基站向终端设备发送该指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，提高了系统的灵活性。
在本发明的一个实施例，基站可以向终端设备发送下行控制信息DCI，该DCI用于调度MCCH，该DCI包括指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，该指示信息可以为用于调度单小区组播控制信道SC-MCCH的DCI中的信息。基站在PDCCH上的搜索空间中向终端设备发送用于调度SC-MCCH的DCI，在该调度SC-MCCH的DCI中可以包括至少一个bit的指示域，该指示域可以指示当前小区组播配置信息发生改变。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述
作为本发明的一个实施例，基站可以向终端设备发送主信息块(Master Information Block，简称“MIB”)，该MIB可以包括指示当前小区组播配置信息在当前MP或下一MP内发生改变的指示信息。对于终端设备来说，在第一次接收基站发送的SIB之后，不需要持续性地一直读取SIB，只需要周期性读取基站发送的MIB即可获知是否需要重新读取包含当前小区组播配置信息的SIB(例如SIB20)。因此，通过接收MIB来获知当前小区内组播配置信息发生变化，从而使该终端设备避免在当前小区组播配置信息未发生 变化时仍然重新获取该小区组播配置信息，提高了系统的灵活性。
具体地，在本发明实施例中，基站可以向终端设备广播当前小区组播配置信息。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备在接入小区后，终端设备首先获取MIB和SIB，在MIB和SIB中包含了该小区配置的基本参数，在本发明实施例中当前小区组播配置信息承载在SIB中，因此不需要使用DCI进行调度。终端设备通过读取SIB，可以获知当前小区组播配置信息。对于终端设备来说，在第一次获取SIB之后，不需要持续性地一直读取SIB。因此，本发明实施例在MIB中包含指示信息，该指示信息用于指示当前小区组播配置信息在当前MP或下一MP中发生改变。因此，所述终端不需要读取相关SIB(例如SIB20)，只需要周期性读取MIB即可获知是否需要重新读取包含当前小区组播配置信息的SIB(例如SIB20)。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
作为本发明的另一个实施例，基站向终端设备发送直接指示格式(Direct Indication Format，简称“DIF”)，该DIF可以包括指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
可选地，在本发明实施例中，该当前小区组播配置信息包括该当前小区内至少一个SC-MTCH的配置信息，其中，该MTCH的配置信息包括调度该MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括、该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、该MTCH的调度信息和邻小区信息等，本发明实施例对此不做具体限定。
可选地，在本发明实施例中，该指示信息还可以指示当前小区中已有MTCH的删除，或当前小区新增MTCH，或当前小区中已有MTCH的配置信息发生改变。
上面结合图11和图12详细描述了本发明实施例的基于组播的无线通信方法，下面将详细描述本发明实施例的终端设备和基站。
图13示出了根据本发明实施例的终端设备70。终端设备70能够执行图11和图12中的由终端设备执行的各个步骤，为避免重复，此处不再详述。终端设备70包括：
接收模块71，用于接收基站发送的指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
获取模块72，用于根据该指示信息获取变更后的当前小区组播配置信息。
在本发明的实施例中，终端设备在未接收任何组播业务的情况下，只需要检测MCCH对应的搜索空间，并从该搜索空间中获取调度该MCCH的DCI中包含的指示信息，或者检测系统主信息块MIB中包含的指示信息，或者检测用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中包含的指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，降低了终端设备的资源开销，提高系统的灵活性。
作为本发明的一个实施例，该接收模块71可以接收基站发送的下行控制信息DCI，该DCI用于调度组播控制信道MCCH，该DCI包括指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息。。
具体地，在本发明实施例中，终端设备未接收任何组播业务的情况下，该终端设备可以在PDCCH上的搜索空间中持续监听用于调度SC-MCCH的DCI，在该调度SC-MCCH的DCI中可以包括至少一个bit的指示域，该指示域可以指示当前小区组播配置信息发生改变。
作为本发明的一个实施例，该接收模块71可以接收基站发送的主信息块(Master Information Block，简称“MIB”)，该MIB可以包括指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，该当前小区组播配置信息可以直接作为系统消息进行广播。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备在接入小区后，终端设备首先获取MIB和SIB，在MIB和SIB中包含了该小区配置的基本参数，终端设备可以根据MIB和SIB中的小区配置在PDCCH上接收 专用或公用DCI，该DCI可以调度终端设备接收SC-MCCH或SC-MTCH。终端设备在未接收组播业务的情况下，该终端设备可以首先从MIB中读取相关信息，在该MIB的信息中可以包括指示信息，该指示信息用于指示当前小区组播配置信息在当前MP或下一MP中发生改变。
作为本发明的一个实施例，该接收模块71可以接收基站发送的直接指示格式(Direct Indication Format，简称“DIF”)中的信息，该DIF用于在寻呼时机PO上指示系统消息变更的，该DIF可以包括指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息。
具体地，在本发明实施例中，该当前小区组播配置列表可以不放置在SC-MCCH逻辑信道中发送，而可以直接作为系统消息进行广播。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备在接入小区后，终端设备首先获取MIB和SIB，在MIB和SIB中包含了该小区配置的基本参数，终端设备可以根据MIB和SIB中的小区配置在PDCCH上接收专用或公用DCI，该DCI可以调度终端设备接收SC-MCCH或SC-MTCH。在终端设备未接收任何组播业务的情况下，在寻呼时机PO上指示系统消息变更的直接指示格式(Direct Indication Format，简称“DIF”)中可以包括指示信息，该指示信息可以指示当前小区组播配置信息在当前MP或下一MP发生改变。
可选地，在本发明实施例中，该当前小区组播配置信息包括的当前小区内至少一个SC-MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括调度该每个MTCH的PDCCH搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、该MTCH的调度信息和邻小区信息等，对此本发明实施例不做限定。可选地，在本发明实施例中，该指示信息还可以指示当前小区中已有MTCH的删除，或当前小区新增MTCH，或当前小区中已有MTCH的配置信息发生改变。
图14示出了根据本发明实施例的基站80。基站80能够执行图11-12中由基站执行的各个步骤，为避免重复，此处不再详述。基站80包括：
处理模块81，用于生成指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在调度 组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
发送模块82，用于向终端设备发送该指示信息。
在本发明的实施例中，基站生成指示信息，该指示信息可以包含在调度MCCH的DCI中，或者包含在主信息块MIB中，或者包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中，该基站向终端设备发送该指示信息，终端设备便可以获知当前小区组播配置信息是否发生改变，当通过指示信息获知当前小区组播配置信息发生改变，然后再重新获取变更后的当前小区组播配置信息，从而使终端设备避免在当前小区组播配置信息未发生变更时重复获取当前小区组播配置信息，提高了系统的灵活性。。
作为本发明的一个实施例，处理模块81生成指示信息，该指示信息可以为DCI中的信息，该DCI用于调度组播控制信道MCCH。
具体地，在本发明实施例中，基站生成指示信息，该指示信息可以为用于调度组播控制信道MCCH的DCI中的信息。基站在PDCCH上的搜索空间中向终端设备发送用于调度SC-MCCH的DCI，在该调度SC-MCCH的DCI中可以包括至少一个bit的指示域，该指示域可以指示当前小区组播配置信息发生改变。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
作为本发明的一个实施例，处理模块81生成指示信息，该指示信息可以为主信息块(Master Information Block，简称“MIB”)中的信息。
具体地，在本发明实施例中，该当前小区组播配置信息可以直接作为系统消息进行广播。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备在接入小区后，终端设备首先获取MIB和SIB，在MIB和SIB中包含了该小区配置的基本参数，终端设备可以根据MIB和SIB中的小区配置在PDCCH上接收专用或公用DCI，该DCI可以调度终端设备接收SC-MCCH或SC-MTCH。基站生成的指示信息可以包括在MIB中，该指示信息用于指示当前小区组播配置信息在当前MP或下一MP中发生改变。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
作为本发明的一个实施例，处理模块81生成指示信息，该指示信息可以为直接指示格式(Direct Indication Format，简称“DIF”)中的信息，该 DIF用于调度终端设备的寻呼消息。
具体地，在本发明实施例中，该当前小区组播配置信息可以不放置在SC-MCCH逻辑信道中发送，而可以直接作为系统消息进行广播。为此，系统可以重新定义SIB，具体可以通过重新定义SIB20，从而使SIB20中包括该当前小区组播配置信息。终端设备在接入小区后，终端设备首先获取MIB和SIB，在MIB和SIB中包含了该小区配置的基本参数，终端设备可以根据MIB和SIB中的小区配置在PDCCH上接收专用或公用DCI，该DCI可以调度终端设备接收SC-MCCH或SC-MTCH。基站生成的指示信息可以包括在用于在寻呼时机PO上指示系统消息变更的直接指示格式(Direct Indication Format，简称“DIF”)中，该指示信息可以指示当前小区组播配置信息在当前MP或下一MP发生改变。对于具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
可选地，在本发明实施例中，该当前小区组播配置信息小区内至少一个SC-MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括调度该每个MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、该MTCH的调度信息和邻小区信息等，对此本发明实施例不做限定。
可选地，在本发明实施例中，基站生成指示信息，该指示信息还可以指示当前小区中删除已有MTCH或当前小区新增MTCH或当前小区中已有MTCH的配置信息发生改变。
图15示出了本发明实施例提供的终端设备90，该终端设备90包括处理器91、发送器92、接收器93、存储器94和总线系统95。其中，处理器91、发送器92、接收器93和存储器94通过总线系统95相连，该存储器94用于存储指令，该处理器91用于执行该存储器94存储的指令，以控制该发送器92发送信号，并控制该接收器93接收信号。
其中，接收器93用于接收基站发送的指示信息，该指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
处理器91用于根据该指示信息获取该当前小区组播配置信息。
可选地，在本发明实施例中，该指示信息可以为DCI中的信息，该DCI用于调度组播控制信道MCCH。
可选地，在本发明实施例中，该指示信息可以为主信息块(Master Information Block，简称“MIB”)中的信息。
可选地，在本发明实施例中，该指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变的指示信息可以为直接指示格式(Direct Indication Format，简称“DIF”)中的信息，该DIF在寻呼时机PO上指示系统消息变更。
可选地，在本发明实施例中，该当前小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括调度该每个MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、该MTCH的调度信息和邻小区信息等，对此本发明实施例不做限定。
可选地，在本发明实施例中，该指示信息还可以指示当前小区中删除已有MTCH或当前小区新增MTCH或当前小区中已有MTCH的配置信息发生改变。
可选地，该存储器94可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器91可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
图16示出了本发明实施例提供的基于组播的基站1000，该基站1000包括处理器1001、发送器1002、接收器1003、存储器1004和总线系统1005。其中，处理器1001、发送器1002、接收器1003和存储器1004通过总线系统1005相连，该存储器1004用于存储指令，该处理器1001用于执行该存储器1004存储的指令，以控制该发送器1002发送信号，并控制该接收器1003接收信号。
其中，处理器1001生成指示信息，该指示信息用于指示当前小区组播 配置信息在当前变更周期MP或下一MP内发生改变，该指示信息包含在调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
发送器1002，用于向终端设备发送该指示信息。
可选地，在本发明实施例中，该指示信息可以为DCI中的信息，该DCI用于调度组播控制信道MCCH。
可选地，在本发明实施例中，该指示信息可以为主信息块(Master Information Block，简称“MIB”)中的信息。
可选地，在本发明实施例中，该指示信息可以为直接指示格式(Direct Indication Format，简称“DIF”)中的信息，该DIF用于在寻呼时机PO上指示系统消息变更。
可选地，在本发明实施例中，该当前小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，其中，该集合中每个MTCH的配置信息包括调度该每个MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括该MTCH的非连续接收(Discontinuous Reception，简称“DRX”)的配置信息、该MTCH的Session ID对应的G-RNTI、该MTCH的调度信息和邻小区信息等，对此本发明实施例不做限定。
可选地，在本发明实施例中，基站生成指示信息，该指示信息还可以指示当前小区中删除已有MTCH或当前小区新增MTCH或当前小区中已有MTCH的配置信息发生改变。
可选地，该存储器1004可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器1003可以用于执行存储器中存储的指令，并且当该处理器执行存储器中存储的指令时，该处理器用于执行上述方法实施例的各个步骤和/或流程。
现有基于SC-PTM的组播业务中，不同的组播业务共享使用相同的SC-MTCH搜索空间。而当NB-IoT中需要引入基于SC-PTM的组播业务时，NB-IoT相比普通LTE具有更高的覆盖要求(例如相比普通LTE提升20dB)，因此在NB-IoT中需要使用重复发送的方法扩展组播的覆盖。对于不同的组播业务可能具有不同的覆盖要求：例如，对于水表抄表业务的NB-IoT终端， 水表通常安装在室内，因此对于水表上抄表模块的软件更新的组播业务(记为组播业务1)其组播覆盖要求较高，需要使用较多次的重复实现覆盖目标；而对于路灯上安装的NB-IoT模块的软件更新业务(记为组播业务2)，这些路灯上的NB-IoT模块一般均部署在室外，因此其覆盖要求一般不高，基站不需要使用多次重复即可达到覆盖要求。因此，如果类似于传统SC-PTM，所有的组播业务的SC-MTCH均共享使用相同的搜索空间，则组播业务2也需要使用较多次的重复来发送DCI，从而造成下行资源的浪费。
为解决这一问题，本发明在NB-IoT中需要引入基于SC-PTM的组播业务时，为不同组播业务的SC-MTCH配置不同的搜索空间，并在SC-MTCH配置信息中引入SC-MTCH的搜索空间配置，并支持对不同SC-MTCH的搜索空间配置不同的最大重复次数Rmax，即对不同的SC-MTCH业务具有不同覆盖要求的搜索空间。
图17示出了本发明实施例的基于组播的无线通信方法，该方法包括：
S710，终端设备接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中该集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
本发明在NB-IoT中需要引入基于SC-PTM的组播业务时，为不同组播业务的SC-MTCH配置不同的搜索空间，并在SC-MTCH配置信息中引入SC-MTCH的搜索空间配置信息，从而使调度MTCH的DCI具有不同搜索空间，降低了组播业务的重发次数，节省了下行资源。
S720，根据该小区组播配置信息获取小区中MTCH，即获取组播数据。
具体地，本发明实施例中，终端设备可以接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括该SC-MTCH的调度信息、邻小区信息、该SC-MTCH的非连续接收DRX的配置信息和该SC-MTCH的会话SessionID对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息 可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。在本实施例和后续实施例中，所述占用比例用G表示。
具体地，如果某SC-MTCH的配置信息的搜索空间配置信息包括：参数Rmax、G和αoffse，则所属搜索空间的起始子帧满足如下公式：
Figure PCTCN2016101257-appb-000001
其中T＝Rmax·G，nf为所述起始子帧的无线帧号，而ns为所述起始子帧对应的时隙号。而参数Rmax则表示所述搜索空间所占用的连续可用子帧的个数。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
可选地，在本发明实施例中，该小区组播配置信息可以承载于组播控制信道MCCH或SC-MCCH中，可以被基站在预设搜索空间中使用DCI动态调度，也可以使用系统广播信息半静态调度。如果SC-MCCH为系统消息半静态调度，则终端可以在读取到SIB后，根据SIB中的调度信息，在对应资源上获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。具体地，在本发明实施例中，终端设备接入小区后，检测SC-MCCH对应的搜索空间，从该搜索空间中获取调度该SC-MCCH的DCI，终端设备通过该DCI获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。
可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，从基站获取MIB和SIB，在该SIB中可以包括该小区组播配置信息。
上面从终端设备侧详细说明了本发明基于组播的无线通信方法，下面将从基站侧详细描述本发明基于组播的无线通信方法。
图18示出了本发明实施例的基于组播的无线通信方法，该方法包括：
S810，基站生成小区组播配置信息，该小区组播配置信息包括小区内至 少一个MTCH的配置信息的集合，其中该集合中每个MTCH的配置信息包括该每个MTCH的下行物理控制信道PDCCH搜索搜索空间的配置信息；
S820，该基站向终端设备发送该小区组播配置信息。
本发明在NB-IoT中需要引入基于SC-PTM的组播业务时，为不同组播业务的SC-MTCH配置不同的搜索空间，并在SC-MTCH配置信息中引入SC-MTCH的搜索空间配置信息，从而使调度MTCH的DCI具有不同搜索空间，降低了组播业务的重发次数，节省了下行资源。
具体地，本发明实施例中，基站可以生成小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括邻小区信息、该SC-MTCH的非连续接收DRX的配置信息和该SC-MTCH的会话SessionID对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
可选地，在本发明实施例中，该小区组播配置信息可以承载于组播控制信道MCCH中，可以被基站在预设搜索空间中使用DCI动态调度，也可以使用系统广播信息半静态调度。
具体地，在本发明实施例中，终端设备接入小区后，检测SC-MCCH对应的搜索空间，从该搜索空间中获取调度该SC-MCCH的DCI，终端设备通过该DCI获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。或者，如果SC-MCCH为系统消息半静态调度，则所述终端在读取到SIB后，根据SIB中的调度信息，在对应资源上获取基站发送的SC-MCCH， 在该SC-MCCH中包括该小区组播配置信息。
可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，基站向终端设备发送MIB和SIB，在该SIB中可以包括该小区组播配置信息。
上面描述了本发明基于组播的无线通信方法，下面将详细描述本发明基于组播的无线通信装置。
图19示出了本发明实施例的终端设备1100，该终端设备1100包括：
接收模块1110，用于接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中该集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
获取模块1120，用于根据该小区组播配置信息获取小区中MTCH。
具体地，本发明实施例中，终端设备可以接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括邻小区信息、该SC-MTCH的非连续接收DRX的配置信息和该SC-MTCH的会话SessionID对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
在本发明实施例中，该小区组播配置信息可以承载于组播控制信道MCCH或SC-MCCH中，可以被基站在预设搜索空间中使用DCI动态调度， 也可以使用系统广播信息半静态调度。
具体地，在本发明实施例中，终端设备接入小区后，检测SC-MCCH对应的搜索空间，从该搜索空间中获取调度该SC-MCCH的DCI，终端设备通过该DCI获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。或者，如果SC-MCCH为系统消息半静态调度，则所述终端在读取到SIB后，根据SIB中的调度信息，在对应资源上获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。
可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，从基站获取MIB和SIB，在该SIB中可以包括该小区组播配置信息。
应理解，根据本发明实施例的终端设备1100可对应于本发明方法实施例中的终端设备，并且终端设备1100中的各个模块的上述和其它操作和/或功能分别为了实现图17中的方法的相应流程，为了简洁，在此不再赘述。
图20示出了本发明示出了基站1200，该基站1200包括：
处理模块1210，用于生成小区组播配置信息，该小区组播配置信息包括小区内MTCH的配置信息的集合，其中该集合中每个MTCH的配置信息包括该每个MTCH的下行物理控制信道PDCCH搜索搜索空间的配置信息；
发送模块1220，用于向终端设备发送该小区组播配置信息。
具体地，本发明实施例中，基站可以生成小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括该SC-MTCH的非连续接收DRX的配置信息、邻小区信息、和该SC-MTCH的会话SessionID对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
可选地，该小区组播配置信息可以承载于组播控制信道MCCH或SC-MCCH中，可以被基站在预设搜索空间中使用DCI动态调度，也可以使用系统广播信息半静态调度。
可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，基站向终端设备发送MIB和SIB，在该SIB中可以包括该小区组播配置信息。
应理解，根据本发明实施例的基站1200可对应于本发明方法实施例中的基站，并且基站1200中的各个模块的上述和其它操作和/或功能分别为了实现图18中的方法的相应流程，为了简洁，在此不再赘述。
图21示出了本发明实施例提供的终端设备1300，该终端设备1300包括接收器1330、处理器1310、发送器1320、存储器1340和总线系统1350。其中，接收器1330、处理器1310、发送器1320和存储器1340通过总线系统1350相连，该存储器1340用于存储指令，该处理器1310用于执行该存储器1340存储的指令，以控制该接收器1310接收信号，并控制该发送器1320发送指令。
其中，接收器1330用于接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内MTCH的配置信息的集合，其中该集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
处理器1310用于根据该小区组播配置信息获取小区中MTCH。
具体地，本发明实施例中，终端设备可以接收基站发送的小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括邻小区信息、该SC-MTCH的非连续接收DRX的配置信息和该SC-MTCH的会话SessionID 对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
可选地，在本发明实施例中，该小区组播配置信息可以承载于组播控制信道MCCH或SC-MCCH中，可以被基站在预设搜索空间中使用DCI动态调度，也可以使用系统广播信息半静态调度。
具体地，在本发明实施例中，终端设备接入小区后，检测SC-MCCH对应的搜索空间，从该搜索空间中获取调度该SC-MCCH的DCI，终端设备通过该DCI获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。或者，如果SC-MCCH为系统消息半静态调度，则所述终端在读取到SIB后，根据SIB中的调度信息，在对应资源上获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。
可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，从基站获取MIB和SIB，在该SIB中可以包括该小区组播配置信息。
应理解，终端设备1300可以具体为上述实施例中的终端设备，并且可以用于执行上述方法实施例中与终端设备对应的各个步骤和/或流程。可选地，该存储器1340可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器1310可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
图22示出了本发明实施例提供的基站1400，该基站1400包括接收器 1430、处理器1410、发送器1420、存储器1440和总线系统1450。其中，接收器1430、处理器1410、发送器1420和存储器1440通过总线系统1450相连，该存储器1440用于存储指令，该处理器1410用于执行该存储器1440存储的指令，以控制该接收器1410接收信号，并控制该发送器1420发送指令。
其中，处理器1410用于生成小区组播配置信息，该小区组播配置信息包括小区内MTCH的配置信息的集合，其中该集合中每个MTCH的配置信息包括该每个MTCH的下行物理控制信道PDCCH搜索搜索空间的配置信息发送器1420，用于向终端设备发送该小区组播配置信息。
具体地，本发明实施例中，基站可以生成小区组播配置信息，该小区组播配置信息包括小区内至少一个SC-MTCH的配置信息的集合，该集合中每个SC-MTCH的配置信息包括该每个SC-MTCH的PDCCH搜索空间的配置信息；该终端设备根据该小区组播配置信息获取小区中SC-MTCH。在该SC-MTCH的配置信息中，还可以包括邻小区信息、该SC-MTCH的非连续接收DRX的配置信息和该SC-MTCH的会话SessionID对应的组播无线网络临时标识G-RNTI等，对此本发明实施例不做限定。
具体地，在本发明实施例中，该MTCH的PDCCH的搜索空间配置信息可以包括下列信息中至少一种：
该MTCH的下行物理控制信道候选(PDCCH Candidate，简称“PDCCH Candidate”)的最大重复传输次数Rmax、该MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
应理解，该MTCH的PDCCH的搜索空间配置信息可以包括其他信息，对此本发明实施例不做限定。
具体地，在本发明实施例中，不同的MTCH具有不同的MTCH搜索空间。
可选地，在本发明实施例中，该小区组播配置信息可以承载于组播控制信道MCCH或SC-MCCH中，可以被基站在预设搜索空间中使用DCI动态调度，也可以使用系统广播信息半静态调度。
具体地，在本发明实施例中，终端设备接入小区后，检测SC-MCCH对应的搜索空间，从该搜索空间中获取调度该SC-MCCH的DCI，终端设备通过该DCI获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配 置信息。或者，如果SC-MCCH为系统消息半静态调度，则所述终端在读取到SIB后，根据SIB中的调度信息，在对应资源上获取基站发送的SC-MCCH，在该SC-MCCH中包括该小区组播配置信息。可选地，在本发明实施例中，该小区组播配置信息可以承载在系统信息块SIB中。
具体地，在本发明实施例中，终端设备接入小区后，基站向终端设备发送MIB和SIB，在该SIB中可以包括该小区组播配置信息。
应理解，设备1400可以具体为上述实施例中的终端设备，并且可以用于执行上述方法实施例中与终端设备对应的各个步骤和/或流程。可选地，该存储器1440可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器1410可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
在CIoT系统中，对于功耗和终端成本的要求较高的终端设备，其能力往往是受限制的。处于空闲(IDLE)态的该类终端设备在接收组播业务的同时，往往没有能力同时监听并接收寻呼信息。例如对于NB-IoT系统而言，NB-IoT终端如果需要监听SC-PTM组播业务，则需要在SC-MTCH所在的物理资源块(Physical Resource Block，简称“PRB”)内(记为PRB1)上持续监听SC-MTCH的搜索空间，并根据检测到的DCI接收SC-MTCH。如果此时NB-IoT终端设备处于空闲状态，而该小区内的寻呼消息都只在PRB2上发送，则所述NB-IoT终端在对应的寻呼时机(Paging Occasion，简称“PO”)上无法同时接收PRB1上的组播业务和PRB上可能发送的寻呼消息。这是，由于NB-IoT终端的带宽为一个PRB，即NB-IoT终端仅能同时在一个PRB上工作。因此，在NB-IoT中当引入基于SC-PTM的组播业务时，需要解决终端设备如何接收寻呼的问题。
作为本发明的一个实施例，处于空闲态的NB-IoT终端在接收组播业务的同时，每次到了自己的寻呼时刻(Paging Occasion，简称“PO”)时，如果其正在接收单小区组播控制信道(Single Cell Multicast Control Channel，简称“SC-MCCH”)或单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)SC-MTCH，每次NB-IoT终端在寻呼时刻都优先接收寻呼消息，该终端设备将停止接收当前正在接收的SC-MCCH或 SC-MTCH，而在其寻呼对应的公共搜索空间(Common Search Space，简称“CSS”)上检测其是否被寻呼。
本发明提供了一种基于组播的无线通信方法，以解决由于终端设备每次到了自己的PO后都会停止接收当前正在接收的SC-MCCH或SC-MTCH，而到其寻呼消息所在的PRB上接收可能存在的寻呼信息，从而对当前正在接收的组播业务造成较大的影响的问题。
图23示出了本发明基于组播的无线通信方法，该方法包括：
S910，终端设备在接收组播业务信道MTCH或组播控制信道MCCH的过程中，接收基站发送的下行控制信息DCI，该DCI用于调度该MTCH或该MCCH，该DCI包括指示信息，该指示信息用于指示该终端设备在预设时频资源内是否存在寻呼；
S920，如果该终端设备确定在该预设时频资源内不存在寻呼被调度，该终端设备在该预设时频资源内不监听对应寻呼的搜索空间；如果该终端设备确定在该预设时频资源内存在寻呼被调度，且该终端设备在该预设时频资源内存在至少一个寻呼机会时，该终端设备在该寻呼机会上监听对应于寻呼的搜索空间，停止接收该MTCH或该MCCH。
本发明实施例通过在调度MTCH或MCCH的DCI中包括的指示信息来指示该终端设备在预设时频资源内是否存在寻呼，如果在预设时频资源内不存在寻呼，该终端设备在预设时频资源内不监听对应寻呼的搜索空间，该终端设备在该目标寻呼时刻可以不接收该终端设备的寻呼消息，而是继续监听SC-MTCH的搜索空间或SC-MCCH的搜索空间，并根据SC-MTCH或SC-MCCH对应的DCI继续接收SC-MTCH或SC-MCCH，避免了在目标寻呼时机PO没有针对该移动终端的寻呼消息时，该移动终端仍然停止接收SC-MCCH或SC-MTCH而对组播业务造成较大影响。
具体地，在本发明实施例中，该终端设备在接收SC-MTCH或SC-MCCH过程中，首先在NPDCCH的对应的搜索空间中检测用于调度SC-MCCH或MTCH的DCI。应理解，在本发明实施例中，当终端设备在NPDCCH对应的搜索空间中持续监听用于调度SC-MTCH的DCI时，没有能力同时检测用于调度寻呼消息的DCI。因此，当终端设备在NPDCCH的对应搜索空间中检测用于调度SC-MTCH的DCI时，可以在该调度SC-MTCH的DCI中包括用于指示终端设备在预设时频资源内是否被寻呼的指示信息，或当终端设 备在NPDCCH的对应搜索空间中监听用于调度SC-MCCH的DCI时，可以在调度该SC-MCCH的DCI中包括用于指示终端设备在预设时频资源内是否被寻呼的指示信息。
应理解，在本发明实施例中，该用于指示终端设备在预设时频资源内是否被寻呼的指示信息可以既可以包含于调度SC-MCCH的DCI中，也可以同时包含于调度SC-MTCH的DCI中。终端设备根据其业务需求，在NPDCCH的分别对应于SC-MCCH和SC-MTCH的搜索空间中监听调度SC-MCCH的第一DCI和调度SC-MTCH的第二DCI，在第一DCI和第二DCI中均可以包括指示在预设时频资源内是否存在寻呼的指示信息。该终端设备可以根据第一DCI中的指示信息或第二DCI中的指示信息，决定在预设时频资源内是否检测和接收寻呼消息。如果该终端设备确定在该预设时频资源内存在寻呼，且该终端设备在该预设时频资源内存在至少一个寻呼机会PO时，该终端设备在该寻呼机会PO上监听对应于寻呼的搜索空间，并可以停止接收所述MTCH或所述MCCH；如果该终端设备确定在该预设时频资源内不存在寻呼，该终端设备在该预设时频资源内不监听对应寻呼的搜索空间，从而避免了在预设时频资源内没有该终端设备的寻呼消息时，该终端设备仍然停止当前正在接收的SC-MTCH或SC-MCCH而对组播业务的接收产生较大影响。
具体地，在SC-PTM技术中，在终端设备接收基站发送的SC-MTCH或SC-MTCH过程中，该终端设备可以在NPDCCH对应的搜索空间中监听用于调度SC-MCCH的DCI或者监听用于调度SC-MTCH的DCI。应理解，对应于SC-MCCH的搜索空间可以由系统消息配置，而该SC-MTCH的搜索空间可以由当前小区组播配置消息中对应于该SC-MTCH的组播配置信息来配置。当终端设备在监听用于调度SC-MCCH的DCI时，可以在该调度SC-MCCH的DCI中包括至少一个bit的指示域。例如，当该指示域中第0位bit的值为1时，该指示信息指示该终端设备在预设时频资源内被寻呼，或当该第0位bit的值为0时，该指示信息指示该终端设备在预设时频资源内没有被寻呼。当然，也可以通过调度SC-MTCH的DCI中包括至少一个bit的指示域来指示该终端设备在预设时频资源内是否被寻呼。
可选地，所述预设时频资源为预设周期内用于发送寻呼的时频资源；或者所述预设时频资源为所述DCI所调度的SC-MTCH或SC-MCCH所占用时 间段内用于发送寻呼的时频资源。
终端设备在接收基站发送的SC-MTCH或者SC-MCCH的过程中，可以通过检测NPDCCH中调度SC-MCCH或者SC-MTCH的DCI中的指示信息，获知该终端设备在预设时频资源内是否被寻呼。例如，图24示出了用于调度SC-MTCH的DCI中包括3个bit的指示域。假定该终端设备为图24第一终端设备，该第一终端设备通过检测该DCI中包括指示信息的第0位bit，当该第0位bit为1时，指示信息指示该第一终端设备在预设时频资源内被寻呼，当第0位bit为0时，指示信息指示该第一终端设备在预设时频资源内刻没有被寻呼。应理解，该预设时频资源为预设周期内用于发送寻呼的时频资源，也可以为终端设备接收SC-MTCH或SC-MCCH所占用的时间内用于发送寻呼的时频资源。
可选地，在本发明实施例中，该指示信息的指示域位置可以具体与终端设备的设备标识按照预设规则进行映射。终端在接收SC-MTCH或SC-MCCH的过程中，可以根据终端设备的专属地址(Identification，简称“ID”)，映射得到和该终端设备对应的指示域位置，然后通过检查所述调度SC-MTCH或SC-MCCH的DCI中的所述映射得到的指示域位置，进一步确定在预设时频资源内是否会被寻呼。例如，图24示出了用于调度SC-MTCH的DCI中包括3个bit的指示域。对于图24中的第一终端设备，其设备ID根据预设规则映射得到的对应的指示域位置可以为第0位bit，则第一终端设备在调度SC-MTCH的DCI中可以检查第0位指示域信息，进而可以确定在预设的下一个周期内所述终端是否会被寻呼。应理解，第二终端设备可以根据其设备ID按照预设规则映射得到与其对应的指示域位置为第1位bit，而第三终端可以根据自己的设备ID按照预设规则映射得到与其对应的指示域位置为第2位bit，该第二终端和第三终端则可以检查所述用于调度SC-MTCH的DCI中对应指示域中的第1位bit和第2位bit。如果对应于终端设备的bit设定为1，则指示信息指示该终端设备在预设时频资源内的寻呼时机PO上存在寻呼，因此该终端设备将可以在对应寻呼时机PO上停止接收组播业务而接收寻呼信息；当对应与终端设备的bit设定为0，终端可以获知在预设时频资源内不存在寻呼，则该终端设备在该预设时频资源内停止监听对应寻呼的搜索空间，而继续接收组播业务。当然，图24仅仅示出了调度SC-MTCH的DCI中包括3个bit来指示终端设备是否被寻呼，但本 发明实施例不限于此。
因此，在本发明实施例中，在调度SC-MTCH的DCI可以添加至少一个bit的，该至少一个bit中每个bit的位置可以通过预设规则来对应不同终端设备，例如，图24所示，该用于调度SC-MTCH的DCI中的3个bit中第0位的bit用于指示该第一终端设备的设备标识，第2位的bit用于指示第三终端设备的设备标识。当然，在调度SC-MCCH的DCI中可以采用相同的方法来指示，为了简洁，在此不再赘述。
应理解，在本发明实施例中，该DCI中至少一个bit的bit位置还可以与不同时频资源的索引号对应。例如，在本发明实施例中，第0位的bit可以对应资源号索引值为0的时频资源，第1位的bit可以对应资源号索引值为1的时频资源，对此本发明不做限定。
可选地，在本发明实施例中，用于调度SC-MCCH或SC-MTCH的DCI中至少一个bit中bit的位置与不同资源索引号之间可以通过取模映射建立对应关系。
应理解，在本发明实施例中，在调度SC-MTCH的DCI中的至少一个bit的指示域还可以通过其他规则与不同资源块之间建立对应关系，对此本发明不做限定，例如还可以根据终端设备的设备标识ID的哈希值来设定该DCI中至少一个bit与不同资源块之间的对应关系。
还应理解，在本发明实施例中，调度SC-MTCH的DCI中包括指示信息与调度SC-MTCH中的DCI包括指示信息的方式可以相同，为了申请文件的简洁，在此不再赘述。
具体地，在本发明实施例中，当终端设备在PDCCH的搜索空间中监听调度MCCH的DCI时，该DCI中包括指示该终端设备在预设时频资源内的寻呼时机PO是否被寻呼。
可选地，在本发明实施例中，所述预设时频资源可以是该终端设备在接收当前组播业务的所在的SC-MCCH变更周期(modification period，简称“MP”)的下一MP中的寻呼时机上对应的寻呼消息和用于调度寻呼消息的DCI可能占用的时频资源。
可选地，在本发明实施例中，所述预设时频资源可以是该终端设备在接收当前组播业务的所在的SC-MCCH下一RP中的寻呼时机上对应的寻呼消息和用于调度寻呼消息的DCI可能占用的时频资源。
上面从终端设备侧详细描述了本发明实施例的基于组播的无线通信方法，下面将从基站侧详细描述本发明实施例的基于组播的无线通信方法。
图25示出了本发明基于组播的无线通信方法，该方法包括：
S1010，基站生成下行控制信息DCI，所述DCI用于调度组播业务信道MTCH或组播控制信道MCCH，所述DCI包括指示信息，所述指示信息用于指示预设时频资源内是否存在寻呼；
S1020，该基站向该终端设备发送该DCI。
本发明的技术方案，基站生成的调度SC-MTCH和SC-MCCH的DCI中包括指示信息，该指示信息用于指示终端设备在预设时频资源内是否被寻呼，避免了终端设备在预设时频资源内基站并没有针对该移动终端的寻呼消息时，该移动终端仍然停止接收MCCH或MTCH而对组播业务造成较大影响。
应理解，在本发明实施例中，该指示信息用于指示终端设备在预设时频资源内的PO上是否存在寻呼，对于其具体实现可以参见终端设备侧相关描述，为了申请文件的简洁，在此不再赘述。
上面详细描述了本发明实施例的基于组播的无线通信方法，下面将详细描述本发明实施例的基于组播的无线通信装置。
图26示出了本发明实施例的终端设备1500，该终端设备1500包括：
接收模块1510，用于接收基站发送的下行控制信息DCI，所述DCI用于调度所述MTCH或所述MCCH，所述DCI包括指示信息，所述指示信息用于指示所述终端设备在预设时频资源内是否存在寻呼；
处理模块1520，用于当所述终端设备确定在所述预设时频资源内不存在寻呼被调度时，所述终端设备在所述预设时频资源内不监听对应寻呼的搜索空间；或当所述终端设备确定在所述预设时频资源内存在寻呼被调度，且所述终端设备在所述预设时频资源内存在至少一个寻呼机会时，所述终端设备在所述寻呼机会上监听对应于寻呼的搜索空间，停止接收所述MTCH或所述MCCH。
本发明实施例通过在调度MTCH或MCCH的DCI中包括的指示信息来指示该终端设备在预设时频资源内是否存在寻呼，如果在预设时频资源内不存在寻呼，该终端设备在预设时频资源内不监听对应寻呼的搜索空间，该终端设备在该目标寻呼时刻不接收该终端设备的寻呼消息，而是继续监听 SC-MTCH的搜索空间或SC-MCCH的搜索空间，继续接收SC-MTCH或SC-MCCH，避免了在目标寻呼时刻PO没有针对该移动终端的寻呼消息时，该移动终端仍然停止接收SC-MCCH或SC-MTCH而对组播业务造成较大影响。
可选地，所述预设时频资源为预设周期内用于发送寻呼的时频资源；或者所述预设时频资源为该终端设备接收SC-MTCH或SC-MCCH所占用时间段内用于发送寻呼的时频资源。
图27示出了根据本发明实施例的基站1600，该装置可以是与终端设备进行通信的基站，该基站1600包括：
处理模块1610，用于生成下行控制信息DCI，所述DCI用于调度组播业务信道MTCH或组播控制信道MCCH，所述DCI包括指示信息，所述指示信息用于指示预设时频资源内是否存在寻呼；
发送模块1620，用于向终端设备发送所述指示信息。
本发明的技术方案，基站生成的调度SC-MTCH和SC-MCCH的DCI中包括指示信息，该指示信息用于指示终端设备在预设时频资源内是否被寻呼，避免了终端设备在预设时频资源内基站并没有针对该移动终端的寻呼消息时，该移动终端仍然停止接收MCCH或MTCH而对组播业务造成较大影响。
还应理解，基站1600中的各个模块的上述和其它操作和/或功能分别为了实现图25中的方法的相应流程，为了简洁，在此不再赘述。
图28示出了本发明实施例提供的终端设备1700，该终端设备1700包括接收器1730、处理器1710、发送器1720、存储器1740和总线系统1750。其中，接收器1730、处理器1710、发送器1720和存储器1740通过总线系统1750相连，该存储器1740用于存储指令，该处理器1710用于执行该存储器1740存储的指令，以控制该接收器1730接收信号，并控制该发送器1720发送指令。
其中，接收器1730用于接收基站发送的下行控制信息DCI，所述DCI用于调度所述MTCH或所述MCCH，所述DCI包括指示信息，所述指示信息用于指示所述终端设备预设时频资源内是否存在寻呼；
处理器1710用于当所述终端设备确定在所述预设时频资源内不存在寻呼被调度时，所述终端设备在所述预设时频资源内停止监听对应寻呼的搜索 空间；或当所述终端设备确定在所述预设时频资源内存在寻呼被调度时，且所述终端设备在所述预设时频资源内存在至少一个寻呼机会PO时，所述终端设备在所述寻呼机会上监听对应于寻呼的搜索空间，停止接收所述MTCH或所述MCCH。。
可选地，所述预设时频资源为预设周期内用于发送寻呼的时频资源；或者所述预设时频资源为所述DCI所调度的SC-MTCH或SC-MCCH所占用时间段内用于发送寻呼的时频资源。
可选地，该存储器1740可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器1710可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
图29示出了本发明实施例提供的基站1800，该基站1800包括接收器1830、处理器1810、发送器1820、存储器1840和总线系统1850。其中，接收器1830、处理器1810、发送器1820和存储器1840通过总线系统1850相连，该存储器1840用于存储指令，该处理器1810用于执行该存储器1840存储的指令，以控制该接收器1830接收信号，并控制该发送器1820发送指令。
其中，处理器1810用于生成下行控制信息DCI，所述DCI用于调度组播业务信道MTCH或组播控制信道MCCH，所述DCI包括指示信息，所述指示信息用于指示预设时频资源内是否存在寻呼；；
发送器1820用于向所述终端设备发送所述DCI。
可选地，所述预设时频资源为预设周期内用于发送寻呼的时频资源；或者所述预设时频资源为所述DCI所调度的SC-MTCH或SC-MCCH所占用时间段内用于发送寻呼的时频资源。
可选地，该存储器1840可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器1810可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤和/或流程。
图30示出了本发明实施例提供的基于组播的无线通信方法，该方法可 以应用于图1所述的通信系统，但本发明实施例不限于此。该方法包括：
S3010，终端设备接收基站发送的下行控制信息DCI，该DCI用于调度当前组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该当前MTCH的配置信息在指示变更周期MP发生改变；
S3020，该终端设备根据该指示信息获取变更后的当前MTCH的配置信息。
在接收组播业务的过程中，终端设备会接收基站发送的用于调度当前MTCH的DCI，并基于该DCI获取承载在MTCH中的组播业务数据，本发明实施例的方案在该DCI中添加了指示信息，指示当前MTCH的配置信息是否发生改变，也就是说，终端设备无需检测MCCH的搜索空间或接收MCCH就可以获知当前MTCH的配置信息是否发生改变，从而确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
在本发明实施例中，MTCH的配置信息可以包括该MTCH的PDCCH搜索空间的配置信息。应理解，在本发明实施例中，该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息、该MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，对此本发明实施例不做限定。
应理解，本发明实施例可应用于处理组播业务，该组播业务例如可以是多媒体广播多播业务(Multimedia Broadcast Multicast Service，简称MBMS)和/或SC-PTM中的组播业务。在本发明实施例中，除特殊说明外，MTCH和SC-MTCH、MCCH和SC-MCCH之间均可以互换。
应理解，所述指示变更周期为根据指示信息确定的某个变更周期。例如，假如指示信息为2bit，则其中“01”指示该当前MTCH的配置信息在下一个MP内发生改变(即本MP之后的第一个MP)，“10”表示该当前MTCH的配置信息在本MP之后的第二个MP发生变化，而“11”表示该当前MTCH的配置信息在本MP之后的第三个MP发生变化，而而“00”表示该当前MTCH的配置信息在本MP之后的三个MP内均不发生变化。不失一般性，以上2bit的编码方式可以互换，本发明并不仅限于该例子中的对应方式。
下面将以SC-PTM技术为例，对本发明实施例进行详细说明，但应理解，本发明实施例还可以应用于其他组播技术中。
在本发明实施例中，功能结构简单的终端设备，例如，智能水表或电表 等上的抄表模块，由于能力有限，在接收当前SC-MTCH该终端设备无法同时接收SC-MCCH(或无法检测其他搜索空间，如SC-MCCH的搜索空间)。对于已经开始接收当前组播业务的终端设备，该终端设备可以根据已经获取的组播业务的配置信息，在对应搜索空间中监听用于调度当前SC-MTCH的DCI，该终端设备根据调度SC-MTCH的DCI，接收基站发送的SC-MTCH。进一步地，在本发明中实施例中，该调度SC-MTCH的DCI可以包括指示信息，该指示信息用于指示该当前SC-MTCH的配置信息在指示MP发生改变。
在本发明实施例中，该SC-MTCH的配置信息可以包括调度该SC-MTCH的搜索空间的配置信息。应理解，在本发明实施例中，该SC-MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该SC-MTCH的DRX的配置信息，该SC-MTCH的会话Session ID对应的G-RNTI、该SC-MTCH调度信息和邻小区信息等。
本发明实施例中，终端设备接收当前组播业务之前或过程中，终端设备可以根据当前组播业务的会话Session ID，确定对应该Session ID的G-RNTI，根据已经获取的当前组播业务的配置信息，在PDCCH中检测用于调度当前SC-MTCH的DCI，该DCI可以用对应于该Session ID的G-RNTI进行CRC加掩或加扰，该终端设备根据该DCI接收基站发送的SC-MTCH。进一步地，在本发明实施例中，该DCI可以包括指示信息，该指示信息用于指示当前SC-MTCH的配置信息在指示MP发生改变。
具体地，在本发明实施例中，上述DCI中的指示信息可以是该DCI中的2bit指示域，则当指示域为“01”指示该当前MTCH的配置信息在下一个MP内发生改变(即本MP之后的第一个MP)，为“10”表示该当前MTCH的配置信息在本MP之后的第二个MP发生变化，为“11”表示该当前MTCH的配置信息在本MP之后的第三个MP发生变化，而为“00”表示该当前MTCH的配置信息在本MP之后的三个MP内均不发生变化。不失一般性，以上2bit的编码方式可以互换，本发明并不仅限于该例子中的对应方式。。
应理解，在本发明实施例中，利用调度该当前SC-MTCH的DCI中的指示信息来指示该当前SC-MTCH的配置信息在指示MP发生改变，该指示信息可以承载在该DCI的至少一个bit中，上面举例说明仅仅是本发明的一种具体实现方式，但本发明实施例不限于此。例如，该调度SC-MTCH的DCI中可以包括3个bit，该3个bit的任意bit的二进制组合都可以指示该当前 SC-MTCH在指示MP发生改变。
应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示，本发明实施例对此不做限定。
应理解，在本发明之前或之后的各个实施例中，其中变更周期MP可以指如图4中的MCCH的变更周期MP，或者也可以指针对SC-MTCH定义的SC-MTCH配置信息变更周期MP。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP，可以和MCCH的变更周期相等或者是MCCH的变更周期的数倍。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP可以通过系统消息进行配置，或者在SC-MCCH中进行配置。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP可以针对每个MTCH进行独立配置，也可以一个小区中所有的SC-MTCH使用相同的SC-MTCH配置信息变更周期MP。
图31示出了本发明实施例的终端设备接收组播业务示意图。本发明实施例以NB-IoT系统为例，但是也适用于其他通信系统。因此，虽然本发明实施例采用NPDSCH和NPDCCH描述物理层信道，但是也可将其替换成系统的对应物理层信道，例如PDSCH和PDCCH。由图4可以看出，承载组播业务的SC-MTCH和承载组播业务配置信息的SC-MCCH在NPDSCH上发送，SC-MCCH和SC-MTCH通过承载在NPDCCH上的DCI来调度传输。
在本发明实施例中，针对SC-MTCH和SC-MCCH可以定义不同的搜索空间，对于调度SC-MTCH和SC-MCCH的DCI格式可以不同。由图4可以看出调度SC-MTCH和SC-MCCH的DCI分别在SC-MTCH的和SC-MCCH的搜索空间中发送。应理解，作为一种具体的实现方式，SC-MTCH的搜索空间与SC-MCCH的搜索空间可以配被置为重合。
终端设备在接收当前SC-MTCH或在NPDCCH的搜索空间中监听调度用于承载SC-MTCH的NPDSCH的DCI的过程中，无法同时接收NPDSCH上承载的SC-MCCH或在用于调度SC-MCCH的搜索空间中监听调度用于承载SC-MCCH的NPDSCH的DCI。在本实施例中，在该终端设备接收当前SC-MTCH过程中，在调度用于承载该SC-MTCH的NPDSCH的DCI中加入指示信息，该指示信息可以指示当前SC-MTCH对应的组播业务的配置信 息在指示MP中发生改变。当该指示信息指示当前SC-MTCH对应的组播业务的配置信息在指示MP中发生改变时，该终端设备在指示MP内停止当前SC-MTCH的接收，在用于调度承载SC-MCCH的NPDSCH的搜索空间中监听调度SC-MCCH的DCI，根据该DCI重新获取SC-MCCH，根据该SC-MCCH获取组播业务变更后配置信息。
应理解，在本发明实施例中，该指示信息还可以指示当前SC-MTCH的配置信息在指示MP没有发生改变。此时，终端设备可以按照当前SC-MTCH的配置信息继续监听相关搜索空间并接收当前SC-MTCH。
可选地，在本发明实施例中，该调度当前MTCH的DCI中的指示信息还可以用于指示当前小区内其他MTCH的配置信息在指示MP发生改变。因此在接收当前组播的终端设备可以根据其实现来确定是否重新读取当前小区组播配置信息，从而提高系统的灵活性。
应理解，该其他MTCH可以为当前小区中除去终端设备正在接收的当前MTCH之外的其他MTCH。其他MTCH可以是终端设备没有使用的MTCH。
通过本发明的实施例，终端设备只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息是否发生了改变，也可以获知到其他MTCH的配置信息是否发生了改变。因此，终端设备不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
具体地，在本发明实施例中，终端设备在接收该当前组播业务的过程中，接收基站发送的调度该当前SC-MTCH的DCI，该DCI中的指示信息还可用于指示其他SC-MCTH的配置信息在指示MP发生发生改变。例如，可以在DCI中引入至少一个bit的指示域，当指示域的值为1时，该指示信息指示其他SC-MTCH的配置信息在指示MP发生改变，当指示域的值为0时，该指示信息指示其他MTCH的配置信息在指示MP没有发生改变。因此，该终端设备可以根据该指示信息确定是否需要重新获取变更后的配置信息，从而提高了系统的灵活性。不失一般性，所述指示MP可以预先规定，比如规定为当前MP之后的第一个MP。
应理解，在本发明实施例中，该DCI还可以包括2个bit的指示域，则 当指示域为“01”指示该其他MTCH的配置信息在下一个MP内发生改变(即本MP之后的第一个MP)，为“10”表示该其他MTCH的配置信息在本MP之后的第二个MP发生变化，为“11”表示该其他MTCH的配置信息在本MP之后的第三个MP发生变化，而为“00”表示其他MTCH的配置信息在本MP之后的三个MP内均不发生变化。不失一般性，以上2bit的编码方式可以互换，本发明并不仅限于该例子中的对应方式。
还应理解，在调度当前SC-MTCH的DCI中包括的指示信息还可以用3个bit的任意二进制组合来指示。当然，以上仅仅是本发明的具体实现方式，但本发明实施例不限于此。
还应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示，本发明实施例对此不做限定。
还应理解，在本发明实施例中，该小区中其他MTCH的配置信息发生改变包括：小区当前已有的组播业务(可以是小区中的除终端设备的当前组播业务以外的任何已有的组播业务)的配置信息发生改变、小区内新增组播业务或删除已有组播业务。
还应理解，在本发明实施例中，该当前组播业务的配置信息和其他MTCH的配置信息承载在SC-MCCH逻辑信道中，其承载在NPDSCH上，并由DCI进行调度。该DCI可以在预设或预配置的搜索空间中发送，并且可以通过预设的UEID，例如SC-RNTI，进行CRC加掩。本发明实施例中，当终端设备根据该指示信息，确定需要在指示MP需要重新获取变更后的配置信息时，终端设备可以在NPDCCH上监听调度SC-MCCH的DCI，根据该DCI接收基站发送的SC-MCCH。该SC-MCCH中包括当前小区组播配置信息，该当前小区组播配置信息包含至少一个SC-MTCH的配置信息。这些SC-MTCH为在小区内正在进行组播的组播业务。终端通过重新获取该当前小区组播配置信息，可以获取该当前SC-MTCH的配置信息和其他正在组播的SC-MTCH的组播配置信息。
可选地，作为本发明的另一个实施例，调度当前SC-MTCH的DCI中包括的指示信息还用于指示当前小区组播配置信息在指示MP中发生改变。
具体地，在本发明实施例中，当前小区组播配置信息为该小区中至少一 个的组播业务信道MTCH的配置信息的集合或列表。进一步地，该MTCH的配置信息可以包括以下信息中的至少一种：该MTCH的搜索空间的配置信息、该MTCH的DRX的配置信息，该MTCH的会话Session ID对应的G-RNTI，该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，当前小区组播配置信息的改变可以包括以下中的至少一种：小区当前已有MTCH的配置信息发生改变、小区内新增MTCH和删除已有MTCH。
具体地，在本发明实施例中，终端设备在接收当前SC-MTCH的过程中，通过调度当前SC-MTCH的DCI中的指示信息可以获知当前小区组播配置信息在指示MP发生改变。例如，可以在调度当前SC-MTCH的DCI中引入2bit的指示域，则当指示域为“01”指示当前小区组播配置信息在下一个MP内发生改变(即本MP之后的第一个MP)，为“10”表示当前小区组播配置信息在本MP之后的第二个MP发生变化，为“11”表示当前小区组播配置信息在本MP之后的第三个MP发生变化，而为“00”表示当前小区组播配置信息在本MP之后的三个MP内均不发生变化。不失一般性，以上2bit的编码方式可以互换，本发明并不仅限于该例子中的对应方式。具体地，图31仅画出了指示域为“01”时的情况。
还应理解，调度当前SC-MTCH的DCI中的指示信息还可以用3个bit的任意二进制组合来指示当前小区中新增SC-MTCH和/或删除已有SC-MTCH。当然，以上仅仅是本发明实施例的具体实现方式，但本发明实施例不限于此。
还应理解，在本发明实施例中，该指示信息可以承载在调度当前SC-MTCH的DCI的现有字段中，也可以在该DCI中添加新的用于承载该指示信息的字段；此外，该指示信息可以采用隐性或显性指示的方式进行指示，本发明实施例对此不做限定。
应理解，在本发明之前或之后的各个实施例中，其中变更周期MP可以指如图31中的MCCH的变更周期MP，或者也可以指针对SC-MTCH定义的SC-MTCH配置信息变更周期MP。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP，可以和MCCH的变更周期相等或者是MCCH的变更周期的数倍。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期 MP可以通过系统消息进行配置，或者在SC-MCCH中进行配置。所述针对SC-MTCH定义的SC-MTCH配置信息变更周期MP可以针对每个MTCH进行独立配置，也可以一个小区中所有的SC-MTCH使用相同的SC-MTCH配置信息变更周期MP。
如图32所示，在本发明实施例中，可选地，在该终端设备接收该DCI之前，该方法还包括：
S3201，终端设备在物理下行控制信道监听用于调度该当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
具体地，在本发明实施例中，终端设备在接收基站发送的下行控制信息DCI之前，将在NPDCCH上监听用于调度当前SC-MTCH的DCI的搜索空间，而不监听调度SC-MCCH的DCI的搜索空间。
在S3201后，步骤S3210和S3220请参考之前的方法实施例中的S3010和S3020
上面结合图30至图32，从终端设备侧详细描述了本发明实施例的基于组播的无线通信方法，下面结合图6，从基站侧详细描述本发明实施例的基于组播的无线通信方法。应理解，基站侧的描述与终端设备侧的描述相互对应，类似的描述可以参照上文。
如图33所示，根据本发明实施例的基于组播的无线通信方法包括：
S3310，基站生成下行控制信息DCI，该DCI用于调度第一组播业务信道MTCH，该DCI包括指示信息，该指示信息用于指示该MTCH的配置信息在指示变更周期MP发生改变；
S3320，该基站向终端设备发送该DCI。
通过本发明的实施例，基站在调度MTCH的DCI中加入指示信息，该指示信息用于指示该MTCH的配置信息发生改变，因此终端设备只需要检测其正在接收的组播业务的MTCH对应的搜索空间，并从该该搜索空间中发送的DCI的指示信息中可以直接获知到当前组播业务的配置信息发生了改变，不需要读取额外的DCI就可以根据这些指示信息确定是否需要重新获取变更后的配置信息，提高了系统的灵活性。
在本发明实施例中，该MTCH的配置信息可以包括该MTCH的PDCCH搜索空间的配置信息。此外，该MTCH的配置信息还可以包括其他信息，例如，可以包括以下信息中的至少一种：该MTCH的DRX的配置信息、该 MTCH的会话Session ID对应的G-RNTI、该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，本发明实施例的内容主要适用于组播业务，包括多媒体广播多播业务(Multimedia Broadcast Multicast Service，简称MBMS)MBMS和SC-PTM，因此，在本发明实施例中，除特殊说明外，MTCH和SC-MTCH、MCCH和SC-MCCH之间均可以互换。
具体地，在本发明实施例中，基站生成下行控制信息DCI，该DCI包括指示信息，该指示信息可以具体用于指示SC-MTCH的配置信息在指示MP发生改变。该指示信息可以承载在该DCI中的2bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
可选地，在本发明实施例中，用于调度SC-MTCH的DCI中包括的指示信息还可用于指示第二SC-MTCH的配置信息在指示MP发生改变。具体地，在本发明实施例中，该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
应理解，在本发明实施例中，该第二SC-MTCH可以为当前小区中除去当前正在接收的第一SC-MTCH之外的SC-MTCH，例如可以是除前正在接收的第一SC-MTCH之外的所有SC-MTCH。
可选地，在本发明另一实施例中，用于调度SC-MTCH的DCI中的指示信息还可用于指示当前小区组播配置信息在指示MP中发生改变。具体地，在本发明实施例中，该指示信息可以承载在该DCI中至少一个bit中，对于具体实现可以参见终端设备侧相关描述，为了简洁，在此不再赘述。
该当前小区组播配置信息为该小区内所包括的组播业务信道MTCH的配置信息的集合或列表。进一步该MTCH的配置信息可以包括以下信息中的至少一种：该MTCH的搜索空间的配置信息、该MTCH的DRX的配置信息，该MTCH的会话Session ID对应的G-RNTI，该MTCH调度信息和邻小区信息等，本发明实施例对此不做具体限定。
应理解，该当前小区组播配置信息的改变包括以下中的至少一种：当前小区已有组播业务的配置信息发生改变、小区内新增组播业务或删除小区内已有组播业务。
作为本发明的一个实施例，处于空闲态的NB-IoT终端在接收组播业务的同时，每次到了自己的寻呼时刻(Paging Occasion，简称“PO”)时，如 果其正在接收单小区组播控制信道(Single Cell Multicast Control Channel，简称“SC-MCCH”)或单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)SC-MTCH，如果每次NB-IoT终端在寻呼时刻都优先接收寻呼消息，该终端设备将停止接收当前正在接收的SC-MCCH或SC-MTCH，而在其寻呼对应的公共搜索空间(Common Search Space，简称“CSS”)上检测其是否被寻呼。
然而，如果终端设备每次到了自己的PO后都会停止接收当前正在接收的SC-MCCH或SC-MTCH，而到其寻呼消息所在的PRB上接收可能存在的寻呼信息，这会对当前正在接收的组播业务造成较大的影响：和Paging在时间上相重叠的组播包由于无法接收将会被丢弃，从而影响组播业务的可靠传播。
另一方面，如果终端设备每次在接收单小区组播业务信道(Single Cell Multicast Traffic Channel，简称“SC-MTCH”)SC-MTCH时都不会在对应PO上检测调度寻呼报文的DCI并读取相应的寻呼报文，这时会造成网络无法和终端取得联系并进行必要的通信过程。对某些业务类型来说，这将是无法容忍或对用户体验造成很大的影响。例如，对于抄表业务，当某些用户在欠费后，煤气或电力公司会暂时停止所述用户的供气或电力服务，直到用户缴清费用后才会恢复煤气或电力服务。然而，一旦用户缴清费用后，所述服务提供商需要在尽可能短的时间内恢复煤气和电力供应，否则会严重影响用户的使用体验。对于这些抄表类业务，NB-IoT系统可能使用组播SC-PTM对终端设备进行软件或固件升级，因此在某段时间内所述NB-IoT设备可能进行软件升级。如果在接收软件升级包的组播过程中，无法接收网络发起的寻呼消息，那么网络则无法及时的对已停用的煤气表或电表进行充值并恢复服务，从而严重影响用户的体验。
本发明提供了一种基于组播的无线通信方法，以针对不同的情况，指示终端是否需要在组播过程中接收。
图34示出了本发明实施例的另一基于组播的无线通信方法，该方法包括：
S3410，终端设备接收基站发送的指示信息，该指示信息用于指示该终端设备在接收组播业务信道SC-MTCH的过程中是否接收寻呼消息；
S3420，如果该终端设备根据所述指示信息确定在接收组播业务信道 SC-MTCH的过程中不接收寻呼消息，则该终端设备在接收组播业务信道SC-MTCH的过程中不监听对应寻呼的搜索空间也不接收任何寻呼消息；如果该终端设备确定在接收组播业务信道SC-MTCH的过程中接收寻呼消息，则所述终端设备在接收组播业务信道SC-MTCH的过程中，在所述终端的寻呼机会上监听对应于寻呼的搜索空间，停止接收该MTCH。
本发明实施例通过指示信息来指示终端设备在接收组播业务信道SC-MTCH的过程中是否接收寻呼：如果终端设备确定在在接收组播业务信道SC-MTCH的过程中不接收寻呼消息，该终端设备接收组播业务信道SC-MTCH的过程中不监听对应寻呼的搜索空间也不接收任何寻呼消息，而是继续监听SC-MTCH的搜索空间，并根据SC-MTCH对应的DCI继续接收SC-MTCH；如果终端设备确定在接收组播业务信道SC-MTCH的过程中接收寻呼消息，该终端设备在接收组播业务信道SC-MTCH的过程中的所述终端的寻呼机会上监听对应于寻呼的搜索空间，停止接收该MTCH。
所述方法，使得基站可以通过指示信息指示终端是否在接收SC-MTCH的过程中接收寻呼消息：当基站可以通过调度或私有实现方案，可以保证终端的寻呼消息和用于寻呼的搜索空间不会与所述SC-MTCH在时间上重叠时，基站可以发送指示消息指示终端设备在接收组播业务信道SC-MTCH的过程中接收寻呼消息；当基站无法保证终端的寻呼消息和用于寻呼的搜索空间不会与SC-MTCH在时间上重叠，并且基站认为组播业务的成功率较为重要时，基站可以发送指示消息指示终端设备在接收组播业务信道SC-MTCH的过程中不接收寻呼消息。通过这样的方式，使得基站具有较高的灵活性，保证了不同业务需求时性能较优。
应理解，所述指示信息可以分别针对不同的SC-MTCH进行配置，也可以针对所有小区内正在发送的SC-MTCH配置；所示指示信息可以发送在系统消息中，或发送在SC-MCCH中。
应理解，当终端设备的寻呼机会或寻呼消息与组播控制信道SC-MCCH在时间上相重叠时，终端设备总是优先监听寻呼机会或接收寻呼消息，而放弃接收相重叠的SC-MCCH。
图35示出了本发明实施例的另一基于组播的无线通信方法，该方法包括：
S3510，基站生成指示信息，所述指示信息用于指示终端设备在接收组 播业务信道SC-MTCH的过程中是否接收寻呼消息；
S3520，该基站向终端设备发送所述指示消息。
本发明技术方案，基站生成指示信息，该指示信息用于指示终端设备在接收组播业务信道SC-MTCH的过程中是否接收寻呼消息。若指示信息指示终端设备在接收组播业务信道SC-MTCH的过程中不接收寻呼，则接收到指示信息的终端设备在接收组播业务信道SC-MTCH的过程中不接收寻呼消息，所述终端设备接收组播业务信道SC-MTCH的过程中不监听对应寻呼的搜索空间也不接收任何寻呼消息，而是继续监听SC-MTCH的搜索空间，并根据SC-MTCH对应的DCI继续接收SC-MTCH；若指示信息指示终端设备在接收组播业务信道SC-MTCH的过程中接收寻呼消息，接收到指示信息的终端设备在接收组播业务信道SC-MTCH的过程中，在所述终端的寻呼机会上监听对应于寻呼的搜索空间，停止接收该MTCH。
所述方法，使得基站可以通过指示信息指示终端是否在接收SC-MTCH的过程中接收寻呼消息：当基站可以通过调度或私有实现方案，可以保证终端的寻呼消息和用于寻呼的搜索空间不会与所述SC-MTCH在时间上重叠时，基站可以发送指示消息指示终端设备在接收组播业务信道SC-MTCH的过程中接收寻呼消息；当基站无法保证终端的寻呼消息和用于寻呼的搜索空间不会与SC-MTCH在时间上重叠，并且基站认为组播业务的成功率较为重要时，基站可以发送指示消息指示终端设备在接收组播业务信道SC-MTCH的过程中不接收寻呼消息。通过这样的方式，使得基站具有较高的灵活性，保证了不同业务需求时性能较优。
应理解，所述指示信息可以分别针对不同的SC-MTCH进行配置，也可以针对所有小区内正在发送的SC-MTCH配置；所示指示信息可以发送在系统消息中，或发送在SC-MCCH中。
应理解，当终端设备的寻呼机会或寻呼消息与组播控制信道SC-MCCH在时间上相重叠时，终端设备总是优先监听寻呼机会或接收寻呼消息，而放弃接收相重叠的SC-MCCH。
其他具体的处理过程可参考终端设备一侧的描述，基站的对应处理方式与终端一侧的处理方式相配合实现本实施例所述方法。可以理解，对于图30和图32-图35的方法实施例，本发明实施例还提供了对应的装置，如基站方法实施例对应的基站装置或终端设备方法实施例对应的终端设备装置，每种 装置包括用于执行上述对应方法步骤的模块，关于这些模块各自执行的功能在这里不做赘述，请参考之前的方法实施例。
此外，也可以由图9或图10对应的硬件装置执行图30和图32-图35的方法实施例，具体的硬件装置的执行过程不做赘述，可参见之前的实施例。
应理解，以上实施例涉及的指示MP可以是目标MP，目标MP可以是当前MP或当前MP之后的任一个MP。
应理解，在本发明实施例中，处理器可以是中央处理单元(Central Processing Unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在实现过程中，上述各方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外 的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称为“ROM”)、随机存取存储器(Random Access Memory，简称为“RAM”)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (68)

  1. 一种基于组播的无线通信方法，其特征在于，包括：
    终端设备接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
    所述终端设备根据所述指示信息获取变更后的当前MTCH的配置信息。
  2. 根据权利要求1所述的方法，其特征在于，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  3. 根据权利要求1或2所述的方法，其特征在于，所述指示信息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述下一MP或当前MP发生改变。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，在所述终端设备接收基站发送的DCI之前，所述方法还包括：
    所述终端设备在物理下行控制信道PDCCH监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
  5. 一种基于组播的无线通信方法，其特征在于，包括：
    基站生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在下一变更周期MP或当前MP发生改变；
    所述基站向终端设备发送所述DCI。
  6. 根据权利要求5所述的方法，其特征在于，MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  7. 根据权利要求5或6所述的方法，其特征在于，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述下一MP或当前MP发生改变。
  8. 一种基于组播的无线通信方法，其特征在于，包括：
    终端设备接收基站发送指示信息，所述指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，所述指示信息包含在 用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
    所述终端设备根据所述指示信息获取变更后的当前小区组播配置信息。
  9. 根据权利要求8所述的方法，其特征在于，所述当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其中，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  10. 根据权利要求8或9所述的方法，其特征在于，所述指示信息还用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
  11. 一种基于组播的无线通信方法，其特征在于，包括：
    基站生成指示信息，所述指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，所述指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
    所述基站向终端设备发送所述指示信息。
  12. 根据权利要求11所述的方法，其特征在于，所述当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其中，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  13. 根据权利要求11或12所述的方法，其特征在于，所述指示信息还用于指示当前小区中已有MTCH的配置信息发生改变，或当前小区中新增MTCH，或当前小区中删除已有MTCH。
  14. 一种基于组播的无线通信方法，其特征在于，包括：
    终端设备接收基站发送的小区组播配置信息，所述小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中所述集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
    所述终端设备根据所述小区组播配置信息获取小区中的MTCH。
  15. 根据权利要求14所述的方法，其特征在于，所述MTCH的PDCCH 搜索空间的配置信息包括下列至少一种：
    所述MTCH的下行物理控制信道候选PDCCH Candidate的最大重复传输次数Rmax、所述MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
  16. 根据权利要求14或15所述的方法，其特征在于，不同MTCH具有不同MTCH搜索空间。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，所述MTCH的配置信息还包括：所述MTCH的非连续接收DRX的配置信息和/或所述MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
  18. 根据权利要求14至17中任一项所述的方法，其特征在于，所述小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
  19. 一种基于组播的无线通信方法，其特征在于，包括：
    基站生成小区组播配置信息，所述小区组播配置信息包括小区内至少一个组播业务信道MTCH的配置信息的集合，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
    所述基站向终端设备发送所述小区组播配置信息。
  20. 根据权利要求19所述的方法，其特征在于，所述MTCH的搜索空间的配置信息包括下列至少一种：
    所述MTCH的下行物理控制信道候选个数PDCCH Candidate的最大重复传输次数Rmax、所述MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
  21. 根据权利要求19或20所述的方法，其特征在于，不同MTCH具有不同MTCH搜索空间。
  22. 根据权利要求19至21中任一项所述的方法，其特征在于，所述MTCH的配置信息还包括：所述MTCH的非连续接收DRX的配置信息和/或所述MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
  23. 根据权利要求19至22中任一项所述的方法，其特征在于，所述小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
  24. 一种基于组播的无线通信方法，其特征在于，包括：
    接收基站发送的下行控制信息DCI，所述DCI用于调度所述MTCH或 所述MCCH，所述DCI包括指示信息，所述指示信息用于指示所述终端设备在预设时频资源内是否存在寻呼；
    如果所述终端设备确定在所述预设时频资源内不存在寻呼，所述终端设备在所述预设时频资源内停止监听对应寻呼的搜索空间；
    如果所述终端设备确定在所述预设时频资源内存在寻呼，且所述终端设备在所述预设时频资源内存在至少一个寻呼机会PO时，所述终端设备在所述寻呼机会上监听对应于寻呼的搜索空间，停止接收所述MTCH或所述MCCH。
  25. 根据权利要求24所述的方法，其特征在于，所述预设时频资源为预设周期内用于发送寻呼的时频资源，
    或，所述终端设备接收MTCH或MCCH占用时间内用于发送寻呼的时频资源。
  26. 一种基于组播的无线通信方法，其特征在于，包括：
    基站生成下行控制信息DCI，所述DCI用于调度组播业务信道MTCH或组播控制信道MCCH，所述DCI包括指示信息，所述指示信息用于指示预设时频资源内是否存在寻呼；
    所述基站向所述终端设备发送所述DCI。
  27. 根据权利要求26所述的方法，其特征在于，所述预设时频资源为预设周期内用于发送寻呼的时频资源，
    或，所述基站发送MTCH或MCCH占用时间内用于发送寻呼的时频资源。
  28. 一种终端设备，其特征在于，包括：
    接收模块，接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在下一变更周期MP或当前MP发生改变；
    获取模块，用于根据所述指示信息获取变更后的当前MTCH的配置信息。
  29. 根据权利要求28所述的终端设备，其特征在于，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  30. 根据权利要求28或29所述的终端设备，其特征在于，所述指示信 息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述下一MP或当前MP发生改变。
  31. 根据权利要求28至30中任一项所述的终端设备，其特征在于，所述终端设备还包括：
    监听模块，用于在接收模块接收所述DCI之前，在在物理下行控制信道监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
  32. 一种基站，其特征在于，包括：
    处理模块，生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在下一变更周期MP或当前MP发生改变；
    发送模块，用于向终端设备发送所述DCI。
  33. 根据权利要求32所述的基站，其特征在于，MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  34. 根据权利要求32或33所述的基站，其特征在于，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述下一MP或当前MP发生改变。
  35. 一种终端设备，其特征在于，包括：
    接收模块，用于接收基站发送指示信息，所述指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，所述指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
    获取模块，用于根据所述指示信息获取所述当前小区组播配置信息。
  36. 根据权利要求35所述的终端设备，其特征在于，所述当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其中，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  37. 根据权利要求35或36所述的终端设备，其特征在于，所述指示信息还用于指示当前小区中已有MTCH的配置信息发生改变，或新增MTCH， 或删除已有MTCH。
  38. 一种基站，其特征在于，包括：
    处理模块，生成指示信息，所述指示信息用于指示当前小区组播配置信息在当前变更周期MP或下一MP内发生改变，所述指示信息包含在用于调度组播控制信道MCCH的下行控制信息DCI中，或包含在主信息块MIB中，或包含在用于在寻呼时机PO上指示系统消息变更的直接指示格式DIF中；
    发送模块，用于向终端设备发送所述指示信息。
  39. 根据权利要求38所述的基站，其特征在于，所述当前小区组播配置信息包括当前小区内至少一个组播业务信道MTCH的配置信息的集合，其中，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  40. 根据权利要求38或39所述的基站，其特征在于，所述指示信息还用于指示已有MTCH的配置信息发生改变，或新增MTCH，或删除已有MTCH。
  41. 一种终端设备，其特征在于，包括：
    接收模块，用于接收基站发送的小区组播配置信息，所述小区组播配置信息包括小区内至少一个MTCH的配置信息的集合，其中所述集合中的每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
    获取模块，用于根据所述小区组播配置信息获取小区中的MTCH。
  42. 根据权利要求41所述的终端设备，其特征在于，所述MTCH的搜索空间的配置信息包括下列至少一种：
    所述MTCH的下行物理控制信道候选PDCCH Candidate的最大重复传输次数Rmax、所述MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
  43. 根据权利要求41或42所述的终端设备，其特征在于，不同MTCH具有不同MTCH搜索空间。
  44. 根据权利要求41至43中任一项所述的终端设备，其特征在于，所述MTCH的配置信息还包括：所述MTCH的非连续接收DRX的配置信息和/或所述MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
  45. 根据权利要求41至44中任一项所述的终端设备，其特征在于，所 述小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
  46. 一种基于组播的无线通信的基站，其特征在于，包括：
    处理模块，用于生成小区组播配置信息，所述小区组播配置信息包括小区内至少一个组播业务信道MTCH的配置信息的集合，所述集合中每个MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI；
    发送模块，用于向终端设备发送所述小区组播配置信息。
  47. 根据权利要求46所述的基站，其特征在于，所述MTCH的搜索空间的配置信息包括下列至少一种：
    所述MTCH的下行物理控制信道候选PDCCH Candidate的最大重复传输次数Rmax、所述MTCH的搜索空间在时间上占用的比例、偏移配置信息αoffset。
  48. 根据权利要求46或47所述的基站，其特征在于，不同MTCH具有不同MTCH搜索空间。
  49. 根据权利要求46至48中任一项所述的基站，其特征在于，所述MTCH的配置信息还包括：所述MTCH的非连续接收DRX的配置信息和/或所述MTCH的会话Session ID对应的组播无线网络临时标识G-RNTI。
  50. 根据权利要求46至49中任一项所述的基站，其特征在于，所述小区组播配置信息承载于组播控制信道MCCH或系统信息块SIB中。
  51. 一种基于组播的无线通信的终端设备，其特征在于，包括：
    接收模块，接收基站发送的下行控制信息DCI，所述DCI用于调度所述MTCH或所述MCCH，所述DCI包括指示信息，所述指示信息用于指示所述终端设备预设时频资源内是否存在寻呼；
    处理模块，用于当所述终端设备确定在所述预设时频资源内不存在寻呼被调度时，所述终端设备在所述预设时频资源内停止监听对应寻呼的搜索空间；
    或当所述终端设备确定在所述预设时频资源内存在寻呼被调度时，且所述终端设备在所述预设时频资源内存在至少一个寻呼机会PO时，所述终端设备在所述寻呼机会上监听对应于寻呼的搜索空间，停止接收所述MTCH或所述MCCH。
  52. 根据权利要求51所述的终端设备，其特征在于，所述预设时频资源 为预设周期内用于发送寻呼的时频资源，
    或，所述终端接收MTCH或MCCH占用时间内用于发送寻呼的时频资源。
  53. 一种基于组播的无线通信的基站，其特征在于，包括：
    处理模块，用于生成下行控制信息DCI，所述DCI用于调度组播业务信道MTCH或组播控制信道MCCH，所述DCI包括指示信息，所述指示信息用于指示预设时频资源内是否存在寻呼；
    所述基站向所述终端设备发送所述DCI。
  54. 根据权利要求53所述的基站，其特征在于，所述预设时频资源为预设周期内用于发送寻呼的时频资源，
    或，所述基站发送MTCH或MCCH占用时间内用于发送寻呼的时频资源。
  55. 一种基于组播的无线通信方法，其特征在于，包括：
    终端设备接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在指示变更周期MP发生改变；
    所述终端设备根据所述指示信息获取变更后的当前MTCH的配置信息。
  56. 根据权利要求55所述的方法，其特征在于，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  57. 根据权利要求55或56所述的方法，其特征在于，所述指示信息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述指示MP发生改变。
  58. 根据权利要求55至57中任一项所述的方法，其特征在于，在所述终端设备接收基站发送的DCI之前，所述方法还包括：
    所述终端设备在物理下行控制信道PDCCH监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
  59. 一种基于组播的无线通信方法，其特征在于，包括：
    基站生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在指示变更周期MP发生改变；
    所述基站向终端设备发送所述DCI。
  60. 根据权利要求59所述的方法，其特征在于，MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  61. 根据权利要求59或60所述的方法，其特征在于，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述指示MP发生改变。
  62. 一种基于组播的无线通信的终端设备，其特征在于，包括：
    第一模块，用于接收基站发送的下行控制信息DCI，所述DCI用于调度当前组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述当前MTCH的配置信息在指示变更周期MP发生改变；
    第二模块，用于根据所述指示信息获取变更后的当前MTCH的配置信息。
  63. 根据权利要求62所述的终端设备，其特征在于，MTCH的配置信息包括物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  64. 根据权利要求62或63所述的终端设备，其特征在于，所述指示信息还用于指示所述基站的当前小区中其他MTCH的配置信息在所述指示MP发生改变。
  65. 根据权利要求62至64中任一项所述的终端设备，其特征在于，还包括第三模块，用于在接收基站发送的DCI之前，在物理下行控制信道PDCCH监听用于调度所述当前MTCH的DCI的搜索空间，而不监听调度MCCH的DCI的搜索空间。
  66. 一种基于组播的无线通信的基站，其特征在于，包括：
    第一模块，用于生成下行控制信息DCI，所述DCI用于调度第一组播业务信道MTCH，所述DCI包括指示信息，所述指示信息用于指示所述第一MTCH的配置信息在指示变更周期MP发生改变；
    第二模块，用于向终端设备发送所述DCI。
  67. 根据权利要求66所述的基站，其特征在于，所述MTCH的配置信息包括所述物理下行控制信道PDCCH搜索空间的配置信息，所述PDCCH搜索空间用于发送调度MTCH的DCI。
  68. 根据权利要求66或67所述的基站，其特征在于，所述指示信息还用于指示当前小区中第二MTCH的配置信息在所述指示MP发生改变。
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