WO2022077335A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2022077335A1
WO2022077335A1 PCT/CN2020/121145 CN2020121145W WO2022077335A1 WO 2022077335 A1 WO2022077335 A1 WO 2022077335A1 CN 2020121145 W CN2020121145 W CN 2020121145W WO 2022077335 A1 WO2022077335 A1 WO 2022077335A1
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Prior art keywords
data
control channel
downlink control
time domain
domain resource
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PCT/CN2020/121145
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English (en)
Chinese (zh)
Inventor
马蕊香
官磊
胡丹
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2020/121145 priority Critical patent/WO2022077335A1/fr
Publication of WO2022077335A1 publication Critical patent/WO2022077335A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present application relates to the field of mobile communication technologies, and in particular, to a communication method and device.
  • the communication process of downlink data is that the base station sends a physical downlink control channel (PDCCH), and the PDCCH contains scheduling information of downlink data, which is called downlink control information (DCI).
  • the UE receives downlink data from the base station according to the scheduling of the PDCCH. After receiving the downlink data, the UE needs a period of processing time before sending feedback information corresponding to the downlink data to the base station. During this period, in order to improve resource utilization and data transmission efficiency, the base station can also schedule other downlink data for the UE. Therefore, the UE needs to process the previously scheduled downlink data and the new downlink data at the same time. That is to say, the UE will have multiple parallel processing pipelines for processing multiple downlink data.
  • the UE has up to 16 pipelines to process the parallel transmission of up to 16 data.
  • These 16 processing lines are identified by 16 hybrid automatic repeat request (HARQ) processes, of which each HARQ process corresponds to one HARQ process identifier (HARQ process number, HPN).
  • HARQ process number HARQ process number, HPN.
  • the UE can support scheduling newly transmitted data or retransmitted data of multicast services through broadcast or multicast, and also supports scheduling of retransmitted data of multicast services through unicast.
  • the base station may, for the same UE, schedule the retransmission of transport block (TB) 1 for the UE by unicast mode, and schedule the initial transmission of TB2 for the UE by broadcast mode.
  • the same HPN is scheduled for the initial transmission and the retransmission. At this time, whether the UE should receive the retransmission data or the initial transmission data becomes a problem that needs to be solved.
  • Embodiments of the present application provide a communication method and device, which are used for reducing the error rate of data reception and improving the reliability of data, thereby ensuring the overall resource utilization rate of the system.
  • a first communication method which can be performed by a terminal device, or by a chip system capable of implementing the functions of the terminal device, or performed by a larger device including the terminal device.
  • the method includes: receiving a first downlink control channel and a second downlink control channel from a network device, where the first downlink control channel is used for scheduling retransmission data, and the second downlink control channel is used for scheduling initial transmission data ; According to the first time domain resource and the second time domain resource, receive the retransmission data, or receive the initial transmission data, wherein, the first time domain resource is the time corresponding to the first downlink control channel. domain resource, and the second time domain resource is the time domain resource corresponding to the second downlink control channel.
  • the terminal device can determine whether to receive the initial transmission data or the retransmission data according to the time domain resources corresponding to the first downlink control channel and the time domain resources corresponding to the second downlink control channel. It can receive the initial transmission data, and in some cases, it can receive the retransmission data. If the terminal device receives the retransmission data, the terminal device will not clear the buffer, and can obtain the correct data according to the retransmission data and the wrong data stored in the buffer. , which improves the accuracy of data reception, thereby improving the reliability of the data and ensuring the overall resource utilization of the system.
  • the first downlink control channel and the second downlink control channel include the same HARQ process number.
  • the first downlink control channel and the second downlink control channel include the same HARQ process number, so the retransmission data of the first data and the initial transmission data of the second data need to be processed by the same HARQ process, and one HARQ process at the same time If only one data can be processed, the terminal device will face the problem that two data needs to be processed by the same HARQ process at the same time, and obviously the terminal device can only choose to process one of the data.
  • the terminal device may determine whether to receive the retransmission data of the first data or the initial transmission data of the second data according to the first time domain resource and the second time domain resource, instead of directly clearing the cache corresponding to the HARQ process
  • the erroneous first data is transmitted during the transmission, thereby increasing the probability of obtaining the correct first data.
  • the first time domain resource is a time domain resource corresponding to the first downlink control channel
  • the second time domain resource is a time domain resource corresponding to the second downlink control channel domain resources, including: the first time domain resource is a time domain resource for receiving the first downlink control channel, and the second time domain resource is a time domain resource for receiving the second downlink control channel; or, The first time domain resource is the time domain resource of the retransmitted data, and the second time domain resource is the time domain resource of the initially transmitted data.
  • the time domain resource corresponding to the downlink control channel may be the time domain resource for receiving the downlink control channel, or may also be the time domain resource of the data scheduled by the downlink control channel, or may be other related to the downlink control channel. time domain resources.
  • receiving the retransmission data or receiving the initial transmission data according to the first time domain resource and the second time domain resource includes: if the first time domain resource If the domain resource is earlier than or equal to the second time domain resource, the retransmission data is received, and the initial transmission data is not received; or, if the second time domain resource is located after the first time domain resource Within the first time period, the initial transmission data is received, and the retransmission data is not received.
  • the base station can retransmit it, and the terminal device still has a chance to receive it.
  • the terminal device will clear the cache and delete the first received wrong data. If the data is lost, the terminal device loses the opportunity to obtain correct data, which increases the reception error rate of the terminal device. Therefore, the embodiments of the present application consider that the terminal device should try to give priority to receiving retransmitted data, so as to have more opportunities to obtain correct data.
  • the terminal device can choose to receive the retransmission data of the first data, so that the terminal device will not Empty the cache of the HARQ process corresponding to the first HPN, but can obtain correct first data according to the retransmission data of the first data and the wrong first data stored in the cache, so as to improve the success rate of data reception, thereby ensuring Reliability of data transmission.
  • the retransmission data is retransmission data of the first data
  • the initial transmission data is the initial transmission data of the second data
  • the retransmitted data is the retransmitted first data
  • the initially transmitted data is the initially transmitted second data.
  • the first data and the second data may be different data.
  • the first downlink control channel is used for scheduling the retransmission data in a unicast manner
  • the second downlink control channel is used for scheduling in a multicast, broadcast or multicast manner the initial transmission data
  • the network device has previously scheduled the initial transmission of the first data for a group of terminal devices through multicast, multicast or broadcast, but for the terminal device, the reception of the initial transmission of the first data fails, so the network The device can schedule the retransmission data of the first data for the terminal device, and for this group of terminal devices, the network device can continue to schedule the initial transmission data of the second data through multicast, broadcast or multicast.
  • the first control channel is scrambled by C-RNTI
  • the second control channel is scrambled by G-RNTI
  • the first control channel is scheduled in a unicast manner, it can be scrambled by the C-RNTI.
  • the second control channel is scheduled by multicast, broadcast or multicast, so it can be scrambled by G-RNTI, so that a group of terminal devices can share one G-RNTI.
  • the time domain resource for receiving the second downlink control channel is located before the time domain resource for sending the feedback information of the retransmitted data.
  • the first downlink control channel and the second downlink control channel include the same HARQ process number, so the retransmission data of the first data and the initial transmission data of the second data need to be processed by the same HARQ process, and one HARQ process at the same time Only one data can be processed. Then, if the time domain resource for the terminal device to receive the second downlink control channel is located before the time domain resource for sending the feedback information of the retransmitted data, the terminal device will face the need to pass the same HARQ at the same time.
  • the problem is that the process handles two pieces of data, and the end device obviously can only choose to handle one of them.
  • the terminal device may determine whether to receive the retransmission data of the first data or the initial transmission data of the second data according to the first time domain resource and the second time domain resource, instead of directly clearing the cache corresponding to the HARQ process
  • the erroneous first data is transmitted during the transmission, thereby increasing the probability of obtaining the correct first data.
  • a second communication method is provided, and the method can be executed by a network device, or executed by a chip system, and the chip system can realize the function of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: sending a first downlink control channel and a second downlink control channel, the first downlink control channel is used for scheduling retransmission data, the second downlink control channel is used for scheduling initial transmission data, and the first A time domain resource is earlier than or equal to a second time domain resource, the first time domain resource is the time domain resource corresponding to the first downlink control channel, and the second time domain resource is the second downlink control channel
  • the time domain resource corresponding to the channel, the first downlink control channel and the second downlink control channel include the same HARQ process number; the retransmission data and the initial transmission data are sent.
  • the first time domain resource is a time domain resource for sending the first downlink control channel
  • the second time domain resource is a time domain resource for sending the second downlink control channel or
  • the first time domain resource is the time domain resource of the retransmitted data
  • the second time domain resource is the time domain resource of the initially transmitted data.
  • the retransmission data is retransmission data of the first data
  • the initial transmission data is the initial transmission data of the second data
  • the first downlink control channel is used for scheduling the retransmission data in a unicast manner
  • the second downlink control channel is used for scheduling in a multicast, broadcast or multicast manner the initial transmission data
  • the first control channel is scrambled by C-RNTI
  • the second control channel is scrambled by G-RNTI
  • a third communication method is provided, and the method can be executed by a network device, or executed by a chip system, and the chip system can realize the function of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: sending a first downlink control channel, where the first downlink control channel is used for scheduling retransmission data; within a first time period after sending the first downlink control channel, not sending the second downlink control channel, The second downlink control channel is used for scheduling initial transmission data; sending the retransmission data.
  • the network device may not send the second downlink control channel within the first time period after sending the first downlink control channel, so the network device does not need to send the initial transmission data scheduled by the second downlink control channel, Then the terminal device only needs to process the retransmitted data of the first data. For example, the terminal device can obtain correct first data according to the retransmitted data of the first data and the erroneous first data stored in the cache, thereby increasing the probability of the terminal device obtaining correct data.
  • the retransmission data is retransmission data of the first data
  • the initial transmission data is the initial transmission data of the second data
  • the first downlink control channel is used for scheduling the retransmission data in a unicast manner
  • the second downlink control channel is used for scheduling the retransmission data in a multicast or multicast manner Initial data transfer.
  • the first control channel is scrambled by C-RNTI
  • the second control channel is scrambled by G-RNTI
  • a fourth communication method which can be performed by a terminal device, or by a system-on-chip, which can implement the functions of the terminal device, or be performed by a larger device including the terminal device.
  • the method includes: receiving a first downlink control channel and a second downlink control channel from a network device, the first downlink control channel includes a first sequence number, the first sequence number indicates a first HPN, the first downlink control channel
  • the second downlink control channel includes a second HPN; the first data scheduled by the first downlink control channel is processed through the HARQ process corresponding to the first HPN, and the second HARQ corresponding to the second HPN is used
  • the process processes the second data scheduled by the second downlink control channel, the first data is initial transmission data, and the second data is retransmission data.
  • the network device can schedule retransmission in a unicast manner, saving scheduling resources, and does not affect the normal operation of the UE without errors. Moreover, even if there is an error in the initial transmission through broadcast or multicast scheduling, when the HARQ process is insufficient, the network device can continue to use the HARQ process corresponding to the last broadcast or multicast scheduling to continue scheduling the initial transmission, so that HPN resources can be reasonably utilized. Improve the overall efficiency of the system.
  • the second data is retransmission data of third data
  • the third data is data that fails to be processed by the second HARQ process.
  • the method further includes: receiving first configuration information from the network device, where the first configuration information is used to configure one or more HPNs, the one or more HPNs One of the HPNs corresponds to a serial number, and the first HPN belongs to the one or more HPNs.
  • the network device may send the first configuration information to the terminal device, and accordingly, the terminal device receives the first configuration information from the network device,
  • the first configuration information can configure the corresponding relationship between the HPN and the serial number for the terminal device.
  • the first configuration information is carried, for example, in higher layer signaling.
  • the first configuration information may configure one or more HPNs, and in the first configuration information, one HPN of the one or more HPNs corresponds to a serial number, for example, one HPN corresponds to a serial number. In this way, when the network equipment schedules the terminal equipment through multicast, broadcast or multicast, it can schedule the terminal equipment through the serial number.
  • the network equipment can schedule different HPNs for different terminal equipment through multicast, broadcast or multicast, so that through one scheduling of the network equipment, the terminal equipment can process the scheduled data through different HARQ processes.
  • the HARQ process for processing retransmission data and the HARQ process for processing initial transmission data may be different, so that terminal equipment processes retransmission data and initial transmission data through different HARQ processes respectively, and different HARQ processes do not interfere with each other. , so that the terminal device can complete the processing of both the retransmitted data and the initially transmitted data, which reduces the conflict between the HARQ processes and also reduces the data processing delay.
  • the ith HPN in the one or more HPNs corresponds to the ith serial number, or the ith HPN in the one or more HPNs corresponds to the ith HPN -1 serial number.
  • the sequence of the HPNs and the sequence of the serial numbers may be consistent.
  • the corresponding serial numbers may also be in ascending order.
  • the serial number corresponding to HPN1 is 0, the serial number corresponding to HPN2 is 1, the serial number corresponding to HPN3 is 2, and so on.
  • the serial number corresponding to HPN1 is 1, the serial number corresponding to HPN2 is 2, the serial number corresponding to HPN3 is 3, and so on. This correspondence is more in line with the general numbering rules.
  • the first downlink control channel is used for scheduling the first data in a multicast or multicast manner
  • the second downlink control channel is used for scheduling the first data in a unicast manner Second data.
  • the first control channel is scrambled by G-RNTI
  • the second control channel is scrambled by C-RNTI
  • the time domain resource for receiving the first downlink control channel is located before the time domain resource for sending the feedback information of the second data.
  • a fifth communication method is provided, and the method can be executed by a network device, or executed by a chip system, and the chip system can realize the function of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: sending a first downlink control channel, and sending a second downlink control channel to a first terminal device, where the first downlink control channel includes a first sequence number, and the first sequence number is the first sequence number.
  • a terminal device indicates the first HPN, and the second downlink control channel includes a second HPN; sends the first data scheduled by the first downlink control channel, and sends the second downlink control channel to the first terminal device
  • the second data scheduled by the downlink control channel, the first data is initial transmission data, and the second data is retransmission data.
  • the second data is retransmission data of third data
  • the third data is data that the first terminal device fails to receive.
  • the method further includes: sending first configuration information to the first terminal device, where the first configuration information is used to configure K HPNs, one of the K HPNs An HPN corresponds to a serial number, the first HPN belongs to the K HPNs, and K is a positive integer.
  • the ith HPN among the K HPNs corresponds to the ith sequence number, or the ith HPN among the K HPNs corresponds to the ith-1th sequence No.
  • the first downlink control channel is used for scheduling the first data in a multicast or multicast manner
  • the second downlink control channel is used for scheduling the first data in a unicast manner Second data.
  • the first control channel is scrambled by G-RNTI
  • the second control channel is scrambled by C-RNTI
  • the first serial number indicates a third HPN for the second terminal device.
  • the same serial number may indicate the same HPN or different HPNs for different terminal devices.
  • the method further includes: sending second configuration information to the second terminal device, where the second configuration information is used to configure M HPNs, one of the M HPNs The HPN corresponds to a serial number, the third HPN belongs to the M HPNs, and M is a positive integer.
  • the network device may configure the corresponding relationship between the HPN and the serial number for a plurality of terminal devices respectively, and the corresponding relationship configured for different terminal devices may include the same or different number of items.
  • the corresponding relationships configured for different terminal equipment may include the same sequence number, for example, sequence number 0 or sequence number 1, and the same sequence number may correspond to the same HPN in the corresponding relationship of different UEs, or May correspond to different HPNs.
  • a communication device may be the terminal device described in any one of the first to fifth aspects above, or an electronic device (eg, a chip system) configured in the terminal device, or an electronic device including the terminal device. larger equipment.
  • the terminal device includes corresponding means or modules for performing the above method.
  • the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiving unit (sometimes also referred to as a transceiving module).
  • the processing unit is configured to receive, through the transceiver unit, a first downlink control channel and a second downlink control channel from a network device, the first downlink control channel is used for scheduling retransmission data, and the first downlink control channel is used for scheduling retransmission data. Two downlink control channels are used to schedule initial transmission data.
  • the processing unit is further configured to receive the retransmission data or receive the initial transmission data according to the first time domain resource and the second time domain resource through the transceiver unit, wherein the first time domain resource is the time domain resource corresponding to the first downlink control channel, and the second time domain resource is the time domain resource corresponding to the second downlink control channel.
  • the processing unit is configured to receive, through the transceiver unit, a first downlink control channel and a second downlink control channel from a network device, where the first downlink control channel includes a first sequence number, the first downlink control channel The sequence number indicates the first HARQ process identification HPN, and the second downlink control channel includes the second HPN.
  • the processing unit is further configured to process the first data scheduled by the first downlink control channel through the HARQ process corresponding to the first HPN, and use the second HARQ process corresponding to the second HPN
  • the second data scheduled by the second downlink control channel is processed, the first data is initial transmission data, and the second data is retransmission data.
  • the communication apparatus includes: a processor, coupled to the memory, for executing instructions in the memory, so as to implement the method executed by the terminal device in any one of the first to fifth aspects above.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a communication device is provided.
  • the communication apparatus may be the network device described in any one of the above-mentioned first to fifth aspects.
  • the communication device has the function of the above-mentioned network device.
  • the network equipment is, for example, a base station, or a baseband device in a base station.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the processing unit is configured to send a first downlink control channel and a second downlink control channel through the transceiver unit, the first downlink control channel is used for scheduling retransmission data, and the second downlink control channel It is used to schedule initial transmission data, and the first time domain resource is earlier than or equal to the second time domain resource, the first time domain resource is the time domain resource corresponding to the first downlink control channel, and the second time domain resource is the time domain resource corresponding to the first downlink control channel.
  • the time domain resource is the time domain resource corresponding to the second downlink control channel, and the first downlink control channel and the second downlink control channel include the same HARQ process number.
  • the processing unit is further configured to send the retransmission data and the initial transmission data through the transceiver unit.
  • the processing unit is configured to send a first downlink control channel through the transceiver unit, where the first downlink control channel is used for scheduling retransmission data.
  • the processing unit is further configured to not send the second downlink control channel through the transceiver unit within a first time period after sending the first downlink control channel, and the second downlink control channel is used for scheduling initial transmission data.
  • the processing unit is further configured to send the retransmitted data through the transceiver unit.
  • the processing unit is configured to send the first downlink control channel through the transceiver unit, and send the second downlink control channel to the first terminal device, where the first downlink control channel includes the first sequence number, The first sequence number indicates the first HPN for the first terminal device, and the second downlink control channel includes the second HPN.
  • the processing unit is further configured to send the first data scheduled by the first downlink control channel through the transceiver unit, and send the first data scheduled by the second downlink control channel to the first terminal device. Two data, the first data is initial transmission data, and the second data is retransmission data.
  • the communication device includes a storage unit and a processing unit, and the processing unit is configured to couple with the storage unit and execute programs or instructions in the storage unit to enable the communication device to perform the above The functionality of the network device.
  • a computer-readable storage medium is provided, and the computer-readable storage medium is used to store a computer program or instruction, which, when executed, enables the method performed by the terminal device or the network device in the above aspects to be implemented .
  • a computer program product comprising instructions which, when run on a computer, cause the methods of the above aspects to be implemented.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the application.
  • FIG. 2A is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2B is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 2C is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a network device according to an embodiment of the present application.
  • the technologies provided in the embodiments of the present application can be applied to the communication system 10 shown in FIG. 1 .
  • the communication system 10 includes one or more communication apparatuses 30 (for example, terminal devices) connected to a or multiple core network devices to implement communication between multiple communication devices.
  • the communication system may, for example, support 2G, 3G, 4G, or 5G (sometimes also referred to as new radio, NR) access technology communication systems, wireless fidelity (WiFi) systems, 3rd Generation Partnership Project ( 3rd generation partnership project, 3GPP) related cellular systems, communication systems that support the fusion of multiple wireless technologies, or future-oriented evolution systems.
  • 2G, 3G, 4G, or 5G sometimes also referred to as new radio, NR
  • WiFi wireless fidelity
  • 3rd Generation Partnership Project 3rd generation partnership project, 3GPP
  • 3GPP 3rd generation partnership project
  • a terminal device is a device with a wireless transceiver function, which may be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a built-in wireless device in the above-mentioned device). , communication modules, modems, or systems on a chip, etc.).
  • the terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: cellular communication, device-to-device communication (device-to-device, D2D), vehicle-to-everything (vehicle to everything, V2X), machine-to-machine/machine-type communications (M2M/MTC), Internet of things (internet of things, IoT), virtual reality (virtual reality, VR) , Augmented reality (AR), industrial control (industrial control), unmanned driving (self driving), telemedicine (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation , terminal equipment for smart city, drone, robot and other scenarios.
  • cellular communication device-to-device communication
  • vehicle-to-everything vehicle to everything, V2X
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • virtual reality virtual reality
  • AR Augmented reality
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the network devices in the embodiments of the present application include, for example, access network devices and/or core network devices.
  • the access network device is a device with a wireless transceiver function, and is used to communicate with the terminal device.
  • the access network equipment includes but is not limited to the base station (BTS, Node B, eNodeB/eNB, or gNodeB/gNB), the transmission reception point (TRP) in the above-mentioned communication system, the base station of the subsequent evolution of 3GPP, and the WiFi system. access nodes, wireless relay nodes, wireless backhaul nodes, etc.
  • the base station may be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, and the like.
  • Multiple base stations may support the aforementioned networks of the same access technology, or may support the aforementioned networks of different access technologies.
  • a base station may contain one or more co-sited or non-co-sited transmission reception points.
  • the network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device.
  • a network device in the V2X technology may be a road side unit (RSU).
  • RSU road side unit
  • the multiple network devices in the communication system may be base stations of the same type, or may be base stations of different types.
  • the base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station.
  • a terminal device can communicate with multiple base stations in different access technologies.
  • the core network equipment is used to implement functions such as mobility management, data processing, session management, policy and charging.
  • the names of devices implementing core network functions in systems with different access technologies may be different, which are not limited in this application.
  • the core network equipment includes: an access and mobility management function (AMF), a session management function (SMF), or a user plane function (UPF) Wait.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • the communication device for implementing the function of the network device may be a network device, or may be a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • the number of nouns means “singular nouns or plural nouns", that is, “one or more”. "At least one” means one or more, and “plurality” means two or more. "And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/" generally indicates that the associated objects are an "or” relationship. For example, A/B, means: A or B.
  • At least one item(s) below or similar expressions refer to any combination of these items, including any combination of single item(s) or plural item(s).
  • at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c Can be single or multiple.
  • first and second are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority, or importance of multiple objects.
  • first downlink control channel and the second downlink control channel may be the same downlink control channel or different downlink control channels, and this name does not indicate the time-frequency of the two downlink control channels. Domain location, content carried, priority or importance, etc.
  • the International Telecommunication Union defines three types of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication communications, URLLC) and massive machine type communications (mMTC).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low-latency communication communications
  • mMTC massive machine type communications
  • eMBB services include ultra-high-definition video, augmented reality (AR), virtual reality (VR), etc.
  • AR augmented reality
  • VR virtual reality
  • the main features of these services are large amount of data transmission and high transmission rate.
  • Typical URLLC businesses include: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and tactile interaction applications such as remote repair and remote surgery.
  • the main features of these services are ultra-reliable requirements. high reliability, low latency, small amount of transmitted data, and burstiness.
  • Typical mMTC services include: smart grid power distribution automation, smart city, etc.
  • the main features are the huge number of networked devices, the small amount of data transmitted, and the insensitivity of data to transmission delay.
  • These mMTC terminals need to meet low cost and very long standby time. time requirements.
  • unicast scheduling is supported, that is, the base station sends a single control channel for a single scheduled UE to schedule the data service of the single UE. Then, for different UEs, the base station sends control channels respectively, and schedules data services of different UEs respectively.
  • IPTV interactive Internet TV
  • mobile TV can provide high robustness and important communication services; another example is group communication in disaster situations. , public safety networks, etc., put forward higher requirements for broadcast/multicast services.
  • IPTV interactive Internet TV
  • These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.
  • the 3rd generation partnership project (3GPP) proposes the multimedia broadcast multicast service (MBMS), which supports the provision of multicast/broadcast networks in cellular systems.
  • the technology of transmitting data by multiple target mobile terminals realizes the resource sharing between the core network and the access network, and improves the utilization rate of network resources (especially air interface resources).
  • the MBMS service defined by 3GPP can not only realize the multicast and broadcast of messages with low rate of plain text, but also realize the broadcast and multicast of high-speed multimedia services, and provide a variety of rich video, audio and multimedia services.
  • the characteristics of the broadcast service enable better efficiency when transmitting information of interest to the public, which undoubtedly conforms to the future trend of mobile data development and provides better business prospects for the development of communication technology.
  • broadcast/multicast scheduling is supported, that is, the base station transmits a control channel uniformly for multiple scheduled UEs to schedule the data services of the multiple UEs.
  • the communication process of downlink data is that the base station sends a PDCCH, the PDCCH contains the scheduling information of the physical downlink shared channel (PDSCH), and the scheduling information of the PDSCH includes, for example, information such as the time-frequency resources of the PDSCH, and the PDSCH carries the base station Downlink data sent to the UE.
  • the UE receives downlink data from the base station according to the scheduling of the PDCCH. After receiving the downlink data, the UE needs a period of processing time before sending feedback information corresponding to the downlink data to the base station. During this period, in order to improve resource utilization and data transmission efficiency, the base station can also schedule other downlink data for the UE.
  • PDSCH physical downlink shared channel
  • the UE needs to process the previously scheduled downlink data and the new downlink data at the same time. That is to say, the UE will have multiple parallel processing pipelines for processing multiple downlink data.
  • the UE has up to 16 pipelines to process up to 16 parallel transmissions of data, and the 16 processing lines are identified by 16 HARQ processes, where each HARQ process corresponds to one HPN.
  • the base station can schedule the UE to process downlink data on the corresponding HARQ process.
  • the PDCCH sent by the base station to the UE includes downlink control information (downlink control information, DCI), and the DCI includes an indication field, which may indicate the HPN.
  • the indication field includes one or more bits, and the value of the one or more bits represents the value of the HPN.
  • the indication field includes 2 bits, if the 2 bits are "00", it indicates HPN0, and if the 2 bits are "01", it indicates HPN1.
  • the UE can determine which HARQ process needs to be used to process the data scheduled by the DCI. Therefore, the base station can schedule the UE to process different data through HARQ processes corresponding to different HPNs without affecting each other, thereby improving the parallel processing capability of the UE.
  • the DCI also includes a new data indicator (NDI), and the NDI can indicate whether the data scheduled by the PDCCH is initial transmission data (or referred to as new transmission data) or retransmission data.
  • NDI new data indicator
  • the base station sends PDCCH1 to the UE, PDCCH1 includes DCI1, the indication field included in DCI1 indicates HPN1, and the NDI included in DCI1 is 0, which means that the base station uses HPN1 to schedule initial transmission data, such as the initial transmission data of data 1 .
  • the UE processes the initial transmission data of data 1, then buffers the initial transmission data of data 1, and sends feedback information of the initial transmission data of data 1 to the base station.
  • the base station sends PDCCH2 to the UE again, the PDCCH2 includes DCI2, the indication field included in DCI2 indicates HPN1, and the NDI included in DCI2 is 0.
  • the NDI is not reversed relative to the last time, indicating that the base station uses HPN1 to schedule retransmission data , that is, the retransmission data of data 1. Then, after receiving the scheduled data according to PDCCH2, the UE combines the retransmission data of data 1 received this time with the initial transmission data of data 1 stored in the previous cache, performs joint decoding, and then sends the feedback information of data 1 to the base station. .
  • the base station sends the initial data of data 1 to the UE
  • the PDCCH2 includes DCI2
  • the indication field included in DCI2 indicates HPN1
  • the NDI included in DCI2 is 1. If it is flipped, it means that the base station uses HPN1 to schedule the initial transmission data, and it is the initial transmission data of data 2.
  • the UE can receive the initial transmission data of the data 2, and clear the cache corresponding to the HPN1, and the UE can send the initial transmission data feedback information of the data 2 to the base station.
  • the PDCCH sent by the base station to the UE can be scrambled by the cell-radio network temporary identifier (C-RNTI), and each UE corresponds to a C-RNTI, The C-RNTIs of different UEs are different.
  • the UE detects the PDCCH by means of blind detection, and after detecting a PDCCH, the UE can use the C-RNTI corresponding to the UE to descramble the PDCCH.
  • the PDCCH is the PDCCH sent to the UE, and the UE can receive data according to the procedure described above according to the scheduling of the PDCCH.
  • the PDCCH sent by the base station to the UE can be scrambled by a group-radio network temporary identifier (G-RNTI), and a G-RNTI can be shared by a group of UEs. - RNTI can be different.
  • G-RNTI group-radio network temporary identifier
  • the PDCCH is detected by means of blind detection, and after detecting a PDCCH, the UE can use the G-RNTI corresponding to the group to which the UE belongs to descramble the PDCCH.
  • the PDCCH is the PDCCH sent to the group to which the UE belongs, or the PDCCH is the PDCCH sent to the UE.
  • data is received according to the process described above.
  • the base station schedules the initial transmission of data to a group of UEs in a broadcast manner, some of the UEs may fail to receive the data, so the base station needs to reschedule the retransmitted data. If the number of UEs that fail to receive is small, when scheduling retransmission data, unicast is used to schedule retransmission data to these UEs that fail to receive, which can reduce the used scheduling resources and make the scheduling method more reasonable.
  • the base station schedules the initial transmission data of data 1 for UE1 to UE4 by broadcasting, and the scheduled HPN is HPN1. Assuming that only UE1 has a reception error, at this time, the base station can schedule retransmission data of data 1 for UE1 in a unicast manner. In addition, since UE1 receives data 1 incorrectly, the processing line corresponding to HPN1 of UE1 will buffer wrong data 1. After that, for example, the base station needs to schedule the initial transmission data of data 2 for UE1 to UE4 by broadcasting.
  • the base station cannot coordinate a suitable HARQ process, because UE1 occupies HPN1 for retransmission, so that other UEs cannot use HPN1 to receive data 2, which is not optimal from a system perspective. It is difficult for the base station to coordinate another unoccupied HPN for this group of UEs, so the base station can only use HPN1 again to schedule the initial transmission of data 2 for UE1 to UE4. Then, for UE1, it may receive the scheduling information of the initial transmission data of data 2 and the scheduling information of the retransmitted data of data 1, and the two scheduling information indicate the initial transmission data of data 2 and the retransmission data of data 1. All were treated with HPN1.
  • UE1 will receive the initial transmission data of data 2, so UE1 will clear the cache in the processing line corresponding to HPN1, that is, delete the wrong data 1, that is, the initial transmission data of data 1. As a result, UE1 can no longer obtain correct data 1, so that the reception error rate of the UE is high.
  • HPN1 corresponds to HARQ process 1
  • HPN2 corresponds to HARQ process 2
  • HPN1 corresponds to HARQ process 3
  • HPN2 corresponds to HARQ process 4, etc.
  • which HARQ process an HPN corresponds to depends on the hardware or software settings of the terminal device, which is not limited in this embodiment of the present application.
  • the terminal device can determine whether to receive the initial transmission data or the retransmission data according to the time domain resources corresponding to the first downlink control channel and the time domain resources corresponding to the second downlink control channel. It can receive the initial transmission data, and in some cases, it can receive the retransmission data.
  • the terminal device If the terminal device receives the retransmission data, the terminal device will not clear the buffer, but can obtain the data according to the retransmission data and the error data stored in the buffer. Correct data improves the correct rate of data reception, ensures the reliability of data, avoids large-scale retransmission, and improves the overall resource utilization of the system.
  • FIG. 2A shows a communication network architecture in the communication system 10 provided by the embodiment of the present application, and the embodiments shown in FIG. 3 , FIG. 4 , or FIG. 5 provided later can all be applicable to this architecture.
  • the network device included in FIG. 2A is, for example, the access network device 20 included in the communication system 10
  • the terminal device included in FIG. 2A is, for example, the communication device 30 included in the communication system 10 .
  • the network device and the terminal device can communicate.
  • FIG. 2B shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the communication system includes a core network (new core, CN) and a radio access network (radio access network, RAN).
  • the network device (eg, base station) in the RAN is, for example, the access network device 20 in the communication system 10 .
  • the network equipment in the RAN includes baseband devices and radio frequency devices.
  • the baseband device may be implemented by one or more nodes, and the radio frequency device may be implemented independently from the baseband device, or may be integrated into the baseband device, or partially remote and partially integrated in the baseband device.
  • the network equipment in the RAN may include CUs and DUs, and if there are multiple DUs, the multiple DUs may be centrally controlled by one CU.
  • CU and DU can be divided according to the protocol layer functions of the wireless network they possess.
  • the functions of the packet data convergence protocol (PDCP) layer and the above protocol layers are set at the protocol layers below the CU and PDCP, such as the wireless link.
  • the functions of the channel control (radio link control, RLC) layer and the media access control (media access control, MAC) layer are set in the DU.
  • RLC radio link control
  • MAC media access control
  • the radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited in this embodiment of the present application.
  • FIG. 2C shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the control plane (CP) and user plane (UP) of the CU can also be separated and divided into different entities for implementation, namely the control plane CU entity (CU-CP entity). ) and the user plane CU entity (CU-UP entity).
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may directly encapsulate the signaling at the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling.
  • the CU is divided into a network device on the RAN side, and in addition, the CU can also be divided into a network device on the CN side, which is not limited in this application.
  • the downlink control channel is the PDCCH as an example.
  • the first downlink control channel may be the first PDCCH
  • the second downlink control channel may be the second PDCCH
  • the third downlink control channel may be the third PDCCH.
  • the network device sends the third PDCCH, and correspondingly, the UE receives the third PDCCH from the network device.
  • the network device sends the DCI through the third PDCCH, that is, the DCI is carried in the PDCCH, and accordingly, the UE receives the DCI through the third PDCCH, that is, receives the DCI carried by the third PDCCH.
  • This DCI may be referred to as a third DCI.
  • the DCI scheduling downlink data may also be understood as scheduling the downlink data on the PDCCH carrying the DCI. That is, the downlink control channel is equivalent to the DCI carried in the downlink control channel.
  • the third DCI may be used to schedule the first data.
  • the third DCI includes an indication field, and the indication field indicates the first HPN, and it can be understood that the third DCI includes the first HPN.
  • the first HPN is the process ID of the HARQ process corresponding to the first HPN.
  • the third DCI includes the first HPN, indicating that the third DCI instructs the UE to process the first data through the HARQ process corresponding to the first HPN.
  • the third DCI may also include NDI.
  • the NDI included in the third DCI is reversed relative to the NDI included in the DCI indicating the same HPN sent by the network device last time, indicating that the third DCI schedules the first data.
  • the third DCI includes scheduling information of initially transmitted data of the first data, where the scheduling information includes, for example, time-domain resources and/or frequency-domain locations of the initially transmitted data of the first data.
  • the network device can schedule the first data to a single UE through unicast, in this case, the third DCI can be scrambled by C-RNTI; alternatively, the network device can also schedule to a group of UEs through broadcast or multicast
  • the first data, in this case the third DCI may be scrambled with G-RNTI.
  • the embodiment of the present application takes the network device scheduling the first data to a group of UEs by broadcasting or multicasting as an example. This group of UEs includes multiple UEs, so it is possible that these multiple UEs can receive the third PDCCH, then S32 is: Take UE1 in this group of UEs as an example.
  • the network device sends the initial transmission data of the first data, and correspondingly, the UE receives the initial transmission data of the first data from the network device.
  • the network device sends the initial transmission data of the first data, and the UE may detect and receive the initial transmission data of the first data according to the scheduling information included in the third DCI. If the third PDCCH is scheduled in a broadcast manner or a multicast manner, there may be multiple UEs that can receive the initially transmitted data of the first data. Similarly, UE1 is taken as an example in S32.
  • the UE1 After receiving the initial transmission data of the first data, the UE1 sends feedback information to the network device, the feedback information is, for example, an acknowledgement (ACK) or a negative acknowledgement (NACK), to indicate whether the initial transmission data of the first data is successfully received. For example, if UE1 sends a NACK to the network device, after receiving the NACK, the network device determines that UE1 fails to receive the initial transmission of the first data, and the network device can retransmit the first data to UE1 to improve UE1's success in receiving the first data. Rate. In this case, S33 can be executed. If all of a group of UEs successfully receive the initial transmission of the first data, S33 does not need to be performed. For example, the network device may continue to schedule new data to this group of UEs through broadcast or multicast, or the network device may stop scheduling.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • the network device sends the first PDCCH to the UE1, and correspondingly, the UE1 receives the first PDCCH from the network device.
  • the network device sends the DCI to the UE1 through the first PDCCH, and correspondingly, the UE1 receives the DCI through the first PDCCH.
  • This DCI may be referred to as the first DCI.
  • the first DCI may be used to schedule retransmission data of the first data, and the first DCI includes an indication field, where the indication field indicates the first HPN, and it can be understood that the first DCI includes the first HPN.
  • the NDI included in the first DCI is not reversed relative to the NDI included in the third DCI sent by the network device last time, indicating that the first DCI schedules retransmission data of the first data.
  • the first DCI includes scheduling information of retransmission data of the first data, and the scheduling information includes, for example, time-domain resources and/or frequency-domain locations of the retransmission data of the first data.
  • the network device needs to schedule retransmission data, it can use unicast scheduling to save scheduling resources.
  • the first PDCCH may be sent in a unicast manner, for example, the first DCI is scrambled by C-RNTI.
  • the cache of the HARQ process corresponding to the first HPN of UE1 may store the wrong first data. Therefore, the first DCI instructs the UE to continue processing the first data scheduled by the first DCI through the HARQ process corresponding to the first HPN, so that the UE1 can obtain the correct first data according to the retransmitted data of the first data and the wrong first data.
  • the network device sends the retransmission data of the first data to the UE1.
  • the network device sends the retransmission data of the first data to the UE in a unicast manner. If UE1 wants to receive the retransmission data of the first data, it can detect and receive the retransmission data of the first data according to the scheduling information included in the first DCI. .
  • the network device sends the second PDCCH, and correspondingly, the UE receives the second PDCCH from the network device.
  • the network device sends the DCI through the second PDCCH, and correspondingly, the UE receives the DCI through the second PDCCH.
  • This DCI may be referred to as the second DCI.
  • the second DCI may be used to schedule the second data, and the second DCI includes an indication field, and the indication field indicates the first HPN, and it can be understood that the second DCI includes the first HPN.
  • the first HPN is the process ID of the HARQ process corresponding to the first HPN.
  • the second DCI includes the first HPN, indicating that the second DCI instructs the UE to process the second data through the HARQ process corresponding to the first HPN. It can be seen that the first DCI and the second DCI include the same HPN, that is, for UE1, the initial transmission data of the second data and the retransmission data of the first data need to be processed through the same HARQ process. Wherein, the first data and the second data are different data.
  • the second DCI may also include NDI.
  • the NDI included in the second DCI is reversed relative to the NDI included in the DCI indicating the same HPN sent by the network device last time, indicating that the second DCI schedules the second data. initial data.
  • the second DCI includes scheduling information of initially transmitted data of the second data, where the scheduling information includes, for example, time-domain resources and/or frequency-domain locations of the initially transmitted data of the second data.
  • the network device may schedule the initial transmission of the second data to a single UE through unicast.
  • the second DCI may be scrambled by C-RNTI; or the network device may broadcast or multicast to a single UE.
  • the group UE schedules the initial transmission data of the second data.
  • the second DCI may be scrambled by using the G-RNTI.
  • the network device schedules the initially transmitted data of the second data by broadcasting or multicasting as an example. After the network device schedules the initial transmission of the first data in S31 and S32, although the UE1 fails to receive the initial transmission of the first data, other UEs in this group of UEs except UE1 are the initial transmission of the first data.
  • the reception may be successful, so the network device can continue to schedule new data for this group of UEs. Therefore, in addition to scheduling the retransmission data of the first data to UE1 through S33 and S34, the network device may also schedule initial transmission data of the second data for this group of UEs through S35 and S36. And this group of UEs includes UE1, so UE1 can also receive the second PDCCH, or can also receive the second DCI. In this case, it may be necessary for UE1 to receive the initial transmission schedule and the retransmission schedule.
  • the network device sends the initial transmission data of the second data.
  • the network device sends the initial transmission data of the second data through broadcast or multicast. If a UE wants to receive the initial transmission data of the second data, it can detect and receive the initial transmission data of the second data according to the scheduling information included in the second DCI. . In addition, since the second PDCCH is scheduled in a broadcast manner or a multicast manner, there may be multiple UEs that can receive the initial transmission data of the second data, and UE1 is used as an example in S36.
  • UE1 receives retransmission data of the first data or receives initial transmission data of the second data according to the first time domain resource and the second time domain resource.
  • UE1 receives retransmission data of the first data and initial transmission data of the second data, and UE1 determines, according to the first time domain resource and the second time domain resource, to process the retransmission of the first data through the HARQ process corresponding to the first HPN.
  • the data is transmitted without processing the initially transmitted data of the second data, or it is determined that the HARQ process corresponding to the first HPN processes the initially transmitted data of the second data and does not process the retransmitted data of the first data.
  • the first time domain resource is the time domain resource corresponding to the first PDCCH
  • the second time domain resource is the time domain resource corresponding to the second PDCCH.
  • Time domain resources are measured in units such as subframes (subframes), time slots (slots), mini-slots (mini-slots), or orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.
  • the retransmission data of the first data and the initial transmission data of the second data need to be processed by the same HARQ process, and one HARQ process can only process one piece of data at the same time.
  • the time domain resource for UE1 to receive the second PDCCH or in other words, the time domain resource for receiving the second DCI
  • UE1 will face the same
  • the problem of two data needs to be processed through the same HARQ process at one moment, and UE1 obviously can only choose to process one of the data.
  • UE1 since UE1 has received the second PDCCH, UE1 will clear the buffer corresponding to the HARQ process corresponding to the first HPN, so that even if UE1 receives the retransmission data of the first data scheduled by the first PDCCH, because If the last stored first data with transmission error is lost, UE1 cannot obtain correct first data, that is, UE1 loses the opportunity to obtain correct first data, which will increase the packet loss rate of UE and affect downlink. Data reliability. Then, in this embodiment of the present application, UE1 can determine whether to receive retransmission data of the first data or initial transmission data of the second data according to the first time domain resource and the second time domain resource, thereby improving the acquisition of correct first data. The probability.
  • UE1 may receive retransmission data of the first data and initial transmission data of the second data, but may determine which data to process according to the first time domain resource and the second time domain resource, that is, UE1 passes the corresponding data of the first HPN
  • the HARQ process can process the initial transmission data of the second data without processing the retransmission data of the first data, or the UE1 can process the retransmission data of the first data through the HARQ process corresponding to the first HPN without processing the initial transmission data of the second data
  • UE1 can discard it. In this way, the acquisition of correct first data can also be improved.
  • the time domain resource corresponding to the PDCCH is the time domain resource for receiving the PDCCH.
  • the time domain resource corresponding to the PDCCH includes the start symbol or the end symbol of the PDCCH.
  • the symbols described in the various embodiments of this application refer to orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.
  • the first time domain resource is the time domain resource for UE1 to receive the first PDCCH (or, in other words, to receive the first DCI), for example, the start symbol of the first PDCCH, or the end symbol of the first PDCCH.
  • the second time domain resource is the time domain resource for UE1 to receive the second PDCCH (or, in other words, to receive the second DCI), for example, the start symbol of the second PDCCH, or the end symbol of the second PDCCH.
  • the time domain resource of the PDCCH is the time domain resource of the data scheduled by the PDCCH.
  • the time domain resource of the data scheduled by the PDCCH includes the start symbol or the end symbol of the data scheduled by the PDCCH.
  • the first time domain resource is the time domain resource of the retransmitted data of the first data, for example, the start symbol of the retransmitted data of the first data, or the end symbol of the retransmitted data of the first data.
  • the network device will send the retransmission data of the first data in the first time domain resource, and the UE1 can also detect and receive the retransmission data of the first data in the first time domain resource; the second time domain resource is the initial data of the second data.
  • the time domain resource for data transmission is, for example, the start symbol or the end symbol of the second data.
  • the network device will send the initial transmission data of the second data in the second time domain resource, and the UE may also detect and receive the initial transmission data of the second data in the second time domain resource.
  • the UE1 can receive the retransmission data of the first data but not the initial transmission data of the second data, or , UE1 can receive the retransmission data of the first data and the initial transmission data of the second data, but UE1 processes the retransmission data of the first data and does not process the initial transmission data of the second data through the HARQ process corresponding to the first HPN; or , if the first time domain resource is equal to the second time domain resource (or in other words, the first time domain resource and the second time domain resource are the same time domain resource), the UE1 can receive the retransmission data of the first data without Receive the initial transmission data of the
  • UE1 processes the initial transmission data of the second data and does not process the retransmission data of the first data through the HARQ process corresponding to the first HPN.
  • the above rules are specified by, for example, a protocol, or can be configured to UE1 by sending indication information by a network device.
  • the UE1 may receive retransmission data of the first data, but not receive the initial data of the second data.
  • UE1 may receive retransmission data of the first data and initial transmission data of the second data, but UE1 processes the retransmission data of the first data through the HARQ process corresponding to the first HPN and does not process the initial transmission data of the second data. transmit data.
  • the start symbol of the second time domain resource is earlier than the first symbol after the first duration after the start symbol of the first time domain resource, or the end symbol of the second time domain resource is earlier than the first time domain resource
  • the first symbol after the first duration after the end symbol of UE1 may receive the retransmission data of the first data but not the initial transmission data of the second data, or UE1 may receive the retransmission data of the first data and the initial transmission data of the second data, but UE1 processes the retransmission data of the first data and does not process the initial transmission data of the second data through the HARQ process corresponding to the first HPN; or, the start symbol of the second time domain resource is The first symbol after the first duration after the start symbol of the first time domain resource, or the end symbol of the second time domain resource is the first symbol after the first duration after the end symbol of the first time domain resource , UE1 can receive the retransmission data of the first data but not the initial transmission data of the second data, or, UE1 can receive the retransmission data
  • the HARQ process corresponding to the HPN processes the retransmission data of the first data and does not process the initial transmission data of the second data; or, the start symbol of the second time domain resource is later than the first time domain resource after the start symbol of the first time domain resource.
  • the first symbol after the duration, or the end symbol of the second time domain resource is later than the first symbol after the first duration after the end symbol of the first time domain resource, then UE1 can receive the retransmission data of the first data , and does not receive the initial transmission data of the second data, or UE1 can receive the retransmission data of the first data and the initial transmission data of the second data, but UE1 processes the retransmission of the first data through the HARQ process corresponding to the first HPN data and do not process the first transmitted data of the second data.
  • the above rules are specified by, for example, a protocol, or can be configured to UE1 by sending indication information by a network device.
  • the first duration may be specified by a protocol, or the first duration may also be configured by a network device. If configured by the network device, the network device may send the indication information for configuring the first duration to the UE, for example, the network device may send the indication information by means of broadcast, multicast or unicast, or the network device may transmit the indication information by means of high-level information
  • the order indicates the first duration.
  • the high-level signaling may refer to signaling sent by a high-level protocol layer, and the high-level protocol layer includes at least one protocol layer above the physical layer.
  • the high-level protocol layer may include at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (packet data convergence protocol) , PDCP) layer, radio resource control (radio resource control, RRC) layer, or, non-access stratum (non access stratum, NAS).
  • MAC medium access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • non-access stratum non access stratum
  • the indication information may indicate the first duration, for example, the indication information may indicate the first duration in units of subframes, time slots, symbols, seconds, milliseconds, or microseconds.
  • the indication information indicates 10 symbols, and the second time domain resource is located within the first time period after the first time domain resource, which may mean that the start symbol of the second time domain resource is located no later than the first time domain resource. Within 10 symbols after the start symbol of the resource. After the corresponding UE receives the indication information, it can determine the first duration.
  • the base station can retransmit it, and the UE still has a chance to receive it.
  • the UE will clear the cache and delete the first data that received the wrong last time. , causing the UE to lose the opportunity to obtain correct data, which increases the reception error rate of the UE. Therefore, the embodiments of the present application believe that the UE should try to give priority to receiving retransmitted data, so as to have more opportunities to obtain correct data.
  • the UE can choose to receive the retransmission data of the first data, so that the UE1 will not clear the first HPN
  • the cache of the corresponding HARQ process can obtain the correct first data according to the retransmission data of the first data and the wrong first data stored in the cache, so as to improve the success rate of data reception and ensure the reliability of data transmission. sex.
  • UE1 can choose to receive (or, process) the initial transmission data of the second data, because in this case, the base station may not schedule the retransmission data of the first data.
  • the base station may schedule retransmission errors, so UE1 can receive (or, process) the initial transmission data of the second data to improve the success rate of receiving the initial transmission data, and if UE1 correctly receives the initial transmission data of the second data, The network device does not need to retransmit the second data, which reduces the number of retransmissions and saves transmission resources.
  • the network device sends a third PDCCH.
  • the UE receives the third PDCCH from the network device.
  • the network device sends the initial transmission data of the first data, and correspondingly, the UE receives the initial transmission data of the first data from the network device.
  • the network device sends the first PDCCH to the UE1, and correspondingly, the UE1 receives the first PDCCH from the network device.
  • the network device sends the retransmission data of the first data scheduled by the first DCI to the UE1.
  • the network device sends the retransmission data of the first data to the UE1 in a unicast manner. If the UE1 wants to receive the retransmission data of the first data, it can detect and receive the retransmission data of the first data according to the scheduling information included in the first DCI.
  • the network device does not send the second PDCCH within the first time period after sending the first PDCCH.
  • the network device does not send DCI through the second PDCCH within the first time period after sending the first PDCCH.
  • the UE1 within the first time period after receiving the first PDCCH, the UE1 will not send DCI through the second The PDCCH receives the DCI.
  • This DCI may be referred to as the second DCI.
  • the second DCI can be used to schedule the second data.
  • the NDI included in the second DCI is reversed relative to the NDI included in the DCI sent by the network device last time, indicating that the second DCI schedules the initial transmission of the second data.
  • the second DCI includes the first HPN. That is, if the network device sends the second DCI, for UE1, the initial transmission data of the second data and the retransmission data of the first data need to be processed through the same HARQ process.
  • the time domain resource for UE1 to receive the second PDCCH (or in other words, the time domain resource for receiving the second DCI) is located before the time domain resource for UE1 to send the feedback information of the retransmission data of the first data
  • the UE will face the same
  • two data needs to be processed by the same HARQ process at a time, and one HARQ process can only process one data at the same time, obviously the UE can only choose to process one of the data.
  • the network device may not send the second PDCCH within the first time period after sending the first PDCCH , then optionally, the network device will not send the initial transmission data of the second data scheduled by the second PDCCH, and the UE1 only needs to process the retransmission data of the first data.
  • the correct first data is obtained from the data and the incorrect first data stored in the buffer of the HARQ process corresponding to the first HPN, thereby improving the probability that the UE obtains the correct data.
  • the network device may not send the initial transmission corresponding to the HARQ process within a certain period of time Therefore, the UE only needs to process the retransmitted data through the HARQ process, which reduces the processing conflict of the HARQ process and improves the probability that the UE obtains correct data.
  • FIG. 5 another communication method provided by an embodiment of the present application is introduced.
  • the network device sends the third PDCCH, and correspondingly, the UE receives the third PDCCH from the network device.
  • the network device sends the DCI through the third PDCCH, that is, the DCI is carried in the PDCCH, and accordingly, the UE receives the DCI through the third PDCCH, that is, receives the DCI carried in the third PDCCH.
  • This DCI may be referred to as a third DCI.
  • the third DCI is used for scheduling the third data, and the third DCI includes a third sequence number, where the third sequence number indicates the second HPN for processing the third data.
  • the correspondence between the HPN and the sequence number may be set for the UE, and for different UEs, the correspondence may be the same or different.
  • the HPN and the sequence number may be in one-to-one correspondence. Different correspondences may share the same serial number. For example, in different correspondences, serial numbers 1 and 2 are included.
  • the HPNs corresponding to the same sequence number may be the same or different for different UEs. For example, refer to Table 1, which is the corresponding relationship set for 4 UEs. In Table 1, in order to reflect that different correspondences share the serial number, the serial number only appears once.
  • Table 1 only takes two sequence numbers as an example. In fact, the corresponding relationship set for the UE may include fewer or more sequence numbers. For example, Table 1 may also include sequence number 3. For sequence number 3, UE1, UE3, UE4 corresponds to HPN1, but UE2 corresponds to HPN2; for another example, Table 1 may also include sequence number 4, for sequence number 4, UE1 and UE4 correspond to HPN1, but UE2 and UE3 correspond to HPN2, and so on.
  • the corresponding relationship of each UE may be specified by a protocol, or may also be configured by a network device. If configured by the network device, the network device can send the configured correspondence to the corresponding UE. Since the corresponding relationship configured for different UEs may be different, the network device can send the corresponding relationship to each UE through a unicast message.
  • the network device configures a corresponding relationship for the first UE, and the first UE is, for example, UE1. Then the network device can send the first configuration information to the UE1, and accordingly, the UE1 receives the first configuration information from the network device, and the first configuration information can configure the correspondence between the HPN and the serial number for the UE1.
  • the first configuration information is carried, for example, in higher layer signaling.
  • the first configuration information may configure K HPNs, and in the first configuration information, one HPN among the K HPNs corresponds to a serial number, for example, the HPNs correspond to serial numbers one-to-one, then the K HPNs correspond to K serial numbers , K is a positive integer.
  • the K HPNs are numbered from front to back, for example, from 0 to K-1, and the i-th HPN in the K HPNs corresponds to the number i-1, or the K HPNs are numbered from front to back, for example, from 1 to K.
  • the ith HPN among the K HPNs corresponds to number i.
  • the serial number corresponding to an HPN is the serial number corresponding to the HPN.
  • the network device configures 4 HPNs for the first UE, these 4 HPNs are HPN1, HPN3, HPN 5, and HPN 7, respectively, and the sequence numbers corresponding to these 4 HPNs are 1, 2, 3, and 4, respectively. That is, in the DCI sent by the network device, if the indicated serial number is 1, it corresponds to HPN1, and if the indicated serial number is 2, it corresponds to HPN2. Or, the serial numbers corresponding to the four HPNs are 0, 1, 2, and 3 respectively, that is, in the DCI sent by the network device, if the indicated serial number is 1, it corresponds to HPN 3, and if the indicated serial number is 2 , it corresponds to HPN5.
  • the indicated serial number is 1, it corresponds to HPN1
  • the indicated serial number is 2
  • HPN5 the sequence numbers corresponding to these 4 HPNs are 1, 2, 3, and 4, respectively.
  • the network device also configures a corresponding relationship for the second UE, and the second UE is, for example, UE2. Then the network device can send the second configuration information to the UE2, and accordingly, the UE2 receives the second configuration information from the network device, and the second configuration information can configure the correspondence between the HPN and the serial number for the UE2.
  • the second configuration information may configure M HPNs, and in the second configuration information, one HPN among the M HPNs corresponds to a serial number, for example, the HPNs correspond to serial numbers one-to-one, then the M HPNs correspond to M serial numbers , M is a positive integer.
  • sequence number 2 corresponds to HPN1.
  • the PDCCH may not include the HPN, but include the corresponding sequence number.
  • the serial number can still be indicated by the indication field of the DCI, that is, in this case, the indication field of the DCI does not indicate the HPN, but indicates the serial number. is similar.
  • the sequence number may be indicated by other existing fields of the DCI, or a corresponding field may be added in the DCI to indicate the sequence number, so that the UE can more accurately distinguish whether the DCI indicates the sequence number.
  • the UE can determine the HPN corresponding to the sequence number according to the sequence number included in the PDCCH, thereby determining the HARQ process corresponding to the HPN.
  • the network device wants to send the third PDCCH to UE1 to UE4.
  • the network device has not sent data to UE1 to UE4 before, or although the network device has sent data to UE1 to UE4 before, UE1 to UE4 have all sent data to UE1 to UE4.
  • the network device may include the sequence number 1 in Table 1 in the third PDCCH, for example, the sequence number 1 may also be referred to as the second sequence number.
  • sequence number 1 corresponds to HPN1
  • HPN1 may also be referred to as the second HPN
  • the second HPN corresponds to the second HARQ process. Therefore, each UE can use the same HARQ process to process the third data scheduled by the third PDCCH, without occupying more HARQ processes, which is beneficial to saving HARQ processes.
  • the third PDCCH may not include the sequence number, but may include the HPN, for example, the third PDCCH includes HPN1, which can also make each UE
  • the HARQ process corresponding to the same HPN is used to process the third data scheduled by the third PDCCH.
  • the NDI included in the third DCI is reversed relative to the NDI included in the DCI that carried the same HPN last time on the network device, indicating that the DCI schedules the initial transmission of the third data.
  • the network device schedules the third data to a group of UEs by broadcasting or multicasting, and this group of UEs includes multiple UEs, so it is possible that these multiple UEs can receive the third PDCCH, then S52 is the number of UEs in this group of UEs.
  • S52 is the number of UEs in this group of UEs.
  • the network device sends the initial transmission data of the third data, and correspondingly, the UE receives the initial transmission data of the third data from the network device. Similarly, since the network device sends the third PDCCH through broadcast or multicast, the network device also sends the initial data of the third data through broadcast or multicast, and there may be multiple UEs that can receive the third data. For the initial data transmission, S52 takes UE1 as an example.
  • the UE1 After receiving the initial transmission data of the third data, the UE1 sends feedback information to the network device, where the feedback information is, for example, ACK or NACK, to indicate whether the initial transmission data of the third data is successfully received. For example, if UE1 sends a NACK to the network device, after receiving the NACK, the network device determines that UE1 fails to receive the initial transmission of the third data, and the network device can retransmit the third data to UE1 to improve UE1's success in receiving the third data. Rate. In addition, since the network device still has new data (eg, first data) that needs to be sent to UE1 to UE4, the network device can continue to send new data to UE1 to UE4. In this case, S53 to S58 can be executed.
  • the feedback information is, for example, ACK or NACK
  • the network device can continue to schedule new data to this group of UEs through broadcast or multicast (but the sequence number included in the DCI
  • the sequence number included in the second DCI in S56 may be different, for example, the DCI may include sequence number 1), or the network device may also stop scheduling.
  • the network device sends the second PDCCH to the UE1, and correspondingly, the UE1 receives the second PDCCH from the network device.
  • the network device sends the DCI to the UE1 through the second PDCCH, and correspondingly, the UE1 receives the DCI through the second PDCCH.
  • This DCI may be referred to as the second DCI.
  • the second DCI may be used to schedule the second data, and the second DCI may include the second HPN.
  • the NDI included in the second DCI is not inverted relative to the NDI included in the third DCI sent by the network device to the UE last time, indicating that the second data scheduled by the first DCI is retransmission data of the third data.
  • the cache of the second HARQ process of UE1 will store the wrong third data, so the second DCI instructs the UE to continue through the second HARQ process.
  • the second data scheduled by the second DCI is processed, and the second data is retransmission data of the third data, so that the UE1 can obtain correct third data according to the newly scheduled second data and the wrong third data.
  • the network device Since among UE1 to UE4, only UE1 fails to receive the initial transmission of the third data, while UE2 to UE4 successfully receives the initial transmission of the third data, so the network device only needs to schedule the retransmission of the third data for UE1. For UE2 to UE4, it is not necessary to schedule retransmission of the third data, and the network device may schedule the retransmission of the third data for UE1 by using a unicast method. For example, the second PDCCH may be scrambled using C-RNTI.
  • the network device sends the second data scheduled by the second DCI to the UE1, and correspondingly, the UE1 receives the second data from the network device.
  • the network device sends the second data to the UE1 in a unicast manner, and the UE1 may detect and receive the second data according to the scheduling information included in the second DCI.
  • the UE1 uses the HARQ process corresponding to the second HPN to process the retransmitted second data, that is, the retransmitted data of the third data.
  • the UE1 uses the second HARQ process to process the second data.
  • the buffer of the second HARQ process stores the initial transmission data of the wrong third data transmitted last time, and the UE1 can obtain the correct third data according to the wrong third data and the second data retransmitted this time.
  • the network device sends the first PDCCH, and correspondingly, the UE receives the first PDCCH from the network device.
  • the network device sends the DCI through the first PDCCH, and correspondingly, the UE receives the DCI through the first PDCCH.
  • This DCI may be referred to as the first DCI.
  • the first DCI can be used to schedule the first data.
  • the network device schedules the first data to a group of UEs by broadcasting or multicasting.
  • This group of UEs includes multiple UEs, so it is possible that all of the multiple UEs can receive the first PDCCH.
  • S56 takes UE1 in this group of UEs as an example. Since the network device schedules the first data to a group of UEs in a broadcast or multicast manner, the first PDCCH may be scrambled with G-RNTI.
  • the network device can continue to schedule the first data for UE1 to UE4 in addition to scheduling the retransmission data of the third data (ie, the second data) for UE1 initial data.
  • the third data ie, the second data
  • it is necessary to use the second HARQ process to process the retransmission data of the third data so the network device cannot schedule UE1 to use the second HARQ process to reprocess the initial transmission data of the first data, otherwise there will be conflicts, which may lead to UE1 Loss of third data.
  • the network device may schedule the UE1 to use other HARQ processes other than the second HARQ process to process the initially transmitted data of the first data.
  • the network device may schedule the UE1 to use other HARQ processes other than the second HARQ process to process the initially transmitted data of the first data.
  • the network device may schedule the UE1 to use other HARQ processes other than the second HARQ process to process the initially transmitted data of the first data.
  • the network device is When UE2 to UE4 schedule the initial transmission of the first data, they may continue to schedule UE2 to UE4 to use the second HARQ process to process the initial transmission of the first data, or the network device is scheduling the initial transmission of the first data for UE2 to UE4 At the time, UE2 to UE4 may also be scheduled to use other HARQ processes except the second HARQ process to process the initial transmission data of the first data. However, the network device schedules the initial transmission data of the first data for UE1 to UE4 by broadcasting, so the network device needs to indicate different HPNs for different UEs in one scheduling.
  • the network device can use the sequence In the manner of indicating the HPN by the number, the same sequence number is used to indicate different HPNs for different UEs.
  • the sequence numbers and the HPNs refer to the description in S51.
  • the network device includes the first sequence number in the first PDCCH (or, in other words, the first DCI), and in the correspondence of UE1, the first sequence number corresponds to the first HPN, and the first HPN is the HARQ process corresponding to the first HPN
  • the first sequence number corresponds to the third HPN
  • the third HPN is the process number of the HARQ process corresponding to the third HPN
  • the first sequence number can also correspond to
  • the third HPN or the first serial number may correspond to other HPNs, and the corresponding relationship of UE4 is also the same.
  • the first sequence number is sequence number 2 in Table 2, then for UE1, sequence number 2 corresponds to HPN2, HPN2 is, for example, the first HPN, and for UE2 to UE4, sequence number 2 corresponds to HPN1, that is, if Taking the sequence number 2 in Table 2 as an example, in the correspondence between UE2 to UE4, the first sequence number corresponds to the second HPN, and at this time, the second HPN and the third HPN are the same HPN. In this way, the network device can schedule different HPNs for different UEs even if the initial transmission of the first data is scheduled by broadcast or multicast.
  • the retransmission data of the third data and the initial transmission data of the first data can be processed in different HARQ processes.
  • UE1 places the retransmission data of the third data in the corresponding second HPN.
  • the first data is processed in the HARQ process
  • the initial transmission data of the first data is processed in the HARQ process corresponding to the first HPN, which avoids conflicts, reduces the probability that the UE loses the retransmitted data, and improves the probability that the UE obtains correct data. .
  • the network device sends the initial transmission data of the first data scheduled by the first DCI, and accordingly, the UE1 receives the initial transmission data of the first data from the network device.
  • the UE1 to UE4 can all receive the initial transmission data of the first data, and UE1 is used as an example in S57.
  • UE1 may detect and receive initial transmission data of the first data according to the scheduling information included in the first DCI.
  • UE1 uses the HARQ process corresponding to the first HPN to process the initial transmission data of the first data.
  • the HARQ process corresponding to the second HPN is used to process the initial transmission data of the first data.
  • the first DCI includes the first sequence number
  • the first sequence number corresponds to the first HPN
  • the UE1 uses the HARQ process corresponding to the first HPN to process the initial transmission data of the first data.
  • the first sequence number corresponds to the second HPN
  • UE2 to UE4 use the HARQ process corresponding to the second HPN to process the initial transmission data of the first data. Therefore, UE1 can use the HARQ process corresponding to the second HPN to process the retransmitted second data, and use the HARQ process corresponding to the first HPN to process the initial transmission data of the first data.
  • UE2 to UE4 can continue to use the HARQ process corresponding to the second HPN to process the initial transmission data of the first data without occupying other HARQ processes of UE2 to UE4, which is beneficial to save the HARQ process and enables the UE to process more data .
  • the network device can schedule retransmission in a unicast manner, saving scheduling resources, and does not affect the normal operation of the UE without errors. Moreover, even if there is an error in the initial transmission through broadcast or multicast scheduling, when the HARQ process is insufficient, the network device can continue to use the HARQ process corresponding to the last broadcast or multicast scheduling to continue scheduling the initial transmission, so that HPN resources can be reasonably utilized. Improve the overall efficiency of the system.
  • FIG. 6 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 600 may be the terminal device described in any one of the embodiments shown in FIG. 3 to the embodiments shown in FIG. 5 , and is configured to implement the method for the terminal device in the foregoing method embodiments.
  • the communication apparatus may also be the network device described in any one of the embodiments shown in FIG. 3 to the embodiments shown in FIG. 5 , for implementing the method corresponding to the network device in the foregoing method embodiments.
  • Communication device 600 includes one or more processors 601 .
  • the processor 601 may also be referred to as a processing unit, and may implement certain control functions.
  • the processor 601 may be a general-purpose processor or a special-purpose processor, or the like. For example, including: baseband processors, central processing units, application processors, modem processors, graphics processors, image signal processors, digital signal processors, video codec processors, controllers, memories, and/or Neural network processors, etc.
  • the baseband processor may be used to process communication protocols and communication data.
  • the central processing unit may be used to control the communication device 600, execute software programs and/or process data.
  • the different processors can be stand-alone devices, or they can be integrated in one or more processors, for example, on one or more application specific integrated circuits.
  • the communication apparatus 600 includes one or more memories 602 for storing instructions 604, and the instructions can be executed on the processor, so that the communication apparatus 600 executes the methods described in the above method embodiments.
  • the memory 602 may also store data.
  • the processor and the memory can be provided separately or integrated together.
  • the communication apparatus 600 may include instructions 603 (sometimes also referred to as codes or programs), and the instructions 603 may be executed on the processor, so that the communication apparatus 600 executes the methods described in the above embodiments .
  • Data may be stored in the processor 601 .
  • the communication apparatus 600 may further include a transceiver 605 and an antenna 606 .
  • the transceiver 605 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, an input/output interface, etc., and is used to implement the transceiver function of the communication device 600 through the antenna 606 .
  • the communication device 600 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (universal serial bus, USB) interface, a power management module, an antenna, Speakers, microphones, I/O modules, sensor modules, motors, cameras, or displays, etc. It can be understood that, in some embodiments, the communication apparatus 600 may include more or less components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 601 and the transceiver 605 described in the embodiments of the present application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency identification (RFID), a mixed-signal IC, and an application specific integrated circuit (application specific integrated circuit). integrated circuit, ASIC), printed circuit board (printed circuit board, PCB), or electronic equipment, etc.
  • IC integrated circuit
  • ASIC radio frequency identification
  • PCB printed circuit board
  • electronic equipment etc.
  • it may be an independent device (eg, an independent integrated circuit, a mobile phone, etc.), or may be a part of a larger device (eg, a module that can be embedded in other devices). The description of the terminal device and the network device will not be repeated here.
  • the embodiments of the present application provide a terminal device (for convenience of description, referred to as UE), which can be used in the foregoing embodiments.
  • the terminal device includes corresponding means, units and/or circuits for implementing the UE functions described in the embodiments shown in FIG. 3 , FIG. 4 , and/or FIG. 5 .
  • a terminal device includes a transceiver module, which is used to support the terminal device to implement a transceiver function, and a processing module, which is used to support the terminal device to process signals.
  • FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 700 may be applicable to the architecture shown in any one of FIG. 1 and FIG. 2A to FIG. 2C .
  • FIG. 7 only shows the main components of the terminal device 700 .
  • the terminal device 700 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control the entire terminal device 700, execute software programs, and process data of the software programs.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the control circuit.
  • the control circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data .
  • FIG. 7 only shows one memory and processor.
  • terminal device 700 may include multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present invention.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processing unit is mainly used to control the entire terminal device 700.
  • the software program is executed, and the data of the software program is processed.
  • the processor in FIG. 7 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus.
  • the terminal device 700 may include multiple baseband processors to adapt to different network standards, the terminal device 700 may include multiple central processors to enhance its processing capability, and various components of the terminal device 700 may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and control circuit with a transceiving function can be regarded as the transceiving unit 710 of the terminal device 700
  • the processor having a processing function can be regarded as the processing unit 720 of the terminal device 700
  • the terminal device 700 includes a transceiver unit 710 and a processing unit 720 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the device for implementing the receiving function in the transceiver unit 710 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 710 may be regarded as a transmitting unit, that is, the transceiver unit 710 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the embodiment of the present application also provides a network device, and the network device can be used in each of the foregoing embodiments.
  • the network device includes means, units and/or circuits for implementing the functions of the network device described in the embodiments shown in FIG. 3 , FIG. 4 , and/or FIG. 5 .
  • the network device includes a transceiver module to support the terminal device to implement a transceiver function, and a processing module to support the network device to process signals.
  • FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device may be applicable to the architecture shown in any one of FIG. 1 and FIG. 2A to FIG. 2C .
  • the network equipment includes: a baseband device 801 , a radio frequency device 802 , and an antenna 803 .
  • the radio frequency device 802 receives the information sent by the terminal device through the antenna 803, and sends the information sent by the terminal device to the baseband device 801 for processing.
  • the baseband device 801 processes the information of the terminal device and sends it to the radio frequency device 802
  • the radio frequency device 802 processes the information of the terminal device and sends it to the terminal device through the antenna 803 .
  • the baseband device 801 includes one or more processing units 8011 , storage units 8012 and interfaces 8013 .
  • the processing unit 8011 is configured to support the network device to perform the functions of the network device in the foregoing method embodiments.
  • the storage unit 8012 is used to store software programs and/or data.
  • the interface 8013 is used for exchanging information with the radio frequency device 802, and the interface includes an interface circuit for inputting and outputting information.
  • the processing unit is an integrated circuit, such as one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form chips.
  • the storage unit 8012 and the processing unit 8011 may be located in the same chip, that is, an on-chip storage element. Alternatively, the storage unit 8012 may be located on a different chip from the processing unit 8011, that is, an off-chip storage element.
  • the storage unit 8012 may be a memory, or may be a collective term for multiple memories or storage elements.
  • the network device may implement some or all of the steps in the foregoing method embodiments in the form of one or more processing unit schedulers. For example, the corresponding functions of the network device in the embodiments shown in any of FIG. 3 , FIG. 4 and/or FIG. 5 are implemented.
  • the one or more processing units may support wireless access technologies of the same standard, or may support wireless access standards of different standards.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division.
  • the units described as separate components may or may not be physically separated.
  • the components shown may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • the computer-readable medium may include random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), Erasable programmable read only memory (erasable PROM, EPROM), electrically erasable programmable read only memory (electrically erasable programmable read only memory, EEPROM), compact disc read-only memory (compact disc read-only memory, CD- ROM), universal serial bus flash disk, removable hard disk, or other optical disk storage, magnetic disk storage medium, or other magnetic storage device, or capable of carrying or storing desired data in the form of instructions or data structures program code and any other medium that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • PROM programmable read-only memory
  • EPROM Erasable programmable read only memory
  • EEPROM electrically erasable programmable read only memory
  • compact disc read-only memory compact disc read-only memory
  • CD- ROM compact disc read-only memory
  • universal serial bus flash disk removable hard disk,
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé et un appareil de communication. Un premier canal de commande de liaison descendante et un deuxième canal de commande de liaison descendante d'un dispositif de réseau sont reçus, le premier canal de commande de liaison descendante étant utilisé pour programmer des données de retransmission, et le deuxième canal de commande de liaison descendante étant utilisé pour programmer des données de transmission initiales ; selon une première ressource de domaine temporel et une seconde ressource de domaine temporel, les données de retransmission sont reçues, ou les données de transmission initiales sont reçues, la première ressource de domaine temporel étant une ressource de domaine temporel correspondant au premier canal de commande de liaison descendante, et la seconde ressource de domaine temporel étant une ressource de domaine temporel correspondant au deuxième canal de commande de liaison descendante. Un dispositif de terminal peut recevoir des données de transmission initiales dans certains cas et recevoir des données de retransmission dans certains cas ; si le dispositif de terminal reçoit les données de retransmission, le dispositif de terminal ne videra pas la mémoire cache, et peut obtenir des données correctes selon les données de retransmission et les données erronées stockées dans la mémoire cache ; ainsi, la précision de réception de données est améliorée, la fiabilité des données est améliorée, et le taux d'utilisation globale de ressources du système est garanti.
PCT/CN2020/121145 2020-10-15 2020-10-15 Procédé et appareil de communication Ceased WO2022077335A1 (fr)

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WO2022077335A1 true WO2022077335A1 (fr) 2022-04-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014069826A1 (fr) * 2012-11-02 2014-05-08 Lg Electronics Inc. Schéma de surveillance de pdcch prenant en compte un epdcch
CN108934078A (zh) * 2017-05-25 2018-12-04 普天信息技术有限公司 一种下行数据传输方法和装置
CN109391379A (zh) * 2017-08-11 2019-02-26 维沃移动通信有限公司 一种harq指示方法、装置及系统
CN109475002A (zh) * 2017-09-08 2019-03-15 电信科学技术研究院 一种下行数据传输的缓存方法、终端及基站
CN110830184A (zh) * 2018-08-09 2020-02-21 北京三星通信技术研究有限公司 块传输方法、下行传输方法、nrs接收方法、ue、基站和介质
WO2020192741A1 (fr) * 2019-03-28 2020-10-01 FG Innovation Company Limited Procédé et appareil à commande de transmission de rétroaction harq et réception multi-pdsch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014069826A1 (fr) * 2012-11-02 2014-05-08 Lg Electronics Inc. Schéma de surveillance de pdcch prenant en compte un epdcch
CN108934078A (zh) * 2017-05-25 2018-12-04 普天信息技术有限公司 一种下行数据传输方法和装置
CN109391379A (zh) * 2017-08-11 2019-02-26 维沃移动通信有限公司 一种harq指示方法、装置及系统
CN109475002A (zh) * 2017-09-08 2019-03-15 电信科学技术研究院 一种下行数据传输的缓存方法、终端及基站
CN110830184A (zh) * 2018-08-09 2020-02-21 北京三星通信技术研究有限公司 块传输方法、下行传输方法、nrs接收方法、ue、基站和介质
WO2020192741A1 (fr) * 2019-03-28 2020-10-01 FG Innovation Company Limited Procédé et appareil à commande de transmission de rétroaction harq et réception multi-pdsch

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