WO2018202059A1 - 传输控制信道的方法、网络设备、网络控制器和终端设备 - Google Patents

传输控制信道的方法、网络设备、网络控制器和终端设备 Download PDF

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Publication number
WO2018202059A1
WO2018202059A1 PCT/CN2018/085414 CN2018085414W WO2018202059A1 WO 2018202059 A1 WO2018202059 A1 WO 2018202059A1 CN 2018085414 W CN2018085414 W CN 2018085414W WO 2018202059 A1 WO2018202059 A1 WO 2018202059A1
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Prior art keywords
resource
terminal device
network
network devices
indication information
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PCT/CN2018/085414
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English (en)
French (fr)
Inventor
杭海存
张茜
毕晓艳
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP18793807.1A priority Critical patent/EP3611982B1/en
Publication of WO2018202059A1 publication Critical patent/WO2018202059A1/zh
Priority to US16/673,318 priority patent/US11246142B2/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0042—Intra-user or intra-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling

Definitions

  • the present application relates to the field of communications and, more particularly, to a method of transmitting a control channel, a network device, a network controller, and a terminal device.
  • Coordination multiple point (CoMP) transmission is a method proposed in Long Term Evolution (LTE) to solve inter-cell interference problem and improve cell edge user throughput.
  • LTE Long Term Evolution
  • NR new radio access technoloty
  • multiple network devices can simultaneously serve the same terminal device and perform independent scheduling, and each network device can independently send physical downlink to the same terminal device.
  • Control downlink physical downlink control channel, PDCCH.
  • PDCCH physical downlink control channel
  • the terminal device needs to blindly check multiple PDCCHs to obtain multiple downlink control information (DCI).
  • DCI downlink control information
  • the resources of the user equipment (UE) search space of each terminal device are limited.
  • resources are likely to occur. Collision, that is, at least two network devices send their respective PDCCHs on the same time-frequency resource, thereby causing DCI to be incorrectly received, affecting data transmission between the network device and the terminal device, that is, affecting the reliable transmission. Sex.
  • the present application provides a method for transmitting a control channel, a network device, a network controller, and a terminal device to avoid resource conflicts between PDCCHs of multiple network devices.
  • a method of transmitting a control channel including:
  • the first network device receives the resource group indication information sent by the network controller, where the resource indicated by the resource group indication information does not overlap with resources used by other network devices;
  • the first network device sends the first physical downlink control channel PDCCH to the terminal device by using the first search space.
  • the resource of the first search space belongs to the UE-specific search space, and belongs to the first resource group.
  • the first network device sends a first physical downlink control channel PDCCH to the terminal device by using the first search space.
  • the time-frequency resource sends the PDCCH, that is, a resource conflict occurs, and interference may occur between the PDCCHs sent by the two or more network devices, causing the terminal device to fail to correctly receive the DCI, thereby affecting the network device and
  • the data between the terminal devices affects the reliability of data transmission.
  • the first network device is allocated a resource group that can be used by the network controller, and the resource group does not overlap with resources of the resource group used by other network devices (for example, the second network device).
  • the resources of each resource group can only be used by the corresponding network device, so that the network device determines the resources that can be used according to the resource groups respectively allocated, and sends the PDCCH within the resource, that is, each
  • the resources used by the network device to transmit the PDCCH are restricted to the resources of the resource group, which avoids resource conflicts, that is, improves the reliability of the PDCCH transmission, and is beneficial to improving the reliability of data transmission.
  • the UE-specific search space of the terminal device includes multiple sub-spaces, and the multiple sub-spaces are discretely distributed in the multiple resource groups.
  • each subspace may correspond to a time-frequency resource in the control resource region, and time-frequency resources occupied by the plurality of sub-spaces are discretely distributed in the plurality of resource groups.
  • the number of control channel elements CCEs included in each subspace is determined by the aggregation level.
  • the number of CCEs included in each subspace can be the same as the value of the aggregation level. This design allows the UE-specific search space to be distributed as evenly as possible across the set of control resources.
  • the number of CCEs included in each subspace is determined by the number of network devices accessed by the terminal device.
  • the CCE resources included in each subspace may be continuous, and multiple subspaces may be discretely distributed in the control resource set.
  • the method further includes:
  • the first network device sends resource group indication information to the terminal device, where the resource group indication information is used to indicate a resource location of a resource group used by the first network device.
  • the terminal device may determine, according to the location of the first resource group and the UE-specific search space, a first search space corresponding to the PDCCH sent by the first network device.
  • the terminal device may determine, according to the second indication information sent by the multiple network devices, the resource locations of the multiple resource groups corresponding to the multiple network devices, and further according to the resource locations of the multiple resource groups and the UE-specific search space respectively. And determining a plurality of search spaces corresponding to the PDCCHs sent by the plurality of network devices.
  • the terminal device may be blindly detected on the plurality of search spaces, wherein, for each search space, if the PDCCH belonging to itself is detected, the detection of the search space is stopped. Therefore, it is advantageous to reduce the amount of calculation of the terminal device.
  • a method of transmitting a control channel including:
  • the network controller allocates, according to the number of the network devices that the terminal device accesses, a plurality of resource groups, the plurality of resource groups, and the plurality of network devices that are accessed by the terminal device from the pre-configured control resource set.
  • the plurality of network devices are in one-to-one correspondence, and resources of any two of the plurality of resource groups do not overlap;
  • the network controller sends a plurality of resource group indication information to the plurality of network devices, where the plurality of resource group indication information is in one-to-one correspondence with the plurality of network devices, and the resource group indication information is used to indicate the The resource location of the resource group that the network device can use.
  • the network controller may be a separate physical device, or may be a software and/or hardware function module integrated on the network device, which is not specifically limited in the present invention.
  • the network controller pre-divides the control resource set into multiple resource groups, where the multiple resource groups are in one-to-one correspondence with multiple network devices, and each resource group can only be used by the corresponding network device.
  • the network controller separately sends the indication information of the resource locations of the multiple resource groups (that is, the resource group indication information) to the plurality of network devices, so that the network devices determine the resources that can be used according to the respective allocated resource groups.
  • transmitting the PDCCH in the resource that is, the resource used by each network device to send the PDCCH is restricted to the resource of the resource group, thereby avoiding resource conflict, that is, improving the reliability of the PDCCH transmission, and facilitating data transmission. reliability.
  • the network controller determines, according to the number of network devices that the terminal device accesses, a plurality of resource groups from the pre-configured control resource set, including:
  • the network controller determines the plurality of resource groups from a preset set of control resources according to a preset rule according to the number of network devices accessed by the terminal device.
  • the preset rule includes: equally allocating resources in the control resource set according to the number of network devices accessed by the terminal device, to obtain the multiple resource groups.
  • the method for dividing resources is relatively simple.
  • the network controller can directly allocate resources in the control resource set according to the number of network devices accessed by the terminal device to obtain multiple resource groups.
  • the preset rule includes: proportionally allocating resources in the control resource set according to channel quality of multiple channels between the terminal device and the multiple network devices, to obtain a Describe multiple resource groups.
  • This method of dividing resources is flexible, and can adaptively adjust resources allocated to each network device according to channel quality.
  • a method for transmitting a control channel including:
  • the terminal device determines a plurality of resource groups from the preset set of control resources, where the plurality of resource groups are in one-to-one correspondence with the plurality of network devices accessed by the terminal device, and any two of the plurality of resource groups Groups do not overlap;
  • the terminal device receives multiple physical downlink control information PDCCHs sent by multiple network devices on the multiple search spaces, and the multiple network devices are in one-to-one correspondence with the multiple PDCCHs.
  • the resources of each search space belong to one resource group, and the resources of the multiple search spaces all belong to the UE-specific search space.
  • the time-frequency resource sends the PDCCH, that is, a resource conflict occurs, and interference may occur between the PDCCHs sent by the two or more network devices, causing the terminal device to fail to correctly receive the DCI, thereby affecting the network device and
  • the data between the terminal devices affects the reliability of data transmission.
  • a plurality of resource groups are allocated to a plurality of network devices that are accessed by the terminal device, and the plurality of resource groups are in one-to-one correspondence with the plurality of network devices, and each resource group can only be used by the corresponding network device, so that
  • the network device determines the resources that can be used according to the allocated resource groups, and sends the PDCCH in the resource, that is, the resources used by each network device to send the PDCCH are restricted to the resources of the resource group, thereby avoiding resource conflicts. That is, the reliability of the PDCCH transmission is improved, which is advantageous for improving the reliability of data transmission.
  • the terminal device determines, by using a preset set of control resources, a plurality of resource groups, including:
  • the terminal device determines a plurality of resource groups from a preset set of control resources according to a predefined rule.
  • the preset rule includes: equally allocating resources in the control resource set according to the number of network devices accessed by the terminal device, to obtain the multiple resource groups.
  • the preset rule includes: proportionally allocating resources in the control resource set according to channel quality of multiple channels between the terminal device and the multiple network devices, to obtain a Describe multiple resource groups.
  • This method of dividing resources is flexible, and can adaptively adjust resources allocated to each network device according to channel quality.
  • the terminal device determines, by using a preset set of control resources, a plurality of resource groups, including:
  • the terminal device may determine, according to the second indication information sent by the multiple network devices, the resource locations of the multiple resource groups corresponding to the multiple network devices, and further determine, according to the resource locations of the multiple resource groups and the UE-specific search space, respectively. Multiple search spaces corresponding to the PDCCH transmitted by the network devices.
  • the terminal device may be blindly detected on the plurality of search spaces, wherein, for each search space, if the PDCCH belonging to itself is detected, the detection of the search space is stopped. Therefore, it is advantageous to reduce the amount of calculation of the terminal device.
  • the UE-specific search space of the terminal device includes multiple sub-spaces, and the multiple sub-spaces are discretely distributed in the multiple resource groups.
  • each subspace may correspond to a time-frequency resource in the control resource region, and time-frequency resources occupied by the plurality of sub-spaces are discretely distributed in the plurality of resource groups.
  • the number of control channel elements CCEs included in each subspace is determined by the aggregation level.
  • the number of CCEs included in each subspace can be the same as the value of the aggregation level. This design allows the UE-specific search space to be distributed as evenly as possible across the set of control resources.
  • the number of CCEs included in each subspace is determined by the number of network devices accessed by the terminal device.
  • the CCE resources included in each subspace may be continuous, and multiple subspaces may be discretely distributed in the control resource set.
  • a network device comprising various modules for performing the method of transmitting a control channel in the first aspect or any of the possible implementations of the first aspect.
  • a network controller comprising various modules for performing the method of transmitting a control channel in any of the possible implementations of the second aspect or the second aspect.
  • a terminal device comprising various modules for performing the method of transmitting a control channel in any of the possible implementations of the third aspect or the third aspect.
  • a network device including a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program for calling and running the computer program from the memory, such that the network device performs the first aspect or any of the possible implementations of the first aspect The method in .
  • a network controller including a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program for calling and running the computer program from the memory, such that the network device performs any of the second aspect or the second aspect The method in .
  • a terminal device including a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the terminal device performs any of the third aspect or the third aspect The method in .
  • a computer program product comprising: computer program code, when the computer program code is executed by a network device, causing the network device to perform the first aspect or the first aspect A method in a possible implementation.
  • a computer program product comprising: computer program code, when the computer program code is executed by a network controller, causing the network controller to perform the second aspect or the The method of any of the possible implementations of the two aspects.
  • a computer program product comprising: computer program code, when the computer program code is executed by a terminal device, causing the terminal device to perform the third aspect or the third aspect described above Any of the possible implementations.
  • a thirteenth aspect a computer readable medium storing program code, the program code comprising for performing any of the first aspect to the third aspect or the first aspect to the third aspect An instruction of a method in a possible implementation.
  • a processing apparatus comprising a processor and an interface.
  • the processor is operative to perform the method of any one of the first aspect to the third aspect or the first aspect to the third aspect, wherein the related data interaction (eg, performing or receiving data transmission) is The above interface is used to complete.
  • the foregoing interface may further complete the data interaction process by using a transceiver.
  • the processing device in the above fourteenth aspect may be a chip, and the processor may be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like;
  • the processor can be a general purpose processor implemented by reading software code stored in a memory that can be integrated into the processor and can be external to the processor.
  • a plurality of network devices are allocated a plurality of resource groups that do not overlap each other, so that the resources used by the network devices to transmit the PDCCH do not overlap, the resource conflict is avoided, and the reliability of the PDCCH transmission is improved.
  • FIG. 1 is a schematic diagram of a communication system suitable for a method of transmitting a control channel in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing the distribution of PDCCH candidate positions under different aggregation levels specified in the current protocol.
  • FIG. 3 is a schematic flowchart of a method of transmitting a control channel according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of allocating resource groups according to preset rules according to an embodiment of the present invention.
  • FIG. 5 is another schematic diagram of allocating resource groups according to a preset rule according to an embodiment of the present invention.
  • FIG. 6 is still another schematic diagram of allocating resource groups according to preset rules according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing the distribution of a UE-specific search space under different aggregation levels according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram showing another distribution of a UE-specific search space at different aggregation levels according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a network device according to an embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a network controller according to an embodiment of the present invention.
  • FIG. 11 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 12 is another schematic block diagram of a network device according to an embodiment of the present invention.
  • FIG. 13 is another schematic block diagram of a network controller according to an embodiment of the present invention.
  • FIG. 14 is another schematic block diagram of a terminal device according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 5G system can also be called a new radio access technology (NR) system.
  • NR new radio access technology
  • the communication system 100 includes: a network controller 110, at least one network device (for example, network device #A 121 and second network device #B 122 shown in the figure) and at least one terminal device ( For example, terminal device #A 131 and terminal device #B 132 shown in the figure.
  • a network controller 110 for example, at least one network device (for example, network device #A 121 and second network device #B 122 shown in the figure) and at least one terminal device ( For example, terminal device #A 131 and terminal device #B 132 shown in the figure.
  • the network device may be a global mobile communication (GSM) system or a base transceiver station (BTS) in a code division multiple access (CDMA) system, or It is a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), and may also be an evolved base station (evolutional node B, eNB or eNodeB) in Long Term Evolution (LTE), or a relay station, an access point, or a radio frequency pull.
  • GSM global mobile communication
  • BTS base transceiver station
  • CDMA code division multiple access
  • NodeB, NB base station
  • WCDMA Wideband Code Division Multiple Access
  • evolutional node B, eNB or eNodeB evolved base station
  • LTE Long Term Evolution
  • RRU Remote radio unit
  • in-vehicle device wearable device
  • network-side device in a future 5G system such as a transmission point (TP), a transmission reception point (TRP), a base station
  • TP transmission point
  • TRP transmission reception point
  • base station base station
  • the small base station device and the like are not particularly limited in this embodiment of the present invention.
  • the terminal device may be mobile or fixed.
  • the terminal device can communicate with one or more core networks through a radio access network (RAN).
  • RAN radio access network
  • a terminal device may also be called a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user. Agent or user device.
  • the terminal device may be a station (station, ST) in a wireless local area network (WLAN), and may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, or a wireless local loop (wireless local Loop, WLL) station, personal digital assistant (PDA) device, handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, and next-generation communication system,
  • PDA personal digital assistant
  • the terminal device in the 5G network or the terminal device in the public land mobile network (PLMN) in the future is not limited in this embodiment of the present invention.
  • the communication system 100 can support CoMP transmission, that is, multiple cells or multiple transmission points can cooperate to transmit data to the same terminal device on the same time-frequency resource or to the same terminal device on partially overlapping time-frequency resources. data.
  • the plurality of cells may belong to the same network device or different network devices, and may be selected according to channel gain or path loss, received signal strength, received signal command, and the like.
  • the terminal device (for example, the terminal device #A131) in the communication system 100 can support multipoint transmission, that is, the terminal device #A131 can communicate with the network device #A 121 or with the network device #B 122, where
  • the network device #A 121 can serve as a service network device, and the service network device refers to the RRC connection, non-access stratum (NAS) mobility management, and security input services for the terminal device through the wireless air interface protocol.
  • NAS non-access stratum
  • the network device #A 121 may be a serving network device, and the network device #B 122 may be a cooperative network device; or, the network device #A 121 may be a cooperative network device, and the network device #B 122 is a serving network device. .
  • the network device #A 121 and the network device #B 122 may be controlled and/or scheduled by the network controller 110.
  • the network controller 110 can perform unified resource scheduling and management on the controlled plurality of network devices (including the above-described network device #A 121 and network device #B 122) based on information obtained and maintained from the respective network devices. For example, control messages and/or indication information and the like are sent to a plurality of network devices that are controlled.
  • the network controller 110 may be a separate physical device (as shown in FIG. 1), or may be a software and/or hardware function module integrated on the network device, which is not specifically limited in the present invention.
  • a network device for example, may be the network device #A 121) that the terminal device (for example, may be the terminal device #A131) is first referred to as a service network device, and the terminal device #A 131 may pass after being powered on. After the cell search selects a suitable or acceptable cell, the connection to the network side is then completed through the attach procedure. After completing the attaching process, the terminal device #A131 can perform data communication with the network device #A 121.
  • the network device #B 122 may be accessed, and the network device #B 122 may listen to the terminal device #A. There is data interaction with the network 131 to infer that the serving network device of the terminal device #A 131 is not itself, and therefore, it is possible to determine that it is the cooperative network device of the terminal device #A 131.
  • the terminal device (e.g., terminal device #B 132) in the communication system 100 can also support single point transmission, i.e., the terminal device #B 132 can communicate only with the network device #A 121.
  • FIG. 1 is only a simplified schematic diagram for easy understanding.
  • the communication system 100 may also include other network devices and/or terminal devices, and the same terminal device may also perform CoMP transmission with more network devices. 1 is not drawn.
  • both the serving network device and the cooperative network device may send control signaling and data to the terminal device.
  • the serving network device and the cooperative network device may simultaneously send control signaling to the terminal device; or the serving network device and the cooperative network device may simultaneously transmit data to the terminal device, or the service network device and the collaboration The network device can simultaneously send control signaling to the terminal device.
  • the terminal device Before the network device and the terminal device perform data transmission, the terminal device needs to receive (or blindly detect) downlink control information (DCI) on the PDCCH to perform physical downlink on the physical downlink according to the indication of the DCI.
  • DCI downlink control information
  • the downlink channel is received on the share channel, PDSCH.
  • multiple network devices can transmit PDCCHs to the same terminal device, and for a specific terminal device, resources occupied by the UE-specific search space can be determined.
  • resource collisions are likely to occur. Therefore, when a plurality of network devices transmit multiple PDCCHs in a UE-specific search space, once a resource conflict occurs, that is, two or more network devices transmit PDCCHs using the same time-frequency resource, the two or more Interference may occur between PDCCHs sent by the network device, causing the terminal device to fail to receive DCI correctly, thereby affecting data transmission between the network device and the terminal device, and affecting the reliability of data transmission.
  • the present application provides a method for transmitting a control channel, which can avoid resource conflicts between PDCCHs of multiple network devices, so as to ensure reliable transmission of the control channel.
  • the control channel involved in the present application may be used to carry resource scheduling information and other control information.
  • the control channel may be a PDCCH, an enhanced physical downlink control channel (EPDCCH), and a new air interface physical downlink control channel (new).
  • PDCCH physical downlink control channel
  • PUCCH physical uplink control channel
  • CCE control channel element
  • REG resource element group
  • AL aggregation level
  • a REG can be understood as a basic unit of physical resource allocation for downlink control signaling, and is used to define mapping of downlink control signaling to resource elements (REs).
  • the current protocol stipulates that one CCE is composed of 9 REGs, and one REG is composed of resource elements (REs) of consecutive non-reference signals (RSs) in the four frequency domains, that is, A CCE consists of 36 REs.
  • One PDCCH can be transmitted on L consecutive CCEs, and each CCE is composed of 9 REGs.
  • L is the aggregation level, indicating the number of CCEs included in the search space.
  • the value of L may be 1, 2, 4, or 8, and may even be 16, 32.
  • the value of the aggregation level in the embodiment of the present invention is not particularly limited.
  • the search space may include: a common search space and a UE-specific search space.
  • the common search space is used for transmitting common information at the cell level, and may include, for example, control information related to paging, random access response (RAR), broadcast control channel (BCCH), and the like.
  • the UE-specific search space is used for transmitting information of the terminal equipment (or UE) level, and may include, for example, a downlink shared channel (DL-SCH), an uplink shared channel (UL-SCH), and the like.
  • DL-SCH downlink shared channel
  • UL-SCH uplink shared channel
  • the common search space and the UE-specific search space are two types of search spaces defined in the LTE protocol.
  • the UE-specific search space is taken as an example, but the present invention should not be limited in any way.
  • the possibility of re-division or redefinition of the search space is not excluded, and any resource for transmitting information at the terminal device level may be defined as the UE-specific search space described in the embodiment of the present invention.
  • a search space is defined for a CCE aggregation level.
  • a terminal device may have multiple search spaces, and CCEs in each search space may be continuously distributed.
  • the terminal device needs to monitor a group of PDCCH control channels, and the group of monitored PDCCH control channels may be referred to as a “control channel candidate set”. (candidate control channel set)", or "control channel candidate”.
  • Table 1 shows the correspondence between the aggregation level L, the number of available CCEs (or the search space size) N CCE,k and the number of PDCCH candidates M (L) to be monitored in a given search space:
  • the size of the search space is different, and the number of PDCCH candidates is also different.
  • the size of the search space M M (L) ⁇ L, or the number of CCEs included in the search space is the product of the aggregation level and the number of PDCCH candidates.
  • Table 1 is only for ease of understanding, and the aggregation level L, the search space size N CCE,k defined in the LTE protocol , and the number of PDCCH candidates M (L) to be monitored in a given search space are explained between the parameters. Correspondence, but this should not constitute any limitation to the embodiments of the present invention, and the present application does not exclude the aggregation level L, the search space size N CCE, k and the PDCCH candidate to be monitored in a given search space in future protocols. The correspondence between the numbers M (L) is redefined, and the possibility of defining more parameters is not excluded.
  • FIG. 2 is a schematic diagram showing the distribution of UE-specific search spaces under different aggregation levels specified in the current protocol.
  • the number of PDCCH candidates is 6, and the size of the search space is 6 CCEs, and the 6 CCEs are continuously distributed in time-frequency resources.
  • the number of PDCCH candidates is 6, and the size of the search space is 12 CCEs; and so on, for the sake of brevity, it will not be enumerated here.
  • search spaces at the same aggregation level shown in the figure correspond to different shaded areas, and each shade represents one candidate position of the PDCCH.
  • each shade represents one candidate position of the PDCCH.
  • the control channel can be divided into a plurality of control resource sets, each control resource set being a set of REGs.
  • the terminal device can listen to the PDCCH on one or more sets of control resources.
  • a control resource set may be understood as a resource occupied by a control channel; for a terminal device, a search space of a PDCCH of each terminal device belongs to the control resource set.
  • the network device may determine, from the set of control resources, a resource used for transmitting the PDCCH, and the terminal device may determine a search space of the PDCCH from the set of control resources.
  • the control resource set may include time-frequency resources, for example, the frequency domain may be a piece of bandwidth, or one or more sub-bands, etc.; the time domain may be the number of time units, for example, a subframe or a time slot or a micro time. The number of symbols in the slot; the time-frequency domain may be a continuous or discontinuous resource unit, for example, a continuous resource block (RB) or a discontinuous RB.
  • the definition of the RB may be a resource defined in an existing LTE protocol, or may be a resource defined in a future protocol, or may be replaced with another naming.
  • the time unit may be a subframe, or may be a slot, or may be a radio frame, a mini slot or a sub slot, multiple aggregated slots, and multiple aggregated subframes.
  • the symbol, the symbol, and the like may even be a transmission time interval (TTI), which is not specifically limited in the embodiment of the present application.
  • TTI transmission time interval
  • the method 300 can be applied to a wireless communication system, which can include a network controller, a network device, and a terminal device, and the plurality of network devices can transmit data to the terminal device by means of CoMP.
  • the communication system can be the communication system 100 shown in FIG.
  • the network controller may be the network controller 110 in FIG. 1, and the plurality of network devices may include network device #1 and network device #2 that transmit data with the same terminal device, and the network device #1 may be the one in FIG. Network device #A 110, the network device #2 may be the network device #B120 in FIG. 1, or the network device #1 may be the network device #B 122 in FIG. 1, and the network device #2 may be FIG.
  • the first network device #A 121 in the middle which may be the first terminal device #A 131 in FIG.
  • the method 300 includes:
  • the network controller determines, according to the number of network devices that the terminal device accesses, a plurality of resource groups from the pre-configured control resource set.
  • the network controller can learn the connection relationship between each network device and the terminal device in the communication system, so the network controller can determine the number of network devices that each terminal device accesses.
  • the network controller may determine multiple resource groups from the pre-configured control resource set according to the number of network devices accessed by the terminal device.
  • the plurality of resource groups have a one-to-one correspondence with a plurality of network devices accessed by the terminal device. For example, if the terminal device accesses the network device #1 and the network device #2, the network controller divides the control resource set into two resource groups, for example, the resource group #1 and the resource group #2, respectively. Among them, resource group #1 can only be used by network device #1, and resource group #2 can only be used by network device #2.
  • the network controller may determine the multiple resource groups from the pre-configured control resource set according to the preset number of network devices accessed by the terminal device.
  • the preset rule may be any one of the following:
  • Rule 1 According to the number of network devices accessed by the terminal device, the resources in the control resource set are evenly allocated to obtain the multiple resource groups.
  • the number of CCEs included in the control resource set is N.
  • the number of network devices is n
  • the number of CCEs occupied by the network controller for each network device is N/n. If N cannot be divisible by n, then N/n can be rounded up or rounded down. That is, the number of CCEs included in the resource group to which each network device is assigned or,
  • the CCEs in the resource group of each network device are contiguous.
  • the CCEs included in the resource group #1 corresponding to the network device #1 have a number range of [1, K] in the N CCEs
  • the resource group #2 corresponding to the network device #2 includes the CCEs in the N groups.
  • the number range in the CCE is [K+1, 2K]
  • the CCEs included in the resource group (for example, referred to as resource group #3) corresponding to another network device for example, referred to as network device #3) are in N CCEs.
  • the number range is [2K+1, 3K], and so on, and is not listed here.
  • the numbers of CCEs in the above-listed resource groups are merely exemplary and should not be construed as limiting the embodiments of the present invention.
  • the number of the N CCEs may be accumulated in order from any positive integer.
  • FIG. 4 is a schematic diagram of allocating resource groups according to preset rules according to an embodiment of the present invention. As shown in FIG. 4, if the resources in the control resource set are on one subcarrier and occupy 32 consecutive CCEs and the number of network devices is 2, the control resource set can be equally divided into 2 resource groups. Each resource group includes 16 CCEs. The CCEs included in resource group #1 have a number range of [1, 16] in N CCEs, and the CCEs included in resource group #2 have a number range of [17, 32] in N CCEs.
  • the foregoing method for indicating a resource group by using a CCE number is only one possible implementation manner.
  • the CCE starting address and the number of CCEs may also be used. Indicates either the start address and the end address of the CCE, or the end address of the CCE and the number of CCEs.
  • FIG. 5 is another schematic diagram of allocating resource groups according to a preset rule according to an embodiment of the present invention. As shown in FIG. 5, if the resources in the control resource set are on one subcarrier and occupy 32 consecutive CCEs and the number of network devices is 2, the control resource set can be equally divided into 2 resource groups ( For example, including resource group #1 and resource group #2), each resource group includes 16 CCEs. The number of CCEs included in resource group #1 is [1, 3, ..., 31] in N CCEs, and the number of CCEs included in resource group #2 in N CCEs is [2, 4,... , 32].
  • Rule 2 Proportionally allocate resources in the control resource set according to channel qualities of the multiple channels between the terminal device and the plurality of network devices to obtain the multiple resource groups.
  • the aggregation level used by the PDCCH may be relatively low, for example, the aggregation level may be 1, 2; instead, the channel between the network device and the terminal device
  • the aggregation level used by the PDCCH may be relatively high.
  • the aggregation level may be 4, 8, or even higher.
  • the aggregation level is low, network devices corresponding to lower aggregation levels can be allocated less resources; when the aggregation level is higher, network devices corresponding to higher aggregation levels can be allocated more. Resources.
  • the channel quality between the terminal device and the network device is based on reference signal receiving power (RSRP).
  • RSRP may be the received power of the uplink reference signal.
  • the uplink reference signal may be a sounding reference signal (SRS).
  • the number of CCEs included in the control resource set is N, and when the number of network devices is 2 (for example, including network device #1 and network device #2), network device #1 and network device #2 receive the same SRS reception.
  • the ratio of the power is u:v, and the number of CCEs occupied by the network controller for the resources allocated to the network device #1 is The number of CCEs occupied by the resources allocated by the network controller for network device #2 is If N cannot be divisible by (u+v), then N/(u+v) can be rounded up or rounded down.
  • FIG. 6 is still another schematic diagram of allocating resource groups according to preset rules according to an embodiment of the present invention.
  • the resources in the control resource set are on one subcarrier, and occupy 32 consecutive CCEs, and the number of network devices is 2 (including, for example, network device #1 and network device #2), where The network device #1 and the network device #2 can respectively determine the allocation ratio of the resources according to the ratio of the received power of the received SRS. For example, if the received power ratio of the network device #1 and the network device #2 receiving the SRS is 1:2, the resource ratios assigned to the network device #1 and the network device #2 (that is, the resource group #2 and the resource group #) The resource ratio of 1 is determined to be 2:1.
  • the CCEs in the resource group of each network device are continuous or non-contiguous.
  • any CCE cannot be used by other network devices after being assigned to one network device, that is, assigned to multiple Among the multiple resource groups of the network device, the resources of the resource groups of any two network devices do not overlap.
  • the network controller sends, to the multiple network devices, multiple resource group indication information, where the resource group indication information is used to indicate a resource location of the resource group that the network device can use.
  • the resource group indication information sent by the network controller to the network device is recorded as the first indication information, and the resource group indication information sent by the network device mentioned in the following to the terminal device is used for the purpose of distinguishing and explaining. Recorded as the second indication.
  • the first indication information and the second indication information that are sent by the network device may be the same indication information.
  • the network device may directly forward the received first indication information to the network device.
  • the terminal device therefore, the information carried in the first indication information and the second indication information may be identical; or the first indication information received by the network device and the second indication information sent may also be different indication information.
  • the network device modifies or regenerates the received first indication information, but the content carried in the first indication information and the second indication information are substantially the same, and are used to indicate the same The resource location of a resource group.
  • the network controller may separately send the first indication information to the controlled multiple network devices, that is, send the multiple network devices one by one.
  • each first indication information is used to indicate a resource location of a resource group that the corresponding network device can use.
  • the network controller can respectively send the indication information #1 to the network device #1 (that is, an example of the first indication information), and send it to the network device #2.
  • Indication information #2 (ie, another example of the first indication information).
  • the resource group that the network device can use is a set of resources that the network device can use to send the PDCCH to the terminal device. After being allocated to a certain network device (for example, the above network device #1), the resource group can only be used by the network device (ie, network device #1), but cannot be used by other network devices (for example, the above network device # 2) Use. Unless the network controller re-divides the control resource set, and notifies the corresponding network device by the indication information.
  • the network device determines, according to the indication information sent by the network controller, a search space for transmitting the PDCCH (for the purpose of distinguishing and interpreting, it is recorded as the first search space).
  • the first network device may be the network device #1 or the network device #2 enumerated above, and the first resource group may be the resource group #1 allocated to the network device #1 listed above or allocated to the network device #2. Resource Group #2. This embodiment of the present invention is not limited thereto.
  • the first network device receives the indication information sent by the network controller (refer to the first indication information for convenience of distinction and description), where the first indication information is used to indicate the location of the first resource group.
  • the first indication information may directly indicate the number range of the CCEs included in the first resource group allocated by the network controller to the first network device in the control resource set, or may refer to the network device as the first
  • the network device allocates a resource (for example, may indicate an index of the rule, etc.), so that the first network device determines, according to the rule, the first resource group allocated by the network controller for itself.
  • the first network device determines the first search space according to the UE-specific search space of the terminal device and the first resource group.
  • the first network device may further determine the first search space according to the UE-specific search space of the terminal device.
  • the first search space referred to herein can be understood as the intersection of the first resource group and the UE-specific search space. That is to say, the resources of the first search space belong to the first resource group and belong to the UE-specific search space.
  • the first search space is a resource that can be used by the first network device to send the first PDCCH, that is, each network device sends the PDCCH to the terminal device only on the resource allocated to itself;
  • the first search space may be transparent or non-transparent (this is because the first resource set may be transparent or non-transparent to the terminal device, as will be described in detail later), regardless of the first search.
  • the space is transparent or non-transparent to the terminal device, and the first search space is part of the UE-specific search space. In other words, the first search space is part of the search range in which the terminal device performs blind detection.
  • a network device or a terminal device determines a PDCCH search space.
  • the search space according to the following formula
  • L, N CCE, k , M (L) have been described in detail above and will not be described herein.
  • m' m
  • Y k is 0.
  • the UE-specific search space can be associated with the identity n RNTI of the terminal device. Therefore, the UE-specific search spaces corresponding to different terminal devices may be different, but the UE-specific search spaces corresponding to different terminal devices may overlap resources in the time-frequency domain.
  • the UE-specific search space of the terminal device is designed to include a plurality of sub-spaces that are discretely distributed among the plurality of resource groups.
  • the UE-specific search space of the terminal device can be designed as any of the following:
  • Design 1 The number of CCEs included in each subspace is determined by the aggregation level.
  • FIG. 7 is a schematic diagram showing the distribution of a UE-specific search space under different aggregation levels according to an embodiment of the present invention. As shown in FIG. 7, it is assumed that the UE-specific search space of different aggregation levels still uses the number of PDCCH candidates in Table 1.
  • Design 2 The number of subspaces is determined by the number of network devices accessed by the terminal device.
  • the number of subspaces may be the same as the number of network devices accessed by the terminal device. For example, if the terminal device accesses n network devices, the number of subspaces may be n. Since the number of CCEs included in the UE-specific search space (that is, the size of the above-mentioned terminal device in a given search space (ie, M CCEs) can be calculated, that is, fixed, the CCEs included in each subspace The quantity can be M/n. In the case where M cannot be divisible by n, it can be rounded up or rounded down.
  • FIG. 8 is a schematic diagram showing another distribution of a UE-specific search space at different aggregation levels according to an embodiment of the present invention.
  • the UE-specific search space of different aggregation levels still uses the search space size in Table 1, and the number of network devices accessed by the terminal device is 2, and the number of sub-spaces is different under different aggregation levels.
  • the number of subspaces listed here is the same as the number of network devices that the terminal device accesses.
  • the number of subspaces may also be greater than the number of network devices accessed by the terminal device.
  • the UE-specific search space can be discretely distributed among multiple resource groups. That is to say, in the resource group allocated to each network device, a UE-specific search space is distributed.
  • the first network device may determine, according to the first resource group and the UE-specific search space, a resource location that the first network device can use to send the PDCCH, that is, the first search space.
  • the distribution diagram of the UE-specific search space under different aggregation levels is shown for convenience of understanding, but this does not mean that the resources of the UE-specific search space of the terminal device occupy four sub-portions.
  • the carrier in fact, at different aggregation levels, the UE-specific search space occupies resources in the same sub-carrier, but the CCEs occupied at different aggregation levels are different.
  • the occupancy of the CCEs in different aggregation levels is respectively shown, and not the resources of one subcarrier are respectively configured for the UE-specific search space in each aggregation level. Therefore, the icon is The embodiment of the invention should not be construed as being limited in any way.
  • FIG. 7 and FIG. 8 show the distribution of UE-specific search spaces when Design One and Design Two are respectively used when the number of network devices is 2 (for example, including the first network device and the second network device).
  • the first network device may be the foregoing network device #1
  • the second network device may be the network device #2
  • the resource groups corresponding to the first network device and the second network device are respectively the first resource group and the second resource.
  • the search space corresponding to the first network device and the second network device is a first search space and a second search space, respectively.
  • the dotted line shown in the figure is the first resource group at the left position, and the right position at the broken line belongs to the second resource group.
  • the first search space corresponds to the shaded area to the left of the dotted line shown in the figure
  • the second search space ie the resource position that the second network device can use
  • the above-mentioned design of the UE-specific search space is only an example, and should not be limited to the embodiment of the present invention.
  • the design method of the UE-specific search space is not particularly limited in the embodiment of the present invention, as long as the UE is dedicated.
  • the search space may be discretely distributed among multiple resource groups, and all of them should fall within the protection scope of the embodiments of the present invention.
  • calculation formula of the UE-specific search space may be used in the prior art, or may be modified on the existing technical formula, or may be a redefined calculation formula, which is not Specially limited.
  • the formula (1) above can be modified, and m' is redefined, and m' is The number of discrete values in the range, m' is the number of candidates M (L) of the PDCCH.
  • the first network device sends the first PDCCH to the terminal device in the first search space.
  • the first network device may send the first PDCCH to the terminal device on the resource.
  • the specific method for the first network device to send the first PDCCH may be the same as the prior art. For the sake of briefing, a detailed description of the specific process is omitted here.
  • S350 The terminal device blindly detects the first PDCCH on PDCCH candidates corresponding to different aggregation levels.
  • the network controller divides the control resource set, so that the resource groups allocated by different network devices do not overlap each other, but may be transparent to the terminal device, that is,
  • the terminal device does not know the resource group corresponding to each network device, but can only calculate the location of the UE-specific search space according to the calculation formula of the known search space. Therefore, the terminal device can calculate the UE-specific search space according to different aggregation levels according to the method of blind detection in the prior art, and then try to receive the first PDCCH on the UE-specific search space until the first PDCCH is received.
  • the resource group to which each network device is allocated may also be non-transparent to the terminal device.
  • the method 300 further includes:
  • the terminal device determines a plurality of resource groups from the preset control resource set, and determines a plurality of search spaces according to the UE-specific search space and the multiple resource groups.
  • the resources of any two of the plurality of resource groups do not overlap, and one search space may be determined according to each resource group and the UE-specific search space, so resources of any two search spaces do not overlap.
  • the terminal device can determine the resource group of each network device by any of the following methods:
  • the terminal device receives the plurality of resource group indication information sent by the network device, where the plurality of resource group indication information is in one-to-one correspondence with the plurality of network devices, where the resource group indication information is used to indicate the resource location of the resource group used by the network device . It has been explained in S320 that, in order to facilitate differentiation and description, in order to distinguish from the resource group indication information sent by the network controller to the network device, the resource group indication information sent by the network device to the terminal device is recorded as the second indication information.
  • the first network device sends second indication information to the terminal device, where the second indication information is used to indicate the location of the first resource group.
  • each network device may send the second indication information to the terminal device by using a radio resource control (RRC) signaling or a media access control (MAC) control element. So that the terminal device determines the location of the resource group to which each network device is assigned.
  • RRC radio resource control
  • MAC media access control
  • the terminal device may determine a search space corresponding to each network device according to the UE-specific search space and each resource group, and perform blind detection on each search space.
  • the first network device and the second network device respectively send the first PDCCH and the second PDCCH by using the corresponding resources
  • the terminal device may send the first according to the first network device and the second network device respectively.
  • the second indication information determines the location of the first resource group and the location of the second resource group.
  • the first search space and the second search space are determined according to the UE-specific search space. Therefore, the terminal device may try to receive the first PDCCH and the second PDCCH in the first search space and the second search space respectively according to different aggregation levels.
  • the terminal device performs blind detection in different manners according to its own computing capability.
  • the terminal device detects one search space at a time, that is, the terminal device may first perform blind detection in the first search space, and when detecting its own PDCCH, stop performing blind detection in the first search space; Thereafter, the terminal device can perform a blind check in the second search space, and so on.
  • the terminal device may perform blind detection in multiple search spaces at the same time.
  • the detection of the search space is stopped.
  • the terminal device may determine a plurality of resource groups from the pre-configured control resource set according to a predefined rule.
  • the plurality of resource groups are in one-to-one correspondence with a plurality of network devices.
  • the terminal device may acquire (for example, pre-configured in the terminal device) a predetermined rule and a preset control resource set in advance.
  • the terminal device may determine a resource group of each network device from the set of control resources according to the predetermined rule, and further determine a search space of each PDCCH.
  • the preset rule may be any one of the following:
  • Rule 1 According to the number of network devices accessed by the terminal device, the resources in the control resource set are evenly allocated to obtain the multiple resource groups.
  • Rule 2 Proportionally allocate resources in the control resource set according to channel qualities of the multiple channels between the terminal device and the plurality of network devices to obtain the multiple resource groups.
  • the terminal device and the network controller need to allocate resources in the control resource set according to the received power of the same reference signal. Therefore, the network controller can send the received power of the reference signal to the terminal device through each network device, so that the terminal device determines the proportion of resource allocation.
  • each network device may send the RSRP to the terminal device by using high layer signaling.
  • the specific process of determining the multiple resource groups according to the pre-defined rules is the same as the specific process of determining the multiple resource groups by the network controller in S310. For brevity, details are not described herein again.
  • the terminal device may define a search space of the PDCCH sent by each network device as one search space, and the UE-specific search space may include multiple Search spaces.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the execution order of each process should be determined by its function and internal logic, and should not be implemented in the embodiment of the present invention. Form any limit.
  • S360 may be executed before S350, before S340, or even simultaneously with S310, or before or after S310.
  • the embodiment of the present invention allocates a resource group for a plurality of network devices in a preset control resource set, and the plurality of resource groups do not overlap each other, and further determines resources for transmitting the PDCCH in each resource group. It is possible to avoid resource conflicts that may occur when multiple network devices send multiple PDCCHs to the same terminal device, thereby ensuring the reliability of DCI transmission and improving the reliability of data transmission.
  • FIG. 9 is a schematic block diagram of a network device 10 according to an embodiment of the present invention. As shown in FIG. 9, the network device 10 includes a transceiver module 11 and a determination module 12.
  • the transceiver module 11 is configured to receive resource group indication information sent by the network controller, where the resource indicated by the resource group indication information does not overlap with resources used by other network devices;
  • the determining module 12 is configured to determine, according to the user equipment UE-specific search space of the terminal device and the resource group indication information, the first search space;
  • the transceiver module 11 is further configured to send the first physical downlink control channel PDCCH to the terminal device by using the first search space.
  • the UE-specific search space of the terminal device includes multiple sub-spaces, and the multiple sub-spaces are discretely distributed in the multiple resource groups.
  • the transceiver module 11 is further configured to send resource group indication information to the terminal device, where the resource group indication information is used to indicate a resource location of the resource group used by the first network device.
  • network device 10 may correspond to a first network device in method 300 of transmitting a control channel in accordance with an embodiment of the present invention, which may include a first network for performing method 300 of transmitting a control channel in FIG. A module of the method performed by the device.
  • the modules in the network device 10 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 300 for transmitting a control channel in FIG. 3, and specifically, the transceiver module 11 is configured to execute S320 and S340 in the method 300.
  • the determining module 12 is configured to execute the S330 in the method 300.
  • the specific process in which each module performs the foregoing steps is described in detail in the method 300. For brevity, no further details are provided herein.
  • FIG. 10 is a schematic block diagram of a network controller 20 according to an embodiment of the present invention. As shown in FIG. 10, the network controller 20 includes a determining module 21 and a transceiver module 22.
  • the determining module 21 is configured to allocate, according to the number of network devices that the terminal device accesses, a plurality of resource groups, the plurality of resource groups, from the pre-configured control resource set to the plurality of network devices accessed by the terminal device.
  • the transceiver module 22 is configured to send, to the plurality of network devices, a plurality of resource group indication information, where the plurality of resource group indication information is in one-to-one correspondence with the plurality of network devices, where the resource group indication information is used to indicate that the network device is capable of using The resource location of the resource group.
  • the determining module 21 is specifically configured to determine the multiple resource groups from the pre-configured control resource set according to a preset rule and a number of network devices accessed by the terminal device.
  • the pre-set rule includes: equally allocating resources in the control resource set according to the number of network devices accessed by the terminal device, to obtain the multiple resource groups; or
  • network controller 20 may correspond to a network controller in method 300 of transmitting a control channel in accordance with an embodiment of the present invention, which may include network control for performing method 300 of transmitting a control channel in FIG.
  • the module of the method that is executed by the device.
  • the modules in the network controller 20 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 300 for transmitting a control channel in FIG. 3, and specifically, the determining module 21 is configured to execute S310 in the method 300.
  • the transceiver module 22 is configured to execute the S320 in the method 300.
  • FIG. 11 is a schematic block diagram of a terminal device 30 according to an embodiment of the present invention. As shown in FIG. 11, the terminal device 30 includes a determining module 31 and a transceiver module 32.
  • the determining module 31 is configured to determine, from a preset set of control resources, a plurality of resource groups, where resources of any two of the plurality of resource groups do not overlap;
  • the determining module 31 is further configured to determine, according to the user equipment UE-specific search space and the multiple resource groups, multiple search spaces;
  • the transceiver module 32 is configured to receive, by the plurality of network devices, a plurality of physical downlink control information PDCCHs sent by the plurality of network devices, where the plurality of network devices are in one-to-one correspondence with the plurality of PDCCHs.
  • the determining module 31 is specifically configured to determine, according to a preset rule and a number of network devices that the terminal device accesses, a plurality of resource groups from the pre-configured control resource set.
  • the pre-set rule includes: equally allocating resources in the control resource set according to the number of network devices accessed by the terminal device, to obtain the multiple resource groups; or
  • the transceiver module 32 is further configured to receive multiple resource group indication information that is sent by the multiple network devices, where the multiple resource group indication information is in one-to-one correspondence with the multiple network devices, and the resource group indication information is used for Indicate the resource location of the resource group used by the network device;
  • the determining module 31 is specifically configured to determine the multiple resource groups according to the multiple resource group indication information.
  • the UE-specific search space of the terminal device includes multiple sub-spaces, and the multiple sub-spaces are discretely distributed in the multiple resource groups.
  • the terminal device 30 may correspond to a terminal device in the method 300 of transmitting a control channel according to an embodiment of the present invention, which may include a method for performing terminal device execution of the method 300 of transmitting a control channel in FIG. Module.
  • each module in the terminal device 30 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 300 for transmitting a control channel in FIG. 3, and specifically, the determining module 31 is configured to execute S360 in the method 300, and send and receive.
  • the module 11 is configured to execute the S350 in the method 300.
  • the specific process of each module performing the foregoing steps is described in detail in the method 300. For brevity, no further details are provided herein.
  • FIG. 12 is another schematic block diagram of a network device 400 according to an embodiment of the present invention.
  • the network device 400 includes a processor 410 and a transceiver 420.
  • the network device 400 further includes a memory 430.
  • the processor 410, the transceiver 420 and the memory 430 communicate with each other through an internal connection path for transferring control and/or data signals
  • the memory 430 is for storing a computer program
  • the processor 410 is used for the memory 430.
  • the computer program is called and executed to control the transceiver 420 to send and receive signals.
  • the processor 410 When the program instructions stored in the memory 430 are executed by the processor 410, the processor 410 is configured to control the transceiver 420 to receive the first indication information sent by the network controller, where the first indication information is used to indicate that the network device 400 is usable. a resource location of the first resource group, the first resource group being determined by the network controller from a pre-configured control resource set; the processor 410 is configured to use, according to the UE-specific search space of the terminal device, the first resource group, Determining a first search space, the resource of the first search space belongs to the UE-specific search space, and belongs to the first resource group; the transceiver 420 is configured to send, by using the first search space, the first physical downlink control to the terminal device Channel PDCCH.
  • the processor 410 and the memory 430 may be combined to form a processing device, and the processor 410 is configured to execute program code stored in the memory 430 to implement the above functions.
  • the memory 430 can also be integrated in the processor 410 or independent of the processor 410.
  • the network device may further include an antenna 440, configured to send downlink data or downlink control signaling output by the transceiver 420 by using a wireless signal.
  • the network device 400 may correspond to a network device in a method 300 of transmitting a control channel according to an embodiment of the present invention, which may include a network device for performing the method 300 of transmitting a control channel in FIG. The unit of the method.
  • each unit in the network device 30 and the other operations and/or functions described above are respectively configured to implement a corresponding flow of the method 300 of transmitting a control channel in FIG.
  • the memory 430 is configured to store program code such that the processor 410 When the program code is executed, the transceiver 420 is controlled to perform S320 and S340 in the method 300 through the antenna 440, and S330 in the method 300 is executed.
  • the specific process in which each module performs the above-mentioned corresponding steps has been described in detail in the method 300, in order to Concise, no longer repeat here.
  • FIG. 13 is another schematic block diagram of a network controller 500 according to an embodiment of the present invention.
  • the network controller 500 includes a transceiver 510 and a processor 520.
  • the network controller 500 further includes a memory 530.
  • the processor 510, the transceiver 520, and the memory 530 communicate with each other through an internal connection path for transferring control and/or data signals.
  • the memory 530 is used to store a computer program, and the processor 510 is configured to be called from the memory 530.
  • the computer program is run to control the transceiver 520 to send and receive signals.
  • the processor 510 When the program instructions stored in the memory 530 are executed by the processor 510, the processor 510 is configured to determine, according to the number of network devices accessed by the terminal device, a plurality of resource groups, the multiple resources, from a preset set of control resources. The group is in a one-to-one correspondence with the multiple network devices that the terminal device accesses, and the resource group is used by the network device to send the physical downlink control channel PDCCH, and the resources of any two resource groups in the multiple resource groups do not overlap; The device 510 is further configured to control the transceiver 520 to send, to the multiple network devices, a plurality of indication information, where the indication information is used to indicate a resource location of a resource group that the network device is capable of using, the multiple indication information and the location The plurality of network devices are in one-to-one correspondence.
  • network controller 500 can correspond to a network controller in method 300 of transmitting a control channel in accordance with an embodiment of the present invention, which network controller 500 can include network control for performing method 300 of transmitting control channels in FIG.
  • the module of the method that is executed by the device.
  • each module in the network controller 500 and the other operations and/or functions described above are respectively configured to implement a corresponding process of the method 300 of transmitting a control channel in FIG. 3, specifically, the memory 530 is configured to store program code such that the processor 510, when executing the program code, executing S310 in the method 300, and controlling the transceiver 520 to execute S320 in the method 300.
  • the specific process of each module performing the foregoing steps has been described in detail in the method 300. For the sake of brevity, Let me repeat.
  • FIG. 14 is another schematic block diagram of a terminal device 600 according to an embodiment of the present invention.
  • the terminal device 600 includes a processor 601 and a transceiver 602.
  • the terminal device 600 further includes a memory 603.
  • the processor 602, the transceiver 602 and the memory 603 communicate with each other through an internal connection path for transferring control and/or data signals
  • the memory 603 is for storing a computer program
  • the processor 601 is used for the memory 603.
  • the computer program is called and executed to control the transceiver 602 to send and receive signals.
  • the processor 601 When the program instructions stored in the memory 603 are executed by the processor 601, the processor 601 is configured to determine, from the pre-configured control resource set, a plurality of resource groups, where any two resource groups of the multiple resource groups do not overlap; The processor 601 is further configured to determine, according to the user equipment UE-specific search space and the plurality of resource groups, a plurality of search spaces, where resources of each search space belong to the UE-specific search space, and belong to one resource group; the processor 601 The control transceiver 602 is further configured to receive, by the plurality of network devices, a plurality of physical downlink control information PDCCHs sent by the plurality of network devices, where the plurality of network devices are in one-to-one correspondence with the plurality of PDCCHs.
  • the above processor 601 and memory 603 can synthesize a processing device, and the processor 601 is configured to execute the program code stored in the memory 603 to implement the above functions.
  • the memory 603 may also be integrated in the processor 601 or independent of the processor 601.
  • the terminal device 600 may further include an antenna 604, configured to send uplink data or uplink control signaling output by the transceiver 602 by using a wireless signal.
  • the terminal device 600 may correspond to a terminal device in the method 300 of transmitting a control channel according to an embodiment of the present invention, and the terminal device 600 may include a method performed by the terminal device for performing the method 300 of transmitting a control channel in FIG. Module.
  • the modules in the terminal device 600 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 300 for transmitting a control channel in FIG. 3, specifically, the memory 603 is configured to store program codes, so that the processor 601 When the program code is executed, the processor 601 executes S360 in the method 300, and controls the transceiver 602 to execute S350 in the method 300.
  • the specific process in which each module performs the above-mentioned corresponding steps has been described in detail in the method 300, for the sake of brevity, This will not be repeated here.
  • the foregoing processor 601 can be used to perform the actions implemented by the terminal in the foregoing method embodiments, and the transceiver 602 can be used to perform the actions of the terminal to transmit or transmit to the network device in the foregoing method embodiments.
  • the transceiver 602 can be used to perform the actions of the terminal to transmit or transmit to the network device in the foregoing method embodiments.
  • the above processor 601 and memory 603 can be integrated into one processing device, and the processor 601 is configured to execute program code stored in the memory 603 to implement the above functions.
  • the memory 603 can also be integrated in the processor 601.
  • the terminal device 600 described above may also include a power source 605 for providing power to various devices or circuits in the terminal.
  • the terminal device 600 may further include one or more of an input unit 606, a display unit 607, an audio circuit 608, a camera 609, a sensor 510, and the like, the audio circuit.
  • an input unit 606 a display unit 607
  • an audio circuit 608 a camera 609
  • a sensor 510 a sensor
  • the terminal device 600 may further include one or more of an input unit 606, a display unit 607, an audio circuit 608, a camera 609, a sensor 510, and the like, the audio circuit.
  • a speaker 6082, a microphone 6084, and the like can also be included.
  • the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the memory in embodiments of the invention may be a volatile memory or a non-volatile memory, or may include both volatile and nonvolatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory can be a random access memory (RAM) that acts as an external cache.
  • RAM random access memory
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic randomness synchronous dynamic randomness.
  • Synchronous DRAM SDRAM
  • DDR SDRAM double data rate synchronous DRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory Take memory
  • DR RAM direct memory bus random access memory
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-described embodiments may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium.
  • the semiconductor medium can be a solid state hard drive.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

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Abstract

本申请提供了一种传输控制信道的方法、网络设备、网络控制器和终端设备，能够避免多个网络设备的PDCCH之间的资源冲突。该方法包括：第一网络设备接收网络控制器发送的资源组指示信息，该资源组指示信息指示的资源与其他网络设备所使用的资源不重叠；该第一网络设备根据用户设备UE专用搜索空间和该资源组指示信息，确定第一搜索空间；第一网络设备通过该第一搜索空间向该终端设备发送第一物理下行控制信道PDCCH。

Description

传输控制信道的方法、网络设备、网络控制器和终端设备
本申请要求于2017年5月5日提交中国专利局、申请号为201710313471.1、发明名称为“传输控制信道的方法、网络设备、网络控制器和终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及传输控制信道的方法、网络设备、网络控制器和终端设备。
背景技术
协作多点(coordination multiple point，CoMP)传输是长期演进(Long Term Evolution，LTE)中提出的一种用于解决小区间干扰问题并提升小区边缘用户吞吐量的方法。在新一代无线接入技术(new radio access technoloty，NR)中，多个网络设备可以同时为同一终端设备提供服务，并进行独立调度，且每个网络设备可以独立地向同一终端设备发送物理下行控制信道(physical downlink control channel，PDCCH)。在这种情况下，终端设备就需要盲检多个PDCCH以获得多个下行控制信息(downlink control information，DCI)。
但是，每个终端设备的用户设备(user equipment，UE)专用(UE specific)搜索空间的资源是有限的，当多个网络设备同时向同一终端设备发送多个PDCCH时，就很有可能发生资源的碰撞，即，至少两个网络设备在相同的时频资源上发送各自的PDCCH，从而造成DCI不能被正确接收，影响了网络设备与终端设备之间的数据传输，也就是影响了传输的可靠性。
因此，如何避免多个网络设备的PDCCH之间的资源冲突，保证控制信道的可靠传输，成为亟需解决的技术问题。
发明内容
本申请提供一种传输控制信道的方法、网络设备、网络控制器和终端设备，以避免多个网络设备的PDCCH之间的资源冲突。
第一方面，提供了一种传输控制信道的方法，包括：
第一网络设备接收网络控制器发送的资源组指示信息，所述资源组指示信息指示的资源与其他网络设备所使用的资源不重叠；
所述第一网络设备根据终端设备的用户设备(user equipment，UE)专用(UE-specific)搜索空间和所述资源组指示信息，确定第一搜索空间；
第一网络设备通过所述第一搜索空间向所述终端设备发送第一物理下行控制信道PDCCH。
其中，所述第一搜索空间的资源属于所述UE专用搜索空间，且属于所述第一资源组。
所述第一网络设备通过所述第一搜索空间向所述终端设备发送第一物理下行控制信道PDCCH。
当终端设备接入两个或更多个网络设备时，或者，两个或更多个终端设备的UE专用搜索空间的资源有重叠时，就有可能出现两个或更多个网络设备使用相同的时频资源发送PDCCH，即出现了资源冲突，该两个或更多个网络设备发送的PDCCH之间就有可能会产生干扰，导致终端设备不能正确地接收DCI，从而影响到对网络设备和终端设备之间的数据，影响了数据传输的可靠性。
本发明实施例通过网络控制器为第一网络设备分配能够使用的资源组，该资源组与其他网络设备(例如，第二网络设备)所使用的资源组的资源不重叠。换句话说，每个资源组的资源仅能够被所对应的网络设备所使用，使得网络设备根据各自分配得到的资源组，确定能够使用的资源，并在该资源内发送PDCCH，也就是将每个网络设备发送PDCCH使用的资源被限制在资源组的资源中，避免了资源冲突，也就是提高了PDCCH传输的可靠性，有利于提高数据传输的可靠性。
可选地，终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
具体地，每个子空间可以对应于控制资源区域中的一块时频资源，多个子空间所占用的时频资源离散地分布于多个资源组中。
可选地，每个子空间所包含的控制信道元素CCE的数量由聚合等级确定。
在这种设计中，每个子空间所包含的CCE的数量可以与聚合等级的取值相同。这种设计可以使UE专用搜索空间尽可能均匀地分布于控制资源集合中。
可选地，每个子空间所包含的CCE的数量由所述终端设备接入的网络设备的数量确定。
在这种设计中，每个子空间所包含的CCE资源可以是连续的，多个子空间可以离散地分布于控制资源集合中。
可选地，所述方法还包括：
所述第一网络设备向所述终端设备发送资源组指示信息，所述资源组指示信息用于指示所述第一网络设备所使用的资源组的资源位置。
通过向终端设备指示第一资源组的资源位置，使得终端设备可以根据该第一资源组的位置以及UE专用搜索空间，确定与第一网络设备发送的PDCCH对应的第一搜索空间。
换句话说，终端设备可以根据多个网络设备发送的第二指示信息，确定与多个网络设备对应的多个资源组的资源位置，进而分别根据多个资源组的资源位置以及UE专用搜索空间，确定与多个网络设备发送的PDCCH对应的多个搜索空间。
终端设备可以在该多个搜索空间上盲检测，其中，针对每个搜索空间，若检测到属于自己的PDCCH时，则停止检测该搜索空间。因此，有利于可以减小终端设备计算量。
第二方面，提供了一种传输控制信道的方法，包括：
网络控制器根据终端设备所接入的网络设备的数量，从预先配置的控制资源集合中为所述终端设备接入的多个网络设备分配多个资源组，所述多个资源组与所述多个网络设备一一对应，所述多个资源组中的任意两个资源组的资源不重叠；
所述网络控制器向所述多个网络设备发送多个资源组指示信息，所述多个资源组指示 信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备能够使用的资源组的资源位置。应理解，所述网络控制器可以是单独的物理设备，也可以是集成在网络设备上的一个软件和/或硬件功能模块，本发明对此并未特别限定。
本发明实施例中，网络控制器将控制资源集合预先划分为多个资源组，该多个资源组与多个网络设备一一对应，每个资源组仅能够被所对应的网络设备所使用。网络控制器将该多个资源组的资源位置的指示信息(即，资源组指示信息)分别发送给多个网络设备，以便于各网络设备根据各自分配到的资源组，确定能够使用的资源，并在该资源内发送PDCCH，也就是将每个网络设备发送PDCCH使用的资源被限制在资源组的资源中，避免了资源冲突，也就是提高了PDCCH传输的可靠性，有利于提高数据传输的可靠性。
可选地，所述网络控制器根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组，包括：
所述网络控制器基于预先设定的规则，根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定所述多个资源组。
可选地，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组。
这种划分资源的方式比较简单，网络控制器可以直接根据终端设备接入的网络设备的数量，将控制资源集合中的资源平均分配，得到多个资源组。
可选地，所述预先设定的规则包括：根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
这种划分资源的方式比较灵活，能够根据信道质量，适应性地调整分配给各网络设备的资源。
第三方面，提供了一种传输控制信道的方法，包括：
终端设备从预先配置的控制资源集合中确定多个资源组，所述多个资源组与所述终端设备接入的多个网络设备一一对应，所述多个资源组中的任意两个资源组不重叠；
所述终端设备根据用户设备UE专用搜索空间和所述多个资源组，确定多个搜索空间；
所述终端设备在所述多个搜索空间上接收多个网络设备发送的多个物理下行控制信息PDCCH，所述多个网络设备与所述多个PDCCH一一对应。
其中，每个搜索空间的资源属于一个资源组，且所述多个搜索空间的资源均属于所述UE专用搜索空间。
当终端设备接入两个或更多个网络设备时，或者，两个或更多个终端设备的UE专用搜索空间的资源有重叠时，就有可能出现两个或更多个网络设备使用相同的时频资源发送PDCCH，即出现了资源冲突，该两个或更多个网络设备发送的PDCCH之间就有可能会产生干扰，导致终端设备不能正确地接收DCI，从而影响到对网络设备和终端设备之间的数据，影响了数据传输的可靠性。
本发明实施例通过为终端设备接入的多个网络设备分配多个资源组，多个资源组与多个网络设备一一对应，每个资源组仅能够被所对应的网络设备所使用，使得网络设备根据各自分配得到的资源组，确定能够使用的资源，并在该资源内发送PDCCH，也就是将每个网络设备发送PDCCH使用的资源被限制在资源组的资源中，避免了资源冲突，也就是提高了PDCCH传输的可靠性，有利于提高数据传输的可靠性。
可选地，所述终端设备从预先配置的控制资源集合中确定多个资源组，包括：
所述终端设备根据预先定义的规则，从预先配置的控制资源集合中确定多个资源组。
可选地，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组。
可选地，所述预先设定的规则包括：根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
这种划分资源的方式比较灵活，能够根据信道质量，适应性地调整分配给各网络设备的资源。
可选地，所述终端设备从预先配置的控制资源集合中确定多个资源组，包括：
所述终端设备接收所述多个网络设备发送的多个资源组指示信息，所述多个资源组指示信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备所使用的资源组的资源位置。终端设备可以根据多个网络设备发送的第二指示信息，确定与多个网络设备对应的多个资源组的资源位置，进而分别根据多个资源组的资源位置以及UE专用搜索空间，确定与多个网络设备发送的PDCCH对应的多个搜索空间。
终端设备可以在该多个搜索空间上盲检测，其中，针对每个搜索空间，若检测到属于自己的PDCCH时，则停止检测该搜索空间。因此，有利于可以减小终端设备计算量。
可选地，所述终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
具体地，每个子空间可以对应于控制资源区域中的一块时频资源，多个子空间所占用的时频资源离散地分布于多个资源组中。
可选地，每个子空间所包含的控制信道元素CCE的数量由聚合等级确定。
在这种设计中，每个子空间所包含的CCE的数量可以与聚合等级的取值相同。这种设计可以使UE专用搜索空间尽可能均匀地分布于控制资源集合中。
可选地，每个子空间所包含的CCE的数量由所述终端设备接入的网络设备的数量确定。
在这种设计中，每个子空间所包含的CCE资源可以是连续的，多个子空间可以离散地分布于控制资源集合中。
第四方面，提供了一种网络设备，所述网络设备包括用于执行第一方面或第一方面任一种可能实现方式中的传输控制信道的方法的各个模块。
第五方面，提供了一种网络控制器，所述网络控制器包括用于执行第二方面或第二方面任一种可能实现方式中的传输控制信道的方法的各个模块。
第六方面，提供了一种终端设备，所述终端设备包括用于执行第三方面或第三方面任一种可能实现方式中的传输控制信道的方法的各个模块。
第七方面，提供了一种网络设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行第一方面或第一方面任一种可能实现方式中的方法。
第八方面，提供了一种网络控制器，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行第二方面或第二方面任一种可能实现方式中的方法。
第九方面，提供了一种终端设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行第三方面或第三方面任一种可能实现方式中的方法。
第十方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被网络设备运行时，使得所述网络设备执行上述第一方面或第一方面任一种可能实现方式中的方法。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被网络控制器运行时，使得所述网络控制器执行上述第二方面或第二方面任一种可能实现方式中的方法。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被终端设备运行时，使得所述终端设备执行上述第三方面或第三方面任一种可能实现方式中的方法。
第十三方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，所述程序代码包括用于执行第一方面至第三方面或第一方面至第三方面任一种可能实现方式中的方法的指令。
第十四方面，提供了一种处理装置，包括处理器和接口。该处理器用于用于执行上述第一方面至第三方面或第一方面至第三方面中任一种可能实现方式中的方法，其中，相关的数据交互(例如进行或者接收数据传输)是通过上述接口来完成的。在具体实现过程中，上述接口可以进一步通过收发器来完成上述数据交互过程。
应理解，上述第十四方面中的处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
本申请通过为多个网络设备分配多个彼此之间资源互不重叠的资源组，使各网络设备用于发送PDCCH的资源不重叠，避免了资源冲突，提高了PDCCH传输的可靠性。
附图说明
图1是适用于本发明实施例的传输控制信道的方法的通信系统的示意图。
图2示出了当前协议中规定的不同聚合等级下PDCCH候选位置的分布示意图。
图3是根据本发明实施例的传输控制信道的方法的示意性流程图。
图4示出了本发明实施例提供的根据预先设定的规则分配资源组的示意图。
图5示出了本发明实施例提供的根据预先设定的规则分配资源组的另一示意图。
图6示出了本发明实施例提供的根据预先设定的规则分配资源组的又一示意图。
图7示出了本发明实施例提供的不同聚合等级下UE专用搜索空间的分布示意图。
图8示出了本发明实施例提供的不同聚合等级下UE专用搜索空间的另一分布示意图。
图9是本发明实施例提供的网络设备的示意性框图。
图10是本发明实施例提供的网络控制器的示意性框图。
图11是本发明实施例提供的终端设备的示意性框图。
图12是本发明实施例提供的网络设备的另一示意性框图。
图13是本发明实施例提供的网络控制器的另一示意性框图。
图14是本发明实施例提供的终端设备的另一示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请的技术方案可以应用于各种通信系统，例如：全球移动通信(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(LTE)系统、先进的长期演进(LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)或下一代通信系统(例如，第五代通信(fifth-generation，5G)系统)等。其中，5G系统也可以称为新一代无线接入技术(new radio access technology，NR)系统。
为便于理解本发明实施例，首先结合图1详细说明适用于本发明实施例的通信系统。
图1是适用于本发明实施例的传输控制信道的方法的通信系统100的示意图。如图1所示，该通信系统100包括：网络控制器110、至少一个网络设备(例如，图中所示出的网络设备#A 121和第二网络设备#B 122)和至少一个终端设备(例如，图中所示出的终端设备#A 131和终端设备#B 132)。
其中，网络设备(例如，网络设备#A 121或网络设备#B 122)可以是全球移动通信(GSM)系统或码分多址(CDMA)系统中的基站(base transceiver station，BTS)，也可以是宽带码分多址(WCDMA)中的基站(NodeB，NB)，还可以是长期演进(LTE)中的演进型基站(evolutional node B，eNB或eNodeB)，或者中继站、接入点或射频拉远单元(remote radio unit，RRU)，或者车载设备、可穿戴设备以及未来5G系统中的网络侧设备，如传输点(transmission point，TP)、发送接收点(transmission reception point，TRP)、基站、小基站设备等，本发明实施例对此并未特别限定。
终端设备(例如，终端设备#A131或终端设备#B 132)可以是移动的或者固定的。终端设备可以通过无线接入网(radio access network，RAN)与一个或多个核心网(core network)进行通信。终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备可以是无线局域网(wireless local area networks，WLAN)中的站点(station，ST)，可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及下一代通信系统，例如，5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等，本发明实施例对此并未特别限定。
该通信系统100可以支持CoMP传输，即，多个小区或多个传输点可以协作以在同一时频资源上向同一个终端设备发送数据或者在部分重叠的时频资源上向同一个终端设备发送数据。其中，该多个小区可以属于相同的网络设备或者不同的网络设备，并且可以根 据信道增益或路径损耗、接收信号强度、接收信号指令等来选择。
该通信系统100中的终端设备(例如，终端设备#A131)可以支持多点传输，即，该终端设备#A131可以与网络设备#A 121通信，也可以与网络设备#B 122通信，其中，网络设备#A 121可以作为服务网络设备，服务网络设备是指该通过无线空口协议为终端设备提供RRC连接、非接入层(Non-access Stratum，NAS)移动性管理和安全性输入等服务的网络设备。
可选地，该网络设备#A 121可以为服务网络设备，该网络设备#B 122可以为协作网络设备；或者，网络设备#A 121可以为协作网络设备，网络设备#B 122为服务网络设备。
在本发明实施例中，该网络设备#A 121和网络设备#B 122可以由网络控制器110控制和/或调度。网络控制器110可以根据从各网络设备获得和维护的信息对所控制的多个网络设备(包括上述网络设备#A 121和网络设备#B 122)进行统一的资源调度和管理。例如，向所控制的多个网络设备发送控制消息和/或指示信息等。
应理解，网络控制器110可以是单独的物理设备(如图1所示)，也可以是集成在网络设备上的一个软件和/或硬件功能模块，本发明对此并未特别限定。
在NR中，将终端设备(例如，可以为终端设备#A131)首次接入的网络设备(例如，可以为网络设备#A 121)称为服务网络设备，终端设备#A 131在开机后可以通过小区搜索选择一个合适或可接纳的小区后，然后通过附着流程完成与网络侧的连接。终端设备#A131在完成附着流程后，便可以与该网络设备#A 121进行数据通信。
在该终端设备#A 131与网络设备#A 121数据通信的过程中，还可以接入其他网络设备(例如，网络设备#B 122)，该网络设备#B 122可以监听到该终端设备#A 131与网络之间有数据交互，从而推断该终端设备#A 131的服务网络设备不是自身，因此，可以确定自身为该终端设备#A 131的协作网络设备。
该通信系统100中的终端设备(例如，终端设备#B 132)也可以支持单点传输，即，该终端设备#B 132可以仅与网络设备#A 121通信。
应理解，图1仅为便于理解而示例的简化示意图，该通信系统100中还可以包括其他网络设备和/或终端设备，并且，同一终端设备还可以与更多的网络设备进行CoMP传输，图1中未予以画出。
在本发明实施例中，在CoMP场景中，服务网络设备和协作网络设备都可以向终端设备发送控制信令和数据。例如，该服务网络设备和该协作网络设备可以同时向终端设备发送控制信令；或者，该服务网络设备和该协作网络设备可以同时向该终端设备发送数据，或者，该服务网络设备和该协作网络设备可以同时向终端设备发送控制信令。
在网络设备和终端设备进行数据传输之前，终端设备需要在PDCCH上接收(或者说，盲检测)下行控制信息(downlink control Information，DCI)，以根据DCI的指示，在物理下行共享信道(physical downlink share channel，PDSCH)上接收下行数据。
然而，在CoMP场景中，多个网络设备均可以向同一终端设备发送PDCCH，并且，对于一个特定的终端设备而言，UE专用搜索空间(UE-specific search space)占用的资源是可以确定的。多个网络设备在该UE专用搜索空间内发送多个PDCCH时就很有可能出现资源冲突。因此，当多个网络设备在UE专用搜索空间内发送多个PDCCH时，一旦出现资源冲突，即，两个或更多个网络设备使用相同的时频资源发送PDCCH，则该两个或 多个网络设备发送的PDCCH之间就可能会产生干扰，导致终端设备不能正确地接收DCI，从而影响到网络设备和终端设备之间的数据传输，影响了数据传输的可靠性。
有鉴于此，本申请提供一种传输控制信道的方法，能够避免多个网络设备的PDCCH之间的资源冲突，以保证控制信道的可靠传输。
为便于理解本发明实施例，首先简单介绍本发明实施例涉及的几个术语。
1)控制信道：
本申请中涉及的控制信道可以用于承载资源调度信息和其他控制信息，例如该控制信道可以是PDCCH、增强物理下行控制信道(enhanced physical downlink control channel，EPDCCH)、新空口物理下行控制信道(new radio physical downlink control channel，NR-PDCCH)以及随着网络演变而定义的具有上述功能的其他下行信道，或者也可以为上行控制信道，比如物理上行控制信道(physical uplink control channel，PUCCH)等等。下文中为方便说明，仅以PDCCH为例详细说明本发明实施例的传输控制信道的方法。应理解，信道也可以叫做信号或者其余名称，本发明实施例对此并未特别限定。
2)控制信道元素(control channel element，CCE)、资源元素组(resource element group，REG)与聚合等级(aggregation level，AL)：
REG可以理解为下行控制信令进行物理资源分配的基本单位，用于定义下行控制信令到资源粒子(resource element，RE)的映射。目前的协议(例如，LTE协议)中规定一个CCE由9个REG组成，一个REG由4个频域上连续的非参考信号(reference signal，RS)的资源粒子(resource element，RE)组成，即，一个CCE由36个RE组成。
一个PDCCH可以在L个连续的CCE上传输，每个CCE由9个REG组成。其中，L为聚合等级，表示该搜索空间所包含的CCE的数量。例如，L可以取值为1、2、4、8，甚至还可以为16、32，本发明实施例对聚合等级的取值并未特别限定。
3)搜索空间(search space)：
作为终端设备盲检测的搜索范围，目前的协议(例如，LTE协议)中定义了搜索空间的概念。搜索空间可以包括：公共搜索空间(common search space)和UE专用搜索空间(UE-specific search space)。公共搜索空间用于传输小区级别的公共信息，例如可以包括：与寻呼(paging)、随机接入响应(random access response，RAR)、广播控制信道(broadcast control channel，BCCH)等相关的控制信息；UE专用搜索空间用于传输终端设备(或者说，UE)级别的信息，例如可以包括：下行共享信道(downlink share channel，DL-SCH)、上行共享信道(unlink share channel，UL-SCH)等相关的控制信息。
应理解，公共搜索空间和UE专用搜索空间是LTE协议中定义的两类搜索空间，本发明实施例中以UE专用搜索空间为例来说明，但这不应对本发明构成任何限定，本申请并不排除对搜索空间的重新划分或者重新定义的可能，只要是用于传输终端设备级别的信息的资源，均可以定义为本发明实施例中所述的UE专用搜索空间。
一个搜索空间是对某一CCE聚合等级定义的。一个终端设备可以有多个搜索空间，每个搜索空间中的CCEs可以是连续分布的，终端设备需监听一组PDCCH控制信道，这一组被监听的PDCCH控制信道可以称为“控制信道候选集(candidate control channel set)”，或者称“控制信道候选(PDCCH candidates)”。
表一示出了聚合等级L、可用的CCE个数(或者称，搜索空间大小)N CCE,k和给定的 搜索空间内需要监听的PDCCH candidate数目M (L)的对应关系：
表一
Figure PCTCN2018085414-appb-000001
可以看到，在不同的聚合等级下，搜索空间的大小不同，PDCCH候选数目也不同。并且，搜索空间的大小M＝M (L)·L，或者说，搜索空间所包含的CCE的数目为聚合等级与PDCCH候选数目的乘积。
应理解，表一仅为便于理解，结合LTE协议中定义的聚合等级L、搜索空间大小N CCE,k和给定的搜索空间内需要监听的PDCCH candidate数目M (L)说明了各参数之间的对应关系，但这不应对本发明实施例构成任何限定，本申请也并不排除在未来协议中对聚合等级L、搜索空间大小N CCE,k和给定的搜索空间内需要监听的PDCCH candidate数目M (L)之间的对应关系重新定义的可能，同时也不排除定义更多参数的可能。
图2示出了当前协议中规定的不同聚合等级下UE专用搜索空间的分布示意图。如图2所示，在AL＝1时，每个搜索空间的大小为1个CCE，PDCCH候选数目为6，该搜索空间的大小为6个CCEs，该6个CCEs连续分布于时频资源中；在AL＝2时，每个搜索空间的大小为2个CCEs，PDCCH候选数目为6，该搜索空间的大小为12个CCEs；以此类推，为了简洁，这里不再一一列举。
需要说明的是，图中示出的在同一聚合等级下的搜索空间对应不同的阴影区域，每种阴影表示PDCCH的一个候选位置。为了简洁，后文中省略对相同或相似情况的说明。
4)控制资源集合(control resource set)：
控制信道可以划分为多个控制资源集合，每个控制资源集合是一组REG的集合。终端设备可以在一个或多个控制资源集合上监听PDCCH。
在本发明实施例中，对于网络设备而言，控制资源集合可以理解为发送控制信道所占的资源；对于终端设备而言，每个终端设备的PDCCH的搜索空间都属于该控制资源集合。或者说，网络设备可以从该控制资源集合中确定发送PDCCH使用的资源，终端设备可以从该控制资源集合中确定PDCCH的搜索空间。其中，控制资源集合可以包括时频资源，例如，频域上可以是一段带宽，或者一个或者多个子带等；时域上可以是时间单元的个数，例如，子帧或者时隙或者微时隙中的符号个数；时频域上可以是连续或不连续的资源单元，例如，连续的资源块(resource block，RB)或者不连续的RB。
应理解，上述列举的频域资源、时域资源、时频域资源的具体内容仅为示例性说明，而不应对本发明实施例构成任何限定。例如，RB的定义可以为现有LTE协议中定义的资源，也可以为未来协议中定义的资源，或者，还可以使用其他的命名来替代。又例如，时 间单元，可以是子帧，也可以是时隙(slot)，还可以是无线帧、微时隙(mini slot或sub slot)、多个聚合的时隙、多个聚合的子帧、符号等等，甚至还可以是传输时间间隔(transmission time interval，TTI)，本申请实施例对此并未特别限定。
下面将结合附图详细说明本发明实施例。
图3从设备交互的角度示出了根据本发明实施例的传输控制信道的方法300的示意性流程图。应理解，该方法300可以应用于无线通信系统，该通信系统可以包括网络控制器、网络设备和终端设备，多个网络设备可以通过CoMP的方式与终端设备传输数据。例如，该通信系统可以为图1中示出的通信系统100。该网络控制器可以为图1中的网络控制器110，该多个网络设备可以包括与同一终端设备传输数据的网络设备#1和网络设备#2，该网络设备#1可以为图1中的网络设备#A 110，该网络设备#2可以为图1中的网络设备#B120，或者，该网络设备#1可以为图1中的网络设备#B 122，该网络设备#2可以为图1中的第一网络设备#A 121，该终端设备可以为图1中的第一终端设备#A 131。
如图3所示，该方法300包括：
S310，网络控制器根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组。
具体地，网络控制器可以获知通信系统中各网络设备与终端设备的连接关系，因此网络控制器可以确定每个终端设备所接入的网络设备的数量。在本发明实施例中，该网络控制器可以根据终端设备所接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组。该多个资源组与终端设备所接入的多个网络设备具有一一对应关系。例如，该终端设备接入了网络设备#1和网络设备#2，则该网络控制器将该控制资源集合划分为两个资源组，例如可以分别记作资源组#1和资源组#2，其中，资源组#1仅能够被网络设备#1使用，资源组#2仅能够被网络设备#2使用。
可选地，该网络控制器可以基于预先设定的规则，根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定该多个资源组。
具体地，该预先设定的规则可以为以下任意一种：
规则一：根据该终端设备接入的网络设备的数量，平均分配该控制资源集合中的资源，以得到该多个资源组。
假设控制资源集合所包含的CCE的数量为N，当网络设备的数量为n时，网络控制器为每个网络设备分配的资源所占用的CCE的数量为N/n。若N不能被n整除，则可以对N/n向上取整或向下取整。即，每个网络设备被分配到的资源组中包含的CCE的数目
Figure PCTCN2018085414-appb-000002
或者，
Figure PCTCN2018085414-appb-000003
可选地，每个网络设备的资源组中的CCE是连续的。例如，对应于网络设备#1的资源组#1所包含的CCE在N个CCE中的编号范围为[1，K]，对应于网络设备#2的资源组#2所包含的CCE在N个CCE中的编号范围为[K+1,2K]，对应于再一个网络设备(例如记作网络设备#3)的资源组(例如记作资源组#3)所包含的CCE在N个CCE中的编号范围为[2K+1,3K]，以此类推，这里不再一一列举。
应理解，上述列举的资源组中CCE的编号仅为示例性说明，不应对本发明实施例构成任何限定。例如，该N个CCE的编号可以从任意正整数开始依次累加。
图4示出了本发明实施例提供的根据预先设定的规则分配资源组的示意图。如图4所 示，假设该控制资源集合中的资源在一个子载波上，并且占用了连续的32个CCE，网络设备的数量为2，则该控制资源集合可以被平均分为2个资源组，每个资源组包括16个CCE。资源组#1所包含的CCE在N个CCE中的编号范围为[1,16]，资源组#2所包含的CCE在N个CCE中的编号范围为[17,32]。
应理解，上述列举的网络控制器为每个网络设备分配的资源组所占的CCE的具体方式仅为示例性说明，而不应对本发明实施例构成任何限定。
还应理解，上述列举的通过CCE编号指示资源组的方法仅为一种可能的实现方式，当资源组中的CCE为连续的多个CCE时，还可以通过CCE的起始地址和CCE数量、CCE的起始地址和结束地址、或者CCE的结束地址和CCE数量中的任意一种方式来指示。
例如，每个网络设备的资源组中的CCE也可以是非连续的。图5示出了本发明实施例提供的根据预先设定的规则分配资源组的另一示意图。如图5所示，假设该控制资源集合中的资源在一个子载波上，并且占用了连续的32个CCE，网络设备数量为2，则该控制资源集合可以被平均分为2个资源组(例如包括资源组#1和资源组#2)，每个资源组包括16个CCE。资源组#1所包含的CCE在N个CCE中的编号范围为[1,3,…,31]，资源组#2所包含的CCE在N个CCE中的编号范围为[2,4,…,32]。
规则二：根据该终端设备与该多个网络设备之间的多个信道的信道质量，按比例分配该控制资源集合中的资源，以得到该多个资源组。
可以理解，当网络设备与终端设备之间的信道质量较好时，PDCCH所用的聚合等级可以相对较低，例如，聚合等级可以为1、2；相反，当网络设备与终端设备之间的信道质量较差时，PDCCH所用的聚合等级可以相对较高，例如，聚合等级可以为4、8，甚至可以为更高的值。与此相对应地，在聚合等级较低时，可以给对应较低聚合等级的网络设备分配较少的资源；在聚合等级较高时，可以给对应较高聚合等级的网络设备分配较多的资源。
可选地，终端设备与网络设备之间的信道质量根据参考信号接收功率(reference signal receiving power，RSRP)。可选地，RSRP可以为上行参考信号的接收功率。例如，该上行参考信号可以为探测参考信号(sounding reference signal，SRS)。
假设控制资源集合所包含的CCE的数量为N，当网络设备的数量为2(例如包括网络设备#1和网络设备#2)时，网络设备#1和网络设备#2接收同一个SRS的接收功率的比值为u:v，则网络控制器为网络设备#1分配的资源所占用的CCE的数量为
Figure PCTCN2018085414-appb-000004
网络控制器为网络设备#2分配的资源所占用的CCE是数量为
Figure PCTCN2018085414-appb-000005
若N不能被(u+v)整除，则可以对N/(u+v)向上取整或向下取整。
图6示出了本发明实施例提供的根据预先设定的规则分配资源组的又一示意图。如图6所示，假设该控制资源集合中的资源在一个子载波上，并且占用了连续的32个CCE，网络设备的数量为2(例如包括网络设备#1和网络设备#2)，其中，网络设备#1和网络设备#2分别可以根据接收到的SRS的接收功率的比例，确定资源的分配比例。例如，网络设备#1和网络设备#2接收SRS的接收功率比为1:2，则可以将分配给网络设备#1和网 络设备#2的资源比例(也就是资源组#2和资源组#1的资源比例)确定为2:1。
可选地，每个网络设备的资源组中的CCE是连续的或非连续的。
综上可以看到，不论网络设备的资源组中的CCE是连续或者非连续，任意一个CCE在分配给一个网络设备之后，便不能被其他网络设备所使用的，也就是说，分配给多个网络设备的多个资源组中，任意两个网络设备的资源组的资源不重叠。
S320，该网络控制器向多个网络设备发送多个资源组指示信息，该资源组指示信息用于指示网络设备能够使用的资源组的资源位置。
在本发明实施例中，为了便于区分和说明，将网络控制器向网络设备发送的资源组指示信息记作第一指示信息，将后文中提及的网络设备向终端设备发送的资源组指示信息记作第二指示信息。
应理解，对同一个网络设备而言，网络设备接收到的第一指示信息和发送的第二指示信息可以为相同的指示信息，例如，网络设备可以直接将接收到的第一指示信息转发给终端设备，因此，第一指示信息和第二指示信息中携带的信息可以是完全相同的；或者，网络设备接收到的第一指示信息和发送的第二指示信息也可以为不同的指示信息，例如，网络设备对接收到的第一指示信息作了修改或重新生成了第二指示信息，但，第一指示信息和第二指示信息中携带的内容实质上是相同的，均用于指示同一个资源组的资源位置。
具体地，该网络控制器在为每个网络设备确定了能够使用的资源组之后，便可以向所控制的多个网络设备分别发送第一指示信息，即，发送与该多个网络设备一一对应的多个第一指示信息，每个第一指示信息用于指示所对应的网络设备能够使用的资源组的资源位置。以网络设备#1和网络设备#2这两个网络设备为例，网络控制器可以分别向网络设备#1发送指示信息#1(即，第一指示信息的一例)，向网络设备#2发送指示信息#2(即，第一指示信息的又一例)。
这里，需要说明的是，网络设备能够使用的资源组也就是网络设备能够用于向终端设备发送PDCCH的资源的集合。该资源组在分配给某一网络设备(例如，上述网络设备#1)后，仅能够被该网络设备(即，网络设备#1)使用，而不能被其他网络设备(例如，上述网络设备#2)使用。除非网络控制器对该控制资源集合进行了重新划分，并通过指示信息通知给相应的网络设备。
以下，不失一般性，以第一网络设备为例，详细说明网络设备根据网络控制器发送的指示信息确定用于发送PDCCH的搜索空间(为便于区分和说明，记作第一搜索空间)的具体过程。可以理解，该第一网络设备可以为上述列举的网络设备#1或者网络设备#2，第一资源组可以为上述列举的分配给网络设备#1的资源组#1或者分配给网络设备#2的资源组#2。本发明实施例对此并不限定。
在S320中，该第一网络设备接收该网络控制器发送的指示信息(为便于区分和说明，记作第一指示信息)，该第一指示信息用于指示第一资源组的位置。
具体地，该第一指示信息可以直接指示网络控制器分配给该第一网络设备的第一资源组所包含的CCE在控制资源集合中的编号范围，或者，也可以指该网络设备为第一网络设备分配资源的规则(例如，可以指示该规则的索引等)，以便该第一网络设备根据该规则，确定网络控制器为自身分配的第一资源组。
S330，该第一网络设备根据终端设备的UE专用搜索空间和第一资源组，确定第一搜 索空间。
该第一网络设备在确定了第一资源组之后，便可以进一步根据终端设备的UE专用搜索空间，确定第一搜索空间。
这里所说的第一搜索空间可以理解为第一资源组与UE专用搜索空间的交集。也就是说，该第一搜索空间的资源属于第一资源组，且属于UE专用搜索空间。对于网络设备而言，该第一搜索空间为能够被该第一网络设备使用以发送第一PDCCH的资源，也就是说，每个网络设备仅在分配给自身的资源上向终端设备发送PDCCH；对于终端设备来说，该第一搜索空间可以是透明或者非透明的(这是因为第一资源集对于终端设备来说可以是透明或者非透明的，后文中会详细说明)，不论第一搜索空间对终端设备透明或者非透明，该第一搜索空间是UE专用搜索空间的一部分，换句话说，该第一搜索空间是终端设备进行盲检的搜索范围的一部分。
通过上文中S310中的描述可知，任意两个网络设备的资源组的资源是不重叠的，在任意两个资源组中确定与UE专用搜索空间的交集必然也是不重叠的，也就是说，第一网络设备对应的第一搜索空间和第二网络设备对应的第二搜索空间之间是不重叠的。由此，可以避免多个网络设备同时向终端设备发送多个PDCCH是可能产生的资源冲突问题。
在当前的LTE协议中，网络设备或终端设备在确定PDCCH搜索空间
Figure PCTCN2018085414-appb-000006
时，可以按照以下公式确定出该搜索空间
Figure PCTCN2018085414-appb-000007
Figure PCTCN2018085414-appb-000008
其中，i＝0,…,L－1，且m＝0,…,M (L)－1。L、N CCE,k、M (L)的定义在上文中已经详细说明，在此不再赘述。对于公共搜索空间，m'＝m，Y k为0。对于用户搜索空间，Y k定义为：Y k＝(A·Y k-1)mod D，其中，Y -1＝n RNTI≠0，A＝39827，D＝65537，
Figure PCTCN2018085414-appb-000009
n s为一个无线帧中的时隙(slot)编号(取值范围可以为0～19)。
可以看到，UE专用搜索空间可以与终端设备的标识n RNTI相关。因此，不同的终端设备对应的UE专用搜索空间可能是不同的，但不同的终端设备对应的UE专用搜索空间有可能在时频域上资源重叠。
但是每个CCE在被一个终端设备或者网络设备占用之后，其他终端设备或者网络设备就不能再使用该CCE资源。因此，在本发明实施例中，将终端设备的UE专用搜索空间设计为包括多个子空间，该多个子空间离散地分布于多个资源组中。
具体地，终端设备的UE专用搜索空间可以设计为以下任意一种：
设计一：每个子空间所包含的CCE的数量由聚合等级确定。
在设计一中，每个子空间所包含的CCE的数量可以与聚合等级的取值相同。例如，AL＝1，每个子空间所包含的CCE的数量为1，此情况下，子空间的数量与PDCCH候选数目相同。
图7示出了本发明实施例提供的不同聚合等级下UE专用搜索空间的分布示意图。如图7所示，假设不同聚合等级下UE专用搜索空间仍沿用表一中的PDCCH候选数目，在AL＝1时，每个子空间包含1个CCE，子空间的数量为6；在AL＝2时，每个子空间包含2 个CCE，子空间的数量为6；在AL＝4时，每个子空间包含4个CCE，子空间的数量为2；在AL＝8时，每个子空间包含8个CCE，子空间的数量为2。
设计二：子空间的数量由终端设备接入的网络设备的数量确定。
在设计二中，子空间的数量可以与终端设备接入的网络设备的数量相同。例如，该终端设备接入了n个网络设备，则子空间的数量可以为n。由于UE专用搜索空间所包含的CCE的数量(也就是上述终端设备在给定的搜索空间的大小(即M个CCE))可以计算得到，也就是固定的，则每个子空间所包含的CCE的数量可以为M/n。在M不能被n整除的情况下，可以向上取整或者向下取整。
图8示出了本发明实施例提供的不同聚合等级下UE专用搜索空间的另一分布示意图。如图8所示，假设不同聚合等级下UE专用搜索空间仍沿用表一中的搜索空间大小，终端设备接入的网络设备的数目为2，则在不同的聚合等级下，子空间的数量均可以为2。在AL＝1时，每个子空间包含3个CCE；在AL＝2时，每个子空间包含6个CCE；在AL＝4时，每个子空间包含4个CCE；在AL＝8时，每个子空间包含8个CCE。
应理解，这里所列举的子空间的数量与终端设备接入的网络设备的数量相同仅为一种可能的实现方式，例如，子空间的数量还可以大于终端设备接入的网络设备的数量。
综上可以看到，采用上述设计，可以使UE专用搜索空间离散地分布于多个资源组中。也就是说，在分配给每个网络设备的资源组中，均分布有UE专用搜索空间。该第一网络设备可以根据第一资源组和UE专用搜索空间，确定第一网络设备发送PDCCH所能够使用的资源位置，即，第一搜索空间。
需要说明的是，图7和图8中仅为便于理解而示出了不同聚合等级下UE专用搜索空间的分布示意图，但这并不代表该终端设备的UE专用搜索空间的资源占用了四个子载波，事实上，在不同的聚合等级下，UE专用搜索空间均占用的是同一个子载波中的资源，只是在不同的聚合等级下占用的CCE不同。图中为便于区分和理解，将不同聚合等级下的CCE的占用情况分别示出，而并不是为每个聚合等级下的UE专用搜索空间分别配置了一个子载波的资源，因此，该图示不应对本发明实施例构成任何限定。
再看图7和图8，图7和图8示出了网络设备数量为2(例如包括第一网络设备和第二网络设备)时分别采用设计一和设计二时的UE专用搜索空间的分布图。其中，第一网络设备可以为上述网络设备#1，第二网络设备可以为上述网络设备#2，与第一网络设备和第二网络设备对应的资源组分别为第一资源组和第二资源组，与第一网络设备和第二网络设备对应的搜索空间分别为第一搜索空间和第二搜索空间。图中示出的虚线以左的位置第一资源组，虚线以右的位置属于第二资源组。则第一搜索空间即对应于图中示出的虚线以左的阴影区域，第二搜索空间(即第二网络设备所能够使用的资源位置)即对应于图中示出的虚线以右的阴影区域。
需要说明的是，上述列举的对UE专用搜索空间的设计仅为示例，而不应对本发明实施例构成任何限定，本发明实施例对于UE专用搜索空间的设计方法并未特别限定，只要UE专用搜索空间可以离散地分布于多个资源组中，均应落入本发明实施例的保护范围内。
还需要说明的是，UE专用搜索空间的计算公式可以沿用现有技术，也可以在现有的技术公式上进行修改，或者，也可以为重新定义的计算公式，本发明实施例对此并未特别限定。例如，可以对上文中的公式(1)进行修改，将其中的m'重新定义，将m'在
Figure PCTCN2018085414-appb-000010
范围内离散取值，m'的数量为PDCCH的候选数目M (L)。
S340，该第一网络设备在该第一搜索空间向该终端设备发送第一PDCCH。
该第一网络设备在确定第一搜索空间之后，便可以在该资源上向终端设备发送第一PDCCH。第一网络设备发送第一PDCCH的具体方法可以与现有技术相同，为了简介，这里省略对该具体过程的详细说明。
S350，该终端设备在不同的聚合等级对应的PDCCH候选上盲检该第一PDCCH。
在本发明实施例中，网络控制器虽然对控制资源集合进行了划分，使得不同的网络设备分配到的资源组之间彼此不重叠，但对于终端设备而言可以是透明的，也就是说，终端设备不知道各网络设备对应的资源组，而仅能根据已知的搜索空间的计算公式计算得到UE专用搜索空间的位置。因此，终端设备可以沿用现有技术中的盲检的方法，根据不同的聚合等级计算得到UE专用搜索空间，然后在该UE专用搜索空间上尝试接收第一PDCCH，直到接收到该第一PDCCH。
可选地，各网络设备分配到的资源组对于终端设备也可以是非透明的。
可选地，在S350之前，该方法300还包括：
S360，该终端设备从预先配置的控制资源集合中确定多个资源组，并根据UE专用搜索空间和所述多个资源组，确定多个搜索空间。
其中，上述多个资源组中的任意两个资源组的资源不重叠，根据每个资源组和UE专用搜索空间可以确定一个搜索空间，因此任意两个搜索空间的资源也不重叠。
终端设备可以通过以下任意一种方式来确定各网络设备的资源组：
方式一：
终端设备接收多个网络设备发送的多个资源组指示信息，该多个资源组指示信息与多个网络设备一一对应，该资源组指示信息用于指示网络设备所使用的资源组的资源位置。在S320中已经说明，为了便于区分和说明，为了与网络控制器向网络设备发送的资源组指示信息区分，将网络设备发送给终端设备的资源组指示信息记作第二指示信息。
例如，该第一网络设备向终端设备发送第二指示信息，该第二指示信息用于指示第一资源组的位置。
可选地，各网络设备可以通过无线资源控制(radio resource control，RRC)信令或者媒体接入控制(media access control，MAC)控制元素(control element)等信令向终端设备发送第二指示信息，以便于该终端设备确定各网络设备分配到的资源组的位置。
终端设备在根据第二指示信息确定了各资源组的位置之后，便可以根据UE专用搜索空间和各资源组，确定与各网络设备对应的搜索空间，并在各搜索空间上进行盲检测。
在本发明实施例中，第一网络设备和第二网络设备分别使用各自所对应的资源发送第一PDCCH和第二PDCCH，该终端设备可以根据第一网络设备和第二网络设备分别发送的第二指示信息，确定第一资源组的位置和第二资源组的位置。进而根据UE专用搜索空间，确定第一搜索空间和第二搜索空间。由此，该终端设备可以根据不同的聚合等级，依次或者同时在第一搜索空间和第二搜索空间分别尝试接收第一PDCCH和第二PDCCH。
可选地，终端设备根据自身的计算能力进行不同方式的盲检。当终端设备计算能力较弱时，终端设备一次检测一个搜索空间，即终端设备可以首先在第一搜索空间进行盲检，当检测到自己的PDCCH时，则停止在第一搜索空间进行盲检；其后，终端设备可以在第 二搜索空间进行盲检，以此类推。当终端设备的计算能力相对较强时，则终端设备可以同时在多个搜索空间进行盲检，其中针对每个搜索空间，检测到属于自己的PDCCH时，则停止检测该搜索空间。
举例来说，终端设备按照聚合等级由低至高的顺序依次在不用的聚合等级对应的搜索空间上进行盲检测，如果该终端设备在某个聚合等级(例如，AL＝2)下的第一搜索空间盲检测到了第一PDCCH，在其他聚合等级(例如，AL＝4、8)下可以直接在第二搜索空间尝试接收第二PDCCH。因此，有利于减小终端设备的计算量。
方式二：
该终端设备可以根据预先定义的规则，从预先配置的控制资源集合中确定多个资源组。该多个资源组与多个网络设备一一对应。
在方式二中，终端设备可以预先获取(例如，预先配置在终端设备中)预先规定的规则以及预先配置的控制资源集合。终端设备可以根据该预先规定的规则，从该控制资源集合中确定各网络设备的资源组，进而确定各PDCCH的搜索空间。
具体地，该预先设定的规则可以为以下任意一种：
规则一：根据该终端设备接入的网络设备的数量，平均分配该控制资源集合中的资源，以得到该多个资源组。
规则二：根据该终端设备与该多个网络设备之间的多个信道的信道质量，按比例分配该控制资源集合中的资源，以得到该多个资源组。
在规则二中，需要注意的是，终端设备和网络控制器需要根据相同的参考信号的接收功率来分配控制资源集合中的资源。因此，网络控制器可以通过各网络设备将参考信号的接收功率发送给终端设备，以便于该终端设备确定资源分配的比例。可选地，各网络设备可以通过高层信令向终端设备发送RSRP。
该终端设备根据预先规定的规则确定多个资源组的具体过程与S310中网络控制器确定多个资源组的具体过程相同，为了简洁，这里不再赘述。
需要说明的是，若终端设备能够确定多个网络设备发送的PDCCH的搜索空间，则该终端设备可以将每个网络设备发送的PDCCH的搜索空间定义为一个搜索空间，UE专用搜索空间可以包括多个搜索空间。
应理解，在本发明实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。例如，S360可以在S350之前执行，也可以在S340之前执行，甚至还可以与S310同时进行，或者在S310之前或之后执行。
因此，本发明实施例通过在预先配置的控制资源集合中为多个网络设备分配资源组，且多个资源组之间彼此不重叠，再进一步在各资源组中确定用于发送PDCCH的资源，可以避免多个网络设备向同一终端设备发送多个PDCCH时可能出现的资源冲突，从而保证DCI传输的可靠性，有利于提高数据传输的可靠性。
以上，结合图3至图8详细说明了本发明实施例的传输控制信道的方法。以下，结合图9至图14详细说明本发明实施例的网络设备、网络控制器和终端设备。
图9是本发明实施例提供的网络设备10的示意性框图。如图9所示，该网络设备10包括：收发模块11和确定模块12。
具体地，该收发模块11用于接收网络控制器发送的资源组指示信息，该资源组指示信息指示的资源与其他网络设备所使用的资源不重叠；
该确定模块12用于根据终端设备的用户设备UE专用搜索空间和该资源组指示信息，确定第一搜索空间；
该收发模块11还用于通过该第一搜索空间向该终端设备发送第一物理下行控制信道PDCCH。
可选地，该终端设备的UE专用搜索空间包括多个子空间，该多个子空间离散地分布于该多个资源组中。
可选地，该收发模块11还用于向该终端设备发送资源组指示信息，该资源组指示信息用于指示该第一网络设备所使用的资源组的资源位置。
应理解，网络设备10可以对应于根据本发明实施例的传输控制信道的方法300中的第一网络设备，该网络设备10可以包括用于执行图3中传输控制信道的方法300的第一网络设备执行的方法的模块。并且，该网络设备10中的各模块和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，收发模块11用于执行方法300中的S320和S340，确定模块12用于执行方法300中的S330，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
图10是本发明实施例提供的网络控制器20的示意性框图。如图10所示，该网络控制器20包括：确定模块21和收发模块22。
具体地，该确定模块21用于根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中为该终端设备接入的多个网络设备分配多个资源组，该多个资源组与该多个网络设备一一对应，该多个资源组中的任意两个资源组的资源不重叠；
该收发模块22用于向该多个网络设备发送多个资源组指示信息，该多个资源组指示信息与该多个网络设备一一对应，该资源组指示信息用于指示该网络设备能够使用的资源组的资源位置。
可选地，该确定模块21具体用于根据预先设定的规则和终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定该多个资源组，
其中，该预先设定的规则包括：根据该终端设备接入的网络设备的数量，平均分配该控制资源集合中的资源，以得到该多个资源组；或者，
根据该终端设备与该多个网络设备之间的多个信道的信道质量，按比例分配该控制资源集合中的资源，以得到该多个资源组。
应理解，网络控制器20可以对应于根据本发明实施例的传输控制信道的方法300中的网络控制器，该网络控制器20可以包括用于执行图3中传输控制信道的方法300的网络控制器执行的方法的模块。并且，该网络控制器20中的各模块和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，确定模块21用于执行方法300中的S310，收发模块22用于执行方法300中的S320，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
图11是本发明实施例提供的终端设备30的示意性框图。如图11所示，该终端设备30包括：确定模块31和收发模块32。
具体地，该确定模块31用于从预先配置的控制资源集合中确定多个资源组，该多个 资源组中的任意两个资源组的资源不重叠；
该确定模块31还用于根据用户设备UE专用搜索空间和该多个资源组，确定多个搜索空间；
该收发模块32用于在该多个搜索空间上接收多个网络设备发送的多个物理下行控制信息PDCCH，该多个网络设备与该多个PDCCH一一对应。
可选地，该确定模块31具体用于根据预先设定的规则和该终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组，
其中，该预先设定的规则包括：根据该终端设备接入的网络设备的数量，平均分配该控制资源集合中的资源，以得到该多个资源组；或者，
根据该终端设备与该多个网络设备之间的多个信道的信道质量，按比例分配该控制资源集合中的资源，以得到该多个资源组。
可选地，该收发模块32还用于接收该多个网络设备发送的多个资源组指示信息，该多个资源组指示信息与该多个网络设备一一对应，该资源组指示信息用于指示该网络设备所使用的资源组的资源位置；
该确定模块31具体用于根据该多个资源组指示信息，确定该多个资源组。
可选地，该终端设备的UE专用搜索空间包括多个子空间，该多个子空间离散地分布于该多个资源组中。
应理解，终端设备30可以对应于根据本发明实施例的传输控制信道的方法300中的终端设备，该终端设备30可以包括用于执行图3中传输控制信道的方法300的终端设备执行的方法的模块。并且，该终端设备30中的各模块和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，确定模块31用于执行方法300中的S360，收发模块11用于执行方法300中的S350，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
图12是本发明实施例提供的网络设备400的另一示意性框图。如图12所示，该网络设备400包括处理器410和收发器420，可选地，该网络设备400还包括存储器430。其中，其中，处理器410、收发器420和存储器430之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器430用于存储计算机程序，该处理器410用于从该存储器430中调用并运行该计算机程序，以控制该收发器420收发信号。当存储器430中存储的程序指令被处理器410执行时，该处理器410用于控制收发器420接收网络控制器发送的第一指示信息，该第一指示信息用于指示该网络设备400能够使用的第一资源组的资源位置，该第一资源组由该网络控制器从预先配置的控制资源集合中确定；该处理器410用于根据终端设备的UE专用搜索空间和该第一资源组，确定第一搜索空间，该第一搜索空间的资源属于该UE专用搜索空间，且属于该第一资源组；该收发器420用于通过该第一搜索空间向该终端设备发送第一物理下行控制信道PDCCH。
上述处理器410和存储器430可以合成一个处理装置，处理器410用于执行存储器430中存储的程序代码来实现上述功能。具体实现时，该存储器430也可以集成在处理器410中，或者独立于处理器410。
上述网络设备还可以包括天线440，用于将收发器420输出的下行数据或下行控制信令通过无线信号发送出去。具体地，该网络设备400可对应于根据本发明实施例的传输控 制信道的方法300中的网络设备，该网络设备400可以包括用于执行图3中传输控制信道的方法300的网络设备执行的方法的单元。并且，该网络设备30中的各单元和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，该存储器430用于存储程序代码，使得处理器410在执行该程序代码时，控制该收发器420通过天线440执行方法300中的S320和S340，并执行方法300中的S330，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
图13是本发明实施例提供的网络控制器500的另一示意性框图。如图13所示，该网络控制器500包括：收发器510和处理器520。可选地，该网络控制器500还包括存储器530。其中，处理器510、收发器520和存储器530之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器530用于存储计算机程序，该处理器510用于从该存储器530中调用并运行该计算机程序，以控制该收发器520收发信号。当存储器530中存储的程序指令被处理器510执行时，该处理器510用于根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组，该多个资源组与该终端设备接入的多个网络设备一一对应，该资源组用于该网络设备发送物理下行控制信道PDCCH，该多个资源组中的任意两个资源组的资源不重叠；该处理器510还用于控制收发器520向所述多个网络设备发送多个指示信息，所述指示信息用于指示所述网络设备能够使用的资源组的资源位置，所述多个指示信息与所述多个网络设备一一对应。
应理解，网络控制器500可以对应于根据本发明实施例的传输控制信道的方法300中的网络控制器，该网络控制器500可以包括用于执行图3中传输控制信道的方法300的网络控制器执行的方法的模块。并且，该网络控制器500中的各模块和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，该存储器530用于存储程序代码，使得处理器510在执行该程序代码时，执行方法300中的S310，并控制收发器520执行方法300中的S320，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
图14是本发明实施例提供的终端设备600的另一示意性框图。如图14所示，该终端设备600包括处理器601和收发器602，可选地，该终端设备600还包括存储器603。其中，其中，处理器602、收发器602和存储器603之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器603用于存储计算机程序，该处理器601用于从该存储器603中调用并运行该计算机程序，以控制该收发器602收发信号。
当存储器603中存储的程序指令被处理器601执行时，该处理器601用于从预先配置的控制资源集合中确定多个资源组，该多个资源组中的任意两个资源组不重叠；该处理器601还用于根据用户设备UE专用搜索空间和该多个资源组，确定多个搜索空间，每个搜索空间的资源属于该UE专用搜索空间，且属于一个资源组；该处理器601还用于控制收发器602在该多个搜索空间上接收多个网络设备发送的多个物理下行控制信息PDCCH，该多个网络设备与该多个PDCCH一一对应。
上述处理器601和存储器603可以合成一个处理装置，处理器601用于执行存储器603中存储的程序代码来实现上述功能。具体实现时，该存储器603也可以集成在处理器601中，或者独立于处理器601。上述终端设备600还可以包括天线604，用于将收发器602输出的上行数据或上行控制信令通过无线信号发送出去。
应理解，终端设备600可以对应于根据本发明实施例的传输控制信道的方法300中的终端设备，该终端设备600可以包括用于执行图3中传输控制信道的方法300的终端设备执行的方法的模块。并且，该终端设备600中的各模块和上述其他操作和/或功能分别为了实现图3中传输控制信道的方法300的相应流程，具体地，该存储器603用于存储程序代码，使得处理器601在执行该程序代码时，处理器601执行方法300中的S360，并控制收发器602执行方法300中的S350，各模块执行上述相应步骤的具体过程在方法300中已经详细说明，为了简洁，在此不再赘述。
上述处理器601可以用于执行前面方法实施例中描述的由终端内部实现的动作，而收发器602可以用于执行前面方法实施例中描述的终端向网络设备传输或者发送的动作。具体请见前面方法实施例中的描述，此处不再赘述。
上述处理器601和存储器603可以集成为一个处理装置，处理器601用于执行存储器603中存储的程序代码来实现上述功能。具体实现时，该存储器603也可以集成在处理器601中。
上述终端设备600还可以包括电源605，用于给终端中的各种器件或电路提供电源。
除此之外，为了使得终端设备的功能更加完善，该终端设备600还可以包括输入单元606，显示单元607，音频电路608，摄像头609和传感器510等中的一个或多个，所述音频电路还可以包括扬声器6082，麦克风6084等。
应理解，本发明实施例中，该处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。
还应理解，本发明实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载或执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存 储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital versatile disc，DVD))、或者半导体介质。半导体介质可以是固态硬盘。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM)、随机存取存储器(RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种传输控制信道的方法，其特征在于，包括：第一网络设备接收网络控制器发送的资源组指示信息，所述资源组指示信息指示的资源与其他网络设备所使用的资源不重叠；
    所述第一网络设备根据终端设备的用户设备UE专用搜索空间和所述资源组指示信息，确定第一搜索空间；
    第一网络设备通过所述第一搜索空间向所述终端设备发送第一物理下行控制信道PDCCH。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备向所述终端设备发送资源组指示信息，所述资源组指示信息用于指示所述第一网络设备所使用的资源组的资源位置。
  4. 一种传输控制信道的方法，其特征在于，包括：
    网络控制器根据终端设备所接入的网络设备的数量，从预先配置的控制资源集合中为所述多个网络设备分配多个资源组，所述多个资源组与所述多个网络设备一一对应，所述多个资源组中的任意两个资源组的资源不重叠；
    所述网络控制器向所述多个网络设备发送多个资源组指示信息，所述多个资源组指示信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备能够使用的资源组的资源位置。
  5. 根据权利要求4所述的方法，其特征在于，所述网络控制器根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组，包括：
    所述网络控制器根据预先设定的规则和终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定所述多个资源组；
    其中，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组；或者，
    根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
  6. 一种传输控制信道的方法，其特征在于，包括：
    终端设备从预先配置的控制资源集合中确定多个资源组，所述多个资源组与所述终端设备接入的多个网络设备一一对应，所述多个资源组中的任意两个资源组的资源不重叠；
    所述终端设备根据用户设备UE专用搜索空间和所述多个资源组，确定多个搜索空间；
    所述终端设备在所述多个搜索空间上接收多个网络设备发送的多个物理下行控制信息PDCCH，所述多个网络设备与所述多个PDCCH一一对应。
  7. 根据权利要求6所述的方法，其特征在于，所述终端设备从预先配置的控制资源集合中确定多个资源组，包括：
    所述终端设备根据预先设定的规则和所述终端设备接入的网络设备的数量，从预先配 置的控制资源集合中确定多个资源组；
    其中，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组；或者，
    根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
  8. 根据权利要求6所述的方法，其特征在于，所述终端设备从预先配置的控制资源集合中确定多个资源组，包括：
    所述终端设备接收所述多个网络设备发送的多个资源组指示信息，所述多个资源组指示信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备所使用的资源组的资源位置。
  9. 根据权利要求6至8中任一项所述的方法，其特征在于，所述终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
  10. 一种网络设备，其特征在于，包括：
    收发器，用于接收网络控制器发送的资源组指示信息，所述资源组指示信息指示的资源与其他网络设备所使用的资源不重叠；
    处理器，用于根据终端设备的用户设备UE专用搜索空间和所述资源组指示信息，确定第一搜索空间；
    所述收发器还用于通过所述第一搜索空间向所述终端设备发送第一物理下行控制信道PDCCH。
  11. 根据权利要求10所述的网络设备，其特征在于，所述终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
  12. 根据权利要求10或11所述网络设备，其特征在于，所述收发器还用于向所述终端设备发送资源组指示信息，所述资源组指示信息用于指示所述第一网络设备所使用的资源组的资源位置。
  13. 一种网络控制器，其特征在于，包括：
    处理器，用于根据终端设备接入的网络设备的数量，从预先配置的控制资源集合中为所述多个网络设备分配多个资源组，所述多个资源组与所述多个网络设备一一对应，所述多个资源组中的任意两个资源组的资源不重叠；
    收发器，用于向所述多个网络设备发送多个资源组指示信息，所述多个资源组指示信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备能够使用的资源组的资源位置。
  14. 根据权利要求13所述的网络控制器，其特征在于，所述处理器具体用于根据预先设定的规则和终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定所述多个资源组；
    其中，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组；或者，
    根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
  15. 一种终端设备，其特征在于，包括：
    处理器，用于从预先配置的控制资源集合中确定多个资源组，所述多个资源组中的任意两个资源组的资源不重叠；
    所述处理器还用于根据用户设备UE专用搜索空间和所述多个资源组，确定多个搜索空间；
    收发器，用于接收在所述多个搜索空间上接收多个网络设备发送的多个物理下行控制信息PDCCH，所述多个网络设备与所述多个PDCCH一一对应。
  16. 根据权利要求15所述的终端设备，其特征在于，所述处理器具体用于根据预先设定的规则和所述终端设备接入的网络设备的数量，从预先配置的控制资源集合中确定多个资源组；
    其中，所述预先设定的规则包括：根据所述终端设备接入的网络设备的数量，平均分配所述控制资源集合中的资源，以得到所述多个资源组；或者，
    根据所述终端设备与所述多个网络设备之间的多个信道的信道质量，按比例分配所述控制资源集合中的资源，以得到所述多个资源组。
  17. 根据权利要求15所述的终端设备，其特征在于，所述收发器还用于接收所述多个网络设备发送的多个资源组指示信息，所述多个资源组指示信息与所述多个网络设备一一对应，所述资源组指示信息用于指示所述网络设备所使用的资源组的资源位置；
    所述处理器具体用于根据所述多个资源组指示信息，确定所述多个资源组。
  18. 根据权利要求15至17中任一项所述的终端设备，其特征在于，所述终端设备的UE专用搜索空间包括多个子空间，所述多个子空间离散地分布于所述多个资源组中。
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