WO2021134356A1 - 一种通信方法及通信装置 - Google Patents

一种通信方法及通信装置 Download PDF

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Publication number
WO2021134356A1
WO2021134356A1 PCT/CN2019/130190 CN2019130190W WO2021134356A1 WO 2021134356 A1 WO2021134356 A1 WO 2021134356A1 CN 2019130190 W CN2019130190 W CN 2019130190W WO 2021134356 A1 WO2021134356 A1 WO 2021134356A1
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WIPO (PCT)
Prior art keywords
information
search space
terminal device
control information
rnti
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PCT/CN2019/130190
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English (en)
French (fr)
Inventor
刘荣宽
王婷
张鹏
许华
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/130190 priority Critical patent/WO2021134356A1/zh
Priority to CN201980103108.4A priority patent/CN114830770A/zh
Priority to EP19958621.5A priority patent/EP4072213A4/en
Publication of WO2021134356A1 publication Critical patent/WO2021134356A1/zh
Priority to US17/853,504 priority patent/US20220338228A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a communication method and a communication device.
  • the fifth generation (5G) communication system supports various new wireless service types, such as the Internet of Things and autonomous driving.
  • the 5G communication system also supports user-coordinated transmission, which can significantly increase the capacity of the communication system and the coverage of the network through user-coordinated transmission, and can also reduce the load on the base station side.
  • a base station can transmit a physical downlink control channel (PDCCH) through a search space, and a terminal device can perform blind detection in the search space to obtain downlink control information (DCI) carried on the PDCCH.
  • PDCCH physical downlink control channel
  • DCI downlink control information
  • Existing search spaces are divided into public search spaces and user equipment (UE) specific search spaces.
  • the base station DCI can scramble the DCI with the identity of the cooperation group, and the terminal device can perform blind detection in all public search spaces and the UE-specific search space owned by the terminal device according to the identity of the cooperation group, and obtain the information sent by the base station.
  • DCI the complexity of blind inspection of terminal equipment is relatively high.
  • the embodiments of the present application provide a communication method and a communication device, which can reduce the complexity of blind detection of terminal equipment in a cooperative transmission scenario.
  • a communication method includes: a first terminal device receives a first message from a network device, the first message includes first information and second information; the first information is used to indicate a first search space , The second information is used to indicate the identity of the first cooperation group, where the first cooperation group includes the first terminal device and the second terminal device; the first terminal device obtains the first terminal device from the first search space according to the first information and the second information.
  • Control information the first control information is used to schedule the downlink data of the second terminal device, or the first control information is used to indicate the downlink data of the second terminal device.
  • the downlink data of the second terminal device refers to that the destination address of the downlink data is the second terminal device.
  • the downlink data of the terminal device all indicate that the destination address of the downlink data is the terminal data, which will not be repeated hereafter.
  • the terminal device can obtain the collaboration group identifier and search space configured by the network device through a message (for example, the first search space described in the embodiment of this application), and then use the identifier of the collaboration group in the Blind detection is performed in the search space of the message configuration to obtain the downlink control information sent by the network device.
  • the method provided by the embodiment of the present application associates the collaboration group with the search space through the first message, and the terminal device does not need to perform blind detection in all public search spaces and UE-specific search spaces owned by the terminal device.
  • the downlink control information sent by the network device can be obtained by performing blind detection in the first search space indicated by the network device according to the identifier of the cooperation group, which greatly reduces the complexity of the blind detection of the terminal device.
  • the method further includes: the first terminal device receives downlink data of the second terminal device from the network device according to the first control information; the first terminal device Forward the downlink data received from the network device to the second terminal device.
  • the first terminal device may receive the downlink data sent by the network device according to the control information obtained from the search space, and assist the network device to forward the downlink data to the second terminal device.
  • the terminal device obtains the downlink control information through the search space, which improves the transmission security in the cooperative transmission scenario.
  • the first search space is a common search space, or the first search space is a first collaboration Group-specific search space.
  • the embodiments of the present application also provide possible examples of search spaces used for cooperative transmission scenarios, and the existing public search spaces can be used to transmit DCI under cooperative transmission scenarios without defining a new search space.
  • the dedicated search space is used to transmit DCI related to a certain cooperative group.
  • the dedicated search space is only used to transmit the control information of the terminal devices in the cooperation group. Compared with the transmission of the control information related to the cooperation group through the common search space, the collision of the control channel is reduced.
  • the second information is associated with the first search space.
  • the first search space and the identification of the cooperation group can be configured in an IE of the RRC message (for example, the first message described in the embodiment of the present application).
  • the second information is associated with the first search space, and the first search space may be used to transmit the DCI related to the cooperation group indicated by the second information.
  • the first terminal device is based on the first information and the second
  • the information acquiring the first control information from the first search space includes: the first terminal device receives the first control information scrambled by the first cooperation group identifier in the first search space indicated by the first information; The information descrambles the first control information scrambled by the first cooperation group identifier.
  • the embodiment of the present application also provides a specific implementation in which the first terminal device obtains control information from the first search space according to the first information and the second information.
  • the network device sends control information in a search space, and all terminal devices in the cooperation group can obtain the downlink control information sent by the network device from one search space, which saves signaling overhead.
  • the format of the first control information is dedicated for cooperative transmission .
  • a type of control information dedicated to cooperative transmission may be defined, and the network device may transmit the control information in this format through the search space.
  • the existing control information format may not meet the requirements of cooperative transmission, and the definition of special control information for cooperative transmission can better perform cooperative transmission.
  • the first message further includes third information, and the third The information is used to indicate the format of control information dedicated to cooperative transmission.
  • the terminal device may also determine the format of the first control information through the RRC message sent by the network device (for example, the first message described in the embodiment of the present application).
  • the format of the control information is different, and the payload size of the control information is different.
  • the terminal device performs a blind check according to the format of the first control information, and judges whether the first control information is received by the payload size corresponding to this format. When the payload size of the received message matches the payload size corresponding to the control information format dedicated to cooperative transmission, it is determined that the first control information is received indirectly through the first search space.
  • the first cooperation group identifier is the radio network temporary identifier RNTI ; Wherein, the first cooperation group identity is different from the RNTI of the first terminal device and the RNTI of the second terminal device; or, the first cooperation group identity is the same as the RNTI of the second terminal device.
  • the embodiments of the present application provide possible implementations of the identification of the cooperation group.
  • the identification of the cooperation group may be an RNTI, but is different from the RNTI of the CUE and TUE. Allocating a dedicated RNTI to the cooperation group can avoid confusion with the RNTI of the terminal equipment.
  • the cooperation group identifier may also be the RNTI of the TUE, and there is no need to configure the cooperation group identifier, which can save the available sequence value of the RNTI.
  • the first information includes the first offset and the common
  • the first offset is the offset between the first search space and the common search space.
  • the terminal device when the network device transmits control information through the search space dedicated to the cooperation group, the terminal device can accurately determine the search space dedicated to the cooperation group according to the first offset and the information of the public search space.
  • a communication method in a second aspect, includes: network device first information and second information; the first information is used to indicate a first search space, and the second information is used to indicate a first cooperation group identifier, where , The first cooperation group includes a first terminal device and a second terminal device; the network device sends a first message to the first terminal device, and the first message includes the first information and the second information.
  • the first search space is a public search space, or the first search space is a search space dedicated to the first collaboration group.
  • the second information is associated with the first search space.
  • the format of the first control information is dedicated to cooperative transmission.
  • the first message further includes third information, and the third information is used to indicate cooperation Transmission-specific control information format.
  • the first cooperation group identifier is the radio network temporary identifier RNTI; where the first The cooperation group identifier is different from the RNTI of the first terminal device and the RNTI of the second terminal device; or, the first cooperation group identifier is the same as the RNTI of the second terminal device.
  • the first information includes the first offset and the information of the common search space
  • the first offset is the offset between the first search space and the common search space.
  • a communication device including: a communication unit, configured to receive a first message from a network device, the first message including first information and second information; the first information is used to indicate a first message In the search space, the second information is used to indicate a first cooperation group identifier, where the first cooperation group includes the first terminal device and the second terminal device; and the processing unit is configured to use the first information and The second information obtains first control information from the first search space, and the first control information is used to schedule downlink data of the second terminal device, or the first control information is used to indicate the Downlink data of the second terminal device.
  • the processing unit is further configured to receive the second terminal from the network device through the communication unit according to the first control information Downlink data of the device; the communication unit is further configured to forward the downlink data to the second terminal device.
  • the first search space is a common search space, or the first search space is The search space dedicated to the first collaboration group.
  • the second information and the first search space Associated.
  • the processing unit is specifically configured to , Receiving, through the communication unit, the first control information scrambled by the first cooperation group identifier in the first search space indicated by the first information; the processing unit is further configured to, according to the The second information descrambles the first control information scrambled by the first cooperation group identifier.
  • the value of the first control information is dedicated to cooperative transmission.
  • the first message further includes The third information is used to indicate a control information format dedicated to cooperative transmission.
  • the first cooperation group identifier Is the wireless network temporary identification RNTI; wherein, the first cooperation group identification is different from the RNTI of the first terminal device and the RNTI of the second terminal device; or, the first cooperation group identification is different from the second The RNTI of the terminal equipment is the same.
  • the first information includes the first An offset and information about the common search space, where the first offset is the offset between the first search space and the common search space.
  • a communication device including: a processing unit for first information and second information; the first information is used to indicate a first search space, and the second information is used to indicate a first collaboration A group identifier, wherein the first cooperative group includes the first terminal device and the second terminal device; the communication unit is configured to send a first message to the first terminal device, and the first message includes first information And second information.
  • the first search space is a public search space, or the first search space is a search space dedicated to the first cooperation group.
  • the second information is associated with the first search space.
  • the format of the first control information is dedicated to cooperative transmission.
  • the first message further includes third information,
  • the third information is used to indicate a control information format dedicated to coordinated transmission.
  • the first cooperation group identifier is a wireless network temporary Identifies the RNTI; wherein the first cooperation group identifier is different from the RNTI of the first terminal device and the RNTI of the second terminal device; or, the first cooperation group identifier is different from the RNTI of the second terminal device the same.
  • the first information includes the first offset And the information of the common search space, where the first offset is the offset between the first search space and the common search space.
  • the communication unit may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the transceiver may be an integrated device.
  • the processing module can be a processor, such as a baseband chip.
  • the communication device is a component having the functions of the aforementioned network equipment and terminal equipment
  • the communication unit may be a radio frequency unit
  • the processing module may be a processor.
  • the communication device is a chip system
  • the communication unit may be an input/output interface of the chip system
  • the processing module may be a processor of the chip system, such as a central processing unit (CPU).
  • a communication device including at least one processor and a memory, where the at least one processor is coupled to the memory; the memory is configured to store a computer program;
  • the at least one processor is configured to execute a computer program stored in the memory, so that the apparatus executes the method according to any one of the foregoing second aspect and the second aspect, or, the foregoing first aspect And the method described in any implementation manner of the first aspect.
  • a computer-readable storage medium including: instructions are stored in the computer-readable storage medium; when the computer-readable storage medium is implemented in any one of the above-mentioned third aspect and the third aspect, the sixth aspect And when running on the communication device described in any one of the implementation manners of the sixth aspect, the communication device is caused to execute the communication method described in the foregoing first aspect and any one of the implementation manners of the first aspect.
  • a computer-readable storage medium including: instructions stored in the computer-readable storage medium; When the device is running, the communication device is caused to execute the communication method described in the second aspect and any one of the implementation manners of the second aspect.
  • a wireless communication device includes a processor, for example, applied to a communication device for implementing the method described in the first aspect and any one of the implementation manners of the first aspect.
  • the device may be a chip system, for example.
  • the chip system further includes a memory for storing program instructions and data necessary to realize the functions of the method described in the first aspect.
  • a wireless communication device includes a processor, for example, applied to a communication device for implementing the above-mentioned second aspect and the method involved in any one of the implementation manners of the second aspect Function or method, the communication device may be a chip system, for example. In a feasible implementation manner, the chip system further includes a memory for storing program instructions and data necessary to realize the functions of the method described in the second aspect.
  • the chip system in the above aspect may be a system on chip (SOC) or a baseband chip, where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
  • SOC system on chip
  • baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
  • a communication system including a network device, a first terminal device, and a second terminal device.
  • the network device is used to determine the first information and the second information; the first information is used to indicate the first search space, and the second information is used to indicate the identity of the first cooperation group.
  • the first cooperation group includes the first terminal device and the second terminal device. Terminal Equipment;
  • the network device is further configured to send a first message to the first terminal device, where the first message includes the first information and the second information;
  • the first terminal device is configured to receive the first message from the network device, and obtain the first control information from the first search space according to the first information and the second information, and the first control information is used to schedule the downlink data of the second terminal device, or Say that the first control information is used to indicate the downlink data of the second terminal device;
  • the first terminal device is further configured to receive downlink data of the second terminal device according to the first control information, and send the downlink data to the second terminal device.
  • FIG. 1 is a schematic diagram of a cooperative transmission scenario provided by an embodiment of the application
  • FIG. 2 is another schematic diagram of a cooperative transmission scenario provided by an embodiment of the application
  • FIG. 3 is a schematic diagram of a communication system provided by an embodiment of the application.
  • Fig. 4a is a structural block diagram of a communication device provided by an embodiment of the application.
  • FIG. 4b is another structural block diagram of a communication device provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of another flow of a communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of another flow of a communication method provided by an embodiment of this application.
  • 8 to 11 are another structural block diagrams of a communication device provided by an embodiment of this application.
  • User cooperative transmission refers to one terminal device assisting another terminal device to complete data transmission, which can significantly improve system capacity and network coverage. For example, if the terminal device 1 is at the edge of a cell with weak coverage, the base station can send data to the terminal device 2 in the strong coverage area, and the terminal device 2 forwards the data to the terminal device 1.
  • Figure 1 is a scenario of downlink user cooperative transmission.
  • the base station may send data to cooperation user equipment (CUE) and target user equipment (TUE).
  • CUE cooperation user equipment
  • TUE target user equipment
  • the CUE can send the received data to the TUE via a sidelink.
  • TUE can jointly decode the data from the base station and the data from the CUE to improve data reception performance.
  • the base station prepares the data that needs to be sent to the TUE, and sends the data to TUE, CUE1, and CUE2.
  • CUE1 and CUE2 send the received data to the TUE.
  • the TUE can respond to the data from the base station, the data from CUE1,
  • the data from CUE2 is jointly decoded.
  • Figure 2 is another scenario of downlink user cooperative transmission.
  • the base station only sends data to the CUE, the CUE can send the received data to the TUE through the side link, and the TUE receives the data from the CUE.
  • the base station prepares the data that needs to be sent to the TUE, and sends the data to CUE1 and CUE2.
  • CUE1 and CUE2 send the received data to the TUE.
  • the TUE can jointly decode the data from CUE1 and the data from CUE2. .
  • the TUE and several CUEs served for it form a cooperation user group (UC group).
  • UC group cooperation user group
  • the TUE, CUE1 and CUE2 in FIG. 1 or FIG. 2 form a user cooperation group.
  • a user cooperation group includes only one TUE.
  • a UE it can be a TUE in a user cooperation group, and it can also be a CUE in another user cooperation group. In the same cell, there can be multiple different user cooperation groups.
  • RNTI Radio Network Temporary Identifier, wireless network temporary identifier
  • the RNTI is an identifier agreed between the user equipment and the base station to distinguish different user equipments, and different user equipments can be distinguished through the RNTI.
  • C-RNTI (cell-RNTI) is a common RNTI that can represent service information of user equipment.
  • the network device can use the PDCCH to schedule the uplink data or downlink data of the terminal device.
  • the PDCCH can carry downlink control information (downlink control information, DCI)
  • the terminal device can receive a physical downlink data channel (physical downlink, PDSCH) according to the DCI; or, send a physical uplink data channel (physical uplink, PUSCH) according to the DCI.
  • DCI downlink control information
  • DCI has multiple formats.
  • DCI can indicate cell-level information or UE-level information. Among them, the cell-level information is common to all UEs in the cell, and the UE-level information is only applicable to a certain UE and not applicable to other UEs in the cell.
  • a PDCCH can only carry a DCI of a certain format.
  • a PDCCH is transmitted on n consecutive control channel elements (CCEs), and each CCE is composed of a certain number of resource element groups (REG). .
  • the format of the DCI carried by the PDCCH is different, and the aggregation level (AL) of the PDCCH may be different. Among them, the aggregation level indicates the number of consecutive CCEs occupied by one PDCCH. For example, the aggregation levels (AL) corresponding to DCI format ⁇ 0,1,2,3 ⁇ are ⁇ 1,2,4,8 ⁇ respectively.
  • the terminal device needs to monitor a set of candidate PDCCHs before successfully receiving the PDCCH, that is, the terminal device tries to decode each PDCCH in the set according to the DCI format to be monitored. If the terminal device successfully decodes one PDCCH in the candidate PDCCH set during the monitoring process, it means that the terminal device successfully receives the PDCCH.
  • the above candidate PDCCH set may be referred to as a search space.
  • the search space is divided into a common search space (CSS) and a UE-specific search space (UE-specific search space, USS).
  • the public search space is used to transmit cell-level DCI, and all UEs under the cell can perform blind detection in the public search space to obtain cell-level DCI, for example, with Paging (paging), random access ( Random Access (RA) response (Response), broadcast control channel (broadcast control channel, BCCH) and other related control information.
  • Paging paging
  • Random Access (RA) response Random Access
  • Response broadcast control channel
  • BCCH broadcast control channel
  • the UE-specific search space is used to transmit UE-level DCI, and only a certain UE can obtain the DCI sent by the base station to the UE through blind detection. For example, control information related to a downlink data channel (downlink-shared channel, DL-SCH), an uplink data channel (uplink-shared channel, UL-SCH), and so on.
  • control information related to a downlink data channel (downlink-shared channel, DL-SCH), an uplink data channel (uplink-shared channel, UL-SCH), and so on.
  • the base station can configure search space-related parameters through radio resource control (RRC) messages, such as search space index, associated control resource set, PDCCH monitoring period, PDCCH monitoring duration in each PDCCH monitoring period, and each PDCCH monitoring period. Number of candidate PDCCHs under each CCE aggregation level, monitored DCI format, etc.
  • RRC radio resource control
  • the terminal device can determine the search space for blind detection according to the parameters related to the search space.
  • the terminal device can determine the search space through the CCE occupied by the search space.
  • the CCEs distributed on the entire bandwidth can be numbered, so as to determine the index of the CCEs occupied by a certain search space.
  • a control resource set (CORESET) can be divided on the bandwidth, and the CCEs distributed on a CORESET are individually numbered.
  • the search space can be associated with a certain CORESET, and the terminal device can determine the search space based on the index of the CCE occupied by the search space on the CORESET.
  • the index of the CCE occupied by the search space associated with CORESET p satisfies the following formula (1):
  • a carrier indication field can be configured for the UE through CrossCarrierSchedulingConfig.
  • Is the time slot number, L is the aggregation level, Is the index of the search space.
  • N CCE,p is the number of CCEs occupied by the search space associated with CORESET p, and the number of CCEs ranges from 0 to N CCE,p -1;
  • the sender can use a pseudo-random code sequence to multiply the data to be sent to scramble the data to encrypt the data to prevent the data from being tampered with during transmission.
  • the pseudo-random code sequence used can be referred to as a scrambling code sequence.
  • the base station can scramble the data mapped on the physical downlink shared channel (physical downlink shared channel, PDSCH) by using the scrambling code sequence.
  • the scrambling code sequence is a bit sequence with a length of 31 bits, which is specifically obtained by adding the sequence X1 and the sequence X2 and performing a modulo 2 operation.
  • n RNTI is the RNTI associated with PDSCH transmission, that is, the RNTI of the terminal receiving the PDSCH;
  • the value of q is 0 or 1.
  • the base station uses a single codeword for transmission, that is, the data sent by the base station terminal includes a transport block (TB) for transmission;
  • TB transport block
  • n ID is the parameter dataScramblingIdentityPDSCH configured by the upper layer or Among them, the value of the high-level configuration parameter is ⁇ 0,1,...1023 ⁇ .
  • RNTI is equal to C-RNTI, MCS-C-RNTI (modulation coding scheme cell RNTI) or CS- RNTI (configured scheduling RNTI); and the network equipment does not use DCI format 1_0 to schedule the downlink data of the terminal equipment in the common search space; under other conditions, It is the physical layer cell ID, that is, the ID of the cell of the base station transmitting the PDSCH.
  • FIG. 3 shows a schematic diagram of a communication system to which the technical solution provided by this application is applicable.
  • the communication system may include multiple network devices (only network device 100 is shown) and multiple terminal devices (only shown in the figure).
  • FIG. 3 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solutions provided in this application.
  • the network equipment and the terminal equipment can perform uplink and downlink transmission through the cellular link (Uu link), and the terminal equipment can communicate through the side link (sidelink link), such as D2D communication, V2X communication, and machine Type communication (machine type communication, MTC), etc.
  • sidelink link such as D2D communication, V2X communication, and machine Type communication (machine type communication, MTC), etc.
  • Cooperative transmission can also be performed between the network device 100 and the terminal device.
  • the terminal device 201 and the terminal device 202 may form a user cooperation group.
  • the terminal device 201 serves as a CUE
  • the terminal device 202 serves as a TUE.
  • the network device sends data to the terminal device 201, and the terminal device 201 sends data to the terminal device 202 after receiving the data from the network device.
  • the terminal device 201 serves as a CUE
  • the terminal device 202 serves as an SUE.
  • the terminal device 202 sends data to the terminal device 201, and the terminal device 201 sends data to the network device after receiving the data from the terminal device 202.
  • the network device 100 may be any device with a wireless transceiving function. Including but not limited to: evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional NodeB), base station in NR (gNodeB or gNB) or transmission receiving point/transmission reception point (TRP), 3GPP Subsequent evolution of base stations, access nodes in the WiFi system, wireless relay nodes, wireless backhaul nodes, etc.
  • the base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support networks of the same technology mentioned above, or networks of different technologies mentioned above.
  • the base station can contain one or more co-site or non-co-site TRPs.
  • the network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device.
  • the following description takes the network device as a base station as an example.
  • the multiple network devices may be base stations of the same type, or base stations of different types.
  • the base station can communicate with the terminal equipment, and it can also communicate with the terminal equipment through the relay station.
  • the terminal device can communicate with multiple base stations of different technologies.
  • the terminal device can communicate with a base station that supports an LTE network, can also communicate with a base station that supports a 5G network, and can also support communication with a base station of an LTE network and a base station of a 5G network. Double connection.
  • a terminal device (such as terminal device 201 or terminal device 202) is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.) ; Can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control (industrial control) Wireless terminals in control), vehicle-mounted terminal equipment, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety (transportation safety) Wireless terminals in ), wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, and so on.
  • VR virtual reality
  • AR augmented reality
  • industrial control industrial control
  • vehicle-mounted terminal equipment wireless terminals in self-driving
  • wireless terminals in remote medical wireless terminals in smart grid, transportation safety (transportation safety) Wireless terminals in )
  • wireless terminals in smart cities wireless terminals in smart homes, wearable terminal devices, and so on.
  • the embodiments of this application do not limit the application scenarios.
  • Terminals can sometimes be referred to as terminal equipment, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile Equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc.
  • the terminal can also be fixed or mobile.
  • the terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, An on-board component, on-board chip, or on-board unit can implement the method of the present application.
  • the network device can use the identity of the cooperation group to scramble the downlink control information, and the terminal device can use the identity of the cooperation group in all public search spaces and the UE-specific information of the terminal device.
  • the search space performs blind detection to obtain the DCI sent by the base station, and the complexity of the blind detection of the terminal equipment is relatively high.
  • a first terminal device receives a first message from a network device.
  • the first message includes first information and second information; and the first information is used to indicate the first message.
  • a search space where the second information is used to indicate a first cooperation group identifier, where the first cooperation group includes the first terminal device and the second terminal device (for example, CUE).
  • the first terminal device may also obtain first control information from the first search space according to the first information and the second information, where the first control information is used to schedule the downlink of the second terminal device data.
  • the CUE can obtain the control information for the network device to send the downlink data of the second terminal device according to the search space indicated by the first information, so that it can receive the downlink data of the second terminal device from the network device and assist the network device to send downlink data to the second terminal device.
  • the terminal device can obtain the collaboration group identifier and search space configured by the network device through a message (for example, the first search space described in the embodiment of the present application), and then according to the identifier of the collaboration group Blind detection is performed in the search space configured by the message to obtain the downlink control information sent by the network device.
  • the terminal device does not need to perform blind detection in all public search spaces and UE-specific search spaces owned by the terminal device. It only needs to perform blind detection in the first search space indicated by the network device according to the identification of the cooperation group.
  • the downlink control information sent by the network device can be obtained, which greatly reduces the complexity of blind detection of the terminal device.
  • FIG. 4a shows a schematic diagram of the hardware structure of a communication device 410 provided by an embodiment of the application.
  • the communication device 410 includes a processor 4101, a memory 4102, and at least one communication interface (in FIG. 4a, it is only an example and the communication interface 4103 is included as an example for illustration).
  • the processor 4101, the memory 4102, and the communication interface 4103 are connected to each other.
  • the processor 4101 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs used to control the execution of the program of this application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication interface 4103 can be a device that uses any transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks, WLAN )Wait.
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 4102 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory can exist independently and is connected to the processor through the communication line 4102. The memory can also be integrated with the processor.
  • the memory 4102 is used to store computer-executable instructions for executing the solution of the present application, and the processor 4101 controls the execution.
  • the processor 4101 is configured to execute computer-executable instructions stored in the memory 4102, so as to implement the intention processing method provided in the following embodiments of the present application.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
  • the processor 4101 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4a.
  • the communication device 410 may include multiple processors, such as the processor 4101 and the processor 4106 in FIG. 4a.
  • processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the communication apparatus 410 may further include an output device 4104 and an input device 4105.
  • the output device 4104 communicates with the processor 4101 and can display information in a variety of ways.
  • the output device 4104 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 4105 communicates with the processor 4101, and can receive user input in a variety of ways.
  • the input device 4105 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the aforementioned communication device 410 may be a general-purpose device or a special-purpose device.
  • the communication device 410 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in Figure 4a. equipment.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 410.
  • the communication device 410 may be a complete terminal machine, may also be a functional component or component that implements the terminal, or may be a communication chip, such as a baseband chip.
  • the communication interface may be a radio frequency module.
  • the communication interface 4103 may be the input and output interface circuit of the chip, and the input and output interface circuit is used to read in and output baseband signals.
  • Fig. 4b is a schematic structural diagram of a communication device.
  • the structure of the communication device 420 can refer to the structure shown in FIG. 4b.
  • the communication device includes at least one processor 4201, at least one memory 4202, at least one transceiver 4203, at least one network interface 4204, and one or more antennas 4205.
  • the processor 4201, the memory 4202, the transceiver 4203 and the network interface 4204 are connected.
  • the antenna 4205 is connected to the transceiver 4203.
  • the network interface 4204 is used to connect the communication device to other communication devices through the communication link, for example, the communication device is connected to the core network element through the S1 interface.
  • the connection may include various interfaces, transmission lines, or buses, etc., which is not limited in this embodiment.
  • the processor in the embodiment of the present application may include at least one of the following types: a general-purpose central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), a microprocessor, Application-Specific Integrated Circuit (ASIC), Microcontroller Unit (MCU), Field Programmable Gate Array (FPGA), or integrated circuit used to implement logic operations .
  • the processor 4201 may be a single-CPU processor or a multi-CPU processor.
  • the at least one processor 4201 may be integrated in one chip or located on multiple different chips.
  • the memory in the embodiment of the present application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory Random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or electrically erasable programmable read-only memory (EEPROM).
  • ROM read-only memory
  • RAM random access memory Random access memory
  • EEPROM electrically erasable programmable read-only memory
  • the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , A magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • a magnetic disk storage medium or other magnetic storage device or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory 4202 may exist independently and is connected to the processor 4201.
  • the memory 4202 may also be integrated with the processor 4201, for example, integrated in one chip.
  • the memory 4202 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 4201 controls execution, and various types of computer program codes executed can also be regarded as driver programs of the processor 4201.
  • the processor 4201 is configured to execute computer program codes stored in the memory 4202, so as to implement the technical solutions in the embodiments of the present application.
  • the transceiver 4203 may be used to support the reception or transmission of radio frequency signals between the communication device and terminal equipment, and the transceiver 4203 may be connected to the antenna 4205.
  • one or more antennas 4205 can receive radio frequency signals
  • the transceiver 4203 can be used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband signals or
  • the digital intermediate frequency signal is provided to the processor 4201, so that the processor 4201 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transceiver 4203 can be used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 4201, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through one or more antennas 4205 Sending the radio frequency signal.
  • the transceiver 4203 may selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the order of precedence is adjustable.
  • the transceiver 4203 can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal, the up-mixing processing and digital-to-analog conversion processing The order of precedence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • the transceiver may be called a transceiver circuit, a transceiver unit, a transceiver device, a transmission circuit, a transmission unit, or a transmission device, and so on.
  • the communication device 420 may be a complete communication device, a component or component that realizes the function of the communication device, or a communication chip.
  • the transceiver 4203 may be an interface circuit of the chip, and the interface circuit is used to read in and output baseband signals.
  • An embodiment of the present application provides a communication method. As shown in FIG. 5, the method includes the following steps:
  • Step 501 The network device sends a first message to the first terminal device and the second terminal device, where the first message includes the first information and the second information.
  • the first information is used to indicate a first search space
  • the second information is used to indicate a first cooperation group identifier, where the first cooperation group includes the first terminal device and the second terminal device.
  • the second terminal device may be located at the edge of the coverage cell of the network device, and the first terminal device in a strong coverage area may assist the network device to send data to the second terminal device.
  • the first terminal device and the second terminal device may belong to the same user cooperation group, for example, the first cooperation group described in the embodiment of the present application.
  • the first terminal device is a CUE, which is used to cooperate with the network device to transmit data to the second terminal device.
  • the second terminal device is the TUE, which is the final receiving end of the data sent by the network device, that is, the data sent by the network device will be terminated at the second terminal device.
  • the network device When the network device has downlink data that needs to be sent to the TUE, it can first send the downlink data to the CUE. After the CUE receives the downlink data from the network device, it sends the downlink data to the TUE.
  • the network device can also send control information for scheduling downlink data to the CUE through the search space, so that the CUE can receive the downlink data sent by the network device on the resource indicated by the control information to assist the network device in sending downlink data to the TUE .
  • the network equipment also needs to send search space information to the CUE, so that the CUE can perform blind detection in the search space, receive the PDCCH in the search space, and obtain control information from it.
  • the network device sends a first message to the CUE (for example, the first terminal device), and the first message includes information of the first search space, for example, the first information described in the embodiment of the present application.
  • the first information may include the identification of the first search space (SearchSpace ID), the control resource set ID (controlResourceSetId) of the control resource set (CORESET) corresponding to the first search space, and the correspondence of the first search space
  • searchSpace ID the identification of the first search space
  • controlResourceSetId controlResourceSetId
  • CORESET controlResourceSetId
  • the index of the control resource set can be determined according to the control resource set ID.
  • the corresponding control information format of the first search space refers to the format of the DCI carried by the PDCCH transmitted in the first search space.
  • the DCI format in a piece of information can be a DCI format dedicated to cooperative transmission.
  • the DCI of this format is the DCI sent by the network device to the terminal devices in the cooperative group in the cooperative transmission scenario;
  • the first search space corresponds to The control resource set of refers to the control resource set where the first search space is located;
  • the aggregation level L corresponding to the first search space refers to the aggregation level of the PDCCH transmitted in the first search space.
  • the first message is a radio resource control (radio resource control, RRC) message.
  • RRC radio resource control
  • the first message may also indicate the cooperation group in which the first terminal device and the second terminal device are located, for example, the first cooperation group described in the embodiment of the present application.
  • the second information in the first message is used to indicate the first collaboration group identifier, and the first collaboration group identifier is the identifier of the first collaboration group.
  • the first cooperation group identifier may be a radio network temporary identifier RNTI, and the first cooperation group identifier may reuse the RNTI of the second terminal device, that is, the first cooperation group identifier is the same as the RNTI of the second terminal device.
  • RNTI radio network temporary identifier
  • the first cooperation group identifier is different from the RNTI of the first terminal device and is different from the RNTI of the second terminal device.
  • the public search space is associated with the collaboration group identifier
  • the terminal device only needs to perform a blind check in the search space associated with the collaboration group, and can obtain group-level control information sent by the network device, for example, collaboration The DCI of the group.
  • a terminal device performs blind detection in all public search spaces and all UE-specific search spaces of the terminal device. The method provided in the embodiments of the present application greatly reduces the complexity of blind detection of the terminal device.
  • the group-level control information refers to the control information received by each terminal device in the cooperation group.
  • the CUE and TUE in the assisting group both receive the group-level control information sent by the network device.
  • the common search space and the cooperation group identifier are configured through an IE (information element) of the RRC message.
  • the second information and the first information are in the same IE of the first message.
  • the network device may also be configured with a search space dedicated to the collaboration group.
  • the group-level control information is transmitted through the search space dedicated to the collaboration group.
  • the network device transmits the PDCCH through the search space dedicated to the cooperation group, and the control information carried by the PDCCH is used to schedule the downlink data of the TUE.
  • the cooperative group-specific search space and the cooperative group identifier are configured through a piece of the RRC message, or the cooperative group-specific search space and the cooperative group identifier are configured through different IEs of the RRC message. It is understandable that the second information and the first information may be in the same IE of the first message, or may be in different IEs of the first message, which is not limited in the embodiment of the present application.
  • the first search space described in this embodiment of the application may be a search space dedicated to the first cooperation group, and the first terminal device may blindly check in the search space dedicated to the first cooperation group to try to obtain and schedule the second terminal Control information of the device's downlink data.
  • Step 502 The first terminal device obtains first control information from the first search space according to the first information and the second information, where the first control information is used to schedule the second terminal device Downlink data.
  • the first terminal device may receive the first control information in the first search space indicated by the first information, and the first control information shown is scrambled by the first cooperation group identifier. Further, the first terminal device may also determine the first cooperation group identifier according to the second information, and descramble the first control information according to the first cooperation group identifier.
  • the first terminal device may determine the CCEs occupied by the first search space according to the first information, perform blind detection on these CCEs, and try to receive the first control information sent by the network device.
  • the first terminal device may determine the CCE occupied by the first search space according to the "control resource set ID” and the “aggregation level L" in the first information.
  • the "control resource set index p" is determined according to the "control resource set ID”
  • the "control resource set index p" and "aggregation level L” are substituted into the above formula (1) to determine the CCE occupied by the first search space.
  • the first terminal device may also perform blind detection on CCEs occupied in the first search space according to the DCI format in the first information to obtain the first control information.
  • the format of the control information received by the first terminal device on the CCE occupied by the first search space is the format indicated by the DCI format in the first information, and the first terminal device determines that the control information is sent by the network device to itself Yes, otherwise the first terminal device can discard the received control information and continue blind detection.
  • the first terminal device may also descramble the first control information according to the cooperation group identifier indicated by the second information (for example, the first cooperation group identifier described in the embodiment of this application), and determine the time-frequency resource indicated by the first control information, so that The downlink data of the second terminal device sent by the network device is received on the time-frequency resource indicated by the first control information, so as to assist the network device in sending the downlink data to the second terminal device.
  • the cooperation group identifier indicated by the second information for example, the first cooperation group identifier described in the embodiment of this application
  • the method shown in FIG. 5 further includes:
  • Step 503 The first terminal device receives the downlink data of the second terminal device from the network device according to the first control information.
  • Step 504 The first terminal device forwards the downlink data received from the network device to the second terminal device.
  • the first terminal device further forwards the downlink data received according to the first control information to the second terminal device through the communication link with the second terminal device.
  • the communication link between the first terminal device and the second terminal device may be a V2X link, a D2D link, an unlicensed spectrum link, or a WiFi link.
  • the forwarding mode adopted by the first terminal device may be amplify-and-forward (AF), decode-and-forward (DF), and so on.
  • AF forwarding refers to that the first terminal device amplifies the power of the analog signal carrying the downlink data and then forwards it.
  • DF forwarding means that the first terminal device obtains a data packet from the time-frequency resource indicated by the first control information, and after descrambling the data packet to obtain a transfer block (TB) according to the first cooperation group identifier, it forwards the obtained TB To the second terminal device.
  • the network device can also indicate through the RRC message that the DCI format is dedicated control information for cooperative transmission, so that the terminal device can perform blind detection in the search space according to the DCI format indicated by the network device, for example, when the terminal When the device detects the control information in the special format for cooperative transmission in the search space indicated by the RRC message, it stops blind detection.
  • the first message may also include third information, and the third information is used to indicate a control information format dedicated to coordinated transmission.
  • the network device may determine the control information format dedicated to cooperative transmission according to the third information.
  • the control information of this format is detected in the first search space (for example, the first control information described in the embodiment of this application), it stops in the first search space. Blind detection of search space.
  • the network device when the network device transmits the control information through the search space dedicated to the cooperation group, the network device can configure the offset of the search space dedicated to the cooperation group relative to the public search space through the RRC message.
  • the first information in the first message includes a first offset and information of a common search space
  • the first offset is an offset between the first search space and the common search space.
  • the first terminal device may determine the search space dedicated to the first collaboration group based on the first offset and the information of the public search space, for example, the first search space described in the embodiment of the present application.
  • a field can be added to the searchSpaceType of the RRC message to define a search space dedicated to the collaboration group.
  • This field is parallel to the common field and the ue-Specific field, and this field can include dci-Format-for-UC.
  • You can also add a field in the searchSpaceType to indicate the offset of the search space dedicated to the collaboration group relative to the public search space, and this field is juxtaposed with other fields in the searchSpaceType.
  • add a field in SearchSpace to indicate the offset of the search space dedicated to the collaboration group relative to the public search space, and this field is juxtaposed with other fields in the SearchSpace.
  • ue-cooperation is used to define the search space dedicated to the collaboration group
  • offsetToCSS is used to indicate the offset between the search space dedicated to the collaboration group and the public search space
  • dci-Format-for-UC is used to indicate the control dedicated to collaboration Information format.
  • the second information can be added to the common field of the searchSpaceType field of the RRC message.
  • the specific implementation of the second information in the standard can be as follows:
  • third information may be added to the common field of the searchSpaceType field of the RRC message, and the third information may be juxtaposed with the existing dci-Format under the common field.
  • the specific implementation of the "dci-Format-for-UC" field in the standard of the collaboration-specific control information format can be as follows:
  • the embodiment of the present application provides a communication method.
  • a network device can transmit and coordinately transmit dedicated control information through a public search space. As shown in FIG. 6, the method includes the following steps:
  • the base station sends an RRC message to the TUE and CUE.
  • the TUE and the CUE are terminal devices in the same cooperative group, and the CUE can assist the base station to send data to the TUE.
  • One IE of the RRC message includes the identification UC-RNTI of the cooperative group in which the TUE and the CUE are located, and the information of the common search space.
  • the information of the public search space may be: the SearchSpace ID of the public search space, the format of the DCI carried by the PDCCH transmitted in the public search space, the aggregation level of the PDCCH transmitted in the public search space, and the control resource set ID corresponding to the public search space.
  • the RRC message may be regarded as the first message described in the embodiment of the present application.
  • the base station sends the PDCCH in the common search space, and the DCI carried by the PDCCH is scrambled with the UC-RNTI, which is the identity of the cooperation group.
  • the CUE performs blind detection in the public search space according to the information of the public search space in the RRC message to obtain DCI.
  • the CUE may determine the index p of the control resource set according to the control resource set IE corresponding to the common search space, the CUE may determine the CCE occupied by the common search space according to the aggregation level indicated by the IE and the control resource set index p, and may also determine the CCE occupied by the common search space according to the cooperation group Identifies the DCI obtained by UC-RNTI descrambling in the public search space.
  • the base station sends downlink data to the CUE through a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the CUE receives downlink data on the PDSCH according to the DCI.
  • the CUE receives the downlink data sent by the base station on the time-frequency resource indicated by the DCI, where the downlink data is the downlink data of the TUE.
  • the CUE sends the downlink data received from the base station to the TUE.
  • a network device can transmit control information dedicated to cooperative transmission through a search space dedicated to a collaboration group (hereinafter referred to as a "dedicated search space"). As shown in FIG. 7, the method includes the following steps:
  • the base station sends an RRC message to the TUE and CUE.
  • the TUE and the CUE are terminal devices in the same cooperative group, and the CUE can assist the base station to send data to the TUE.
  • An IE of the RRC message includes the identification UC-RNTI of the cooperation group where the TUE and the CUE are located and the information of the dedicated search space, or the identification UC-RNTI of the cooperation group and the information of the dedicated search space are in the RRC message The different IE.
  • the RRC message may be regarded as the first message described in the embodiment of the present application.
  • the information of the dedicated search space may be: the offset of the dedicated search space relative to the public search space, the format of the DCI carried by the PDCCH transmitted in the dedicated search space, the aggregation level of the PDCCH transmitted in the dedicated search space, and the control resources corresponding to the dedicated search space Set ID, etc.
  • the base station sends the PDCCH in the dedicated search space, and the DCI carried by the PDCCH is scrambled with the UC-RNTI of the cooperation group.
  • the CUE performs blind detection in the dedicated search space according to the information of the dedicated search space in the RRC message to obtain DCI.
  • the CUE can determine the CCE occupied by the dedicated search space according to the aggregation level indicated by the IE, the control resource set ID, and the offset of the dedicated search space from the public search space, and can also descramble the dedicated search space according to the cooperation group identifier UC-RNTI.
  • the DCI obtained by the search space.
  • the base station sends downlink data of the TUE to the CUE through the PDSCH.
  • the CUE receives downlink data on the PDSCH according to the DCI.
  • the CUE receives the downlink data sent by the base station on the time-frequency resource indicated by the DCI, where the downlink data is the downlink data of the TUE.
  • the CUE sends the downlink data received from the base station to the TUE.
  • the protocol defines the offset ⁇ UC between the search space dedicated to the collaboration group and the public search space. Then on the basis of the aforementioned formula (1), the search space dedicated to the collaboration group satisfies the following formula (2):
  • ⁇ UC is a non-zero integer
  • a parameter n UC is added to the aforementioned formula (1), and the protocol defines the value or value range of this parameter, or the parameter is determined according to the cooperation group identifier UC-RNTI, for example, the The parameter is a function of the cooperation group identification UC-RNTI.
  • the search space dedicated to the collaboration group satisfies the following formula (3):
  • n UC is added to the formula, and the parameter n UC is configured through an RRC message.
  • the search space dedicated to the cooperation group satisfies the following formula (4):
  • the CUE can determine the index p of the control resource set according to the control resource set ID corresponding to the dedicated search space, and can also calculate the offset ⁇ UC between the dedicated search space and the public search space, and the control resource corresponding to the dedicated search space
  • the index p of the set and the aggregation level L of the PDCCH transmitted by the dedicated search are substituted into the above formula (2), (3) or (4) to determine the CCE occupied by the dedicated search space, thereby performing blind detection on the CCE occupied by the dedicated search space to obtain scheduling DCI of TUE downlink data.
  • FIG. 8 shows a possible structural schematic diagram of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 8 may be the first terminal device described in the embodiment of the present application, may also be a component in the terminal device that implements the foregoing method, or may also be a chip applied to the terminal device.
  • the chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.
  • the communication device includes a processing unit 801 and a communication unit 802.
  • the processing unit may be one or more processors, and the communication unit may be a transceiver.
  • the processing unit 801 is configured to support the first terminal device to perform step 503 and/or other processes used in the technology described herein.
  • the communication unit 802 is configured to support communication between the first terminal device and other communication devices, for example, to support the terminal device to perform step 504, and/or other processes used in the technology described herein.
  • the communication device includes: a processing module 901 and a communication module 902.
  • the processing module 901 is used to control and manage the actions of the communication device, for example, to execute the steps executed by the above-mentioned processing unit 801, and/or to execute other processes of the technology described herein.
  • the communication module 902 is configured to execute the steps performed by the above-mentioned communication unit 802, and support interaction between the communication device and other devices, such as interaction with other terminal equipment devices.
  • the communication device may further include a storage module 903, and the storage module 903 is used to store the program code and data of the communication device.
  • the processing module 901 is a processor
  • the communication module 902 is a transceiver
  • the storage module 903 is a memory
  • the communication device is the communication device shown in FIG. 4a.
  • FIG. 10 shows a possible schematic diagram of the structure of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 10 may be the network device described in the embodiment of the present application, may also be a component in the network device that implements the foregoing method, or may also be a chip applied to the network device.
  • the chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.
  • the communication device includes a processing unit 1001 and a communication unit 1002.
  • the processing unit 1001 may be one or more processors, and the communication unit 1002 may be a transceiver.
  • the processing unit 1001 is configured to support the network device to perform internal processing, for example, to support the network device to determine the first information and the second information, and/or other processes used in the technology described herein.
  • the communication unit 1002 is used to support communication between the network device and other communication devices, for example, to support the network device to perform step 501, and/or other processes used in the technology described herein.
  • the communication device includes: a processing module 1101 and a communication module 1102.
  • the processing module 1101 is used to control and manage the actions of the communication device, for example, to perform the steps performed by the above-mentioned processing unit 1001, and/or to perform other processes of the technology described herein.
  • the communication module 1102 is used to perform the steps performed by the above-mentioned communication unit 1002, and supports interaction between the communication device and other devices, such as interaction with other network equipment devices.
  • the communication device may further include a storage module 1103, and the storage module 1103 is used to store the program code and data of the communication device.
  • the processing module 1101 is a processor
  • the communication module 1102 is a transceiver
  • the storage module 1103 is a memory
  • the communication device is the communication device shown in FIG. 4b.
  • the embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores instructions; the instructions are used to execute the method shown in FIG. 5.
  • the embodiment of the present application provides a computer program product including instructions, which when running on a communication device, causes the communication device to execute the method shown in FIG. 5.
  • a wireless communication device in an embodiment of the present application includes: instructions stored in the wireless communication device; when the wireless communication device runs on the communication device shown in FIG. 4a, FIG. 4b, and FIG. 8 to FIG. The method shown in Figure 5.
  • the wireless communication device may be a chip.
  • the embodiment of the present application also provides a communication system, including: a terminal device and a network device.
  • the terminal device may be the communication device shown in FIG. 4a, FIG. 8, and FIG. 9, and the network device may be the communication device shown in FIG. 4b, FIG. 10, and FIG. 11.
  • the processor in the embodiment of the present application may include but is not limited to at least one of the following: central processing unit (CPU), microprocessor, digital signal processor (DSP), microcontroller (microcontroller unit, MCU) ), or various computing devices running software such as artificial intelligence processors.
  • Each computing device may include one or more cores for executing software instructions for calculation or processing.
  • the processor can be a single semiconductor chip, or it can be integrated with other circuits to form a semiconductor chip. For example, it can form an SoC (on-chip) with other circuits (such as codec circuits, hardware acceleration circuits, or various bus and interface circuits).
  • the processor may further include necessary hardware accelerators, such as field programmable gate array (FPGA) and PLD (programmable logic device) , Or a logic circuit that implements dedicated logic operations.
  • FPGA field programmable gate array
  • PLD programmable logic device
  • the memory in the embodiments of the present application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory , RAM) or other types of dynamic storage devices that can store information and instructions, and may also be electrically erasable programmable read-only memory (EEPROM).
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , A magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • a magnetic disk storage medium or other magnetic storage device or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • At least one refers to one or more.
  • Multiple means two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • the disclosed database access device and method can be implemented in other ways.
  • the embodiments of the database access device described above are merely illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or The components can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, database access devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (may be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请实施例公开了一种通信方法及通信装置，涉及通信领域，能够降低协作传输场景下终端设备的盲检复杂度，可以应用于设备到设备(device-to-device，D2D)或车联网(vehicle-to-everything，V2X)等领域。所述方法包括：第一终端设备从网络设备接收第一消息，所述第一消息包括第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备；所述第一终端设备根据所述第一信息和所述第二信息从所述第一搜索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。

Description

一种通信方法及通信装置 技术领域
本申请实施例涉通信领域，尤其涉及一种通信方法及通信装置。
背景技术
第五代(the fifth generation，5G)通信系统支持各种新的无线业务类型，例如物联网、自动驾驶等。5G通信系统还支持用户协作传输，通过用户协作传输可以显著提高通信系统的容量以及网络的覆盖范围，还可以降低基站端的负载。
现有技术中，基站可以通过搜索空间传输物理下行控制信道(physical downlink control channel，PDCCH)，终端设备可以在搜索空间进行盲检测，获取PDCCH上承载的下行控制信息(downlink control information，DCI)。现有的搜索空间分为公共搜索空间和用户设备(user equipment，UE)特定的搜索空间。
在协作传输场景下，基站DCI可以使用协作组的标识加扰DCI，终端设备可以根据协作组的标识在所有公共搜索空间、该终端设备所有的UE特定的搜索空间进行盲检，获取基站发送的DCI，终端设备盲检的复杂度较高。
发明内容
本申请实施例提供一种通信方法及通信装置，能够降低协作传输场景下终端设备盲检的复杂度。
第一方面，提供了一种通信方法，所述方法包括：第一终端设备从网络设备接收第一消息，第一消息包括第一信息以及第二信息；第一信息用于指示第一搜索空间，第二信息用于指示第一协作组标识，其中，第一协作组包括第一终端设备和第二终端设备；第一终端设备根据第一信息和第二信息从第一搜索空间获取第一控制信息，第一控制信息用于调度第二终端设备的下行数据，或者说第一控制信息用于指示第二终端设备的下行数据。需要说明的是，第二终端设备的下行数据指的是该下行数据的目的地址为第二终端设备。本申请中描述的，终端设备的下行数据均表示该下行数据的目的地址为该终端数据，后文不再赘述。
本申请实施例提供的方法中，终端设备可以通过一条消息获取网络设备配置的协作组标识以及搜索空间(例如，本申请实施例所述的第一搜索空间)，进而根据协作组的标识在该消息配置的搜索空间中进行盲检获取网络设备发送的下行控制信息。相比于现有技术，本申请实施例提供的方法通过第一消息将协作组和搜索空间关联，终端设备无需在所有公共搜索空间、该终端设备所有的UE特定的搜索空间进行盲检，只需要根据协作组的标识在网络设备指示的第一搜索空间进行盲检就可以获取到网络设备发送的下行控制信息，大大降低了终端设备的盲检复杂度。
结合第一方面，在第一方面的第一种可能的实现方式中，所述方法还包括：第一终端设备根据第一控制信息从网络设备接收第二终端设备的下行数据；第一终端设备向第二终端设备转发从网络设备接收的下行数据。
本申请实施例提供的方法中，第一终端设备可以根据从搜索空间获取到的控制信 息接收网络设备发送的下行数据，协助网络设备向第二终端设备转发下行数据。终端设备通过搜索空间获取下行控制信息，提高了协作传输场景下的传输安全性。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，第一搜索空间为公共搜索空间，或，第一搜索空间为第一协作组专用的搜索空间。
本申请实施例提供还提供了用于协作传输场景的搜索空间的可能示例，可以利用现有的公共搜索空间传输协作传输场景下的DCI，无需定义新的搜索空间。
也可以定义专用于协作传输场景的搜索空间，专用的搜索空间用于传输某个协作组相关的DCI。专用的搜索空间仅用于传输协作组中终端设备的控制信息，相比于通过公共搜索空间传输协作组相关的控制信息，减少了控制信道的碰撞。
结合第一方面或第一方面的第一或第二种可能的实现方式，在第一方面的第三种可能的实现方式中，第二信息与第一搜索空间关联。
本申请实施例中，当第一搜索空间是公用搜索空间，可以在RRC消息(例如，本申请实施例所述的第一消息)的一条IE中配置第一搜索空间以及协作组的标识，可以理解的是，第二信息与第一搜索空间是关联的，第一搜索空间可以用于传输第二信息所指示的协作组相关的DCI。通过将第一搜索空间和协作组关联，终端设备只需要在协作组专用的搜索空间进行盲检，可以获取网络设备发送的DCI，降低了盲检的复杂度。
结合第一方面或第一方面的第一至第三种可能的实现方式中的任意一种，在第一方面的第四种可能的实现方式中，第一终端设备根据第一信息和第二信息从第一搜索空间获取第一控制信息，包括：第一终端设备在第一信息指示的第一搜索空间接收由第一协作组标识加扰的第一控制信息；第一终端设备根据第二信息解扰由第一协作组标识加扰的第一控制信息。
本申请实施例还提供了第一终端设备根据第一信息和第二信息从第一搜索空间获取控制信息的具体实现。网络设备在一个搜索空间发送控制信息，协作组中的终端设备均可以从一个搜索空间获取到网络设备发送的下行控制信息，节省了信令开销。
结合第一方面或第一方面的第一至第四种可能的实现方式中的任意一种，在第一方面的第五种可能的实现方式中，第一控制信息的格式为协作传输专用的。
本申请实施例中，可以定义一种专用于协作传输的控制信息，网络设备可以通过搜索空间传输这种格式的控制信息。现有的控制信息格式可能满足不了协作传输的需求，定义协作传输专用的控制信息，能够更好地进行协作传输。
结合第一方面或第一方面的第一至第五种可能的实现方式中的任意一种，在第一方面的第六种可能的实现方式中，第一消息还包括第三信息，第三信息用于指示协作传输专用的控制信息格式。
本申请实施例中，终端设备还可以通过网络设备发送的RRC消息(例如，本申请实施例所述的第一消息)确定第一控制信息的格式。控制信息的格式不同，控制信息的payload(载荷)大小不同，终端设备根据第一控制信息的格式进行盲检，通过这种格式相应的payload大小判断是否接收到第一控制信息。当接收到的消息的payload大小与协作传输专用的控制信息格式相应的payload大小匹配，则确定通过第一搜索空 间接收到了第一控制信息。
结合第一方面或第一方面的第一至第六种可能的实现方式中的任意一种，在第一方面的第七种可能的实现方式中，第一协作组标识为无线网络临时标识RNTI；其中，第一协作组标识与第一终端设备的RNTI、第二终端设备的RNTI不同；或，第一协作组标识与第二终端设备的RNTI相同。
本申请实施例提供了协作组标识的可能实现方式，协作组标识可以是RNTI，但是不同于CUE、TUE的RNTI。给协作组分配专用的RNTI，可以避免与终端设备的RNTI产生混淆。或者，协作组标识也可以是TUE的RNTI，不需要额外配置协作组标识，可以节省RNTI的可用序列值。
结合第一方面或第一方面的第一至第七种可能的实现方式中的任意一种，在第一方面的第八种可能的实现方式中，第一信息包括第一偏移量以及公共搜索空间的信息，第一偏移量为第一搜索空间与公共搜索空间之间的偏移量。
本申请实施例中，当网络设备通过协作组专用的搜索空间传输控制信息时，终端设备可以根据第一偏移量和公共搜索空间的信息，准确确定协作组专用的搜索空间。
第二方面，提供了一种通信方法，所述方法包括：网络设备第一信息以及第二信息；第一信息用于指示第一搜索空间，第二信息用于指示第一协作组标识，其中，第一协作组包括第一终端设备和第二终端设备；网络设备向第一终端设备发送第一消息，所述第一消息包括所述第一信息和所述第二信息。
结合第二方面，在第二方面的第一种可能的实现方式，第一搜索空间为公共搜索空间，或，第一搜索空间为第一协作组专用的搜索空间。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，第二信息与第一搜索空间关联。
结合第二方面或第二方面的第一或第二种可能的实现方式，在第二方面的第三种可能的实现方式中，第一控制信息的格式为协作传输专用的。
结合第二方面或第二方面的第一至第三种可能的实现方式，在第二方面的第四种可能的实现方式中，第一消息还包括第三信息，第三信息用于指示协作传输专用的控制信息格式。
结合第二方面或第二方面的第一至第四种可能的实现方式，在第二方面的第五种可能的实现方式中，第一协作组标识为无线网络临时标识RNTI；其中，第一协作组标识与第一终端设备的RNTI、第二终端设备的RNTI不同；或，第一协作组标识与第二终端设备的RNTI相同。
结合第二方面或第二方面的第一至第五种可能的实现方式，在第二方面的第六种可能的实现方式中，第一信息包括第一偏移量以及公共搜索空间的信息，第一偏移量为第一搜索空间与公共搜索空间之间的偏移量。
第三方面，提供了一种通信装置，包括：通信单元，用于从网络设备接收第一消息，所述第一消息包括第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备；处理单元，用于根据所述第一信息和所述第二信息从所述第一搜 索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据，或者说所述第一控制信息用于指示所述第二终端设备的下行数据。
结合第三方面，在第三方面的第一种可能的实现方式中，所述处理单元还用于，根据所述第一控制信息通过所述通信单元从所述网络设备接收所述第二终端设备的下行数据；所述通信单元还用于，向所述第二终端设备转发所述下行数据。
结合第三方面或第三的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
结合第三方面或第三方面或第三方面的第一或第二种可能的实现方式，在第三方面的第三种可能的实现方式中，所述第二信息与所述第一搜索空间关联。
结合第三方面或第三方面或第三方面的第一至第三种可能的实现方式中的任意一种，在第三方面的第四种可能的实现方式中，所述处理单元具体用于，在所述第一信息指示的所述第一搜索空间通过所述通信单元接收由所述第一协作组标识加扰的所述第一控制信息；所述处理单元还用于，根据所述第二信息解扰由所述第一协作组标识加扰的所述第一控制信息。
结合第三方面或第三方面或第三方面的第一至第四种可能的实现方式中的任意一种，在第三方面的第五种可能的实现方式中，所述第一控制信息的格式为协作传输专用的。
结合第三方面或第三方面或第三方面的第一至第五种可能的实现方式中的任意一种，在第三方面的第六种可能的实现方式中，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
结合第三方面或第三方面或第三方面的第一至第六种可能的实现方式中的任意一种，在第三方面的第七种可能的实现方式中，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，所述第一协作组标识与所述第二终端设备的RNTI相同。
结合第三方面或第三方面或第三方面的第一至第七种可能的实现方式中的任意一种，在第三方面的第八种可能的实现方式中，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
第四方面，提供了一种通信装置，包括：处理单元，用于第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备；通信单元，用于向所述第一终端设备发送第一消息，所述第一消息包括第一信息和第二信息。
结合第四方面，在第四方面的第一种可能的实现方式中，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
结合第四方面或第四方面的第一种可能的实现方式中，在第四方面的第二种可能的实现方式中，所述第二信息与所述第一搜索空间关联。
结合第四方面或第四方面的第一或第二种可能的实现方式中，在第四方面的第三种可能的实现方式中，所述第一控制信息的格式为协作传输专用的。
结合第四方面或第四方面的第一至第三种可能的实现方式中的任意一种，在第四 方面的第四种可能的实现方式中，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
结合第四方面或第四方面的第一至第四种可能的实现方式中的任意一种，在第四方面的第五种可能的实现方式中，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，所述第一协作组标识与所述第二终端设备的RNTI相同。
结合第四方面或第四方面的第一至第五种可能的实现方式中的任意一种，在第四方面的第六种可能的实现方式中，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
需要说明的是，当上述通信装置是网络设备、终端设备或可实现上述网络设备、终端设备功能的组合器件时，通信单元可以是收发器，可以包括天线和射频电路等，收发器可以是整合的发送器和接收器，处理模块可以是处理器，例如基带芯片等。当通信装置是具有上述网络设备、终端设备功能的部件时，通信单元可以是射频单元，处理模块可以是处理器。当通信装置是芯片系统时，通信单元可以是芯片系统的输入输出接口，处理模块可以是芯片系统的处理器，例如：中央处理单元(central processing unit，CPU)。
第五方面，提供了一种通信装置，包括至少一个处理器和存储器，所述至少一个处理器与所述存储器耦合；所述存储器，用于存储计算机程序；
所述至少一个处理器，用于执行所述存储器中存储的计算机程序，以使得所述装置执行如上述第二方面以及第二方面任意一种实现方式所述的方法，或，上述第一方面以及第一方面任意一种实现方式所述的方法。
第六方面，提供了一种计算机可读存储介质，包括：计算机可读存储介质中存储有指令；当计算机可读存储介质在上述第三方面以及第三方面任意一种实现方式、第六方面以及第六方面任意一种实现方式所述的通信装置上运行时，使得通信装置执行如上述第一方面以及第一方面任意一种实现方式所述的通信方法。
第七方面，提供了一种计算机可读存储介质，包括：计算机可读存储介质中存储有指令；当计算机可读存储介质在上述第四方面以及第四方面任意一种实现方式所述的通信装置上运行时，使得通信装置执行如上述第二方面以及第二方面任意一种实现方式所述的通信方法。
第八方面，提供了一种无线通信装置，该通信装置包括处理器，例如，应用于通信装置中，用于实现上述第一方面以及第一方面任意一种实现方式所述的方法，该通信装置例如可以是芯片系统。在一种可行的实现方式中，所述芯片系统还包括存储器，所述存储器，用于保存实现上述第一方面所述方法的功能必要的程序指令和数据。
第九方面，提供了一种无线通信装置，该通信装置包括处理器，例如，应用于通信装置中，用于实现上述第二方面以及第二方面任意一种实现方式所述的方法所涉及的功能或方法，该通信装置例如可以是芯片系统。在一种可行的实现方式中，所述芯片系统还包括存储器，所述存储器，用于保存实现上述第二方面所述方法的功能必要的程序指令和数据。
上述方面中的芯片系统可以是片上系统(system on chip，SOC)，也可以是基带 芯片等，其中基带芯片可以包括处理器、信道编码器、数字信号处理器、调制解调器和接口模块等。
第十方面，提供了一种通信系统，包括网络设备、第一终端设备以及第二终端设备。
网络设备用于确定第一信息以及第二信息；第一信息用于指示第一搜索空间，第二信息用于指示第一协作组标识，其中，第一协作组包括第一终端设备和第二终端设备；
网络设备还用于，向第一终端设备发送第一消息，所述第一消息包括第一信息和第二信息；
第一终端设备用于，从网络设备接收第一消息，根据第一信息和第二信息从第一搜索空间获取第一控制信息，第一控制信息用于调度第二终端设备的下行数据，或者说第一控制信息用于指示第二终端设备的下行数据；
第一终端设备还用于，根据第一控制信息接收第二终端设备的下行数据，向第二终端设备发送所述下行数据。
终端设备的具体执行过程可参照上述第一方面以及第一方面的任意一种可能的实现方式，在此不做赘述。网络设备的具体执行过程可参照上述第二方面以及第二方面的任意一种可能的实现方式，在此不做赘述。
附图说明
图1为本申请实施例提供的协作传输场景的示意图；
图2为本申请实施例提供的协作传输场景的另一示意图；
图3为本申请实施例提供的通信系统的示意图；
图4a为本申请实施例提供的通信装置的结构框图；
图4b为本申请实施例提供的通信装置的另一结构框图；
图5为本申请实施例提供的通信方法的流程示意图；
图6为本申请实施例提供的通信方法的另一流程示意图；
图7为本申请实施例提供的通信方法的另一流程示意图；
图8～图11为本申请实施例提供的通信装置的另一结构框图。
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。
首先，对本申请实施例涉及的术语进行解释说明。
(1)用户协作传输
用户协作传输指的是一个终端设备协助另一个终端设备完成数据传输，可以显著提高系统容量以及网络覆盖范围。例如，终端设备1处于覆盖较弱的小区边缘，基站可以将数据发送给强覆盖区域的终端设备2，由终端设备2将数据转发给终端设备1。
图1是下行用户协作传输的一种场景。基站可以向协作用户设备(cooperation user equipment，CUE)和目标用户设备(target user equipment，TUE)发送数据。CUE可以将接收到的数据通过侧行链路(sidelink)发送给TUE。TUE可以对来自基站的数据、来自CUE的数据进行联合解码，提高数据接收性能。
例如，参考图1，基站准备需要向TUE发送的数据，向TUE、CUE1、CUE2发送 该数据，CUE1、CUE2将接收到的数据发送给TUE，TUE可以对来自基站的数据、来自CUE1的数据、来自CUE2的数据进行联合解码。
图2是下行用户协作传输的另一种场景。基站仅向CUE发送数据，CUE可以将接收到的数据通过侧行链路发送给TUE，TUE从CUE接收数据。
例如，参考图2，基站准备需要向TUE发送的数据，向CUE1、CUE2发送该数据，CUE1、CUE2将接收到的数据发送给TUE，TUE可以对来自CUE1的数据、来自CUE2的数据进行联合解码。
在下行用户协作传输场景中，TUE和为其服务的若干个CUE构成一个用户协作组(cooperation user group，UC group)，例如图1或者图2中的TUE和CUE1、CUE2构成一个用户协作组。需要说明的是，一个用户协作组只包括一个TUE。对于一个UE而言，其可以是某个用户协作组中的TUE，同时也可以是其他用户协作组中的CUE。在同一小区中，可以存在多个不同的用户协作组。
(2)RNTI(Radio Network Temporary Identifier，无线网络临时标识)
RNTI是用户设备和基站之间约定的用于区分不同用户设备的标识，可以通过RNTI区分不同的用户设备。C-RNTI(cell-RNTI)是一种常见的RNTI，可以代表用户设备的业务信息。
(3)物理下行控制信道(physical downlink control channel，PDCCH)
通常，终端设备无论是接收下行数据还是发送上行数据都需要网络设备的调度，网络设备可以利用PDCCH对终端设备的上行数据或下行数据进行调度，例如，PDCCH可以承载下行控制信息(downlink control information，DCI)，终端设备可以根据DCI接收物理下行数据信道(physical downlink，PDSCH)；或者，根据DCI发送物理上行数据信道(physical uplink，PUSCH)。
DCI有多种格式(format)。DCI可以指示小区级的信息，也可以指示UE级的信息。其中，小区级的信息是小区下所有UE通用的信息，UE级的信息仅仅适用于某个UE，对小区下的其他UE并不适用。一个PDCCH只能携带一个某种format的DCI，一个PDCCH在n个连续的控制信道元素(control channel element，CCE)上传输，每个CCE由一定数量的资源元组(resource element group，REG)组成。PDCCH承载的DCI的format不同，PDCCH的聚合等级(aggregation level，AL)可能不同。其中，聚合等级表示一个PDCCH占用的连续CCE的个数。示例的，DCI format{0,1,2,3}对应的聚合等级(AL)分别为{1,2,4,8}。
(4)搜索空间
终端设备在成功接收PDCCH之前需要监听一个候选PDCCH集合，即终端设备根据所要监听的DCI format(格式)尝试解码该集合中的每一个PDCCH。如果终端设备在监听过程中成功解码了候选PDCCH集合中的一个PDCCH，意味着终端设备成功接收了该PDCCH。
需要说明的是，上述候选PDCCH集合可以称为搜索空间。搜索空间分为公共搜索空间(common search space，CSS)和UE特定的搜索空间(UE-specific search space，USS)。现有技术中，公共搜索空间用于传输小区级别的DCI，小区下的所有UE都可以在公共搜索空间进行盲检，获取小区级别的DCI，例如，与Paging(寻呼)、随机 接入(Random Access，RA)响应(Response)、广播控制信道(broadcast control channel，BCCH)等相关的控制信息。
UE特定的搜索空间用于传输UE级别的DCI，只有某个UE能通过盲检获取基站向该UE发送的DCI。例如，与下行数据信道(downlink-shared channel，DL-SCH)、上行数据信道(uplink-shared channel，UL-SCH)等相关的控制信息。
基站可以通过无线资源控制(radio resource control，RRC)消息配置搜索空间相关的参数，例如，搜索空间索引、关联的控制资源集、PDCCH监测周期、每个PDCCH监测周期中PDCCH监测的持续时间、每个CCE聚合等级下的候选PDCCH数量、监测的DCI format等。终端设备可以根据搜索空间相关的参数，确定进行盲检的搜索空间。
此外，终端设备可以通过搜索空间占用的CCE来确定搜索空间。具体地，可以针对整个带宽上分布的CCE进行编号，从而确定某个搜索空间占用的CCE的索引。或者，可以在带宽上划分控制资源集(control resource set，CORESET)，针对一个CORESET上分布的CCE单独进行编号。搜索空间可以与某个CORESET关联，终端设备可以通过搜索空间占用的CCE在该CORESET上的索引确定搜索空间。
示例的，与CORESET p关联的搜索空间占用的CCE的索引满足以下公式(1)：
Figure PCTCN2019130190-appb-000001
其中，一种情况下，为了在主小区监测PDCCH，可以通过CrossCarrierSchedulingConfig为UE配置载波指示域。这种情况下n CI为载波指示域值，用于指示载波指示域；其它情况下，包括任意CSS的情况，n CI＝0；
Figure PCTCN2019130190-appb-000002
为时隙号，L为聚合等级，
Figure PCTCN2019130190-appb-000003
为搜索空间的索引。
当CORESET p关联的搜索空间为CSS，
Figure PCTCN2019130190-appb-000004
当CORESET p关联的搜索空间为USS，
Figure PCTCN2019130190-appb-000005
需要说明的是，Y p,-1＝n RNTI≠0,其中n RNTI的RNTI值是C-RNTI；当p mod3＝0，A p＝39827f；当p mod3＝1，A p＝39829；当p mod3＝2，A p＝39839；D＝65537；
i＝0,…,L-1；
N CCE,p是CORESET p关联的搜索空间占用的CCE的数量，CCE的编号从0至N CCE,p-1；
Figure PCTCN2019130190-appb-000006
其中对于载波指示域值n CI对应的主小区而言，
Figure PCTCN2019130190-appb-000007
是PDCCH candidate的数量，配置给UE用于监测聚合等级L的搜索空间集合s；
对于任意CSS，
Figure PCTCN2019130190-appb-000008
对于USS，
Figure PCTCN2019130190-appb-000009
是所有被配置n CI值的CCE聚合等级为L的搜索空间集合s的最大值。
(5)加扰
现有的单跳传输中，发送端可以利用一个伪随机码序列与待发送的数据相乘，对数据进行加扰，以加密数据防止数据在传输过程中被篡改。其中，所使用的伪随机码序列可以称为扰码序列。
以uu链路的下行传输为例，基站可以利用扰码序列加扰物理下行数据信道(physical downlink shared channel，PDSCH)上映射的数据。扰码序列是长度为31位的比特序列，具体由序列X1和序列X2相加后进行模2运算获得。其中，序列X1根据协议(3GPP TS 38.211)规定来确定，通常序列X1是不变的，序列X2的初始值可以根据c init＝n RNTI·2 15+q·2 14+n ID来确定。
其中，n RNTI是与PDSCH传输关联的RNTI，即接收PDSCH的终端的RNTI；
q的取值为0或1，q＝0时，基站采用单码字传输，即基站终端发送的数据包括一个传输块(transport block，TB)进行传输；q＝1时，基站采用两码字传输，即基站发送的数据包括两个传输块(transport block，TB)进行传输；
n ID为高层配置的参数dataScramblingIdentityPDSCH或
Figure PCTCN2019130190-appb-000010
其中，高层配置参数的取值为{0,1,…1023}，当配置了该参数，需要满足以下条件：RNTI等于C-RNTI、MCS-C-RNTI(modulation coding scheme cell RNTI)或CS-RNTI(configured scheduling RNTI)；且网络设备未使用DCI format 1_0在公共搜索空间调度终端设备的下行数据；其他条件下，
Figure PCTCN2019130190-appb-000011
是物理层小区ID，即发送PDSCH的基站的小区的ID。
图3给出了本申请提供的技术方案所适用的一种通信系统的示意图，该通信系统可以包括多个网络设备(仅示出了网络设备100)以及多个终端设备(图中仅示出了终端设备201和终端设备202)。图3仅为示意图，并不构成对本申请提供的技术方案的适用场景的限定。
其中，网络设备和终端设备之间可以通过蜂窝链路(Uu链路)进行上下行传输，终端设备之间可以通过侧行链路(sidelink链路)进行通信，例如D2D通信、V2X通信、机器类型通信(machine type communication，MTC)等。
网络设备100和终端设备之间还可以进行协作传输。例如，终端设备201和终端设备202可以构成一个用户协作组。在下行传输中，终端设备201作为CUE，终端设备202作为TUE。网络设备向终端设备201发送数据，终端设备201从网络设备接收数据后向终端设备202发送数据。在上行传输中，终端设备201作为CUE，终端设备202作为SUE。终端设备202向终端设备201发送数据，终端设备201从终端设备202接收数据后向网络设备发送数据。
网络设备100可以是任意一种具有无线收发功能的设备。包括但不限于：LTE中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，NR中的基站(gNodeB或gNB)或收发点(transmission receiving point/transmission reception point,TRP)，3GPP后续演进的基站，WiFi系统中的接入节点，无线中继节点，无线回传节点等。基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的TRP。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit,DU)。网络设备还可以是服务器，可穿戴设备，或车载设备等。以下以网络设备为基站为例进行说明。所述多个网络设备可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同技术的多个基站进行通信，例如，终端 设备可以与支持LTE网络的基站通信，也可以与支持5G网络的基站通信，还可以支持与LTE网络的基站以及5G网络的基站的双连接。
终端设备(例如终端设备201或终端设备202)是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、可穿戴终端设备等等。本申请的实施例对应用场景不做限定。终端有时也可以称为终端设备、用户设备(user equipment，UE)、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、终端设备、无线通信设备、UE代理或UE装置等。终端也可以是固定的或者移动的。本申请的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
在图1或图2所示的下行协作传输中，网络设备可以使用协作组的标识加扰下行控制信息，终端设备可以根据协作组的标识在所有公共搜索空间、该终端设备所有的UE特定的搜索空间进行盲检，获取基站发送的DCI，终端设备盲检的复杂度较高。
本申请实施例提供一种通信方法，第一终端设备(例如，CUE)从网络设备接收第一消息，所述第一消息包括第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备(例如，CUE)。所述第一终端设备还可以根据所述第一信息和所述第二信息从所述第一搜索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。CUE可以根据第一信息指示的搜索空间获取网络设备发送第二终端设备的下行数据的控制信息，从而可以从网络设备接收第二终端设备的下行数据，协助网络设备向第二终端设备发送下行数据。可见，本申请实施例提供的方法中，终端设备可以通过一条消息获取网络设备配置的协作组标识以及搜索空间(例如，本申请实施例所述的第一搜索空间)，进而根据协作组的标识在该消息配置的搜索空间中进行盲检获取网络设备发送的下行控制信息。相比于现有技术，终端设备无需在所有公共搜索空间、该终端设备所有的UE特定的搜索空间进行盲检，只需要根据协作组的标识在网络设备指示的第一搜索空间进行盲检就可以获取到网络设备发送的下行控制信息，大大降低了终端设备的盲检复杂度。
本申请实施例所述的终端设备，可以通过图4a中的通信装置410来实现。图4a所示为本申请实施例提供的通信装置410的硬件结构示意图。该通信装置410包括处理器4101、存储器4102以及至少一个通信接口(图4a中仅是示例性的以包括通信接口4103为例进行说明)。其中，处理器4101、存储器4102以及通信接口4103之间互相连接。
处理器4101可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信接口4103，可以是使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。
存储器4102可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路4102与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器4102用于存储执行本申请方案的计算机执行指令，并由处理器4101来控制执行。处理器4101用于执行存储器4102中存储的计算机执行指令，从而实现本申请下述实施例提供的意图处理方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器4101可以包括一个或多个CPU，例如图4a中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信装置410可以包括多个处理器，例如图4a中的处理器4101和处理器4106。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信装置410还可以包括输出设备4104和输入设备4105。输出设备4104和处理器4101通信，可以以多种方式来显示信息。例如，输出设备4104可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备4105和处理器4101通信，可以以多种方式接收用户的输入。例如，输入设备4105可以是鼠标、键盘、触摸屏设备或传感设备等。
上述的通信装置410可以是一个通用设备或者是一个专用设备。在具体实现中，通信装置410可以是台式机、便携式电脑、网络服务器、掌上电脑(personal digital assistant，PDA)、移动手机、平板电脑、无线终端装置、嵌入式设备或有图4a中类似结构的设备。本申请实施例不限定通信装置410的类型。
需要说明的是，通信装置410可以是终端整机，也可以是实现终端上的功能部件或组件，也可以是通信芯片，例如基带芯片等。通信装置410是终端整机时，通信接口可以是射频模块。当通信装置410为通信芯片，通信接口4103可以是该芯片的输入 输出接口电路，输入输出接口电路用于读入和输出基带信号。
图4b是一种通信装置的结构示意图。通信装置420的结构可以参考图4b所示的结构。
通信装置包括至少一个处理器4201、至少一个存储器4202、至少一个收发器4203、至少一个网络接口4204和一个或多个天线4205。处理器4201、存储器4202、收发器4203和网络接口4204相连。天线4205与收发器4203相连。网络接口4204用于使得通信装置通过通信链路，与其它通信设备相连，例如通信装置通过S1接口，与核心网网元相连。在本申请实施例中，所述连接可包括各类接口、传输线或总线等，本实施例对此不做限定。
本申请实施例中的处理器，例如处理器4201，可以包括如下至少一种类型：通用中央处理器(Central Processing Unit，CPU)、数字信号处理器(Digital Signal Processor，DSP)、微处理器、特定应用集成电路专用集成电路(Application-Specific Integrated Circuit，ASIC)、微控制器(Microcontroller Unit，MCU)、现场可编程门阵列(Field Programmable Gate Array，FPGA)、或者用于实现逻辑运算的集成电路。例如，处理器4201可以是一个单核(single-CPU)处理器或多核(multi-CPU)处理器。至少一个处理器4201可以是集成在一个芯片中或位于多个不同的芯片上。
本申请实施例中的存储器，例如存储器4202，可以包括如下至少一种类型：只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically erasable programmabler-only memory，EEPROM)。在某些场景下，存储器还可以是只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
存储器4202可以是独立存在，与处理器4201相连。可选的，存储器4202也可以和处理器4201集成在一起，例如集成在一个芯片之内。其中，存储器4202能够存储执行本申请实施例的技术方案的程序代码，并由处理器4201来控制执行，被执行的各类计算机程序代码也可被视为是处理器4201的驱动程序。例如，处理器4201用于执行存储器4202中存储的计算机程序代码，从而实现本申请实施例中的技术方案。
收发器4203可以用于支持通信装置与终端设备之间射频信号的接收或者发送，收发器4203可以与天线4205相连。具体地，一个或多个天线4205可以接收射频信号，该收发器4203可以用于从天线接收所述射频信号，并将射频信号转换为数字基带信号或数字中频信号，并将该数字基带信号或数字中频信号提供给所述处理器4201，以便处理器4201对该数字基带信号或数字中频信号做进一步的处理，例如解调处理和译码处理。此外，收发器4203可以用于从处理器4201接收经过调制的数字基带信号或数字中频信号，并将该经过调制的数字基带信号或数字中频信号转换为射频信号，并通过一个或多个天线4205发送所述射频信号。具体地，收发器4203可以选择性地对射频信号进行一级或多级下混频处理和模数转换处理以得到数字基带信号或数字中频信 号，所述下混频处理和模数转换处理的先后顺序是可调整的。收发器4203可以选择性地对经过调制的数字基带信号或数字中频信号时进行一级或多级上混频处理和数模转换处理以得到射频信号，所述上混频处理和数模转换处理的先后顺序是可调整的。数字基带信号和数字中频信号可以统称为数字信号。收发器可以称为收发电路、收发单元、收发器件、发送电路、发送单元或者发送器件等等。
需要说明的是，通信装置420可以是通信装置整机，也可以是实现通信装置功能的部件或组件，也可以是通信芯片。当通信装置420为通信芯片，收发器4203可以是该芯片的接口电路，该接口电路用于读入和输出基带信号。
本申请实施例提供一种通信方法，如图5所示，所述方法包括以下步骤：
步骤501、网络设备向第一终端设备、第二终端设备发送第一消息，所述第一消息包括第一信息和第二信息。第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备。
具体实现中，第二终端设备可以位于网络设备的覆盖小区的边缘，处于强覆盖区域的第一终端设备可以协助网络设备向第二终端设备发送数据。可以理解的是，第一终端设备和第二终端设备可以属于同一个用户协作组，例如，本申请实施例所述的第一协作组。此外，第一终端设备为CUE，用于协作网络设备向第二终端设备传输数据。第二终端设备为TUE，是网络设备所发送数据最终的接收端，即网络设备所发送数据会终结在所述第二终端设备。
当网络设备有下行数据需要向TUE发送时，可以先把下行数据发送给CUE，CUE从网络设备接收下行数据后，将下行数据发送给TUE。本申请实施例中，网络设备还可以通过搜索空间向CUE发送调度下行数据的控制信息，使得CUE可以在控制信息指示的资源上接收网络设备发送的下行数据，以协助网络设备向TUE发送下行数据。
此外，网络设备还需要向CUE发送搜索空间的信息，使得CUE可以在搜索空间进行盲检，在搜索空间中接收PDCCH，从中获取控制信息。
示例的，网络设备向CUE(例如，第一终端设备)发送第一消息，第一消息包括第一搜索空间的信息，例如，本申请实施例所述的第一信息。
一种可能的实现方式，第一信息可以包括第一搜索空间的标识(SearchSpace ID)、第一搜索空间对应的控制资源集(CORESET)的控制资源集ID(controlResourceSetId)、第一搜索空间的对应的控制信息格式(DCI format)和第一搜索空间对应的聚合等级L中的一个或多个。需要说明的是，根据控制资源集ID可以确定控制资源集的索引p第一搜索空间的对应的控制信息格式指的是第一搜索空间传输的PDCCH承载的DCI的格式，本申请实施例中第一信息中的DCI format可以是专用于协作传输的DCI format，可以理解的是，这种格式的DCI是协作传输场景下，网络设备向协作组中的终端设备发送的DCI；第一搜索空间对应的控制资源集指的是第一搜索空间所在的控制资源集；第一搜索空间对应的聚合等级L指的是第一搜索空间传输的PDCCH的聚合等级。
一种可能的实现方式中，第一消息为无线资源控制(radio resource control，RRC)消息。
需要说明的是，第一消息还可以指示第一终端设备和第二终端设备所在的协作组， 例如，本申请实施例所述的第一协作组。本申请实施例中，第一消息中的第二信息用于指示第一协作组标识，第一协作组标识为所述第一协作组的标识。
具体地，所述第一协作组标识可以是无线网络临时标识RNTI，第一协作组标识可以复用第二终端设备的RNTI，即第一协作组标识与第二终端设备的RNTI相同。
一种可能的实现方式中，所述第一协作组标识与所述第一终端设备的RNTI不同，且与所述第二终端设备的RNTI不同。
本申请实施例中，将公共搜索空间与协作组标识关联，终端设备只需要在协作组关联的搜索空间进行盲检，可以获取网络设备发送的群组(group)级别的控制信息，例如，协作组的DCI。相比之下，现有技术中终端设备在所有公共搜索空间、该终端设备所有的UE特定的搜索空间进行盲检，本申请实施例提供的方法大大降低了终端设备的盲检复杂度。
需要说明的是，群组级别的控制信息，即对协作组中的各个终端设备均接收的控制信息，例如，协助组中的CUE、TUE均接收网络设备发送的群组级别的控制信息。
一种可能的实现方式中，通过RRC消息的一条IE(information element)配置公共搜索空间和协作组标识。示例的，第二信息和第一信息在第一消息的同一条IE中。
本申请实施例中，网络设备还可以配置协作组专用的搜索空间。通过协作组专用的搜索空间传输群组级别的控制信息。例如，网络设备通过协作组专用的搜索空间传输PDCCH，所述PDCCH承载的控制信息用于调度TUE的下行数据。
一种可能的实现方式中，通过RRC消息的一条配置协作组专用的搜索空间和协作组标识，或者，通过RRC消息的不同IE配置协作组专用的搜索空间和协作组标识。可以理解的是，第二信息和第一信息可以在第一消息的同一条IE，也可以在第一消息的不同IE，本申请实施例对此不作限制。
需要说明的是，本申请实施例所述的第一搜索空间可以是第一协作组专用的搜索空间，第一终端设备可以在第一协作组专用的搜索空间盲检，尝试获取调度第二终端设备的下行数据的控制信息。
步骤502、所述第一终端设备根据所述第一信息和所述第二信息从所述第一搜索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。
具体实现中，第一终端设备可以在所述第一信息指示的第一搜索空间接收第一控制信息，所示第一控制信息由所述第一协作组标识加扰。进一步，第一终端设备还可以根据所述第二信息确定第一协作组标识，根据第一协作组标识解扰由所述第一控制信息。
需要说明的是，第一终端设备可以根据第一信息确定第一搜索空间占用的CCE，在这些CCE上进行盲检测，尝试接收网络设备发送的第一控制信息。
具体实现中，第一终端设备可以根据第一信息中的“控制资源集ID”以及“聚合等级L”确定第一搜索空间占用的CCE。例如，根据“控制资源集ID”确定“控制资源集的索引p”，将“控制资源集的索引p”和“聚合等级L”代入上述公式(1)确定第一搜索空间占用的CCE。
第一终端设备还可以根据第一信息中的DCI format在第一搜索空间占用的CCE进行盲检，获取第一控制信息。示例的，第一终端设备在第一搜索空间占用的CCE上 接收到的控制信息的格式为第一信息中的DCI format指示的格式，第一终端设备则确定该控制信息是网络设备向自己发送的，否则第一终端设备可以丢弃接收的控制信息，继续进行盲检。
第一终端设备还可以根据第二信息指示的协作组标识(例如，本申请实施例所述的第一协作组标识)解扰第一控制信息，确定第一控制信息指示的时频资源，以便在第一控制信息指示的时频资源上接收网络设备发送的第二终端设备的下行数据，从而可以协助网络设备向第二终端设备发送下行数据。
可选的，图5所示的方法还包括：
步骤503、所述第一终端设备根据所述第一控制信息从所述网络设备接收所述第二终端设备的下行数据。
步骤504、第一终端设备向所述第二终端设备转发从网络设备接收的下行数据。
具体地，第一终端设备还以通过与第二终端设备之间的通信链路向第二终端设备转发根据第一控制信息接收到的下行数据。其中，第一终端设备与第二终端设备之间的通信链路可以是V2X链路、D2D链路、非授权频谱链路或WiFi链路。
此外，第一终端设备采用的转发方式可以是放大转发(amplify-and-forward，AF)、译码转发(decode-and-forward，DF)等。其中，AF转发指的是第一终端设备将承载下行数据的模拟信号进行功率放大后转发。DF转发指的是第一终端设备从第一控制信息指示的时频资源上获取数据包，根据第一协作组标识解扰数据包获得传输块(transfer block，TB)后，将获得的TB转发给第二终端设备。
可选的，协作传输场景下，网络设备还可以通过RRC消息指示DCI的格式为协作传输专用的控制信息，使得终端设备可以根据网络设备指示的DCI format在搜索空间进行盲检，例如，当终端设备在RRC消息指示的搜索空间检测到协作传输专用格式的控制信息，则停止盲检测。
示例的，第一消息还可以第三信息，所述第三信息用于指示协作传输专用的控制信息格式。网络设备可以根据第三信息确定协作传输专用的控制信息格式，当在第一搜索空间检测到该格式的控制信息(例如，本申请实施例所述的第一控制信息)，则停止在第一搜索空间的盲检测。
一种可能的实现方式中，当网络设备通过协作组专用的搜索空间传输控制信息，网络设备可以通过RRC消息配置协作组专用的搜索空间相对于公共搜索空间的偏移量。
示例的，第一消息中的第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。第一终端设备可以第一偏移量以及公共搜索空间的信息确定第一协作组专用的搜索空间，例如，本申请实施例所述的第一搜索空间。
具体实现中，可以在RRC消息的searchSpaceType内增加一个字段，以定义协作组专用的搜索空间，该字段与common字段和ue-Specific字段并列，该字段可以包含dci-Format-for-UC。还可以在searchSpaceType内增加一个字段指示协作组专用的搜索空间相对于公共搜索空间的偏移量，该字段与searchSpaceType内其他字段并列。或者，在SearchSpace增加一个字段指示协作组专用的搜索空间相对于公共搜索空间的偏移 量，该字段与SearchSpace内的其它字段并列。第一信息在标准中的具体实现可以如下：
Figure PCTCN2019130190-appb-000012
其中，ue-cooperation用于定义协作组专用的搜索空间，offsetToCSS用于指示协作组专用的搜索空间与公共搜索空间之间的偏移量，dci-Format-for-UC用于指示协作专用的控制信息格式。
具体实现中，可以在RRC消息的searchSpaceType字段的common字段增加第二信息，例如，第二信息在标准中的具体实现可以如下：
Figure PCTCN2019130190-appb-000013
具体实现中，可以在RRC消息的searchSpaceType字段的common字段增加第三信息，第三信息可以与common字段下现有的dci-Format并列。例如，协作专用的控制信息格式“dci-Format-for-UC”字段在标准中的具体实现可以如下：
OPTIONAL      --Need R
            dci-Format-for-UC           SEQUENCE{…}
       },
本申请实施例提供一种通信方法，网络设备可以通过公共搜索空间传输协作传输专用的控制信息，如图6所示，所述方法包括以下步骤：
601、基站向TUE和CUE发送RRC消息。
其中，所述TUE和所述CUE是同一个协作组中的终端设备，CUE可以协助基站向TUE发送数据。所述RRC消息的一条IE中包括所述TUE和所述CUE所在的协作组的标识UC-RNTI和公共搜索空间的信息。公共搜索空间的信息可以是：公共搜索空间的SearchSpace ID、公共搜索空间传输的PDCCH承载的DCI的格式、公共搜索空间传输的PDCCH的聚合等级、公共搜索空间对应的控制资源集ID等。所述RRC消息可以认为是本申请实施例所述的第一消息。
602、基站在公共搜索空间发送PDCCH，PDCCH承载的DCI用协作组的标识UC-RNTI加扰。
603、CUE根据上述RRC消息中的公共搜索空间的信息在公共搜索空间进行盲检获取DCI。
具体地，CUE可以根据公共搜索空间对应的控制资源集IE确定控制资源集的索引p，CUE可以根据IE指示的聚合等级、控制资源集索引p确定公共搜索空间占用的 CCE，还可以根据协作组标识UC-RNTI解扰在公共搜索空间获取的DCI。
604、基站通过物理下行共享信道(physical downlink shared channel，PDSCH)向CUE发送下行数据。
605、CUE根据DCI在PDSCH接收下行数据。
具体地，CUE在DCI指示的时频资源上接收基站发送的下行数据，其中，所述下行数据是TUE的下行数据。
606、CUE向TUE发送从基站接收的下行数据。
本申请实施例提供一种通信方法，网络设备可以通过协作组专用的搜索空间(以下简称“专用搜索空间”)传输协作传输专用的控制信息，如图7所示，所述方法包括以下步骤：
701、基站向TUE和CUE发送RRC消息。
其中，所述TUE和所述CUE是同一个协作组中的终端设备，CUE可以协助基站向TUE发送数据。所述RRC消息的一条IE中包括所述TUE和所述CUE所在的协作组的标识UC-RNTI和专用搜索空间的信息，或者，协作组的标识UC-RNTI和专用搜索空间的信息在RRC消息的不同IE中。所述RRC消息可以认为是本申请实施例所述的第一消息。
专用搜索空间的信息可以是：专用搜索空间相对于公共搜索空间的偏移量、专用搜索空间传输的PDCCH承载的DCI的格式、专用搜索空间传输的PDCCH的聚合等级、专用搜索空间对应的控制资源集ID等。
702、基站在专用搜索空间发送PDCCH，PDCCH承载的DCI用协作组的标识UC-RNTI加扰。
703、CUE根据上述RRC消息中的专用搜索空间的信息在专用搜索空间进行盲检获取DCI。
具体地，CUE可以根据IE指示的聚合等级、控制资源集ID以及专用搜索空间相对于公共搜索空间的偏移量确定专用搜索空间占用的CCE，还可以根据协作组标识UC-RNTI解扰在专用搜索空间获取的DCI。
704、基站通过PDSCH向CUE发送TUE的下行数据。
705、CUE根据DCI在PDSCH接收下行数据。
具体地，CUE在DCI指示的时频资源上接收基站发送下行数据，其中，所述下行数据是TUE的下行数据。
706、CUE向TUE发送从基站接收的下行数据。
一种可能的实现方式，协议定义了协作组专用的搜索空间与公共搜索空间之间的偏移量Δ UC。则在前述公式(1)的基础上，协作组专用的搜索空间满足以下公式(2)：
Figure PCTCN2019130190-appb-000014
其中，Δ UC是非0整数；
一种可能的实现方式中，在前述公式(1)中增加一项参数n UC，协议定义该参数的取值或取值范围，或，根据协作组标识UC-RNTI确定该参数，例如，该参数是协作组标识UC-RNTI的函数。协作组专用的搜索空间满足以下公式(3)：
Figure PCTCN2019130190-appb-000015
其中，对于协作组专用的搜索空间，n UC＝Δ UC，其中Δ UC是非0整数；当搜索空间为公共搜索空间，n UC＝0；
一种可能的实现方式中，公式中增加一项n UC，该参数n UC通过RRC消息配置，协作组专用的搜索空间满足以下公式(4)：
Figure PCTCN2019130190-appb-000016
其中，对于协作组专用的搜索空间，n UC＝Δ UC，其中Δ UC是非0整数；当搜索空间为公共搜索空间，n UC＝0。
需要说明的是，上述公式(2)、(3)或(4)中的其他参数的含义参考本申请实施例前述对公式(1)的相关描述，在此不做赘述。具体实现中，CUE可以根据专用搜索空间对应的控制资源集ID确定控制资源集的索引p，还可以将专用搜索空间与公共搜索空间之间的偏移量Δ UC、专用搜索空间对应的控制资源集的索引p以及专用搜索传输的PDCCH的聚合等级L代入上述公式(2)、(3)或(4)确定专用搜索空间占用的CCE，从而在专用搜索空间占用的CCE上进行盲检获得调度TUE的下行数据的DCI。
在采用对应各个功能划分各个功能模块的情况下，图8示出上述实施例中所涉及的通信装置的一种可能的结构示意图。图8所示的通信装置可以是本申请实施例所述的第一终端设备，也可以是终端设备中实现上述方法的部件，或者，也可以是应用于终端设备中的芯片。所述芯片可以是片上系统(System-On-a-Chip，SOC)或者是具备通信功能的基带芯片等。如图8所示，通信装置包括处理单元801以及通信单元802。处理单元可以是一个或多个处理器，通信单元可以是收发器。
处理单元801，用于支持第一终端设备执行步骤503，和/或用于本文所描述的技术的其它过程。
通信单元802，用于支持第一终端设备与其他通信装置之间的通信，例如，支持终端设备执行步骤504，和/或用于本文所描述的技术的其它过程。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
示例性的，在采用集成的单元的情况下，本申请实施例提供的通信装置的结构示意图如图9所示。在图9中，该通信装置包括：处理模块901和通信模块902。处理模块901用于对通信装置的动作进行控制管理，例如，执行上述处理单元801执行的步骤，和/或用于执行本文所描述的技术的其它过程。通信模块902用于执行上述通信单元802执行的步骤，支持通信装置与其他设备之间的交互，如与其他终端设备装置之间的交互。如图9所示，通信装置还可以包括存储模块903，存储模块903用于存储通信装置的程序代码和数据。
当处理模块901为处理器，通信模块902为收发器，存储模块903为存储器时，通信装置为图4a所示的通信装置。
在采用对应各个功能划分各个功能模块的情况下，图10示出上述实施例中所涉及的通信装置的一种可能的结构示意图。图10所示的通信装置可以是本申请实施例所述 的网络设备，也可以是网络设备中实现上述方法的部件，或者，也可以是应用于网络设备中的芯片。所述芯片可以是片上系统(System-On-a-Chip，SOC)或者是具备通信功能的基带芯片等。如图10所示，通信装置包括处理单元1001以及通信单元1002。处理单元1001可以是一个或多个处理器，通信单元1002可以是收发器。
处理单元1001，用于支持网络设备执行内部处理，例如，支持网络设备确定第一信息和第二信息，和/或用于本文所描述的技术的其它过程。
通信单元1002，用于支持网络设备与其他通信装置之间的通信，例如，支持网络设备执行步骤501，和/或用于本文所描述的技术的其它过程。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
示例性的，在采用集成的单元的情况下，本申请实施例提供的通信装置的结构示意图如图11所示。在图11中，该通信装置包括：处理模块1101和通信模块1102。处理模块1101用于对通信装置的动作进行控制管理，例如，执行上述处理单元1001执行的步骤，和/或用于执行本文所描述的技术的其它过程。通信模块1102用于执行上述通信单元1002执行的步骤，支持通信装置与其他设备之间的交互，如与其他网络设备装置之间的交互。如图11所示，通信装置还可以包括存储模块1103，存储模块1103用于存储通信装置的程序代码和数据。
当处理模块1101为处理器，通信模块1102为收发器，存储模块1103为存储器时，通信装置为图4b所示的通信装置。
本申请实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有指令；指令用于执行如图5所示的方法。
本申请实施例提供一种包括指令的计算机程序产品，当其在通信装置上运行时，使得通信装置执行如图5所示的方法。
本申请实施例一种无线通信装置，包括：无线通信装置中存储有指令；当无线通信装置在图4a、图4b、图8至图11所示的通信装置上运行时，使得通信装置执行如图5所示的方法。该无线通信装置可以为芯片。
本申请实施例还提供一种通信系统，包括：终端设备以及网络设备。示例性的，终端设备可以是图4a、图8、图9所示的通信装置，网络设备可以是图4b、图10、图11所示的通信装置。
通过以上的实施方式的描述，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，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将数据库访问装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
本申请实施例中的处理器，可以包括但不限于以下至少一种：中央处理单元(central processing unit，CPU)、微处理器、数字信号处理器(DSP)、微控制器(microcontroller unit，MCU)、或人工智能处理器等各类运行软件的计算设备，每种计算设备可包括一个或多个用于执行软件指令以进行运算或处理的核。该处理器可以是个单独的半导体芯片，也可以跟其他电路一起集成为一个半导体芯片，例如，可以跟其他电路(如编解码电路、硬件加速电路或各种总线和接口电路)构成一个SoC(片 上系统)，或者也可以作为一个ASIC的内置处理器集成在所述ASIC当中，该集成了处理器的ASIC可以单独封装或者也可以跟其他电路封装在一起。该处理器除了包括用于执行软件指令以进行运算或处理的核外，还可进一步包括必要的硬件加速器，如现场可编程门阵列(field programmable gate array，FPGA)、PLD(可编程逻辑器件)、或者实现专用逻辑运算的逻辑电路。
本申请实施例中的存储器，可以包括如下至少一种类型：只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically erasable programmabler-only memory，EEPROM)。在某些场景下，存储器还可以是只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
本申请中，“至少一个”是指一个或者多个。“多个”是指两个或两个以上。“和/或”，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的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
在本申请所提供的几个实施例中，应该理解到，所揭露的数据库访问装置和方法，可以通过其它的方式实现。例如，以上所描述的数据库访问装置实施例仅仅是示意性的，例如，所述模块或单元的划分，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装置，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，数据库访问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一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。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。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时， 可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该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个设备(可以是单片机，芯片等)或处理器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、ROM、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，任何在本申请揭露的技术范围内的变化或替换，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 (34)

  1. 一种通信方法，其特征在于，所述方法包括：
    第一终端设备从网络设备接收第一消息，所述第一消息包括第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括所述第一终端设备和第二终端设备；
    所述第一终端设备根据所述第一信息和所述第二信息从所述第一搜索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备根据所述第一控制信息从所述网络设备接收所述第二终端设备的下行数据；
    所述第一终端设备向所述第二终端设备转发所述下行数据。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述第二信息与所述第一搜索空间关联。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述第一终端设备根据所述第一信息和所述第二信息从第一搜索空间获取第一控制信息，包括：
    所述第一终端设备在所述第一信息指示的所述第一搜索空间接收由所述第一协作组标识加扰的所述第一控制信息；
    所述第一终端设备根据所述第二信息解扰由所述第一协作组标识加扰的所述第一控制信息。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述第一控制信息的格式为协作传输专用的。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，
    所述第一协作组标识与所述第二终端设备的RNTI相同。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
  10. 一种通信方法，其特征在于，所述方法包括：
    网络设备确定第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括第一终端设备和第二终端设备；
    所述网络设备向所述第一终端设备发送第一消息，所述第一消息包括所述第一信息和所述第二信息；
    通过所述第一搜索空间发送第一控制信息，所述第一控制信息用于调度所述第二 终端设备的下行数据。
  11. 根据权利要求10所述的方法，其特征在于，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第二信息与所述第一搜索空间关联。
  13. 根据权利要求10-12任一项所述的方法，其特征在于，所述第一控制信息的格式为协作传输专用的。
  14. 根据权利要求10-13任一项所述的方法，其特征在于，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
  15. 根据权利要求10-14任一项所述的方法，其特征在于，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，
    所述第一协作组标识与所述第二终端设备的RNTI相同。
  16. 根据权利要求10-15任一项所述的方法，其特征在于，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
  17. 一种通信装置，其特征在于，包括：
    通信单元，用于从网络设备接收第一消息，所述第一消息包括第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括第一终端设备和第二终端设备；
    处理单元，用于根据所述第一信息和所述第二信息从所述第一搜索空间获取第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。
  18. 根据权利要求17所述的装置，其特征在于，
    所述处理单元还用于，根据所述第一控制信息通过所述通信单元从所述网络设备接收所述第二终端设备的下行数据；
    所述通信单元还用于，向所述第二终端设备转发所述下行数据。
  19. 根据权利要求17或18所述的装置，其特征在于，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
  20. 根据权利要求17-19任一项所述的装置，其特征在于，所述第二信息与所述第一搜索空间关联。
  21. 根据权利要求17-20任一项所述的装置，其特征在于，所述处理单元具体用于，在所述第一信息指示的所述第一搜索空间通过所述通信单元接收由所述第一协作组标识加扰的所述第一控制信息；
    所述处理单元还用于，根据所述第二信息解扰由所述第一协作组标识加扰的所述第一控制信息。
  22. 根据权利要求17-21任一项所述的装置，其特征在于，所述第一控制信息的格式为协作传输专用的。
  23. 根据权利要求17-22任一项所述的装置，其特征在于，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
  24. 根据权利要求17-23任一项所述的装置，其特征在于，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，
    所述第一协作组标识与所述第二终端设备的RNTI相同。
  25. 根据权利要求17-24任一项所述的装置，其特征在于，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
  26. 一种通信装置，其特征在于，包括：
    处理单元，用于第一信息以及第二信息；所述第一信息用于指示第一搜索空间，所述第二信息用于指示第一协作组标识，其中，所述第一协作组包括第一终端设备和第二终端设备；
    通信单元，用于向所述第一终端设备发送第一消息，所述第一消息包括所述第一信息和所述第二信息；
    所述通信单元还用于，通过所述第一搜索空间发送第一控制信息，所述第一控制信息用于调度所述第二终端设备的下行数据。
  27. 根据权利要求26所述的装置，其特征在于，所述第一搜索空间为公共搜索空间，或，所述第一搜索空间为所述第一协作组专用的搜索空间。
  28. 根据权利要求26或27所述的装置，其特征在于，所述第二信息与所述第一搜索空间关联。
  29. 根据权利要求26-28任一项所述的装置，其特征在于，所述第一控制信息的格式为协作传输专用的。
  30. 根据权利要求26-29任一项所述的装置，其特征在于，所述第一消息还包括第三信息，所述第三信息用于指示协作传输专用的控制信息格式。
  31. 根据权利要求26-30任一项所述的装置，其特征在于，所述第一协作组标识为无线网络临时标识RNTI；其中，所述第一协作组标识与所述第一终端设备的RNTI、所述第二终端设备的RNTI不同；或，
    所述第一协作组标识与所述第二终端设备的RNTI相同。
  32. 根据权利要求26-31任一项所述的装置，其特征在于，所述第一信息包括第一偏移量以及公共搜索空间的信息，所述第一偏移量为所述第一搜索空间与公共搜索空间之间的偏移量。
  33. 一种计算机可读存储介质，包括程序或指令，当所述程序或指令被处理器运行时，如权利要求1至9中任意一项所述的方法被执行。
  34. 一种计算机可读存储介质，包括程序或指令，当所述程序或指令被处理器运行时，如权利要求10至16中任意一项所述的方法被执行。
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