WO2021134697A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2021134697A1
WO2021134697A1 PCT/CN2019/130937 CN2019130937W WO2021134697A1 WO 2021134697 A1 WO2021134697 A1 WO 2021134697A1 CN 2019130937 W CN2019130937 W CN 2019130937W WO 2021134697 A1 WO2021134697 A1 WO 2021134697A1
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WO
WIPO (PCT)
Prior art keywords
communication device
radio bearer
data radio
information
data
Prior art date
Application number
PCT/CN2019/130937
Other languages
English (en)
French (fr)
Inventor
王君
戴明增
彭文杰
张鹏
许华
Original Assignee
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.)
Filing date
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 EP19958389.9A priority Critical patent/EP4068842A4/en
Priority to CN201980103024.0A priority patent/CN114830717A/zh
Priority to PCT/CN2019/130937 priority patent/WO2021134697A1/zh
Publication of WO2021134697A1 publication Critical patent/WO2021134697A1/zh
Priority to US17/855,030 priority patent/US20220338288A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • This application relates to the field of communication, and in particular to a communication method and device.
  • a layer 2 (L2) relay (relay) communication of the terminal is proposed to support network equipment and remote terminal equipment (that is, access to the network through the relay terminal equipment).
  • the control plane interaction between the terminal equipment of the equipment and the interaction of radio resource control (RRC) signaling between the network equipment and the remote terminal equipment are supported, so as to improve the network equipment’s ability to communicate with the remote end in the relay communication.
  • RRC radio resource control
  • the present application provides a communication method and device, which are used to improve the efficiency of data transmission between network equipment and remote terminal equipment under the L2 relay communication architecture.
  • this application provides a communication method.
  • the communication method can be executed by a network device such as a base station or a chip in the network device.
  • the first information can be sent by the network device to the first communication device, and the first information can indicate the correspondence between the first data radio bearer and the second data radio bearer, and the first data radio bearer is the network device
  • the data radio bearer between the first communication device and the first communication device, and the second data radio bearer is the data radio bearer between the first communication device and the second communication device; the network device can also send the second communication device to the second communication device.
  • the second information may indicate the first packet data convergence protocol (packet data convergence protocol, PDCP) entity of the universal user to network interface (Uu interface) of the second communication device and the second communication device 2.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • SL sidelink
  • the network device configures the corresponding relationship between the first data radio bearer and the second data radio bearer to the first communication device, so that the first communication device knows that the communication is performed through the first data radio bearer and the second data radio bearer.
  • Relay transmission between the network equipment and the second communication device the network equipment configures the second communication device with the correspondence between the RLC entity of the SL interface corresponding to the second data radio bearer and the PDCP entity of the Uu interface, and the second communication device can efficiently implement the relay transmission. Determination of PDCP entities.
  • the above communication method improves the data transmission efficiency of L2 relay communication.
  • the first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the above first data radio bearer does not include the PDCP entity of the first communication device, and the second data radio bearer does not include the PDCP entity of the first communication device.
  • the network device may further send third information to the third communication apparatus, and the third information may indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network equipment and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the network device may also send fourth information to the second communication device.
  • the fourth information may indicate the correspondence between the first PDCP entity and the second RLC entity of the SL interface of the second communication device.
  • the two RLC entities correspond to the fourth data radio bearer.
  • the first PDCP entity is associated with the first RLC entity and the second RLC entity of the SL interface at the same time. Therefore, the same PDCP entity of the Uu interface can process the data of multiple RLC entities of the SL interface, which is the L2 relay communication.
  • the introduction of repetitive transmission and off-stream transmission provides the possibility.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the network device may also send fifth information to the second communication device, and the fifth information may indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the first PDCP entity is simultaneously associated with the first RLC entity of the SL interface and the third RLC entity of the Uu interface. Therefore, the same PDCP entity of the Uu interface can process the data of multiple RLC entities, which is the L2 relay communication
  • the introduction of repetitive transmission and off-stream transmission provides the possibility.
  • an embodiment of the present application provides a communication method.
  • the method can be executed by the first communication device or a chip in the first communication device.
  • the first communication device may include a relay device such as a terminal, which is used to relay the second communication device to a network device.
  • the first communication device receives the first information from the network device, and the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device
  • the second data radio bearer is a data radio bearer between the first communication device and a second communication device
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the first RLC entity of the SL interface of the communication device corresponds to the second data radio bearer
  • the first PDCP entity of the Uu interface of the second communication device corresponds to the first RLC entity of the SL interface.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the first communication device may also receive data from the network device through the first data radio bearer, and send the data to the second communication device through the second data radio bearer.
  • the first communication device can also receive data from the second communication device through the second data radio bearer, and send the data to the network device via the first data radio bearer.
  • the above first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • an embodiment of the present application provides a communication method.
  • the method can be executed by the second communication device or a chip in the second communication device.
  • the second communication device may include equipment such as a terminal, which is used to communicate with network equipment through the relay of the first communication device.
  • the second communication device can receive the second information from the network device, and the second information can indicate the first PDCP entity of the Uu interface of the second communication device and the first SL interface of the second communication device.
  • the first RLC entity corresponds to a second data radio bearer.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • a first data radio bearer, and the first data radio bearer corresponds to the second data radio bearer.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the second communication device may also receive fourth information from the network device, where the fourth information is used to indicate the second RLC entity of the SL interface between the first PDCP entity and the second communication device Correspondence between.
  • the second RLC entity corresponds to a fourth data radio bearer
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device
  • the maintenance between the third communication device and the network device There is a third data radio bearer
  • the fourth data radio bearer corresponds to the third data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the second communication device may also receive fifth information from the network device, where the fifth information is used to indicate the third RLC entity of the Uu interface between the first PDCP entity and the second communication device Correspondence between.
  • the third RLC entity corresponds to a fifth data radio bearer
  • the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • an embodiment of the present application provides a communication device.
  • the communication device can be used to perform the steps performed by the network device in the first aspect or any possible design of the first aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • a communication device may be provided with functional modules corresponding to the functions or steps or operations in the above-mentioned methods to support the communication device to execute the above-mentioned methods.
  • the communication device may be a network device or a chip in a network device.
  • the communication device may include a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the network device in the above method, such as the action used to perform the network device sending information, messages or signaling to the first communication device, the second communication device, and the third communication device .
  • the processing module can be used to perform the processing actions of the network device in the above method, for example, it is used to control the communication module to receive and send information, messages or signaling, and to process and store information.
  • the communication module may be used to send the first information to the first communication device.
  • the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is the data radio bearer between the network device and the first communication device
  • the second data radio bearer is the data radio bearer between the network device and the first communication device.
  • the radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the communication module may also be used to send second information to the second communication device.
  • the second information may indicate the difference between the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device. In the corresponding relationship between the two, the first RLC entity corresponds to the second data radio bearer.
  • the first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the above first data radio bearer does not include the PDCP entity of the first communication device, and the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module may further send third information to the third communication device, and the third information may indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network device and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the communication module may also send fourth information to the second communication device.
  • the fourth information may indicate the correspondence between the first PDCP entity and the second RLC entity of the SL interface of the second communication device.
  • the RLC entity corresponds to the fourth data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the communication module may further send fifth information to the second communication device, and the fifth information may indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the communication device may include a transceiver.
  • the transceiver and the processor may be coupled to each other, where the transceiver may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above transceiver can be used to perform the sending and/or receiving actions of the network device in the above method, such as the action of the network device sending information, messages or signaling to the first communication device, the second communication device, and the third communication device .
  • the processor can be used to perform processing actions of the network device in the method, such as controlling the transceiver to receive and send information, messages or signaling, and to process and store information, messages or signaling.
  • the transceiver may be used to send the first information to the first communication device.
  • the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is the data radio bearer between the network device and the first communication device
  • the second data radio bearer is the data radio bearer between the network device and the first communication device.
  • the radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the transceiver may also be used to send second information to the second communication device.
  • the second information may indicate the difference between the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device. In the corresponding relationship between the two, the first RLC entity corresponds to the second data radio bearer.
  • the first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the above first data radio bearer does not include the PDCP entity of the first communication device, and the second data radio bearer does not include the PDCP entity of the first communication device.
  • the transceiver may further send third information to the third communication device, and the third information may indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network device and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the transceiver may also send fourth information to the second communication device.
  • the fourth information may indicate the correspondence between the first PDCP entity and the second RLC entity of the SL interface of the second communication device.
  • the RLC entity corresponds to the fourth data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the transceiver may also send fifth information to the second communication device, and the fifth information may indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • an embodiment of the present application provides a communication device.
  • the communication device can be used to perform the steps performed by the first communication device in the above-mentioned second aspect or any possible design of the second aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • a communication device may be provided with functional modules corresponding to the functions or steps or operations in the above-mentioned methods to support the communication device to execute the above-mentioned methods.
  • the communication device may be the first communication device or a chip in the first communication device.
  • the communication device may include a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the first communication device in the above method, such as the action of receiving information, messages or signaling from network equipment, or sending information to the second communication device, The action of the message or signaling.
  • the processing module can be used to perform processing actions of the first communication device in the method, such as controlling the communication module to receive and send information, messages, or signaling, and to process and store information.
  • the communication module may receive first information from the network device, and the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device
  • the second data radio bearer is a data radio bearer between the first communication device and a second communication device
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the first RLC entity of the SL interface of the communication device corresponds to the second data radio bearer
  • the first PDCP entity of the Uu interface of the second communication device corresponds to the first RLC entity of the SL interface.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module may also receive data from the network device through the first data radio bearer, and send the data to the second communication device through the second data radio bearer.
  • the communication module can also receive data from the second communication device through the second data radio bearer, and send the data to the network device through the first data radio bearer.
  • the above first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the communication device may include a transceiver.
  • the transceiver and the processor may be coupled to each other, where the transceiver may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above transceiver can be used to perform the sending and/or receiving actions of the first communication device in the above method, such as the action of receiving information, messages or signaling from network equipment, or sending information to the second communication device, The action of the message or signaling.
  • the processor can be used to perform processing actions of the first communication device in the method, such as controlling the communication module to receive and send information, messages, or signaling, and to process and store information.
  • the transceiver may receive first information from the network device, and the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device
  • the second data radio bearer is a data radio bearer between the first communication device and a second communication device
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the first RLC entity of the SL interface of the communication device corresponds to the second data radio bearer
  • the first PDCP entity of the Uu interface of the second communication device corresponds to the first RLC entity of the SL interface.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the transceiver may also receive data from the network device through the first data radio bearer, and send the data to the second communication device through the second data radio bearer.
  • the transceiver can also receive data from the second communication device through the second data radio bearer, and send the data to the network device through the first data radio bearer.
  • the above first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • an embodiment of the present application provides a communication device.
  • the communication device can be used to perform the steps performed by the second communication device in the third aspect or any possible design of the third aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • a communication device may be provided with functional modules corresponding to the functions or steps or operations in the above-mentioned methods to support the communication device to execute the above-mentioned methods.
  • the communication device may be a second communication device or a chip in the second communication device.
  • the communication device may include a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the second communication device in the above method, such as the action of receiving information, messages, or signaling from the network device.
  • the processing module can be used to perform processing actions of the second communication device in the method, such as controlling the communication module to receive and send information, messages, or signaling, and information processing and storage.
  • the communication module 1101 may receive second information from the network device, and the second information may indicate the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device Correspondence between.
  • the first RLC entity corresponds to a second data radio bearer.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • a first data radio bearer, and the first data radio bearer corresponds to the second data radio bearer.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module may also receive fourth information from the network device, where the fourth information is used to indicate the communication between the first PDCP entity and the second RLC entity of the SL interface of the second communication device The corresponding relationship.
  • the second RLC entity corresponds to a fourth data radio bearer
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device
  • the maintenance between the third communication device and the network device There is a third data radio bearer
  • the fourth data radio bearer corresponds to the third data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the communication module may also receive fifth information from the network device, where the fifth information is used to indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device The corresponding relationship.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the communication device may include a transceiver.
  • the transceiver and the processor may be coupled to each other, where the transceiver may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above transceiver can be used to perform the sending and/or receiving action of the second communication device in the above method, for example, it can be used to perform the action of receiving information, messages or signaling from a network device.
  • the processor can be used to perform processing actions of the second communication device in the method, such as controlling the communication module to receive and send information, messages, or signaling, and to process and store information.
  • the transceiver may receive second information from the network device, and the second information may indicate whether the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device are Correspondence between.
  • the first RLC entity corresponds to a second data radio bearer.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • a first data radio bearer, and the first data radio bearer corresponds to the second data radio bearer.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the transceiver may also receive fourth information from the network device, where the fourth information is used to indicate the communication between the first PDCP entity and the second RLC entity of the SL interface of the second communication device The corresponding relationship.
  • the second RLC entity corresponds to a fourth data radio bearer
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device
  • the maintenance between the third communication device and the network device There is a third data radio bearer
  • the fourth data radio bearer corresponds to the third data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the transceiver may also receive fifth information from the network device, where the fifth information is used to indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device The corresponding relationship.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • this application provides a communication system.
  • the communication system may include the communication devices shown in the fourth aspect, the fifth aspect, and the sixth aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program or instruction.
  • the computer program or instruction is executed, the first aspect, the second The method of the aspect or the third aspect is implemented.
  • embodiments of the present application provide a computer program product, the computer program product includes a computer program or instruction, when the computer program or instruction is executed, the first aspect, the second aspect, or the third aspect The described method is implemented.
  • the present application provides a chip and/or a chip system including the chip, and the chip may include a processor.
  • the chip executes the computer program in the memory, the method as described in the first, second or third aspect is executed.
  • the chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).
  • FIG. 1 is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the application
  • 2A is a schematic diagram of an L2 relay communication control plane protocol stack provided by an embodiment of this application.
  • 2B is a schematic diagram of an L2 relay communication user plane protocol stack provided by an embodiment of this application.
  • FIG. 3 is a schematic structural diagram of another wireless communication system provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram of a configuration table applied to a first communication device according to an embodiment of the application
  • FIG. 6 is a schematic diagram of a configuration table applied to a second communication device according to an embodiment of the application.
  • FIG. 7 is a schematic diagram of another configuration table applied to a second communication device according to an embodiment of the application.
  • FIG. 8 is a schematic diagram of another configuration table applied to a second communication device according to an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • the L2 relay communication scenario shown in FIG. 1 may include a network device, a first communication device, and a second communication device.
  • the network device and the second communication device can communicate with each other through the relay of the first communication device. Even if the second communication device is outside the wireless signal coverage of the network device, the second communication device and the network device can still communicate through the first communication device.
  • the first communication device may also be called a relay terminal device (or relay terminal)
  • the second communication device may also be called a remote terminal device (or remote terminal).
  • the first communication device can relay the second communication device to a network device.
  • the first communication device may be a terminal device or a communication device with a relay function such as a relay station or a road site unit (RSU), or a chip in these communication devices.
  • the first communication device may also be a communication chip with a communication module, or a vehicle with a communication function, or an in-vehicle device (such as an in-vehicle communication device, an in-vehicle communication chip), or the like.
  • the second communication device may be a terminal device or a chip in the terminal device, and the second communication device may have a wireless transceiver function. For example, it can communicate with one or more network devices of one or more communication systems (such as wireless communication), and accept network services provided by network devices.
  • the network devices here include but are not limited to the network devices shown in FIG. 1 .
  • terminal equipment such as user equipment (UE), terminal (terminal), access terminal, terminal unit, terminal station, mobile station (MS), remote station, remote terminal, Mobile terminal (mobile terminal), wireless communication equipment or terminal agent, etc.
  • UE user equipment
  • terminal terminal
  • access terminal terminal unit
  • terminal station terminal station
  • MS mobile station
  • remote station remote terminal
  • Mobile terminal mobile terminal
  • wireless communication equipment wireless communication equipment or terminal agent
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, and a wireless local loop (WLL) station.
  • terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; terminal equipment can also be deployed on the water (such as ships, etc.); terminal equipment can also be deployed in the air (such as airplanes, balloons, and satellites, etc.) .
  • the terminal equipment can specifically be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, and an industrial control (industrial control) Wireless terminals in, self-driving (self-driving) wireless terminals, wireless terminals in remote medical (remote medical), wireless terminals in smart grid (smart grid), wireless terminals in transportation safety, Wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the terminal device in this application may also be a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), etc.
  • the communication between the first communication device and the second communication device may be performed through a sidelink (SL) interface (or called proximity-based services (ProSe) interface, direct communication (PC5) interface) Communication.
  • SL sidelink
  • ProSe proximity-based services
  • PC5 direct communication
  • the network device is an access site of the mobile communication network and can be used to provide access to the mobile communication network.
  • the mobile communication network may be NR or a mobile network updated in the future.
  • the network device can be an access network device (or called an access website point).
  • the access network equipment refers to equipment that provides network access functions, such as a radio access network (RAN) base station and so on.
  • the network equipment may specifically be an NR base station or a base station in a future evolved PLMN network.
  • the network device may also include a relay station (relay device), a transmission point, a transmission point, or a wireless access point, and so on.
  • the network device can be a wearable device or a vehicle-mounted device.
  • the network device can also be a communication chip with a communication module.
  • the first communication device may access the network device through a universal user to network interface (universal user to network interface, Uu interface).
  • a universal user to network interface universal user to network interface, Uu interface
  • Radio bearers can include data radio bearers (DRB) and signaling radio bears (signaling radio bear, SRB).
  • DRB data radio bearers
  • SRB signaling radio bears
  • data radio bearers can be used to transmit data
  • signaling radio bearers can be used to transmit control plane signaling.
  • the control plane protocol stack architecture used for communication between the network equipment, the first communication device, and the second communication device is shown in FIGS. 2A and 2B. It can be seen that the network device and the second communication device can respectively communicate through the RRC entity of the Uu interface and the packet data convergence protocol (PDCP) entity of the Uu interface. Therefore, for the network device, the second communication device It can be seen that the reliability of relay communication can be improved.
  • the PDCP entity can be used to perform functions such as header compression of an Internet protocol (IP) data packet to compress the size of the transmitted data packet.
  • IP Internet protocol
  • the packet header of the data is compressed by the PDCP entity of the network device, and decompressed by the second communication device through the corresponding PDCP entity, so that the second communication device The header of the complete IP data packet can be obtained for subsequent processing.
  • FIGS. 2A and 2B Exemplarily, the schematic diagrams of the control plane protocol stack and the user plane protocol stack in the L2 relay scenario shown in FIG. 1 are shown in FIGS. 2A and 2B, respectively.
  • the following takes the user plane protocol stack as an example for specific description, and the control plane protocol stack can be understood by reference.
  • the user plane radio bearers of the Uu interface of the network device and the first communication device respectively include a radio link control (radio link control, RLC) entity (and/or configuration).
  • RLC radio link control
  • the user plane radio bearer of the Uu interface may also include a medium access control (MAC) entity (and/or configuration) and/or a physical (PHY) layer entity (and/or configuration) as well as
  • the selection may include an adaptation layer (AL) entity (and/or configuration).
  • the radio bearers of the SL interface (or PC5 interface, ProSe interface) of the first communication device and the second communication device respectively include an RLC entity (and/or configuration), a MAC entity (and/or configuration), and a PHY entity (and/or Configuration) and optionally may include an adaptation layer entity (and/or configuration).
  • the control plane radio bearer of the interface between the network device and the second communication device Uu also includes an RRC entity (and/or configuration), a NAS entity (and/or configuration), and a PDCP entity (and/or configuration), respectively.
  • the control plane radio bearer of the Uu interface between the network device and the second communication device also includes a PDCP entity (and/or configuration) respectively, and optionally may include a service data adaptation protocol (SDAP) entity.
  • SDAP service data adaptation protocol
  • the radio bearer in this application may include the entities and/or configurations of each protocol layer (such as the RLC layer, the MAC layer PHY layer, etc.).
  • the entities of each protocol layer will be described as examples in the following, but it should not be It is understood that the radio bearer in this application only includes entities of each protocol layer, because the radio bearer may also include the configuration of the protocol layer, or the radio bearer may only include the configuration of the protocol layer.
  • At least one logical channel (logic channel, LCH) of the Uu interface is maintained between the RLC entity of the Uu interface of the network device and the RLC entity of the Uu interface of the first communication device.
  • At least one logical channel of the SL interface is maintained between the RLC entity of the SL interface of the first communication device and the RLC entity of the SL interface of the remote terminal device.
  • multiple paths can also be used to communicate between the network device and the remote terminal device to achieve duplication of data or split transmission of data, thereby improving communication reliability and Data transfer rate.
  • the network device and the remote terminal device can communicate through multiple paths formed by multiple relay devices at the same time; or, the network device and the remote terminal device can communicate through at least one relay device, At the same time, the network equipment and the remote terminal equipment can communicate directly, for example, through the Uu interface.
  • the network device and the second communication device can communicate through any one or more paths among the first communication device, the third communication device, or the Uu interface between the network device and the second communication device.
  • the logical channel of the Uu interface between the network device and the first communication device can be represented as Uu_LCH_1, and the Uu_LCH_1 can be represented by the RLC entity (or RLC entity and logical channel) of the Uu interface of the network device.
  • the corresponding MAC entity is jointly maintained with the RLC entity of the Uu interface of the first communication device (or the RLC entity and the MAC entity corresponding to the logical channel).
  • the logical channel of the SL interface between the first communication device and the second communication device can be represented as SL_LCH_1, and the SL_LCH_1 can be the RLC entity (or RLC entity and logical channel corresponding to the SL interface of the first communication device).
  • the MAC entity is jointly maintained with the RLC entity of the SL interface of the second communication device (or the RLC entity and the MAC entity corresponding to the logical channel).
  • the RLC entity of the Uu interface of the network device and the RLC entity of the Uu interface of the third communication device jointly maintain the Uu_LCH_2 logical channel;
  • the RLC entity of the SL interface of the third communication device (or the RLC entity and the MAC entity corresponding to the logical channel)
  • the RLC entity (or the RLC entity and the MAC entity corresponding to the logical channel) of the SL interface of the second communication device jointly maintain the SL_LCH_2 logical channel.
  • the RLC entity of the Uu interface of the network device (or the RLC entity and the MAC entity corresponding to the logical channel) and the RLC entity of the Uu interface of the second communication device (or The RLC entity and the MAC entity corresponding to the logical channel jointly maintain the Uu_LCH_3 logical channel.
  • the present application does not limit the communication between the network device and the second communication device through other paths not shown in FIG. 3.
  • this application does not limit the number of communication paths between the network device and the second communication device through the Uu interface.
  • the network device can configure multiple radio bearers of the second communication device, and communicate with the second communication device through each radio bearer. Communication between the communication devices is performed separately, and at this time, each radio bearer can correspond to a path of the Uu interface between the network device and the second communication device.
  • an embodiment of the present application provides a communication method to improve the efficiency of data transmission between a network device and a second communication device in L2 relay communication.
  • the communication method may be implemented by a network device, a first communication device, and a second communication device, where the first communication device may include a relay terminal device between the network device and the second communication device, or a chip in the relay terminal device.
  • the communication method can also be executed by a network device, a first communication device, a second communication device, and a third communication device. At this time, the first communication device and the third communication device can be respectively used as a relay terminal device between the network device and the second communication device, or as a chip in the relay terminal device. Therefore, based on the communication method provided by the present application, the network device and the second communication device can communicate through the first communication device and/or the third communication device.
  • the method may include the following steps:
  • the network device sends first information to the first communication device.
  • the first information is used to indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device.
  • the first data radio bearer is a data radio bearer of a Uu interface between the network device and the first communication device.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the second data radio bearer is a data radio bearer of the SL interface between the first communication device and the second communication device.
  • the first communication device receives the first information.
  • S102 The network device sends second information to the second communication device.
  • the second information is used to indicate the correspondence between the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device, and the first RLC entity corresponds to the second data radio bearer .
  • the first RLC entity corresponds to the second data radio bearer, which may mean that the data radio bearer of the first RLC entity of the second communication device corresponds to the second data radio bearer of the first communication device, or in other words, the first RLC entity
  • the entity's data radio bearer (for example, marked as SL DRB ID1) and the second data radio bearer of the first communication device maintain the same logical channel.
  • the second communication device receives the second information.
  • the network device configures the corresponding relationship between the first data radio bearer and the second data radio bearer to the first communication device, so that the first communication device knows that the communication is performed through the first data radio bearer and the second data radio bearer. Relay transmission between the network equipment and the second communication device.
  • the network device configures the second communication device with the correspondence between the RLC entity of the SL interface corresponding to the second data radio bearer and the PDCP entity of the Uu interface, and the second communication device can efficiently determine the PDCP entity.
  • the above communication method improves the data transmission efficiency of L2 relay communication.
  • the first information may be sent to the first communication device during the process of configuring the data radio bearer of the first communication device.
  • the first information may be sent together with the configuration information of the first data radio bearer and the configuration information of the second data radio bearer.
  • the first information may also be sent in a process other than the process of configuring the data radio bearer of the first communication device, which is not specifically limited in this application.
  • the network device may configure respective data radio bearers of the first communication device and the second communication device.
  • the network equipment may be configured with the first data radio bearer and the second data radio bearer respectively.
  • the network device may be configured with a data radio bearer including the first RLC entity.
  • the data radio bearer is a data radio bearer between the second communication device and the first communication device, and the data radio bearer is connected to the first communication device.
  • the second data radio bearer maintains the same logical channel.
  • the first data radio bearer and the second data radio bearer configured by the network device for the first communication device in this application do not include a PDCP entity.
  • the first data radio bearer and the second data bearer may respectively include the RLC entity, MAC entity (or configuration), and PHY entity of the SL interface between the network device and the first communication device, but do not include the PDCP entity.
  • the data radio bearer configured by the network device for the third communication device in this application does not include a PDCP entity.
  • the data radio bearer configured by the network device for the third communication device may include the RLC entity, MAC entity, and PHY entity of the SL interface between the network device and the first communication device, but does not include the PDCP entity.
  • the radio bearer configured by the network device for the second communication device in this application may include the RLC entity of the SL interface between the second communication device and the first communication device (such as the first communication device). RLC entity), MAC entity and PHY entity.
  • the radio bearer configured by the network device for the second communication device may also include a PDCP entity of the Uu interface between the second communication device and the network device.
  • the data radio bearer configured by the network device for the second communication device may also include an RRC entity and a NAS entity of the control plane, and optionally an SDAP entity that may include a user plane.
  • the correspondence between the first data radio bearer and the second data radio bearer can be expressed as the RLC entity of the Uu interface of the first communication device included in the first data radio bearer, and the second data radio bearer Correspondence between the RLC entities of the SL interface of the first communication device included.
  • the corresponding relationship between the first data radio bearer and the second data radio bearer can be expressed as the relationship between the logical channel of the Uu interface corresponding to the first data radio bearer and the logical channel of the SL interface corresponding to the second data radio bearer.
  • the logical channel of the Uu interface corresponding to the first data radio bearer is jointly maintained by the RLC entity of the Uu interface of the network device and the RLC entity of the Uu interface of the first communication device included in the first data radio bearer, as shown in FIG. 3 ,
  • the logical channel of the Uu interface corresponding to the first data radio bearer is Uu_LCH_1.
  • the logical channel of the SL interface corresponding to the second data radio bearer is jointly maintained by the RLC entity of the SL interface of the first communication device and the RLC entity of the SL interface of the first communication device included in the second data radio bearer, as shown in FIG. 3 ,
  • the logical channel of the SL interface corresponding to the second data radio bearer is SL_LCH_1.
  • the logical channel of the SL interface corresponding to the second data radio bearer can be combined with the logical channel identifier and the source identifier (source ID, SRC/SRC ID) (or source identifier index) of the logical channel, and destination identifier (destination ID, DST/ DST ID) (or destination identification index) or one or more of the channel type (cast-type) identification.
  • the source identifier of the logical channel is the identifier of the terminal device that sends data through the logical channel, such as SL L2 ID, SL L1 ID or other UE identifiers.
  • the source identifier index may be used to indicate the source identifier of the logical channel, for example, it may be an index value corresponding to the source identifier.
  • the purpose identifier of the logical channel is the identifier of the SL interface of the terminal device that receives data through the logical channel, such as SL L2 ID, SL L1 ID or other UE identifiers.
  • the target identifier index may be used to indicate the target identifier of the logical channel, for example, it may be an index value corresponding to the target identifier.
  • the channel type identifier of the logical channel can be used to indicate that the logical channel is used for unicast, multicast, or broadcast. That is to say, in the embodiment of the present application, SL_LCH_1 and/or SL_LCH_2 can be used to communicate through unicast, multicast or broadcast.
  • the logical channel of the Uu interface corresponding to the first data radio bearer (that is, the logical channel Uu_LCH_1 shown in FIG. 3) and the SL interface corresponding to the second data radio bearer can be used
  • the corresponding relationship between the logical channels (that is, the logical channel SL_LCH_1 as shown in Figure 3) represents the corresponding relationship between the first data radio bearer and the second data radio bearer, where the logical channel of the SL interface can pass through the logical channel And the source identifier and/or destination identifier of the logical channel.
  • the first communication device may store the configuration table (or routing table) shown in FIG. 5 to store the corresponding relationship.
  • the configuration table may include the identification of the logical channel Uu_LCH_1 (such as Uu_LCH_ID1), the identification of the logical channel SL_LCH_1 (such as SL_LCH_ID1), and the source identification or destination identification of the logical channel SL_LCH_1 between the network device and the first communication device, and Any one or more of the communication type identifiers (such as unicast, multicast, and broadcast) are used to indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the communication type identifiers such as unicast, multicast, and broadcast
  • the first information may be configuration information corresponding to the configuration table, and the first information may carry any one or more of the identification of the logical channel Uu_LCH_1, the identification of the logical channel SL_LCH_1, and the source identification or the destination identification of the logical channel SL_LCH_1.
  • (SRC+DST+communication type identification) shown in FIG. 5 means that part or all of the SRC, DST, or communication type identification can be carried, and it is not necessary to carry SRC, DST, and communication type identification at the same time.
  • the network device can be configured separately for each relay terminal device The corresponding relationship between the data radio bearer that receives the data and the data radio bearer that sends the data to the next terminal device to improve the reliability of data transmission and improve the transmission efficiency.
  • the correspondence between the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device shown in S102 can be expressed as the first RLC entity of the Uu interface of the second communication device.
  • the correspondence between the PDCP entity and the logical channel maintained by the first RLC entity can be expressed as the first RLC entity of the Uu interface of the second communication device.
  • the second communication device may store the correspondence between the first PDCP entity and the first RLC entity and/or the logical channel maintained by the first RLC entity according to the second information.
  • the second communication device may configure the information of the first RLC entity in the first PDCP entity according to the second information to realize the binding of the first PDCP entity of the Uu interface and the first RLC entity of the SL interface.
  • the second information can be used to configure the configuration table as shown in FIG. 6 for a solution in which the network device transmits between the first communication device and the second communication device.
  • the second communication device can perform SL cell group (CG) configuration in the PDCP entity configuration of the Uu interface of the second communication device.
  • the SL cell group configuration can be marked as SLCG ID1.
  • the second communication device may also store the information of the first RLC entity in the configuration corresponding to SLCG ID1, such as storing the data radio bearer identification of the first RLC entity (such as SLDRB ID1), and the first RLC entity in the configuration corresponding to SLCG ID1.
  • the above first information can be carried in the RRC signaling sent by the network device to the first communication device, or can be carried in each of the RRC signaling sent by the network device to the first communication device that needs to be relayed to the second communication device.
  • the second information can be carried in the RRC signaling sent by the network device to the second communication device, or can be carried in each data packet sent by the network device to the second communication device through the first communication device, so as to achieve the corresponding Flexible configuration of relationships.
  • the network device may also send third information to the third communication device,
  • the third information is used to indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network equipment and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the network device may also send fourth information to the second communication device for indicating the correspondence between the first PDCP entity of the Uu interface of the second communication device and the second RLC entity of the SL interface of the second communication device, Wherein, the second RLC entity corresponds to the fourth data radio bearer.
  • the first PDCP entity of the Uu interface of the second communication device is simultaneously associated with the first RLC entity and the second RLC entity of the SL interface of the second communication device. Therefore, the same PDCP entity of the Uu interface can handle multiple SLs.
  • the data of the RLC entity of the interface makes it possible to introduce repeated transmission and offload transmission in L2 relay communication.
  • the network equipment may also configure a third data radio bearer and a fourth data radio bearer to the third communication apparatus, where the third data radio bearer does not include the PDCP entity of the third communication apparatus, and the fourth data radio bearer does not include The PDCP entity of the third communication device.
  • the above-mentioned way of indicating the correspondence between the third data radio bearer and the fourth data radio bearer may refer to the way of indicating the relationship between the first data radio bearer and the second data radio bearer in this application.
  • the third information can carry any one or more of the identifier of the logical channel Uu_LCH_2 of the Uu interface, the identifier of the logical channel SL_LCH_2 of the SL interface, and the source identifier or the destination identifier of the logical channel SL_LCH_2. To indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the fourth information can carry any one or more of the identity of the first PDCP entity, the identity of the logical channel SL_LCH_2 of the SL interface, and the source identity or destination identity of the logical channel SL_LCH_2 to indicate Correspondence between the first PDCP entity and the second RLC entity.
  • the second communication device may configure the configuration table shown in FIG. 7 according to the second information and the fourth information.
  • the second communication device can configure the SL cell group in the PDCP entity configuration of the Uu interface of the second communication device, where the cell group configuration flag set according to the second information is SL CG ID1, SLCG ID1 configuration content Please refer to the introduction to FIG. 6 in this application.
  • the second communication device can configure SLCG ID2 according to the fourth information.
  • the configuration of SLCG ID2 can store the data radio bearer identification of the second RLC entity (such as SLDRB ID2),
  • the second RLC entity maintains at least one of the identification of the logical channel SL_LCH_2 (such as SL_LCH_ID2), the source identification or the destination identification of the logical channel SL_LCH_2, to indicate the difference between the first PDCP entity of the Uu interface of the second communication device and the SL interface Correspondence between the first RLC entities.
  • the PDCP entity of the Uu interface of the second communication device is associated with the RLC entities of the two SL interfaces.
  • the above third information can be carried in the RRC signaling sent by the network equipment to the third communication device, or the third information can be carried in each device that needs to be relayed to the second communication device and sent by the network device to the third communication device.
  • the fourth information may be carried in the RRC signaling sent by the network device to the second communication device, or the fourth information may be carried in each data packet sent by the network device to the second communication device through the third communication device, In order to realize the flexible configuration of the corresponding relationship.
  • the third information may be sent to the first communication device during the process of configuring the wireless data bearer of the third communication device.
  • the third information may be sent together with the configuration information of the third data radio bearer and the configuration information of the fourth data radio bearer.
  • the third information may also be sent in a process other than the process of configuring the wireless data bearer of the third communication device, which is not specifically limited in this application.
  • the network device can send data to the network device through the first information.
  • the first communication device indicates the correspondence between Uu_LCH_1 and SL_LCH_1, and indicates to the second communication device the correspondence between the first PDCP entity of the Uu interface and the first RLC entity of the SL interface through the second information, where the first The RLC entity is used to maintain SL_LCH_1.
  • the network device may also indicate the correspondence between Uu_LCH_2 and SL_LCH_2 to the third communication device through the third information, and indicate to the second communication device whether the first PDCP entity of the Uu interface and the second RLC entity of the SL interface are related to each other through the fourth information. Correspondence between the two entities, where the second RLC entity is used to maintain SL_LCH_2, for example, to process data received by Uu_LCH_2.
  • the network device first copies the data packet that needs to be sent into two copies, and sends the first data packet to the first communication device through Uu_LCH_1.
  • the first data packet is sent to the second communication device through SL_LCH_1
  • the first RLC entity of the second communication device receives the first data packet through SL_LCH_1.
  • the network device also sends the second data packet to the third communication device via Uu_LCH_2, and the first communication device sends the second data packet to the second communication device via SL_LCH_2, and the second RLC entity of the second communication device Receive the second data packet through SL_LCH_2.
  • the second communication device may hand over the first data packet received through SL_LCH_1 and the first data packet received through SL_LCH_2 to the first PDCP entity for processing, and the first PDCP entity will process the first data packet according to the first data packet and the first data packet received through SL_LCH_2.
  • Two data packets perform repeated detection and reordering of data packets, for example, a complete and sorted data packet is obtained according to the first data packet and the second data packet, and then the data packet is delivered to the second communication on demand Upper processing of the device. Since the second communication device receives the same data packet through the first communication device and the third communication device during repeated transmission, the reliability of data packet transmission can be improved.
  • the network device When performing offload transmission, the network device first splits the data packet that needs to be sent into two parts, and sends the first part of the data packet to the first communication device through Uu_LCH_1, and the first communication device according to the corresponding relationship between Uu_LCH_1 and SL_LCH_1 , The first data packet is sent to the second communication device through SL_LCH_1, and the first RLC entity of the second communication device receives the first data packet through SL_LCH_1.
  • the network device also sends the second data packet to the third communication device via Uu_LCH_2, and the first communication device sends the second data packet to the second communication device via SL_LCH_2, and the second RLC entity of the second communication device Receive the second data packet through SL_LCH_2. Thereafter, the second communication device may hand over the first data packet received through SL_LCH_1 and the second data packet received through SL_LCH_2 to the first PDCP entity for processing, and the first PDCP entity will process the first data packet according to the first data packet and the first data packet. Two data packets are used for repeated detection and reordering of data packets.
  • the first data packet and the second data packet are combined to obtain a complete and sorted data packet, and then the data packet is delivered to the second data packet as needed.
  • the upper layer processing of the communication device Since the second communication device receives different data packets through the first communication device and the third communication device during offload transmission, the length of the transmission queue of the data packet is reduced, thereby improving the efficiency of data packet transmission and increasing the transmission rate.
  • the terminal When performing uplink transmission, the terminal can copy the data that needs to be transmitted (corresponding to repeated transmission) or offload (corresponding to offload transmission), and send them through SL_LCH_1 and SL_LCH_2 respectively.
  • the first communication device sends the data from SL_LCH_1 to the network device via Uu_LCH_1, and the second communication device sends the data from SL_LCH_2 to the network device via Uu_LCH_2, and then the network device combines the data from Uu_LCH_1 and Uu_LCH_2.
  • the network device can send data packets to the first communication device and the third communication device through the Uu interface in a unicast manner, where the data packets sent by each communication device
  • the data packet can be scrambled by the identifier of each communication device (such as cell-radio network temporary identifier (C-RNTI)).
  • C-RNTI cell-radio network temporary identifier
  • the network device can also send data packets through multicast.
  • the network device may regard the first communication device and the third communication device as a group of communication devices, and send data packets to the group of communication devices, wherein the data packets sent by multicast are communicated through the group.
  • the group identifier of the device (such as group-radio network temporary identifier (G-RNTI)) is scrambled.
  • the network device can use the first communication device as a group of communication devices and the third communication device as another group of communication devices, so as to send to the first communication device and the third communication device respectively through multicast. Different packets.
  • Uu_LCH_1 and/or Uu_LCH_2 used by the network device to transmit data may be a multicast logical channel.
  • network devices can also send data through the Uu interface by broadcasting.
  • the network device may also communicate with the second communication device.
  • the second communication device sends fifth information, which may be used to indicate the correspondence between the first PDCP entity of the Uu interface of the second communication device and the third RLC entity of the Uu interface of the second communication device, where the first The third RLC entity corresponds to the fifth data radio bearer of the second communication device, and the fifth data radio bearer is used by the second communication device to communicate with the network device through the Uu interface.
  • the fifth information can carry the identity of the first PDCP entity, the identity of the logical channel Uu_LCH_3 that carries the Uu interface and/or the identity of the data radio bearer of the Uu interface corresponding to the third RLC entity (e.g. Uu DRB ID1) to indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the second communication device may configure the configuration table shown in FIG. 8 according to the second information and the fifth information.
  • the second communication device can configure the SL cell group in the PDCP entity configuration of the Uu interface of the second communication device, where the cell group configuration flags set according to the second information are SL CG ID1, SL CG ID1 configured in For the content, please refer to the introduction to FIG. 6 in this application.
  • the second communication device can configure SLCG ID3 according to the fifth information.
  • the configuration of SLCG ID3 can store the identity of the third RLC entity's data radio bearer (such as UuDRB ID3), and /Or store the identifier of the logical channel Uu_LCH_3 maintained by the third RLC entity (such as Uu_LCH_ID3) to indicate the correspondence between the first PDCP entity of the Uu interface of the second communication device and the third RLC entity of the Uu interface.
  • the PDCP entity of the Uu interface of the second communication device is respectively associated with an RLC entity of an SL interface and an RLC entity of a Uu interface.
  • the above fifth information can be carried in the RRC signaling sent by the network device to the second communication device, or the fifth information can be carried in each data packet sent by the network device to the second communication device through the Uu interface, so as to achieve the corresponding Flexible configuration of relationships.
  • the network device can transmit data to the second communication device through the first communication device and through the Uu interface, respectively, and therefore can realize repeated transmission and/or split transmission of data according to this architecture.
  • the network device when the network device and the second communication device are relayed through the first communication device and data transmission is performed through the Uu interface, according to the communication method provided in the embodiment of the present application, the network device can pass through the first communication device.
  • the information indicates the correspondence between Uu_LCH_1 and SL_LCH_1 to the first communication device, and indicates the correspondence between the first PDCP entity of the Uu interface and the first RLC entity of the SL interface to the second communication device through the second information, wherein, The first RLC entity is used to maintain SL_LCH_1.
  • the network device may also indicate the correspondence between the first PDCP entity of the Uu interface and the third RLC entity of the Uu interface to the second communication device through the fifth information, where the third RLC entity is used to maintain Uu_LCH_3, for example, to receive Uu_LCH_3 Data to be processed.
  • the network device first copies the data packet that needs to be sent into two copies, and sends the first data packet to the first communication device through Uu_LCH_1.
  • the first data packet is sent to the second communication device through SL_LCH_1
  • the first RLC entity of the second communication device receives the first data packet through SL_LCH_1.
  • the network device also sends a second data packet therein to the second communication device via Uu_LCH_3, and the third RLC entity of the second communication device receives the second data packet via Uu_LCH_3.
  • the second communication device can hand over the first data packet received through SL_LCH_1 and the first data packet received through Uu_LCH_3 to the first PDCP entity for processing, and the first PDCP entity will process the first data packet according to the first data packet and the first data packet.
  • Two data packets perform repeated detection and reordering of data packets, for example, a complete and sorted data packet is obtained according to the first data packet and the second data packet, and then the data packet is delivered to the second communication on demand Upper processing of the device. Since the second communication device receives the same data packet through the relay and Uu interface of the first communication device during repeated transmission, the probability of packet loss in the same data packet is reduced, and thus the reliability of data packet transmission can be improved.
  • the network device When performing offload transmission, the network device first splits the data packet that needs to be sent into two parts, and sends the first part of the data packet to the first communication device through Uu_LCH_1, and the first communication device according to the corresponding relationship between Uu_LCH_1 and SL_LCH_1 , The first data packet is sent to the second communication device through SL_LCH_1, and the first RLC entity of the second communication device receives the first data packet through SL_LCH_1. In addition, the network device also sends a second data packet to the second communication device via Uu_LCH_3, and the third RLC entity of the second communication device receives the second data packet via Uu_LCH_3.
  • the second communication device may hand over the first data packet received through SL_LCH_1 and the second data packet received through Uu_LCH_3 to the first PDCP entity for processing, and the first PDCP entity can process the first data packet according to the first data packet and the first data packet.
  • Two data packets are used for repeated detection and reordering of data packets. For example, the first data packet and the second data packet are combined to obtain a complete and sorted data packet, and then the data packet is delivered to the second data packet as needed.
  • the upper layer processing of the communication device Since the second communication device receives different data packets through the relay and Uu interface of the first communication device during offload transmission, the length of the transmission queue of the data packet is reduced, thereby improving the efficiency of data packet transmission and increasing the transmission rate.
  • the terminal When performing uplink transmission, the terminal can copy the data that needs to be transmitted (corresponding to repeated transmission) or offload (corresponding to offload transmission), and send them through SL_LCH_1 and Uu_LCH_3, respectively.
  • the first communication device sends the data from SL_LCH_1 to the network device through Uu_LCH_1, and then the network device combines the data from Uu_LCH_1 and Uu_LCH_3.
  • the second communication device In another communication method provided by an embodiment of the present application, as shown in FIG. 1 or FIG. 3, if the network device and the second communication device can communicate with each other through the relay of the first communication device, the second communication device An indication may be carried in the data sent to the first communication device for the first communication device to determine whether the data needs to be sent to the network device.
  • the second communication device may fill in different data for the data sent to the first communication device but not required to be sent to the network device and for the data sent to the first communication device and need to be forwarded to the network device by the first communication device.
  • Source ID, and/or respectively fill in the same source ID but different destination IDs.
  • Table 1 when the data from the second communication device carries the active identifier SRC1, it means that the data needs to be relayed to the network equipment, then the first communication device can send the data to the network equipment; when it comes from the second communication device When the data carries the active identifier SRC2, it means that the data does not need to be relayed to the network device, and the first communication device does not need to send the data to the network device. At this time, the first communication device can submit the data to the upper layer for processing.
  • the first communication device and the second communication device can compare the source identification and/or destination identification shown in Table 1 with whether the data needs to be transferred or not.
  • the correspondence between the judgment results relayed to the network equipment is negotiated and a consensus is reached.
  • multiple (for example, two) unicast connections can be established between the first communication device and the second communication device, wherein during the establishment of each unicast connection, the first communication device and the second communication device can be separately established.
  • the source identification and/or destination identification (such as The source identification and destination identification shown in #1 and/or #3 in Table 1); the second communication device and the second communication device do not need to send the source identification and/or destination identification to the network device (as shown in Table 1 #2 and/or #4 (source identification, destination identification) to negotiate.
  • a buffer status report (buffer status report, BSR) can be sent to the network device in the following manner.
  • Manner 1 The second communication device reports an uplink BSR to the network device through the Uu interface between it and the network device, and the uplink BSR is used to request uplink transmission authorization.
  • the network device can determine how to send the uplink transmission authorization to the second communication device according to its own decision. Specifically, the network device may send the uplink transmission authorization to the second communication device through the Uu interface between it and the second communication device. Alternatively, the network device may send the SL transmission authorization to the second communication device through the first communication device, and the SL transmission authorization may be used by the second communication device to send data to the first communication device; at the same time, the network device may send uplink data to the first communication device. Transmission authorization, where the uplink transmission authorization is used by the first communication device to uplink data from the second communication device to the network device.
  • Method 2 The second communication device reports an SL BSR to the network device through the Uu interface between it and the network device.
  • the SL BSR is used to request SL transmission authorization
  • the SL transmission authorization is used by the second communication device to the first communication device.
  • the second communication device may indicate in an explicit or implicit manner that the data needs to be relayed to the network device.
  • the network device can send the SL transmission authorization to the second communication device through the first communication device, and the SL transmission authorization can be used by the second communication device to send data to the first communication device; at the same time, the network device can send data to the first communication device.
  • Send an uplink transmission authorization where the uplink transmission authorization is used by the first communication device to uplink data from the second communication device to the network device.
  • the SL BSR may carry indication information, which is used to indicate that the data corresponding to the SL BSR needs to be relayed to the network device.
  • the second communication device may carry specific information in the SLBSR for the network device to determine that the data corresponding to the SLBSR needs to be relayed to the network device.
  • the DST L2 Id carried in the SL BSR is the address in Table 1 that needs to be sent to the network device (such as DST1), so the network device knows that the data needs to be relayed to the network device based on the address.
  • the network device can learn from the information reported by the first communication device that when the SL BSR carries specific information, it means that the data corresponding to the SL BSR needs to be relayed to the network device; or, the network device can obtain information from the mobility management entity (mobility management). Entity, MME) or access and mobility management function (access and mobility management function, AMF) and other core network network elements obtain the address (such as DST1) that needs to be sent to the network device in Table 1, and these network elements can use RRC information Let the address be obtained from the first communication device and/or the second communication device.
  • mobility management entity mobility management
  • MME mobility management entity
  • AMF access and mobility management function
  • Manner 3 The second communication device reports the SL BSR to the network device through the Uu interface between it and the network device.
  • the SL BSR is used to request SL transmission authorization
  • the SL transmission authorization is used by the second communication device to the first communication device.
  • the second communication device can indicate in an explicit or implicit manner that the data does not need to be relayed to the network device.
  • the network device may send the SL transmission authorization to the second communication device through the first communication device, and the SL transmission authorization is only used for the second communication device to send data to the first communication device.
  • the second communication device when the second communication device needs to transmit data to the first communication device, and the first communication device does not need to send the data to the network device, the second communication device can report the SL BSR to the network device and instruct the Data does not need to be relayed to network equipment.
  • the SL BSR may carry indication information, which is used to indicate that the data corresponding to the SL BSR does not need to be relayed to the network device.
  • the SL BSR may carry specific information, which is used by the network device to determine that the data corresponding to the SL BSR does not need to be relayed to the network device.
  • the specific information may include a specific DST L2 Id.
  • the specific method of setting the SL BSR please refer to the setting method of the SL BSR when the data needs to be relayed to the network device in the second method.
  • the network device after the network device receives the BSR from the second communication device through the Uu interface, or receives the BSR from the second communication device through the relay of the first communication device, the network device can send to the second communication device through the following methods Transmission authorization.
  • the network device can send an uplink transmission authorization to the second communication device through the Uu interface or through the relay of the second communication device.
  • the uplink transmission authorization can be used by the second communication device to send uplink data to the network device through the Uu interface.
  • Method 2 The network device can send the SL transmission authorization to the second communication device through the Uu interface or through the relay of the second communication device, and the SL transmission authorization is only used for the second communication device to send data to the first communication device through the SL interface .
  • the first communication device requests an uplink authorization from the network device, and the uplink authorization is used by the first communication device to relay data from the second communication device to the network device.
  • the network device can send SL transmission authorization and uplink transmission authorization to the second communication device through the Uu interface, where the SL transmission authorization is used by the second communication device to send data to the first communication device through the SL interface, and the uplink transmission authorization is used for The first communication device relays the data to the network equipment.
  • the uplink transmission authorization may be limited to only be used to relay data transmitted between the first communication device and the second communication device through the SL interface to the network device.
  • the network device sends the SL transmission authorization and the uplink transmission authorization to the second communication device through downlink control information (DCI).
  • DCI downlink control information
  • the second communication device may send the uplink transmission authorization to the first communication device. Communication device.
  • the network device can send the SL transmission authorization to the second communication device through the Uu interface, and send the uplink authorization to the first communication device through the Uu interface.
  • the uplink authorization may be limited to only being used to relay data transmitted between the first communication device and the second communication device through the SL interface to the network device.
  • the data carries the identifier shown in #1 or #3 in Table 1.
  • the network device can send the SL transmission authorization to the second communication device.
  • the SL transmission authorization can follow the existing SL transmission authorization method.
  • the SL transmission authorization may be limited to only transmitting data between the first communication device and the second communication device through the SL interface.
  • the network device can use any one of methods 1 to 4 to perform uplink authorization.
  • the network device can adopt the method 5. Perform SL authorization.
  • the method provided by the embodiments of the present application is introduced from the perspective of the functions implemented by the network equipment, the first communication device, the second communication device, and the third communication device.
  • the network device, the first communication device, the second communication device, and the third communication device may include a hardware structure and/or a software module, and a hardware structure, a software module, or
  • the above-mentioned functions are realized in the form of hardware structure and software modules. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • a communication device may include a communication module 901 and a processing module 902, and the communication module 901 and the processing module 902 are coupled with each other.
  • the communication device 900 can be used to perform the steps performed by the network device in the above method embodiments.
  • the communication module 901 may be used to support the communication device 900 to communicate, and the communication module 901 may also be referred to as a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 901 may have a wireless communication function, for example, it can communicate with other communication devices through a wireless communication method.
  • the processing module 902 can also be referred to as a processing unit, and can be used to support the communication device 900 to perform the processing actions of the network device in the foregoing method embodiments, including but not limited to: generating information and messages sent by the communication module 901, and/or, The signal received by the communication module 901 is demodulated, decoded, and so on.
  • the above communication module 901 can be used to perform the sending and/or receiving actions of the network device in the above method embodiment.
  • the processing module 902 may be used to perform processing actions of the network device in the foregoing method embodiment, such as controlling the communication module 901 to receive and send information, messages or signaling, and to store information.
  • the communication module 901 may be used to send the first information to the first communication device.
  • the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is the data radio bearer between the network device and the first communication device
  • the second data radio bearer is the data radio bearer between the network device and the first communication device.
  • the radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the communication module 901 may also be used to send second information to the second communication device.
  • the second information may indicate the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device. The corresponding relationship between the first RLC entity corresponds to the second data radio bearer.
  • the first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the above first data radio bearer does not include the PDCP entity of the first communication device, and the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module 901 may also send third information to the third communication device, and the third information may indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network device and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the communication module 901 may also send fourth information to the second communication device.
  • the fourth information may indicate the correspondence between the first PDCP entity and the second RLC entity of the SL interface of the second communication device.
  • the two RLC entities correspond to the fourth data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the communication module 901 may also send fifth information to the second communication device, and the fifth information may indicate the difference between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device. Correspondence between.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the communication device may also be composed of hardware components. It is easy to understand and easy to illustrate.
  • a base station is taken as an example to illustrate the structure of a communication device composed of hardware components.
  • the communication device 1000 may include a processor 1022, a memory 1021, and a transceiver.
  • the communication device 1000 includes one or more remote radio units (RRU) 1010 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1020.
  • the RRU 1010 may be referred to as a communication module, which may correspond to the communication module 901 in FIG. 9, and is used to perform the steps performed by the communication module 901 above.
  • the RRU 1010 may also be called a transceiver, a transceiver circuit or a transceiver, etc., and it may include at least one antenna 1011 and a radio frequency unit 1012.
  • the RRU 1010 can be used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, sending the first information provided in the embodiment of the present application.
  • the RRU 1010 can be regarded as a transceiver, and the radio frequency unit 1012 can also be regarded as a transceiver.
  • the RRU 1010 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter or transmitting circuit).
  • the BBU 1020 can be used to perform baseband processing, such as channel coding, multiplexing, modulation, spread spectrum, etc., and to control the base station.
  • the RRU 1010 and the BBU 1020 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1020 is the control center of the base station, and may also be referred to as a processing module, a processing unit, etc., which may correspond to the processing module 902 in FIG. 9 and is used to perform the steps performed by the processing module 902 above.
  • the BBU 1020 can also be used to perform baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU 1020 may be used to control the network device to execute the operation process of the network device in the foregoing method embodiment, for example, to generate first information.
  • the BBU 1020 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network with a single access standard (such as an LTE network), and can also support wireless access networks with different access standards. Access network (such as LTE network, 5G network or other network).
  • the BBU 1020 also includes a memory 1021 and a processor 1022.
  • the memory 1021 is used to store necessary computer programs or instructions, and data.
  • the processor 1022 is used to control the network device to perform necessary actions, for example, to control the network device to execute the operation procedure executed by the CU and/or the CU in the foregoing method embodiment.
  • the above steps executed by the processing module 902 may be executed by the processor 1022.
  • the memory 1021 and the processor 1022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the network equipment is not limited to the above forms, and may also be in other forms: for example, including BBU and adaptive radio unit (ARU), or BBU and active antenna unit (AAU); or Customer premises equipment (CPE) may also be in other forms, which is not limited by this application.
  • ARU BBU and adaptive radio unit
  • AAU BBU and active antenna unit
  • CPE Customer premises equipment
  • the above-mentioned BBU 1020 may be used to perform the processing actions described in the foregoing method embodiments that are implemented internally by the network device.
  • the RRU 1210 (or the radio frequency unit 1012) may be used to perform the sending action of the network device to the first communication device and the like described in the foregoing method embodiment.
  • the RRU 1210 may be used to send the first information to the first communication device.
  • the first information may indicate the correspondence between the first data radio bearer and the second data radio bearer.
  • the first data radio bearer is the data radio bearer between the network device and the first communication device
  • the second data radio bearer is the data radio bearer between the network device and the first communication device.
  • the radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the RRU 1210 may also be used to send second information to the second communication device, and the second information may indicate whether the first PDCP entity of the Uu interface of the second communication device and the first RLC entity of the SL interface of the second communication device are In the corresponding relationship between the two, the first RLC entity corresponds to the second data radio bearer.
  • the first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the above first data radio bearer does not include the PDCP entity of the first communication device, and the second data radio bearer does not include the PDCP entity of the first communication device.
  • the RRU 1210 may also send third information to the third communication device, and the third information may indicate the correspondence between the third data radio bearer and the fourth data radio bearer.
  • the third data radio bearer is a data radio bearer between the network device and the third communication device
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device.
  • the RRU 1210 may also send fourth information to the second communication device.
  • the fourth information may indicate the correspondence between the first PDCP entity and the second RLC entity of the SL interface of the second communication device.
  • the RLC entity corresponds to the fourth data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the RRU 1210 may also send fifth information to the second communication device, and the fifth information may indicate the communication between the first PDCP entity and the third RLC entity of the Uu interface of the second communication device The corresponding relationship.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • a communication device may include a communication module 1101 and a processing module 1102, and the communication module 1101 and the processing module 1102 are coupled with each other.
  • the communication device 1100 may be used to perform the steps performed by the first communication device and/or the second communication device in the above method embodiments.
  • the communication module 1101 can be used to support the communication device 100 to communicate.
  • the communication module 1101 can also be called a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 1101 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 1102 can also be referred to as a processing unit, and can be used to support the communication device 1100 to perform the processing actions of the first communication device and/or the second communication device in the foregoing method embodiments, including but not limited to: generating and sending by the communication module 1101 Information, messages, and/or demodulation and decoding of the signal received by the communication module 1101, etc.
  • the above communication module 1101 can be used to perform the sending and receiving of the first communication device and/or the second communication device in the above method embodiment. / Or the act of receiving, such as receiving information, messages or signaling from a network device.
  • the processing module 1102 can be used to perform the processing actions of the first communication device and/or the second communication device in the foregoing method embodiments, such as controlling the communication module 101 to receive and send information, messages, or signaling, and perform information processing. Storage and other operations.
  • the communication module 1101 may receive first information from the network device, and the first information may indicate the first data radio bearer and the second data radio bearer Correspondence between.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device
  • the second data radio bearer is a data radio bearer between the first communication device and a second communication device
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the first RLC entity of the SL interface of the communication device corresponds to the second data radio bearer
  • the first PDCP entity of the Uu interface of the second communication device corresponds to the first RLC entity of the SL interface.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module 1101 may also receive data from the network device through the first data radio bearer, and send the data to the second communication device through the second data radio bearer.
  • the communication module 1101 may also receive data from the second communication device through the second data radio bearer, and send the data to the network device through the first data radio bearer.
  • the above first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the communication module 1101 may receive second information from the network device, and the second information may indicate the first PDCP entity of the Uu interface of the second communication device Correspondence between the first RLC entity of the SL interface of the second communication device.
  • the first RLC entity corresponds to a second data radio bearer.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device. A first data radio bearer, and the first data radio bearer corresponds to the second data radio bearer.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the communication module 1101 may also receive fourth information from the network device, where the fourth information is used to indicate the second RLC entity of the SL interface of the first PDCP entity and the second communication device.
  • the fourth information is used to indicate the second RLC entity of the SL interface of the first PDCP entity and the second communication device.
  • the second RLC entity corresponds to a fourth data radio bearer
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device
  • the maintenance between the third communication device and the network device There is a third data radio bearer
  • the fourth data radio bearer corresponds to the third data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the communication module 1101 may also receive fifth information from the network device, where the fifth information is used to indicate one of the third RLC entities of the Uu interface between the first PDCP entity and the second communication device. Correspondence between.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the communication device may also be composed of hardware components. It is easy to understand and easy to illustrate.
  • a mobile phone is taken as an example to illustrate the structure of the first communication device and/or the second communication device or the time communication device 1200 composed of hardware components.
  • the communication device 1200 may include a processor 1201, a memory 1202, and a transceiver 1203.
  • the processor 1201, the transceiver 1203, and the memory 1202 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the memory 1202 is used to store computer programs.
  • the processor 1201 is used to call and run the computer program from the memory 1202 to control the transceiver 1203 to send and receive signals.
  • the above processor 1201 can be used to process the communication protocol and communication data, and to control the communication device 1000, execute a program, process data of the program, and so on.
  • the memory 1202 may be used to store programs and data, and the processor 1201 may execute the method executed by the receiving end device in the embodiments of the present application based on the program.
  • the above transceiver 1203 may correspond to the communication module 1101 in FIG. 11, and may also be referred to as a transceiver unit.
  • the transceiver 1203 may include a receiver (or called a receiver, a receiving circuit) and a transmitter (or called a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.
  • the transceiver 1203 may specifically include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the radio frequency unit can also be regarded as the transceiver 1203, then the communication device 1200 can include a processor 1201, a memory 1202, a transceiver 1203, and an antenna at this time.
  • the communication device 1200 may further include an input and output device 1204, such as a touch screen, a display screen, or a keyboard, etc., which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.
  • the foregoing processor 1201 and the memory 1202 may be combined as a processing device, and the processor 1201 is configured to execute a computer program or instruction stored in the memory 1202 to implement the foregoing functions.
  • the memory 1202 may also be integrated in the processor 1201 or independent of the processor 1201.
  • the above communication module 1101 may have the structure shown in the transceiver 1203, that is, include a radio frequency unit and an antenna; or, the communication module 1101 may include the above radio frequency unit.
  • the above processing module 1102 may include a processor 1201, or include a processor 1022 and a memory 1021.
  • the above communication device 1200 may also be constituted by a chip.
  • the chip includes a processor 1201.
  • the chip may also include a memory 1202 and a transceiver 1203, wherein any two of the memory 1202, the transceiver 1203, and the processor 1201 can be coupled to each other.
  • the transceiver 1203 can receive first information from the network device, and the first information can indicate the first data radio bearer and the first data radio bearer. 2. Correspondence between data radio bearers.
  • the first data radio bearer is a data radio bearer between the network device and the first communication device
  • the second data radio bearer is a data radio bearer between the first communication device and a second communication device
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • the first RLC entity of the SL interface of the communication device corresponds to the second data radio bearer
  • the first PDCP entity of the Uu interface of the second communication device corresponds to the first RLC entity of the SL interface.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the transceiver 1203 can also receive data from the network device through the first data radio bearer, and send the data to the second communication device through the second data radio bearer.
  • the transceiver 1203 can also receive data from the second communication device through the second data radio bearer, and send the data to the network device through the first data radio bearer.
  • the above first information may include the source identifier of the second data radio bearer and/or the destination identifier of the second data radio bearer.
  • the transceiver 1203 may receive second information from the network device, and the second information may indicate that the first PDCP entity of the Uu interface of the second communication device is connected to the first PDCP entity of the Uu interface of the second communication device.
  • the first RLC entity corresponds to a second data radio bearer.
  • the second data radio bearer is a data radio bearer between the first communication device and the second communication device.
  • a first data radio bearer, and the first data radio bearer corresponds to the second data radio bearer.
  • the first data radio bearer does not include the PDCP entity of the first communication device
  • the second data radio bearer does not include the PDCP entity of the first communication device.
  • the transceiver 1203 may also receive fourth information from the network device, where the fourth information is used to indicate the second RLC entity of the SL interface of the first PDCP entity and the second communication device.
  • the second RLC entity corresponds to a fourth data radio bearer
  • the fourth data radio bearer is a data radio bearer between the third communication device and the second communication device
  • the maintenance between the third communication device and the network device There is a third data radio bearer
  • the fourth data radio bearer corresponds to the third data radio bearer.
  • the third data radio bearer does not include the PDCP entity of the third communication device
  • the fourth data radio bearer does not include the PDCP entity of the third communication device.
  • the transceiver 1203 may also receive fifth information from the network device, where the fifth information is used to indicate one of the third RLC entities of the Uu interface between the first PDCP entity and the second communication device. Correspondence between.
  • the third RLC entity corresponds to a fifth data radio bearer, and the fifth data radio bearer is a data radio bearer between the network device and the second communication device.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • the program is executed by a processor, the computer executes the above method embodiment and method implementation.
  • this application also provides a computer program product, which may include a computer program or instruction, which when invoked and executed by a computer, enables the computer to implement the above method embodiment and method implementation An operation performed by the network device, the first communication device, and/or the second communication device in any one of the possible implementation manners of the example.
  • the present application also provides a chip or chip system, and the chip may include a processor.
  • the chip may also include a memory (or storage module) and/or a transceiver (or communication module), or the chip may be coupled with a memory (or storage module) and/or a transceiver (or communication module), wherein the transceiver ( (Or communication module) can be used to support the chip for wired and/or wireless communication, the memory (or storage module) can be used to store a program, and the processor can call the program to implement any one of the above method embodiments and method embodiments.
  • the chip system may include the above chips, or may include the above chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).
  • the present application also provides a communication system, which may include a network device, a first communication device, and/or a second communication device.
  • the communication system may be used to implement the operations performed by the network device, the first communication device, and/or the second communication device in any one of the foregoing method embodiments and method embodiments.
  • the communication system may have a structure as shown in FIG. 1 or FIG. 3.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • the network equipment in the foregoing device embodiments corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps.
  • the communication unit transmits the receiving or sending in the method embodiments.
  • other steps can be executed by the processing unit (processor).
  • the processing unit processor
  • the functions of specific units refer to the corresponding method embodiments. Among them, there may be one or more processors.
  • each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer programs or instructions.
  • These computer programs or instructions can be provided to the processor of a general-purpose computer, a dedicated computer, an embedded processor, or other programmable data processing equipment to produce a machine, so that the computer can be executed by the processor of the computer or other programmable data processing equipment
  • the program or instruction generates a device for realizing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer programs or instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the computer programs or instructions stored in the computer-readable memory produce the manufacturing of the instruction device.
  • the instruction device realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Abstract

本申请公开了一种通信方法及装置，由网络设备向第一通信装置配置了第一数据无线承载与第二数据无线承载之间的对应关系，以便第一通信装置获知通过第一数据无线承载以及第二数据无线承载进行网络设备与第二通信装置之间的中继传输。此外，由网络设备向第二通信装置配置了第二数据无线承载对应的SL接口的RLC实体与Uu接口的PDCP实体之间的对应关系，第二通信装置可高效地实现中继传输所采用的PDCP实体的确定。以上通信方法提高了L2中继通信的数据传输效率。

Description

一种通信方法及装置 技术领域
本申请涉及通信领域，特别涉及一种通信方法及装置。
背景技术
目前新无线(new radio，NR)通信技术中，提出终端的层2(layer 2，L2)中继(relay)通信，以支持网络设备与远端终端设备(即通过中继终端设备接入网络设备的终端设备)之间的控制面交互，以及支持网络设备与远端终端设备之间进行无线资源控制(radio resource control，RRC)信令的交互，从而提高中继通信中网络设备对于远端终端设备的通信保障。但目前并未明确该架构下网络设备与远端终端设备之间数据的传输过程，导致目前该场景下数据的传输过程效率不高。
目前在L2中继通信架构下，网络设备与远端终端设备之间的数据传输效率有待提高。
发明内容
本申请提供一种通信方法及装置，用于提高L2中继通信架构下，网络设备与远端终端设备之间的数据传输效率。
第一方面，本申请提供一种通信方法。该通信方法可由基站等网络设备或网络设备中的芯片执行。
根据该方法，可由网络设备向第一通信装置发送第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系，该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载；还可由该网络设备向该第二通信装置发送第二信息，该第二信息可指示该第二通信装置的通用用户和网络的接口(universal user to network interface，Uu接口)的第一包数据汇聚协议(packet data convergence protocol，PDCP)实体与该第二通信装置的侧链路(sidelink，SL)接口的第一无线链路控制(radio link control，RLC)实体之间的对应关系，该第一RLC实体对应于该第二数据无线承载。
采用以上方法，由网络设备向第一通信装置配置了第一数据无线承载与第二数据无线承载之间的对应关系，以便第一通信装置获知通过第一数据无线承载以及第二数据无线承载进行网络设备与第二通信装置之间的中继传输。此外，由网络设备向第二通信装置配置了第二数据无线承载对应的SL接口的RLC实体与Uu接口的PDCP实体之间的对应关系，第二通信装置可高效地实现中继传输所采用的PDCP实体的确定。以上通信方法提高了L2中继通信的数据传输效率。
示例性的，该第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
以上第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，该网络设备还可向第三通信装置发送第三信息，该第三信息可指示第三数据无线承载与第四数据无线承载之间的对应关系。该第三数据无线承载为该网 络设备与该第三通信装置之间的数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载。此外，该网络设备还可向该第二通信装置发送第四信息，该第四信息可指示第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系，该第二RLC实体对应于该第四数据无线承载。
采用以上设计，第一PDCP实体同时关联至SL接口的第一RLC实体以及第二RLC实体，因此，可由Uu接口的同一PDCP实体处理多个SL接口的RLC实体的数据，为在L2中继通信中引入重复传输和分流传输提供了可能。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在另一种可能的示例中，网络设备还可向第二通信装置发送第五信息，该第五信息可指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
采用以上设计，第一PDCP实体同时关联至SL接口的第一RLC实体以及Uu接口的第三RLC实体，因此，可由Uu接口的同一PDCP实体处理多个RLC实体的数据，为在L2中继通信中引入重复传输和分流传输提供了可能。
第二方面，本申请实施例提供一种通信方法。该方法可由第一通信装置或第一通信装置中的芯片执行。其中，第一通信装置可包括终端等中继设备，用于将第二通信装置中继至网络设备。
根据该方法，第一通信装置接收来自网络设备的第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系。该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载，该第二通信装置的SL接口的第一RLC实体对应于该第二数据无线承载，该第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
第一通信装置还可通过该第一数据无线承载，接收来自该网络设备的数据，以及通过该第二数据无线承载，向该第二通信装置发送该数据。
此外，第一通信装置还可通过该第二数据无线承载，接收来自该第二通信装置的数据，以及通过该第一数据无线承载，向该网络设备发送该数据。
以上第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
第三方面，本申请实施例提供一种通信方法。该方法可由第二通信装置或第二通信装置中的芯片执行。其中，第二通信装置可包括终端等设备，用于通过第一通信装置的中继与网络设备进行通信。
根据该方法，第二通信装置可接收来自该网络设备的第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系。该第一RLC实体对应于第二数据无线承载，该第二数据无线承载为第一通信装置与该第二通信装置之间的数据无线承载，该第一通信装置与该网络设备之间维护有第一数据无线承载，该第一数据无线承载对应于该第二数据无线承载。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，第二通信装置还可接收来自该网络设备的第四信息，该第四信息用于指示该第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系。该第二RLC实体对应于第四数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载，该第三通信装置与该网络设备之间维护有第三数据无线承载，该第四数据无线承载对应于该第三数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在一种可能的示例中，第二通信装置还可接收来自该网络设备的第五信息，该第五信息用于指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
第四方面，本申请实施例提供一种通信装置。该通信装置可用于执行上述第一方面或第一方面的任一可能的设计中由网络设备执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是网络设备或网络设备中的芯片。
在通过软件模块实现第四方面所示通信装置时，该通信装置可包括通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中网络设备的发送和/或接收的动作，如用于执行网络设备向第一通信装置、第二通信装置以及第三通信装置发送信息、消息或信令的动作。此外，处理模块可用于执行上述方法中网络设备的处理动作，如用于控制通信模块进行信息、消息或信令的接收和或发送，以及信息的处理和存储等操作。
具体的，通信模块可用于向第一通信装置发送第一信息。该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系，该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载。通信模块还可用于向该第二通信装置发送第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系，该第一RLC实体对应于该第二数据无线承载。
示例性的，该第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
以上第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，通信模块还可向第三通信装置发送第三信息，该第三信息可指示第三数据无线承载与第四数据无线承载之间的对应关系。该第三数据无线承载为该网络设备与该第三通信装置之间的数据无线承载，该第四数据无线承载为该第三通信装置与该 第二通信装置之间的数据无线承载。此外，通信模块还可向该第二通信装置发送第四信息，该第四信息可指示第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系，该第二RLC实体对应于该第四数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在另一种可能的示例中，通信模块还可向第二通信装置发送第五信息，该第五信息可指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
在通过条件组件实现第四方面所示通信装置时，该通信装置可包括收发器。示例性的，收发器可与处理器相互耦合，其中，收发器可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上收发器可用于执行上述方法中网络设备的发送和/或接收的动作，如用于执行网络设备向第一通信装置、第二通信装置以及第三通信装置发送信息、消息或信令的动作。此外，处理器可用于执行该方法中网络设备的处理动作，如用于控制收发器进行信息、消息或信令的接收和或发送，以及信息、消息或信令的处理和存储等操作。
具体的，收发器可用于向第一通信装置发送第一信息。该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系，该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载。收发器还可用于向该第二通信装置发送第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系，该第一RLC实体对应于该第二数据无线承载。
示例性的，该第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
以上第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，收发器还可向第三通信装置发送第三信息，该第三信息可指示第三数据无线承载与第四数据无线承载之间的对应关系。该第三数据无线承载为该网络设备与该第三通信装置之间的数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载。此外，收发器还可向该第二通信装置发送第四信息，该第四信息可指示第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系，该第二RLC实体对应于该第四数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在另一种可能的示例中，收发器还可向第二通信装置发送第五信息，该第五信息可指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
第五方面，本申请实施例提供一种通信装置。该通信装置可用于执行上述第二方面或 第二方面的任一可能的设计中由第一通信装置执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是第一通信装置或第一通信装置中的芯片。
在通过软件模块实现第五方面所示通信装置时，该通信装置可包括通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中第一通信装置的发送和/或接收的动作，如用于执行接收来自网络设备的信息、消息或信令的动作，或执行向第二通信装置发送信息、消息或信令的动作。此外，处理模块可用于执行该方法中第一通信装置的处理动作，如用于控制通信模块进行信息、消息或信令的接收和或发送，以及信息的处理和存储等操作。
具体的，通信模块可接收来自网络设备的第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系。该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载，该第二通信装置的SL接口的第一RLC实体对应于该第二数据无线承载，该第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
通信模块还可通过该第一数据无线承载，接收来自该网络设备的数据，以及通过该第二数据无线承载，向该第二通信装置发送该数据。
此外，通信模块还可通过该第二数据无线承载，接收来自该第二通信装置的数据，以及通过该第一数据无线承载，向该网络设备发送该数据。
以上第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
在通过硬件组件实现第五方面所示通信装置时，该通信装置可包括收发器。示例性的，收发器可与处理器相互耦合，其中，收发器可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上收发器可用于执行上述方法中第一通信装置的发送和/或接收的动作，如用于执行接收来自网络设备的信息、消息或信令的动作，或执行向第二通信装置发送信息、消息或信令的动作。此外，处理器可用于执行该方法中第一通信装置的处理动作，如用于控制通信模块进行信息、消息或信令的接收和或发送，以及信息的处理和存储等操作。
具体的，收发器可接收来自网络设备的第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系。该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载，该第二通信装置的SL接口的第一RLC实体对应于该第二数据无线承载，该第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无 线承载不包括该第一通信装置的PDCP实体。
收发器还可通过该第一数据无线承载，接收来自该网络设备的数据，以及通过该第二数据无线承载，向该第二通信装置发送该数据。
此外，收发器还可通过该第二数据无线承载，接收来自该第二通信装置的数据，以及通过该第一数据无线承载，向该网络设备发送该数据。
以上第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
第六方面，本申请实施例提供一种通信装置。该通信装置可用于执行上述第三方面或第三方面的任一可能的设计中由第二通信装置执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是第二通信装置或第二通信装置中的芯片。
在通过软件模块实现第六方面所示通信装置时，该通信装置可包括通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中第二通信装置的发送和/或接收的动作，如用于执行接收来自网络设备的信息、消息或信令的动作等。此外，处理模块可用于执行该方法中第二通信装置的处理动作，如用于控制通信模块进行信息、消息或信令的接收和或发送，以及信息的处理和存储等操作。
具体的，通信模块1101可接收来自该网络设备的第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系。该第一RLC实体对应于第二数据无线承载，该第二数据无线承载为第一通信装置与该第二通信装置之间的数据无线承载，该第一通信装置与该网络设备之间维护有第一数据无线承载，该第一数据无线承载对应于该第二数据无线承载。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，通信模块还可接收来自该网络设备的第四信息，该第四信息用于指示该第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系。该第二RLC实体对应于第四数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载，该第三通信装置与该网络设备之间维护有第三数据无线承载，该第四数据无线承载对应于该第三数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在一种可能的示例中，通信模块还可接收来自该网络设备的第五信息，该第五信息用于指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
在通过条件组件实现第六方面所示通信装置时，该通信装置可包括收发器。示例性的， 收发器可与处理器相互耦合，其中，收发器可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上收发器可用于执行上述方法中第二通信装置的发送和/或接收的动作，如用于执行接收来自网络设备的信息、消息或信令的动作。此外，处理器可用于执行该方法中第二通信装置的处理动作，如用于控制通信模块进行信息、消息或信令的接收和或发送，以及信息的处理和存储等操作。
具体的，收发器可接收来自该网络设备的第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系。该第一RLC实体对应于第二数据无线承载，该第二数据无线承载为第一通信装置与该第二通信装置之间的数据无线承载，该第一通信装置与该网络设备之间维护有第一数据无线承载，该第一数据无线承载对应于该第二数据无线承载。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，收发器还可接收来自该网络设备的第四信息，该第四信息用于指示该第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系。该第二RLC实体对应于第四数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载，该第三通信装置与该网络设备之间维护有第三数据无线承载，该第四数据无线承载对应于该第三数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在一种可能的示例中，收发器还可接收来自该网络设备的第五信息，该第五信息用于指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与所述第二通信装置之间的数据无线承载。
第七方面，本申请提供一种通信系统。该通信系统可以包括第四方面、第五方面以及第六方面所示的通信装置。
第八方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当所述计算机程序或指令被执行时，使得第一方面、第二方面或第三方面所述的方法被实现。
第九方面，本申请实施例提供一种计算机程序产品，所述计算机程序产品包括计算机程序或指令，当所述包括计算机程序或指令被执行时，使得第一方面、第二方面或第三方面所述的方法被实现。
第十方面，本申请提供一种芯片和/或包含芯片的芯片系统，该芯片可包括处理器。当所述芯片执行存储器中的计算机程序时，如第一方面、第二方面或第三方面所述的方法被执行。该芯片系统可以由上述芯片构成，也可以包含上述芯片和其他分立器件，如存储器(或存储模块)和/或收发器(或通信模块)。
以上第二至十方面的有益效果，可参照第一方面所示方法部分对于有益效果的说明。
附图说明
图1为本申请实施例提供的一种无线通信系统的架构示意图；
图2A为本申请实施例提供的一种L2中继通信控制面协议栈的示意图；
图2B为本申请实施例提供的一种L2中继通信用户面协议栈的示意图；
图3为本申请实施例提供的另一种无线通信系统的架构示意图；
图4为本申请实施例提供的一种通信方法的流程示意图；
图5为本申请实施例提供的一种应用于第一通信装置的配置表示意图；
图6为本申请实施例提供的一种应用于第二通信装置的配置表示意图；
图7为本申请实施例提供的另一种应用于第二通信装置的配置表示意图；
图8为本申请实施例提供的另一种应用于第二通信装置的配置表示意图；
图9为本申请实施例提供的一种通信装置的结构示意图；
图10为本申请实施例提供的一种通信装置的结构示意图；
图11为本申请实施例提供的一种通信装置的结构示意图；
图12为本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
如图1所示，本申请实施例提供的通信方法可应用于L2中继通信场景。如图1所示的L2中继通信场景可包括网络设备、第一通信装置以及第二通信装置，其中，网络设备与第二通信装置之间可通过第一通信装置的中继进行通信，因此即便第二通信装置处于网络设备的无线信号覆盖范围以外，第二通信装置与网络设备之间仍可通过第一通信装置进行通信。应理解，在实施中第一通信装置也可被称为中继终端设备(或中继终端)，第二通信装置也可被称为远端(remote)终端设备(或远端终端)。
图1中，第一通信装置可将第二通信装置中继至网络设备。示例性的，第一通信装置可以是终端设备或者是中继站、路边装置(road site unit，RSU)等具备中继功能的通信装置，或这些通信装置中的芯片。第一通信装置也可以是具有通信模块的通信芯片，或具有通信功能的车辆，或者车载设备(如车载通信装置，车载通信芯片)等。
第二通信装置可以是一个终端设备或终端设备中的芯片，该第二通信装置可具备无线收发功能。例如，其能够与一个或多个通信系统的一个或多个网络设备进行通信(如无线通信)，并接受网络设备提供的网络服务，这里的网络设备包括但不限于图1所示的网络设备。
应理解，本申请所涉及的终端设备例如用户设备(user equipment，UE)、终端(terminal)、接入终端、终端单元、终端站、移动台(mobile station，MS)、远方站、远程终端、移动终端(mobile terminal)、无线通信设备或终端代理等。
终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的终端装置、车联网(V2X)终端设备或者未来演进的PLMN网络中的终端装置等。
另外，终端设备可以部署在陆地上，包括室内或室外、手持或车载；终端设备也可以 部署在水面上(如轮船等)；终端设备还可以部署在空中(例如飞机、气球和卫星上等)。终端设备具体可以是手机(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、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、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)中的无线终端等。应理解，本申请中终端设备也可以是具有通信功能的车辆，或者车载设备(如车载通信装置，车载通信芯片)等。
示例性的，第一通信装置与第二通信装置之间可通过侧链路(sidelink，SL)接口(或称，接近服务(proximity-based services，ProSe)接口、直接通信(PC5)接口)进行通信。
网络设备为移动通信网络的一个接入站点，可用于提供移动通信网络的接入。其中，该移动通信网络可以是NR或未来更新的移动网络。网络设备可以是接入网设备(或称接入网站点)。其中，接入网设备是指有提供网络接入功能的设备，如无线接入网(radio access network，RAN)基站等等。网络设备具体可以是NR基站或未来演进的PLMN网络中的基站等。该网络设备还可包括中继站(中继设备)、传输点、发射点或者无线接入点等等。网络设备可以是可穿戴设备或车载设备。网络设备也可以是具有通信模块的通信芯片。
示例性的，第一通信装置可通过通用用户和网络的接口(universal user to network interface，Uu接口)接入网络设备。
基于图1所示架构，网络设备与第一通信装置之间以及第一通信装置与第二通信装置之间可分别通过无线承载进行通信。无线承载可包括数据无线承载(data radio bearer，DRB)和信令无线承载(signaling radio bear，SRB)，其中，数据无线承载可用于传输数据，信令无线承载可以用于传输控制面信令。
网络设备、第一通信装置以及第二通信装置之间进行通信所采用的控制面协议栈架构如图2A以及2B所示。可见，网络设备与第二通信装置可分别通过各自的Uu接口的RRC实体以及Uu接口的包数据汇聚协议(packet data convergence protocol，PDCP)实体进行通信，因此对于网络设备来说，第二通信装置是可见的，能够提高中继通信的可靠性。其中，PDCP实体可用于执行网际协议(internet protocol，IP)数据包的包头压缩等功能，以压缩传输的数据包的尺寸。示例性的，以网络设备向第二通信装置发送数据为例，该数据的包头由网络设备的PDCP实体进行压缩，并由第二通信装置通过对应的PDCP实体进行解压缩，从而第二通信装置可获取完整的IP数据包的包头以进行后续处理。
示例性的，图1所示的L2中继场景下的控制面协议栈以及用户面协议栈示意图分别如图2A以及2B所示。下面以用户面协议栈为例进行具体说明，控制面协议栈可参照理解。
如图2B所示，网络设备与第一通信装置的Uu接口的用户面无线承载分别包括无线链路控制(radio link control，RLC)实体(entity)(和/或配置)。可选的，Uu接口的用户面无线承载还可包括媒介访问控制(medium access control，MAC)实体(和/或配置)和/或物理(physical，PHY)层实体(和/或配置)以及可选的可包括适配层(adaptation layer，AL)实体(和/或配置)。第一通信装置与第二通信装置的SL接口(或称PC5接口、ProSe接口)的无线承载分别包括RLC实体(和/或配置)、MAC实体(和/或配置)以及PHY实体(和/或配置)以及可选的可包括适配层实体(和/或配置)。此外，网络设备与第二通信装置Uu接口的控制面无线承载还分别包括RRC实体(和/或配置)、NAS实体(和/或 配置)以及PDCP实体(和/或配置)。网络设备与第二通信装置Uu接口的控制面无线承载还分别包括PDCP实体(和/或配置)，可选的可包括服务数据适配协议(service data adaptation protocol，SDAP)实体。应理解，本申请中无线承载可包括各协议层(如RLC层、MAC层PHY层等)的实体和/或配置，为方便说明，后续以各协议层的实体为例进行介绍，但不应理解为本申请中无线承载仅包括各协议层的实体，因为无线承载还可包括协议层的配置，或者无线承载可仅包括协议层的配置。
如图2B所示，网络设备的Uu接口的RLC实体与第一通信装置的Uu接口的RLC实体之间维护至少一条Uu接口的逻辑信道(logic channel，LCH)。第一通信装置的SL接口的RLC实体与远端终端设备的SL接口的RLC实体之间维护至少一条SL接口的逻辑信道。
应理解，网络设备与远端终端设备之间还可通过多条路径(path)进行通信，以实现数据的重复传输(duplication)，或实现数据的分流传输(split)，从而提高通信可靠性和数据传输速率。示例性的，网络设备与远端终端设备之间可同时通过多个中继设备形成的多条路径进行通信；或者，网络设备与远端终端设备之间可通过至少一个中继设备进行通信，同时，网络设备与远端终端设备之间可直接进行通信，例如通过Uu接口进行通信。
如图3所示，网络设备与第二通信装置之间可通过第一通信装置、第三通信装置或网络设备与第二通信装置之间的Uu接口中的任意一条或多条路径进行通信。示例性的，图3所示的架构中，网络设备与第一通信装置之间的Uu接口的逻辑信道可表示为Uu_LCH_1，该Uu_LCH_1可由网络设备的Uu接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)与第一通信装置的Uu接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)共同维护。以SL通信为例，第一通信装置与第二通信装置之间的SL接口的逻辑信道可表示为SL_LCH_1，该SL_LCH_1可由第一通信装置的SL接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)与第二通信装置的SL接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)共同维护。
同理，网络设备的Uu接口的RLC实体与第三通信装置的Uu接口的RLC实体共同维护Uu_LCH_2逻辑信道；第三通信装置的SL接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)与第二通信装置的SL接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)共同维护SL_LCH_2逻辑信道。
此外，当网络设备与第二通信装置通过Uu接口进行通信时，网络设备的Uu接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)与第二通信装置的Uu接口的RLC实体(或RLC实体以及逻辑信道对应的MAC实体)共同维护Uu_LCH_3逻辑信道。
应理解，本申请不限制网络设备与第二通信装置之间还可通过图3未示出的其他路径进行通信。此外，本申请不限制网络设备与第二通信装置之间通过Uu接口进行通信的路径的数量，例如，网络设备可配置第二通信装置的多个无线承载，并通过每个无线承载与第二通信装置之间分别进行通信，此时每个无线承载可对应网络设备与第二通信装置之间的Uu接口的一条路径。
基于图1或图3所示架构，本申请实施例提供一种通信方法，用以提高L2中继通信中网络设备与第二通信装置之间的数据传输的效率。该通信方法可由网络设备、第一通信装置以及第二通信装置实施，其中，第一通信装置可包括网络设备以及第二通信装置之间的中继终端设备，或中继终端设备中的芯片。此外，该通信方法还可由网络设备、第一通信装置、第二通信装置以及第三通信装置执行。此时，第一通信装置以及第三通信装置可 分别作为网络设备以及第二通信装置之间的中继终端设备，或中继终端设备中的芯片。因此，基于本申请提供的通信方法，网络设备与第二通信装置之间可通过第一通信装置和/或第三通信装置进行通信。
下面结合图4，介绍本申请实施例提供的通信方法所包含的步骤。如图4所示，该方法可包括如下步骤：
S101：网络设备向第一通信装置发送第一信息。
其中，第一信息用于指示第一数据无线承载与第二数据无线承载之间的对应关系。第一数据无线承载为网络设备与第一通信装置之间的数据无线承载，例如，第一数据无线承载为网络设备与第一通信装置之间Uu接口的数据无线承载。第二数据无线承载为第一通信装置与第二通信装置之间的数据无线承载，例如，第二数据无线承载为第一通信装置与第二通信装置之间的SL接口的数据无线承载。
相应地，第一通信装置接收第一信息。
S102：网络设备向第二通信装置发送第二信息。
其中，第二信息用于指示第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第一RLC实体之间的对应关系，第一RLC实体对应于第二数据无线承载。
应理解，第一RLC实体对应于第二数据无线承载，可以是指第二通信装置的第一RLC实体的数据无线承载与第一通信装置的第二数据无线承载对应，或者说，第一RLC实体的数据无线承载(如标记为SL DRB ID1)与第一通信装置的第二数据无线承载维护同一逻辑信道。
相应地，第二通信装置接收第二信息。
采用以上方法，由网络设备向第一通信装置配置了第一数据无线承载与第二数据无线承载之间的对应关系，以便第一通信装置获知通过第一数据无线承载以及第二数据无线承载进行网络设备与第二通信装置之间的中继传输。此外，由网络设备向第二通信装置配置了第二数据无线承载对应的SL接口的RLC实体与Uu接口的PDCP实体之间的对应关系，第二通信装置可高效地实现PDCP实体的确定。以上通信方法提高了L2中继通信的数据传输效率。
应理解，本申请中，第一信息可在配置第一通信装置的数据无线承载过程中发送至第一通信装置。例如，第一信息可与第一数据无线承载的配置信息以及第二数据无线承载的配置信息一同发送。此外，第一信息也可在配置第一通信装置的数据无线承载过程以外的过程发送，本申请不予具体限定。
示例性的，网络设备可配置第一通信装置以及第二通信装置各自的数据无线承载。具体的，针对第一通信装置，网络设备可分别配置上述第一数据无线承载以及上述第二数据无线承载。针对第二通信装置，网络设备可配置包括第一RLC实体的数据无线承载，该数据无线承载为第二通信装置与第一通信装置之间的数据无线承载，该数据无线承载与第一通信装置的第二数据无线承载维护同一逻辑信道。
具体来说，根据如图2B所示的协议栈架构，本申请中网络设备针对第一通信装置配置的第一数据无线承载以及第二数据无线承载不包含PDCP实体。具体的，第一数据无线承载以及第二数据承载分别可包括网络设备与第一通信装置之间的SL接口的RLC实体、MAC实体(或配置)以及PHY实体等，但不包括PDCP实体。同理，本申请中网络设备针对第三通信装置配置的数据无线承载不包含PDCP实体。具体的，网络设备针对第三通 信装置配置的数据无线承载可包括网络设备与第一通信装置之间的SL接口的RLC实体、MAC实体以及PHY实体等，但不包括PDCP实体。
另外，根据如图2B所示的协议栈架构，本申请中网络设备针对第二通信装置配置的无线承载，可包括第二通信装置与第一通信装置之间SL接口的RLC实体(如第一RLC实体)、MAC实体以及PHY实体。此外，网络设备针对第二通信装置配置的无线承载还可包括第二通信装置与网络设备之间Uu接口的PDCP实体。应理解，网络设备针对第二通信装置配置的数据无线承载还可包括控制面的RRC实体以及NAS实体，以及可选的可包括用户面的SDAP实体。
在S101的实施中，第一数据无线承载与第二数据无线承载之间的对应关系，可表现为第一数据无线承载包括的第一通信装置的Uu接口的RLC实体，与第二数据无线承载包括的第一通信装置的SL接口的RLC实体之间的对应关系。
此外，第一数据无线承载与第二数据无线承载之间的对应关系，可表现为第一数据无线承载对应的Uu接口的逻辑信道与第二数据无线承载对应的SL接口的逻辑信道之间的对应关系。其中，第一数据无线承载对应的Uu接口的逻辑信道，由网络设备的Uu接口的RLC实体与第一数据无线承载包括的第一通信装置的Uu接口的RLC实体共同维护，如图3所示，第一数据无线承载对应的Uu接口的逻辑信道为Uu_LCH_1。第二数据无线承载对应的SL接口的逻辑信道，由第一通信装置的SL接口的RLC实体与第二数据无线承载包括的第一通信装置的SL接口的RLC实体共同维护，如图3所示，第二数据无线承载对应的SL接口的逻辑信道为SL_LCH_1。
其中，第二数据无线承载对应的SL接口的逻辑信道可由该逻辑信道的标识结合逻辑信道的源标识(source ID，SRC/SRC ID)(或源标识索引)、目的标识(destination ID，DST/DST ID)(或目的标识索引)或信道类型(cast-type)标识中的一个或多个标识进行表示。逻辑信道的源标识即通过逻辑信道发送数据的终端设备的标识，如SL L2 ID、SL L1 ID或其他UE标识。源标识索引可用于指示逻辑信道的源标识，例如可以是源标识对应的索引值。逻辑信道的目的标识即通过逻辑信道接收数据的终端设备的SL接口的标识，如SL L2 ID、SL L1 ID或其他UE标识。目的标识索引可用于指示逻辑信道的目的标识，例如可以是目的标识对应的索引值。逻辑信道的信道类型标识可用于指示该逻辑信道用于单播、组播或广播等。也就是说，本申请实施例中，SL_LCH_1和/或SL_LCH_2可用于通过单播、组播或广播进行通信。
如图3所示，在一种具体的示例中，可通过第一数据无线承载对应的Uu接口的逻辑信道(即如图3所示的逻辑信道Uu_LCH_1)与第二数据无线承载对应的SL接口的逻辑信道(即如图3所示的逻辑信道SL_LCH_1)之间的对应关系表示第一数据无线承载与第二数据无线承载之间的对应关系，其中，该SL接口的逻辑信道可通过逻辑信道的标识以及逻辑信道的源标识和/或目的标识进行指示。
该示例中第一通信装置可存储图5所示的配置表(或称路由表(routing table))，以保存该对应关系。根据图5，该配置表中可包括网络设备与第一通信装置之间的逻辑信道Uu_LCH_1的标识(如Uu_LCH_ID1)、逻辑信道SL_LCH_1的标识(如SL_LCH_ID1)以及逻辑信道SL_LCH_1的源标识或目的标识以及通信类型标识(如单播、组播、广播)中的任意一个或多个，以指示第一数据无线承载与第二数据无线承载之间的对应关系。第一信息可以是该配置表对应的配置信息，该第一信息中可携带逻辑信道Uu_LCH_1的标识、 逻辑信道SL_LCH_1的标识以及逻辑信道SL_LCH_1的源标识或目的标识中的任意一个或多个。应理解，图5所示的(SRC+DST+通信类型标识)是指可携带SRC、DST或者通信类型标识中的部分或全部标识，并不是必须同时携带SRC、DST以及通信类型标识。
同理，若网络设备通过多个中继终端设备与第二通信装置之间进行L2中继传输，其中，多个中继终端设备首尾相连，网络设备可针对每个中继终端设备，分别配置其接收数据的数据无线承载与其向下一终端设备发送该数据的数据无线承载之间的对应关系，以提高数据传输的可靠性和提高传输效率。
此外，S102所示的第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第一RLC实体之间的对应关系，可表现为第二通信装置的Uu接口的第一PDCP实体与第一RLC实体维护的逻辑信道之间的对应关系。
第二通信装置可根据第二信息存储第一PDCP实体与第一RLC实体和/或第一RLC实体维护的逻辑信道之间的对应关系。例如，第二通信装置可根据第二信息在第一PDCP实体中配置第一RLC实体的信息，实现Uu接口的第一PDCP实体与SL接口的第一RLC实体的绑定。具体的，仍以图3所示架构为例，对于网络设备通过第一通信装置与第二通信装置进行之间传输的方案，第二信息可用于配置如图6所示的配置表。可见，根据第二信息，第二通信装置可在第二通信装置的Uu接口的PDCP实体配置中进行SL小区组(cell group，CG)配置，例如该SL小区组配置可标记为SL CG ID1。第二通信装置还可在SL CG ID1对应的配置中存储第一RLC实体的信息，如在SL CG ID1对应的配置中存储第一RLC实体的数据无线承载的标识(如SL DRB ID1)、第一RLC实体维护的逻辑信道SL_LCH_1的标识、逻辑信道SL_LCH_1的源标识或目的标识中的至少一种信息，以表示第二通信装置的Uu接口的第一PDCP实体与SL接口的第一RLC实体之间对应。
应理解，以上第一信息可承载于网络设备向第一通信装置发送的RRC信令中，或者，可承载于网络设备向第一通信装置发送的、需要中继至第二通信装置的每个数据包中，以实现对应关系的灵活配置。此外，第二信息可承载于网络设备向第二通信装置发送的RRC信令中，或者，可承载于网络设备通过第一通信装置向第二通信装置发送的每个数据包中，以实现对应关系的灵活配置。
在一种可能的示例中，若网络设备分别通过图3所示的第一通信装置以及第三通信装置与第二通信装置进行通信，则网络设备还可向第三通信装置发送第三信息，该第三信息用于指示第三数据无线承载与第四数据无线承载之间的对应关系。其中，第三数据无线承载为网络设备与第三通信装置之间的数据无线承载，第四数据无线承载为第三通信装置与第二通信装置之间的数据无线承载。此外，网络设备还可向第二通信装置发送第四信息，用于指示第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第二RLC实体之间的对应关系，其中，第二RLC实体对应于第四数据无线承载。
采用该示例，第二通信装置的Uu接口的第一PDCP实体同时关联到第二通信装置的SL接口的第一RLC实体以及第二RLC实体，因此，可由Uu接口的同一PDCP实体处理多个SL接口的RLC实体的数据，为在L2中继通信中引入重复传输和分流传输提供了可能。
示例性的，网络设备还可向第三通信装置配置第三数据无线承载以及第四数据无线承载，其中，第三数据无线承载不包括第三通信装置的PDCP实体，第四数据无线承载不包括第三通信装置的PDCP实体。
应理解，以上第三数据无线承载与第四数据无线承载之间的对应关系的指示方式可参照本申请中第一数据无线承载与第二数据无线承载之间对于关系的指示方式。以图3所示架构为例，第三信息可携带Uu接口的逻辑信道Uu_LCH_2的标识、SL接口的逻辑信道SL_LCH_2的标识，以及逻辑信道SL_LCH_2的源标识或目的标识中的任意一个或多个，以指示第三数据无线承载与第四数据无线承载之间的对应关系。
此外，以上第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第二RLC实体之间的对应关系的指示方式，可参照本申请中对于第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第一RLC实体之间的对应关系的指示方式。以图3所示架构为例，第四信息可携带第一PDCP实体的标识、SL接口的逻辑信道SL_LCH_2的标识，以及逻辑信道SL_LCH_2的源标识或目的标识中的任意一个或多个，以指示第一PDCP实体与第二RLC实体之间的对应关系。
示例性的，若第二通信装置接收到来自网络设备的第二信息以及第四信息，则第二通信装置可根据第二信息以及第四信息配置如图7所示的配置表。其中，第二通信装置可在第二通信装置的Uu接口的PDCP实体配置中进行SL小区组的配置，其中，根据第二信息设置的小区组配置标记为SL CG ID1，SL CG ID1配置的内容可参见本申请中对于图6的介绍。此外，第二通信装置可根据第四信息，进行SL CG ID2的配置，如图7所示，SL CG ID2的配置中可存储第二RLC实体的数据无线承载的标识(如SL DRB ID2)、第二RLC实体维护的逻辑信道SL_LCH_2的标识(如SL_LCH_ID2)、逻辑信道SL_LCH_2的源标识或目的标识中的至少一种信息，以表示第二通信装置的Uu接口的第一PDCP实体与SL接口的第一RLC实体之间对应。根据图7可知，第二通信装置的Uu接口的PDCP实体关联到两个SL接口的RLC实体。
以上第三信息可承载于网络设备向第三通信装置发送的RRC信令中，或者，第三信息可承载于网络设备向第三通信装置发送的、需要中继至第二通信装置的每个数据包中，以实现对应关系的灵活配置。此外，第四信息可承载于网络设备向第二通信装置发送的RRC信令中，或者，第四信息可承载于网络设备通过第三通信装置向第二通信装置发送的每个数据包中，以实现对应关系的灵活配置。
应理解，本申请中，第三信息可在配置第三通信装置的数据无线承载过程中发送至第一通信装置。例如，第三信息可与第三数据无线承载的配置信息以及第四数据无线承载的配置信息一同发送。此外，第三信息也可在配置第三通信装置的数据无线承载过程以外的过程发送，本申请不予具体限定。
如图3所示，当网络设备与第二通信装置之间分别通过第一通信装置以及第三通信装置进行数据传输时，根据本申请实施例提供的通信方法，网络设备可通过第一信息向第一通信装置指示Uu_LCH_1与SL_LCH_1之间的对应关系，以及通过第二信息向第二通信装置指示Uu接口的第一PDCP实体与SL接口的第一RLC实体之间的对应关系，其中，第一RLC实体用于维护SL_LCH_1。网络设备还可通过第三信息向第三通信装置指示Uu_LCH_2与SL_LCH_2之间的对应关系，以及通过第四信息向第二通信装置指示Uu接口的第一PDCP实体与SL接口的第二RLC实体之间的对应关系，其中，第二RLC实体用于维护SL_LCH_2，例如对Uu_LCH_2接收的数据进行处理。
以下行数据传输过程为例，在进行重复传输时，网络设备首先将需要发送的数据包复制为两份，并通过Uu_LCH_1向第一通信装置发送其中的第一份数据包，由第一通信装置 根据Uu_LCH_1与SL_LCH_1的对应关系，将第一份数据包通过SL_LCH_1发送至第二通信装置，第二通信装置的第一RLC实体通过SL_LCH_1接收到第一份数据包。此外，网络设备还通过Uu_LCH_2向第三通信装置发送其中的第二份数据包，由第一通信装置通过SL_LCH_2将第二份数据包发送至第二通信装置，第二通信装置的第二RLC实体通过SL_LCH_2接收到第二份数据包。此后，第二通信装置可将通过SL_LCH_1接收到的第一份数据包以及通过SL_LCH_2接收到的第一份数据包交由第一PDCP实体处理，由第一PDCP实体根据第一份数据包以及第二份数据包进行数据包的重复检测和重排序，例如根据第一份数据包和第二份数据包获得一份完整的且经过排序的数据包，之后按需将数据包递交给第二通信装置的上层处理。由于重复传输时第二通信装置分别通过第一通信装置和第三通信装置接收相同的数据包，因此可提高数据包传输的可靠性。
在进行分流传输时，网络设备首先将需要发送的数据包拆分为两份，并通过Uu_LCH_1向第一通信装置发送其中的第一份数据包，由第一通信装置根据Uu_LCH_1与SL_LCH_1的对应关系，将第一份数据包通过SL_LCH_1发送至第二通信装置，第二通信装置的第一RLC实体通过SL_LCH_1接收到第一份数据包。此外，网络设备还通过Uu_LCH_2向第三通信装置发送其中的第二份数据包，由第一通信装置通过SL_LCH_2将第二份数据包发送至第二通信装置，第二通信装置的第二RLC实体通过SL_LCH_2接收到第二份数据包。此后，第二通信装置可将通过SL_LCH_1接收到的第一份数据包以及通过SL_LCH_2接收到的第二份数据包交由第一PDCP实体处理，由第一PDCP实体根据第一份数据包以及第二份数据包进行数据包的重复检测和重排序，例如将第一份数据包和第二份数据包合并得到一份完整的且经过排序的数据包，之后按需将数据包递交给第二通信装置的上层处理。由于分流传输时第二通信装置分别通过第一通信装置和第三通信装置接收不同的数据包，减少数据包的传输队列的长度，因此可提高数据包传输的效率，提高传输速率。
当进行上行传输时，可由终端将需要传输的数据进行复制(对应于重复传输)或分流(对应于分流传输)，并分别通过SL_LCH_1以及SL_LCH_2发送。第一通信装置将来自SL_LCH_1的数据通过Uu_LCH_1发送至网络设备，以及，第二通信装置将来自SL_LCH_2的数据通过Uu_LCH_2发送至网络设备，之后由网络设备对来自Uu_LCH_1以及Uu_LCH_2的数据进行合并。
应理解，以上重复传输和/或分流传输的过程中，网络设备可通过单播的方式分别通过Uu接口向第一通信装置以及第三通信装置发送数据包，其中，针对每个通信装置发送的数据包可通过每个通信装置的标识(如小区无线网络临时标识(cell-radio network temporary identifier，C-RNTI))进行加扰。网络设备还可通过组播的方式，进行数据包的发送。例如，在重复传输中，网络设备可将第一通信装置以及第三通信装置作为一组通信装置，并向该组通信装置发送数据包，其中，通过组播方式发送的数据包通过该组通信装置的组标识(如组无线网络临时标识(group-radio network temporary identifier，G-RNTI))加扰。在分流传输中，网络设备可将第一通信装置作为一组通信装置，以及将第三通信装置作为另一组通信装置，从而通过组播的方式分别向第一通信装置和第三通信装置发送不同的数据包。此外，在通过组播方式传输数据的方案中，网络设备传输数据所采用的Uu_LCH_1和/或Uu_LCH_2可以是组播逻辑信道。此外，网络设备还可通过广播的方式通过Uu接口发送数据。
在另一种可能的示例中，若网络设备分别通过图3所示的第一通信装置以及网络设备 与第二通信装置之间的Uu接口与第二通信装置进行通信，则网络设备还可向第二通信装置发送第五信息，该第五信息可用于指示第二通信装置的Uu接口的第一PDCP实体与第二通信装置的Uu接口的第三RLC实体之间的对应关系，其中，第三RLC实体对应于第二通信装置的第五数据无线承载，第五数据无线承载用于第二通信装置通过Uu接口与网络设备进行通信。
以上第二通信装置的Uu接口的第一PDCP实体与第二通信装置的Uu接口的第三RLC实体之间的对应关系的指示方式，可参照本申请中对于第二通信装置的Uu接口的第一PDCP实体与第二通信装置的SL接口的第一RLC实体之间的对应关系的指示方式。以图3所示架构为例，第五信息可携带第一PDCP实体的标识，以及携带Uu接口的逻辑信道Uu_LCH_3的标识和/或第三RLC实体对应的Uu接口的数据无线承载的标识(如Uu DRB ID1)，以指示第三数据无线承载与第四数据无线承载之间的对应关系。
示例性的，若第二通信装置接收到来自网络设备的第二信息以及第五信息，则第二通信装置可根据第二信息以及第五信息配置如图8所示的配置表。其中，第二通信装置可在第二通信装置的Uu接口的PDCP实体配置中进行SL小区组的配置，其中，根据第二信息设置的小区组配置标记为SL CG ID1，SL CG ID1中配置的内容可参见本申请中对于图6的介绍。此外，第二通信装置可根据第五信息，进行SL CG ID3的配置，如图8所示，SL CG ID3的配置中可存储第三RLC实体的数据无线承载的标识(如UuDRB ID3)，和/或存储第三RLC实体维护的逻辑信道Uu_LCH_3的标识(如Uu_LCH_ID3)，以表示第二通信装置的Uu接口的第一PDCP实体与Uu接口的第三RLC实体之间对应。根据图8可知，第二通信装置的Uu接口的PDCP实体分别关联到一个SL接口的RLC实体和一个Uu接口的RLC实体。
以上第五信息可承载于网络设备向第二通信装置发送的RRC信令中，或者，第五信息可承载于网络设备通过Uu接口向第二通信装置发送的每个数据包中，以实现对应关系的灵活配置。
该示例中，网络设备可通过第一通信装置以及通过Uu接口，分别向第二通信装置进行数据传输，因此可根据该架构实现数据的重复发送和/或分流发送。
如图3所示，当网络设备与第二通信装置之间分别通过第一通信装置的中继以及通过Uu接口进行数据传输时，根据本申请实施例提供的通信方法，网络设备可通过第一信息向第一通信装置指示Uu_LCH_1与SL_LCH_1之间的对应关系，以及通过第二信息向第二通信装置指示Uu接口的第一PDCP实体与SL接口的第一RLC实体之间的对应关系，其中，第一RLC实体用于维护SL_LCH_1。网络设备还可通过第五信息向第二通信装置指示Uu接口的第一PDCP实体与Uu接口的第三RLC实体之间的对应关系，其中，第三RLC实体用于维护Uu_LCH_3，例如对Uu_LCH_3接收的数据进行处理。
以下行数据传输过程为例，在进行重复传输时，网络设备首先将需要发送的数据包复制为两份，并通过Uu_LCH_1向第一通信装置发送其中的第一份数据包，由第一通信装置根据Uu_LCH_1与SL_LCH_1的对应关系，将第一份数据包通过SL_LCH_1发送至第二通信装置，第二通信装置的第一RLC实体通过SL_LCH_1接收到第一份数据包。此外，网络设备还通过Uu_LCH_3向第二通信装置发送其中的第二份数据包，由第二通信装置的第三RLC实体通过Uu_LCH_3接收到第二份数据包。此后，第二通信装置可将通过SL_LCH_1接收到的第一份数据包以及通过Uu_LCH_3接收到的第一份数据包交由第一 PDCP实体处理，由第一PDCP实体根据第一份数据包以及第二份数据包进行数据包的重复检测和重排序，例如根据第一份数据包和第二份数据包获得一份完整的且经过排序的数据包，之后按需将数据包递交给第二通信装置的上层处理。由于重复传输时第二通信装置分别通过第一通信装置的中继和Uu接口接收相同的数据包，降低了同一份数据包发生丢包的几率，因此可提高数据包传输的可靠性。
在进行分流传输时，网络设备首先将需要发送的数据包拆分为两份，并通过Uu_LCH_1向第一通信装置发送其中的第一份数据包，由第一通信装置根据Uu_LCH_1与SL_LCH_1的对应关系，将第一份数据包通过SL_LCH_1发送至第二通信装置，第二通信装置的第一RLC实体通过SL_LCH_1接收到第一份数据包。此外，网络设备还通过Uu_LCH_3向第二通信装置发送第二份数据包，由第二通信装置的第三RLC实体通过Uu_LCH_3接收到第二份数据包。此后，第二通信装置可将通过SL_LCH_1接收到的第一份数据包以及通过Uu_LCH_3接收到的第二份数据包交由第一PDCP实体处理，由第一PDCP实体根据第一份数据包以及第二份数据包进行数据包的重复检测和重排序，例如将第一份数据包和第二份数据包合并得到一份完整的且经过排序的数据包，之后按需将数据包递交给第二通信装置的上层处理。由于分流传输时第二通信装置分别通过第一通信装置的中继和Uu接口接收不同的数据包，减少数据包的传输队列的长度，因此可提高数据包传输的效率，提高传输速率。
当进行上行传输时，可由终端将需要传输的数据进行复制(对应于重复传输)或分流(对应于分流传输)，并分别通过SL_LCH_1以及Uu_LCH_3发送。第一通信装置将来自SL_LCH_1的数据通过Uu_LCH_1发送至网络设备，之后由网络设备对来自Uu_LCH_1以及Uu_LCH_3的数据进行合并。
在本申请实施例提供的另一种通信方法中，如图1或图3所示，若网络设备与第二通信装置之间可通过第一通信装置的中继进行通信，则第二通信装置可在向第一通信装置发送的数据中携带指示，用于第一通信装置确定该数据是否需要发送至网络设备。
示例性的，第二通信装置可针对发送至第一通信装置但不需要发送至网络设备的数据以及针对发送至第一通信装置且需要第一通信装置转发至网络设备的数据，分别填写不同的源标识，和/或，分别填写相同的源标识但填写不同的目的标识。例如表1所示，当来自第二通信装置的数据携带有源标识SRC1时，表示数据需要中继至网络设备，则第一通信装置可将该数据发送至网络设备；当来自第二通信装置的数据携带有源标识SRC2时，表示数据不需要中继至网络设备，则第一通信装置不需要将该数据发送至网络设备，此时第一通信装置可将该数据递交上层处理。
表1
索引 源标识 目的标识 是否需要发送至网络设备
#1 SRC1 - 是
#2 SRC2 - 否
#3 SRC3 DST1 是
#4 SRC3 DST2 否
应理解，在连接建立第一通信装置以及第二通信装置之间连接的过程中，第一通信装置以及第二通信装置可对表1所示的源标识和/或目的标识与是否需要将数据中继至网络设备的判断结果之间的对应关系进行协商，达成一致理解。具体的，第一通信装置以及第 二通信装置之间可建立多个(如两个)单播连接，其中在每个单播连接的建立过程中，第一通信装置以及第二通信装置可分别协商一组指示需要上传至网络设备的数据对应的源标识和/或目的标识。例如，在第一通信装置与第二通信装置建立第一单播连接的过程中，在第一通信装置与第二通信装置之间交互需要发送至网络设备的源标识和/或目的标识(如表1中#1和/或#3所示的源标识、目的标识)；在第二通信装置与第二通信装置对于不需要发送至网络设备的源标识和/或目的标识(如表1中#2和/或#4所示的源标识、目的标识)进行协商。
此外，在图3所述架构下，若第二通信装置通过第一通信装置(或第三通信装置)的中继以及Uu接口与网络设备连接，则第二通信装置在向网络设备请求上行传输授权(UL grant)时，可通过以下方式向网络设备发送缓存状态报告(buffer status report，BSR)。
方式一、第二通信装置通过其与网络设备之间的Uu接口，向网络设备上报上行BSR，该上行BSR用于请求上行传输授权。
方式一中，网络设备在通过Uu接口接收上行BSR后，可根据自身决策确定如何向第二通信装置发送上行传输授权。具体的，网络设备可通过其与第二通信装置之间的Uu接口，向第二通信装置发送上行传输授权。或者，网络设备可通过第一通信装置向第二通信装置发送SL传输授权，该SL传输授权可用于第二通信装置向第一通信装置发送数据；同时，网络设备可向第一通信装置发送上行传输授权，该上行传输授权用于第一通信装置将来自第二通信装置的数据上行发送至网络设备。
方式二、第二通信装置通过其与网络设备之间的Uu接口，向网络设备上报SL BSR，该SL BSR用于请求SL传输授权，该SL传输授权用于第二通信装置向第一通信装置发送数据，同时，第二通信装置可通过显示或隐式的方式指示该数据需要中继至网络设备。
方式二中，网络设备可通过第一通信装置向第二通信装置发送SL传输授权，该SL传输授权可用于第二通信装置向第一通信装置发送数据；同时，网络设备可向第一通信装置发送上行传输授权，该上行传输授权用于第一通信装置将来自第二通信装置的数据上行发送至网络设备。
其中，SL BSR中可携带指示信息，用于指示该SL BSR对应的数据需要中继至网络设备。或者，第二通信装置可在SLBSR中携带特定的信息，用于网络设备确定该SL BSR对应的数据需要中继至网络设备。例如，SL BSR中携带的DST L2 Id是表1中表示需要发送至网络设备的地址(如DST1)，从而网络设备根据该地址就知道该数据需要中继至网络设备。其中，网络设备可以根据第一通信装置上报的信息获知当SL BSR中携带特定的信息时，表示SL BSR对应的数据需要中继至网络设备；或者，网络设备可以从移动性管理实体(mobility management entity，MME)或接入和移动性管理功能(access and mobility management function，AMF)等核心网网元获取表1中表示需要发送至网络设备的地址(如DST1)，这些网元可通过RRC信令从第一通信装置和/或第二通信装置获该地址。
方式三，第二通信装置通过其与网络设备之间的Uu接口，向网络设备上报SL BSR，该SL BSR用于请求SL传输授权，该SL传输授权用于第二通信装置向第一通信装置发送数据，同时，第二通信装置可通过显示或隐式的方式指示该数据不需要中继至网络设备。
方式三中，网络设备可通过第一通信装置向第二通信装置发送SL传输授权，该SL传输授权仅用于第二通信装置向第一通信装置发送数据。
该示例中，当第二通信装置需要向第一通信装置传输数据，且不需要第一通信装置将 数据市下发至网络设备时，第二通信装置可向网络设备上报SL BSR，并指示该数据不需要中继至网络设备。例如，SL BSR中可携带指示信息，用于指示该SL BSR对应的数据不需要中继至网络设备。或者，SL BSR中可携带特定的信息，用于网络设备确定该SL BSR对应的数据不需要中继至网络设备。该特定的信息可包括特定的DST L2 Id，具体设置SL BSR的方式可参照方式二中指示数据需要中继至网络设备时SL BSR的设置方式。
本申请中，当网络设备通过Uu接口接收来自第二通信装置的BSR，或通过第一通信装置的中继接收来自第二通信装置的BSR后，网络设备可通过以下方法向第二通信装置发送传输授权。
方式一、网络设备可通过Uu接口或通过第二通信装置的中继，向第二通信装置发送上行传输授权，该上行传输授权可用于第二通信装置通过Uu接口向网络设备发送上行数据。
方式二、网络设备可通过Uu接口或通过第二通信装置的中继，向第二通信装置发送SL传输授权，该SL传输授权仅用于第二通信装置通过SL接口向第一通信装置发送数据。此外，由第一通信装置向网络设备请求上行授权，该上行授权用于第一通信装置将来自于第二通信装置的数据中继至网络设备。
方式三、网络设备可通过Uu接口向第二通信装置发送SL传输授权以及上行传输授权，其中，SL传输授权用于第二通信装置通过SL接口向第一通信装置发送数据，上行传输授权用于第一通信装置将该数据中继至网络设备。其中，该上行传输授权可限定仅用于将第一通信装置与第二通信装置之间通过SL接口传输的数据中继至网络设备。例如，网络设备通过下行控制信息(download control information，DCI)向第二通信装置发送SL传输授权以及上行传输授权。其中，若该上行传输授权限定仅用于将第一通信装置与第二通信装置之间通过SL接口传输的数据中继至网络设备，则第二通信装置可将该上行传输授权发送至第一通信装置。
方式四、网络设备可通过Uu接口向第二通信装置发送SL传输授权，以及通过Uu接口向第一通信装置发送上行授权。其中，该上行授权可限定仅用于将第一通信装置与第二通信装置之间通过SL接口传输的数据中继至网络设备。例如，该数据携带表1中#1或#3所示的标识。
方式五、网络设备可向第二通信装置发送SL传输授权。其中，该SL传输授权可沿用现有的SL传输授权方式。其中，该SL传输授权可限定仅限于第一通信装置与第二通信装置之间通过SL接口传输数据。
应理解，对于第二通信装置通过Uu接口发送至网络设备的BSR，或者对于通过第一通信装置的中继发送至网络设备，且携带有表示需要中继至网络设备的标识(例如表1中#1或#3所示的表示)的BSR，网络设备可采用如方式一至方式四中任意一种方式进行上行授权。针对通过第一通信装置的中继发送至网络设备，且携带有表示不需要中继至网络设备的标识(例如表1中#2或#4所示的标识)的BSR，网络设备可采用方式五进行SL授权。
上述本申请提供的实施例中，从网络设备、第一通信装置、第二通信装置以及第三通信装置所实现的功能的角度对本申请实施例提供的方法即方法流程进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，网络设备、第一通信装置、第二通信装置以及第三通信装置可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软 件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图9所示，本申请实施例提供的一种通信装置可以包括通信模块901以及处理模块902，以上通信模块901以及处理模块902之间相互耦合。该通信装置900可用于执行以上方法实施例中由网络设备执行的步骤。该通信模块901可用于支持通信装置900进行通信，通信模块901也可被称为通信单元、通信接口、收发模块或收发单元。通信模块901可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块902也可被称为处理单元，可用于支持该通信装置900执行上述方法实施例中网络设备的处理动作，包括但不限于：生成由通信模块901发送的信息、消息，和/或，对通信模块901接收的信号进行解调解码等等。
在执行上述方法实施例中由网络设备执行的步骤时，以上通信模块901可用于执行上述方法实施例中网络设备的发送和/或接收的动作。处理模块902可用于执行上述方法实施例中网络设备的处理动作，如用于控制通信模块901进行信息、消息或信令的接收和或发送，以及信息的存储等操作。
具体的，通信模块901可用于向第一通信装置发送第一信息。该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系，该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载。通信模块901还可用于向该第二通信装置发送第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系，该第一RLC实体对应于该第二数据无线承载。
示例性的，该第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
以上第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，通信模块901还可向第三通信装置发送第三信息，该第三信息可指示第三数据无线承载与第四数据无线承载之间的对应关系。该第三数据无线承载为该网络设备与该第三通信装置之间的数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载。此外，通信模块901还可向该第二通信装置发送第四信息，该第四信息可指示第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系，该第二RLC实体对应于该第四数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在另一种可能的示例中，通信模块901还可向第二通信装置发送第五信息，该第五信息可指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
在实现上述网络设备时，通信装置还可由硬件组件构成。便于理解和图示方便，图10中，以基站为例说明由硬件组件构成的通信装置的结构。通信装置1000可包括处理器1022、存储器1021以及收发器。
通信装置1000包括一个或多个远端射频单元(remote radio unit,RRU)1010和一个或 多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1020。该RRU1010可以称为通信模块，其可与图9中的通信模块901对应，用于执行以上由通信模块901执行的步骤。该RRU 1010还可以称为收发机、收发电路或者收发器等等，其可以包括至少一个天线1011和射频单元1012。该RRU 1010可用于射频信号的收发以及射频信号与基带信号的转换，例如发送本申请实施例提供的第一信息等。应理解，可将RRU 1010视为收发器，也可将射频单元1012视为收发器。可选地，RRU 1010可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。
该BBU 1020可用于进行基带处理，如信道编码，复用，调制，扩频等等，以及对基站进行控制等。该RRU 1010与BBU 1020可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。该BBU 1020为基站的控制中心，也可以称为处理模块、处理单元等，其可以与图9中的处理模块902对应，用于执行以上由处理模块902执行的步骤。BBU 1020还可用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如该BBU1020可以用于控制网络设备执行上述方法实施例中关于网络设备的操作流程，例如，生成第一信息等。
在一个示例中，该BBU 1020可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。该BBU 1020还包括存储器1021和处理器1022。该存储器1021用以存储必要的计算机程序或指令，以及数据。该处理器1022用于控制网络设备进行必要的动作，例如用于控制网络设备执行上述方法实施例中由CU和/或CU执行的操作流程。
示例性的，可由处理器1022执行以上由处理模块902执行的步骤。该存储器1021和处理器1022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
另外，网络设备不限于上述形态，也可以是其它形态：例如：包括BBU和自适应无线单元(adaptive radio unit，ARU)，或BBU和有源天线单元(active antenna unit，AAU)；也可以为客户终端设备(customer premises equipment，CPE)，还可以为其它形态，本申请不限定。
上述BBU 1020可以用于执行前面方法实施例中描述的由网络设备内部实现的处理动作。RRU 1210(或射频单元1012)可以用于执行前面方法实施例中描述的网络设备向第一通信装置等的发送动作。
具体的，RRU 1210可用于向第一通信装置发送第一信息。该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系，该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载。RRU 1210还可用于向该第二通信装置发送第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系，该第一RLC实体对应于该第二数据无线承载。
示例性的，该第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
以上第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不 包括该第一通信装置的PDCP实体。
在一种可能的示例中，RRU 1210还可向第三通信装置发送第三信息，该第三信息可指示第三数据无线承载与第四数据无线承载之间的对应关系。该第三数据无线承载为该网络设备与该第三通信装置之间的数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载。此外，RRU 1210还可向该第二通信装置发送第四信息，该第四信息可指示第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系，该第二RLC实体对应于该第四数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在另一种可能的示例中，RRU 1210还可向第二通信装置发送第五信息，该第五信息可指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
如图11所示，本申请实施例提供的一种通信装置可以包括通信模块1101以及处理模块1102，以上通信模块1101以及处理模块1102之间相互耦合。该通信装置1100可用于执行以上方法实施例中由第一通信装置和/或第二通信装置执行的步骤。该通信模块1101可用于支持通信装置100进行通信，通信模块1101也可被称为通信单元、通信接口、收发模块或收发单元。通信模块1101可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块1102也可被称为处理单元，可用于支持该通信装置1100执行上述方法实施例中第一通信装置和/或第二通信装置的处理动作，包括但不限于：生成由通信模块1101发送的信息、消息，和/或，对通信模块1101接收的信号进行解调解码等等。
在执行上述方法实施例中由第一通信装置和/或第二通信装置执行的步骤时，以上通信模块1101可用于执行上述方法实施例中第一通信装置和/或第二通信装置的发送和/或接收的动作，如用于接收来自网络设备的信息、消息或信令。处理模块1102可用于执行上述方法实施例中第一通信装置和/或第二通信装置的处理动作，如用于控制通信模块101进行信息、消息或信令的接收和或发送，以及执行信息的存储等操作。
具体的，在执行本申请实施例中由第一通信装置执行的动作时，通信模块1101可接收来自网络设备的第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系。该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载，该第二通信装置的SL接口的第一RLC实体对应于该第二数据无线承载，该第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
通信模块1101还可通过该第一数据无线承载，接收来自该网络设备的数据，以及通过该第二数据无线承载，向该第二通信装置发送该数据。
此外，通信模块1101还可通过该第二数据无线承载，接收来自该第二通信装置的数据，以及通过该第一数据无线承载，向该网络设备发送该数据。
以上第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
在执行本申请实施例中由第二通信装置执行的动作时，通信模块1101可接收来自该网络设备的第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系。该第一RLC实体对应于第二数据无线承载，该第二数据无线承载为第一通信装置与该第二通信装置之间的数据无线承载，该第一通信装置与该网络设备之间维护有第一数据无线承载，该第一数据无线承载对应于该第二数据无线承载。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，通信模块1101还可接收来自该网络设备的第四信息，该第四信息用于指示该第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系。该第二RLC实体对应于第四数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载，该第三通信装置与该网络设备之间维护有第三数据无线承载，该第四数据无线承载对应于该第三数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在一种可能的示例中，通信模块1101还可接收来自该网络设备的第五信息，该第五信息用于指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
在实现上述第一通信装置和/第二通信装置或时，通信装置还可由硬件组件构成。便于理解和图示方便，图12中，以手机为例说明由硬件组件构成第一通信装置和/第二通信装置或时通信装置1200的结构。如图12所示，通信装置1200可包括处理器1201、存储器1202以及收发器1203。
其中，处理器1201、收发器1203和存储器1202之间可以通过内部连接通路互相通信，传递控制和/或数据信号，该存储器1202用于存储计算机程序。该处理器1201用于从该存储器1202中调用并运行该计算机程序，以控制该收发器1203收发信号。
以上处理器1201可用于对通信协议以及通信数据进行处理，以及对通信装置1000进行控制，执行程序，处理程序的数据等。存储器1202可用于存储程序和数据，处理器1201可基于该程序执行本申请实施例中由接收端设备执行的方法。
上述收发器1203可以与图11中的通信模块1101对应，也可以称为收发单元。收发器1203可以包括接收器(或称接收机、接收电路)和发射器(或称发射机、发射电路)。其中，接收器用于接收信号，发射器用于发射信号。收发器1203具体可包括射频单元以及天线。其中，射频单元可用于基带信号与射频信号的转换以及对射频信号的处理。天线可用于收发电磁波形式的射频信号。另外，也可将射频单元视为收发器1203，则此时通信装置1200可包括处理器1201、存储器1202、收发器1203以及天线。
另外，该通信装置1200还可包括输入输出装置1204，如触摸屏、显示屏或者键盘等可用于接收用户输入的数据以及对用户输出数据的组件。需要说明的是，有些种类的通信装置可以不具有输入输出装置。
示例性的，上述处理器1201和存储器1202可以合设为处理装置，处理器1201用于执行存储器1202中存储的计算机程序或指令来实现上述功能。具体实现时，该存储器1202 也可以集成在处理器1201中，或者独立于处理器1201。
以上通信模块1101可具备收发器1203所示结构，即包括射频单元以及天线；或者，通信模块1101可包括以上射频单元。以上处理模块1102可包括处理器1201，或包括处理器1022以及存储器1021。
以上通信装置1200也可由芯片构成。例如，该芯片包含处理器1201。另外，该芯片还可包括存储器1202以及收发器1203，其中，存储器1202、收发器1203以及处理器1201三者中，任意两者之间可相互耦合。
基于图12所示结构，在执行本申请实施例中由第一通信装置执行的动作时，收发器1203可接收来自网络设备的第一信息，该第一信息可指示第一数据无线承载与第二数据无线承载之间的对应关系。该第一数据无线承载为该网络设备与该第一通信装置之间的数据无线承载，该第二数据无线承载为该第一通信装置与第二通信装置之间的数据无线承载，该第二通信装置的SL接口的第一RLC实体对应于该第二数据无线承载，该第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
收发器1203还可通过该第一数据无线承载，接收来自该网络设备的数据，以及通过该第二数据无线承载，向该第二通信装置发送该数据。
此外，收发器1203还可通过该第二数据无线承载，接收来自该第二通信装置的数据，以及通过该第一数据无线承载，向该网络设备发送该数据。
以上第一信息可包括该第二数据无线承载的源标识和/或该第二数据无线承载的目的标识。
在执行本申请实施例中由第二通信装置执行的动作时，收发器1203可接收来自网络设备的第二信息，该第二信息可指示该第二通信装置的Uu接口的第一PDCP实体与该第二通信装置的SL接口的第一RLC实体之间的对应关系。该第一RLC实体对应于第二数据无线承载，该第二数据无线承载为第一通信装置与该第二通信装置之间的数据无线承载，该第一通信装置与该网络设备之间维护有第一数据无线承载，该第一数据无线承载对应于该第二数据无线承载。
示例性的，该第一数据无线承载不包括该第一通信装置的PDCP实体，该第二数据无线承载不包括该第一通信装置的PDCP实体。
在一种可能的示例中，收发器1203还可接收来自该网络设备的第四信息，该第四信息用于指示该第一PDCP实体与该第二通信装置的SL接口的第二RLC实体之间的对应关系。该第二RLC实体对应于第四数据无线承载，该第四数据无线承载为该第三通信装置与该第二通信装置之间的数据无线承载，该第三通信装置与该网络设备之间维护有第三数据无线承载，该第四数据无线承载对应于该第三数据无线承载。
该示例中，该第三数据无线承载不包括该第三通信装置的PDCP实体，该第四数据无线承载不包括该第三通信装置的PDCP实体。
在一种可能的示例中，收发器1203还可接收来自该网络设备的第五信息，该第五信息用于指示该第一PDCP实体与该第二通信装置的Uu接口的第三RLC实体之间的对应关系。该第三RLC实体对应于第五数据无线承载，该第五数据无线承载为该网络设备与该第二通信装置之间的数据无线承载。
基于与上述方法实施例相同构思，本申请实施例中还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时，使该计算机执行上述方法实施例、方法实施例的任意一种可能的实现方式中由网络设备、第一通信装置和/或第二通信装置执行的操作。
基于与上述方法实施例相同构思，本申请还提供一种计算机程序产品，该计算机程序产品可包括计算机程序或指令，当其在被计算机调用执行时，可以使得计算机实现上述方法实施例、方法实施例的任意一种可能的实现方式中由网络设备、第一通信装置和/或第二通信装置执行的操作。
基于与上述方法实施例相同构思，本申请还提供一种芯片或芯片系统，该芯片可包括处理器。该芯片还可包括存储器(或存储模块)和/或收发器(或通信模块)，或者，该芯片与存储器(或存储模块)和/或收发器(或通信模块)耦合，其中，收发器(或通信模块)可用于支持该芯片进行有线和/或无线通信，存储器(或存储模块)可用于存储程序，该处理器调用该程序可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由网络设备、第一通信装置和/或第二通信装置执行的操作。该芯片系统可包括以上芯片，也可以包含上述芯片和其他分立器件，如存储器(或存储模块)和/或收发器(或通信模块)。
基于与上述方法实施例相同构思，本申请还提供一种通信系统，该通信系统可包括网络设备、第一通信装置和/或第二通信装置。该通信系统可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由网络设备、第一通信装置和/或第二通信装置执行的操作。示例性的，该通信系统可具有如图1或图3所示结构。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
本申请实施例是参照实施例所涉及的方法、装置、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序或指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序或指令到通用计算机、专用计机、嵌入式处理机或其他可编程数据处理设备的处理器以产 生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的计算机程序或指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序或指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的计算机程序或指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序或指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的计算机程序或指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。

Claims (39)

  1. 一种通信方法，其特征在于，包括：
    网络设备向第一通信装置发送第一信息，所述第一信息用于指示第一数据无线承载与第二数据无线承载之间的对应关系，所述第一数据无线承载为所述网络设备与所述第一通信装置之间的数据无线承载，所述第二数据无线承载为所述第一通信装置与第二通信装置之间的数据无线承载；
    所述网络设备向所述第二通信装置发送第二信息，所述第二信息用于指示所述第二通信装置的Uu接口的第一PDCP实体与所述第二通信装置的SL接口的第一RLC实体之间的对应关系，所述第一RLC实体对应于所述第二数据无线承载。
  2. 如权利要求1所述的方法，其特征在于，所述第一数据无线承载不包括所述第一通信装置的PDCP实体，所述第二数据无线承载不包括所述第一通信装置的PDCP实体。
  3. 如权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述网络设备向第三通信装置发送第三信息，所述第三信息用于指示第三数据无线承载与第四数据无线承载之间的对应关系，所述第三数据无线承载为所述网络设备与所述第三通信装置之间的数据无线承载，所述第四数据无线承载为所述第三通信装置与所述第二通信装置之间的数据无线承载；
    所述网络设备向所述第二通信装置发送第四信息，所述第四信息用于指示第一PDCP实体与所述第二通信装置的SL接口的第二RLC实体之间的对应关系，所述第二RLC实体对应于所述第四数据无线承载。
  4. 如权利要求3所述的方法，其特征在于，所述第三数据无线承载不包括所述第三通信装置的PDCP实体，所述第四数据无线承载不包括所述第三通信装置的PDCP实体。
  5. 如权利要求1-4中任一所述的方法，其特征在于，所述方法还包括：
    所述网络设备向第二通信装置发送第五信息，所述第五信息用于指示所述第一PDCP实体与所述第二通信装置的Uu接口的第三RLC实体之间的对应关系，所述第三RLC实体对应于第五数据无线承载，所述第五数据无线承载为所述网络设备与所述第二通信装置之间的数据无线承载。
  6. 如权利要求1-5中任一所述的方法，其特征在于，所述第一信息包括所述第二数据无线承载的源标识和/或所述第二数据无线承载的目的标识。
  7. 一种通信方法，其特征在于，包括：
    第一通信装置接收来自网络设备的第一信息，所述第一信息用于指示第一数据无线承载与第二数据无线承载之间的对应关系，所述第一数据无线承载为所述网络设备与所述第一通信装置之间的数据无线承载，所述第二数据无线承载为所述第一通信装置与第二通信装置之间的数据无线承载，所述第二通信装置的SL接口的第一RLC实体对应于所述第二数据无线承载，所述第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
  8. 如权利要求7所述的方法，其特征在于，所述第一数据无线承载不包括所述第一通信装置的PDCP实体，所述第二数据无线承载不包括所述第一通信装置的PDCP实体。
  9. 如权利要求7或8所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置通过所述第一数据无线承载，接收来自所述网络设备的数据；
    所述第一通信装置通过所述第二数据无线承载，向所述第二通信装置发送所述数据。
  10. 如权利要求7-9中任一所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置通过所述第二数据无线承载，接收来自所述第二通信装置的数据；
    所述第一通信装置通过所述第一数据无线承载，向所述网络设备发送所述数据。
  11. 如权利要求7-10中任一所述的方法，其特征在于，所述第一信息包括所述第二数据无线承载的源标识和/或所述第二数据无线承载的目的标识。
  12. 一种通信方法，其特征在于，包括：
    第二通信装置接收来自所述网络设备的第二信息，所述第二信息用于指示所述第二通信装置的Uu接口的第一PDCP实体与所述第二通信装置的SL接口的第一RLC实体之间的对应关系，所述第一RLC实体对应于第二数据无线承载，所述第二数据无线承载为第一通信装置与所述第二通信装置之间的数据无线承载，所述第一通信装置与所述网络设备之间维护有第一数据无线承载，所述第一数据无线承载对应于所述第二数据无线承载。
  13. 如权利要求12所述的方法，其特征在于，所述第一数据无线承载不包括所述第一通信装置的PDCP实体，所述第二数据无线承载不包括所述第一通信装置的PDCP实体。
  14. 如权利要求12或13所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置接收来自所述网络设备的第四信息，所述第四信息用于指示所述第一PDCP实体与所述第二通信装置的SL接口的第二RLC实体之间的对应关系，所述第二RLC实体对应于第四数据无线承载，所述第四数据无线承载为所述第三通信装置与所述第二通信装置之间的数据无线承载，所述第三通信装置与所述网络设备之间维护有第三数据无线承载，所述第四数据无线承载对应于所述第三数据无线承载。
  15. 如权利要求14所述的方法，其特征在于，所述第三数据无线承载不包括所述第三通信装置的PDCP实体，所述第四数据无线承载不包括所述第三通信装置的PDCP实体。
  16. 如权利要求12-15中任一所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置接收来自所述网络设备的第五信息，所述第五信息用于指示所述第一PDCP实体与所述第二通信装置的Uu接口的第三RLC实体之间的对应关系，所述第三RLC实体对应于第五数据无线承载，所述第五数据无线承载为所述网络设备与所述第二通信装置之间的数据无线承载。
  17. 一种通信装置，其特征在于，包括通信模块：
    所述通信模块，用于向第一通信装置发送第一信息，所述第一信息用于指示第一数据无线承载与第二数据无线承载之间的对应关系，所述第一数据无线承载为所述通信装置与所述第一通信装置之间的数据无线承载，所述第二数据无线承载为所述第一通信装置与第二通信装置之间的数据无线承载；
    所述通信模块，还用于向所述第二通信装置发送第二信息，所述第二信息用于指示所述第二通信装置的Uu接口的第一PDCP实体与所述第二通信装置的SL接口的第一RLC实体之间的对应关系，所述第一RLC实体对应于所述第二数据无线承载。
  18. 如权利要求17所述的通信装置，其特征在于，所述第一数据无线承载不包括所述第一通信装置的PDCP实体，所述第二数据无线承载不包括所述第一通信装置的PDCP实体。
  19. 如权利要求17或18所述的通信装置，其特征在于，所述通信模块还用于：
    向第三通信装置发送第三信息，所述第三信息用于指示第三数据无线承载与第四数据 无线承载之间的对应关系，所述第三数据无线承载为所述通信装置与所述第三通信装置之间的数据无线承载，所述第四数据无线承载为所述第三通信装置与所述第二通信装置之间的数据无线承载；
    向所述第二通信装置发送第四信息，所述第四信息用于指示第一PDCP实体与所述第二通信装置的SL接口的第二RLC实体之间的对应关系，所述第二RLC实体对应于所述第四数据无线承载。
  20. 如权利要求19所述的通信装置，其特征在于，所述第三数据无线承载不包括所述第三通信装置的PDCP实体，所述第四数据无线承载不包括所述第三通信装置的PDCP实体。
  21. 如权利要求17-20中任一所述的通信装置，其特征在于，所述通信模块还用于：
    向第二通信装置发送第五信息，所述第五信息用于指示所述第一PDCP实体与所述第二通信装置的Uu接口的第三RLC实体之间的对应关系，所述第三RLC实体对应于第五数据无线承载，所述第五数据无线承载为所述通信装置与所述第二通信装置之间的数据无线承载。
  22. 如权利要求17-21中任一所述的通信装置，其特征在于，所述第一信息包括所述第二数据无线承载的源标识和/或所述第二数据无线承载的目的标识。
  23. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自网络设备的第一信息，所述第一信息用于指示第一数据无线承载与第二数据无线承载之间的对应关系，所述第一数据无线承载为所述网络设备与所述通信装置之间的数据无线承载，所述第二数据无线承载为所述通信装置与第二通信装置之间的数据无线承载，所述第二通信装置的SL接口的第一RLC实体对应于所述第二数据无线承载，所述第二通信装置的Uu接口的第一PDCP实体与SL接口第一RLC实体之间对应。
  24. 如权利要求23所述的通信装置，其特征在于，所述第一数据无线承载不包括所述通信装置的PDCP实体，所述第二数据无线承载不包括所述通信装置的PDCP实体。
  25. 如权利要求23或24所述的通信装置，其特征在于，所述通信模块还用于：
    通过所述第一数据无线承载，接收来自所述网络设备的数据；
    通过所述第二数据无线承载，向所述第二通信装置发送所述数据。
  26. 如权利要求23-25中任一所述的通信装置，其特征在于，所述通信模块还用于：
    通过所述第二数据无线承载，接收来自所述第二通信装置的数据；
    通过所述第一数据无线承载，向所述网络设备发送所述数据。
  27. 如权利要求23-26中任一所述的通信装置，其特征在于，所述第一信息包括所述第二数据无线承载的源标识和/或所述第二数据无线承载的目的标识。
  28. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自所述网络设备的第二信息，所述第二信息用于指示所述通信装置的Uu接口的第一PDCP实体与所述通信装置的SL接口的第一RLC实体之间的对应关系，所述第一RLC实体对应于第二数据无线承载，所述第二数据无线承载为第一通信装置与所述通信装置之间的数据无线承载，所述第一通信装置与所述网络设备之间维护有第一数据无线承载，所述第一数据无线承载对应于所述第二数据无线承载。
  29. 如权利要求28所述的通信装置，其特征在于，所述第一数据无线承载不包括所 述第一通信装置的PDCP实体，所述第二数据无线承载不包括所述第一通信装置的PDCP实体。
  30. 如权利要求28或29所述的通信装置，其特征在于，所述通信模块还用于：
    接收来自所述网络设备的第四信息，所述第四信息用于指示所述第一PDCP实体与所述通信装置的SL接口的第二RLC实体之间的对应关系，所述第二RLC实体对应于第四数据无线承载，所述第四数据无线承载为所述第三通信装置与所述通信装置之间的数据无线承载，所述第三通信装置与所述网络设备之间维护有第三数据无线承载，所述第四数据无线承载对应于所述第三数据无线承载。
  31. 如权利要求30所述的通信装置，其特征在于，所述第三数据无线承载不包括所述第三通信装置的PDCP实体，所述第四数据无线承载不包括所述第三通信装置的PDCP实体。
  32. 如权利要求28-31中任一所述的通信装置，其特征在于，所述通信模块还用于：
    接收来自所述网络设备的第五信息，所述第五信息用于指示所述第一PDCP实体与所述通信装置的Uu接口的第三RLC实体之间的对应关系，所述第三RLC实体对应于第五数据无线承载，所述第五数据无线承载为所述网络设备与所述通信装置之间的数据无线承载。
  33. 一种通信装置，其特征在于，包括处理器以及收发器；
    所述收发器用于所述通信装置进行通信；
    所述处理器用于执行存储器中存储的指令，执行如权利要求1-6中任一所述的方法。
  34. 一种通信装置，其特征在于，包括处理器以及收发器；
    所述收发器用于所述通信装置进行通信；
    所述处理器用于执行存储器中存储的指令，执行如权利要求7-11中任一所述的方法。
  35. 一种通信装置，其特征在于，包括处理器以及收发器；
    所述收发器用于所述通信装置进行通信；
    所述处理器用于执行存储器中存储的指令，执行如权利要求12-16中任一所述的方法。
  36. 一种通信系统，其特征在于，包括如权利要求17-22、33中任一所述的通信装置，以及包括如权利要求23-27、34中任一所述的通信装置，如权利要求28-32、35中任一所述的通信装置。
  37. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储指令，当所述指令被执行时，使得如权利要求1-6、7-11、12-16中任一所述的方法被实现。
  38. 一种计算机程序产品，其特征在于，包括指令，当所述指令被执行时，使得如权利要求1-6、7-11、12-16中任一所述的方法被实现。
  39. 一种芯片，其特征在于，包括处理器，所述处理器用于执行存储器中存储的指令，执行如权利要求1-6、7-11、12-16中任一所述的方法。
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