WO2020147591A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置 Download PDF

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Publication number
WO2020147591A1
WO2020147591A1 PCT/CN2020/070088 CN2020070088W WO2020147591A1 WO 2020147591 A1 WO2020147591 A1 WO 2020147591A1 CN 2020070088 W CN2020070088 W CN 2020070088W WO 2020147591 A1 WO2020147591 A1 WO 2020147591A1
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WO
WIPO (PCT)
Prior art keywords
communication device
information
unicast
configuration information
service
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PCT/CN2020/070088
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English (en)
French (fr)
Inventor
范强
彭文杰
魏冬冬
王君
戴明增
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112021013953-2A priority Critical patent/BR112021013953A2/pt
Priority to EP20741303.0A priority patent/EP3905823A4/en
Publication of WO2020147591A1 publication Critical patent/WO2020147591A1/zh
Priority to US17/376,833 priority patent/US20210345356A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • 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 technology, and more specifically, to a communication method and communication device.
  • unicast service data can be transmitted between two terminal devices in a unicast communication manner.
  • the traditional solution is generally to configure the side-link radio bearer during the establishment of a unicast connection.
  • the configuration of the side-link radio bearer is usually predefined, and then unicast is performed based on the side-link radio bearer. Communication.
  • the disadvantage of this communication method is its low flexibility.
  • This application provides a communication method and communication device to improve the flexibility of unicast communication.
  • a communication method includes: a first communication device obtains first configuration information; and the first communication device sends the first configuration information to a second communication device.
  • the above-mentioned first configuration information includes configuration information of the first side uplink radio bearer, the first side uplink radio bearer is used to carry the first unicast service between the first communication device and the second communication device,
  • the side link is a wireless link between the first communication device and the second communication device.
  • the above-mentioned first side link bearer may include a sidelink data radio bearer (SL-DRB), a sidelink signaling radio bearer (SL-SRB), and so on.
  • SL-DRB sidelink data radio bearer
  • SRB sidelink signaling radio bearer
  • the foregoing first side uplink bearer may include only SL-DRB, or only SL-SRB, or both SL-DRB and SL-SRB.
  • the configuration information of the SL-DRB includes one or more of the following information: the mapping relationship information from the quality of service QoS flow to the SL-DRB, the packet data convergence protocol PDCP configuration information, and the radio link control layer RLC configuration information , Logical channel LCH configuration information.
  • the foregoing first side link radio bearer is a radio bearer that can meet service requirements corresponding to the QoS information of the first unicast service.
  • the first configuration information can be exchanged between the first communication device and the second communication device.
  • the first communication device and the second communication device are enabled to execute the first unicast service according to the first configuration information, thereby meeting the service requirements of the first unicast service.
  • acquiring the first configuration information by the first communication device includes: the first communication device determines the first configuration information according to QoS information of the first unicast service.
  • a unicast connection already exists between the first communication device and the second communication device, and a unicast connection already exists between the first communication device and the second communication device
  • the first communication device sends the first configuration information to the second communication device.
  • the service requirement corresponding to the QoS information of the first unicast service may also be referred to as the service requirement of the first unicast service.
  • the side link radio bearer of the existing unicast connection between the first communication device and the second communication device does not meet the service requirements corresponding to the QoS information of the first unicast service, which may refer to the use of the existing unicast service.
  • the connected side link radio bearer transmits the service data of the first unicast service, it cannot meet the service requirements corresponding to the QoS information of the first unicast service.
  • the above method further includes: the first communication device according to the first The configuration information updates the configuration parameters of the side link radio bearer of the existing unicast connection.
  • the first configuration information is exchanged between the communication devices to make the first A communication device and a second communication device can update the configuration of the side link radio bearer of the existing unicast connection according to the first configuration information, so that when the first unicast service is subsequently executed, the first unicast service can be satisfied.
  • the service requirements corresponding to the QoS information of the unicast service are exchanged between the communication devices to make the first A communication device and a second communication device can update the configuration of the side link radio bearer of the existing unicast connection according to the first configuration information, so that when the first unicast service is subsequently executed, the first unicast service can be satisfied.
  • the above method may further include: the first communication device determines whether there is a unicast connection between the first communication device and the second communication device; there is a unicast connection between the first communication device and the second communication device In the case, the first communication device determines whether the side link radio bearer of the existing unicast connection meets the service requirement corresponding to the QoS information of the first unicast service.
  • the QoS information of the first unicast service when the QoS information of the first unicast service is included in the existing QoS flow information, it is determined that the side link radio bearer of the existing unicast connection can meet the QoS information corresponding to the first unicast service
  • the QoS information of the first unicast service is not included in the existing QoS flow information, it is determined that the side link radio bearer of the existing unicast connection cannot meet the QoS of the first unicast service
  • the above method may further include: the non-access layer of the first communication device indicates the first information to the access layer of the first communication device;
  • the access layer determines according to the first information that the side link radio bearer of the existing unicast connection does not meet the service requirements corresponding to the QoS information of the first unicast service.
  • the foregoing first information includes QoS information of the first unicast service, or the foregoing first information includes QoS information of the first unicast service and identification information of the second communication device.
  • the access layer of the first communication device can obtain the first information related to the first unicast service Then, it can be determined according to the first information whether the side link radio bearer of the existing unicast connection can meet the service requirement corresponding to the QoS information of the first unicast service.
  • the non-access layer of the first communication device indicates the first information to the access layer of the first communication device
  • the first information may be indicated in an explicit manner or may be indicated in an implicit manner.
  • the first communication device acquiring the first configuration information specifically includes: The non-access layer of the communication device obtains the first configuration information from the access layer of the first communication device; the first communication device sends the first configuration information to the second communication device, specifically including: the non-access layer of the first communication device Send a first request message to the non-access layer of the second communication device to establish a first unicast connection between the first communication device and the second communication device.
  • the foregoing first request message includes first configuration information, and the first unicast connection is used to transmit service data of the first unicast service between the first communication device and the second communication device.
  • the non-access layer of the first communication device can obtain the first configuration information through interaction with the access layer of the first communication device, and then generate the first configuration information based on the first configuration information.
  • a request message, and the first configuration information is transmitted to the second communication device during the process of sending the first request message to the second communication device.
  • the above method further Including: the non-access layer of the first communication device indicates any one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and information about the second communication device Identification information, or QoS information of the first unicast service.
  • the non-access layer of the first communication device Before the non-access layer of the first communication device obtains the first configuration information from the access layer of the first communication device (optional), by indicating the above information to the access layer of the first communication device, it is convenient for the first communication device to The non-access layer obtains the first configuration information from the access layer of the first communication device. For example, after the non-access layer of the first communication device indicates the above information to the access layer of the first communication device, the access layer of the first communication device may feed back or send the above-mentioned first communication device to the non-access layer of the first communication device.
  • a configuration information (indicating information through the non-access layer of the first communication device to the access layer of the first communication device can trigger the access layer of the first communication device to feed back the above-mentioned first Configuration information).
  • the above method further includes: The non-access layer of the second communication device sends a second request message to establish a second unicast connection between the first communication device and the second communication device, wherein the second unicast connection is used for the communication between the first communication device and the second communication device.
  • the second communication device transmits the service data of the first unicast service; the first communication device sends the first configuration information to the second communication device, including: the access layer of the first communication device to the second communication device The layer sends the first configuration information.
  • the access layer of a communication device sends the first configuration information to the access layer of the second communication device.
  • the above method further includes :
  • the non-access layer of the first communication device indicates any one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and identification of the second communication device Information, QoS information of the first unicast service.
  • the non-access layer of the first communication device can trigger the access layer of the first communication device to send the first communication device to the access layer of the second communication device by indicating the above information to the access layer of the first communication device.
  • One configuration information One configuration information.
  • the above method further includes: the first communication device sends a third request message to the wireless access network device; the first communication device receives the wireless access network device sent The first configuration information.
  • the third request message includes the QoS information of the first unicast service, or the third request message includes the QoS information of the first unicast service and the unicast connection identifier of the unicast connection corresponding to the first unicast service. .
  • the foregoing manner of obtaining the first configuration information through interaction with the access network device facilitates control of the configuration information according to the access network device.
  • the identification information of the first communication device is updated.
  • the above method further includes: the first communication device sends identification update information to the second communication device, and the identification update information is used To indicate the updated identification information of the second communication device.
  • the embodiment of the present application sends the identification update information to the second communication device, so that when the first communication device and the second communication device perform unicast communication, the corresponding unicast communication service data can be normally transmitted between the first communication device and the second communication device. Transmission between communication devices.
  • the non-access layer of the first communication device is the PC5 signaling layer or the car networking V2X layer of the first communication device, and the access layer of the first communication device It is the radio resource control RRC layer of the first communication device or the radio resource control SL RRC layer of the side link.
  • a communication method includes: a second communication device receives first configuration information sent by a first communication device; and the second communication device determines, according to the first configuration information, the first side uplink radio bearer Configuration information.
  • the above-mentioned first configuration information includes configuration information of the first side uplink radio bearer, the first side uplink radio bearer is used to carry the first unicast service between the first communication device and the second communication device,
  • the side link is a wireless link between the first communication device and the second communication device.
  • the configuration information of the side link radio bearer carrying unicast services is exchanged between the communication devices, so that the communication devices can better perform unicast according to the configuration information of the side link radio bearer. Transmission of business data.
  • the second communication device receives the first configuration information sent by the first communication device, Specifically:
  • the non-access stratum of the second communication device receives the first request message sent by the non-access stratum of the first communication device to establish a first unicast connection between the first communication device and the second communication device.
  • the foregoing first request message includes first configuration information, and the first unicast connection is used to transmit service data of the first unicast service between the first communication device and the second communication device.
  • the above method further includes: the non-access layer of the second communication device receives the first communication device.
  • the information specifically includes: the access layer of the second communication device receives the first configuration information sent by the access layer of the first communication device.
  • the aforementioned second unicast connection is used to transmit service data of the first unicast service between the first communication device and the second communication device.
  • the above method further includes: the second communication device receives the identity update information sent by the first communication device, the identity update information is used to indicate the updated identity of the first communication device information.
  • a communication method includes: a first communication device obtains identification update information, where the identification update information includes: updated identification information of the first communication device;
  • the side link sends the identification update information to the second communication device, where the side link is a wireless link between the first communication device and the second communication device.
  • the corresponding unicast communication service data can be normally transmitted between the first communication device and the second communication device. Transmission between the second communication device.
  • the identification update information further includes: identification information before the update of the first communication device.
  • the communication device transmits normally.
  • the identification information of the first communication device includes the application layer identification of the first communication device and/or the source layer 2 identification of the first communication device .
  • a communication device may be a terminal device, or a device in the terminal device, such as a chip, or a device that can be matched and used with the terminal device.
  • the communication device may include a module corresponding to the method/operation/step/action described in the first, second, or third aspect.
  • the module may be a hardware circuit, or software, or It can be realized by hardware circuit combined with software.
  • a communication device may be a terminal device, or a device in the terminal device, such as a chip, or a device that can be matched with the terminal device.
  • the device includes: a processor and a transceiver , Can also include memory.
  • the processor is used to call the program code stored in the memory to perform part or all of the operations in any one of the first aspect, the second aspect, or the third aspect.
  • the aforementioned memory is a non-volatile memory.
  • the foregoing memory and the processor are coupled with each other.
  • a computer-readable storage medium stores program code, where the program code includes a manner for executing any of the above-mentioned first, second, or third aspects Some or all of the instructions in the operation.
  • the aforementioned computer-readable storage medium is located in a communication device.
  • the embodiments of the present application provide a computer program product, which when the computer program product runs on a communication device, causes the communication device to perform any of the above-mentioned first, second, or third aspects Part or all of the operation.
  • a chip in an eighth aspect, includes a processor, and the processor is configured to perform part or all of the operations in any one of the first aspect, the second aspect, or the third aspect.
  • a communication system includes one or more of the following:
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a first communication device sending a first request message to a second communication device
  • FIG. 3 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device;
  • FIG. 4 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device;
  • FIG. 5 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device and exchanging first configuration information and second configuration information;
  • Fig. 6 is a schematic diagram of a first communication device sending a second request message to a second communication device
  • FIG. 7 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device
  • FIG. 8 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device
  • FIG. 9 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 15 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 16 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 17 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 18 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the communication device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, user agent, or User device.
  • the communication device in this application may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, and a personal digital assistant (PDA) , Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices (for example, vehicle-mounted communication units), wearable devices, terminal devices in the future 5G network or future evolution of public land mobile communications
  • the communication device in the embodiment of the present application may also be a processor or system chip used to implement corresponding functions in the various devices mentioned above. This embodiment of the application does not limit this.
  • the access network equipment in the embodiments of the present application may be equipment used to communicate with the communication device in the present application, and the access network equipment may be an evolved NodeB (evolved NodeB, eNB or eNodeB) in the LTE system. It can be a wireless controller in a cloud radio access network (CRAN) scenario, or the access network device can also be a relay station, access point, in-vehicle device, wearable device, and access in the future 5G network. Network access equipment or access network equipment in a future evolved PLMN network, or road site unit (RSU), etc., are not limited in the embodiment of the present application.
  • CRAN cloud radio access network
  • RSU road site unit
  • the communication device or access network device in the embodiment of the present application may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes browser, address book, word processing software, instant messaging software and other applications.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • Fig. 1 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the method shown in FIG. 1 may be executed by the first communication device.
  • the method shown in FIG. 1 includes steps 101 and 102. Steps 101 and 102 will be described in detail below.
  • the first communication device acquires first configuration information.
  • the foregoing first configuration information includes configuration information of a first side uplink radio bearer, the first side uplink radio bearer is used to carry a first unicast service, and the first unicast service is a first communication The unicast service between the device and the second communication device, wherein the first side link is a wireless link between the first communication device and the second communication device.
  • the foregoing first side link radio bearer may include any one of SL-DRB and SL-SRB, or the foregoing first side link radio bearer includes both SL-DRB and SL-SRB.
  • the first configuration information includes SL-DRB configuration information.
  • the configuration information of SL-DRB may include one or more of the following information: QoS flow to SL-DRB mapping relationship information, packet data convergence protocol (packet data convergence protocol, PDCP) configuration information, wireless link Road control layer (radio link control, RLC) configuration information, and logical channel (logical channel, LCH) configuration information.
  • packet data convergence protocol packet data convergence protocol
  • RLC radio link control layer
  • LCH logical channel
  • each QoS flow has the same QoS parameters, and the QoS parameters may be 5G quality of service identifier (5G QoS identifier, 5QI) or quality of service flow identifier (QoS flow identifier, QFI) or V2X quality of service identifier (V2X QoS) identifier, VQI), or other QoS parameters that can reflect service reliability, delay, priority, transmission rate, etc.
  • 5G QoS identifier, 5QI quality of service flow identifier
  • QFI quality of service flow identifier
  • V2X QoS V2X quality of service identifier
  • the PDCP configuration information, RLC configuration information, and LCH configuration information are described in detail below.
  • the PDCP configuration information includes one or more of the following information:
  • a timer discardTimer used to control the time that a PDCP service data unit (SDU) can be stored in the PDCP cache;
  • Timer t-Reordering used to wait for out-of-order data packets in the reordering function
  • the PDCP layer can deliver data packets out of order to the upper layer
  • the PDCP layer adopts sidelink data compression, and sidelink data compression related configuration information
  • the security configuration adopted by the PDCP entity including whether to use encryption and/or integrity protection;
  • the security algorithm integrated protection algorithm and encryption algorithm
  • key used by the PDCP entity
  • the PDCP entity will correspond to two or more RLC entities and LCH;
  • the relevant configuration of the PDCP layer header compression algorithm such as whether to adopt header compression, etc.
  • the configuration information related to sidelink data compression may include the size of the compression buffer, the dictionary used for compression, etc.; the above duplication mechanism means that the PDCP entity copies the PDCP PDU, and The mechanism that is submitted to two or more RLC entities associated for processing and transmission.
  • the RLC configuration information includes the mode adopted by the RLC entity, for example, acknowledged mode (AM)/unacknowledged mode (UM)/transparent mode (TM).
  • AM acknowledged mode
  • UM unacknowledged mode
  • TM transparent mode
  • the specific information contained in the RLC configuration information is also different.
  • the following describes the specific information contained in the RLC configuration information in various modes.
  • the RLC configuration information also includes any one or more of the following: the SN length of the RLC layer PDU, the timer t-PollRetransmit that controls the initiation of poll retransmission, and the control how many RLC PDUs are sent After that, the poll parameter pollPDU needs to be initiated to control how many bytes are sent after the RLC PDU needs to be initiated poll parameter pollByte, or the maximum number of retransmissions at the RLC layer maxRetxThreshold;
  • the RLC configuration information also includes: the SN length of the RLC layer PDU;
  • the RLC configuration also includes any one or more of the following: the SN length of the RLC layer PDU, the timer t-Reassembly that controls the RLC layer to wait for segmentation, or the control RLC layer to avoid Timer t-StatusProhibit for frequently sending status reports;
  • the RLC entity configuration further includes: the SN length of the RLC layer PDU, and/or the timer t-Reassembly that controls the RLC layer to wait for segmentation.
  • the LCH configuration information includes one or more of the following information:
  • the identifier of the logical channel group to which the LCH belongs
  • logical channel priority logical channel prioritization, LCP processing
  • priority referring to the priority of the logical channel itself
  • priority bit rate prioritised bit rate, PBR
  • token bucket Bucket size duration BSD
  • Carrier information that can transmit data in LCH
  • the resource mode (mode) information of the data in the LCH can be transmitted, for example, mode 1 (mode 1) or mode 2 (mode 2);
  • the parameter set (numerology) information of the resource that can transmit the data in the LCH such as subcarrier interval, cyclic prefix length, resource time domain duration, whether it can be configured to authorize resources, etc.;
  • the parameter SR-DelayTimerApplied that controls whether the LCH can delay triggering the SR.
  • the aforementioned mode 1 corresponds to the manner in which the base station schedules resources
  • the aforementioned mode 2 corresponds to the manner in which the communication device itself selects resources.
  • the foregoing first configuration information may further include resource configuration information of a unicast connection for unicast communication between the first communication device and the second communication device, synchronization source configuration information, and capability information of the first communication device.
  • the foregoing resource configuration information may include carrier information available for the radio bearer of the first side link, or resource pool configuration or bandwidth part (bandwidth part, BWP) configuration, etc. For example, indicating which carriers/resource pools/BWPs the second communication device can receive and send the data or control signaling of the unicast connection.
  • carrier information available for the radio bearer of the first side link or resource pool configuration or bandwidth part (bandwidth part, BWP) configuration, etc. For example, indicating which carriers/resource pools/BWPs the second communication device can receive and send the data or control signaling of the unicast connection.
  • the foregoing synchronization source configuration information is used to indicate the synchronization source of the first communication device when performing the first unicast service.
  • the synchronization of the first communication device to perform the first unicast service may be the first communication device itself or a satellite. and many more.
  • the foregoing capability information of the first communication device is used to indicate the capabilities that the first communication device can support when performing side-link unicast communication, for example, whether to support the PDCP replication mechanism, whether to support the side-link data compression, and so on.
  • the foregoing first side link radio bearer is a radio bearer that can meet service requirements corresponding to the QoS information of the first unicast service.
  • the first configuration information can be exchanged between the first communication device and the second communication device.
  • the first communication device and the second communication device are enabled to execute the first unicast service according to the first configuration information, thereby meeting the service requirements of the first unicast service.
  • acquiring the first configuration information by the first communication device includes: the first communication device determines the first configuration information according to the QoS information of the first unicast service.
  • the first communication device may determine the SL that matches the QoS of the first unicast service according to the pre-configured (all) QoS flow and the SL-DRB configuration mapping relationship, and the QoS information of the first unicast service. -DRB, thereby generating first configuration information (exemplarily, the first configuration information may include configuration information of SL-DRB matching the QoS of the first unicast service).
  • the first communication device sends first configuration information to the second communication device, and the second communication device receives the first configuration information.
  • the method shown in FIG. 1 is applicable to the situation that there is a unicast connection between the first communication device and the second communication device, and it is also applicable to the situation that there is no unicast connection between the first communication device and the second communication device. Case.
  • a unicast connection already exists between the first communication device and the second communication device, and a side chain of the unicast connection already exists between the first communication device and the second communication device
  • the first communication device sends the first configuration information to the second communication device.
  • the service requirement corresponding to the QoS information of the first unicast service may also be referred to as the service requirement of the first unicast service.
  • the foregoing first side link radio bearer may be a radio bearer that can meet service requirements corresponding to the QoS information of the first unicast service.
  • the first configuration information is exchanged between the communication devices, so that the first communication
  • the device and the second communication device can update the configuration of the side link radio bearer of the existing unicast connection according to the first configuration information, so that the first unicast service can be satisfied when the first unicast service is subsequently executed.
  • the service requirements corresponding to the QoS information of the service are exchanged between the communication devices, so that the first communication
  • the device and the second communication device can update the configuration of the side link radio bearer of the existing unicast connection according to the first configuration information, so that the first unicast service can be satisfied when the first unicast service is subsequently executed.
  • the method shown in FIG. 1 further includes: the first communication device configures the side link radio bearer of the existing unicast connection according to the first configuration information The parameters are updated.
  • the side link radio bearer of the existing unicast connection when the side link radio bearer of the existing unicast connection does not meet the service requirements corresponding to the quality of service QoS information of the first unicast service, update the side link radio of the existing unicast connection.
  • the configuration parameters of the bearer can enable the side link radio bearer of the existing unicast connection to meet the service requirements corresponding to the QoS information of the first unicast service, so that the first unicast service can be performed normally.
  • the first communication device before the first communication device sends the first configuration information to the second communication device, it may be determined whether there is a unicast connection between the first communication device and the second communication device, and When there is a unicast connection between the first communication device and the second communication device, whether the side link radio bearer of the existing unicast connection can meet the service requirements corresponding to the QoS information of the first unicast service.
  • the method shown in FIG. 1 further includes: the first communication device determines whether a unicast connection exists between the first communication device and the second communication device; and there is already a unicast connection between the first communication device and the second communication device.
  • the first communication device determines whether the side link radio bearer of the aforementioned existing unicast connection meets the service requirement corresponding to the QoS information of the first unicast service.
  • the side link radio bearer of the existing unicast connection may be The configuration information of the bearer determines the QoS information of the unicast service that the side link radio bearer of the existing unicast connection can provide, and then compares the QoS information of the unicast service that can be provided with the QoS information of the first unicast service Information comparison, by determining whether the QoS information of the first unicast service is included in the QoS information of the unicast service that can be provided, to determine whether the side link radio bearer of the existing unicast connection can meet the requirements of the first unicast service The service requirements corresponding to the QoS information of the service.
  • the first communication device determines whether the side link radio bearer of the existing unicast connection meets the service requirements corresponding to the QoS information of the first unicast service, which specifically includes: non-access of the first communication device
  • the layer indicates the first information to the access layer of the first communication device; the access layer of the first communication device determines according to the first information that the side link radio bearer of the existing unicast connection does not meet the QoS of the first unicast service
  • the foregoing first information includes QoS information of the first unicast service, or the first information includes QoS information of the first unicast service and identification information of the second communication device.
  • step 102 in the method shown in FIG. 1 is executed, and the first communication device sends the The second communication device sends the first configuration information.
  • the side link radio bearer of the existing unicast connection meets the service requirements corresponding to the QoS information of the first unicast service (in this case, the side link radio bearer of the existing unicast connection may not be updated. Bearer configuration parameters)
  • step 102 may not be executed, and the service data of the first unicast service may be directly exchanged between the first communication device and the second communication device.
  • the unicast connection establishment can be divided into two ways. Way to describe.
  • the process of establishing a unicast connection between the first communication device and the second communication device may be as shown in FIG. 2.
  • FIG. 2 between the first communication device and the second communication device
  • the steps to establish a unicast connection are as follows:
  • the non-access layer of the first communication device obtains the first configuration information from the access layer of the first communication device
  • the non-access stratum of the first communication device sends a first request message to the non-access stratum of the second communication device.
  • the non-access layer of the first communication device may actively obtain the first configuration information from the access layer of the first communication device, or it may be that the non-access layer of the first communication device passes
  • the first configuration information is obtained in the form of receiving the first configuration information sent by the access layer of the first communication device.
  • the first request message is used to establish a first unicast connection between the first communication device and the second communication device, and the first request message includes first configuration information.
  • the connection is used to transmit service data of the first unicast service between the first communication device and the second communication device.
  • the first communication device directly carries the first configuration information in the first request message during the establishment of the unicast connection, so that the second communication device can obtain it during the establishment of the unicast connection. Go to the first configuration information.
  • the second communication device may cooperate with the first communication device to complete the establishment of the first unicast connection, and after the establishment of the first unicast connection is completed, send a message to the first communication device.
  • a communication device sends a unicast connection establishment complete message to notify the first communication device that the establishment of the first unicast connection has been completed.
  • step 300 may be performed before step 301.
  • the non-access layer of the first communication device indicates one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and 2. Identification information of the communication device, or QoS information of the first unicast service.
  • the identification information of the first communication device includes the application layer identification and/or the non-access layer identification of the first communication device and/or the source layer 2 identification (source L2 ID) of the first communication device.
  • the identification information of the second communication device includes the application layer identification and/or the non-access layer identification of the second communication device and/or the source layer 2 identification (source L2 ID) of the second communication device.
  • the non-access layer of the first communication device can trigger the access layer of the first communication device to send the first communication device to the non-access layer of the first communication device by indicating the above information to the access layer of the first communication device.
  • Configuration information so that the non-access layer of the first communication device can obtain the first configuration information.
  • FIG. 3 is a schematic diagram of the process of establishing a unicast connection between the first communication device and the second communication device.
  • the process shown in Figure 3 includes:
  • the non-access layer of the first communication device indicates any one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and information about the second communication device. Identification information and QoS information of the first unicast service.
  • the access layer of the first communication device obtains configuration information of the first unicast connection, and sends the configuration information of the first unicast connection to the non-access layer of the first communication device.
  • the configuration information of the foregoing first unicast connection is the first configuration information.
  • the non-access layer of the first communication device carries the first configuration information and other upper layer information (for example, user information, etc., which specifically may include authentication information and/or security encryption information, etc.) in the unicast connection establishment request.
  • the unicast connection establishment request message is sent to the access layer, and the access layer is instructed to send it out by broadcasting.
  • the access layer of the first communication device sends a unicast connection establishment request message in a broadcast manner according to the instruction of the non-access layer of the first communication device.
  • the unicast connection establishment request message may be transmitted through a certain broadcast SL-DRB corresponding to the V2X service to which the unicast connection belongs, that is, the unicast connection establishment request message is performed together with other broadcast data transmission.
  • a field such as the SDU-type field
  • the V2X service to which the unicast connection request message depends may correspond to multiple broadcast SL-DRBs. In this case, the unicast connection establishment request message may be transmitted through the SL-DRB with the highest relative priority.
  • the unicast connection establishment request message can also be transmitted through a special SL-SRB.
  • the configuration of the SL-SRB adopts the default configuration, and the SL-SRB exists before the unicast connection is established.
  • the access layer of the second communication device receives the unicast connection establishment request message, and transfers the unicast connection establishment request message to the non-access layer of the second communication device.
  • the non-access layer of the second communication device parses the unicast connection establishment request message, obtains the first configuration information and other upper layer configuration information, and instructs the access layer to transmit a unicast connection establishment completion message.
  • the access layer of the second communication device obtains the first configuration information and other upper layer configuration information, establishes the SL-DRB of the first unicast connection, and sends it to the access layer of the first communication device in a unicast or broadcast manner.
  • the unicast connection establishment complete message indicates that the establishment of the first unicast connection is complete.
  • the non-access layer of the first communication device sends the first request message to the non-access layer of the second communication device, essentially through the access layer of the first communication device and
  • the access layer of the second communication device indirectly implements sending the first request message or the unicast connection establishment request message to the non-access layer of the second communication device (see steps 404 and 405).
  • the access layer of the first communication device may use multiple methods to obtain the configuration information of the first unicast connection.
  • the configuration information of the first unicast connection can be obtained from the access network device. This situation will be described in detail below with reference to FIG. 5.
  • Fig. 5 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device. Compared with the process shown in FIG. 4, the process shown in FIG. 5 adds steps 401a and 401b, and these two steps are described below.
  • the access layer of the first communication apparatus sends a third request message to the access network device to obtain first configuration information.
  • the first communication apparatus receives first configuration information sent by an access network device.
  • the foregoing third request message may specifically be radio resource control (radio resource control, RRC) signaling.
  • RRC radio resource control
  • a third request message (step 401a) can be sent to the access network device, and the third request message can carry V2X unicast information (such as the first communication device And the layer 2 identification (L2 ID) of the second communication device, the type of communication (cast) (specifically, it may be unicast, multicast or broadcast), QoS information, etc.
  • the access network device provides first configuration information for the first communication device through RRC signaling.
  • the first configuration information may include the mapping relationship between QoS flow and SL-DRB, and the configuration of SL-DRB. Resource pool configuration, synchronization source configuration, etc.
  • the above-mentioned first configuration information may also be obtained from a system message broadcast by the access network device.
  • the foregoing first configuration information may also be pre-configured.
  • the first communication device may determine the first configuration information by the mapping relationship between the QoS information and the SL-DRB stored in advance.
  • the configuration of the SL-DRB of the first unicast connection of the second communication device may completely follow the first communication device sent by the first communication device.
  • the configuration information that is, the receiving configuration and the sending configuration of the SL-DRB of the first unicast connection of the second communication device may both be obtained from the first configuration information.
  • the receiving configuration of the SL-DRB of the first unicast connection of the second communication device may be obtained from the first configuration information, and the sending configuration of the SL-DRB of the first unicast connection of the second communication device may be the same as that of the first unicast connection.
  • One configuration information is different. This situation will be described below with reference to FIG. 5.
  • the process of the second communication device obtaining the configuration information of the sending side of the SL-DRB of the first unicast connection and sending the configuration information to the second communication device is step 406a and step 406b.
  • the second communication apparatus sends fourth request information to the second access network device.
  • the second communication apparatus receives second configuration information sent by the second access network device.
  • the access layer may send the fourth information to the second access network device through step 406a.
  • Request message to obtain the sending side configuration of the SL-DRB of the first unicast connection.
  • the second communication device After the second communication device obtains the configuration of the sending side of the SL-DRB of the first unicast connection, when communicating with the first communication device, it needs to ensure that the first communication device adopts the corresponding receiving side configuration, and the second communication device can
  • the second configuration information (which can be carried by the unicast establishment completion message in step 407) is sent to the first communication device, so that the first communication device obtains the receiving side configuration corresponding to the SL-DRB of the first unicast connection.
  • the second communication device may send a unicast connection establishment complete message to the first communication device through step 407, and the unicast connection establishment complete message carries the foregoing second configuration information.
  • the first communication device and the second communication device may obtain corresponding configuration information from the first access network device and the second access network device, respectively, where the first access network device and the second access network device
  • the second access network equipment can be the same equipment or different equipment.
  • the second way the unicast establishment request message does not carry the first configuration information.
  • the process of establishing a unicast connection between the first communication device and the second communication device may be as shown in FIG. 6.
  • FIG. 6 between the first communication device and the second communication device
  • the steps of establishing a unicast connection and transmitting the first configuration information are as follows:
  • the non-access layer of the first communication device sends a second request message to the non-access layer of the second communication device;
  • the access layer of the first communication device sends the first configuration information to the access layer of the second communication device.
  • the second request message is used to request the establishment of a second unicast connection between the first communication device and the second communication device, and the second unicast connection is used to establish a second unicast connection between the first communication device and the second communication device. Transmit the service data of the first unicast service.
  • the first configuration information is directly sent to the access layer of the second communication device through the access layer of the first communication device.
  • the first communication device in order to trigger the access layer of the first communication device to send the first configuration information to the access layer of the second communication device, the first communication device may further execute:
  • the non-access layer of the first communication device indicates any one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and information about the second communication device Identification information, QoS information of the first unicast service.
  • the identification information of the first communication device may include the application layer identification and/or the non-access layer identification of the first communication device and/or the source layer 2 identification (source L2 ID) of the first communication device;
  • the identification information of the communication device may include the application layer identification and/or the non-access layer identification of the second communication device and/or the source layer 2 identification (source L2 ID) of the second communication device.
  • the non-access layer of the first communication device can trigger the access layer of the first communication device to send the first communication device to the access layer of the second communication device by indicating information to the access layer of the first communication device.
  • the configuration information so that the second communication device obtains the first configuration information, and prepares for subsequent execution of the first unicast service.
  • FIG. 7 is a schematic diagram of the process of establishing a unicast connection between the first communication device and the second communication device.
  • the process shown in Figure 7 includes:
  • the non-access layer of the first communication device indicates any one or more of the following information to the access layer of the first communication device: unicast type indication information, identification information of the first communication device, and identification information of the second communication device Identification information and QoS information of the first unicast service.
  • the non-access layer of the first communication device generates a unicast establishment request message, sends the unicast connection establishment request message to the access layer of the first communication device, and instructs the access layer to send it out in a broadcast manner.
  • the access layer of the first communication device sends a unicast connection establishment request message in a broadcast manner according to the instruction of the non-access layer of the first communication device.
  • step 603 is the same as the specific processing procedure of step 404 above, and the description will not be repeated here.
  • the non-access layer of the second communication device parses the unicast connection establishment request message, and obtains information related to establishing the unicast connection.
  • the non-access layer of the second communication device generates a unicast establishment complete message, sends the unicast connection establishment complete message to the access layer of the second communication device, and instructs the access layer to send the unicast or broadcast Send out.
  • the access layer of the second communication device sends a unicast connection establishment complete message to the access layer of the first communication device in a unicast or broadcast manner to indicate that the second unicast connection is established.
  • the access layer of the first communication device sends the first configuration information to the access layer of the second communication device.
  • the access layer of the first communication device may transmit the first configuration information through SL-SRB.
  • subsequent non-access stratum messages can also be transmitted through SL-SRB.
  • the configuration information of the above SL-SRB may be pre-configured in the first communication device. After the first unicast connection is established, the first communication device establishes the default SL-SRB according to the pre-configuration information. -SRB transmits the first configuration information.
  • the configuration information of the above-mentioned SL-SRB may also be obtained during the establishment of a unicast connection. For example, after the access layer of the first communication device obtains the configuration information of the SL-SRB, it indicates to the non-access layer, and the above-mentioned SL-SRB The configuration information of may be carried in the unicast establishment request message sent by the non-access layer of the first communication device to the non-access layer of the second communication device.
  • Fig. 8 is a schematic diagram of a process of establishing a unicast connection between a first communication device and a second communication device. Compared with the process shown in FIG. 7, the process shown in FIG. 7 adds steps 607a and 607b, which are described below.
  • the access layer of the first communication apparatus sends a third request message to the access network device to obtain the first configuration information.
  • the first communication apparatus receives first configuration information sent by the access network device.
  • the foregoing third request message may be specifically carried in RRC signaling.
  • a third request message (step 607a) can be sent to the access network device.
  • the third request message can carry V2X unicast information (such as the layer of the first communication device and the second communication device). 2 ID (L2 ID), communication type, an exemplary communication type may specifically be unicast/multicast/broadcast) and QoS information.
  • the access network device Based on the request of the first communication device, the access network device provides first configuration information for the first communication device through RRC signaling.
  • the first configuration information may include the mapping relationship between QoS flow and SL-DRB, and the configuration of SL-DRB. Resource pool configuration, synchronization source configuration, etc.
  • the above-mentioned first configuration information may also be obtained from a system message broadcast by the access network device.
  • first configuration information may also be pre-configured.
  • the first communication apparatus when the first communication apparatus is in the coverage of the access network equipment, the first communication apparatus may pre-store the mapping relationship between QoS information and SL-DRB, And the resource configuration of SL-DRB, etc. to generate the first configuration information.
  • the identification of the communication device may be updated, and then the identification of the communication device may be transmitted to the communication device at the opposite end.
  • the identification information of the first communication device is updated.
  • the method shown in FIG. 1 further includes: the first communication device sends identification update information to the second communication device, where the identification update information is used to indicate The identification information of the second communication device.
  • the non-access layer of the first communication device is the PC5 signaling layer or the V2X layer of the first communication device, and the access layer of the first communication device is the RRC layer or SL of the first communication device.
  • RRC layer is the PC5 signaling layer or the V2X layer of the first communication device
  • the access layer of the first communication device is the RRC layer or SL of the first communication device.
  • the non-access layer of the second communication device may also be the PC5 signaling layer or the V2X layer, or the access layer of the second communication device may also be the RRC layer or the SL RRC layer.
  • FIG. 9 corresponds to the method shown in FIG. 1, and the definition and explanation of related content in the method shown in FIG. 1 are also applicable to the method shown in FIG. 9.
  • FIG. 9 Repeated description is appropriately omitted in the method shown.
  • FIG. 9 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the method shown in FIG. 9 may be executed by the second communication device.
  • the method shown in FIG. 9 includes steps 701 and 702. Steps 701 and 702 will be described in detail below.
  • the second communication device receives first configuration information sent by the first communication device.
  • the foregoing first configuration information includes configuration information of a first side uplink radio bearer, and the first side uplink radio bearer is used to carry the first unicast service between the first communication device and the second communication device , And the first side uplink is a wireless link between the first communication device and the second communication device.
  • the second communication apparatus determines configuration information of the first side uplink radio bearer according to the first configuration information.
  • the above-mentioned first side uplink bearer may include only SL-DRB, or only SL-SRB, or both SL-DRB and SL-SRB.
  • the SL-DRB configuration information includes one or more of the following information: QoS flow to SL-DRB mapping relationship information, PDCP configuration information, RLC configuration information, and LCH configuration information.
  • the foregoing first side link radio bearer is a radio bearer that can meet service requirements corresponding to the QoS information of the first unicast service.
  • the first configuration information can be exchanged between the first communication device and the second communication device.
  • the first communication device and the second communication device are enabled to execute the first unicast service according to the first configuration information, thereby meeting the service requirements of the first unicast service.
  • the second communication device receives the first configuration information sent by the first communication device, including:
  • the non-access layer receives the first request message sent by the non-access layer of the first communication device to establish a first unicast connection between the first communication device and the second communication device.
  • the foregoing first request message includes first configuration information, and the first unicast connection is used to transmit service data of the first unicast service between the first communication device and the second communication device.
  • the second communication device After receiving the first request message, the second communication device can establish a first unicast connection with the first communication device.
  • first unicast connection For the specific process of establishing the first unicast connection, refer to the establishment described in the first manner above. The process of unicast connection.
  • the method shown in FIG. 9 further includes: the non-access layer of the second communication device receives the first communication device The second request message sent by the non-access layer to establish a second unicast connection between the first communication device and the second communication device, wherein the second unicast connection is used for the first communication device and the second communication device
  • the service data of the first unicast service is transmitted between the devices; the second communication device receives the first configuration information sent by the first communication device, including: the access layer of the second communication device receives the data sent by the access layer of the first communication device The first configuration information.
  • the second communication device After receiving the second request message, the second communication device can establish a second unicast connection together with the first communication device.
  • the second unicast connection For the specific process of establishing the second unicast connection, refer to the establishment described in the second way above. The process of unicast connection.
  • the method shown in FIG. 9 further includes: the second communication device receives identification update information sent by the first communication device, where the identification update information is used to indicate the updated identification information of the first communication device.
  • the first communication device and the second communication device are described below with reference to FIG. Second, the unicast communication method between communication devices will be described in detail.
  • FIG. 10 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the method shown in FIG. 10 may be executed by the first communication device.
  • the method shown in FIG. 10 includes steps 1001 to 1006, which are described in detail below.
  • the first communication device initiates a new unicast service.
  • the new unicast service in step 1001 may be equivalent to the first unicast service mentioned above.
  • the first communication device determines whether there is a unicast connection between the first communication device and the second communication device.
  • the first communication device may determine whether there is a single communication with the second communication device by determining whether to establish and maintain a group of SL-SRB and/or SL-DRB for unicast communication with the second communication device. Broadcast connection. If there is such an SL-SRB/SL-DRB, there is a unicast connection, otherwise there is no.
  • step 1002 When it is determined in step 1002 that there is no unicast connection between the first communication device and the second communication device, in order to realize unicast communication, a unicast connection needs to be established between the first communication device and the second communication device. Then, unicast communication can be performed, that is, step 1003 and step 1006 are performed.
  • the unicast connection can be established according to the first method described above, or the unicast connection can be established according to the second method described above.
  • the specific unicast connection establishment process and the first configuration information For interaction refer to the related content in the first and second methods above.
  • step 1004 When it is determined in step 1002 that there is currently a unicast connection between the first communication device and the second communication device, it can be judged whether the unicast connection can meet the service requirements of the new unicast service initiated by the first communication device. That is, step 1004 is executed. If the existing unicast connection can meet the service requirements of the new unicast service, then unicast communication can be performed based on the existing unicast connection, that is, step 1006 is executed, and if there is When the unicast connection cannot meet the service requirements of the new unicast service, then it is necessary to update the configuration information for the existing unicast connection again, that is, perform step 1005.
  • the first communication device sends first configuration information to the second communication device.
  • step 1005 the first communication device sends first configuration information to the second communication device. After receiving the first configuration information, the second communication device compares the existing configuration information according to the content in the first configuration information. The configuration of the unicast connection is updated.
  • the first communication device and the second communication device perform unicast data transmission.
  • FIG. 11 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 11 is a further refinement of the process of unicast communication between the first communication device and the second communication device on the basis of FIG. 10.
  • the method shown in FIG. 11 can be executed by the first communication device.
  • the method shown in 11 includes steps 2001 to 2008, and these steps are described in detail below.
  • the first communication device initiates a new unicast service.
  • the first communication device determines whether there is a unicast connection between the first communication device and the second communication device.
  • step 2003 When there is no unicast connection between the first communication device and the second communication device, perform steps 2003 and 2009 to realize unicast communication; when there is a unicast connection between the first communication device and the second communication device, perform step 2004 By step 2008, the existing unicast connection is used to implement unicast communication between the first communication device and the second communication device.
  • the non-access layer of the first communication device sends the QoS information of the new unicast service to the second communication device.
  • the second communication device can determine the service requirements of the new unicast service. After receiving the information, the second communication device can send the information to the first communication device.
  • the communication device sends feedback information, which is used to feed back to the first communication device whether the second communication device can support the new unicast service initiated by the first communication device (or whether the new unicast service initiated by the first communication device can be satisfied Business needs). If the second communication device can support the new unicast service initiated by the first communication device, then continue to perform steps 2005 to 2009; otherwise, stop performing steps 2005 to 2009 and stop unicast communication.
  • the non-access layer of the first communication device sends instruction information to the access layer of the first communication device.
  • the instruction information includes the QoS information of the new unicast service and the layer 2 ID (L2 ID).
  • the L2 ID in the instruction information in step 2005 is the L2 ID of the second communication device.
  • the access layer of the first communication device judges whether the new unicast service can be carried by the existing SL-DRB.
  • the access layer of the first communication device may determine whether the new unicast service can be carried by the existing SL-DRB according to the instruction information received from the non-access layer of the first communication device.
  • step 2009 When the new unicast service can be carried by the existing SL-DRB, perform step 2009 to transmit the unicast data; and when the existing unicast connection cannot meet the service requirements of the new unicast service, then it is necessary Update the configuration information for the existing unicast connection again, that is, perform steps 2007 and 2008.
  • the first communication device obtains the SL-DRB configuration corresponding to the QoS information of the new unicast service, and generates first configuration information.
  • the foregoing first configuration information includes SL-DRB configuration information corresponding to QoS information of the new unicast service.
  • the methods for obtaining the SL-DRB configuration information corresponding to the QoS information are not the same.
  • mapping relationship between VQI and SL-DRB and the configuration of the corresponding SL-DRB may be pre-configured.
  • the communication device can send a service request message to the base station.
  • the message carries V2X unicast information (such as initiating communication device and destination).
  • L2 ID of the communication device, cast type) and QoS information, etc. based on the request of the communication device, the base station configures the mapping relationship between VQI and SL-DRB for the UE through RRC signaling, and the corresponding SL-DRB configuration;
  • the SIB signaling broadcast by the base station includes the mapping relationship between the VQI and SL-DRB, and the corresponding SL-DRB configuration, Then follow the configuration of SIB broadcast. If the SIB signaling does not include the above configuration, the UE can enter the RRC connected state, send a service request message to the base station, and then obtain the mapping relationship between VQI and SL-DRB.
  • the communication device After the communication device obtains the foregoing mapping relationship between VQI and SL-DRB, it can obtain the SL-DRB configuration information corresponding to the QoS information of the new unicast service according to the mapping relationship.
  • the first communication device sends the first configuration information to the second communication device.
  • the communication device may be updated with the identification periodically or irregularly, and the updated identification information may be transmitted to the peer device. Therefore, the embodiment of the present application also provides another communication method.
  • communication devices can exchange and update identification information to update the identification of the communication device. This communication method will be described below with reference to FIG. 12.
  • FIG. 12 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the method shown in FIG. 12 may be executed by the first communication device.
  • the method shown in FIG. 12 includes steps 3001 and 3002, which will be introduced below.
  • the first communication device obtains identification update information.
  • the aforementioned identification update information includes: the updated identification information of the first communication device 7000.
  • the first communication device sends the identification update information to the second communication device via a side link.
  • the foregoing side link is a wireless link between the first communication device and the second communication device to send the identification update information to the second communication device.
  • the corresponding unicast communication service data can be normally transmitted between the first communication device and the second communication device transmission.
  • the identification update information further includes: identification information of the first communication device before the update.
  • the communication device transmits normally.
  • the identification information of the first communication device includes the application layer identification of the first communication device and/or the source layer 2 identification of the first communication device.
  • FIG. 13 is a schematic diagram of a unicast communication process according to an embodiment of the present application.
  • FIG. 13 mainly shows the unicast communication process when the device identification of the communication device is updated.
  • the process shown in FIG. 13 includes 4001 to 4010, which are described in detail below.
  • the first communication device and the second communication device currently have a first unicast connection
  • the first unicast connection maintains a set of SL-DRBs
  • the first communication device and the second communication device are based on the set of SL-DRBs.
  • DRB (a group of SL-DRBs maintained by the first unicast connection) performs unicast communication
  • the device ID of the first communication device is X
  • the device ID of the first communication device is Y.
  • the source L2ID and destination L2 ID carried in the sent data packet are filled with X and Y respectively;
  • the device identification of the device may be updated, that is, step 4002 is performed.
  • the device identification of the second communication device is updated from Y to Y'.
  • the second communication device itself may update its own device identification regularly or irregularly.
  • the device identification may include an application layer identification and/or a non-access layer identification and/or a source layer 2 ID.
  • the second communication apparatus sends a device identification update message to the first communication apparatus.
  • the foregoing device identification update message may be a PC5-S message, and the foregoing device identification update message may also be referred to as an L2 ID update request (L2 ID update request) message.
  • L2 ID update request L2 ID update request
  • the above device identification update message may only include the source L2 ID updated by the second communication device.
  • the above device identification update message may also include both the source L2 ID before the update of the second device and the source L2 ID after the update of the second communication device.
  • the first communication apparatus sends a device identification update response message to the second communication apparatus.
  • the foregoing device identification update response message may also be referred to as an L2 ID update response (L2 ID update response) message, and the device identification update message is used to indicate that the first communication apparatus has successfully received the device identification update message.
  • L2 ID update response L2 ID update response
  • the non-receiving layer of the first communication device notifies the access layer of the first communication device to update the L2 ID.
  • step 4005 may be omitted, and step 4006 may be performed directly.
  • the access layer of the first communication device updates the L2 ID associated with the SL-DRB of the first unicast connection.
  • the access layer of the first communication device after receiving the update instruction of the non-access layer, updates the destination L2 ID associated with the sending side of the group of SL-DRBs corresponding to the first unicast connection from Y to Y', that is, the destination L2 ID carried in the newly generated MAC PDU of this group of SL-DRB data packets is filled with Y'.
  • the first communication device clears the HARQ receiving process associated with the source L2 ID Y, and filters out the data packets with the source L2 ID Y that have been received by the physical layer, or the The HARQ process and the physical layer with the L2 ID of Y do not define any operations, and the data packets from the source L2 with the ID of Y resolved by the MAC layer are filtered out.
  • the indicated destination L2 ID is Y'(the destination L2 ID in the previously assembled MAC PDU has been filled with Y, but the data is still
  • the physical layer retransmits and continues to retransmit without changing the data).
  • the receiving side of the set of SL-DRBs corresponding to the unicast connection is associated with the source L2 IDs Y and Y'within a period of time. During this period of time, the first communication device receives the source L2 IDs Y and Y' The data is delivered to the corresponding SL-DRB in the group of SL-DRBs for processing according to the side link LCH ID.
  • the access layer (which may be the MAC layer or the SL-RRC layer) of the first communication device may start a timer.
  • the L2 ID associated with the SL-DRB on the receiving side at the same time is Y And Y'.
  • the timing duration of the timer can be predefined by the protocol (the duration of the timer is related to the average time interval t for initial transmission and retransmission of a transport block and the maximum number of HARQ retransmissions n.
  • the timing duration of the timer can be defined as t*n), or pre-configured, or configured by the network through SIB signaling or RRC dedicated signaling, or the L2 ID update request message directly indicates the timing duration of the timer.
  • the first communication device receives data with the source L2 ID of Y and Y'.
  • the timer expires, the first communication device only receives the data with the source L2 ID of Y'.
  • the non-receiving layer of the second communication device notifies the access layer of the second communication device to update the L2 ID.
  • the non-access stratum instructs the access stratum to update the source L2 ID.
  • step 4007 may be omitted, and step 4008 may be performed directly.
  • the access layer of the second communication device updates the L2 ID associated with the SL-DRB of the first unicast connection.
  • the access layer of the second communication device may update the source L2 ID associated with the sending side of a group of SL-DRBs corresponding to the first unicast connection from Y to Y', that is, the newly generated group of SL-DRB data packets
  • the source L2 ID carried in the MAC PDU is filled with Y', or when the MAC layer submits a newly generated MAC PDU to the PHY layer, the indicated source L2 ID is Y'(the source L2 ID in the previously assembled MAC PDU has been filled with Y, However, the data is still retransmitted at the physical layer, and the retransmission continues without changing the data).
  • the second communication device clears the HARQ receiving process with the destination L2 ID Y, and filters out the data packets with the destination L2 ID Y that have been received by the physical layer, or the received destination L2
  • the HARQ process with ID Y and the physical layer do not define any operations, and the destination L2 that is parsed by the MAC layer and the data packets sent with ID Y are filtered out.
  • the access layer of the second communication device may also update the destination L2 ID associated with the receiving side of a group of SL-DRBs corresponding to the first unicast connection to Y and Y' (Before the update, the destination L2 ID is Y).
  • the second communication device receives the data with the source L2 ID as X and the destination L2 ID as Y and Y', and they are all delivered to the group according to the side link LCH ID
  • the corresponding SL-DRB in the SL-DRB is processed.
  • the access layer of the second communication device may start a timer.
  • the second communication device receives data with source L2 ID X and destination L2 ID Y and Y'. According to the sidelink LCH ID, it can be submitted to the corresponding SL-DRB in the group of SL-DRBs for processing; when the timer is running, the second communication device receives the data whose source L2 ID is X and destination L2 ID is Y and Y'. After the timer expires, the second communication device only receives the data whose destination L2 ID is Y'.
  • the first communication device receives the second unicast data sent by the second communication device, and the source L2 ID of the second unicast data is Y.
  • the above-mentioned second unicast data may be unicast data sent by the second communication device before updating the device ID. Due to data transmission delay or data transmission error, the first communication device may receive the data after updating the L2 ID associated with the SL-DRB. To the unicast data sent by the second communication device before the device identification is updated.
  • the first communication device receives third unicast data sent by the second communication device, where the source L2 ID of the third unicast data is Y'.
  • the above-mentioned third unicast data is the unicast data of the second communication device after the device identification is updated. Since the first communication device has updated the L2 ID associated with the SL-DRB according to the device identification update message, the first communication device The unicast data whose source L2 ID is Y'sent by the second communication device can be received.
  • the communication device after the communication device updates the L2 ID, it can also update the key of the PDCP layer encryption algorithm.
  • the updated key (for example, in a special case, the key is The source L2 ID) can be carried in the device identification update message (L2 ID update request message) together with the updated source L2 ID.
  • the access layer may send an OR before using the updated key.
  • Multiple special PDCP PDUs (which can be called end-marker PDCP PDUs) are given to the first communication device.
  • the PDCP PDU indicates an SN value, indicating that the PDCP PDU before the SN is performed with the original key and L2 ID Encrypted, subsequent PDCP PDUs are encrypted using the new key and L2 ID.
  • the PDCP layer of the first communication device After receiving the special PDCP PDU, the PDCP layer of the first communication device decrypts the PDCP PDU before the SN indicated by the SN using the L2 ID and key before the update, and uses the new L2 ID and secret key for the PDCP PDU of the subsequent SN. Key for decryption.
  • a new set of SL-DRBs with the same configuration as the current SL-DRB maintained by the unicast connection is established (using security The algorithm is different from the key), and the newly established SL-DRB is initialized.
  • the second communication device uses the newly established SL-DRB to transmit and receive data of the unicast service.
  • FIG. 14 is a schematic block diagram of a first communication device according to an embodiment of the present application.
  • the first communication device 5000 shown in FIG. 14 can execute each step in the method shown in FIG. 1, and repetitive descriptions are appropriately omitted when introducing the first communication device 5000 shown in FIG. 14 below.
  • the first communication device 5000 includes:
  • the obtaining module 5001 is configured to obtain first configuration information.
  • the first configuration information includes configuration information of a first side uplink radio bearer, and the first side uplink radio bearer is used to carry the A first unicast service between a first communication device 5000 and a second communication device, where the first side uplink is a wireless link between the first communication device 5000 and the second communication device;
  • the transceiver module 5002 is configured to send the first configuration information to the second communication device.
  • the side link radio bearer of an existing unicast connection between the first communication device 5000 and the second communication device does not satisfy the service of the first unicast service
  • the transceiver module is configured to send the first configuration information to the second communication device.
  • the first communication device 5000 further includes:
  • the access layer of the first communication device 5000 determines according to the first information that the side link radio bearer of the existing unicast connection does not meet the requirements of the first unicast connection. Service requirements corresponding to the QoS information of the service.
  • the obtaining module 5001 is configured to:
  • the non-access layer of the first communication device 5000 obtains the first configuration information from the access layer of the first communication device 5000;
  • the transceiver module 5002 is used for:
  • the non-access stratum of the first communication device 5000 sends a first request message to the non-access stratum of the second communication device so as to communicate between the first communication device 5000 and the A first unicast connection is established between the second communication device.
  • the first request message includes the first configuration information
  • the first unicast connection is used to connect the first communication device 5000 to the The service data of the first unicast service is transmitted between the second communication devices.
  • the first communication device 5000 further includes:
  • the processing module 5003 when the processing module 5003 is running, (optionally) the non-access layer of the first communication device 5000 from the first communication device 5000 in the non-access layer of the first communication device 5000 Before the access layer of 5000 obtains the first configuration information, it indicates to the access layer of the first communication device 5000 any one or more of the following information: unicast type indication information, the first communication device 5000 The identification information of the second communication device and the QoS information of the first unicast service.
  • the first communication device 5000 further includes:
  • the processing module 5003 when the processing module 5003 is running, the non-access layer of the first communication device 5000 sends a second request message to the non-access layer of the second communication device, so that the A second unicast connection is established between the device 5000 and the second communication device.
  • the second unicast connection is used to transmit data between the first communication device 5000 and the second communication device. State the service data of the first unicast service;
  • the transceiver module 5002 is used for:
  • the access layer of the first communication device 5000 sends the first configuration information to the access layer of the second communication device.
  • processing module 5003 is further configured to:
  • the non-access layer of the first communication device 5000 indicates to the access layer of the first communication device 5000 any one or more of the following information: unicast type indication information, The identification information of the first communication device 5000, the identification information of the second communication device, and the QoS information of the first unicast service.
  • the transceiver module 5002 is further configured to:
  • a third request message is sent to the radio access network device, where the third request message includes the QoS information of the first unicast service, or the third request message includes the QoS information of the first unicast service and The unicast connection identifier of the unicast connection corresponding to the first unicast service;
  • the identification information of the first communication device 5000 is updated, and the transceiver module 5002 is further configured to:
  • the non-access layer of the first communication device 5000 is the PC5 signaling layer or the car networking V2X layer of the first communication device 5000, and the first communication device The access layer of 5000 is the radio resource control RRC layer of the first communication device 5000 or the radio resource control SL RRC layer of the side link.
  • FIG. 15 is a schematic block diagram of a second communication device according to an embodiment of the present application.
  • the second communication device 6000 shown in FIG. 15 can execute each step in the method shown in FIG. 9, and the repeated description will be omitted when introducing the communication device 6000 below.
  • the second communication device 6000 includes:
  • the transceiver module 6001 is configured to receive first configuration information sent by a first communication device.
  • the first configuration information includes configuration information of a first side uplink radio bearer, and the first side uplink radio
  • the bearer is used to bear the first unicast service between the first communication device and the second communication device 6000, and the first side uplink is between the first communication device and the second communication device 6000 Wireless link;
  • the determining module 6002 is configured to determine the configuration information of the first side link radio bearer according to the first configuration information.
  • the transceiver module 6001 is configured to:
  • the non-access stratum of the second communication device 6000 receives the first request message sent by the non-access stratum of the first communication device, so as to communicate between the first communication device and the The first unicast connection is established between the target communication device.
  • the first request message includes the first configuration information
  • the first unicast connection is used for the communication between the first communication device and the The second communication device 6000 transmits the service data of the first unicast service.
  • the transceiver module 6001 is configured to:
  • the non-access stratum of the second communication device 6000 receives the second request message sent by the non-access stratum of the first communication device so as to communicate between the first communication device and the A second unicast connection is established between the target communication devices.
  • the second unicast connection is used to transmit the first unicast connection between the first communication device and the second communication device 6000.
  • the access layer of the second communication device 6000 receives the first configuration information sent by the access layer of the first communication device.
  • the transceiver module 6001 is further configured to: receive identification update information sent by the first communication device, where the identification update information is used to indicate the updated identification information of the first communication device .
  • FIG. 16 is a schematic block diagram of a first communication device according to an embodiment of the present application.
  • the first communication device 7000 shown in FIG. 16 can execute each step in the method shown in FIG. 12, and the repeated description is appropriately omitted when the first communication device 7000 shown in FIG. 16 is introduced below.
  • the first communication device 7000 includes:
  • the obtaining module 7001 is configured to obtain identification update information, where the identification update information includes: updated identification information of the first communication device 7000;
  • the transceiving module 7002 is configured to send the identification update information to the second communication device through a side link.
  • the side link is between the first communication device 7000 and the second communication device. Wireless link.
  • the identification update information further includes: identification information of the first communication device 7000 before the update.
  • the identification information of the first communication device 7000 includes the application layer identification of the first communication device 7000 and/or the source layer 2 identification of the first communication device 7000.
  • FIG. 17 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • the communication device 8000 shown in FIG. 17 includes a transceiver 8001 and a processor 8002.
  • the transceiver is used for information exchange between the communication device 8000 and other communication devices.
  • the processor 8002 executes program instructions to execute the embodiments of the present application. Part or all of the operations in the communication method.
  • the communication device 8000 may further include a memory (not shown in the figure), and the memory is used to store necessary program instructions.
  • FIG. 18 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • first communication device 5000 the second communication device 6000, the first communication device 7000, and the communication device 8000 shown in FIGS. 14 to 16 may also adopt the structure of the communication device shown in FIG. 18.
  • the communication device in FIG. 18 includes a communication module 3010 and a processor 3050.
  • the communication module 3010 may be equivalent to the above transceiver 8001, and the communication module 3010 may be used for information exchange between the communication device shown in FIG. 18 and other communication devices.
  • the communication device in FIG. 18 may further include a memory 3070 for storing necessary program instructions.
  • the communication device may further include a sensor 3020, a user input module 3030, an output module 3040, an audio and video input module 3060, a memory 3070, a power supply 3080, and the like.
  • the communication device shown in FIG. 18 may execute each step of the communication method of the embodiment of the present application.
  • the processor 3050 in the communication device shown in FIG. 18 may execute each step of the communication method of the embodiment of the present application.
  • the processor 3050 executes the program instructions, the processor 3050 can execute each step of the communication method of the embodiment of the present application.
  • the communication module 3010 may include one or more modules that enable the communication device to communicate with other communication devices.
  • the communication module 3010 may include one or more of a wired network interface, a broadcast receiving module, a mobile communication module, a wireless Internet module, a local area communication module, and a location (or positioning) information module.
  • the function of the communication module 3010 can be realized by a hardware circuit, or can be realized by a hardware circuit combined with computer program instructions.
  • the processor 3050 may include one or more processors, for example, the processor 3050 may include one or more central processing units, or include a central processing unit and a graphics processor, or include an application processor and a coprocessor (For example, micro control unit or neural network processor). When the processor 3050 includes multiple processors, the multiple processors may be integrated on the same chip, or each may be an independent chip.
  • a processor may include one or more physical cores, where the physical core is the smallest processing module.
  • the memory 3070 stores a computer program, and the computer program may include an operating system program 3071 and/or an application program 3072.
  • Typical operating systems such as Microsoft’s Windows, Apple’s MacOS, etc. are used in desktop or notebook systems, as well as systems developed by Google based on Android( ) Systems and other systems used in mobile terminals.
  • the memory 3070 may be one or more of the following types: flash memory, hard disk type memory, micro multimedia card type memory, card type memory (such as SD or XD memory), random access memory (random access memory) , RAM), static random access memory (static RAM, SRAM), read-only memory (read only memory, ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), programmable Read-only memory (programmable ROM, PROM), magnetic memory, magnetic disk or optical disk.
  • the memory 3070 may also be a network storage device on the Internet, and the system may perform operations such as updating or reading the memory 3070 on the Internet.
  • the processor 3050 is used to directly or indirectly execute the computer program in the memory 3070.
  • the processor 3050 executes the operating system program 3072 to run the operating system on the system and implement various functions of the operating system, and/or execute one or more
  • the application program 3071 runs the application to execute the method or operation involved in the embodiment of the present application.
  • the aforementioned memory 3070 may store a computer program (the computer program is a program corresponding to the communication method of the embodiment of the present application), and when the processor 3050 directly or indirectly executes the computer program, the processor 3050 can execute the embodiment of the present application Communication method.
  • the communication device shown in FIG. 18 may also include a sensor 3020, a user input module 3030, an output module 3040, an audio input module 3060, a power supply 3080, etc. These modules or units are briefly introduced below.
  • the sensor 3020 can sense some operations of the user, and the sensor 3020 can include a distance sensor, a touch sensor, and so on.
  • the sensor 3020 can sense operations such as the user touching the screen or approaching the screen.
  • the user input module 3030 is used to receive inputted digital information, character information, or contact touch operation/non-contact gestures, and receive signal input related to user settings and function control of the system.
  • the user input module 3030 includes a touch panel and/or other input devices.
  • the output module 3040 includes a display panel for displaying information input by the user, information provided to the user, or various menu interfaces of the system.
  • the display panel may be configured in the form of a liquid crystal display (LCD) or an organic light-emitting diode (OLED).
  • the touch panel may cover the display panel to form a touch display screen.
  • the output module 3040 may also include an audio output module, an alarm, a haptic module, and so on.
  • the audio and video input module 3060 is used to input audio signals or video signals.
  • the audio and video input module 3060 may include a camera and a microphone.
  • the power supply 3080 can receive external power and internal power under the control of the processor 3050, and provide power required by the various modules of the entire communication device during operation.
  • connection relationship of the modules in FIG. 18 is only an example.
  • the modules in the communication device shown in FIG. 18 may also be connected in other connection modes.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

本申请提供了一种通信方法和通信装置，涉及通信技术领域，以更灵活地进行单播通信。其中，该通信方法包括：第一通信装置获取第一配置信息；第一通信装置向第二通信装置发送该第一配置信息；其中，该第一配置信息包括第一侧行链路无线承载的配置信息，该第一侧行链路无线承载用于承载该第一通信装置和该第二通信装置之间的第一单播业务，其中，该第一侧行链路为第一通信装置和第二通信装置之间的无线链路。本申请通过在通信装置之间交互承载与单播业务有关的无线承载的配置信息，能够更灵活地进行单播业务数据的传输，满足单播业务的业务需求。

Description

通信方法和通信装置
本申请要求于2019年01月16日提交中国专利局、申请号为201910041462.0、申请名称为“通信方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，并且更具体地，涉及一种通信方法和通信装置。
背景技术
在终端设备之间进行侧行通信时，可以以单播通信的方式在两个终端设备之间传输单播业务数据。传统的方案一般是在建立单播连接的过程中配置好侧行链路无线承载，侧行链路无线承载的配置通常是预定义好的，然后再基于该侧行链路无线承载进行单播通信，这种通信方法的缺点是灵活性不高。
发明内容
本申请提供一种通信方法和通信装置，以提高单播通信的灵活性。
第一方面，提供了一种通信方法，该方法包括：第一通信装置获取第一配置信息；第一通信装置向第二通信装置发送第一配置信息。
其中，上述第一配置信息包括第一侧行链路无线承载的配置信息，第一侧行链路无线承载用于承载第一通信装置和第二通信装置之间的第一单播业务，第一侧行链路为第一通信装置和第二通信装置之间的无线链路。
上述第一侧行链路承载可以包括侧行链路数据无线承载(sidelink data radio bearer，SL-DRB)、侧行链路信令无线承载(sidelink signalling radio bearer，SL-SRB)等等。也就是说，上述第一侧行链路承载既可以只包括SL-DRB，也可以只包括SL-SRB，也可以既包括SL-DRB又包括SL-SRB。
可选地，SL-DRB的配置信息包括以下信息中的一种或者多种：服务质量QoS流到SL-DRB的映射关系信息，分组数据汇聚协议PDCP配置信息，无线链路控制层RLC配置信息，逻辑信道LCH配置信息。
可选地，上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载。
当上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载时，通过在第一通信装置和第二通信装置之间交互第一配置信息，能够使得第一通信装置和第二通信装置根据该第一配置信息来执行第一单播业务，进而满足第一单播业务的业务需求。
可选地，上述第一通信装置获取第一配置信息，包括：第一通信装置根据第一单播业 务的QoS信息确定第一配置信息。
本申请中，通过在通信装置之间交互承载单播业务的侧行链路无线承载的配置信息，使得通信装置之间能够根据侧行链路无线承载的配置信息更好地进行单播业务数据的传输。
结合第一方面，在第一方面的某些实现方式中，第一通信装置和第二通信装置之间已存在单播连接，在第一通信装置和第二通信装置之间已存在的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求的情况下，第一通信装置向第二通信装置发送第一配置信息。
上述第一单播业务的QoS信息对应的业务需求也可以称为第一单播业务的业务需求。
上述第一通信装置和第二通信装置之间已存在的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求，可以是指在利用该已存在单播连接的侧行链路无线承载来传输第一单播业务的业务数据时，不能满足第一单播业务的QoS信息对应的业务需求。
可选地，当已有的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求时，上述方法还包括：所述第一通信装置根据所述第一配置信息对所述已存在的单播连接的侧行链路无线承载的配置参数进行更新。
本申请实施例中，当已有的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求时，通过在通信装置之间交互第一配置信息，使得第一通信装置和第二通信装置可以根据依据该第一配置信息对已有的单播连接的侧行链路无线承载的配置进行更新，进而在后续执行第一单播业务时，能够满足第一单播业务的QoS信息对应的业务需求。
可选地，上述方法还可以包括：第一通信装置确定第一通信装置和第二通信装置之间是否已存在单播连接；在第一通信装置和第二通信装置之间已存在单播连接的情况下，第一通信装置确定上述已存在的单播连接的侧行链路无线承载是否满足第一单播业务的QoS信息对应的业务需求。
在确定已存在的单播连接的侧行链路无线承载是否满足第一单播业务的QoS信息对应的业务需求时，可以根据单播连接的配置中包括的QoS流到SL-DRB的映射来判断。
示例性的，当第一单播业务的QoS信息包括在已有的QoS流信息中时，则确定已存在的单播连接的侧行链路无线承载能够满足第一单播业务的QoS信息对应的业务需求；而当第一单播业务的QoS信息没有包括在已有的QoS流信息中时，则确定已存在的单播连接的侧行链路无线承载不能满足第一单播业务的QoS信息对应的业务需求。
结合第一方面，在第一方面的某些实现方式中，上述方法还可以包括：第一通信装置的非接入层向第一通信装置的接入层指示第一信息；第一通信装置的接入层根据第一信息确定已存在的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求。
示例性的，上述第一信息包括第一单播业务的QoS信息，或者，上述第一信息包括第一单播业务的QoS信息和第二通信装置的标识信息。
本申请实施例中，通过第一通信装置的非接入层和第一通信装置的接入层的交互，能够使得第一通信装置的接入层获取与第一单播业务相关的第一信息，进而可以根据第一信 息来确定已存在的单播连接的侧行链路无线承载是否能够满足第一单播业务的QoS信息对应的业务需求。
应理解，在上述第一通信装置的非接入层向第一通信装置的接入层指示第一信息时，既可以显式的方式来指示第一信息，也可以以隐式的方式来指示第一信息。
结合第一方面，在第一方面的某些实现方式中，第一通信装置和第二通信装置之间当前不存在单播连接，上述第一通信装置获取第一配置信息，具体包括：第一通信装置的非接入层从第一通信装置的接入层获取第一配置信息；上述第一通信装置向第二通信装置发送第一配置信息，具体包括：第一通信装置的非接入层向第二通信装置的非接入层发送第一请求消息，以在第一通信装置和第二通信装置之间建立第一单播连接。
示例性的，上述第一请求消息包括第一配置信息，第一单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
当通信装置之间不存在单播连接时，第一通信装置的非接入层能够通过与第一通信装置的接入层的交互来获取第一配置信息，然后基于该第一配置信息生成第一请求消息，并在向第二通信装置发送第一请求消息的过程中实现向第二通信装置传输第一配置信息。
结合第一方面，在第一方面的某些实现方式中，(可选的)在第一通信装置的非接入层从第一通信装置的接入层获取第一配置信息之前，上述方法还包括：第一通信装置的非接入层向第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息，或者，第一单播业务的QoS信息。
第一通信装置的非接入层在从第一通信装置的接入层获取第一配置信息之前(可选)，通过向第一通信装置的接入层指示上述信息，便于第一通信装置的非接入层从第一通信装置的接入层获取第一配置信息。比如，第一通信装置的非接入层向第一通信装置的接入层指示了上述信息之后，第一通信装置的接入层可以向第一通信装置的非接入层反馈或者发送上述第一配置信息(通过第一通信装置的非接入层向第一通信装置的接入层指示信息，可以触发第一通信装置的接入层向第一通信装置的非接入层反馈上述第一配置信息)。
结合第一方面，在第一方面的某些实现方式中，第一通信装置和第二通信装置之间当前不存在单播连接，上述方法还包括：第一通信装置的非接入层向第二通信装置的非接入层发送第二请求消息，以在第一通信装置和第二通信装置之间建立第二单播连接，其中，该第二单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据；上述第一通信装置向第二通信装置发送第一配置信息，包括：第一通信装置的接入层向第二通信装置的接入层发送第一配置信息。
本申请实施例中，当通信装置之间不存在单播连接时，通过先在第一通信装置和第二通信装置之间建立第二单播连接，便于后续基于该第二单播连接通过第一通信装置的接入层向第二通信装置的接入层发送第一配置信息。
结合第一方面，在第一方面的某些实现方式中，(可选的)在第一通信装置的接入层向第二通信装置的接入层发送第一配置信息之前，上述方法还包括：第一通信装置的非接入层向第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息，第一单播业务的QoS信息。
本申请实施例中，第一通信装置的非接入层通过向第一通信装置的接入层指示上述信息，能够触发第一通信装置的接入层向第二通信装置的接入层发送第一配置信息。
结合第一方面，在第一方面的某些实现方式中，上述方法还包括：第一通信装置向无线接入网设备发送第三请求消息；上述第一通信装置接收无线接入网设备发送的第一配置信息。
示例性的，上述第三请求消息包括第一单播业务的QoS信息，或者，第三请求消息包括第一单播业务的QoS信息和第一单播业务对应的单播连接的单播连接标识。
上述通过与接入网设备的交互来获取第一配置信息的方式，便于根据接入网设备对配置信息进行控制。
结合第一方面，在第一方面的某些实现方式中，第一通信装置的标识信息被更新，上述方法还包括：第一通信装置向第二通信装置发送标识更新信息，该标识更新信息用于指示更新后的第二通信装置的标识信息。
本申请实施例通过将标识更新信息发送给第二通信装置，使得第一通信装置和第二通信装置进行单播通信时，相应的单播通信业务数据能够正常的在第一通信装置和第二通信装置之间传输。
结合第一方面，在第一方面的某些实现方式中，上述第一通信装置的非接入层为第一通信装置的PC5信令层或者车联网V2X层，第一通信装置的接入层是第一通信装置的无线资源控制RRC层或者侧行链路的无线资源控制SL RRC层。
第二方面，提供了一种通信方法，该方法包括：第二通信装置接收第一通信装置发送的第一配置信息；第二通信装置根据第一配置信息确定第一侧行链路无线承载的配置信息。
其中，上述第一配置信息包括第一侧行链路无线承载的配置信息，第一侧行链路无线承载用于承载第一通信装置和第二通信装置之间的第一单播业务，第一侧行链路为第一通信装置和第二通信装置之间的无线链路。
本申请实施例中，通过在通信装置之间交互承载单播业务的侧行链路无线承载的配置信息，使得通信装置之间能够根据侧行链路无线承载的配置信息更好地进行单播业务数据的传输。
结合第二方面，在第二方面的某些实现方式中，第一通信装置和第二通信装置之间当前不存在单播连接，第二通信装置接收第一通信装置发送的第一配置信息，具体包括：
第二通信装置的非接入层接收第一通信装置的非接入层发送的第一请求消息，以在第一通信装置和第二通信装置之间建立第一单播连接。
其中，上述第一请求消息包括第一配置信息，第一单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
结合第二方面，在第二方面的某些实现方式中，第一通信装置和第二通信装置之间当前不存在单播连接，上述方法还包括：第二通信装置的非接入层接收第一通信装置的非接入层发送的第二请求消息，以在第一通信装置和第二通信装置之间建立第二单播连接；上述第二通信装置接收第一通信装置发送的第一配置信息，具体包括：第二通信装置的接入层接收第一通信装置的接入层发送的第一配置信息。
其中，上述第二单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
结合第二方面，在第二方面的某些实现方式中，上述方法还包括：第二通信装置接收 第一通信装置发送的标识更新信息，标识更新信息用于指示第一通信装置更新后的标识信息。
第三方面，提供了一种通信方法，该方法包括：第一通信装置获取标识更新信息，所述标识更新信息包括：所述第一通信装置更新后的标识信息；所述第一通信装置通过侧行链路向第二通信装置发送所述标识更新信息，其中，所述侧行链路为所述第一通信装置和所述第二通信装置之间的无线链路。
本申请实施例中，通过将标识更新信息发送给第二通信装置，使得第一通信装置和第二通信装置进行单播通信时，相应的单播通信业务数据能够正常的在第一通信装置和第二通信装置之间传输。
结合第三方面，在第三方面的某些实现方式中，所述标识更新信息还包括：所述第一通信装置更新前的标识信息。
通过在标识更新信息中保留第一通信装置更新前的标识信息，能够确保第一通信装置和第二通信装置之间在标识更新之前传输的单播通信业务数据也能够在第一通信装置和第二通信装置正常传输。
结合第三方面，在第三方面的某些实现方式中，所述第一通信装置的标识信息包括所述第一通信装置的应用层标识和/或所述第一通信装置的源层2标识。
第四方面，提供一种通信装置，该装置可以是终端设备，也可以是终端设备中的装置，比如芯片，或者是能够和终端设备匹配使用的装置。一种设计中，该通信装置可以包括执行第一方面、第二方面或者第三方面中所描述的方法/操作/步骤/动作所对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。
第五方面，提供了一种通信装置，该装置可以是终端设备，也可以是终端设备中的装置，比如芯片，或者是能够和终端设备匹配使用的装置，该装置包括：处理器和收发器，还可以包括存储器。该处理器用于调用存储器存储的程序代码以执行上述第一方面、第二方面或者第三方面中的任意一种方式中的部分或全部操作。
可选地，上述存储器为非易失性存储器。
可选地，上述存储器与处理器互相耦合在一起。
第六方面，提供了一种计算机可读存储介质，计算机可读存储介质存储了程序代码，其中，程序代码包括用于执行上述第一方面、第二方面或者第三方面中的任意一种方式中的部分或全部操作的指令。
可选地，上述计算机可读存储介质位于通信装置内。
第七方面，本申请实施例提供一种计算机程序产品，当计算机程序产品在通信装置上运行时，使得通信装置执行上述第一方面、第二方面或者第三方面中的任意一种方式中的部分或全部操作。
第八方面，提供了一种芯片，所述芯片包括处理器，所述处理器用于执行上述第一方面、第二方面或者第三方面中的任意一种方式中的部分或全部操作。
第九方面，提供了一种通信系统，所述通信系统包括以下中的一种或多种：
如第四方面所述的通信装置；
如第五方面所述的通信装置；
如第六方面所述的计算机可读存储介质；
如第七方面所述的计算机程序产品；或者，
如第八方面所述的芯片。
附图说明
图1是本申请实施例的通信方法的示意性流程图；
图2是第一通信装置向第二通信装置发送第一请求消息的示意图；
图3是第一通信装置和第二通信装置之间建立单播连接的过程的示意图；
图4是第一通信装置和第二通信装置之间建立单播连接的过程的示意图；
图5是第一通信装置和第二通信装置之间建立单播连接并交互第一配置信息和第二配置信息的过程的示意图；
图6是第一通信装置向第二通信装置发送第二请求消息的示意图；
图7是第一通信装置和第二通信装置之间建立单播连接的过程的示意图；
图8是第一通信装置和第二通信装置之间建立单播连接的过程的示意图；
图9是本申请实施例的通信方法的示意性流程图；
图10是本申请实施例的通信方法的示意性流程图；
图11是本申请实施例的通信方法的示意性流程图；
图12是本申请实施例的通信方法的示意性流程图；
图13是本申请实施例的通信方法的示意性流程图；
图14是本申请实施例的通信装置的示意性框图；
图15是本申请实施例的通信装置的示意性框图；
图16是本申请实施例的通信装置的示意性框图；
图17是本申请实施例的通信装置的示意性框图；
图18是本申请实施例的通信装置的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于多种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的第五代(5 thgeneration，5G)系统或新无线(new radio，NR)等。
本申请实施例中的通信装置可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请中的通信装置还可以是蜂窝电话、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、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备(例如，车载通信单元)、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile  network，PLMN)中的终端设备等，本申请实施例中的通信装置还可以是前述提到的各种设备中用以实现相应功能的处理器或者系统芯片。本申请实施例对此并不限定。
本申请实施例中的接入网设备可以是用于与本申请中的通信装置进行通信的设备，该接入网设备可以是LTE系统中的演进型基站(evolved NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该接入网设备还可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的接入网设备或者未来演进的PLMN网络中的接入网设备，或者路边装置(road site unit，RSU)等，本申请实施例并不限定。
在本申请实施例中的通信装置或接入网设备可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。其中，硬件层可以包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
本申请实施例可以应用在设备到设备(device to device，D2D)通信或者车联网(vehicle to everything，V2X)通信等通信装置之间进行直接通信的场景中。
应理解，在本申请中，各个实施例中的步骤并非都是严格按照序号所示先后顺序来执行的，只要按照符合逻辑的顺序执行即可。另外，在本申请中，各个步骤之间也并不是都存在依赖关系，没有依赖关系的步骤可以独立执行。
图1是本申请实施例的通信方法的示意性流程图。图1所示的方法可以由第一通信装置执行，图1所示的方法包括步骤101和102，下面对步骤101和102进行详细的介绍。
101、第一通信装置获取第一配置信息。
示例性的，上述第一配置信息包括第一侧行链路无线承载的配置信息，该第一侧行链路无线承载用于承载第一单播业务，该第一单播业务是第一通信装置和第二通信装置之间的单播业务，其中，上述第一侧行链路为第一通信装置和第二通信装置之间的无线链路。
上述第一侧行链路无线承载可以包括SL-DRB和SL-SRB中的任意一种，或者，上述第一侧行链路无线承载既包括SL-DRB又包括SL-SRB。
当上述第一侧行链路无线承载包括SL-DRB时，上述第一配置信息包括SL-DRB的配置信息。
示例性的，SL-DRB的配置信息可以包括以下信息中的一种或者多种：QoS流到SL-DRB的映射关系信息，分组数据汇聚协议(packet data convergence protocol，PDCP)配置信息，无线链路控制层(radio link control，RLC)配置信息，逻辑信道(logical channel，LCH)配置信息。
示例性的，每个QoS流具有相同的QoS参数，该QoS参数可以是5G服务质量标识(5G QoS identifier，5QI)或者服务质量流标识(QoS flow identifier，QFI)或者V2X服务质量标识(V2X QoS identifier，VQI)，或者其他能够反映业务可靠性、时延、优先级、传输速率等的QoS参数。
下面对PDCP配置信息，RLC配置信息，LCH配置信息进行详细的介绍。
PDCP配置信息包括下列信息中的一种或者多种：
用于控制一个PDCP服务数据单元(service data unit，SDU)在PDCP缓存中可存储的时间的定时器discardTimer；
用于在重排序功能中等待乱序数据包的定时器t-Reordering；
PDCP层是否可以向上层乱序递交数据包；
PDCP层是否采用侧行链路(sidelink)数据压缩，以及侧行链路(sidelink)数据压缩的相关配置信息；
PDCP层PDU采用的序列号(sequence number，SN)的长度；
PDCP实体采用的安全配置，包括是否采用加密和/或完整性保护；
PDCP实体采用的安全算法(完整性保护算法和加密算法)和/或密钥等；
PDCP是否采用复制(duplication)机制以及复制的配置，如果采用复制机制，则该PDCP实体会对应两个/多个RLC实体和LCH；；
PDCP层头压缩算法的相关配置，如是否采取头压缩等。
示例性的，侧行链路(sidelink)数据压缩的相关配置信息可以包括压缩缓存(buffer)的大小，压缩采用的字典等；上述复制(duplication)机制是指PDCP实体对PDCP PDU进行复制，并递交到关联的两个/多个RLC实体进行处理和传输的机制。
RLC配置信息包括RLC实体采用的模式，例如，确认模式(acknowledged mode，AM)/非确认模式(unacknowledged mode，UM)/透明模式(transparent mode，TM)。
根据RLC实体采用的模式的不同，RLC配置信息具体包含的信息也有所不同，下面对各种模式下RLC配置信息具体包含的信息进行介绍。
当RLC实体被配置为采用AM模式时，RLC配置信息还包括以下中任一项或多项：RLC层PDU的SN长度，控制发起poll重传的定时器t-PollRetransmit，控制发送多少个RLC PDU后需要发起poll的参数pollPDU，控制发送多少字节RLC PDU后需要发起poll的参数pollByte，或者，RLC层最大重传次数maxRetxThreshold；
当RLC实体被配置采用UM模式时，RLC配置信息还包括：RLC层PDU的SN长度；
如果接收RLC实体被配置为采用AM模式，RLC配置还包括以下中任一项或多项：RLC层PDU的SN长度，控制RLC层等待分段的定时器t-Reassembly，或者，控制RLC层避免频繁发送状态报告的定时器t-StatusProhibit；
如果接收RLC实体被配置为采用UM模式，RLC实体配置还包括：RLC层PDU的SN长度，和/或，控制RLC层等待分段的定时器t-Reassembly。
LCH配置信息包括下列信息中的一种或者多种：
LCH标识；
LCH所属逻辑信道组的标识；
进行逻辑信道优先级(logical channel prioritization，LCP)处理的相关参数，例如，优先级(priority)(指的是逻辑信道本身的优先级)，优先比特速率(prioritised bit rate，PBR)，令牌桶大小持续时间(bucket size duration，BSD)；
可以传输LCH中的数据的载波信息；
可以传输该LCH中的数据的资源模式(mode)信息，例如，模式1(mode 1)或者模式2(mode 2)；
可以传输该LCH中数据的资源的参数集(numerology)信息，如子载波间隔，循环前缀长度，资源时域持续时间，是否可以是配置授权资源等；
控制该LCH是否可以触发调度请求(scheduling request，SR)的参数SR-mask；或者，
控制该LCH是否可以延迟触发SR的参数SR-DelayTimerApplied。
上述模式1对应基站调度资源的方式，上述模式2对应通信装置自身选择资源的调度方式。
可选地，上述第一配置信息还可以包括第一通信装置和第二通信装置之间进行单播通信的单播连接的资源配置信息、同步源配置信息，以及第一通信装置的能力信息。
示例性的，上述资源配置信息可以包括第一侧行链路无线承载可用的载波信息，或资源池配置或带宽部分(band width part，BWP)配置等。例如指示第二通信装置可以在哪些载波/资源池/BWP上接收和发送该单播连接的数据或控制信令。
上述同步源配置信息用于指示第一通信装置在执行第一单播业务时的同步源，例如，第一通信装置执行第一单播业务的同步可以是第一通信装置本身，也可以是卫星等等。
上述第一通信装置的能力信息用于指示第一通信装置在进行侧行链路单播通信时所能够支持的能力，例如，是否支持PDCP复制机制，是否支持侧行链路数据压缩等。
可选地，上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载。
当上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载时，通过在第一通信装置和第二通信装置之间交互第一配置信息，能够使得第一通信装置和第二通信装置根据该第一配置信息来执行第一单播业务，进而满足第一单播业务的业务需求。
可选地，上述第一通信装置获取第一配置信息，包括：第一通信装置根据第一单播业务的QoS信息确定第一配置信息。
示例性的，第一通信装置可以根据预配置的(所有的)QoS流和SL-DRB配置映射关系，以及第一单播业务的QoS信息，确定与第一单播业务的QoS相匹配的SL-DRB，从而生成第一配置信息(示例性的，第一配置信息可以包括与第一单播业务的QoS相匹配的SL-DRB的配置信息)。
102、第一通信装置向第二通信装置发送第一配置信息，第二通信装置接收该第一配置信息。
本申请中，通过在通信装置之间交互承载单播业务的侧行链路无线承载的配置信息，使得通信装置之间能够根据侧行链路无线承载的配置信息更好地进行单播业务数据的传输。
在图1所示的方法既适用于第一通信装置和第二通信装置之间已经存在单播连接的情况，也可适用于第一通信装置和第二通信装置之间当前不存在单播连接的情况。
下面分别对第一通信装置和第二通信装置之间存在单播连接，以及第一通信装置和第二通信装置之间不存在单播连接的情况分别进行详细的介绍。
第一通信装置和第二通信装置之间存在单播连接的情况：
可选地，作为一个实施例，在第一通信装置和第二通信装置之间已存在单播连接，并且在第一通信装置和第二通信装置之间已存在的单播连接的侧行链路无线承载不满足第 一单播业务的服务质量QoS信息对应的业务需求的情况下，第一通信装置向第二通信装置发送第一配置信息。
上述第一单播业务的QoS信息对应的业务需求也可以称为第一单播业务的业务需求。
上述第一侧行链路无线承载可以是能够满足第一单播业务的QoS信息对应的业务需求的无线承载。
本申请中，当已有的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求时，通过在通信装置之间交互第一配置信息，使得第一通信装置和第二通信装置可以根据依据该第一配置信息对已有的单播连接的侧行链路无线承载的配置进行更新，进而在后续执行第一单播业务时，能够满足第一单播业务的QoS信息对应的业务需求。
可选地，当第一通信装置和第二通信装置之间已存在单播连接，并且在第一通信装置和第二通信装置之间已存在的单播连接的侧行链路无线承载不满足第一单播业务的服务质量QoS信息对应的业务需求时，图1所示的方法还包括：第一通信装置根据第一配置信息对已存在的单播连接的侧行链路无线承载的配置参数进行更新。
本申请中，当已存在的单播连接的侧行链路无线承载不满足第一单播业务的服务质量QoS信息对应的业务需求时，通过更新已存在的单播连接的侧行链路无线承载的配置参数，能够使得已存在的单播连接的侧行链路无线承载能够满足第一单播业务的QoS信息对应的业务需求，使得第一单播业务能够正常进行。
应理解，在图1所示的方法中，在第一通信装置向第二通信装置发送第一配置信息之前，可以先判断第一通信装置和第二通信装置之间是否存在单播连接，以及当第一通信装置和第二通信装置之间存在单播连接时，该已存在的单播连接的侧行链路无线承载是否能够满足第一单播业务的QoS信息对应的业务需求。
可选地，图1所示的方法还包括：第一通信装置确定第一通信装置和第二通信装置之间是否已存在单播连接；在第一通信装置和第二通信装置之间已存在单播连接的情况下，第一通信装置确定上述已存在的单播连接的侧行链路无线承载是否满足第一单播业务的QoS信息对应的业务需求。
示例性的，在确定已存在的单播连接的侧行链路无线承载是否满足第一单播业务的QoS信息对应的业务需求时，可以先根据已存在的单播连接的侧行链路无线承载的配置信息确定已存在的单播连接的侧行链路无线承载能够提供的单播的业务的QoS信息，然后将该能够提供的单播的业务的QoS信息与第一单播业务的QoS信息比较，通过确定第一单播业务的QoS信息是否包含在该能够提供的单播的业务的QoS信息中，确定已存在的单播连接的侧行链路无线承载能否满足第一单播业务的QoS信息对应的业务需求。
可选地，上述第一通信装置确定上述已存在的单播连接的侧行链路无线承载是否满足第一单播业务的QoS信息对应的业务需求，具体包括：第一通信装置的非接入层向第一通信装置的接入层指示第一信息；第一通信装置的接入层根据第一信息确定已存在的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对应的业务需求。
上述第一信息包括第一单播业务的QoS信息，或者，第一信息包括第一单播业务的QoS信息和第二通信装置的标识信息。
应理解，已存在的单播连接的侧行链路无线承载不满足第一单播业务的QoS信息对 应的业务需求时，执行图1所示的方法中的步骤102，第一通信装置向第二通信装置发送第一配置信息。而当已存在的单播连接的侧行链路无线承载满足第一单播业务的QoS信息对应的业务需求时(这种情况下，可以不更新已存在的单播连接的侧行链路无线承载的配置参数)，可以不执行步骤102，而可以直接在第一通信装置和第二通信装置之间交互第一单播业务的业务数据。
上文对第一通信装置和第二通信装置之间存在单播连接的情况进行了描述，下面对第一通信装置和第二通信装置之间不存在单播连接的情况进行描述。
第一通信装置和第二通信装置之间不存在单播连接的情况：
当第一通信装置和第二通信装置不存在单播连接时，需要先在第一通信装置和第二通信装置之间建立一个单播连接，然后再对配置该单播连接的侧行链路无线承载的配置参数，接下来，再利用该单播连接的侧行链路无线承载来承载第一单播业务。
在第一通信装置和第二通信装置之间建立单播连接时，根据单播建立请求消息中是否携带第一配置信息，可以将建立单播连接的方式分为两种，下面对这两种方式进行描述。
第一种方式：单播建立请求消息中携带第一配置信息。
在第一种方式下，在第一通信装置和第二通信装置之间建立单播连接的过程可以如图2所示，如图2所示，在第一通信装置和第二通信装置之间建立单播连接的步骤如下：
301、第一通信装置的非接入层从第一通信装置的接入层获取所述第一配置信息；
302、第一通信装置的非接入层向所述第二通信装置的非接入层发送第一请求消息。
示例性的，在步骤301中，第一通信装置的非接入层可以主动从第一通信装置的接入层获取第一配置信息，或者，也可以是第一通信装置的非接入层通过接收第一通信装置的接入层发送的第一配置信息的形式来获取第一配置信息。
示例性的，在步骤302中，第一请求消息是用于在第一通信装置和第二通信装置之间建立第一单播连接，并且第一请求消息包括第一配置信息，第一单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
在第一种方式下，第一通信装置是在建立单播连接的过程中直接将第一配置信息携带在第一请求消息中，使得第二通信装置在单播连接建立的过程中就能够获取到第一配置信息。
应理解，第二通信装置在接收到第一通信装置发送的第一请求消息之后，可以配合第一通信装置完成第一单播连接的建立，并在第一单播连接建立完成之后，向第一通信装置发送单播连接建立完成消息，以通知第一通信装置已完成第一单播连接的建立。
上述第一通信装置的非接入层为了从第一通信装置的接入层获取第一配置信息，还可以在步骤301之前执行步骤300。
300、第一通信装置的非接入层向第一通信装置的接入层指示以下信息中的一种或者多种：单播类型指示信息，所述第一通信装置的标识信息，所述第二通信装置的标识信息，或者，所述第一单播业务的QoS信息。
可选地，上述第一通信装置的标识信息包括第一通信装置的应用层标识和/或非接入层标识和/或第一通信装置的源层2标识(source L2 ID)。
可选地，上述第二通信装置的标识信息包括第二通信装置的应用层标识和/或非接入层标识和/或第二通信装置的源层2标识(source L2 ID)。
在步骤300中，第一通信装置的非接入层通过向第一通信装置的接入层指示上述信息，能够触发第一通信装置的接入层向第一通信装置的非接入层发送第一配置信息，使得第一通信装置的非接入层能够获取到第一配置信息。
下面结合图3以具体的实例对以第一种方式建立第一单播连接的过程进行详细的描述，图3是第一通信装置和第二通信装置之间建立单播连接的过程的示意图。图3所示的过程包括：
401、第一通信装置的非接入层向第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息以及第一单播业务的QoS信息。
402、第一通信装置的接入层获取第一单播连接的配置信息，并将该第一单播连接的配置信息发送给第一通信装置的非接入层。
示例性的，上述第一单播连接的配置信息为第一配置信息。
403、第一通信装置的非接入层将第一配置信息以及其他上层信息(例如，用户信息等，用户信息具体可以包括鉴权信息和/或安全加密信息等)携带在单播连接建立请求消息中，并将该单播连接建立请求消息发送给接入层，并指示接入层通过广播的方式向外发送。
404、第一通信装置的接入层根据第一通信装置的非接入层的指示，以广播的方式向外发送单播连接建立请求消息。
示例性的，在步骤404中，单播连接建立请求消息可以通过单播连接所属V2X业务对应的某一个广播SL-DRB进行传输，也就是将该单播连接建立请求消息随其他广播数据一起进行传输。并且，可以在该单播连接建立请求消息对应的PDCP PDU中，通过PDCP头(header)中的某个字段(如SDU-type字段)指示对应的PDCP SDU属于非接入层消息。可选的，单播连接请求消息所依附的V2X业务可能对应多个广播SL-DRB，这种情况下，可以通过相对优先级最高的SL-DRB来传输该单播连接建立请求消息。
可选的，单播连接建立请求消息也可以通过特殊的SL-SRB进行传输，SL-SRB的配置采取默认配置，在单播连接建立前SL-SRB即存在。
405、第二通信装置的接入层接收单播连接建立请求消息，并将该单播连接建立请求消息传递给第二通信装置的非接入层。
406、第二通信装置的非接入层对单播连接建立请求消息进行解析，获取第一配置信息和其他上层配置信息，并指示接入层传输单播连接建立完成消息。
407、第二通信装置的接入层获取第一配置信息和其他上层配置信息，建立第一单播连接的SL-DRB，并利用单播或者广播的方式向第一通信装置的接入层发送单播连接建立完成消息，以指示第一单播连接建立完成。
应理解，上述图3所示的步骤302中第一通信装置的非接入层向第二通信装置的非接入层发送第一请求消息，实质上是通过第一通信装置的接入层和第二通信装置的接入层间接的实现向第二通信装置的非接入层发送第一请求消息或者单播连接建立请求消息(参见步骤404和405)。
在上述步骤402中，第一通信装置的接入层可以采用多种方式来获取第一单播连接的配置信息。例如，第一单播连接的配置信息可以从接入网设备获取，下面结合图5对这种 情况进行详细说明。
图5是第一通信装置和第二通信装置之间建立单播连接的过程的示意图。与图4所示的过程相比，图5所示的过程增加了步骤401a和401b，下面对这两个步骤进行介绍。
401a、第一通信装置的接入层向接入网设备发送第三请求消息，以获取第一配置信息。
401b、第一通信装置接收接入网设备发送的第一配置信息。
示例性的，上述第三请求消息具体可以是无线资源控制(radio resource control，RRC)信令，对处于RRC连接态的第一通信装置来说，当第一通信装置的接入层接收到了第二通信装置的非接入层的指示(步骤401)后，可以向接入网设备发送第三请求消息(步骤401a)，该第三请求消息中可以携带V2X单播信息(如第一通信装置和第二通信装置的层2标识(L2 ID)，通信(cast)类型(具体可以是单播、组播或者广播))和QoS信息等。接入网设备基于第一通信装置的请求，通过RRC信令为第一通信装置提供第一配置信息，该第一配置信息可以包括QoS flow和SL-DRB的映射关系，SL-DRB的配置，资源池配置，同步源配置等。
可选地，上述第一配置信息还可以从接入网设备广播的系统消息中获取。
应理解，上述第一配置信息还可以是预先配置的，例如，第一通信装置可以预先存储的QoS信息与SL-DRB的映射关系确定第一配置信息。
应理解，在第一通信装置和第二通信装置之间进行第一单播业务时，第二通信装置的第一单播连接的SL-DRB的配置可以完全遵照第一通信装置发送的第一配置信息，也就是说，第二通信装置的第一单播连接的SL-DRB的接收配置和发送配置可以都从第一配置信息获取。
可选地，第二通信装置的第一单播连接的SL-DRB的接收配置可以从第一配置信息获取，而第二通信装置的第一单播连接的SL-DRB的发送配置可以与第一配置信息不同。下面结合图5对这种情况进行说明。
如图5所示，第二通信装置获取第一单播连接的SL-DRB的发送侧配置信息以及将该配置信息发送给第二通信装置的过程为步骤406a和步骤406b。
406a、第二通信装置向第二接入网设备发送第四请求信息。
406b、第二通信装置接收第二接入网设备发送的第二配置信息。
示例性的，对于第二通信装置来说，接入层在收到非接入层指示的第一配置信息(步骤406)后，接入层可以通过步骤406a向第二接入网设备第四请求消息来获取第一单播连接的SL-DRB的发送侧配置。
当第二通信装置获取到第一单播连接的SL-DRB的发送侧配置后，在与第一通信装置进行通信时，需要保证第一通信装置采用对应的接收侧配置，第二通信装置可以向第一通信装置发送第二配置信息(可以通过步骤407中的单播建立完成消息携带)，以使得第一通信装置获取第一单播连接的SL-DRB对应的接收侧配置。
在完成上述步骤406b后，第二通信装置可以通过步骤407向第一通信装置发送单播连接建立完成消息，该单播连接建立完成消息携带上述第二配置信息。
示例性的，在图5中，第一通信装置和第二通信装置可以分别从第一接入网设备和第二接入网设备获取相应的配置信息，这里的第一接入网设备和第二接入网设备既可以是相同的设备，也可以是不同的设备。
第二种方式：单播建立请求消息中不携带第一配置信息。
在第二种方式下，在第一通信装置和第二通信装置之间建立单播连接的过程可以如图6所示，如图6所示，在第一通信装置和第二通信装置之间建立单播连接以及传输第一配置信息的步骤如下：
501、第一通信装置的非接入层向第二通信装置的非接入层发送第二请求消息；
502、第一通信装置的接入层向第二通信装置的接入层发送第一配置信息。
示例性的，第二请求消息用于请求在第一通信装置和第二通信装置之间建立第二单播连接，该第二单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
在第二种方式下，是通过第一通信装置的接入层直接向第二通信装置的接入层发送第一配置信息。
可选地，在第二种方式下，为了触发第一通信装置的接入层向第二通信装置的接入层发送第一配置信息，第一通信装置还可以执行：
500、第一通信装置的非接入层向第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息，第一单播业务的QoS信息。
在步骤500中，第一通信装置的标识信息可以包括第一通信装置的应用层标识和/或非接入层标识和/或第一通信装置的源层2标识(source L2 ID)；第二通信装置的标识信息可以包括第二通信装置的应用层标识和/或非接入层标识和/或第二通信装置的源层2标识(source L2 ID)。
在上述步骤500中，第一通信装置的非接入层通过向第一通信装置的接入层指示信息，能够触发第一通信装置的接入层向第二通信装置的接入层发送第一配置信息，从而使得第二通信装置获取第一配置信息，进而为后续执行第一单播业务做好准备。
下面结合图7以具体的实例对以第二种方式建立第二单播连接的过程进详细的描述，图7是第一通信装置和第二通信装置之间建立单播连接的过程的示意图。图7所示的过程包括：
601、第一通信装置的非接入层向第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息以及第一单播业务的QoS信息。
602、第一通信装置的非接入层生成单播建立请求消息，将该单播连接建立请求消息发送给第一通信装置的接入层，并指示接入层通过广播的方式向外发送。
603、第一通信装置的接入层根据第一通信装置的非接入层的指示，以广播的方式向外发送单播连接建立请求消息。
步骤603的具体处理过程与上文中的步骤404的具体处理过程相同，这里不再重复描述。
604、第二通信装置的非接入层对单播连接建立请求消息解析，获取建立单播连接的相关信息。
605、第二通信装置的非接入层生成单播建立完成消息，将该单播连接建立完成消息发送给第二通信装置的接入层，并指示接入层通过单播或者广播的方式向外发送。
606、第二通信装置的接入层利用单播或者广播的方式向第一通信装置的接入层发送单播连接建立完成消息，以指示第二单播连接建立完成。
607、第一通信装置的接入层向第二通信装置的接入层发送第一配置信息。
示例性的，在步骤607中，第一通信装置的接入层可以通过SL-SRB来传输第一配置信息。当单播连接建立完成后，后续的非接入层消息也可以通过SL-SRB来进行传输。
上述SL-SRB的配置信息可以是预先配置在第一通信装置中的，当第一单播连接建立完成之后，第一通信装置根据预配置信息建立默认SL-SRB，此时可以用来通过SL-SRB传输第一配置信息。
上述SL-SRB的配置信息还可以在单播连接建立的过程中获取，例如，第一通信装置的接入层获取到SL-SRB的配置信息后，指示给非接入层，上述SL-SRB的配置信息可以携带在第一通信装置的非接入层向第二通信装置的非接入层发送的单播建立请求消息中。
图8是第一通信装置和第二通信装置之间建立单播连接的过程的示意图。与图7所示的过程相比，图7所示的过程增加了步骤607a和607b，下面对这两个步骤进行介绍。
607a、第一通信装置的接入层向接入网设备发送第三请求消息，以获取第一配置信息。
607b、第一通信装置接收接入网设备发送的第一配置信息。
示例性的，上述第三请求消息可以具体携带在RRC信令中，对处于RRC连接态的第一通信装置来说，当第一通信装置的接入层接收到了第二通信装置的非接入层的指示(步骤601)后，可以向接入网设备发送第三请求消息(步骤607a)，该第三请求消息中可以携带V2X单播信息(如第一通信装置和第二通信装置的层2 ID(L2 ID)，通信类型，示例性的通信类型具体可以是单播/组播/广播)和QoS信息等。接入网设备基于第一通信装置的请求，通过RRC信令为第一通信装置提供第一配置信息，该第一配置信息可以包括QoS flow和SL-DRB的映射关系，SL-DRB的配置，资源池配置，同步源配置等。
可选地，上述第一配置信息还可以从接入网设备广播的系统消息中获取。
应理解，上述第一配置信息还可以是预先配置的，例如，当第一通信装置处于接入网设备的覆盖范围时，第一通信装置可以预先存储的QoS信息与SL-DRB的映射关系，以及SL-DRB的资源配置等来生成第一配置信息。
在图1所示的方法中，为了提高单播通信的安全性，可以对通信装置的标识进行更新，然后将该通信装置的标识传输给对端的通信装置。
可选地，作为一个实施例，第一通信装置的标识信息被更新，图1所示的方法还包括：第一通信装置向第二通信装置发送标识更新信息，标识更新信息用于指示更新后的第二通信装置的标识信息。
本申请中，通过将更新后的通信装置的标识信息传输给对端设备，能够保证单播通信正常进行，并能提高单播通信的安全性。
可选地，作为一个实施例，第一通信装置的非接入层为第一通信装置的PC5信令层或者V2X层，第一通信装置的接入层是第一通信装置的RRC层或者SL RRC层
类似的，第二通信装置的非接入层也可以为PC5信令层或者V2X层，或者，第二通信装置的接入层也可以为RRC层或者SL RRC层。
上文结附图主要从第一通信装置的角度对本申请实施例的通信方法进行了描述，下面结合图9从第二通信装置的角度对申请实施例的通信方法进行描述。应理解，图9所示的 方法是与图1所示的方法是对应的，图1所示的方法中对相关内容的限定和解释同样适用于图9所示的方法，下面在介绍图9所示的方法时适当省略重复的描述。
图9是本申请实施例的通信方法的示意性流程图。图9所示的方法可以由第二通信装置执行，图9所示的方法包括步骤701和702，下面对步骤701和702进行详细的介绍。
701、第二通信装置接收第一通信装置发送的第一配置信息。
示例性的，上述第一配置信息包括第一侧行链路无线承载的配置信息，第一侧行链路无线承载用于承载第一通信装置和第二通信装置之间的第一单播业务，并且第一侧行链路为第一通信装置和第二通信装置之间的无线链路。
702、第二通信装置根据第一配置信息确定第一侧行链路无线承载的配置信息。
上述第一侧行链路承载既可以只包括SL-DRB，也可以只包括SL-SRB，也可以既包括SL-DRB又包括SL-SRB。
可选地，SL-DRB的配置信息包括以下信息中的一种或者多种：QoS流到SL-DRB的映射关系信息，PDCP配置信息，RLC配置信息，LCH配置信息。
可选地，上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载。
当上述第一侧行链路无线承载是能够满足第一单播业务的QoS信息对应的业务需求的无线承载时，通过在第一通信装置和第二通信装置之间交互第一配置信息，能够使得第一通信装置和第二通信装置根据该第一配置信息来执行第一单播业务，进而满足第一单播业务的业务需求。
本申请中，通过在通信装置之间交互承载单播业务的侧行链路无线承载的配置信息，使得通信装置之间能够根据侧行链路无线承载的配置信息更好地进行单播业务数据的传输。
可选地，作为一个实施例，第一通信装置和第二通信装置之间当前不存在单播连接，第二通信装置接收第一通信装置发送的第一配置信息，包括：第二通信装置的非接入层接收第一通信装置的非接入层发送的第一请求消息，以在第一通信装置和第二通信装置之间建立第一单播连接。
示例性的，上述第一请求消息包括第一配置信息，第一单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据。
当第二通信装置接收到第一请求消息之后，可以与第一通信装置共同建立第一单播连接，其中，建立第一单播连接的具体过程可以参见上文中的第一种方式描述的建立单播连接的过程。
可选地，作为一个实施例，第一通信装置和第二通信装置之间当前不存在单播连接，图9所示的方法还包括：第二通信装置的非接入层接收第一通信装置的非接入层发送的第二请求消息，以在第一通信装置和第二通信装置之间建立第二单播连接，其中，第二单播连接用于在第一通信装置和第二通信装置之间传输第一单播业务的业务数据；第二通信装置接收第一通信装置发送的第一配置信息，包括：第二通信装置的接入层接收第一通信装置的接入层发送的第一配置信息。
当第二通信装置接收到第二请求消息之后，可以与第一通信装置共同建立第二单播连接，其中，建立第二单播连接的具体过程可以参见上文中的第二种方式描述的建立单播连 接的过程。
可选地，作为一个实施例，图9所示的方法还包括：第二通信装置接收第一通信装置发送的标识更新信息，该标识更新信息用于指示第一通信装置更新后的标识信息。
为了更好地理解本申请实施例中单播连接存在和单播连接不存在时第一通信装置和第二通信装置之间进行单播通信的方式，下面结合图10对第一通信装置和第二通信装置之间的单播通信方式进行详细的描述。
图10是本申请实施例的通信方法的示意性流程图。图10所示的方法可以由第一通信装置来执行，图10所示的方法包括步骤1001至1006，下面对这些步骤进行详细的介绍。
1001、第一通信装置发起新的单播业务。
步骤1001中的新的单播业务可以相当于上文中的第一单播业务。
1002、第一通信装置确定在第一通信装置和第二通信装置之间是否存在单播连接。
在步骤1002中，第一通信装置可以通过判断是否建立和维护一组与第二通信装置进行单播通信的SL-SRB和/或SL-DRB，来确定和第二通信装置之间是否存在单播连接。如果存在这样的SL-SRB/SL-DRB，则存在单播连接，否则不存在。
当步骤1002中确定出第一通信装置和第二通信装置之间当前不存在单播连接时，为了实现单播通信，需要在第一通信装置和第二通信装置之间先建立单播连接，然后才能进行单播通信，也就是执行步骤1003和步骤1006。
1003、在第一通信装置和第二通信装置之间建立单播连接并进行第一配置信息的交互。
应理解，在步骤1003中，既可以按照上述第一种方式来建立单播连接，也可以按照上述第二种方式来建立单播连接，具体的单播连接的建立过程以及第一配置信息的交互可以参考上述第一种方式和第二种方式中的相关内容。
当步骤1002中确定出第一通信装置和第二通信装置之间当前已存在单播连接时，可以先判断该单播连接是否能够满足第一通信装置发起的新的单播业务的业务需求，也就是执行步骤1004，如果已有的单播连接能够满足新的单播业务的业务需求，那么就可以基于该已经存在的单播连接进行单播通信，也就是执行步骤1006，而如果已有的单播连接无法满足新的单播业务的业务需求时，那么，需要重新为该已存在的单播连接更新配置信息，也就是执行步骤1005。
1004、确定已存在的单播连接的侧行链路无线承载是否满足新的单播业务的业务需求。
1005、第一通信装置向第二通信装置发送第一配置信息。
也就是说，在步骤1005中，第一通信装置要向第二通信装置发送第一配置信息，第二通信装置在接收到第一配置信息之后会根据第一配置信息中的内容对已有的单播连接的配置进行更新。
1006、第一通信装置与第二通信装置进行单播数据的传输。
图11是本申请实施例的通信方法的示意性流程图。
图11是在图10的基础上对第一通信装置和第二通信装置之间进行单播通信的过程进行了进一步的细化，图11所示的方法可以由第一通信装置来执行，图11所示的方法包括步骤2001至2008，下面对这些步骤进行详细的介绍。
2001、第一通信装置发起新的单播业务。
2002、第一通信装置确定在第一通信装置和第二通信装置之间是否存在单播连接。
当第一通信装置和第二通信装置之间不存在单播连接时，执行步骤2003和2009实现单播通信；当第一通信装置和第二通信装置之间存在单播连接时，执行步骤2004至步骤2008，利用已有的单播连接实现第一通信装置和第二通信装置之间的单播通信。
2003、在第一通信装置和第二通信装置之间建立单播连接并进行第一配置信息的交互。
2004、第一通信装置的非接入层向第二通信装置发送新单播业务的QoS信息。
在步骤204中，通过向第二通信装置发送新单播业务的QoS信息，使得第二通信装置能够确定新单播业务的业务需求，第二通信装置在接收到该信息之后，可以向第一通信装置发送反馈信息，该反馈信息用于向第一通信装置反馈第二通信装置能否支持第一通信装置发起的新单播业务(或者能否满足第一通信装置发起的新单播业务的业务需求)。如果第二通信装置能够支持第一通信装置发起的新单播业务，则继续执行步骤2005至2009，否则，停止执行步骤2005至2009，停止单播通信。
2005、第一通信装置的非接入层向第一通信装置的接入层发送指示信息，该指示信息包括新单播业务的QoS信息和层2 ID(L2 ID)。
示例性的，步骤2005中的指示信息中的L2 ID为第二通信装置的L2 ID。
2006、第一通信装置的接入层判断新单播业务是否能通过已有的SL-DRB承载。
在步骤2006时，第一通信装置的接入层可以根据从第一通信装置的非接入层接收到的指示信息来判断新单播业务是否能通过已有的SL-DRB承载。
当新单播业务能够通过已有的SL-DRB来承载时，执行步骤2009进行单播数据的传输；而当已有的单播连接无法满足新的单播业务的业务需求时，那么，需要重新为该已存在的单播连接更新配置信息，也就是执行步骤2007和2008。
2007、第一通信装置获取与新单播业务的QoS信息对应的SL-DRB配置，生成第一配置信息。
示例性的，上述第一配置信息包括与新单播业务的QoS信息对应的SL-DRB配置信息。
对于不同类型的通信装置来说，获取QoS信息对应的SL-DRB配置信息的方式不太相同。
例如，对于基站覆盖范围外(Out-of-coverage)的通信装置来说，可以预配置有VQI和SL-DRB的映射关系，以及相应SL-DRB的配置。
再如，对于基站覆盖范围内(In-coverage)且处于RRC连接态的通信装置来说，该通信装置可以向基站发送业务请求消息，该消息中携带V2X单播信息(如发起通信装置和目的通信装置的L2 ID，cast类型)和QoS信息等，基站基于通信装置的请求，通过RRC信令为UE配置VQI和SL-DRB的映射关系，以及相应SL-DRB的配置；
示例性的，对于基站覆盖范围内(In-coverage)且处于RRC空闲态的通信装置，如果基站广播的SIB信令中包括该VQI和SL-DRB的映射关系，以及相应SL-DRB的配置，则遵从SIB广播的配置，如果SIB信令未包括如上配置，UE可以进入RRC连接态，向基站发送业务请求消息，进而获取VQI和SL-DRB的映射关系。
当通信装置获取了上述VQI和SL-DRB的映射关系后，就可以根据该映射关系获取与新单播业务的QoS信息对应的SL-DRB配置信息。
2008、第一通信装置向第二通信装置发送第一配置信息。
应理解，上文中对第一配置信息以及第一通信装置和第二通信装置之间建立单播连接的相关限定和解释也同样适用于图10和图11所示的方法中。
为了保证单播通信时的安全性，可以定期或者不定期的为通信装置更新标识，并将更新后的标识信息传输给对端设备。因此，本申请实施例还提供了另一种通信方法，在该通信方法中，通信装置之间可以交互更新标识信息，以更新通信装置的标识。下面结合图12对这种通信方法进行描述。
图12是本申请实施例的通信方法的示意性流程图。图12所示的方法可以由第一通信装置执行，图12所示的方法包括步骤3001和3002，下面对这两个步骤进行介绍。
3001、第一通信装置获取标识更新信息。
上述标识更新信息包括：第一通信装置7000更新后的标识信息。
3002、第一通信装置通过侧行链路向第二通信装置发送所述标识更新信息。
示例性的，上述侧行链路为第一通信装置和第二通信装置之间的无线链路向所述第二通信装置发送所述标识更新信息。
通过将标识更新信息发送给第二通信装置，使得第一通信装置和第二通信装置进行单播通信时，相应的单播通信业务数据能够正常的在第一通信装置和第二通信装置之间传输。
可选地，作为一个实施例，标识更新信息还包括：第一通信装置更新前的标识信息。
通过在标识更新信息中保留第一通信装置更新前的标识信息，能够确保第一通信装置和第二通信装置之间在标识更新之前传输的单播通信业务数据也能够在第一通信装置和第二通信装置正常传输。
可选地，作为一个实施例，第一通信装置的标识信息包括所述第一通信装置的应用层标识和/或所述第一通信装置的源层2标识。
为了对通信装置的设备标识更新后的通信过程能够有更详细的了解，下面结合图13对设备标识更新后的单播通信过程进行详细的介绍。
图13是本申请实施例的单播通信的过程的示意图。图13主要示出了通信装置的设备标识更新时的单播通信过程。图13所示的过程包括4001至4010，下面对这些过程进行详细的介绍。
在图13中，第一通信装置和第二通信装置当前存在第一单播连接，该第一单播连接维护了一组SL-DRB，第一通信装置和第二通信装置基于该组SL-DRB(第一单播连接维护的一组SL-DRB)进行单播通信，第一通信装置的设备ID为X，第一通信装置的设备ID为Y。
示例性的，对于第一通信装置来说，SL-DRB发送侧关联的源L2 ID为X(src L2ID＝X)，目的L2 ID为Y(dest L2 ID＝Y)，即该组SL-DRB发送的数据包中携带的源L2ID和目的L2 ID填充的分别为X和Y；SL-DRB接收侧关联的源L2 ID为Y(src L2 ID＝Y)，目的L2 ID为X(dest L2 ID＝X)，即SL-DRB接收侧只处理携带的源L2 ID和目的L2 ID填充的分别为Y和X的数据包。
4001、第一通信装置向第二通信装置发送第一单播数据，该第一单播数据得数据包中携带的源L2 ID＝X，目标L2 ID＝Y。
为了提高设备间进行单播通信的安全性，可以对设备的设备标识进行更新，也就是执行步骤4002。
4002、第二通信装置的设备标识由Y更新为Y’。
示例性的，在步骤4002中，可以是由第二通信装置自身定期或者不定期的对自身的设备标识进行更新。示例性的，设备标识可以包括应用层标识和/或非接入层标识和/或源层2 ID。
4003、第二通信装置向第一通信装置发送设备标识更新消息。
示例性的，上述设备标识更新消息可以是PC5-S消息，上述设备标识更新消息也可以称为L2 ID更新请求(L2 ID update request)消息。
上述设备标识更新消息可以只包括第二通信装置更新后的源L2 ID。
可选的，上述设备标识更新消息也可以既包括第二设备更新前的源L2 ID，也包括第二通信装置更新后的源L2 ID。
4004、第一通信装置向第二通信装置发送设备标识更新响应消息。
上述设备标识更新响应消息也可以称为L2 ID更新响应(L2 ID update response)消息，该设备标识更新消息用于指示第一通信装置已成功接收设备标识更新消息。
4005、第一通信装置的非接收入层通知第一通信装置的接入层更新L2 ID。
可选地，也可以没有上述步骤4005，而直接执行步骤4006。
4006、第一通信装置的接入层对第一单播连接的SL-DRB关联的L2 ID进行更新。
在步骤4006中，第一通信装置的接入层在收到非接入层的更新指示后，将第一单播连接对应的一组SL-DRB的发送侧关联的目的L2 ID由Y更新为Y’，即由这组SL-DRB的数据包新生成的MAC PDU中携带的目的L2 ID填充为Y’。在这种情况下，第一通信装置对于关联到源L2 ID为Y的接收HARQ的进程进行清空，并且将物理层已经接收到的源L2 ID为Y的数据包过滤掉，或者对关联到源L2 ID为Y的HARQ进程和物理层不定义任何操作，对于MAC层解析到的源L2 ID为Y发来的数据包则过滤掉。
或者，接入层中的MAC层向物理层(PHY)递交新生成MAC PDU时，指示的目的L2 ID为Y’(之前组好的MAC PDU中目的L2 ID已经填充了Y，但是数据还在物理层进行重传，继续重传，不对数据进行改动)。该单播连接对应的一组SL-DRB的接收侧在一段时间内关联得源L2 ID为Y和Y’，在该段时间内，第一通信装置收到源L2 ID为Y和Y’的数据，都根据侧行链路LCH ID递交给该组SL-DRB中对应的SL-DRB进行处理。
示例性的，第一通信装置的接入层(可以是MAC层或SL-RRC层)可以启动一个定时器(timer)，在定时器运行时，接收侧SL-DRB同时关联的L2 ID为Y和Y’。该定时器的定时时长可以是协议预定义的(定时器的时长与一个传输块进行初传和重传的平均时间间隔t以及最大HARQ重传次数n有关，如定时器的定时时长可以定义为t*n)，或预配置的，也可以是网络通过SIB信令或RRC专用信令进行配置，或L2 ID更新请求消息来直接指示该定时器的定时时长。在定时器运行时，第一通信装置收到源L2 ID为Y和Y’的数据，当定时器超时后，则第一通信装置只接收源L2 ID为Y’的数据。
4007、第二通信装置的非接收入层通知第二通信装置的接入层更新L2 ID。
示例性的，步骤4007中，非接入层指示接入层进行源L2 ID的更新。
可选地，也可以没有上述步骤4007，而直接执行步骤4008。
4008、第二通信装置的接入层对第一单播连接的SL-DRB关联的L2 ID进行更新。
第二通信装置的接入层可以将第一单播连接对应的一组SL-DRB的发送侧关联的源L2 ID由Y更新为Y’，即由这组SL-DRB的数据包新生成的MAC PDU中携带的源L2 ID填充为Y’，或MAC层向PHY层递交新生成MAC PDU时，指示的源L2 ID为Y’(之前组好的MAC PDU中源L2 ID已经填充了Y，但是数据还在物理层进行重传，继续进行重传，不去对数据进行改动)。在这种情况下，第二通信装置对于目的L2 ID为Y的接收HARQ的进程进行清空，并且将物理层已经接收到的目的L2 ID为Y的数据包过滤掉，或者对接收到的目的L2 ID为Y的HARQ进程和物理层不定义任何操作，对于MAC层解析到的目的L2 ID为Y发来的数据包则过滤掉。
或者，第二通信装置的接入层在收到非接入层更新指示后，还可以将第一单播连接对应的一组SL-DRB的接收侧关联的目的L2 ID更新为Y和Y’(更新之前目的L2 ID为Y)，在这段时间内第二通信装置收到源L2 ID为X，目的L2 ID为Y和Y’的数据，都根据侧行链路LCH ID递交给该组SL-DRB中对应的SL-DRB进行处理。
示例性的，第二通信装置的接入层可以启动一个定时器，在该定时器运行时，第二通信装置收到源L2 ID为X，目的L2 ID为Y和Y’的数据后，都可以根据sidelink LCH ID递交给该组SL-DRB中对应的SL-DRB进行处理；当定时器运行时，第二通信装置接收源L2 ID为X，目的L2 ID为Y和Y’的数据，当定时器超时后，第二通信装置只接收目的L2 ID为Y’的数据。
4009、第一通信装置接收第二通信装置发送的第二单播数据，该第二单播数据的源L2 ID为Y。
上述第二单播数据可以是第二通信装置在更新设备标识之前发送的单播数据，由于数据传输延迟或者数据传输错误，可能导致第一通信装置在更新了SL-DRB关联的L2 ID之后接收到第二通信装置在设备标识更新前发送的单播数据。
4010、第一通信装置接收第二通信装置发送的第三单播数据，该第三单播数据的源L2 ID为Y’。
上述第三单播数据是第二通信装置在设备标识更新后的单播数据，由于第一通信装置已经根据设备标识更新消息对SL-DRB关联的L2 ID进行了更新，因此，第一通信装置可以接收到第二通信装置发送的源L2 ID为Y’的单播数据。
可选的，为了进一步提高单播通信的安全性，当通信装置更新了L2 ID之后，还可以更新PDCP层加密算法的密钥，更新后的密钥(例如，一种特殊情况下密钥即为源L2 ID)可以和更新后的源L2 ID一起携带在设备标识更新消息(L2 ID更新请求消息)中。
示例性的，对于第二通信装置来说，在接收到PC5-S信令(携带的更新后的L2 ID和密钥)后，接入层在使用更新后的密钥前，可以发送一个或多个特殊的PDCP PDU(可以称之为end-marker PDCP PDU)给第一通信装置，该PDCP PDU中指示一个SN值，表示该SN之前的PDCP PDU都是用原来的密钥和L2 ID进行加密的，后续PDCP PDU使用新的密钥和L2 ID进行加密。第一通信装置的PDCP层收到该特殊PDCP PDU后，对SN在所指示SN之前的PDCP PDU利用更新前的L2 ID和密钥进行解密，对后续SN的PDCP  PDU利用新的L2 ID和密钥进行解密。
可选的，对于第二通信装置来说，在接收到PC5-S信令指示密钥更新后，新建立一组和当前该单播连接维护的SL-DRB配置相同的SL-DRB(采用安全算法和密钥不同)，并对新建立的SL-DRB进行初始化。第二通信装置利用新建立的SL-DRB进行单播业务的数据收发。
上文结合图1至图13对本申请实施例的通信方法进行了详细的介绍，下面结合图14至图18对本申请实施例的通信装置进行介绍。
图14是本申请实施例的第一通信装置的示意性框图。图14所示的第一通信装置5000能够执行图1所示的方法中的各个步骤，下面在介绍图14所示的第一通信装置5000时适当省略重复的描述。
第一通信装置5000包括：
获取模块5001，用于获取第一配置信息，示例性的，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置5000和第二通信装置之间的第一单播业务，所述第一侧行链路为所述第一通信装置5000和所述第二通信装置之间的无线链路；
收发模块5002，用于向所述第二通信装置发送所述第一配置信息。
本申请中，通过在通信装置之间交互承载单播业务的侧行链路无线承载的配置信息，使得通信装置之间能够根据侧行链路无线承载的配置信息更好地进行单播业务数据的传输。
可选地，作为一个实施例，在所述第一通信装置5000和所述第二通信装置之间已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的服务质量QoS信息对应的业务需求的情况下，所述收发模块用于向所述第二通信装置发送所述第一配置信息。
可选地，作为一个实施例，所述第一通信装置5000还包括：
处理模块5003，当所述处理模块5003运行时，所述第一通信装置5000的非接入层向所述第一通信装置5000的接入层指示第一信息，所述第一信息包括所述第一单播业务的QoS信息，或者，所述第一信息包括所述第一单播业务的QoS信息和所述第二通信装置的标识信息；
当所述处理模块5003运行时，所述第一通信装置5000的接入层根据所述第一信息确定所述已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的QoS信息对应的业务需求。
可选地，作为一个实施例，所述获取模块5001用于：
当所述获取模块5001运行时，所述第一通信装置5000的非接入层从所述第一通信装置5000的接入层获取所述第一配置信息；
所述收发模块5002用于：
所述收发模块5002运行时，所述第一通信装置5000的非接入层向所述第二通信装置的非接入层发送第一请求消息，以在所述第一通信装置5000和所述第二通信装置之间建立第一单播连接，示例性的，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置5000和所述第二通信装置之间传输所述第一单播业务的业务数据。
可选地，作为一个实施例，所述第一通信装置5000还包括：
处理模块5003，当所述处理模块5003运行时，(可选的)所述第一通信装置5000的非接入层在所述第一通信装置5000的非接入层从所述第一通信装置5000的接入层获取所述第一配置信息之前，向所述第一通信装置5000的接入层指示如下信息中任一种或多种：单播类型指示信息，所述第一通信装置5000的标识信息，所述第二通信装置的标识信息以及所述第一单播业务的QoS信息。
可选地，作为一个实施例，所述第一通信装置5000还包括：
处理模块5003，当所述处理模块5003运行时，所述第一通信装置5000的非接入层向所述第二通信装置的非接入层发送第二请求消息，以在所述第一通信装置5000和所述第二通信装置之间建立第二单播连接，示例性的，所述第二单播连接用于在所述第一通信装置5000和所述第二通信装置之间传输所述第一单播业务的业务数据；
所述收发模块5002用于：
所述收发模块5002运行时，所述第一通信装置5000的接入层向所述第二通信装置的接入层发送所述第一配置信息。
可选地，作为一个实施例，所述处理模块5003还用于：
当所述处理模块5003运行时，所述第一通信装置5000的非接入层向所述第一通信装置5000的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置5000的标识信息，第二通信装置的标识信息以及所述第一单播业务的QoS信息。
可选地，作为一个实施例，所述收发模块5002还用于：
向无线接入网设备发送第三请求消息，所述第三请求消息包括所述第一单播业务的QoS信息，或者，所述第三请求消息包括所述第一单播业务的QoS信息和所述第一单播业务对应的单播连接的单播连接标识；
接收所述无线接入网设备发送的所述第一配置信息。
可选地，作为一个实施例，所述第一通信装置5000的标识信息被更新，所述收发模块5002还用于：
向所述第二通信装置发送标识更新信息，所述标识更新信息用于指示所述更新后的所述第一通信装置5000的标识信息。
可选地，作为一个实施例，其特征在于，所述第一通信装置5000的非接入层为所述第一通信装置5000的PC5信令层或者车联网V2X层，所述第一通信装置5000的接入层是所述第一通信装置5000的无线资源控制RRC层或者侧行链路的无线资源控制SL RRC层。
图15是本申请实施例的第二通信装置的示意性框图。
图15所示的第二通信装置6000能够执行图9所示的方法中的各个步骤，下面在介绍通信装置6000时适当省略重复的描述。
第二通信装置6000包括：
收发模块6001，用于接收第一通信装置发送的第一配置信息，示例性的，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置和第二通信装置6000之间的第一单播业务，所述第一侧行链路为所述第一通信装置和所述第二通信装置6000之间的无线链路；
确定模块6002，用于根据所述第一配置信息确定所述第一侧行链路无线承载的配置信息。
可选地，作为一个实施例，所述收发模块6001用于：
当所述收发模块6001运行时，所述第二通信装置6000的非接入层接收所述第一通信装置的非接入层发送的第一请求消息，以在所述第一通信装置和所述目标通信装置之间建立第一单播连接，示例性的，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置和所述第二通信装置6000之间传输所述第一单播业务的业务数据。
可选地，作为一个实施例，所述收发模块6001用于：
当所述收发模块6001运行时，所述第二通信装置6000的非接入层接收所述第一通信装置的非接入层发送的第二请求消息，以在所述第一通信装置和所述目标通信装置之间建立第二单播连接，示例性的，所述第二单播连接用于在所述第一通信装置和所述第二通信装置6000之间传输所述第一单播业务的业务数据；
当所述收发模块6001运行时，所述第二通信装置6000的接入层接收所述第一通信装置的接入层发送的所述第一配置信息。
可选地，作为一个实施例，所述收发模块6001还用于：接收所述第一通信装置发送的标识更新信息，所述标识更新信息用于指示所述第一通信装置更新后的标识信息。
图16是本申请实施例的第一通信装置的示意性框图。
图16所示的第一通信装置7000能够执行图12所示的方法中的各个步骤，下面在介绍图16所示的第一通信装置7000时适当省略重复的描述。
第一通信装置7000包括：
获取模块7001，用于获取标识更新信息，所述标识更新信息包括：所述第一通信装置7000更新后的标识信息；
收发模块7002，用于通过侧行链路向第二通信装置发送所述标识更新信息，示例性的，所述侧行链路为所述第一通信装置7000和所述第二通信装置之间的无线链路。
可选地，作为一个实施例，所述标识更新信息还包括：所述第一通信装置7000更新前的标识信息。
可选地，作为一个实施例，所述第一通信装置7000的标识信息包括所述第一通信装置7000的应用层标识和/或所述第一通信装置7000的源层2标识。
图17是本申请实施例的通信装置的示意性框图。
图17所示的通信装置8000包括收发器8001和处理器8002，该收发器用于该通信装置8000和其他通信装置之间进行信息交互，该处理器8002执行程序指令，用以执行本申请实施例的通信方法中的部分或者全部操作。该通信装置8000还可以包括存储器(图中未示出)，该存储器用于存储必要的程序指令。
图18是本申请实施例的通信装置的示意性框图。
应理解，图14至图16所示的第一通信装置5000、第二通信装置6000、第一通信装置7000和通信装置8000的具体结构还可以采用如图18所示的通信装置的结构。
图18中的通信装置包括通信模块3010和处理器3050。
通信模块3010可相当于上文中的收发器8001，该通信模块3010可以用于图18所示 的通信装置和其他通信装置之间进行信息交互。
可选的，图18中的通信装置还可以包括存储器3070，用于存储必要的程序指令。
可选的，如图18所示，该通信装置还可以包括传感器3020、用户输入模块3030、输出模块3040、音视频输入模块3060、存储器3070以及电源3080等。
图18所示的通信装置可以执行本申请实施例的通信方法的各个步骤，具体地，图18所示的通信装置中的处理器3050可以执行本申请实施例的通信方法的各个步骤。当处理器3050执行程序指令时，处理器3050可以执行本申请实施例的通信方法的各个步骤。
下面对图18所示的通信装置中可能涉及的各个模块进行详细的介绍。
通信模块3010可以包括一个或多个能使该通信装置与其他通信装置之间进行通信的模块。例如，通信模块3010可以包括有线网络接口、广播接收模块、移动通信模块、无线因特网模块、局域通信模块和位置(或定位)信息模块等其中的一个或多个。该通信模块3010的功能可以通过硬件电路实现，也可以通过硬件电路结合计算机程序指令实现。
处理器3050可以包括一个或多个处理器，例如，处理器3050可以包括一个或多个中央处理器，或者包括一个中央处理器和一个图形处理器，或者包括一个应用处理器和一个协处理器(例如微控制单元或神经网络处理器)。当处理器3050包括多个处理器时，这多个处理器可以集成在同一块芯片上，也可以各自为独立的芯片。一个处理器可以包括一个或多个物理核，其中物理核为最小的处理模块。
存储器3070存储计算机程序，该计算机程序可以包括操作系统程序3071和/或应用程序3072等。典型的操作系统如微软公司的Windows，苹果公司的MacOS等用于台式机或笔记本的系统，又如谷歌公司开发的基于
Figure PCTCN2020070088-appb-000001
的安卓(
Figure PCTCN2020070088-appb-000002
)系统等用于移动终端的系统。当本申请实施例所涉及的方法或操作通过软件的方式实现时，可以认为是通过应用程序3071来具体实现的。
存储器3070可以是以下类型中的一种或多种：闪速(flash)存储器、硬盘类型存储器、微型多媒体卡型存储器、卡式存储器(例如SD或XD存储器)、随机存取存储器(random access memory,RAM)、静态随机存取存储器(static RAM,SRAM)、只读存储器(read only memory,ROM)、电可擦除可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、可编程只读存储器(programmable ROM,PROM)、磁存储器、磁盘或光盘。在其他一些实施例中，存储器3070也可以是因特网上的网络存储设备，系统可以对在因特网上的存储器3070执行更新或读取等操作。
处理器3050用于直接或者间接执行存储器3070中的计算机程序，例如处理器3050执行操作系统程序3072从而在该系统运行操作系统以及实现操作系统的各种功能，和/或执行一种或多种应用程序3071，从而运行应用以执行本申请实施例所涉及的方法或操作。例如，上述存储器3070可以存储一种计算机程序(该计算机程序是本申请实施例的通信方法对应的程序)，当处理器3050直接或间接执行该计算机程序时，处理器3050能够执行本申请实施例的通信方法。
可选的，图18所示的通信装置还可以包含传感器3020、用户输入模块3030、输出模块3040、音频输入模块3060以及电源3080等，下面对这些模块或者单元进行简单的介绍。
传感器3020可以感知用户的一些操作，传感器3020可以包括距离传感器，触摸传感 器等等。传感器3020可以感知用户触摸屏幕或者靠近屏幕等操作。
用户输入模块3030，用于接收输入的数字信息、字符信息或接触式触摸操作/非接触式手势，以及接收与系统的用户设置以及功能控制有关的信号输入等。用户输入模块3030包括触控面板和/或其他输入设备。
输出模块3040包括显示面板，用于显示由用户输入的信息、提供给用户的信息或系统的各种菜单界面等。可选的，可以采用液晶显示器(liquid crystal display，LCD)或有机发光二极管(organic light-emitting diode,OLED)等形式来配置显示面板。在其他一些实施例中，触控面板可覆盖显示面板上，形成触摸显示屏。可选的，输出模块3040还可以包括音频输出模块、告警器以及触觉模块等。
音视频输入模块3060，用于输入音频信号或视频信号。音视频输入模块3060可以包括摄像头和麦克风。
电源3080可以在处理器3050的控制下接收外部电力和内部电力，并且提供整个通信装置各个模块运行时需要的电力。
图18中各个模块的连接关系仅为一种示例，图18所示的通信装置中的各个模块还可以是以其它连接方式连接，例如，图18所示的通信装置中的部分或者所有模块通过总线连接。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而 前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种通信方法，其特征在于，包括：
    第一通信装置获取第一配置信息，其中，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置和第二通信装置之间的第一单播业务，所述第一侧行链路为所述第一通信装置和所述第二通信装置之间的无线链路；
    所述第一通信装置向所述第二通信装置发送所述第一配置信息。
  2. 如权利要求1所述的方法，其特征在于，在所述第一通信装置和所述第二通信装置之间已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的服务质量QoS信息对应的业务需求的情况下，所述第一通信装置向所述第二通信装置发送所述第一配置信息。
  3. 如权利要求2所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置的非接入层向所述第一通信装置的接入层指示第一信息，所述第一信息包括所述第一单播业务的QoS信息，或者，所述第一信息包括所述第一单播业务的QoS信息和所述第二通信装置的标识信息；
    所述第一通信装置的接入层根据所述第一信息确定所述已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的QoS信息对应的业务需求。
  4. 如权利要求1-3中任一所述的方法，其特征在于，所述第一通信装置获取第一配置信息，包括：
    所述第一通信装置的非接入层从所述第一通信装置的接入层获取所述第一配置信息；
    所述第一通信装置向所述第二通信装置发送所述第一配置信息，包括：
    所述第一通信装置的非接入层向所述第二通信装置的非接入层发送第一请求消息，以在所述第一通信装置和所述第二通信装置之间建立第一单播连接，其中，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据。
  5. 如权利要求4所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置的非接入层向所述第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，所述第一通信装置的标识信息，所述第二通信装置的标识信息以及所述第一单播业务的QoS信息。
  6. 如权利要求1所述的方法，所述方法还包括：
    所述第一通信装置的非接入层向所述第二通信装置的非接入层发送第二请求消息，以在所述第一通信装置和所述第二通信装置之间建立第二单播连接，其中，所述第二单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据；
    所述第一通信装置向所述第二通信装置发送所述第一配置信息，包括：
    所述第一通信装置的接入层向所述第二通信装置的接入层发送所述第一配置信息。
  7. 如权利要求6所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置的非接入层向所述第一通信装置的接入层指示如下信息中任一种 或多种：单播类型指示信息，第一通信装置的标识信息，第二通信装置的标识信息以及所述第一单播业务的QoS信息。
  8. 如权利要求1-7中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置向无线接入网设备发送第三请求消息，所述第三请求消息包括所述第一单播业务的QoS信息，或者，所述第三请求消息包括所述第一单播业务的QoS信息和所述第一单播业务对应的单播连接的单播连接标识；
    所述第一通信装置接收所述无线接入网设备发送的所述第一配置信息。
  9. 如权利要求1-8中任一项所述的方法，其特征在于，所述第一通信装置的标识信息被更新，所述方法还包括：
    所述第一通信装置向所述第二通信装置发送标识更新信息，所述标识更新信息用于指示所述更新后的所述第一通信装置的标识信息。
  10. 如权利要求1-9中任一项所述的方法，其特征在于，所述第一通信装置的非接入层为所述第一通信装置的PC5信令层或者车联网V2X层，所述第一通信装置的接入层是所述第一通信装置的无线资源控制RRC层或者侧行链路的无线资源控制SL RRC层。
  11. 一种通信方法，其特征在于，包括：
    第二通信装置接收第一通信装置发送的第一配置信息，其中，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置和第二通信装置之间的第一单播业务，所述第一侧行链路为所述第一通信装置和所述第二通信装置之间的无线链路；
    所述第二通信装置根据所述第一配置信息确定所述第一侧行链路无线承载的配置信息。
  12. 如权利要求11所述的方法，其特征在于，所述第二通信装置接收第一通信装置发送的第一配置信息，包括：
    所述第二通信装置的非接入层接收所述第一通信装置的非接入层发送的第一请求消息，以在所述第一通信装置和所述第二通信装置之间建立第一单播连接，其中，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据。
  13. 如权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置的非接入层接收所述第一通信装置的非接入层发送的第二请求消息，以在所述第一通信装置和所述通信装置之间建立第二单播连接，其中，所述第二单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据；
    所述第二通信装置接收第一通信装置发送的第一配置信息，包括：
    所述第二通信装置的接入层接收所述第一通信装置的接入层发送的所述第一配置信息。
  14. 如权利要求11-13中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置接收所述第一通信装置发送的标识更新信息，所述标识更新信息用于指示所述第一通信装置更新后的标识信息。
  15. 一种第一通信装置，其特征在于，包括：
    获取模块，用于获取第一配置信息，其中，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置和第二通信装置之间的第一单播业务，所述第一侧行链路为所述第一通信装置和所述第二通信装置之间的无线链路；
    收发模块，用于向所述第二通信装置发送所述第一配置信息。
  16. 如权利要求15所述的第一通信装置，其特征在于，在所述第一通信装置和所述第二通信装置之间已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的服务质量QoS信息对应的业务需求的情况下，所述收发模块用于向所述第二通信装置发送所述第一配置信息。
  17. 如权利要求16所述的第一通信装置，其特征在于，所述第一通信装置还包括：
    处理模块，当所述处理模块运行时，所述第一通信装置的非接入层向所述第一通信装置的接入层指示第一信息，所述第一信息包括所述第一单播业务的QoS信息，或者，所述第一信息包括所述第一单播业务的QoS信息和所述第二通信装置的标识信息；
    当所述处理模块运行时，所述第一通信装置的接入层根据所述第一信息确定所述已存在的单播连接的侧行链路无线承载不满足所述第一单播业务的QoS信息对应的业务需求。
  18. 如权利要求15-17中任一项所述的第一通信装置，其特征在于，所述获取模块用于：
    当所述获取模块运行时，所述第一通信装置的非接入层从所述第一通信装置的接入层获取所述第一配置信息；
    所述收发模块用于：
    所述收发模块运行时，所述第一通信装置的非接入层向所述第二通信装置的非接入层发送第一请求消息，以在所述第一通信装置和所述第二通信装置之间建立第一单播连接，其中，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据。
  19. 如权利要求18所述的第一通信装置，其特征在于，所述第一通信装置还包括：
    处理模块，当所述处理模块运行时，向所述第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，所述第一通信装置的标识信息，所述第二通信装置的标识信息以及所述第一单播业务的QoS信息。
  20. 如权利要求15所述的第一通信装置，所述第一通信装置还包括：
    处理模块，当所述处理模块运行时，所述第一通信装置的非接入层向所述第二通信装置的非接入层发送第二请求消息，以在所述第一通信装置和所述第二通信装置之间建立第二单播连接，其中，所述第二单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据；
    所述收发模块用于：
    所述收发模块运行时，所述第一通信装置的接入层向所述第二通信装置的接入层发送所述第一配置信息。
  21. 如权利要求20所述的第一通信装置，其特征在于，所述处理模块还用于：
    当所述处理模块运行时，所述第一通信装置的非接入层向所述第一通信装置的接入层指示如下信息中任一种或多种：单播类型指示信息，第一通信装置的标识信息，第二通信 装置的标识信息以及所述第一单播业务的QoS信息。
  22. 如权利要求15-21中任一项所述的第一通信装置，其特征在于，所述收发模块还用于：
    向无线接入网设备发送第三请求消息，所述第三请求消息包括所述第一单播业务的QoS信息，或者，所述第三请求消息包括所述第一单播业务的QoS信息和所述第一单播业务对应的单播连接的单播连接标识；
    接收所述无线接入网设备发送的所述第一配置信息。
  23. 如权利要求15-22中任一项所述的第一通信装置，其特征在于，所述第一通信装置的标识信息被更新，所述收发模块还用于：
    向所述第二通信装置发送标识更新信息，所述标识更新信息用于指示所述更新后的所述第一通信装置的标识信息。
  24. 如权利要求15-23中任一项所述的第一通信装置，其特征在于，所述第一通信装置的非接入层为所述第一通信装置的PC5信令层或者车联网V2X层，所述第一通信装置的接入层是所述第一通信装置的无线资源控制RRC层或者侧行链路的无线资源控制SL RRC层。
  25. 一种第二通信装置，其特征在于，包括：
    收发模块，用于接收第一通信装置发送的第一配置信息，其中，所述第一配置信息包括第一侧行链路无线承载的配置信息，所述第一侧行链路无线承载用于承载所述第一通信装置和第二通信装置之间的第一单播业务，所述第一侧行链路为所述第一通信装置和所述第二通信装置之间的无线链路；
    确定模块，用于根据所述第一配置信息确定所述第一侧行链路无线承载的配置信息。
  26. 如权利要求25所述的第二通信装置，其特征在于，所述收发模块用于：
    当所述收发模块运行时，所述第二通信装置的非接入层接收所述第一通信装置的非接入层发送的第一请求消息，以在所述第一通信装置和所述目标通信装置之间建立第一单播连接，其中，所述第一请求消息包括所述第一配置信息，所述第一单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据。
  27. 如权利要求25所述的第二通信装置，其特征在于，所述收发模块用于：
    当所述收发模块运行时，所述第二通信装置的非接入层接收所述第一通信装置的非接入层发送的第二请求消息，以在所述第一通信装置和所述目标通信装置之间建立第二单播连接，其中，所述第二单播连接用于在所述第一通信装置和所述第二通信装置之间传输所述第一单播业务的业务数据；
    当所述收发模块运行时，所述第二通信装置的接入层接收所述第一通信装置的接入层发送的所述第一配置信息。
  28. 如权利要求25-27中任一项所述的第二通信装置，其特征在于，所述收发模块还用于：
    接收所述第一通信装置发送的标识更新信息，所述标识更新信息用于指示所述第一通信装置更新后的标识信息。
  29. 一种通信装置，其特征在于，所述通信装置包括处理器和收发器，所述收发器用于所述通信装置和其他通信装置之间进行信息交互，所述处理器执行程序指令，用以执行 如权利要求1-10中任一项所述的方法或者执行如权利要求11-14中任一项所述的方法。
  30. 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具有用于执行如权利要求1-10或者权利要求11-14中任一项所述的方法的指令。
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