WO2021197269A1 - 一种临近服务的数据传输方法、设备及系统 - Google Patents

一种临近服务的数据传输方法、设备及系统 Download PDF

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Publication number
WO2021197269A1
WO2021197269A1 PCT/CN2021/083601 CN2021083601W WO2021197269A1 WO 2021197269 A1 WO2021197269 A1 WO 2021197269A1 CN 2021083601 W CN2021083601 W CN 2021083601W WO 2021197269 A1 WO2021197269 A1 WO 2021197269A1
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communication link
service
relay
interface
access network
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PCT/CN2021/083601
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English (en)
French (fr)
Inventor
邢玮俊
吴问付
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • 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

Definitions

  • the embodiments of the present application relate to the field of wireless communication technologies, and in particular, to a data transmission method, device, and system of proximity-based services (ProSe).
  • ProSe proximity-based services
  • ProSe communication is more and more widely used in order to improve spectrum utilization, system throughput, and increase network coverage.
  • a communication link can be established directly between the terminal and the terminal, and communicate directly through the communication link, instead of forwarding communication by the access network device.
  • terminal 1 in the ProSe architecture of the fifth-generation mobile communication technology (5th-Generation, 5G) communication system, if terminal 1 and terminal 2 establish a ProSe communication link with a PC5 interface, terminal 1 can communicate with terminal 2 through terminal 2.
  • the Uu interface between the radio access network (radio access network, RAN) establishes a connection and communicates with the RAN and the core network.
  • the terminal 1 may be referred to as a remote user equipment (remote UE), and the terminal 2 may be referred to as a relay user equipment (UE-to-network relay UE).
  • the air interface protocol stack is usually divided into three layers: the physical layer (also called Layer-1, L1 layer), the data link layer (also called Layer-2, L2 layer) and the network layer (also called Layer-3, L3 layer).
  • the L2 layer (that is, the data link layer) can be divided into the following sublayers: medium access control (MAC) layer, wireless link The radio link control (RLC) layer, the packet data convergence protocol (PDCP) layer and the service data adaptation protocol (SDAP) layer.
  • the MAC layer is used to provide logical channels to the RLC layer and to map logical channels to physical channels.
  • the RLC layer is used to provide RLC channels to the PDCP layer and to map the RLC channels and logical channels.
  • the PDCP layer is used to provide a radio bearer (RB) to the SDAP layer and to map RB and RLC channels.
  • the RB includes a signaling radio bearer (SRB) on the control plane and a data radio bearer (DBR) on the user plane.
  • the SDAP layer is used to provide specific quality of service flow (QoS flow) of data packets, and to map the QoS flow to the RB.
  • Data packets transmitted by the same QoS flow are processed using the same QoS parameters, and are represented by a QoS flow identifier (QoS flow identifer, QFI).
  • the QoS parameter is used to indicate one or more of the resource type, priority, delay, packet loss rate, or time window size required for data packet transmission.
  • the application server has data packets to be transmitted, first, the data packets in the protocol data unit (Protocol Data Unit, PDU) are encapsulated once at the NR-SDAP layer of the remote UE . Then, the NR-SDAP layer will map the data packet to the bearer used for physical layer transmission according to the QoS requirements of the data packet. Since the protocol between NR-SDAP and NR-PDCP is the communication protocol used by the Uu interface as specified in TS 38.300, NR-SDAP will map the data packet to the corresponding Uu QoS parameter according to the QoS requirements of the data packet, and It is delivered to the lower layer through the Uu interface. In this way, the remote UE can use the Uu QoS parameters to send data packets to the relay UE through the PC5 link.
  • PDU Protocol Data Unit
  • the present application provides a data transmission method, equipment and system for a proximity service, which can solve the problem that service data transmission cannot be completed due to the mismatch between the QoS parameters of the PC5 interface and the QoS parameters of the Uu interface.
  • a data transmission method for a proximity service is provided, which is applied to a relay UE.
  • the method includes: the relay UE obtains a correspondence between a first communication link and a second communication link; wherein, the first communication The link is used to transmit the data of the first service between the relay UE and the access network device; the second communication link is used to transmit the data of the first service between the relay UE and the remote UE; the relay UE is based on The obtained corresponding relationship is used to transmit the data of the first service of the remote UE.
  • the relay UE obtains the correspondence between the first communication link (such as DRB) and the second communication link (such as SLRB), so that the relay UE can communicate with each other according to the correspondence.
  • the service data of the first service is transmitted between the remote UE and the relay UE through the first communication link with the access network device and the second communication link between the remote UE and the relay UE.
  • the foregoing relay UE acquiring the correspondence between the first communication link and the second communication link includes: the relay UE receives the identification information of the first communication link from the access network device And the identification information of the second communication link; the relay UE establishes the connection between the first communication link and the second communication link according to the received identification information of the first communication link and the identification information of the second communication link.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the relay UE establishes the first communication link and the second communication link according to the first communication link and the second communication link determined by the access network device. Correspondence between the second communication links.
  • the foregoing relay UE acquiring the corresponding relationship between the first communication link and the second communication link includes: the relay UE receives the foregoing corresponding relationship from an access network device.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the establishment of the first communication link and the second communication link according to the determined first communication link and the second communication link The corresponding relationship.
  • the foregoing relay UE acquiring the correspondence between the first communication link and the second communication link includes: the relay UE receives the first correspondence from the access network device; the first The correspondence is the correspondence between the first communication link and at least two PC5 interface communication links of the remote UE; the relay UE determines the second communication link from the at least two PC5 interface communication links described above; relay The UE establishes a correspondence between the first communication link and the second communication link.
  • This solution supports the access network device to determine the first communication link and at least two candidate PC5 interface communication links of the remote UE corresponding to the first communication link, and the relay UE further communicates from the at least two candidate PC5 interfaces The second communication link is finally determined in the link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the above method further includes: the relay UE receives the PC5 quality of service QoS parameter of the first service from the access network device; the relay UE receives the second correspondence from the access network device; the second The correspondence is the correspondence between the at least two PC5 interface communication links and the PC5 QoS parameters; the relay UE determines the second communication link from the at least two PC5 interface communication links, including: the relay UE determines the second communication link according to the The PC5 QoS parameters of the first service, the first correspondence and the second correspondence, determine the second communication link from the above-mentioned at least two PC5 interface communication links.
  • This solution supports the determination of the first communication link and at least two candidate PC5 interface communication links of the remote UE corresponding to the first communication link by the access network device, and the relay UE according to the PC5 QoS parameters of the first service,
  • the correspondence between the first communication link and the at least two PC5 interface communication links of the remote UE and the correspondence between the at least two PC5 interface communication links and the PC5 QoS parameters are further communicated from at least two candidate PC5 interfaces
  • the final second communication link is determined in the link, so as to establish the correspondence between the first communication link and the second communication link.
  • the PC5 QoS parameters of the first service above include one or more of the following parameters: the resource type of the PC5 interface, the scheduling priority of the PC5 interface, the delay of the PC5 interface, and the delay of the PC5 interface.
  • the requirements of the service in this application on interface parameters include but are not limited to at least one of resource type, scheduling priority, time delay, packet loss rate, maximum burst flow, or time window size.
  • the foregoing method further includes: the relay UE receives the PC5 QoS parameters of the first service; the foregoing relay UE acquiring the correspondence between the first communication link and the second communication link includes: The relay UE receives the identification information of the first communication link from the access network device; the relay UE determines the second communication link according to the PC5QoS parameters of the first service; the relay UE establishes the first communication link and the Correspondence between the second communication links.
  • This solution supports the access network device to determine the first communication link, and the relay UE determines the second communication link according to the PC5 QoS parameters of the first service, thereby establishing the first communication link and the second communication link. Correspondence between.
  • the foregoing relay UE acquiring the correspondence between the first communication link and the second communication link includes: the relay UE receives configuration information of the second communication link from the remote UE; Then the UE receives the identification information of the first communication link from the access network device; the relay UE establishes the first communication link and the second communication link according to the configuration information of the second communication link and the identification information of the first communication link Correspondence between roads.
  • This solution supports that the access network device determines the first communication link, the remote UE determines the second communication link, and finally the relay UE establishes the correspondence between the first communication link and the second communication link.
  • the foregoing first communication link is a data radio bearer DRB
  • the second communication link is a side link radio bearer SLRB.
  • a data transmission method of proximity service is provided, which is applied to an access network device.
  • the method includes: the access network device receives Uu QoS requirement information of the first service; Demand information, determining the data of the first service to be transmitted through the first communication link between the access network device and the relay UE; the access network device according to the corresponding relationship between the first Uu QoS parameter and the first PC5 QoS parameter, and The Uu QoS requirement information of the first service determines the second communication link; the second communication link is used to transmit the data of the first service between the relay UE and the remote UE; the access network equipment sends the relay user equipment UE Send communication link information, the communication link information is used to characterize or establish the correspondence between the first communication link and the second communication link; wherein, the above-mentioned first Uu QoS parameter is used to relay UE and access The Uu interface between the network devices transmits the data of the first service, and the first PC5 QoS parameter is used to transmit the data of the first service through
  • the access network device determines the first communication link for transmitting the data of the first service between the access network device and the relay UE according to the Uu QoS requirement information of the first service, And according to the corresponding relationship between the U QoS parameters of the first service and the PC5 QoS parameters, combined with the U QoS requirement information of the first service to determine the second communication link used to transmit the data of the first service between the remote UE and the relay UE .
  • the problem that the first communication link (such as DRB) and the second communication link (such as SLRB) cannot be completed due to the mismatch of the conventional technology can be solved.
  • the above-mentioned communication link information includes the correspondence between the first communication link and the second communication link; or, the communication link information includes the identification information of the first communication link and the second communication link. Identification information of the communication link.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the relay UE establishes the first communication link and the second communication link according to the first communication link and the second communication link determined by the access network device. Correspondence between the second communication links.
  • the access network device determines the first communication link and the second communication link, and establishes the communication link between the first communication link and the second communication link according to the determined first communication link and the second communication link. Correspondence.
  • the above method further includes: the access network device receives the Uu QoS requirement information of the second service; the access network device determines to pass the first communication link according to the Uu QoS requirement information of the second service. Transmit the data of the second service; the access network device determines the third communication link according to the correspondence between the second Uu QoS parameter and the second PC5 QoS parameter, and the Uu QoS requirement information of the second service; the third communication link Used to relay the data of the second service between the UE and the remote UE; wherein, the above-mentioned communication link information includes the first communication link, and the correspondence between the communication links of at least two PC5 interfaces of the remote UE, and the above The at least two PC5 interface communication links include a second communication link and a third communication link; the second Uu QoS parameter is used to transmit the data of the second service through the Uu interface between the relay UE and the access network device.
  • the second PC5 QoS parameter is used to transmit the data of the second service through the PC5 interface between the relay UE and the remote UE.
  • This solution supports the determination by the access network equipment of the first communication link and the two candidate PC5 interface communication links corresponding to different services of the remote UE corresponding to the first communication link, and the relay UE further obtains information from the two candidate PC5 interface communication links.
  • the second communication link is finally determined in the interface communication link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the above method further includes: the access network device receives the Uu QoS requirement information of the third service; the access network device determines the transmission through the first communication link according to the Uu QoS requirement information of the third service The data of the third service; the access network equipment determines the connection between the relay UE and the remote UE according to the correspondence between the third Uu QoS parameter and the third PC5 QoS parameter, and the Uu QoS requirement information of the third service.
  • the fourth communication link for transmitting the data of the third service; wherein, the above-mentioned at least two PC5 interface communication links also include a fourth communication link; the third Uu QoS parameter is used to relay the UE to the access network
  • the Uu interface between the devices transmits the data of the third service
  • the third PC5 QoS parameter is used to transmit the data of the third service through the PC5 interface between the relay UE and the remote UE.
  • This solution supports the determination by the access network device of the first communication link and at least two candidate PC5 interface communication links corresponding to different services of the remote UE corresponding to the first communication link, and the relay UE further obtains information from the at least two candidate PC5 interface communication links.
  • the second communication link is finally determined in the communication link of the PC5 interface, so as to establish the correspondence between the first communication link and the second communication link.
  • the above method further includes: the access network device receives the Uu QoS requirement information of the fourth service of the second remote UE; the access network device determines to pass the Uu QoS requirement information of the fourth service according to the Uu QoS requirement information of the fourth service.
  • a communication link transmits the data of the fourth service; the access network equipment determines the corresponding relationship between the fourth Uu QoS parameter and the fourth PC5 QoS parameter, and the Uu QoS requirement information of the fourth service, to determine for the relay UE and The fifth communication link for transmitting the data of the fourth service between the second remote UE; the access network device sends the first communication link to the relay UE and the fifth communication link of the second remote UE.
  • the fourth Uu QoS parameter is used to transmit data of the fourth service through the Uu interface between the relay UE and the access network device, and the fourth PC5 QoS parameter is used to communicate with the second remote UE through the relay UE.
  • the PC5 interface between them transmits the data of the fourth service; the communication link information also includes the identification information of the first remote UE and the identification information of the second remote UE.
  • This solution supports the determination of the first communication link and the two PC5 interface communication links corresponding to different services of different remote UEs corresponding to the first communication link by the access network device, and the relay UE further obtains information from the above two PC5 interfaces.
  • the second communication link is finally determined in the interface communication link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the Uu QoS requirement information of the first service includes one or more of the following: the resource type of the Uu interface, the scheduling priority of the Uu interface, the delay of the Uu interface, and the packet loss of the Uu interface Rate, the maximum burst traffic of the Uu interface or the time window size of the Uu interface; among them, the resource type of the Uu interface includes one or more of the following: guaranteed bit rate GBR type, non-guaranteed bit rate Non-GBR type and delay critical Guaranteed bit rate Delay-critical GBR type.
  • the requirements of the service in this application on interface parameters include but are not limited to at least one of resource type, scheduling priority, time delay, packet loss rate, maximum burst flow, or time window size.
  • the above-mentioned access network device receives the Uu QoS requirement information of the first service from the SMF network element of the session management function through the protocol data unit PDU session.
  • the above method further includes: the access network device receives the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter from the PCF network element.
  • the access network device receives the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter from the PCF network element.
  • a relay UE in a third aspect, includes: a transceiving unit configured to obtain a corresponding relationship between a first communication link and a second communication link; wherein the first communication link is used for The data of the first service is transmitted between the relay UE and the access network device; the second communication link is used to transmit the data of the first service between the relay UE and the remote UE; the processing unit is used to obtain the corresponding The relationship is to transmit the data of the first service of the remote UE.
  • the relay UE obtains the correspondence between the first communication link (such as DRB) and the second communication link (such as SLRB), so that the relay UE can be used for the corresponding relationship according to the corresponding relationship.
  • the service data of the first service is transmitted between the remote UE and the relay UE with the access network equipment.
  • the foregoing transceiver unit is further configured to receive identification information of the first communication link and identification information of the second communication link from the access network device; the foregoing processing unit obtains the first communication link and
  • the correspondence between the second communication links includes: the processing unit establishes the first communication link and the second communication link according to the identification information of the first communication link and the identification information of the second communication link received by the transceiver unit Correspondence between roads.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the relay UE establishes the first communication link and the second communication link according to the first communication link and the second communication link determined by the access network device. Correspondence between the second communication links.
  • the processing unit acquiring the corresponding relationship between the first communication link and the second communication link includes: the processing unit receives the corresponding relationship from the access network device through the transceiver unit.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the establishment of the first communication link and the second communication link according to the determined first communication link and the second communication link The corresponding relationship.
  • the above transceiver unit is further configured to receive a first correspondence from the access network device; the first correspondence is the first communication link and at least two PC5 interface communication links of the remote UE.
  • the foregoing processing unit obtains the corresponding relationship between the first communication link and the second communication link, including: the processing unit determines the second communication link from the at least two PC5 interface communication links; And, the processing unit establishes a correspondence between the first communication link and the second communication link.
  • This solution supports the access network device to determine the first communication link and at least two candidate PC5 interface communication links of the remote UE corresponding to the first communication link, and the relay UE further communicates from the at least two candidate PC5 interfaces The second communication link is finally determined in the link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the foregoing transceiver unit is further configured to receive the PC5 quality of service QoS parameter of the first service from the access network device; receive the second correspondence from the access network device; the second correspondence is the foregoing Correspondence between at least two PC5 interface communication links and PC5 QoS parameters; the above-mentioned processing unit determines the second communication link from the above-mentioned at least two PC5 interface communication links, including: the processing unit according to the PC5QoS of the first service The parameters, the first correspondence and the second correspondence, determine the second communication link from the aforementioned at least two PC5 interface communication links.
  • This solution supports the determination of the first communication link and at least two candidate PC5 interface communication links of the remote UE corresponding to the first communication link by the access network device, and the relay UE according to the PC5 QoS parameters of the first service,
  • the correspondence between the first communication link and the at least two PC5 interface communication links of the remote UE and the correspondence between the at least two PC5 interface communication links and the PC5 QoS parameters are further communicated from at least two candidate PC5 interfaces
  • the final second communication link is determined in the link, so as to establish the correspondence between the first communication link and the second communication link.
  • the PC5 QoS parameters of the first service above include one or more of the following parameters: the resource type of the PC5 interface, the scheduling priority of the PC5 interface, the delay of the PC5 interface, and the delay of the PC5 interface.
  • the requirements of the service in this application on interface parameters include but are not limited to at least one of resource type, scheduling priority, time delay, packet loss rate, maximum burst flow, or time window size.
  • the foregoing transceiver unit is further configured to receive the PC5 QoS parameters of the first service; and, receive the identification information of the first communication link from the access network device; and the foregoing processing unit obtains the first
  • the correspondence between the communication link and the second communication link includes: the processing unit determines the second communication link according to the PC5 QoS parameters of the first service; and the processing unit establishes the first communication link and the second communication link Correspondence between communication links.
  • This solution supports the access network device to determine the first communication link, and the relay UE determines the second communication link according to the PC5QoS parameters of the first service, thereby establishing a connection between the first communication link and the second communication link The corresponding relationship.
  • the foregoing transceiver unit is further configured to receive configuration information of the second communication link from the remote UE; receive identification information of the first communication link from the access network device; and the foregoing processing unit obtains the first communication link.
  • the correspondence between the communication link and the second communication link includes: the processing unit establishes the first communication link and the second communication link according to the configuration information of the second communication link and the identification information of the first communication link Correspondence between.
  • the foregoing first communication link is a data radio bearer DRB
  • the second communication link is a side link radio bearer SLRB.
  • an access network device includes: a transceiver unit, configured to receive Uu QoS requirement information of a first service; and a processing unit, configured to determine the Uu QoS requirement information of the first service
  • the data of the first service is transmitted through the first communication link between the access network device and the relay UE; and according to the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter, and the Uu QoS of the first service
  • the demand information is used to determine the second communication link; the second communication link is used to transmit the data of the first service between the relay UE and the remote UE; the above transceiver unit is also used to send the communication link to the relay user equipment UE Path information, the communication link information is used to characterize or establish the corresponding relationship between the first communication link and the second communication link; wherein, the above-mentioned first Uu QoS parameter is used to communicate between the UE and the access network equipment through the relay The Uu interface between them transmits the data of
  • the access network device determines the first communication link for transmitting the data of the first service between the access network device and the relay UE according to the Uu QoS requirement information of the first service, And according to the corresponding relationship between the U QoS parameters of the first service and the PC5 QoS parameters, combined with the U QoS requirement information of the first service to determine the second communication link used to transmit the data of the first service between the remote UE and the relay UE .
  • the problem that the first communication link (such as DRB) and the second communication link (such as SLRB) cannot be completed due to the mismatch of the conventional technology can be solved.
  • the above-mentioned communication link information includes the correspondence between the first communication link and the second communication link; or, the communication link information includes the identification information of the first communication link and the second communication link. Identification information of the communication link.
  • This solution supports the determination of the first communication link and the second communication link by the access network device, and the relay UE establishes the first communication link and the second communication link according to the first communication link and the second communication link determined by the access network device. Correspondence between the second communication links.
  • the access network device determines the first communication link and the second communication link, and establishes the communication link between the first communication link and the second communication link according to the determined first communication link and the second communication link. Correspondence.
  • the above-mentioned transceiver unit is further configured to receive the Uu QoS requirement information of the second service; the above-mentioned processing unit is also configured to determine the Uu QoS requirement information of the above-mentioned second service through the first communication link Transmission of the data of the second service; and, according to the corresponding relationship between the second Uu QoS parameter and the second PC5 QoS parameter, and the Uu QoS requirement information of the second service, determine the third communication link; the third communication link uses The data of the second service is transmitted between the relay UE and the remote UE; wherein, the above-mentioned communication link information includes the first communication link, and the correspondence between the communication links of at least two PC5 interfaces of the remote UE, and the above-mentioned at least The two PC5 interface communication links include a second communication link and a third communication link; the second Uu QoS parameter is used to transmit the data of the second service through the Uu interface between the relay UE and the access
  • This solution supports the determination by the access network equipment of the first communication link and the two candidate PC5 interface communication links corresponding to different services of the remote UE corresponding to the first communication link, and the relay UE further obtains information from the two candidate PC5 interface communication links.
  • the second communication link is finally determined in the interface communication link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the above-mentioned transceiver unit is also used to receive the Uu QoS requirement information of the third service; the above-mentioned processing unit is also used to determine to pass the first communication link according to the Uu QoS requirement information of the third service Transmit the data of the third service; and, according to the correspondence between the third Uu QoS parameter and the third PC5 QoS parameter, and the Uu QoS requirement information of the third service, determine to be used between the relay UE and the remote UE
  • the fourth communication link for transmitting the data of the third service; wherein, the above-mentioned at least two PC5 interface communication links also include a fourth communication link; the third Uu QoS parameter is used to relay the UE to the access network device The Uu interface between them transmits the data of the third service, and the third PC5 QoS parameter is used to transmit the data of the third service through the PC5 interface between the relay UE and the remote UE.
  • This solution supports the determination by the access network device of the first communication link and at least two candidate PC5 interface communication links corresponding to different services of the remote UE corresponding to the first communication link, and the relay UE further obtains information from the at least two candidate PC5 interface communication links.
  • the second communication link is finally determined in the communication link of the PC5 interface, so as to establish the correspondence between the first communication link and the second communication link.
  • the above-mentioned transceiver unit is further configured to receive the Uu QoS requirement information of the fourth service of the second remote UE; the above-mentioned processing unit is also configured to determine to pass the Uu QoS requirement information of the fourth service
  • the first communication link transmits the data of the fourth service; and, according to the corresponding relationship between the fourth Uu QoS parameter and the fourth PC5 QoS parameter, and the Uu QoS requirement information of the fourth service, it is determined for the relay UE to communicate with each other.
  • the PC5 interface between them transmits the data of the fourth service;
  • the communication link information also includes the identification information of the first remote UE and the identification information of the second remote UE.
  • This solution supports the determination of the first communication link and the two PC5 interface communication links corresponding to different services of different remote UEs corresponding to the first communication link by the access network device, and the relay UE further obtains information from the above two PC5 interfaces.
  • the second communication link is finally determined in the interface communication link, thereby establishing the correspondence between the first communication link and the second communication link.
  • the Uu QoS requirement information of the first service includes one or more of the following: the resource type of the Uu interface, the scheduling priority of the Uu interface, the delay of the Uu interface, and the packet loss of the Uu interface Rate, the maximum burst traffic of the Uu interface or the time window size of the Uu interface; among them, the resource type of the Uu interface includes one or more of the following: guaranteed bit rate GBR type, non-guaranteed bit rate Non-GBR type and delay critical Guaranteed bit rate Delay-critical GBR type.
  • the requirements of the service in this application on interface parameters include but are not limited to at least one of resource type, scheduling priority, time delay, packet loss rate, maximum burst flow, or time window size.
  • the foregoing transceiver unit is further configured to receive the Uu QoS requirement information of the first service from the SMF network element of the session management function through the protocol data unit PDU session.
  • the foregoing transceiver unit is further configured to receive the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter from the PCF network element.
  • This solution supports the management of the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter by the PCF network element.
  • a relay UE in a fifth aspect, includes: a memory, configured to store a computer program; The data transmission method of the service.
  • an access network device in a sixth aspect, includes: a memory, configured to store a computer program; a processor, configured to execute the foregoing computer program to implement any one of the possible implementation manners of the second aspect The data transmission method of the proximity service.
  • a communication system in a seventh aspect, includes a relay UE in any possible implementation manner of the third aspect or the fifth aspect; and any possible implementation of the fourth aspect or the sixth aspect Access network equipment in the mode.
  • the communication system further includes one or more of the following: PCF network element, remote UE, SMF network element, or AMF network element.
  • a computer-readable storage medium is provided with computer program code stored on the computer-readable storage medium, and when the computer program code is executed by a processor, any possible implementation such as the first aspect or the second aspect is realized The data transmission method of the proximity service in the mode.
  • a chip system in a ninth aspect, includes a processor and a memory, and computer program codes are stored in the memory; On the one hand, the data transmission method of the proximity service in any possible implementation manner.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • a computer program product which when running on a computer, enables the implementation of the proximity service data transmission method in any possible implementation manner of the first aspect or the second aspect.
  • Figure 1 is an example diagram of the ProSe architecture of a 5G communication system
  • Figure 2 is a schematic diagram of data processing at the data link layer
  • Figure 3 is a structure diagram of a user plane protocol stack of a relay UE data link layer
  • Figure 4 is a diagram of a communication network architecture
  • FIG. 5 is a schematic diagram of the hardware structure of a remote UE or a relay UE according to an embodiment of the application;
  • FIG. 6 is a schematic diagram of the hardware structure of a network device provided by an embodiment of the application.
  • FIG. 7 is a flowchart of a data transmission method for a proximity service provided by an embodiment of this application.
  • FIG. 8 is an interactive diagram 1 of a data transmission method of a proximity service provided by an embodiment of this application.
  • FIG. 9 is the second interaction diagram of the data transmission method of the proximity service provided by the embodiment of this application.
  • FIG. 10 is the third interaction diagram of the data transmission method of the proximity service provided by the embodiment of this application.
  • FIG. 11 is a fourth interaction diagram of a data transmission method of a proximity service provided by an embodiment of this application.
  • FIG. 12 is the fifth interaction diagram of the data transmission method of the proximity service provided by the embodiment of this application.
  • FIG. 13 is a sixth interaction diagram of a data transmission method of a proximity service provided by an embodiment of this application.
  • FIG. 14 is a structural block diagram of a UE provided by an embodiment of this application.
  • FIG. 15 is a structural block diagram of a network device provided by an embodiment of this application.
  • NB-IoT narrowband-internet of things
  • WLAN wireless local access network
  • LTE long term evolution
  • 5G fifth generation of mobile networks
  • 6G device-to-device
  • D2D device-to-device
  • Figure 4 shows a diagram of a communication network architecture.
  • Figure 4 takes the network service architecture of the 5G system as an example to show the interaction relationship between network functions and entities and corresponding interfaces.
  • the network architecture is a service-based architecture (SBA).
  • the network functions and entities included in the 5G system mainly include: UE, access network (AN) or radio access network (RAN), user plane function (UPF) ), data network (DN), access and mobility management function (AMF), session management function (SMF), authentication server function (AUSF), policy Control function (policy control function, PCF), application function (application function, AF), network slice selection function (network slice selection function, NSSF), unified data management (unified data management, UDM), network exposure function (network exposure function) , NEF) and network storage function (network repository function, NRF).
  • UE access network
  • RAN radio access network
  • UPF user plane function
  • DN data network
  • AMF access and mobility management function
  • SMF session management function
  • AUSF authentication server function
  • policy control function policy control function
  • PCF policy control function
  • application function application function
  • AF network slice selection function
  • NSSF network slice selection function
  • UDM network exposure function
  • NEF network exposure function
  • NRF network storage function
  • a relay device is a device that can provide a remote UE with access to a cellular network, and it can be a relay station or a device such as a UE.
  • the UE acts as a relay device for the remote UE, the UE must support PC5 interface communication.
  • the relay device may be called a "relay UE", which indicates that the relay device is located within the coverage of the mobile network.
  • the relay device can normally access the access network of the 5G system.
  • the remote UE is connected to the access network device and the core network device through the relay UE.
  • the interface between the remote UE and the relay UE is the PC5 interface
  • the interface between the relay UE and the AN/RAN is the Uu interface
  • the interface point between the remote UE/relay UE and the AMF is the N1 interface
  • AN/ The interface between RAN and AMF is N2 interface
  • the interface between AN/RAN and UPF is N3 interface
  • the interface between SMF and UPF is N4 interface
  • the interface between UPF is DN is N6 interface
  • Namf is AMF display Nsmf is the service-based interface displayed by SMF
  • Nausf is the service-based interface displayed by AUSF
  • Nnssf is the service-based interface displayed by NSSF
  • Nnef is the service-based interface displayed by NEF
  • Nnrf is displayed by NRF
  • Npcf is a service-based interface displayed by PCF
  • Nudm is a
  • AN/RAN can be composed of AN/RAN equipment.
  • AN/RAN equipment can be various forms of base stations, such as: macro base stations, micro base stations (also called “small stations"), distributed unit-control unit (DU-CU), etc., among which, DU -CU is a device that is deployed in a wireless access network and can communicate with UE wirelessly.
  • the aforementioned base station may also be a wireless controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted device, wearable device, or a public land mobile network (public land mobile network) that will evolve in the future.
  • CDN cloud radio access network
  • the AN/RAN equipment may also be a broadband network service gateway (broadband network gateway, BNG), aggregation switch, non-3GPP access equipment, and so on.
  • BNG broadband network gateway
  • AN/RAN equipment is mainly responsible for radio resource management on the air interface side, uplink and downlink data classification, quality of service (QoS) management, data compression and encryption, and complete signaling processing with control plane network elements or with user plane function network elements Complete functions such as data forwarding.
  • QoS quality of service
  • the embodiment of this application does not limit the specific form and structure of the AN/RAN device.
  • the names of devices with base station functions may be different.
  • the base station can be an evolved universal terrestrial radio access network (E-UTRAN) device in LTE, such as an evolved NodeB (evolutional NodeB, eNB or e-NodeB), or it can be 5G The next generation radio access network (NG-RAN) equipment (such as gNB) in the system, etc.
  • E-UTRAN evolved universal terrestrial radio access network
  • NG-RAN next generation radio access network
  • AMF Mainly responsible for the processing of control plane messages, such as: access control, mobility management, lawful interception, access authentication/authorization, etc.
  • the functions of AMF include: 1) processing the access network control plane; 2) processing NAS messages, responsible for NAS encryption and integrity protection; 3) registration management; 4) connection management; 5) accessibility management; 6) Mobility management; 7) Legal information interception; 8) Provide session management messages between UE and SMF; 9) Transparent transmission of session management (SM) messages for routing, similar to transparent transmission proxy; 10) Access authentication; 11) Access authorization; 12) Forward SMS messages (short messages) between the UE and SMSF; 13) Interact with AUSF and UE to obtain the UE authentication intermediate key; 14) Calculation A specific key to access the network.
  • SM session management
  • SMF Mainly used for session management, UE's Internet Protocol (IP) address allocation and management, selection of end points that can manage user plane functions, policy control and charging function interfaces, downlink data notifications, etc.
  • the functions of SMF include: 1) session management, session establishment, modification and release, including channel maintenance between UPF and AN nodes; 2) UE IP address allocation and management; 3) selection and control of user plane functions; 4 ) Configure correct service routing on UPF; 5) Implementation of policy control function; 6) Control part of policy execution and QoS; 7) Legal interception; 8) Process session management part in NAS message; 9) Downlink data indication; 10) Initiate specific session management information of the access network (routed via AMF); 11) Determine the mode of continuity with the service in the session; 12) Roaming function.
  • IP Internet Protocol
  • PCF Mainly used to provide UE policy rules, access management (AM) policy rules, and SM policy rules related parameters to UE, AMF or SMF respectively, manage user subscription information, and connect to UDM to access policy decisions related Subscribe to user information, etc.
  • PCF generally makes strategic decisions based on contract information and so on.
  • AF used to provide services, mainly used for: 1) application impact on business routing; 2) exposure of network access capabilities; 3) interaction with policy framework for policy control.
  • Remote UE/Relay UE It can be desktop devices, laptop devices, handheld devices, wearable devices, smart home devices, computing devices, and vehicle-mounted devices with wireless connection functions.
  • the remote UE/relay UE may also be a wireless device in narrowband (NB) technology.
  • NB narrowband
  • remote UE/relay UE can also refer to access terminal, user unit, user station, mobile station, mobile station, relay station, remote station, remote terminal, mobile device, user terminal, terminal, Wireless communication equipment, user agent or user device.
  • the terminal equipment can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN or terminal devices in the future Internet of Vehicles, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the remote UE/relay UE can also be the terminal equipment in the IoT system.
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to connect objects to the network through communication technology to achieve human-machine interconnection. An intelligent network of interconnected things. IOT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, NB technology. This application does not limit the specific type and structure of the remote UE/relay UE.
  • FIG. 5 shows a schematic diagram of the hardware structure of a UE.
  • the UE may be a relay UE or a remote UE.
  • the UE may specifically include: a processor 501, a radio frequency circuit 502, a memory 503, a touch screen 504, a Bluetooth device 505, one or more sensors 506, a Wi-Fi device 507, a positioning device 508, an audio circuit 509, Peripheral interface 510, power supply device 511, fingerprint collection device 512, speaker 513, microphone 514 and other components. These components can communicate through one or more communication buses or signal lines (not shown in Figure 5).
  • the hardware structure shown in FIG. 5 does not constitute a limitation on the relay UE or the remote UE. Both the relay UE or the remote UE may include more or less components than those shown in the figure, or a combination. Certain components, or different component arrangements.
  • each component of the relay UE will be specifically introduced with reference to FIG. 5:
  • the processor 501 may be the control center of the relay UE. It uses various interfaces and lines to connect to other parts of the relay UE, and runs or executes a computer program stored in the memory 503, for example, an application client program (hereinafter referred to as App) to perform various functions of the relay UE.
  • App an application client program
  • the processor 501 may be a general-purpose CPU, a microprocessor, a specific ASIC, or one or more integrated circuits used to control program execution of the solution of the present application, and the processor 501 may include one or more CPUs;
  • the processor 501 may be a Kirin chip.
  • the radio frequency circuit 502 can be used for receiving and transmitting wireless signals.
  • the radio frequency circuit 502 can receive the downlink data of the base station and send it to the processor 501 for processing; in addition, the radio frequency circuit 502 can also send the uplink data to the base station.
  • the radio frequency circuit 502 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency circuit 502 can also communicate with other devices through wireless communication.
  • the wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communications, General Packet Radio Service, Code Division Multiple Access, Wideband Code Division Multiple Access, Long Term Evolution, Email, Short Message Service, etc.
  • the memory 503 is used to store computer programs and can also be used to store data.
  • the memory 503 can be a read-only memory (ROM) or a random access memory (RAM), or an electrically erasable programmable read-only memory (EEPROM) , Compact disc (read-only memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices , Or any other medium that can be used to carry or store program code and that can be accessed by a computer, but is not limited to this.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM Compact disc
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • magnetic disk storage media or other magnetic storage devices Or any other medium that can be used to carry or store program code and
  • the processor 501 can execute various functions of the relay UE and data processing by running a computer program stored in the memory 503.
  • the memory 503 may include a program storage area and a data storage area.
  • the storage program area can store the operating system, at least one application program (such as sound playback function, image playback function, etc.) required by the function;
  • the storage data area can store data created according to the use of the relay UE (such as audio data, Phone book, etc.).
  • the memory 503 may store a computer program for implementing modular functions, and the processor 501 controls the execution.
  • the processor 501 is configured to execute a computer program stored in the memory 503, so as to implement the method provided in the following embodiments of the present application.
  • the memory 503 may include a high-speed random access memory, and may also include a non-volatile memory, such as a magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the memory 503 can store various operating systems, for example, an iOS operating system, an Android operating system, and so on.
  • the relay UE may also include at least one or more sensors 506, such as light sensors, motion sensors, and other sensors.
  • the light sensor can include an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display of the touch screen 504 according to the brightness of the ambient light.
  • the proximity sensor can turn off the display when the relay UE moves to the ear. power supply.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when it is stationary.
  • the audio circuit 509, the speaker 513, and the microphone 514 can provide an audio interface between the user and the relay UE.
  • the audio circuit 509 can transmit the electrical signal converted from the received audio data to the speaker 513, and the speaker 513 converts it into a sound signal for output; on the other hand, the microphone 514 converts the collected sound signal into an electrical signal, which is then output by the audio circuit 509 After being received, it is converted into audio data, and then the audio data is output to the radio frequency circuit 502 to be sent to, for example, another UE, or the audio data is output to the memory 503 for further processing.
  • the relay UE may also include a camera (front camera and/or rear camera), a flash, a micro-projection device, a near-field communication (NFC) device, etc., which will not be described here. Go into details.
  • the hardware modules included in the relay UE shown in FIG. 5 are only described as examples, and do not limit the application.
  • the remote UE and the relay UE provided in the embodiments of the present application may also include other hardware modules that have an interactive relationship with the hardware modules illustrated in the figure, which are not specifically limited here.
  • the AN/RAN device in this application may be a base station.
  • the base station may be an Ng-eNB, a gNB, or a transmission/reception point (TRP). It can also be a base station defined by 3GPP. For example, eNB or e-NodeB, etc.
  • the eNB when the eNB accesses the NR core network or next generation core network (NGC) or 5G core network (5th generation core network, 5GC), the eNB may also be referred to as eLTE eNB.
  • the eLTE eNB is an evolved LTE base station equipment based on the eNB, and can be directly connected to the 5G CN.
  • the eLTE eNB also belongs to the base station equipment in the NR.
  • the AN/RAN device may also be a wireless terminal (WT).
  • WT wireless terminal
  • AP access point
  • AC access controller
  • relay equipment in-vehicle equipment
  • smart wearable equipment etc. This application does not limit the type of AN/RAN equipment.
  • FIG. 6 shows a schematic diagram of the hardware structure of a network device.
  • the network device 600 may be the AN/RAN device in the radio access network shown in FIG. 1 or FIG. 3, or the AN/RAN device in the AN/RAN shown in FIG. 4, or it may be the AN/RAN device shown in FIG. Core network elements such as AMF, SMF or PCF.
  • the network device 600 may include a processor 601, a communication line 602, a memory 603, and at least one communication interface (FIG. 6 is only an example, taking the communication interface 604 as an example for illustration).
  • the processor 601 may include one or more processors, where the processor may be a CPU, a microprocessor, a specific ASIC, or other integrated circuits, and is not limited.
  • the communication line 602 may include a path for transmitting information between the aforementioned components.
  • the communication interface 604 is used to communicate with other devices or a communication network.
  • the memory 603 can be ROM or RAM, or EEPROM, CD-ROM, or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, Or it can be used to carry or store the desired program code in the form of instructions or data structure and any other medium that can be accessed by the computer, but is not limited to this.
  • the memory may exist independently, and is connected to the processor through the communication line 602.
  • the memory can also be integrated with the processor.
  • the memory 603 is used to store a computer program.
  • the processor 601 is configured to execute a computer program stored in the memory 603, so as to implement a related network element method provided in any of the following method embodiments of the present application.
  • the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 6.
  • FIG. 6 is only used as an example of a network device, and does not limit the specific structure of the network device.
  • the network device may also include other functional modules.
  • This embodiment of the application provides a data transmission method for proximity services.
  • the method implements QoS demand management and control based on QoS flows, and implements the mapping from Uu QoS parameters to PC5 QoS parameters.
  • Uu interface communication link such as DRB
  • PC5 interface communication link such as SLRB
  • FIG. 7 shows a data transmission method of a proximity service provided by an embodiment of the present application.
  • the method may be based on the foregoing architecture, and the details are as follows.
  • the relay UE obtains the correspondence between the first communication link and the second communication link.
  • the first communication link may be a Uu interface communication link
  • the Uu interface communication link refers to the communication link established between the relay UE and the access network device through the Uu interface, and can be used to communicate between the relay UE and the access network device.
  • the data of the first service is transmitted between the access network devices.
  • the first communication link may be a data radio bearer (DRB).
  • DRB is used to transmit data of the first service between the relay UE and the access network device.
  • the second communication link may be a PC5 interface communication link, which is used to transmit data of the first service between the relay UE and the remote UE.
  • the second communication link may be a sidelink radio bearer (SLRB).
  • the first service may be a service that the remote UE wants or is about to use for transmission by the relay UE.
  • the first service can be a specific service, such as video service, voice service, CRBT service, text transmission service, etc.; it can also be a certain type of service, such as network slicing service, instant messaging service, life service service, etc. Wait.
  • S701 can be implemented in the following manner.
  • Manner 1 The relay UE directly receives the correspondence between the first communication link and the second communication link from the access network device.
  • the corresponding relationship may be explicit or implicit.
  • the identification information of the first communication link and the identification information of the second communication link are carried in the same message.
  • Manner 2 The relay UE receives the identification information of the first communication link and the identification information of the second communication link from the access network device, and then establishes according to the identification information of the first communication link and the identification information of the second communication link Correspondence between the first communication link and the second communication link.
  • the relay UE may receive configuration information of the first communication link and configuration information of the second communication link from the access network device, where the configuration information of the first communication link includes the identification information of the first communication link, The configuration information of the second communication link includes identification information of the second communication link.
  • the identification information of the first communication link is used to identify the first communication link.
  • the first communication link is the first DRB
  • the identification information of the first communication link is the ID (Identity) of the first DRB.
  • the identification information of the second communication link is used to identify the second communication link.
  • the second communication link is the first SLRB
  • the identification information of the second communication link is the ID of the first SLRB.
  • Manner 3 The relay UE receives the correspondence between the first communication link and at least two PC5 interface communication links from the access network device, and then selects the second communication link from the received at least two PC5 interface communication links. Communication link, and establish the correspondence between the first communication link and the second communication link.
  • the relay UE can select the second communication link from the received at least two PC5 interface communication links according to the situation (such as the occupancy rate) that at least two PC5 interface communication links are occupied; the relay UE can also According to the received correspondence between at least two PC5 interface communication links and PC5 QoS parameters, and the PC5 QoS parameters of the first service.
  • the second communication link is selected from the received at least two PC5 interface communication links.
  • the PC5 QoS parameters of the first service include one or more of the following parameters: the resource type of the PC5 interface, the scheduling priority of the PC5 interface, the delay of the PC5 interface, the packet loss rate of the PC5 interface, and the maximum of the PC5 interface Burst traffic or the time window size of the PC5 interface.
  • the resource types of the PC5 interface include one or more of the following: guaranteed bit rate (GBR) type, non-guaranteed bit rate Non-GBR type, and delay critical guaranteed bit rate (delay critical guaranteed bit rate, Delay).
  • GBR guaranteed bit rate
  • Non-GBR type means that the network does not provide the lowest transmission rate guarantee, that is to say, in the case of network congestion, the business needs to withstand the requirement of lowering the rate.
  • Delay-critical GBR refers to the processing of packet loss for business data that exceeds the specified delay limit, and it is included in the statistics of the packet loss rate; for business data that does not exceed the specified delay limit, it is normally transmitted.
  • the scheduling priority of the Uu interface defines the importance of the service. When system resources are limited, the scheduling priority of the Uu interface determines whether the QoS flow is accepted or rejected by the Uu interface.
  • the delay of the Uu interface defines the requirements of the service on the transmission delay.
  • the packet loss rate of the Uu interface defines the business requirements for the packet loss rate. For example, industrial control delay-sensitive services such as voice, video calls, the Internet of Things, and the Internet of Vehicles usually have high requirements on transmission rates, delays, and packet loss rates.
  • the maximum burst flow rate of the Uu interface defines the service requirement for the maximum burst flow rate.
  • the size of the time window of the Uu interface defines the requirements of the business on the size of the time window.
  • Method 4 The relay UE determines the second communication link according to the received PC5 QoS parameters of the first service, and receives the identification information of the first communication link from the access network device, and then establishes the first communication link and the first communication link. 2. Correspondence between communication links.
  • the relay UE may receive the PC5 QoS parameters of the first service from the remote UE.
  • Mode 5 The relay UE receives the identification information of the first communication link from the access network device, receives the identification information of the second communication link from the remote UE, and then establishes a connection between the first communication link and the second communication link The corresponding relationship.
  • the relay UE may receive the configuration information of the second communication link from the remote UE, and the configuration information of the second communication link includes the identification information of the second communication link.
  • the relay UE transmits data of the first service of the remote UE according to the correspondence between the first communication link and the second communication link.
  • the transmission involved in this application may include sending and/or receiving, and does not limit the direction of transmission.
  • the relay UE may receive the uplink data of the first service from the remote UE and send the uplink data of the first service to the access network device; the relay UE may also receive the uplink data from the access network device. And send the downlink data of the first service to the remote UE.
  • the relay UE uses the first communication link corresponding to the second communication link to transfer the first service to the relay UE.
  • the uplink data of the service is sent to the access network device.
  • the second communication link of the relay UE and the first communication link corresponds to the first service.
  • the downlink data is sent to the remote UE.
  • the relay UE obtains the correspondence between the first communication link (such as DRB) and the second communication link (such as SLRB), so that the relay UE can use the corresponding relationship according to the corresponding relationship.
  • the first communication link is used between the UE and the access network device, and the service data of the first service is transmitted between the remote UE and the relay UE via the second communication link.
  • the foregoing method before obtaining the correspondence between the first communication link and the second communication link, further includes: determining the first communication link and the second communication link. link.
  • the first communication link and the second communication link can be determined in the following three ways:
  • the access network device determines the first communication link and the second communication link.
  • the access network device may determine to transmit the data of the first service through the first communication link between the access network device and the relay UE according to the Uu QoS requirement information of the first service, and according to the first communication link
  • the corresponding relationship between the U QoS parameter and the first PC5 QoS parameter, and the U QoS requirement information of the first service determine the second communication link.
  • the Uu QoS requirement information of the first service refers to the QoS configuration requirement of the first service on the Uu interface.
  • the Uu QoS requirement information of the first service includes at least one or more of the following parameters of the Uu interface of the first service: the resource type of the Uu interface, the scheduling priority of the Uu interface, the delay of the Uu interface, and the loss of the Uu interface.
  • the resource type of the Uu interface may include one or more of the following: GBR type, Non-GBR type, and Delay-critical GBR type.
  • the Uu QoS requirement information of the first service in the embodiment of the present application may be received by the access network device from the SMF network element through the PDU session.
  • the first Uu QoS parameter is used to transmit the data of the first service through the Uu interface between the relay UE and the access network device;
  • the first PC5 QoS parameter is used to transmit the first service data through the PC5 interface between the relay UE and the remote UE.
  • Business data is used to transmit the data of the first service through the Uu interface between the relay UE and the remote UE.
  • the access network device can select the resource type, scheduling priority, and timing that best meets the Uu interface of the first service from the multiple Uu interface communication links that can be used by the access network device.
  • a Uu interface communication link (such as the first communication link) that requires one or more QoS parameters such as delay, packet loss rate, maximum burst flow, or time window size, is used for communication between the access network device and the relay UE. Transmission of business data of the first business.
  • the access network device may determine the PC5 QoS parameter (such as the first Uu QoS parameter) corresponding to the Uu QoS parameter (such as the first Uu QoS parameter) that can be satisfied by the first communication link.
  • PC5 QoS parameters so as to select one PC5 interface communication link (such as the second communication link) that can meet the first PC5 QoS parameters from the multiple PC5 interface communication links that can be used by the relay UE. It should be noted that, for the method (1), refer to the related description in the embodiment shown in FIG. 8 or FIG. 9 for details, and details are not repeated here.
  • Manner (2) The access network device determines the first communication link, and informs the relay UE of the information of the first communication link.
  • the relay UE determines the second communication link according to the candidate PC5 interface communication link.
  • the access network device may determine to transmit the data of the first service through the first communication link between the access network device and the relay UE according to the Uu QoS requirement information of the first service.
  • the candidate PC5 interface communication link may be determined by the access network device, and the information of the candidate PC5 interface communication link may be notified to the relay UE.
  • the information of the candidate PC5 interface communication link may be identification information of the candidate PC5 interface communication link, such as the ID of the candidate PC5 interface communication link.
  • the access network device can use the corresponding relationship between the first Uu QoS parameter and the first PC5 QoS parameter, and the Uu of at least two services (such as the first service, the second service, and the third service) of the remote UE.
  • QoS requirement information determine at least two PC5 interface communication links of the remote UE (ie candidate PC5 interface communication links), and inform the relay UE of the identification information of the at least two PC5 interface communication links for the relay UE Select the second communication link from it.
  • the corresponding relationship between the first Uu QoS parameter and the first PC5 QoS parameter may be obtained by the access network device from the PCF network element.
  • the access network device can be based on the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter, and different remote UEs (such as remote UE 1, remote UE 2 and remote UE 3) have the same or similar
  • the Uu QoS requirement information of the QoS requirement service determines at least two PC5 interface communication links (that is, candidate PC5 interface communication links) for the relay UE to select the second communication link from them.
  • Manner (3) The access network device determines the first communication link, and informs the relay UE of the information of the first communication link.
  • the remote UE or the relay UE determines the second communication link according to the PC5 QoS parameters of the first service.
  • the access network device may determine the first communication link according to the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter, and Uu QoS requirement information of the first service.
  • the information of the first communication link may be identification information of the first communication link or configuration information of the first communication link.
  • the foregoing method further includes: the remote UE determines to use the relay UE to transmit the first service.
  • the remote UE may determine to use the relay UE to transmit the first service according to one or more of the capability information of the remote UE, the subscription information of the first service, or the subscription information of the remote UE. For example, when the remote UE has a first service transmission requirement, it determines to use the relay UE to transmit the first service according to the ability information of the remote UE to support the relay mode transmission service and the subscription information that allows the relay mode to be used to transmit the first service.
  • FIG. 8 and FIG. 9 are described with an example in which the first communication link is the first DRB and the second communication link is the first SLRB.
  • FIG. 8 a data transmission method of a proximity service provided by an embodiment of the present application is specifically described as follows.
  • the access network device receives Uu QoS requirement information of the first service.
  • the first service may be a service that the remote UE wants or is about to use for transmission by the relay UE.
  • the first service can be a specific service, such as video service, voice service, CRBT service, text transmission service, etc.; it can also be a certain type of service, such as network slicing service, instant messaging service, life service service, etc. Wait.
  • the Uu QoS requirement information of the first service may refer to the QoS configuration requirement of the Uu interface of the first service.
  • the Uu QoS requirement information of the first service may include one or more of the following parameters of the Uu interface of the first service: the resource type of the Uu interface, the scheduling priority of the Uu interface, the delay of the Uu interface, and the Uu interface The packet loss rate, the maximum burst traffic of the Uu interface, or the time window size of the Uu interface.
  • the resource type of the Uu interface may include one or more of the following: GBR type, Non-GBR type, and delay critical guaranteed bit rate (Delay-critical GBR) type.
  • the Uu QoS requirement information of the first service may be represented by a 5G QoS indication (5G QoS Indication, 5QI).
  • 5G QoS Indication 5G QoS Indication
  • Table 1 shows a mapping relationship between 5QI and Uu QoS parameters.
  • the U QoS requirement information of the first service may also be expressed in other forms, and the embodiment of the present application does not specifically limit the specific expression form of the U QoS requirement information.
  • the access network device determines to transmit the data of the first service through the first DRB according to the Uu QoS requirement information of the first service.
  • the first DRB can meet the QoS configuration requirements of the first service on the Uu interface.
  • the QoS configuration requirements may include the resource type, scheduling priority, delay, packet loss rate, maximum burst traffic or time of the Uu interface.
  • Configuration requirements for QoS parameters such as window size.
  • multiple communication links may be used to transmit service data between the relay UE and the access network device.
  • Different communication links can be of different resource types, can achieve different scheduling priorities, delays, packet loss rates, maximum burst traffic, or can use time windows of different sizes.
  • the access network device can select a DRB that can meet the Uu QoS configuration requirements of the first service from the multiple DRBs between the relay UE and the access network device according to the Uu QoS requirement information of the first service, such as the first service. DRB.
  • the access network device determines the first SLRB according to the correspondence between the first QoS parameter and the first PC5 QoS parameter, and the QoS requirement information of the first service.
  • the first SLRB may be used to transmit data of the first service between the relay UE and the remote UE.
  • the first Uu QoS parameter may be used to transmit the data of the first service through the Uu interface between the relay UE and the access network device.
  • the first PC5 QoS parameter (that is, the PC5 QoS parameter of the first service) may be used to transmit the data of the first service through the PC5 interface between the relay UE and the remote UE.
  • the correspondence between the Uu QoS parameter and the PC5 QoS parameter that can be acquired and stored by the access network device may be expressed in the form of the correspondence between the 5QI and the PC5 QoS indication (PC5 QoS Indication, PQI).
  • the correspondence between Uu QoS parameters and PC5 QoS parameters mentioned in this application may include one or more correspondences, and each correspondence is one or a set of U QoS parameters and one or a set of PC5 QoS parameters.
  • Table 2 shows a mapping relationship between PQI and PC5 QoS parameters.
  • the correspondence between the U QoS parameter and the PC5 QoS parameter may also be expressed in other forms, and the embodiment of the present application does not specifically limit the specific expression form of the correspondence between the U QoS parameter and the PC5 QoS parameter.
  • multiple communication links can be used to transmit service data between the relay UE and the remote UE.
  • Different communication links can be of different resource types, can achieve different scheduling priorities, delays, packet loss rates, maximum burst traffic, or can use time windows of different sizes.
  • the access network device may obtain and store the correspondence between the Uu QoS parameter and the PC5 QoS parameter. Further, the access network device may correspond the Uu QoS requirement information of the first service to the PC5 QoS parameter according to the correspondence between the U QoS parameters and the PC5 QoS parameters, and the U QoS requirement information of the first service.
  • the access network device selects the resource type, scheduling priority, delay, packet loss rate, maximum burst traffic or time window that best meets the Uu interface of the first service from the corresponding relationship between Uu QoS parameters and PC5 QoS parameters
  • One or a group of Uu QoS parameters required by one or more QoS parameters such as size, and one or a group of PC5 QoS parameters corresponding to the one or a group of Uu QoS parameters are determined.
  • the first SLRB that can satisfy the one or a set of PC5 QoS parameters is determined.
  • the first SLRB can meet the QoS configuration requirements of the first service on the PC5 interface between the remote UE and the relay UE.
  • PC5 QoS parameters and Uu QoS parameters that have a corresponding relationship can usually meet the configuration requirements of the service for QoS parameters such as resource type, scheduling priority, delay, packet loss rate, maximum burst flow, or time window size.
  • the Uu QoS requirement information of the first service of the remote UE includes the following parameter requirements: the resource type is GRB.
  • the scheduling priority is 30, the delay requirement is no higher than 50ms, the packet loss rate is no higher than 10 -3 , and the average time window size is 2000ms.
  • the first Uu QoS parameter can satisfy QoS such as the resource type of the first service on the Uu interface, the scheduling priority of the Uu interface, the delay of the Uu interface, the packet loss rate of the Uu interface, the maximum burst traffic of the Uu interface or the time window size of the Uu interface, etc. Parameter configuration requirements.
  • the first PC5 QoS parameter can meet the QoS parameters such as the resource type of the first service on the PC5 interface, the scheduling priority of the PC5 interface, the delay of the PC5 interface, the packet loss rate of the PC5 interface, the maximum burst traffic of the PC5 interface, or the size of the time window of the PC5 interface. Configuration requirements.
  • the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter may be pre-stored in the access network device.
  • the correspondence between Uu QoS parameters and PC5 QoS parameters may also be created and maintained by the PCF.
  • the access network device can obtain the correspondence between the Uu QoS parameter and the PC5 QoS parameter from the PCF network element through the AMF network element.
  • the access network device can obtain the correspondence between the Uu QoS parameter and the PC5 QoS parameter through steps S800-1 and S800-2 shown in FIG. 8:
  • the PCF network element sends the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter to the AMF network element.
  • the AMF network element receives the correspondence between the Uu QoS parameter and the PC5 QoS parameter from the PCF network element.
  • the PCF network element can receive the input of the network maintenance personnel to maintain the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter.
  • the PCF network element can also generate and maintain the corresponding relationship between the Uu QoS parameters and the PC5 QoS parameters.
  • the PCF network element generates Uu QoS parameters and PC5 QoS parameters according to the service subscription data and the transmission capabilities of remote UEs and relay UEs. The corresponding relationship.
  • the PCF network element may also obtain the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter in other ways.
  • the embodiment of the present application does not specifically limit the generation method of the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter.
  • the AMF network element sends the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter to the access network device.
  • the access network device receives the correspondence between the Uu QoS parameter and the PC5 QoS parameter from the AMF network element.
  • the remote UE in the process of the remote UE registering with the AMF network element, the remote UE carries in the registration request message the capability information used to instruct the remote UE to support direct communication using the PC5 interface, and the AMF network element may determine according to the capability information Send the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter to the access network device.
  • the AMF network element can also send Uu QoS requirement information of the first service to the access network device. Further, the AMF network element may also forward the QFI allocated by the SMF network element for the QoS flow to the access network device. Among them, the Uu QoS requirement information and QFI of the first service can be sent to the access network device when the AMF network element sends the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter, or can be sent to the access network device separately by the AMF network element This embodiment of the application does not limit this.
  • the AMF network element may also send to the access network device a list of PLMNs that can be used by the remote UE for ProSe communication, the radio frequency band information that the remote UE can use outside the network coverage, and the QoS requirement information is mapped to the PQI rule Or one or more of the standardized PQI, etc.
  • the AMF network element can send the corresponding relationship between the Uu QoS parameter and the PC5 QoS parameter to the access network device during the remote UE's registration with the AMF network element, or it can also be sent to the access network device in other procedures of the remote UE.
  • Network equipment such as the service request process, the PDU session establishment process, or the PDU session recovery process, is not limited in this application.
  • the access network device sends the first communication link information to the relay UE.
  • the first communication link information may be used to characterize the correspondence between the first DRB and the first SLRB.
  • the relay UE receives the first communication link information from the access network device.
  • the first DRB is used to transmit data of the first service between the relay UE and the access network device
  • the first SLRB is used to transmit data of the first service between the relay UE and the remote UE.
  • the corresponding relationship between the first DRB and the first SLRB is established by the access network device. It can be understood that after the access network device obtains the first DRB, the first SLRB, and the QFI, the corresponding relationship between the first DRB and the first SLRB can be established for the service data corresponding to the QFI, and the corresponding relationship between the first DRB and the first SLRB can be established through the first DRB and the first SLRB.
  • the transmission channel formed by SLRB transmits the service data of the service.
  • the relay UE sends the configuration information of the first SLRB to the remote UE.
  • the remote UE receives the configuration information of the first SLRB from the relay UE.
  • the relay UE may send the configuration information of the first SLRB to the remote UE through the PC5 interface.
  • the configuration information of the first SLRB is used by the remote UE to use the first SLRB to transmit data of the first service between the relay UE.
  • the configuration information of the first SLRB may include one or more of the following: identification information of the first SLRB, configuration information of the RLC layer in the PC5 interface protocol stack, or configuration information of the MAC layer in the PC5 interface protocol stack.
  • the identification information of the first SLRB may be used by the remote UE to determine the PC5 interface communication link for PC5 communication between the relay UE and the remote UE.
  • the configuration information of the RLC layer in the PC5 interface protocol stack and the configuration information of the MAC layer in the PC5 interface protocol stack can be used for the remote UE and the relay UE to unify the RLC layer and the MAC layer's data processing methods, for example, unified data packets The division and reorganization method of data packets, the retransmission method of unified data packets, etc.
  • the relay UE transmits the data of the first service of the remote UE.
  • the transmission involved in this application may include sending and/or receiving, and the transmission direction is not limited.
  • the relay UE may be based on the first communication link information characterized by the first communication link.
  • the correspondence between a DRB and the first SLRB is determined to send the uplink data of the first service to the access network device through the first DRB corresponding to the first SLRB (as shown in S806-b in FIG. 8).
  • the relay UE can be based on the first communication link information characterized by the first communication link.
  • the correspondence between a DRB and the first SLRB is determined to send the downlink data of the first service to the remote UE through the first SLRB corresponding to the first DRB (as shown in S806-a in FIG. 8).
  • the method provided in this embodiment may be based on the method shown in FIG. 8, and S804 is replaced with S901 and S902:
  • the access network device sends second communication link information to the relay UE.
  • the relay UE establishes a correspondence between the first DRB and the first SLRB according to the second communication link information.
  • the second communication link information includes identification information of the first DRB and identification information of the first SLRB.
  • the second communication link information includes configuration information of the first DRB and configuration information of the first SLRB.
  • the configuration information of the first DRB may include one or more of the following: identification information of the first DRB, configuration information of the RLC layer in the Uu interface protocol stack, or configuration information of the MAC layer in the Uu interface protocol stack.
  • the configuration information of the first SLRB may include one or more of the following: identification information of the first SLRB, configuration information of the RLC layer in the PC5 interface protocol stack, or configuration information of the MAC layer in the PC5 interface protocol stack.
  • the identification information of the first DRB may be the ID of the first DRB, and the identification information of the first SLRB may be the ID of the first SLRB.
  • the identification information of the DRB and/or the identification information of the SLRB may be represented by the ID of the RLC channel.
  • the identification information of the DRB or the identification information of the SLRB may also be represented in other forms, which are not limited.
  • the access network device determines the corresponding relationship between the Uu QoS requirement information of the first service and the U QoS parameter and the PC5 QoS parameter for the relay UE and the access network.
  • the first communication link ie, the first DRB
  • the second communication link ie, the first DRB
  • the first SLRB in order to solve the problem that the QoS parameters of the Uu interface communication link and the PC5 interface communication link in the conventional technology cannot be completed due to the mismatch of the QoS parameters of the communication link of the PC5 interface.
  • FIG. 10 and FIG. 11 are described with an example in which the first communication link is the first DRB and the second communication link is the first SLRB, and the details are described as follows.
  • Figure 10 shows another method for data transmission of proximity services provided by this application. This method can be based on the embodiment shown in Figure 9, and further replace S803 with S1001, S901 with S1002, and S902 with S1003 and S1004 is specifically described as follows.
  • the access network device determines at least two PC5 interface communication links of the remote UE according to the corresponding relationship between the first QoS parameter and the first PC5 QoS parameter, and the QoS requirement information of the first service.
  • the access network device may correspond the U QoS requirement information of the first service to the PC5 QoS parameter according to the corresponding relationship between the U QoS parameter and the PC5 QoS parameter, and the U QoS requirement information of the first service.
  • the access network device selects the resource type, scheduling priority, delay, packet loss rate, maximum burst traffic or time window that best meets the Uu interface of the first service from the corresponding relationship between Uu QoS parameters and PC5 QoS parameters
  • One or a group of Uu QoS parameters required by one or more QoS parameters such as size, and multiple or more sets of PC5 QoS parameters corresponding to the one or a group of Uu QoS parameters are determined.
  • at least two PC5 interface communication links that can meet the multiple or multiple sets of PC5 QoS parameters are determined.
  • the at least two PC5 interface communication links can meet the QoS configuration requirements of the first service on the PC5 interface between the remote UE 1 and the relay UE.
  • the access network device sends third communication link information to the relay UE.
  • the relay UE receives the third communication link information from the access network device.
  • the third communication link information is used to characterize the first correspondence.
  • the first correspondence is the correspondence between the first DRB and at least two PC5 interface communication links of the remote UE.
  • the third communication link information may be sent by the access network device to the relay UE in the form of a table, or may be sent to the relay UE in other forms, which is not limited.
  • Table 3 is only described in one form, and the form can also be in other forms without limitation.
  • the first DRB in Table 3 is a communication link determined by the access network device for transmitting the data of the first service between the access network device and the relay UE.
  • the first SLRB, the second SLRB, and the third SLRB are candidate communication links that are determined by the access network device and can be used to transmit data of the first service between the relay UE and the remote UE 1.
  • the correspondence between "Uu interface communication link" and "PC5 interface communication link” in Table 3 is the first correspondence.
  • the relay UE determines the first SLRB from at least two PC5 interface communication links of the remote UE characterized by the third communication link information.
  • the relay UE may obtain from the access network device the at least two PC5 interface communication links of the remote UE that are occupied (such as the occupancy rate), from the above-mentioned remote UE's at least two PC5 interface communication links.
  • the second communication link used to transmit the data of the first service is determined in the path, such as the first SLRB.
  • the relay UE may monitor the usage of at least two PC5 interface communication links of the aforementioned remote UE, and select the PC5 interface communication link with the smallest occupancy rate as the second communication link.
  • the occupancy rate of at least two PC5 interface communication links of the remote UE refers to the ratio of the time during which the received power of the communication link monitored by the relay UE is greater than the preset power within a preset time period. Or, the ratio of the time that the signal strength of the remote UE received on the communication link monitored by the relay UE is less than the preset signal strength.
  • the relay UE establishes a correspondence between the first DRB and the first SLRB.
  • the third communication link information sent by the access network device to the relay UE includes: identification information of the first DRB and identification information of at least two PC5 interface communication links of the remote UE.
  • the relay UE may determine the first SLRB from at least two PC5 interface communication links of the remote UE, and establish the correspondence between the first DRB and the first SLRB.
  • the relay UE when the downlink data of the first service from the access network device reaches the relay UE through the first DRB, the relay UE can follow the downlink data packet of the access network device on the first service.
  • the SLRB tag (such as the identification information of the first SLRB) added in the file determines which SLRB is used to transmit the downlink data packet of the first service to the remote UE.
  • the relay UE passes the first DRB The uplink data packet of the first service is transmitted to the access network device.
  • the method provided in this embodiment may further include steps S1101-S1102 on the basis of the method shown in FIG. 10.
  • S1003 is replaced with S1103, specifically as follows Said.
  • the access network device sends the PC5 QoS parameter of the first service to the relay UE.
  • the relay UE receives the PC5 QoS parameter of the first service from the access network device.
  • the PC5 QoS parameter of the first service may be determined by the access network device according to the U QoS requirement information of the first service in combination with the corresponding relationship between the U QoS parameter and the PC5 QoS parameter.
  • the PC5 QoS parameter of the first service may be the PC5 QoS parameter that has the highest degree of matching with the U QoS requirement information of the first service in the correspondence between the U QoS parameter and the PC5 QoS parameter.
  • the Uu QoS requirement information of the first service is represented by 5QI: 3
  • the PC5 QoS parameter of the first service with the highest matching degree can be represented by PQI: 3.
  • the access network device sends the second correspondence to the relay UE.
  • the second correspondence is the correspondence between at least two PC5 interface communication links of the remote UE represented by the third communication link information and the PC5 QoS parameters.
  • the relay UE receives the second correspondence from the access network device.
  • the second correspondence and the first correspondence may be sent by the access network device to the relay UE through the third communication link information together with the first correspondence.
  • the third communication link information may be sent by the access network device to the relay UE in the form of a table. As shown in Table 4 below:
  • the first DRB in Table 4 is a communication link determined by the access network device for transmitting the data of the first service between the access network device and the relay UE.
  • the first SLRB, the second SLRB, and the third SLRB are candidate communication links that are determined by the access network device and can be used to relay the data of the first service between the UE and the remote UE.
  • PQI: 3, PQI: 4, and PQI: 5 are the PC5 QoS parameters corresponding to the first SLRB, the second SLRB, and the third SLRB, respectively.
  • the correspondence between "Uu interface communication link" and "PC5 interface communication link" in Table 4 is the first correspondence.
  • the correspondence between "PC5 interface communication link" and "PC5 QoS parameters" in Table 4 is the second correspondence.
  • the relay UE determines the first SLRB from at least two PC5 interface communication links of the remote UE represented by the third communication link information according to the PC5 QoS parameters of the first service, the first correspondence and the second correspondence.
  • the relay UE knows that the first SLRB, the second SLRB, and the third SLRB are candidate communication links that can be used to transmit data of the first service between the relay UE and the remote UE.
  • the second correspondence shows that the first SLRB, the second SLRB, and the third SLRB can respectively meet the PC5 QoS parameter requirements corresponding to PQI: 3, PQI: 4, and PQI: 5, and the PC5 QoS parameter of the first service is PQI: 3.
  • the relay UE can determine that among the first SLRB, the second SLRB, and the third SLRB, the first SLRB that can best meet the transmission requirements of the PC5 interface of the first service is the first SLRB.
  • the access network device may map different QoS flows to the same DRB when mapping the QoS flow to the DRB.
  • QoS flows mapped to the same DRB have partially similar or identical QoS parameters.
  • different QoS flows have the same scheduling priority, or similar delays or packet loss rates, and so on.
  • the remote UE has transmission requirements for the first service and the second service, and the QoS flows used by the first service and the second service are different, but some of the QoS parameters are similar or the same, then the QoS flow of the first service and the QoS of the second service Streams can be mapped to the same DRB for transmission.
  • the third communication link information sent by the access network device to the relay UE may include the first correspondence and the second correspondence.
  • the first correspondence is the relationship between at least two PC5 interface communication links (including the second communication link (such as the first SLRB) and the third communication link (such as the second SLRB)) of the first DRB and the remote UE 1
  • the second correspondence is the correspondence between each PC5 interface communication link and the PC5 QoS parameters in the first correspondence. As shown in Table 5 below:
  • the first DRB in the foregoing Table 5 is a Uu interface communication link determined by the access network device and used to transmit the data of the first service and the second service of the remote UE 1 between the access network device and the relay UE.
  • the first DRB is determined by the access network device according to the received U QoS requirement information of the first service and U QoS requirement information of the second service.
  • the first SLRB and the second SLRB are PC5 interface communication links that are determined by the access network device and used to transmit data of the first service and the second service between the remote UE 1 and the relay UE, respectively.
  • the first SLRB is determined by the access network device according to the correspondence between the first QoS parameter and the first PC5 QoS parameter, and the QoS requirement information of the first service.
  • the second SLRB is determined by the access network device according to the correspondence between the second QoS parameter and the second PC5 QoS parameter, and the QoS requirement information of the second service.
  • the second Uu QoS parameter is used to transmit data of the second service through the Uu interface between the relay UE and the access network device
  • the second PC5 QoS parameter is used to pass the PC5 interface between the relay UE and the remote UE 1 Transmit the data of the second service.
  • the method of determining the SLRB according to the corresponding relationship between the U QoS parameters and the PC5 QoS parameters, and the U QoS requirement information of the service you can refer to the above introduction, which will not be repeated here.
  • the relay UE can determine the second communication link that can meet the transmission requirements of the first service from the first SLRB and the second SLRB according to the third communication link information and the PC5 QoS parameters of the first service. , The first SLRB.
  • the remote UE 1 has a third service transmission requirement in addition to the above-mentioned first service and second service transmission requirements, and the QoS requirements of the first service, the second service and the third service are the same or similar, then the first The service, the second service and the third service can be mapped to the same QoS flow for transmission.
  • the third communication link information sent by the access network device to the relay UE may include the first correspondence and the second correspondence.
  • the first correspondence is that at least two PC5 interface communication links (including the second communication link (such as the first SLRB), the third communication link (such as the second SLRB) and the first DRB and the remote UE 1
  • the correspondence between the four communication links (such as the third SLRB); the second correspondence is the correspondence between each PC5 interface communication link and the PC5 QoS parameter in the first correspondence.
  • the first DRB is a Uu interface determined by the access network device to transmit the data of the first service, the second service, and the third service of the remote UE 1 between the access network device and the relay UE. Communication link.
  • the first DRB is determined by the access network device according to the received U QoS requirement information of the first service, U QoS requirement information of the second service, and U QoS requirement information of the third service.
  • the first SLRB, the second SLRB, and the third SLRB are the PC5 interface communication links determined by the access network equipment to transmit the data of the first service, the second service, and the third service between the remote UE 1 and the relay UE. road.
  • the first SLRB is determined by the access network device according to the correspondence between the first QoS parameter and the first PC5 QoS parameter, and the QoS requirement information of the first service.
  • the second SLRB is determined by the access network device according to the correspondence between the second QoS parameter and the second PC5 QoS parameter, and the QoS requirement information of the second service.
  • the third SLRB is determined by the access network device according to the correspondence between the third Uu QoS parameter and the third PC5 QoS parameter, and the Uu QoS requirement information of the third service.
  • the second Uu QoS parameter is used to transmit data of the second service through the Uu interface between the relay UE and the access network device
  • the second PC5 QoS parameter is used to pass the PC5 interface between the relay UE and the remote UE 1 Transmit the data of the second service.
  • the third Uu QoS parameter is used to transmit data of the third service through the Uu interface between the relay UE and the access network device
  • the third PC5 QoS parameter is used to transmit the third service data through the PC5 interface between the relay UE and the remote UE 1.
  • the relay UE can determine the second communication that can meet the transmission requirements of the first service from the first SLRB, the second SLRB, and the third SLRB according to the communication link information and the PC5 QoS parameters of the first service.
  • Link that is, the first SLRB.
  • the relay UE can add the downlink data packet of the first service according to the access network device PC5 QoS parameter information (such as PQI: 3) determines which SLRB is used to transmit the downlink data packet of the first service to the remote UE.
  • PC5 QoS parameter information can be added to the header of the data packet sent from the PDCP layer to the RLC layer, or added to the header of the data packet sent from the adaptation layer to the RLC layer.
  • the relay UE When the uplink data of the first service from the remote UE arrives at the relay UE, regardless of whether the uplink data packet is transmitted to the relay UE through the first SLRB, the second SLRB or the third SLRB, the relay UE passes the first DRB The uplink data packet of the first service is transmitted to the access network device.
  • the remote UE 1 and the remote UE 2 have the transmission requirements of the first service and the fourth service respectively, and the QoS requirements of the first service and the fourth service are the same or similar, then the first service and the fourth service can be mapped To the same QoS flow for transmission.
  • the third communication link information sent by the access network device to the relay UE may include the first DRB and at least two PC5 interface communication links (including the second communication link (e.g., Correspondence between the first SLRB) and the fourth communication link (such as the fifth SLRB). As shown in Table 6 below:
  • the first DRB in Table 6 is the Uu interface determined by the access network device to transmit the data of the first service of the remote UE 1 and the fourth service of the remote UE 2 between the access network device and the relay UE. Communication link.
  • the first DRB is determined by the access network device according to the received U QoS requirement information of the first service and U QoS requirement information of the fourth service.
  • the first SLRB is a PC5 interface communication link that is determined by the access network device and used to transmit data of the first service between the remote UE 1 and the relay UE.
  • the first SLRB is determined by the access network device according to the correspondence between the first QoS parameter and the first PC5 QoS parameter, and the QoS requirement information of the first service.
  • the second SLRB is a PC5 interface communication link that is determined by the access network device and used to transmit data of the fourth service between the remote UE 2 and the relay UE.
  • the second SLRB is determined by the access network device according to the correspondence between the fourth U QoS parameter and the fourth PC5 QoS parameter, and U QoS requirement information of the fourth service.
  • the fourth Uu QoS parameter is used to transmit data of the fourth service through the Uu interface between the relay UE and the access network device
  • the fourth PC5 QoS parameter is used to pass the PC5 interface between the relay UE and the remote UE 1 Transmit the data of the fourth service.
  • the relay UE can determine the second communication link that can meet the transmission requirements of the first service from the first SLRB and the second SLRB according to the third communication link information, combined with the identification information of the remote UE 1, That is, the first SLRB.
  • the relay UE may add the downlink data packet of the first service according to the access network device’s
  • the identification information of the remote UE (such as the remote UE 1) determines which SLRB is used to transmit the downlink data packet of the first service to the remote UE.
  • the relay UE When the uplink data of the first service from the remote UE arrives at the relay UE, regardless of whether the uplink data packet is transmitted to the relay UE through the first SLRB or the second SLRB, the relay UE will use the first DRB to transfer the first data packet to the relay UE.
  • the uplink data packets of the service are transmitted to the access network equipment.
  • the access network device may also determine the correspondence between the first Uu QoS parameter and the first PC5 QoS parameter by itself. For example, when a remote UE accesses a 5GC through a relay UE to establish or update a PDU session, the access network device can send the AMF network element according to the PC5 QoS parameters of the first service of the remote UE from the PCF network element (ie The first PC5 QoS parameter) and the U QoS parameter of the first service (such as the first U QoS parameter) sent by the AMF network element determine the correspondence between the first U QoS parameter and the first PC5 QoS parameter. For example, the access network device can map the first PC5 QoS parameter with the first Uu QoS parameter by itself.
  • the PCF network element can send the Uu QoS requirement information of the first service to the SMF network element through the PCC rule.
  • the SMF network element maps the data flow to the QoS flow according to the PCC rules, and sends the QoS flow information and the Uu QoS parameters of the first service to the access network device through the N2 message.
  • the access network device may map the U QoS parameter of the first service to one of the multiple PC5 QoS parameters from the PCF forwarded by the AMF received by the access network device through the N1 message. Obtain the correspondence between the first PC5 QoS parameter and the first Uu QoS parameter. Then, the access network device may determine the first DRB and the first SLRB according to the correspondence between the first PC5 QoS parameter and the first Uu QoS parameter; or, determine the first DRB and at least two PC5 communication links, and so on.
  • the communication mode of the PC5 interface used by the relay UE and the remote UE may be an ad hoc mode or an autonomous resource scheduling mode. That is to say, the PC5 interface communication link can be selected by the relay UE or the remote UE in the radio resource pool pre-configured by the access network device (such as a base station) or the core network device (such as a PCF network element).
  • the radio resource pool includes multiple SLRBs that can be selected by the relay UE or the remote UE. In this case, as described in the embodiment corresponding to FIG. 10, FIG. 11, and the foregoing Table 5 or Table 6, the access network device will not directly allocate the first SLRB to the relay UE and the remote UE.
  • the access network device determines that the first service is used to transmit the first service between the relay UE and the access network device according to the Uu QoS requirement information of the first service.
  • the first communication link ie, the first DRB of the service data of the service; the access network device determines at least Two PC5 interface communication links, so that the relay UE can select the second communication link (that is, the first SLRB) that is ultimately used to transmit the service data of the first service between the remote UE and the relay UE, so as to solve the conventional technology
  • FIG. 12 and FIG. 13 are described with an example in which the first communication link is the first DRB and the second communication link is the first SLRB, and the details are described as follows.
  • FIG. 12 shows another data transmission method of the proximity service provided by the present application.
  • the first SLRB is determined by the relay UE according to the PC5 QoS parameters of the first service.
  • the method may be based on the embodiment shown in FIG. 8, and further replace S800-1, S800-2, and S801-S804 with S1202-S1205, as described in detail below.
  • the AMF network element sends the PC5 QoS parameter of the first service of the remote UE from the PCF network element to the remote UE.
  • the remote UE receives the PC5 QoS parameter of the first service from the AMF network element.
  • the PCF network element when the remote UE accesses the 5GC through the relay UE and establishes or updates the PDU session, the PCF network element will send the PC5 QoS parameters of the first service to the AMF network element.
  • the AMF network element can forward the PC5 QoS parameters of the first service to the remote UE through the access network equipment and the relay UE.
  • the PC5 QoS parameters of the first service include one or more of the following parameters: the resource type of the PC5 interface, the scheduling priority of the PC5 interface, the delay of the PC5 interface, the packet loss rate of the PC5 interface, and the maximum of the PC5 interface Burst traffic or the time window size of the PC5 interface.
  • the resource types of the PC5 interface include one or more of the following: GBR type, Non-GBR type, and Delay-critical GBR type.
  • the remote UE sends the PC5 QoS parameter of the first service to the relay UE.
  • the relay UE receives the PC5 QoS parameters of the first service from the remote UE.
  • the access network device sends the identification information of the first DRB to the relay UE.
  • the access network device may send the configuration information of the first DRB to the relay UE.
  • the configuration information of the first DRB includes identification information of the first DRB.
  • the identification information of the first DRB may be the ID of the first DRB.
  • the relay UE receives the identification information of the first DRB from the access network device.
  • the first DRB may be obtained by the access network device mapping the first service to the DRB according to the Uu QoS requirement information of the first service.
  • the relay UE determines the first SLRB according to the PC5 QoS parameter of the first service.
  • the relay UE may map the first service to the SLRB according to the PC5 QoS parameter of the first service to obtain the first SLRB.
  • the relay UE may select an SLRB that can match the PC5 QoS parameter from the radio resource pool according to the PC5 QoS parameter of the first service to obtain the first SLRB.
  • the wireless resource pool is pre-configured for the relay UE by an access network device (such as a base station) or a core network device (such as a PCF network element), and the wireless resource pool includes multiple SLRBs that can be selected by the relay UE.
  • the relay UE establishes a correspondence between the first DRB and the first SLRB according to the identification information of the first DRB and the determined first SLRB.
  • the first SLRB may be determined by the remote UE according to the PC5 QoS parameters of the first service.
  • the method may be based on the embodiment shown in FIG. 12, and further replace S1202 and S1204 with S1301 and S1302, and in addition, replace S1205 and S805 with S1303, refer to FIG. 13, and the details are as follows.
  • the remote UE determines the first SLRB according to the PC5 QoS parameters of the first service.
  • the remote UE may map the first service to the SLRB according to the PC5 QoS parameter of the first service to obtain the first SLRB.
  • the remote UE may select an SLRB that can match the PC5 QoS parameter from the radio resource pool according to the PC5 QoS parameter of the first service to obtain the first SLRB.
  • the radio resource pool is pre-configured for the remote UE by an access network device (such as a base station) or a core network device (such as a PCF network element), and the wireless resource pool includes multiple SLRBs that can be selected by the remote UE.
  • the remote UE sends the configuration information of the first SLRB to the relay UE.
  • the relay UE receives the configuration information of the first SLRB from the remote UE.
  • the configuration information of the first SLRB includes at least one or more of the following: identification information of the first SLRB (eg, ID of the first SLRB), configuration information of the RLC layer in the PC5 interface protocol stack, or MAC in the PC5 interface protocol stack Layer configuration information.
  • the relay UE establishes a correspondence between the first DRB and the first SLRB according to the identification information of the first DRB and the configuration information of the first SLRB.
  • the access network device determines the first communication link (ie, the first communication link) used to transmit the service data of the first service between the relay UE and the access network device.
  • DRB for example, determined according to the Uu QoS requirement information of the first service
  • the relay UE or the remote UE determines the first service data transmission between the remote UE and the relay UE according to the PC5 QoS parameters of the first service.
  • the second communication link (that is, the first SLRB) is to solve the problem that the QoS parameters of the Uu interface communication link and the PC5 interface communication link in the conventional technology cannot be completed due to the mismatch of the QoS parameters of the communication link of the PC5 interface.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not be implemented in this application.
  • the implementation process of the example constitutes any limitation.
  • the relay UE, access network equipment, remote UE or other network equipment includes performing various functions.
  • Corresponding hardware structure and/or software module includes performing various functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of this application can divide the functional modules of relay UE, access network equipment, remote UE or other network equipment (such as PCF network element, SMF network element or AMF network element) and other equipment, for example, can correspond to each function division
  • Each functional module can also integrate two or more functions into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 14 a structural block diagram of a UE provided in an embodiment of this application.
  • the UE may be a relay UE or a remote UE.
  • the UE may include a transceiver unit 1410 and a processing unit 1420.
  • the transceiver unit 1410 is used to support the relay UE to perform the above steps S701, S804, S805, S806 (including S806-a and S806-b), S901, S1002, S1101, S1102, S1202, S1203 or S1302, and/or other processes used in the techniques described herein.
  • the processing unit 1420 is configured to support the relay UE to perform the foregoing steps S702, S902, S1003, S1004, S1103, S1104, S1204, S1205, or S1303, and/or other processes used in the technology described herein.
  • the transceiver unit 1410 is used to support the remote UE to perform the above steps S805, S806-a, S1201, S120, or S1302, and/or other processes used in the technology described herein.
  • the processing unit 1420 is configured to support the remote UE to perform the above step S1301, and/or other processes used in the technology described herein.
  • the network device may be a network device such as the aforementioned access network device, AMF network element, PCF network element, or SMF network element.
  • the network device may include a transceiving unit 1510 and a processing unit 1520.
  • the transceiving unit 1510 may support the access network device to perform the foregoing steps S800-2, S804, S806-b, S901, S1002, S1101, S1102, or S1203, and/or use Other processes in the technology described in this article.
  • the foregoing processing unit 1520 may support the access network device to perform the foregoing steps S801, S802, S803, or S1001, and/or other processes used in the technology described herein.
  • the network device is an AMF network element
  • the foregoing transceiver unit 1510 may support the AMF network element to perform the foregoing steps S800-1, S800-2, or S1201, and/or other processes used in the technology described herein.
  • the foregoing transceiver unit 1510 may support the PCF network element to perform the foregoing steps S800-1 or S1201, and/or other processes used in the technology described herein.
  • the above-mentioned transceiving unit 1410 and transceiving unit 1510 may include radio frequency circuits.
  • the UE or network equipment can receive and send wireless signals through a radio frequency circuit.
  • the radio frequency circuit includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency circuit can also communicate with other devices through wireless communication.
  • the wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communications, General Packet Radio Service, Code Division Multiple Access, Wideband Code Division Multiple Access, Long Term Evolution, Email, Short Message Service, etc.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium, (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage known in the art Medium.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in the detection device.
  • the processor and the storage medium may also exist as discrete components in the detection device.
  • the present application provides a communication system, which includes a remote UE, a relay UE, an access network device, an AMF unit, and a PCF unit.
  • the communication system is used to implement the data transmission method of the proximity service in any of the possible implementation manners provided in this application.
  • the present application provides a chip system, the chip system includes a processor, a memory, and computer program codes are stored in the memory;
  • a processor a memory
  • computer program codes are stored in the memory;
  • One possible implementation is the data transmission method of the proximity service.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be other division methods for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, 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 .

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Abstract

本申请公开了一种临近服务的数据传输方法、设备及系统，涉及无线通信技术领域，能够解决数据传输时，由于PC5接口的服务质量(quality of service，QoS)参数与Uu接口的QoS参数不匹配导致无法完成业务数据传输的问题。本申请提供的方案中，中继用户设备(user equipment，UE)通过获取第一通信链路(如DRB)和第二通信链路(如SLRB)之间的对应关系，以便可以根据该对应关系分别在中继UE与接入网设备之间通过第一通信链路，在远程UE与中继UE之间通过第二通信链路传输第一业务的业务数据。

Description

一种临近服务的数据传输方法、设备及系统
本申请要求于2020年04月03日提交国家知识产权局、申请号为202010260428.5、申请名称为“一种临近服务的数据传输方法、设备及系统”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
本申请实施例涉及无线通信技术领域，尤其涉及一种临近服务(proximity-based services，ProSe)的数据传输方法、设备及系统。
背景技术
随着智能终端的广泛使用，为了提高频谱利用率、系统吞吐量、增大网络覆盖范围等，ProSe通信被越来越广泛的应用。在ProSe通信中，终端与终端之间可以直接建立通信链路，并通过该通信链路直接通信，而不用再由接入网设备进行转发通信。
如图1所示，在第五代移动通信技术(5th-Generation，5G)通信系统的ProSe架构中，若终端1与终端2建立了PC5接口的ProSe通信链路，终端1可以通过终端2与无线接入网(radio access network，RAN)之间的Uu接口与RAN和核心网建立连接并进行通信。其中，在上述场景中，终端1可以称为远程用户设备(remote UE)，终端2可以称为中继用户设备(UE-to-network relay UE)。
其中，ProSe通信需要通过空口协议栈来实现。空口协议栈通常被分为三层：物理层(也称为Layer-1，L1层)，数据链路层(也称为Layer-2，L2层)以及网络层(也称为Layer-3，L3层)。如图2所示，5G新无线(new radio，NR)通信系统中，L2层(即数据链路层)又可以分为以下子层：介质访问控制(medium access control，MAC)层，无线链路控制(radio link control，RLC)层，分组数据融合协议(packet data convergence protocol，PDCP)层和服务数据适配协议(service data adaptation protocol，SDAP)层。其中，MAC层用于向RLC层提供逻辑信道，以及进行逻辑信道与物理信道的映射。RLC层用于向PDCP层提供RLC信道，以及进行RLC信道与逻辑信道的映射。PDCP层用于向SDAP层提供无线承载(radio bearer，RB)，以及进行RB与RLC信道的映射。RB包括控制面的信令无线承载(signaling radio bearer，SRB)和用户面的数据无线承载(data radio bearer，DBR)。SDAP层用于提供数据包的具体服务质量流(quality of service flow，QoS flow)，以及进行QoS流与RB的映射。同一个QoS流所传输的数据包使用相同的QoS参数进行处理，并用QoS流标识(QoS flow identifer，QFI)进行表示。QoS参数用于指示数据包传输所需要的资源类型、优先级、时延、丢包率或时间窗大小等参数中的一个或多个。
常规的NR ProSe通信中，如图3所示，在应用服务器有数据包需要传输时，首先，协议数据单元(Protocol Data Unit，PDU)中的数据包在远程UE的NR-SDAP层进行一次封装。然后，NR-SDAP层会根据数据包的QoS需求将数据包对应到用于物理层传输的承载上。由于NR-SDAP和NR-PDCP之间的协议如TS 38.300中所规定，是Uu接口使用的通信协议，因此NR-SDAP会根据数据包QoS需求将数据包对应到对应的 Uu QoS参数上，并通过该Uu接口下发至下层。如此，远程UE可以使用Uu QoS参数，通过PC5链路将数据包发送给中继UE。
但是，对于同一数据包，对PC5 QoS参数的需求与Uu QoS参数的需求是不同的，因此，采用上述常规的数据传输方法无法完成数据包的传输。
发明内容
本申请提供一种临近服务的数据传输方法、设备及系统，能够解决由于PC5接口的QoS参数与Uu接口的QoS参数不匹配导致无法完成业务数据传输的问题。
为达到上述目的，本申请实施例采用如下技术方案：
第一方面，提供一种临近服务的数据传输方法，应用于中继UE，该方法包括：中继UE获取第一通信链路和第二通信链路之间的对应关系；其中，第一通信链路用于在中继UE与接入网设备之间传输第一业务的数据；第二通信链路用于在中继UE与远程UE之间传输第一业务的数据；该中继UE根据获取的上述对应关系，传输远程UE的第一业务的数据。
上述第一方面提供的技术方案，中继UE通过获取第一通信链路(如DRB)和第二通信链路(如SLRB)之间的对应关系，以便可以根据该对应关系分别在中继UE与接入网设备之间通过第一通信链路，在远程UE与中继UE之间通过第二通信链路传输第一业务的业务数据。通过这样的方案，可以解决常规技术中第一通信链路(如DRB)和第二通信链路(如SLRB)的QoS参数不匹配导致的无法完成业务数据传输的问题。
在一种可能的实现方式中，上述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：中继UE从接入网设备接收第一通信链路的标识信息和第二通信链路的标识信息；中继UE根据接收的上述第一通信链路的标识信息和第二通信链路的标识信息，建立第一通信链路和第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路和第二通信链路，由中继UE根据接入网设备确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：中继UE从接入网设备接收上述对应关系。本方案支持由接入网设备确定第一通信链路和第二通信链路，以及根据确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：中继UE从接入网设备接收第一对应关系；该第一对应关系是第一通信链路与远程UE的至少两个PC5接口通信链路之间的对应关系；中继UE从上述至少两个PC5接口通信链路中，确定第二通信链路；中继UE建立第一通信链路和第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE的至少两个候选PC5接口通信链路，由中继UE进一步从至少两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述方法还包括：中继UE从接入网设备接收第一业务的PC5服务质量QoS参数；中继UE从接入网设备接收第二对应关系；该第二对应关系是上述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系；中继UE从 上述至少两个PC5接口通信链路中，确定第二通信链路，包括：中继UE根据第一业务的PC5 QoS参数，第一对应关系和第二对应关系，从上述至少两个PC5接口通信链路中确定第二通信链路。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE的至少两个候选PC5接口通信链路，由中继UE根据第一业务的PC5 QoS参数、第一通信链路与远程UE的至少两个PC5接口通信链路之间的对应关系以及上述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系进一步从至少两个候选PC5接口通信链路中确定最终的第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一业务的PC5 QoS参数包括以下参数中的一种或多种：PC5接口的资源类型、PC5接口的调度优先级、PC5接口的时延、PC5接口的丢包率、PC5接口的最大突发流量或PC5接口的时间窗大小；其中，上述PC5接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。本申请中的业务对接口参数的要求包括但不限于资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小中的至少一种。
在一种可能的实现方式中，上述方法还包括：中继UE接收第一业务的PC5 QoS参数；上述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：中继UE从接入网设备接收所述第一通信链路的标识信息；中继UE根据第一业务的PC5QoS参数，确定第二通信链路；中继UE建立第一通信链路和所述第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路，由中继UE根据第一业务的PC5 QoS参数确定第二通信链路，从而建立第一通信链路和所述第二通信链路之间的对应关系。
在一种可能的实现方式中，上述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：中继UE从远程UE接收第二通信链路的配置信息；中继UE从接入网设接收第一通信链路的标识信息；中继UE根据第二通信链路的配置信息和第一通信链路的标识信息，建立第一通信链路和第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路，由远程UE确定第二通信链路，最后由中继UE建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一通信链路是数据无线承载DRB，第二通信链路是侧链路无线承载SLRB。
第二方面，提供一种临近服务的数据传输方法，应用于接入网设备，该方法包括：接入网设备接收第一业务的Uu QoS需求信息；接入网设备根据第一业务的Uu QoS需求信息，确定通过在接入网设备与中继UE之间的第一通信链路传输第一业务的数据；接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定第二通信链路；该第二通信链路用于在中继UE与远程UE之间传输第一业务的数据；接入网设备向中继用户设备UE发送通信链路信息，该通信链路信息用于表征或建立第一通信链路与第二通信链路之间的对应关系；其中，上述第一Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第一业务的数据，第一PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第一业务的数据。
上述第二方面提供的技术方案，接入网设备通过根据第一业务的Uu QoS需求信息确定用于在接入网设备和中继UE之间传输第一业务的数据的第一通信链路，以及根据第一业务的Uu QoS参数与PC5 QoS参数的对应关系，结合第一业务的Uu QoS需求信息确定用于在远程UE和中继UE之间传输第一业务的数据的第二通信链路。通过这样的方案，可以解决常规技术中第一通信链路(如DRB)和第二通信链路(如SLRB)不匹配导致的无法完成业务数据传输的问题。
在一种可能的实现方式中，上述通信链路信息包括第一通信链路与第二通信链路之间的对应关系；或者，通信链路信息包括第一通信链路的标识信息和第二通信链路的标识信息。本方案支持由接入网设备确定第一通信链路和第二通信链路，由中继UE根据接入网设备确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。或者，由接入网设备确定第一通信链路和第二通信链路，以及根据确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述方法还包括：接入网设备接收第二业务的Uu QoS需求信息；接入网设备根据上述第二业务的Uu QoS需求信息，确定通过第一通信链路传输第二业务的数据；接入网设备根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及第二业务的Uu QoS需求信息，确定第三通信链路；该第三通信链路用于中继UE与远程UE之间传输第二业务的数据；其中，上述通信链路信息包括第一通信链路，与远程UE的至少两个PC5接口通信链路之间的对应关系，上述至少两个PC5接口通信链路包括第二通信链路和第三通信链路；第二Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第二业务的数据，第二PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第二业务的数据。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE不同业务对应的两个候选PC5接口通信链路，由中继UE进一步从上述两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述方法还包括：接入网设备接收第三业务的Uu QoS需求信息；接入网设备根据第三业务的Uu QoS需求信息，确定通过第一通信链路传输第三业务的数据；接入网设备根据第三Uu QoS参数与第三PC5 QoS参数的对应关系，以及第三业务的Uu QoS需求信息，确定用于所述中继UE与所述远程UE之间传输所述第三业务的数据的第四通信链路；其中，上述至少两个PC5接口通信链路还包括第四通信链路；第三Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第三业务的数据，第三PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第三业务的数据。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE不同业务对应的至少两个候选PC5接口通信链路，由中继UE进一步从至少两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述方法还包括：接入网设备接收第二远程UE的第四业务的Uu QoS需求信息；接入网设备根据第四业务的Uu QoS需求信息，确定通过第一通信链路传输第四业务的数据；接入网设备根据第四Uu QoS参数与第四PC5 QoS 参数的对应关系，以及第四业务的Uu QoS需求信息，确定用于所述中继UE与所述第二远程UE之间传输所述第四业务的数据的第五通信链路；接入网设备向中继UE发送第一通信链路与第二远程UE的第五通信链路之间的对应关系；第四Uu QoS参数用于通过所述中继UE与接入网设备之间的Uu接口传输第四业务的数据，第四PC5 QoS参数用于通过中继UE与第二远程UE之间的PC5接口传输第四业务的数据；通信链路信息还包括第一远程UE的标识信息和第二远程UE的标识信息。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的不同远程UE的不同业务对应的两个PC5接口通信链路，由中继UE进一步从上述两个PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一业务的Uu QoS需求信息包括以下一种或多种：Uu接口的资源类型、Uu接口的调度优先级、Uu接口的时延、Uu接口的丢包率、Uu接口的最大突发流量或Uu接口的时间窗大小；其中，Uu接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。本申请中的业务对接口参数的要求包括但不限于资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小中的至少一种。
在一种可能的实现方式中，上述接入网设备通过协议数据单元PDU会话接收来自会话管理功能SMF网元的第一业务的Uu QoS需求信息。
在一种可能的实现方式中，上述方法还包括：接入网设备接收来自PCF网元的第一Uu QoS参数与第一PC5 QoS参数的对应关系。本方案支持由PCF网元进行第一Uu QoS参数与第一PC5 QoS参数的对应关系的管理。
第三方面，提供一种中继UE，该中继UE包括：收发单元，用于获取第一通信链路和第二通信链路之间的对应关系；其中，第一通信链路用于在中继UE与接入网设备之间传输第一业务的数据；第二通信链路用于在中继UE与远程UE之间传输第一业务的数据；处理单元，用于根据获取的上述对应关系，传输远程UE的第一业务的数据。
上述第三方面提供的技术方案，中继UE通过获取第一通信链路(如DRB)和第二通信链路(如SLRB)之间的对应关系，以便可以根据该对应关系分别在中继UE与接入网设备之间，远程UE与中继UE之间传输第一业务的业务数据。通过这样的方案，可以解决常规技术中第一通信链路(如DRB)和第二通信链路(如SLRB)不匹配导致的无法完成业务数据传输的问题。
在一种可能的实现方式中，上述收发单元还用于，从接入网设备接收第一通信链路的标识信息和第二通信链路的标识信息；上述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：处理单元根据收发单元接收的上述第一通信链路的标识信息和第二通信链路的标识信息，建立第一通信链路和第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路和第二通信链路，由中继UE根据接入网设备确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：上述处理单元通过收发单元从接入网设备接收上述对应关系。本 方案支持由接入网设备确定第一通信链路和第二通信链路，以及根据确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，从接入网设备接收第一对应关系；该第一对应关系是第一通信链路与远程UE的至少两个PC5接口通信链路之间的对应关系；上述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：处理单元从上述至少两个PC5接口通信链路中，确定第二通信链路；以及，处理单元建立第一通信链路和第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE的至少两个候选PC5接口通信链路，由中继UE进一步从至少两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，从接入网设备接收第一业务的PC5服务质量QoS参数；从接入网设备接收第二对应关系；该第二对应关系是上述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系；上述处理单元从上述至少两个PC5接口通信链路中，确定第二通信链路，包括：处理单元根据第一业务的PC5QoS参数，第一对应关系和第二对应关系，从上述至少两个PC5接口通信链路中确定第二通信链路。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE的至少两个候选PC5接口通信链路，由中继UE根据第一业务的PC5 QoS参数、第一通信链路与远程UE的至少两个PC5接口通信链路之间的对应关系以及上述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系进一步从至少两个候选PC5接口通信链路中确定最终的第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一业务的PC5 QoS参数包括以下参数中的一种或多种：PC5接口的资源类型、PC5接口的调度优先级、PC5接口的时延、PC5接口的丢包率、PC5接口的最大突发流量或PC5接口的时间窗大小；其中，上述PC5接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。本申请中的业务对接口参数的要求包括但不限于资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小中的至少一种。
在一种可能的实现方式中，上述收发单元还用于，接收第一业务的PC5 QoS参数；以及，从接入网设备接收所述第一通信链路的标识信息；上述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：处理单元根据第一业务的PC5 QoS参数，确定第二通信链路；以及，处理单元建立第一通信链路和所述第二通信链路之间的对应关系。本方案支持由接入网设备确定第一通信链路，由中继UE根据第一业务的PC5QoS参数确定第二通信链路，从而建立第一通信链路和所述第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，从远程UE接收第二通信链路的配置信息；从接入网设接收第一通信链路的标识信息；上述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：处理单元根据第二通信链路的配置信息和第一通信链路的标识信息，建立第一通信链路和第二通信链路之间的对应关系。本 方案支持由接入网设备确定第一通信链路，由远程UE确定第二通信链路，最后由中继UE建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一通信链路是数据无线承载DRB，第二通信链路是侧链路无线承载SLRB。
第四方面，提供一种接入网设备，该接入网设备包括：收发单元，用于接收第一业务的Uu QoS需求信息；处理单元，用于根据第一业务的Uu QoS需求信息，确定通过在接入网设备与中继UE之间的第一通信链路传输第一业务的数据；以及，根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定第二通信链路；该第二通信链路用于在中继UE与远程UE之间传输第一业务的数据；上述收发单元还用于，向中继用户设备UE发送通信链路信息，该通信链路信息用于表征或建立第一通信链路与第二通信链路之间的对应关系；其中，上述第一Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第一业务的数据，第一PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第一业务的数据。
上述第四方面提供的技术方案，接入网设备通过根据第一业务的Uu QoS需求信息确定用于在接入网设备和中继UE之间传输第一业务的数据的第一通信链路，以及根据第一业务的Uu QoS参数与PC5 QoS参数的对应关系，结合第一业务的Uu QoS需求信息确定用于在远程UE和中继UE之间传输第一业务的数据的第二通信链路。通过这样的方案，可以解决常规技术中第一通信链路(如DRB)和第二通信链路(如SLRB)不匹配导致的无法完成业务数据传输的问题。
在一种可能的实现方式中，上述通信链路信息包括第一通信链路与第二通信链路之间的对应关系；或者，通信链路信息包括第一通信链路的标识信息和第二通信链路的标识信息。本方案支持由接入网设备确定第一通信链路和第二通信链路，由中继UE根据接入网设备确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。或者，由接入网设备确定第一通信链路和第二通信链路，以及根据确定的第一通信链路和第二通信链路建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，接收第二业务的Uu QoS需求信息；上述处理单元还用于，根据上述第二业务的Uu QoS需求信息，确定通过第一通信链路传输第二业务的数据；以及，根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及第二业务的Uu QoS需求信息，确定第三通信链路；该第三通信链路用于中继UE与远程UE之间传输第二业务的数据；其中，上述通信链路信息包括第一通信链路，与远程UE的至少两个PC5接口通信链路之间的对应关系，上述至少两个PC5接口通信链路包括第二通信链路和第三通信链路；第二Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第二业务的数据，第二PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第二业务的数据。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE不同业务对应的两个候选PC5接口通信链路，由中继UE进一步从上述两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，接收第三业务的Uu QoS需求 信息；上述处理单元还用于，根据第三业务的Uu QoS需求信息，确定通过第一通信链路传输第三业务的数据；以及，根据第三Uu QoS参数与第三PC5 QoS参数的对应关系，以及第三业务的Uu QoS需求信息，确定用于所述中继UE与所述远程UE之间传输所述第三业务的数据的第四通信链路；其中，上述至少两个PC5接口通信链路还包括第四通信链路；第三Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第三业务的数据，第三PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第三业务的数据。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的远程UE不同业务对应的至少两个候选PC5接口通信链路，由中继UE进一步从至少两个候选PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述收发单元还用于，接收第二远程UE的第四业务的Uu QoS需求信息；上述处理单元还用于，根据第四业务的Uu QoS需求信息，确定通过第一通信链路传输第四业务的数据；以及，根据第四Uu QoS参数与第四PC5 QoS参数的对应关系，以及第四业务的Uu QoS需求信息，确定用于所述中继UE与所述第二远程UE之间传输所述第四业务的数据的第五通信链路；接入网设备向中继UE发送第一通信链路与第二远程UE的第五通信链路之间的对应关系；第四Uu QoS参数用于通过所述中继UE与接入网设备之间的Uu接口传输第四业务的数据，第四PC5 QoS参数用于通过中继UE与第二远程UE之间的PC5接口传输第四业务的数据；通信链路信息还包括第一远程UE的标识信息和第二远程UE的标识信息。本方案支持由接入网设备确定第一通信链路和与该第一通信链路对应的不同远程UE的不同业务对应的两个PC5接口通信链路，由中继UE进一步从上述两个PC5接口通信链路中最终确定第二通信链路，从而建立第一通信链路和第二通信链路之间的对应关系。
在一种可能的实现方式中，上述第一业务的Uu QoS需求信息包括以下一种或多种：Uu接口的资源类型、Uu接口的调度优先级、Uu接口的时延、Uu接口的丢包率、Uu接口的最大突发流量或Uu接口的时间窗大小；其中，Uu接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。本申请中的业务对接口参数的要求包括但不限于资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小中的至少一种。
在一种可能的实现方式中，上述收发单元还用于，通过协议数据单元PDU会话接收来自会话管理功能SMF网元的第一业务的Uu QoS需求信息。
在一种可能的实现方式中，上述收发单元还用于，接收来自PCF网元的第一Uu QoS参数与第一PC5 QoS参数的对应关系。本方案支持由PCF网元进行第一Uu QoS参数与第一PC5 QoS参数的对应关系的管理。
第五方面，提供一种中继UE，该中继UE包括：存储器，用于存储计算机程序；处理器，用于执行上述计算机程序，以实现第一方面任一种可能的实现方式中的临近服务的数据传输方法。
第六方面，提供一种接入网设备，该接入网设备包括：存储器，用于存储计算机程序；处理器，用于执行上述计算机程序，以实现第二方面任一种可能的实现方式中的临近服务的数据传输方法。
第七方面，提供一种通信系统，该通信系统包括如第三方面或第五方面任一种可能的实现方式中的中继UE；和如第四方面或第六方面任一种可能的实现方式中的接入网设备。
在一种可能的实现方式中，该通信系统还包括以下一种或多种：PCF网元、远程UE、SMF网元或AMF网元。
第八方面，提供一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序代码，该计算机程序代码被处理器执行时实现如第一方面或第二方面任一种可能的实现方式中的临近服务的数据传输方法。
第九方面，提供一种一种芯片系统，该芯片系统包括处理器、存储器，存储器中存储有计算机程序代码；所述计算机程序代码被所述处理器执行时，实现如第一方面或第二方面任一种可能的实现方式中的临近服务的数据传输方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十方面，提供一种计算机程序产品，当其在计算机上运行时，使得实现如第一方面或第二方面任一种可能的实现方式中的临近服务的数据传输方法。
附图说明
图1为一种5G通信系统的ProSe架构示例图；
图2为一种数据链路层数据处理示意图；
图3为一种中继UE数据链路层的用户面协议栈结构图；
图4为一种通信网络架构图；
图5为本申请实施例提供的一种远程UE或中继UE的硬件结构示意图；
图6为本申请实施例提供的一种网络设备的硬件结构示意图；
图7为本申请实施例提供的一种临近服务的数据传输方法流程图；
图8为本申请实施例提供的临近服务的数据传输方法交互图一；
图9为本申请实施例提供的临近服务的数据传输方法交互图二；
图10为本申请实施例提供的临近服务的数据传输方法交互图三；
图11为本申请实施例提供的临近服务的数据传输方法交互图四；
图12为本申请实施例提供的临近服务的数据传输方法交互图五；
图13为本申请实施例提供的临近服务的数据传输方法交互图六；
图14为本申请实施例提供的一种UE的结构框图；
图15为本申请实施例提供的一种网络设备的结构框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例可以适用但不限于以下通信系统：窄带物联网(narrow band-internet of things，NB-IoT)系统、无线局域网(wireless local access network，WLAN)系统、长期演进(long term evolution，LTE)系统、第五代移动通信(5th generation mobile networks or 5th generation wireless systems，5G)也称为新空口(new radio，NR)系统、或者5G之后的通信系统，例如6G系统、设备到设备(device to device，D2D)通信系统、车联网等。
图4示出了一种通信网络架构图。其中，图4以5G系统的网络服务架构为例， 展示了网络功能和实体之间的交互关系以及对应的接口，该网络架构是基于服务的网络架构(service-based architecture，SBA)。
如图4所示，5G系统包含的网络功能和实体主要包括：UE、接入网(access network，AN)或无线接入网(radio access network，RAN)、用户面功能(user plane function，UPF)、数据网络(data network，DN)、接入与移动管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、认证服务功能(authentication server function，AUSF)、策略控制功能(policy control function，PCF)、应用功能(application function，AF)、网络切片选择功能(network slice selection function，NSSF)、统一数据管理(unified data management，UDM)、网络开放功能(network exposure function，NEF)和网络存储功能(network repository function，NRF)。
需要说明的是，当UE通过中继设备连接到网络时，该UE可以被称为“远程UE”。其中，中继设备是可以为远程UE提供接入到蜂窝网络的设备，可以是中继站或者UE等设备，在UE充当远程UE的中继设备的情况下，该UE必然支持PC5接口通信，该中继设备可以被称为“中继UE”，表明该中继设备位于移动网络覆盖范围内，例如，该中继设备可以正常接入5G系统的接入网。
如图4所示，远程UE通过中继UE连接至接入网设备和核心网设备。其中，远程UE和中继UE之间的接口为PC5接口，中继UE和AN/RAN之间的接口为Uu接口，远程UE/中继UE和AMF之间的接口点为N1接口，AN/RAN和AMF之间的接口为N2接口，AN/RAN和UPF之间的接口为N3接口，SMF和UPF之间的接口为N4接口，UPF为DN之间的接口为N6接口；Namf为AMF展现的基于服务的接口，Nsmf为SMF展现的基于服务的接口，Nausf为AUSF展现的基于服务的接口，Nnssf为NSSF展现的基于服务的接口，Nnef为NEF展现的基于服务的接口，Nnrf为NRF展现的基于服务的接口，Npcf为PCF展现的基于服务的接口，Nudm为UDM展现的基于服务的接口，Naf为AF展现的基于服务的接口。
下面对各个网元的主要功能做具体介绍。
AN/RAN：AN/RAN可以由AN/RAN设备构成。AN/RAN设备可以是各种形式的基站，例如：宏基站，微基站(也称为“小站”)，分散单元-控制单元(distribute unit-control unit，DU-CU)等，其中，DU-CU是一种部署在无线接入网中能够和UE进行无线通信的设备。另外，上述基站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，或者中继站、接入点、车载设备、可穿戴设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的网络设备等。AN/RAN设备也可以是宽带网络业务网关(broadband network gateway，BNG)，汇聚交换机，非3GPP接入设备等。AN/RAN设备主要负责空口侧的无线资源管理、上下行数据分类、服务质量(quality of service，QoS)管理、数据压缩和加密、与控制面网元完成信令处理或与用户面功能网元完成数据转发等功能。本申请实施例对AN/RAN设备的具体形态和结构不做限定。
如，在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同。例如，基站可以是LTE中的演进型通用陆地无线接入网(evolved universal  terrestrial radio access network，E-UTRAN)设备，如演进型节点B(evolutional NodeB，eNB或e-NodeB)，也可以是5G系统中的下一代无线接入网(next generation radio access network，NG-RAN)设备(如gNB)等。
AMF：主要负责控制面消息的处理，例如：接入控制、移动性管理、合法监听、接入鉴权/授权等。例如AMF的功能包括：1)对接入网控制面进行处理；2)对NAS消息进行处理，负责NAS加密和完整性保护；3)注册管理；4)连接管理；5)接入性管理；6)移动性管理；7)合法信息截获；8)在UE与SMF之间提供会话管理消息；9)对于路由的会话管理(session management，SM)消息实现透传，类似透传代理；10)接入鉴权；11)接入授权；12)在UE与短消息服务功能SMSF之间转发SMS消息(短消息)；13)与AUSF和UE交互，获得UE鉴权中间密钥；14)计算接入网络的特定密钥。
SMF：主要用于会话管理，UE的网络互连协议(internet protocol，IP)地址分配和管理，选择可管理用户平面功能，策略控制和收费功能接口的终结点，下行数据通知等。例如，SMF的功能包括：1)会话管理，会话建立，修改和释放，包括对于UPF与AN节点之间的通道维护；2)UE IP地址分配和管理；3)选择并且控制用户面功能；4)在UPF上配置正确业务路由；5)策略控制功能的落地执行；6)策略执行与QoS的控制部分；7)合法截获；8)处理NAS消息中的会话管理部分；9)下行数据指示；10)发起接入网的特定会话管理信息(通过AMF路由)；11)决定会话中与服务连续性的模式；12)漫游功能。
PCF：主要用于向UE，AMF或SMF分别提供UE策略规则，接入管理(access management，AM)策略规则以及SM策略规则相关的参数，管理用户订阅信息，对接UDM以访问与策略决策相关的订阅用户信息等。PCF一般根据签约信息等进行策略的决策。
AF：用于提供服务，主要用于：1)对于业务路由的应用影响；2)访问网络能力曝光；3)与策略框架交互进行策略管控。
另外，对于UPF、DN、AUSF、NSSF、NEF、NRF和UDM的功能等的介绍，可以参考常规技术中的解释和说明，这里不做赘述。
远程UE/中继UE：可以是具有无线连接功能的桌面型设备、膝上型设备、手持型设备、可穿戴设备、智能家居设备、计算设备和车载型设备等。例如，上网本、平板电脑、智能手表、超级移动个人计算机(ultra-mobile personal computer，UMPC)、智能相机、上网本、个人数字助理(personal digital assistant，PDA)、便携式多媒体播放器(portable multimedia player，PMP)、(Augmented Reality，AR)/虚拟现实(Virtual Reality，VR)设备、飞行器上的无线设备、机器人上的无线设备、工业控制中的无线设备、远程医疗中的无线设备、智能电网中的无线设备、智慧城市(smart city)中的无线设备、智慧家庭(smart home)中的无线设备等。或者远程UE/中继UE还可以是窄带(narrow band，NB)技术中的无线设备等。
此外，远程UE/中继UE还可以指接入终端、用户单元、用户站、移动站、移动台、中继站、远方站、远程终端、移动设备、用户终端(user terminal)、终端(terminal)、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话 启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(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、可穿戴设备，未来5G网络中的终端设备或者未来演进的PLMN中的终端设备或者未来车联网中的终端设备等。
此外，远程UE/中继UE还可以是IoT系统中的终端设备，IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。IOT技术可以通过例如NB技术，做到海量连接，深度覆盖，终端省电。本申请对远程UE/中继UE的具体类型和结构等不作限定。
请参考图5，图5示出了一种UE的硬件结构示意图，该UE可以是中继UE，也可以是远程UE。如图5所示，UE具体可以包括：处理器501、射频电路502、存储器503、触摸屏504、蓝牙装置505、一个或多个传感器506、Wi-Fi装置507、定位装置508、音频电路509、外设接口510、电源装置511、指纹采集器件512、扬声器513和麦克风514等部件。这些部件可通过一根或多根通信总线或信号线(图5中未示出)进行通信。本领域技术人员可以理解，图5中示出的硬件结构并不构成对中继UE或远程UE的限定，中继UE或远程UE均可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图5对中继UE的各个部件进行具体介绍：
处理器501可以是中继UE的控制中心，利用各种接口和线路连接中继UE的其它各个部分，通过运行或执行存储在存储器503内的计算机程序，例如，应用客户端程序(以下可以简称App)，执行中继UE的各种功能。
在一些实施例中，处理器501可以是一个通用CPU，微处理器，特定ASIC，或一个或多个用于控制本申请方案程序执行的集成电路，处理器501可以包括一个或多个CPU；举例来说，处理器501可以是麒麟芯片。
射频电路502可用于无线信号的接收和发送。特别地，射频电路502可以接收基站的下行数据，发送给处理器501进行处理；另外，射频电路502还可以将上行的数据发送给基站。
通常，射频电路502包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频电路502还可以通过无线通信和其他设备通信。所述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统、通用分组无线服务、码分多址、宽带码分多址、长期演进、电子邮件、短消息服务等。
存储器503用于存储计算机程序，还可以用于存储数据。存储器503可以是只读存储器(read-only memory，ROM)或随机存取存储器(random access memory，RAM)，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器501可以通过运行存储器503存储的计算机程序，执行中继UE的各种功 能以及数据处理。
存储器503可以包括存储程序区以及存储数据区。其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)；存储数据区可以存储根据使用中继UE时所创建的数据(比如音频数据、电话本等)。
其中，存储器503可以存储用于实现模块化功能的计算机程序，并由处理器501来控制执行。处理器501用于执行存储器503中存储的计算机程序，从而实现本申请下述实施例提供的方法。
此外，存储器503可以包括高速随机存取存储器，还可以包括非易失存储器，例如磁盘存储器件、闪存器件或其他易失性固态存储器件等。存储器503可以存储各种操作系统，例如，iOS操作系统，安卓(Android)操作系统等。
中继UE还可以包括至少一个或多个传感器506，比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节触摸屏504的显示器的亮度，接近传感器可在中继UE移动到耳边时，关闭显示器的电源。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别智能手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于中继UE还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路509、扬声器513、麦克风514可提供用户与中继UE之间的音频接口。音频电路509可将接收到的音频数据转换后的电信号，传输到扬声器513，由扬声器513转换为声音信号输出；另一方面，麦克风514将收集的声音信号转换为电信号，由音频电路509接收后转换为音频数据，再将音频数据输出至射频电路502以发送给比如另一UE，或者将音频数据输出至存储器503以便进一步处理。
尽管图5未示出，中继UE还可以包括摄像头(前置摄像头和/或后置摄像头)、闪光灯、微型投影装置、近场通信(near-field communication，NFC)装置等，在此不再赘述。
应理解，上述图5所示中继UE包括的硬件模块只是示例性地描述，并不对本申请构成限定。事实上，本申请实施例提供的远程UE和中继UE中还可以包含其他与图中示意的硬件模块具有交互关系的其他硬件模块，这里不作具体限定。
需要说明的是，本申请中的AN/RAN设备可以是基站。例如，基站可以是Ng-eNB、gNB或传输接收点(trasmission/reception point，TRP)。还可以是3GPP所定义的基站。例如，eNB或e-NodeB等。
此外，当eNB接入NR的核心网或者下一代核心网(next genaeration core，NGC)或者5G核心网(5th generation core network，5GC)时，eNB也可以称为eLTE eNB。具体地，eLTE eNB是在eNB的基础上演进的LTE基站设备，可以直接连接5G CN，eLTE eNB也属于NR中的基站设备。
或者，AN/RAN设备还可以是无线端点(wireless terminal，WT)。例如接入点(access point，AP)或者接入控制器(access controller，AC)，或者其他具有与UE、及核心网有通信能力的网络设备。例如，中继设备、车载设备、智能穿戴设备等。本申请对 AN/RAN设备的类型不做限定。
请参考图6，图6示出了一种网络设备的硬件结构示意图。其中，该网络设备600可以是图1或图3所示的无线接入网中的AN/RAN设备，或者图4所示的AN/RAN中的AN/RAN设备，也可以是图4所示的AMF、SMF或PCF等核心网网元。如图6所示，网络设备600可以包括处理器601，通信线路602，存储器603以及至少一个通信接口(图6中仅是示例性的以包括通信接口604为例进行说明)。
处理器601可以包括一个或多个处理器，其中，处理器可以为CPU，微处理器，特定ASIC，或其它集成电路，不予限制。
通信线路602可包括一通路，用于在上述组件之间传送信息。
通信接口604，用于与其他设备或通信网络通信。
存储器603可以是ROM或RAM，或者EEPROM、CD-ROM，或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
需要说明的是，存储器可以是独立存在，通过通信线路602与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器603用于存储计算机程序。处理器601用于执行存储器603中存储的计算机程序，从而实现本申请下述任一方法实施例提供的相关网元的方法。
需要说明的是，处理器601可以包括一个或多个CPU，例如图6中的CPU0和CPU1。此外，图6仅作为一种网络设备的示例，并不对网络设备的具体结构做出限定。例如，网络设备还可以包括其他功能模块。
本申请实施例提供了一种临近服务的数据传输方法，该方法为了满足应用对QoS多样化的要求的问题，基于QoS流进行QoS需求管控，通过Uu QoS参数到PC5 QoS参数的映射，以实现Uu接口通信链路(如DRB)与PC5接口通信链路(如SLRB)的确定，从而解决常规技术中Uu接口通信链路与PC5接口通信链路的QoS参数不匹配导致的无法完成业务数据传输的问题。
以下结合附图对本申请实施例提供的临近服务的数据传输方法进行具体介绍：
图7示出了本申请实施例提供的一种临近服务的数据传输方法，该方法可以基于前述架构，具体如下所述。
S701、中继UE获取第一通信链路和第二通信链路之间的对应关系。
其中，第一通信链路可以是Uu接口通信链路，Uu接口通信链路指的是中继UE与接入网设备之间通过Uu接口建立的通信链路，可以用于在中继UE与接入网设备之间传输第一业务的数据。例如，第一通信链路可以是数据无线承载(data radio bearer，DRB)。DRB用于在中继UE与接入网设备之间传输第一业务的数据。
其中，第二通信链路可以是PC5接口通信链路，用于在中继UE与远程UE之间传输第一业务的数据。例如，第二通信链路可以是侧链路无线承载(sidelink radio bearer，SLRB)。
需要指出的是，关于DRB和SLRB的具体介绍，可以参考常规技术中的解释和说明，这里不做赘述。
其中，第一业务可以是远程UE希望或即将使用中继UE传输的业务。该第一业务可以是某一个具体的业务，例如，视频业务，语音业务，彩铃业务，文字传输业务等；也可以是某一个类型的业务，例如，网络切片业务，即时通信业务，生活服务业务等。
其中，S701可以采用如下方式来实现。
方式一、中继UE直接从接入网设备接收第一通信链路和第二通信链路之间的对应关系。
需要说明的是，该对应关系可以是显式的，也可以是隐式的，例如，同一条消息中携带第一通信链路的标识信息和第二通信链路的标识信息。
方式二、中继UE从接入网设备接收第一通信链路的标识信息和第二通信链路的标识信息，然后根据第一通信链路的标识信息和第二通信链路的标识信息建立第一通信链路和第二通信链路之间的对应关系。
例如，中继UE可以从接入网设备接收第一通信链路的配置信息和第二通信链路的配置信息，该第一通信链路的配置信息中包括第一通信链路的标识信息，该第二通信链路的配置信息中包括第二通信链路的标识信息。
其中，第一通信链路的标识信息用于标识第一通信链路，例如，第一通信链路是第一DRB，第一通信链路的标识信息是第一DRB的ID(Identity)。第二通信链路的标识信息用于标识第二通信链路，例如，第二通信链路是第一SLRB，第二通信链路的标识信息是第一SLRB的ID。
方式三、中继UE从接入网设备接收第一通信链路与至少两个PC5接口通信链路之间的对应关系，然后从接收到的至少两个PC5接口通信链路中选择得到第二通信链路，并建立第一通信链路和第二通信链路之间的对应关系。
其中，中继UE可以根据至少两个PC5接口通信链路被占用的情况(如占用率)从接收到的至少两个PC5接口通信链路中选择得到第二通信链路；中继UE也可以根据接收到的至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系，以及第一业务的PC5 QoS参数。从接收到的至少两个PC5接口通信链路中选择得到第二通信链路。
其中，第一业务的PC5 QoS参数包括以下参数中的一种或多种：PC5接口的资源类型、PC5接口的调度优先级、PC5接口的时延、PC5接口的丢包率、PC5接口的最大突发流量或PC5接口的时间窗大小。
其中，PC5接口的资源类型包括以下一种或多种：保证比特速率(guaranteed bit rate，GBR)类型、非保证比特速率Non-GBR类型和时延临界保证比特速率(delay critical guaranteed bit rate，Delay-critical GBR)类型。GBR类型是指即使在网络资源紧张的情况下，相应的比特速率也能够保持。Non-GBR类型是指网络不提供最低的传输速率保证，也就是说，在网络拥挤的情况下，业务需要承受降低速率的要求。Delay-critical GBR是指对于超过规定时延限制的业务数据作丢包处理，并计入丢包率的统计中；对于未超过规定时延限制的业务数据，正常传输。Uu接口的调度优先级定义了业务的重要性，在系统资源受限时，Uu接口的调度优先级决定了QoS流是被Uu接口接受还是拒绝。Uu接口的时延定义了业务对传输时延的要求。Uu接口的丢包率定义了业务对丢包率的要求。例如，语音、视频通话、物联网、车联网等工业控制类的时延敏感性 业务，通常对传输速率、时延和丢包率有较高要求。Uu接口的最大突发流量定义了业务对最大突发流量的要求。Uu接口的时间窗大小定义了业务对时间窗大小的要求。
方式四、中继UE根据接收到的第一业务的PC5 QoS参数确定第二通信链路，以及从接入网设备接收第一通信链路的标识信息，然后建立第一通信链路和所第二通信链路之间的对应关系。
例如，中继UE可以从远程UE接收第一业务的PC5 QoS参数。
方式五、中继UE从接入网设备接收第一通信链路的标识信息，从远程UE接收第二通信链路的标识信息，然后建立第一通信链路和所第二通信链路之间的对应关系。
例如，中继UE可以从远程UE接收第二通信链路的配置信息，该第二通信链路的配置信息中包括第二通信链路的标识信息。
S702、中继UE根据第一通信链路和第二通信链路之间的对应关系，传输远程UE的第一业务的数据。
需要指出的是，本申请涉及的传输可以包括发送和/或接收，不限制传输方向。
示例性地，S702中中继UE可以接收来自远程UE的第一业务的上行数据，并将该第一业务的上行数据发送给接入网设备；中继UE也可以接收来自接入网设备的第一业务的下行数据，并将该第一业务的下行数据发送给远程UE。
例如，在有来自远程UE的第一业务的上行数据通过第二通信链路到达中继UE时，中继UE通过与该第二通信链路有对应关系的第一通信链路将该第一业务的上行数据发送给接入网设备。在有来自接入网设备的第一业务的下行数据通过第一通信链路到达中继UE时，中继UE与该第一通信链路有对应关系的第二通信链路将该第一业务的下行数据发送给远程UE。
在图7所示的实施例中，中继UE通过获取第一通信链路(如DRB)和第二通信链路(如SLRB)之间的对应关系，以便可以根据该对应关系分别在中继UE与接入网设备之间通过第一通信链路，在远程UE与中继UE之间通过第二通信链路传输第一业务的业务数据。通过这样的方案，可以解决常规技术中第一通信链路(如DRB)和第二通信链路(如SLRB)的QoS参数不匹配导致的无法完成业务数据传输的问题。
可选地，在上述实施例的一种实施场景中，在获取第一通信链路和第二通信链路之间的对应关系之前，上述方法还包括：确定第一通信链路和第二通信链路。
具体地，可以通过以下三种方式确定第一通信链路和第二通信链路：
方式(1)、接入网设备确定第一通信链路和第二通信链路。
在一种实现方式中，接入网设备可以根据第一业务的Uu QoS需求信息，确定通过接入网设备与中继UE之间的第一通信链路传输第一业务的数据，并根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定第二通信链路。
其中，第一业务的Uu QoS需求信息是指第一业务对Uu接口的QoS配置需求。第一业务的Uu QoS需求信息至少包括第一业务对Uu接口的下参数中的一种或多种：Uu接口的资源类型、Uu接口的调度优先级、Uu接口的时延、Uu接口的丢包率、Uu接口的最大突发流量或Uu接口的时间窗大小。
其中，Uu接口的资源类型可以包括以下一种或多种：GBR类型、Non-GBR类型 和Delay-critical GBR类型。例如，本申请实施例中的第一业务的Uu QoS需求信息可以由接入网设备通过PDU会话从SMF网元接收。第一Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第一业务的数据；第一PC5 QoS参数用于通过中继UE与远程UE之间的PC5接口传输第一业务的数据。
例如，在本申请实施例中，接入网设备可以从接入网设备可以使用的多个Uu接口通信链路中，选择最能满足第一业务对Uu接口的资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小等一个或多个QoS参数需求的一个Uu接口通信链路(如第一通信链路)，进行接入网设备和中继UE之间的第一业务的业务数据的传输。以及，在接入网设备确定第一通信链路之后，接入网设备可以确定与第一通信链路能够满足的Uu QoS参数(如第一Uu QoS参数)对应的PC5 QoS参数(如第一PC5 QoS参数)，从而从中继UE可以使用的多个PC5接口通信链路中，选择能够满足第一PC5 QoS参数的一个PC5接口通信链路(如第二通信链路)。需要说明的是，方式(1)具体可以参看图8或图9所示实施例中的相关描述，不再赘述。
方式(2)、接入网设备确定第一通信链路，并将第一通信链路的信息告知中继UE。中继UE根据候选PC5接口通信链路确定第二通信链路。
具体地，接入网设备可以根据第一业务的Uu QoS需求信息，确定通过接入网设备与中继UE之间的第一通信链路传输第一业务的数据。
其中，候选PC5接口通信链路可以由接入网设备确定，并将候选PC5接口通信链路的信息通知给中继UE。该候选PC5接口通信链路的信息可以是候选PC5接口通信链路的标识信息，如候选PC5接口通信链路的ID。
在一个示例中，接入网设备可以根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及远程UE的至少两个业务(如第一业务，第二业务和第三业务)的Uu QoS需求信息，确定远程UE的至少两个PC5接口通信链路(即候选PC5接口通信链路)，并将该至少两个PC5接口通信链路的标识信息告知中继UE，用于中继UE从中选择第二通信链路。
其中，第一Uu QoS参数与第一PC5 QoS参数的对应关系可以由接入网设备从PCF网元获取。
在另一个示例中，接入网设备可以根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及不同远程UE(如远程UE 1，远程UE 2和远程UE 3)的具有相同或相似QoS需求的业务的Uu QoS需求信息，确定至少两个PC5接口通信链路(即候选PC5接口通信链路)，用于中继UE从中选择第二通信链路。
需要说明的是，方式(2)具体可以参看图10或图11所示实施例中的相关描述，不再赘述。
方式(3)、接入网设备确定第一通信链路，并将第一通信链路的信息告知中继UE。远程UE或中继UE根据第一业务的PC5 QoS参数确定第二通信链路。
例如，接入网设备可以根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定第一通信链路。
其中，第一通信链路的信息可以是第一通信链路的标识信息或者第一通信链路的配置信息。
需要说明的是，方式(3)具体可以参看图12或图13所示实施例中的相关描述，不再赘述。
可选地，在上述实施例的另一种实施场景中，上述方法还包括：远程UE确定使用中继UE传输第一业务。
在一个示例中，远程UE可以根据远程UE的能力信息、第一业务的签约信息或远程UE的签约信息等中的一个或多个确定使用中继UE传输第一业务。例如，远程UE在有第一业务传输需求时，根据远程UE支持中继方式传输业务的能力信息以及允许采用中继方式传输第一业务的签约信息确定使用中继UE传输第一业务。
图8和图9所示实施例以第一通信链路是第一DRB，第二通信链路是第一SLRB为例进行描述。
请参考图8，本申请实施例提供的一种临近服务的数据传输方法，具体如下所述。
S801、接入网设备接收第一业务的Uu QoS需求信息。
其中，第一业务可以是远程UE希望或即将使用中继UE传输的业务。该第一业务可以是某一个具体的业务，例如，视频业务，语音业务，彩铃业务，文字传输业务等；也可以是某一个类型的业务，例如，网络切片业务，即时通信业务，生活服务业务等。
其中，第一业务的Uu QoS需求信息可以指第一业务对Uu接口的QoS配置需求。
其中，第一业务的Uu QoS需求信息可以包括第一业务对Uu接口的下参数中的一种或多种：Uu接口的资源类型、Uu接口的调度优先级、Uu接口的时延、Uu接口的丢包率、Uu接口的最大突发流量或Uu接口的时间窗大小。Uu接口的资源类型可以包括以下一种或多种：GBR类型、Non-GBR类型和时延临界保证比特速率(delay critical guaranteed bit rate，Delay-critical GBR)类型。
具体地，第一业务的Uu QoS需求信息可以用5G QoS标识(5G QoS Indication，5QI)来表示。表1示出了5QI与Uu QoS参数的一种映射关系。
表1
Figure PCTCN2021083601-appb-000001
Figure PCTCN2021083601-appb-000002
或者，第一业务的Uu QoS需求信息还可以以其他形式来表示，本申请实施例对Uu QoS需求信息的具体表现形式不作具体限定。
S802、接入网设备根据第一业务的Uu QoS需求信息，确定通过第一DRB传输第一业务的数据。
其中，第一DRB可以满足第一业务对Uu接口的QoS配置需求，例如，该QoS配置需求可以包括对Uu接口的资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小等QoS参数的配置需求。
可以理解，中继UE与接入网设备之间可以通过多条通信链路(如多个DRB)进行业务数据传输。不同的通信链路可以是不同的资源类型，可以达到不同的调度优先级、时延、丢包率、最大突发流量或可以使用不同大小的时间窗。接入网设备可以根据第一业务的Uu QoS需求信息，从中继UE与接入网设备之间的上述多个DRB中，选择一个能够满足第一业务的Uu QoS配置需求的DRB，如第一DRB。
S803、接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定第一SLRB。
其中，第一SLRB可以用于在中继UE与远程UE之间传输第一业务的数据。
第一Uu QoS参数可以用于通过中继UE与接入网设备之间的Uu接口传输第一业务的数据。
第一PC5 QoS参数(即第一业务的PC5 QoS参数)可以用于通过中继UE与远程UE之间的PC5接口传输第一业务的数据。
示例性地，接入网设备可以获取并存储的Uu QoS参数与PC5 QoS参数的对应关系可以以5QI与PC5 QoS标识(PC5 QoS Indication，PQI)的对应关系的形式来表示。
需要说明的是，本申请中提及的Uu QoS参数与PC5 QoS参数的对应关系可以包括一个或多个对应关系，每个对应关系为一个或一组Uu QoS参数与一个或一组PC5 QoS参数之间的对应关系。例如，Uu QoS参数与PC5 QoS参数的对应关系包括：5QI＝1对应PQI＝1；5QI＝2对应PQI＝2。
表2示出了PQI与PC5 QoS参数的一种映射关系。
表2
Figure PCTCN2021083601-appb-000003
或者，Uu QoS参数与PC5 QoS参数的对应关系还可以以其他形式来表示，本申请实施例对Uu QoS参数与PC5 QoS参数的对应关系的具体表现形式不作具体限定。
通常，中继UE与远程UE之间可以通过多条通信链路(如多个SLRB)进行业务数据传输。不同的通信链路可以是不同的资源类型，可以达到不同的调度优先级、时延、丢包率、最大突发流量或可以使用不同大小的时间窗。
在一个示例中，接入网设备可以获取并存储Uu QoS参数与PC5 QoS参数的对应关系。进一步地，接入网设备可以根据Uu QoS参数与PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，将第一业务的Uu QoS需求信息对应到PC5 QoS参数。例如，接入网设备从Uu QoS参数与PC5 QoS参数的对应关中，选择最能满足第一业务对Uu接口的资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小等一个或多个QoS参数需求的一个或一组Uu QoS参数，以及确定与该一个或一组Uu QoS参数对应的一个或一组PC5 QoS参数。然后，根据确定的一个或一组PC5 QoS参数，确定能够满足该一个或一组PC5 QoS参数的第一SLRB。该第一SLRB可以满足第一业务对远程UE与中继UE之间的PC5接口的QoS配置需求。
其中，具有对应关系的PC5 QoS参数与Uu QoS参数通常可以满足业务对资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小等QoS参数的配置需求。
例如，远程UE的第一业务的Uu QoS需求信息包括以下参数需求：资源类型为GRB。调度优先级为30，时延要求为不高于50ms，丢包率为不高于10 -3，平均时间窗大小为2000ms。接入网设备中存储的上述Uu QoS参数与PC5 QoS参数的对应关系中，包括能够满足第一业务QoS参数配置需求的第一Uu QoS参数(如5QI＝3)，以及与该第一Uu QoS参数匹配的第一PC5 QoS参数(如PQI＝3)。其中，第一Uu QoS参数可以满足第一业务对Uu接口的资源类型、Uu接口调度优先级、Uu接口时延、Uu接口丢包率、Uu接口最大突发流量或Uu接口时间窗大小等QoS参数的配置需求。第一PC5 QoS参数可以满足第一业务对PC5接口的资源类型、PC5接口调度优先级、PC5接口时延、PC5接口丢包率、PC5接口最大突发流量或PC5接口时间窗大小等QoS参数的配置需求。
在一个示例中，Uu QoS参数与PC5 QoS参数的对应关系可以预先保存在接入网设备中。
在另一个示例中，Uu QoS参数与PC5 QoS参数的对应关系还可以由PCF创建并维护。接入网设备可以通过AMF网元从PCF网元获取Uu QoS参数与PC5 QoS参数的对应关系。
例如，接入网设备可以通过图8中所示的步骤S800-1和S800-2获取Uu QoS参数与PC5 QoS参数的对应关系：
S800-1、PCF网元向AMF网元发送Uu QoS参数与PC5 QoS参数的对应关系。相应的，AMF网元从PCF网元接收Uu QoS参数与PC5 QoS参数的对应关系。
其中，PCF网元可以接收网络维护人员的输入维护Uu QoS参数与PC5 QoS参数的对应关系。或者，PCF网元也可以自行生成并维护Uu QoS参数与PC5 QoS参数的对应关系，例如PCF网元根据业务的签约数据以及远程UE、中继UE的传输能力等生成Uu QoS参数与PC5 QoS参数的对应关系。或者，PCF网元还可以通过其他方式获取Uu QoS参数与PC5 QoS参数的对应关系，本申请实施例对Uu QoS参数与PC5 QoS参数的对应关系的生成方式不作具体限定。
S800-2、AMF网元向接入网设备发送Uu QoS参数与PC5 QoS参数的对应关系。
相应的，接入网设备从AMF网元接收Uu QoS参数与PC5 QoS参数的对应关系。
示例性地，在远程UE向AMF网元注册的过程中，远程UE在注册请求消息中携带用于指示该远程UE支持使用PC5接口进行直接通信的能力信息，AMF网元可以根据该能力信息确定向接入网设备发送Uu QoS参数与PC5 QoS参数的对应关系。
另外，AMF网元还可以向接入网设备发送第一业务的Uu QoS需求信息。进一步的，AMF网元还可以向接入网设备转发SMF网元为QoS流分配的QFI。其中，第一业务的Uu QoS需求信息和QFI可以由AMF网元发送Uu QoS参数与PC5 QoS参数的对应关系时一同发送给接入网设备，也可以由AMF网元单独发送给接入网设备，本申请实施例对此不作限定。
在一些实施例中，AMF网元还可以向接入网设备发送远程UE进行ProSe通信时可以使用的PLMN列表，远程UE在网络覆盖外可以使用的无线频段信息，QoS需求信息映射到PQI的规则或标准化的PQI等中的一项或多项。
需要说明的是，AMF网元既可以在远程UE向AMF网元注册过程中向接入网设备发送Uu QoS参数与PC5 QoS参数的对应关系，也可以在远程UE的其他流程中发送给接入网设备，例如服务请求流程、PDU会话建立流程或者PDU会话恢复流程，本申请不限定。
S804、接入网设备向中继UE发送第一通信链路信息。
其中，该第一通信链路信息可以用于表征第一DRB与第一SLRB之间的对应关系。
相应地，中继UE从接入网设备接收第一通信链路信息。
其中，第一DRB用于在中继UE与接入网设备之间传输第一业务的数据，第一SLRB用于在中继UE与远程UE之间传输第一业务的数据。第一DRB与第一SLRB之间的对应关系由接入网设备建立。可以理解，接入网设备获取了第一DRB、第一SLRB和QFI，就可以为QFI对应的业务数据建立第一DRB与第一SLRB之间的对应 关系，用于通过第一DRB与第一SLRB构成的传输通道传输该业务的业务数据。
S805、中继UE向远程UE发送第一SLRB的配置信息。
相应的，远程UE从中继UE接收第一SLRB的配置信息。
在本申请实施例中，中继UE可以将第一SLRB的配置信息通过PC5接口发送给远程UE。其中，第一SLRB的配置信息用于远程UE使用该第一SLRB与中继UE之间传输第一业务的数据。
其中，第一SLRB的配置信息可以包括以下一种或多种：第一SLRB的标识信息、PC5接口协议栈中RLC层的配置信息或PC5接口协议栈中MAC层的配置信息。
其中，第一SLRB的标识信息可以用于远程UE确定中继UE与远程UE之间进行PC5通信的PC5接口通信链路。
其中，PC5接口协议栈中RLC层的配置信息和PC5接口协议栈中MAC层的配置信息可以用于远程UE与中继UE统一RLC层和MAC层对数据的处理方式，例如，统一对数据包的分割与重组方式、统一数据包的重传方式等。
S806、中继UE传输远程UE的第一业务的数据。
其中，本申请涉及的传输可以包括发送和/或接收，不限制传输方向。
例如，在有来自远程UE的第一业务的上行数据通过第一SLRB到达中继UE时(如图8中的S806-a所示)，中继UE可以根据第一通信链路信息表征的第一DRB与第一SLRB之间的对应关系，确定通过与第一SLRB对应的第一DRB向接入网设备发送第一业务的上行数据(如图8中的S806-b所示)。
在有来自接入网设备的第一业务的下行数据通过第一DRB到达中继UE时(如图8中的S806-b所示)，中继UE可以根据第一通信链路信息表征的第一DRB与第一SLRB之间的对应关系，确定通过与第一DRB对应的第一SLRB向远程UE发送第一业务的下行数据(如图8中的S806-a所示)。
可选地，在另一个实施例中，如图9所示，该实施例提供的方法可以基于图8所示的方法，并将S804替换为S901和S902：
S901、接入网设备向中继UE发送第二通信链路信息。
S902、中继UE根据第二通信链路信息建立第一DRB与第一SLRB之间的对应关系。
在一个示例中，该第二通信链路信息包括第一DRB的标识信息和第一SLRB的标识信息。例如，第二通信链路信息包括第一DRB的配置信息和第一SLRB的配置信息。其中，第一DRB的配置信息可以包括以下一种或多种：第一DRB的标识信息、Uu接口协议栈中RLC层的配置信息或Uu接口协议栈中MAC层的配置信息。第一SLRB的配置信息可以包括以下一种或多种：第一SLRB的标识信息、PC5接口协议栈中RLC层的配置信息或PC5接口协议栈中MAC层的配置信息。其中，第一DRB的标识信息可以是第一DRB的ID，第一SLRB的标识信息可以是第一SLRB的ID。
例如，DRB的标识信息和/或SLRB的标识信息可以用RLC信道的ID来表示，显然，DRB的标识信息或SLRB的标识信息还可以以其他形式来表示，不做限定。
图8或图9所示的实施例中，接入网设备通过根据第一业务的Uu QoS需求信息，以及Uu QoS参数与PC5 QoS参数的对应关系，确定用于在中继UE与接入网设备之 间传输第一业务的业务数据的第一通信链路(即第一DRB)，以及用于在远程UE与中继UE之间传输第一业务的业务数据的第二通信链路(即第一SLRB)，以解决常规技术中Uu接口通信链路与PC5接口通信链路的QoS参数不匹配导致的无法完成业务数据传输的问题。
图10和图11所示实施例以第一通信链路是第一DRB，第二通信链路是第一SLRB为例进行描述，具体如下所述。
图10示出了本申请提供的另一种临近服务的数据传输方法，该方法可以基于图9所示的实施例，且进一步地将S803替换为S1001，S901替换为S1002，S902替换为S1003和S1004，具体如下所述。
S1001、接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，确定远程UE的至少两个PC5接口通信链路。
也就是说，能够满足远程UE(如远程UE 1)的第一业务对远程UE 1与中继UE之间的PC5接口的QoS配置需求的PC5接口通信链路(如SLRB)可以有多条。接入网设备可以根据Uu QoS参数与PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息，将第一业务的Uu QoS需求信息对应到PC5 QoS参数。例如，接入网设备从Uu QoS参数与PC5 QoS参数的对应关中，选择最能满足第一业务对Uu接口的资源类型、调度优先级、时延、丢包率、最大突发流量或时间窗大小等一个或多个QoS参数需求的一个或一组Uu QoS参数，以及确定与该一个或一组Uu QoS参数对应的多个或多组PC5 QoS参数。然后，根据确定的多个或多组PC5 QoS参数，确定能够满足该多个或多组PC5 QoS参数的至少两个PC5接口通信链路。该至少两个PC5接口通信链路均可以满足第一业务对远程UE 1与中继UE之间的PC5接口的QoS配置需求。
S1002、接入网设备向中继UE发送第三通信链路信息。
相应地，中继UE从接入网设备接收第三通信链路信息。
其中，该第三通信链路信息用于表征第一对应关系。第一对应关系是第一DRB与远程UE的至少两个PC5接口通信链路之间的对应关系。
例如，第三通信链路信息可以以表格的形式由接入网设备发送给中继UE，也可以以其他形式发送给中继UE，不进行限定。以下表3仅以一种表格形式进行说明，表格也可以是其他形式，不进行限定。
表3
Figure PCTCN2021083601-appb-000004
其中，表3中的第一DRB是接入网设备确定的用于在接入网设备与中继UE之间传输第一业务的数据的通信链路。第一SLRB、第二SLRB和第三SLRB是接入网设备确定的可以用于中继UE与远程UE 1之间传输第一业务的数据的候选通信链路。表3中的“Uu接口通信链路”与“PC5接口通信链路”之间的对应关系即第一对应关系。
S1003、中继UE从第三通信链路信息表征的远程UE的至少两个PC5接口通信链路中，确定第一SLRB。
在一个示例中，中继UE可以根据从接入网设备获取的远程UE的至少两个PC5接口通信链路被占用的情况(如占用率)，从上述远程UE的至少两个PC5接口通信链路中确定用于传输第一业务的数据的的第二通信链路，如第一SLRB。例如，中继UE可以监听上述远程UE的至少两个PC5接口通信链路的使用情况，从中选择占用率最小的PC5接口通信链路作为第二通信链路。其中，远程UE的至少两个PC5接口通信链路的占用率是指在预设时间段内，中继UE监测到的通信链路的接收功率大于预设功率的时间比。或者，中继UE监测到的通信链路接收到远程UE的信号强度小于预设信号强度的时间比。
S1004、中继UE建立第一DRB和第一SLRB之间的对应关系。
在一个示例中，上述步骤S1002中，接入网设备向中继UE发送第三通信链路信息中包括：第一DRB的标识信息和远程UE的至少两个PC5接口通信链路的标识信息。在这种情况下，中继UE可以从远程UE的至少两个PC5接口通信链路中确定出第一SLRB，并且建立第一DRB和第一SLRB之间的对应关系。
对于图10所示的实施例，在有来自接入网设备的第一业务的下行数据通过第一DRB到达中继UE时，中继UE可以根据接入网设备在第一业务的下行数据包中添加的SLRB标记(如第一SLRB的标识信息)，确定使用哪一个SLRB向远程UE传输该第一业务的下行数据包。在有来自远程UE的第一业务的上行数据到达中继UE时，无论该上行数据包是通过第一SLRB、第二SLRB还是第三SLRB传输至中继UE，中继UE均通过第一DRB将该第一业务的上行数据包传输至接入网设备。
可选的，在另一个示例中，如图11所示，该实施例提供的方法在图10所示方法的基础上，还可以包括步骤S1101-S1102，此外，将S1003替换为S1103，具体如下所述。
S1101、接入网设备向中继UE发送第一业务的PC5 QoS参数。
相应的，中继UE从接入网设备接收第一业务的PC5 QoS参数。
其中，第一业务的PC5 QoS参数可以是接入网设备根据第一业务的Uu QoS需求信息，结合Uu QoS参数与PC5 QoS参数的对应关系确定的。例如，第一业务的PC5 QoS参数可以是Uu QoS参数与PC5 QoS参数的对应关系中，与第一业务的Uu QoS需求信息匹配度最高的PC5 QoS参数。例如，第一业务的Uu QoS需求信息用5QI：3表示，与其匹配度最高的第一业务的PC5 QoS参数可以用PQI：3表示。
S1102、接入网设备向中继UE发送第二对应关系。第二对应关系是第三通信链路信息表征的远程UE的至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系。
相应的，中继UE从接入网设备接收第二对应关系。
在一些实施例中，第二对应关系可以与第一对应关系一起由接入网设备通过第三通信链路信息发送给中继UE。例如，第三通信链路信息可以以表格的形式由接入网设备发送给中继UE。如以下表4所示：
表4
Figure PCTCN2021083601-appb-000005
其中，表4中的第一DRB是接入网设备确定的用于在接入网设备与中继UE之间传输第一业务的数据的通信链路。第一SLRB、第二SLRB和第三SLRB是接入网设备确定的可以用于中继UE与远程UE之间传输第一业务的数据的候选通信链路。PQI：3、PQI：4和PQI：5分别是第一SLRB、第二SLRB和第三SLRB对应的PC5 QoS参数。表4中的“Uu接口通信链路”与“PC5接口通信链路”之间的对应关系即第一对应关系。表4中的“PC5接口通信链路”与“PC5 QoS参数”之间的对应关系即第二对应关系。
S1103、中继UE根据第一业务的PC5 QoS参数，第一对应关系和第二对应关系，从第三通信链路信息表征的远程UE的至少两个PC5接口通信链路中确定第一SLRB。
在一个示例中，中继UE根据第一对应关系可知第一SLRB、第二SLRB和第三SLRB是可以用于中继UE与远程UE之间传输第一业务的数据的候选通信链路，根据第二对应关系可知第一SLRB、第二SLRB和第三SLRB分别可以达到PQI：3、PQI：4和PQI：5对应的PC5 QoS参数需求，而第一业务的PC5 QoS参数为PQI:3，因此，综合上述信息，中继UE可以确定第一SLRB、第二SLRB和第三SLRB中，最能满足第一业务的PC5接口传输需求的是第一SLRB。
我们知道，本申请提供的临近服务的数据传输方法是基于QoS流进行QoS需求管控。在一个示例中，接入网设备在进行QoS流与DRB的映射时，可以将不同的QoS流映射到同一个DRB上。例如，映射到同一个DRB上的QoS流具有部分相近或相同的QoS参数。例如，不同QoS流具有相同的调度优先级，或者相近的时延或丢包率等等。
因此，假设远程UE有第一业务和第二业务传输需求，第一业务和第二业务使用的QoS流不同，但部分QoS参数相近或相同，那么第一业务的QoS流和第二业务的QoS流可以映射到同一DRB上传输。在这种情况下，上述步骤S1002中，接入网设备向中继UE发送的第三通信链路信息可以包括第一对应关系和第二对应关系。其中，第一对应关系是第一DRB与远程UE 1的至少两个PC5接口通信链路(包括第二通信链路(如第一SLRB)和第三通信链路(如第二SLRB))之间的对应关系；第二对应关系是第一对应关系中每一个PC5接口通信链路与PC5 QoS参数之间的对应关系。如以下表5所示：
表5
Figure PCTCN2021083601-appb-000006
上述表5中的第一DRB是接入网设备确定的用于在接入网设备与中继UE之间传输远程UE 1的第一业务和第二业务的数据的Uu接口通信链路。第一DRB是接入网设备根据接收的第一业务的Uu QoS需求信息和第二业务的Uu QoS需求信息确定的。 第一SLRB和第二SLRB是接入网设备确定的分别用于在远程UE 1与中继UE之间传输第一业务和第二业务的数据的PC5接口通信链路。第一SLRB是接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息确定的。第二SLRB是接入网设备根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及第二业务的Uu QoS需求信息确定的。其中，第二Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第二业务的数据，第二PC5 QoS参数用于通过中继UE与远程UE 1之间的PC5接口传输第二业务的数据。关于根据Uu QoS参数与PC5 QoS参数的对应关系，以及业务的Uu QoS需求信息确定SLRB的方法，可以参考上文中的介绍，这里不做赘述。
在这种情况下，中继UE可以根据第三通信链路信息，结合第一业务的PC5 QoS参数，从第一SLRB和第二SLRB中确定能够满足第一业务传输需求的第二通信链路，即第一SLRB。
进一步可选的，若远程UE 1除了上述第一业务和第二业务传输需求，还有第三业务传输需求，第一业务、第二业务和第三业务的QoS需求相同或相似，那么第一业务、第二业务和第三业务可以映射到同一QoS流进行传输。
在这种情况下，上述步骤S1002中，接入网设备向中继UE发送的第三通信链路信息可以包括第一对应关系和第二对应关系。其中，第一对应关系是第一DRB与远程UE 1的至少两个PC5接口通信链路(包括第二通信链路(如第一SLRB)、第三通信链路(如第二SLRB)和第四通信链路(如第三SLRB))之间的对应关系；第二对应关系是第一对应关系中每一个PC5接口通信链路与PC5 QoS参数之间的对应关系。在这种情况下，第一DRB是接入网设备确定的用于在接入网设备与中继UE之间传输远程UE 1的第一业务、第二业务和第三业务的数据的Uu接口通信链路。第一DRB是接入网设备根据接收的第一业务的Uu QoS需求信息、第二业务的Uu QoS需求信息和第三业务的Uu QoS需求信息确定的。第一SLRB、第二SLRB和第三SLRB是接入网设备确定的分别用于在远程UE 1与中继UE之间传输第一业务、第二业务和第三业务的数据的PC5接口通信链路。第一SLRB是接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息确定的。第二SLRB是接入网设备根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及第二业务的Uu QoS需求信息确定的。第三SLRB是接入网设备根据第三Uu QoS参数与第三PC5QoS参数的对应关系，以及第三业务的Uu QoS需求信息确定的。其中，第二Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第二业务的数据，第二PC5 QoS参数用于通过中继UE与远程UE 1之间的PC5接口传输第二业务的数据。第三Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第三业务的数据，第三PC5 QoS参数用于通过中继UE与远程UE 1之间的PC5接口传输第三业务的数据。在这种情况下，中继UE可以根据通信链路信息，结合第一业务的PC5 QoS参数，从第一SLRB、第二SLRB和第三SLRB中确定能够满足第一业务传输需求的第二通信链路，即第一SLRB。在这种情况下，在有来自接入网设备的第一业务的下行数据通过第一DRB到达中继UE时，中继UE可以根据接入网设备在第一业务的下行数据包中添加的PC5 QoS参数信息(如PQI：3)确定使用哪一个SLRB向远程UE传输该第 一业务的下行数据包。例如，PC5 QoS参数信息可以添加在PDCP层往RLC层发送的数据包包头中，或者添加在适应层往RLC层发送的数据包包头中。在有来自远程UE的第一业务的上行数据到达中继UE时，无论该上行数据包是通过第一SLRB、第二SLRB还是第三SLRB传输至中继UE，中继UE均通过第一DRB将该第一业务的上行数据包传输至接入网设备。
在另一个示例中，若远程UE 1和远程UE 2分别有第一业务和第四业务传输需求，第一业务和第四业务的QoS需求相同或相似，那么第一业务和第四业务可以映射到同一QoS流进行传输。
在这种情况下，上述步骤S1002中，接入网设备向中继UE发送的第三通信链路信息可以包括第一DRB与至少两个PC5接口通信链路(包括第二通信链路(如第一SLRB)和第四通信链路(如第五SLRB))之间的对应关系。如以下表6所示：
表6
Figure PCTCN2021083601-appb-000007
其中，表6中的第一DRB是接入网设备确定的用于在接入网设备与中继UE之间传输远程UE 1的第一业务和远程UE 2的第四业务的数据的Uu接口通信链路。第一DRB是接入网设备根据接收的第一业务的Uu QoS需求信息和第四业务的Uu QoS需求信息确定的。第一SLRB是接入网设备确定的分别用于在远程UE 1与中继UE之间传输第一业务的数据的PC5接口通信链路。第一SLRB是接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及第一业务的Uu QoS需求信息确定的。第二SLRB是接入网设备确定的分别用于在远程UE 2与中继UE之间传输第四业务的数据的PC5接口通信链路。第二SLRB是接入网设备根据第四Uu QoS参数与第四PC5QoS参数的对应关系，以及第四业务的Uu QoS需求信息确定的。其中，第四Uu QoS参数用于通过中继UE与接入网设备之间的Uu接口传输第四业务的数据，第四PC5 QoS参数用于通过中继UE与远程UE 1之间的PC5接口传输第四业务的数据。
在这种情况下，中继UE可以根据第三通信链路信息，结合远程UE 1的标识信息，从第一SLRB和第二SLRB中确定能够满足第一业务传输需求的第二通信链路，即第一SLRB。在这种情况下，在有来自接入网设备的第一业务的下行数据通过第一DRB到达中继UE时，中继UE可以根据接入网设备在第一业务的下行数据包中添加的远程UE的标识信息(如远程UE 1)确定使用哪一个SLRB向远程UE传输该第一业务的下行数据包。在有来自远程UE的第一业务的上行数据到达中继UE时，无论该上行数据包是通过第一SLRB还是第二SLRB传输至中继UE，中继UE均通过第一DRB将该第一业务的上行数据包传输至接入网设备。
在一种示例中，接入网设备还可以自行确定第一Uu QoS参数与第一PC5 QoS参数的对应关系。例如，在远程UE通过中继UE接入5GC，建立或更新PDU会话的过程中，接入网设备可以根据AMF网元发送的来自PCF网元的远程UE的第一业务的PC5 QoS参数(即第一PC5 QoS参数)，以及AMF网元发送的第一业务的Uu QoS参数(如第一Uu QoS参数)确定第一Uu QoS参数与第一PC5 QoS参数的对应关系。 例如，接入网设备可以自行将第一PC5 QoS参数与第一Uu QoS参数做映射。
在这种情况下，通常，在远程UE通过中继UE接入5GC，建立或更新PDU会话的过程中，PCF网元可以把第一业务的Uu QoS需求信息通过PCC规则发送给SMF网元。SMF网元根据PCC规则将数据流映射到QoS流上，并将QoS流信息与第一业务的Uu QoS参数通过N2消息发送给接入网设备。接入网设备可以将第一业务的Uu QoS参数与接入网设备通过N1消息接收的AMF转发的来自PCF的多个PC5 QoS参数中的一个PC5 QoS参数做映射。得到第一PC5 QoS参数与第一Uu QoS参数的对应关系。然后，接入网设备可以根据第一PC5 QoS参数与第一Uu QoS参数的对应关系，确定第一DRB和第一SLRB；或者，确定第一DRB和至少两个PC5通信链路等。
可以理解，中继UE与远程UE使用的PC5接口的通信模式可以是自组织的模式或者自主资源调度模式。也就是说PC5接口通信链路可以由中继UE或远程UE在接入网设备(如基站)或核心网设备(例如PCF网元)预配置的无线资源池中选择。其中，无线资源池中包括多个可供中继UE或远程UE选择的SLRB。在这种情况下，如图10、图11、上述表5或表6对应的实施例所述，接入网设备不会为中继UE和远程UE直接分配第一SLRB。
对于图10、图11或上述表5或表6对应的实施例，通过由接入网设备根据第一业务的Uu QoS需求信息确定用于在中继UE与接入网设备之间传输第一业务的业务数据的第一通信链路(即第一DRB)；由接入网设备根据第一业务的Uu QoS需求信息，以及第一Uu QoS参数与第一PC5 QoS参数的对应关系，确定至少两个PC5接口通信链路，以便中继UE可以从中选择最终用于远程UE与中继UE之间输第一业务的业务数据的第二通信链路(即第一SLRB)，以解决常规技术中Uu接口通信链路与PC5接口通信链路的QoS参数不匹配导致的无法完成业务数据传输的问题。
图12和图13所示实施例以第一通信链路是第一DRB，第二通信链路是第一SLRB为例进行描述，具体如下所述。
图12示出了本申请提供的另一种临近服务的数据传输方法，在该实施例中，第一SLRB由中继UE根据第一业务的PC5 QoS参数确定。具体的，该方法可以基于图8所示的实施例，且进一步地将S800-1、S800-2和S801-S804替换为S1202-S1205，具体如下所述。
S1201、AMF网元向远程UE发送来自PCF网元的远程UE的第一业务的PC5 QoS参数。
相应的，远程UE从AMF网元接收第一业务的PC5 QoS参数。
例如，在远程UE通过中继UE接入5GC，建立或更新PDU会话的过程中，PCF网元会把第一业务的PC5 QoS参数发送给AMF网元。AMF网元可以将第一业务的PC5 QoS参数通过接入网设备和中继UE转发给远程UE。
其中，第一业务的PC5 QoS参数包括以下参数中的一种或多种：PC5接口的资源类型、PC5接口的调度优先级、PC5接口的时延、PC5接口的丢包率、PC5接口的最大突发流量或PC5接口的时间窗大小。其中，PC5接口的资源类型包括以下一种或多种：GBR类型、Non-GBR类型和Delay-critical GBR类型。
S1202、远程UE向中继UE发送第一业务的PC5 QoS参数。
相应的，中继UE从远程UE接收第一业务的PC5 QoS参数。
S1203、接入网设备向中继UE发送第一DRB的标识信息。
例如，接入网设备可以向中继UE发送第一DRB的配置信息。该第一DRB的配置信息中包括第一DRB的标识信息。第一DRB的标识信息可以是第一DRB的ID。
相应的，中继UE从接入网设备接收第一DRB的标识信息。
其中，第一DRB可以是接入网设备根据第一业务的Uu QoS需求信息，将第一业务映射到DRB得到的。
S1204、中继UE根据第一业务的PC5 QoS参数，确定第一SLRB。
在一个示例中，中继UE可以根据第一业务的PC5 QoS参数，将第一业务映射到SLRB，得到第一SLRB。或者，中继UE可以根据第一业务的PC5 QoS参数，从无线资源池中选择得到能够与该PC5 QoS参数匹配的SLRB，得到第一SLRB。其中，该无线资源池是接入网设备(如基站)或核心网设备(例如PCF网元)为中继UE预配置的，该无线资源池中包括多个可供中继UE选择的SLRB。
S1205、中继UE根据第一DRB的标识信息和确定的第一SLRB建立第一DRB和第一SLRB之间的对应关系。
可选的，在另一个示例中，第一SLRB可以由远程UE根据第一业务的PC5 QoS参数确定。具体的，该方法可以基于图12所示的实施例，且进一步地将S1202和S1204替换为S1301和S1302，此外，将S1205和S805替换为S1303，参考图13，具体如下所述。
S1301、远程UE根据第一业务的PC5 QoS参数，确定第一SLRB。
在一个示例中，远程UE可以根据第一业务的PC5 QoS参数，将第一业务映射到SLRB，得到第一SLRB。或者，远程UE可以根据第一业务的PC5 QoS参数，从无线资源池中选择得到能够与该PC5 QoS参数匹配的SLRB，得到第一SLRB。其中，该无线资源池是接入网设备(如基站)或核心网设备(例如PCF网元)为远程UE预配置的，该无线资源池中包括多个可供远程UE选择的SLRB。
S1302、远程UE向中继UE发送第一SLRB的配置信息。
相应的，中继UE从远程UE接收第一SLRB的配置信息。
其中，第一SLRB的配置信息至少包括以下一种或多种：第一SLRB的标识信息(如，第一SLRB的ID)、PC5接口协议栈中RLC层的配置信息或PC5接口协议栈中MAC层的配置信息。
S1303、中继UE根据第一DRB的标识信息和第一SLRB的配置信息建立第一DRB和第一SLRB之间的对应关系。
在图12或图13所示的实施例中，通过由接入网设备确定用于在中继UE与接入网设备之间传输第一业务的业务数据的第一通信链路(即第一DRB)，例如根据第一业务的Uu QoS需求信息确定；由中继UE或者远程UE根据第一业务的PC5 QoS参数确定用于远程UE与中继UE之间输第一业务的业务数据的第二通信链路(即第一SLRB)，以解决常规技术中Uu接口通信链路与PC5接口通信链路的QoS参数不匹配导致的无法完成业务数据传输的问题。
应理解，本申请实施例的各个方案可以进行合理的组合使用，并且实施例中出现 的各个术语的解释或说明可以在各个实施例中互相参考或解释，对此不作限定。
还应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
可以理解的是，中继UE，接入网设备，远程UE或其他网络设备(如PCF网元、SMF网元或AMF网元)为了实现上述任一个实施例的功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，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，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。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。
本申请实施例可以对中继UE，接入网设备，远程UE或其他网络设备(如PCF网元、SMF网元或AMF网元)等设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，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。
比如，以采用集成的方式划分各个功能模块的情况下，如图14所示，为本申请实施例提供的一种UE的结构框图。该UE可以为中继UE或远程UE。该UE可以包括收发单元1410和处理单元1420。
其中，在UE为中继UE时，收发单元1410用于支持中继UE执行上述步骤S701、S804、S805、S806(包括S806-a和S806-b)、S901、S1002、S1101、S1102、S1202、S1203或S1302，和/或用于本文所描述的技术的其他过程。处理单元1420用于支持中继UE执行上述步骤S702、S902、S1003、S1004、S1103、S1104、S1204、S1205或S1303，和/或用于本文所描述的技术的其他过程。在UE为远程UE时，收发单元1410用于支持远程UE执行上述步骤S805、S806-a、S1201、S120或S1302，和/或用于本文所描述的技术的其他过程。处理单元1420用于支持远程UE执行上述步骤S1301，和/或用于本文所描述的技术的其他过程。
如图15所示，为本申请实施例提供的一种网络设备的结构框图。该网络设备可以是上述接入网设备、AMF网元、PCF网元或SMF网元等网络设备。该网络设备可以包括收发单元1510和处理单元1520。
其中，在网络设备是接入网设备时，上述收发单元1510可以支持该接入网设备执行上述步骤S800-2、S804、S806-b、S901、S1002、S1101、S1102或S1203，和/或用于本文所描述的技术的其他过程。上述处理单元1520可以支持该接入网设备执行上述步骤S801、S802、S803或S1001，和/或用于本文所描述的技术的其他过程。在网络设备是AMF网元时，上述收发单元1510可以支持该AMF网元执行上述步骤S800-1、S800-2或S1201，和/或用于本文所描述的技术的其他过程。在网络设备是PCF网元时，上述收发单元1510可以支持该PCF网元执行上述步骤S800-1或S1201，和/或用于本文所描述的技术的其他过程。
需要说明的是，上述收发单元1410和收发单元1510可以包括射频电路。UE或网络设备可以通过射频电路进行无线信号的接收和发送。通常，射频电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频电路还可以通过无线通信和其他设备通信。所述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统、通用分组无线服务、码分多址、宽带码分多址、长期演进、电子邮件、短消息服务等。
在一种可选的方式中，当使用软件实现数据传输时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地实现本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如软盘、硬盘、磁带)、光介质(例如DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
结合本申请实施例所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于探测装置中。当然，处理器和存储介质也可以作为分立组件存在于探测装置中。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在一种可选的方式中，本申请提供一种通信系统，该通信系统包括远程UE、中继UE、接入网设备、AMF单元和PCF单元。该通信系统用于实现本申请提供的任一种可能的实现方式中的临近服务的数据传输方法。
在一种可选的方式中，本申请提供一种芯片系统，该芯片系统包括处理器、存储器，存储器中存储有计算机程序代码；当计算机程序代码被处理器执行时，实现本申请提供的任一种可能的实现方式中的临近服务的数据传输方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，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是示意性的，例如，所述模块或 单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)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，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (37)

  1. 一种临近服务的数据传输方法，其特征在于，所述方法包括：
    中继用户设备UE获取第一通信链路和第二通信链路之间的对应关系；所述第一通信链路用于在所述中继UE与接入网设备之间传输第一业务的数据；所述第二通信链路用于在所述中继UE与远程UE之间传输所述第一业务的数据；
    所述中继UE根据所述对应关系，传输所述远程UE的所述第一业务的数据。
  2. 根据权利要求1所述的方法，其特征在于，所述中继用户设备UE获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE从所述接入网设备接收所述第一通信链路的标识信息和所述第二通信链路的标识信息；
    所述中继UE根据所述第一通信链路的标识信息和所述第二通信链路的标识信息，建立所述第一通信链路和所述第二通信链路之间的对应关系。
  3. 根据权利要求1所述的方法，其特征在于，所述中继用户设备UE获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE从所述接入网设备接收所述对应关系。
  4. 根据权利要求1所述的方法，其特征在于，所述中继用户设备UE获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE从所述接入网设备接收第一对应关系；所述第一对应关系是所述第一通信链路与所述远程UE的至少两个PC5接口通信链路之间的对应关系；
    所述中继UE从所述至少两个PC5接口通信链路中，确定所述第二通信链路；
    所述中继UE建立所述第一通信链路和所述第二通信链路之间的对应关系。
  5. 根据权利要求4所述的方法，其特征在于，所述方法还包括：
    所述中继UE从所述接入网设备接收所述第一业务的PC5服务质量QoS参数；
    所述中继UE从所述接入网设备接收第二对应关系；所述第二对应关系是所述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系；
    所述中继UE从所述至少两个PC5接口通信链路中，确定所述第二通信链路，包括：
    所述中继UE根据所述第一业务的PC5 QoS参数，所述第一对应关系和所述第二对应关系，从所述至少两个PC5接口通信链路中确定所述第二通信链路。
  6. 根据权利要求5所述的方法，其特征在于，所述第一业务的PC5 QoS参数包括以下参数中的一种或多种：所述PC5接口的资源类型、所述PC5接口的调度优先级、所述PC5接口的时延、所述PC5接口的丢包率、所述PC5接口的最大突发流量或所述PC5接口的时间窗大小；
    其中，所述PC5接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。
  7. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述中继UE接收所述第一业务的PC5 QoS参数；
    所述中继UE获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE从所述接入网设备接收所述第一通信链路的标识信息；
    所述中继UE根据所述第一业务的PC5 QoS参数，确定所述第二通信链路；
    所述中继UE建立所述第一通信链路和所述第二通信链路之间的对应关系。
  8. 根据权利要求1所述的方法，其特征在于，所述中继用户设备UE获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE从所述远程UE接收所述第二通信链路的配置信息；
    所述中继UE从所述接入网设接收所述第一通信链路的标识信息；
    所述中继UE根据所述第二通信链路的配置信息和所述第一通信链路的标识信息，建立所述第一通信链路和所述第二通信链路之间的对应关系。
  9. 根据权利要求1-7中任一项所述的方法，其特征在于，所述第一通信链路是数据无线承载DRB，所述第二通信链路是侧链路无线承载SLRB。
  10. 一种临近服务的数据传输方法，其特征在于，所述方法包括：
    接入网设备接收第一业务的Uu服务质量QoS需求信息；
    所述接入网设备根据所述第一业务的Uu QoS需求信息，确定通过在所述接入网设备与中继UE之间的第一通信链路传输所述第一业务的数据；
    所述接入网设备根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及所述第一业务的Uu QoS需求信息，确定第二通信链路；所述第二通信链路用于在所述中继UE与远程UE之间传输所述第一业务的数据；
    所述接入网设备向所述中继用户设备UE发送通信链路信息，所述通信链路信息用于表征或建立所述第一通信链路与所述第二通信链路之间的对应关系；
    其中，所述第一Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第一业务的数据，所述第一PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第一业务的数据。
  11. 根据权利要求10所述的方法，其特征在于，所述通信链路信息包括所述第一通信链路与所述第二通信链路之间的对应关系；或者，所述通信链路信息包括所述第一通信链路的标识信息和所述第二通信链路的标识信息。
  12. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收第二业务的Uu QoS需求信息；
    所述接入网设备根据所述第二业务的Uu QoS需求信息，确定通过所述第一通信链路传输所述第二业务的数据；
    所述接入网设备根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及所述第二业务的Uu QoS需求信息，确定第三通信链路；所述第三通信链路用于所述中继UE与所述远程UE之间传输所述第二业务的数据；
    其中，所述通信链路信息包括所述第一通信链路，与所述远程UE的至少两个PC5接口通信链路之间的对应关系，所述至少两个PC5接口通信链路包括所述第二通信链路和所述第三通信链路；所述第二Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第二业务的数据，所述第二PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第二业务的数据。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收第三业务的Uu QoS需求信息；
    所述接入网设备根据所述第三业务的Uu QoS需求信息，确定通过所述第一通信链路传输所述第三业务的数据；
    所述接入网设备根据第三Uu QoS参数与第三PC5 QoS参数的对应关系，以及所述第三业务的Uu QoS需求信息，确定第四通信链路；所述第四通信链路用于所述中继UE与所述远程UE之间传输所述第三业务的数据；
    其中，所述至少两个PC5接口通信链路还包括所述第四通信链路；所述第三Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第三业务的数据，所述第三PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第三业务的数据。
  14. 根据权利要求10-13中任一项所述的方法，其特征在于，所述第一业务的Uu QoS需求信息包括以下一种或多种：所述Uu接口的资源类型、所述Uu接口的调度优先级、所述Uu接口的时延、所述Uu接口的丢包率、所述Uu接口的最大突发流量或所述Uu接口的时间窗大小；
    其中，所述Uu接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。
  15. 根据权利要求10-14中任一项所述的方法，其特征在于，所述方法还包括：
    所述接入网设备通过协议数据单元PDU会话接收来自会话管理功能SMF网元的所述第一业务的Uu QoS需求信息。
  16. 根据权利要求10-15中任一项所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收来自策略和控制功能PCF网元的所述第一Uu QoS参数与第一PC5 QoS参数的对应关系。
  17. 一种中继用户设备UE，其特征在于，所述中继UE包括：
    处理单元，用于获取第一通信链路和第二通信链路之间的对应关系；所述第一通信链路用于在所述中继UE与接入网设备之间传输第一业务的数据；所述第二通信链路用于在所述中继UE与远程UE之间传输所述第一业务的数据；
    收发单元，用于根据所述对应关系，传输所述远程UE的所述第一业务的数据。
  18. 根据权利要求17所述的中继UE，其特征在于，所述收发单元还用于，从所述接入网设备接收所述第一通信链路的标识信息和所述第二通信链路的标识信息；
    所述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述中继UE根据所述第一通信链路的标识信息和所述第二通信链路的标识信息，建立所述第一通信链路和所述第二通信链路之间的对应关系。
  19. 根据权利要求17所述的中继UE，其特征在于，所述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述处理单元通过所述收发单元从所述接入网设备接收所述对应关系。
  20. 根据权利要求17所述的中继UE，其特征在于，所述收发单元还用于，从所述接入网设备接收第一对应关系；所述第一对应关系是所述第一通信链路与所述远程UE的至少两个PC5接口通信链路之间的对应关系；
    所述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述处理单元从所述至少两个PC5接口通信链路中，确定所述第二通信链路；
    所述处理单元建立所述第一通信链路和所述第二通信链路之间的对应关系。
  21. 根据权利要求20所述的中继UE，其特征在于，所述收发单元还用于，从所述接入网设备接收所述第一业务的PC5服务质量QoS参数；从所述接入网设备接收第二对应关系；所述第二对应关系是所述至少两个PC5接口通信链路与PC5 QoS参数之间的对应关系；
    所述处理单元从所述至少两个PC5接口通信链路中，确定所述第二通信链路，包括：
    所述处理单元根据所述第一业务的PC5 QoS参数，所述第一对应关系和所述第二对应关系，从所述至少两个PC5接口通信链路中确定所述第二通信链路。
  22. 根据权利要求21所述的中继UE，其特征在于，所述第一业务的PC5 QoS参数包括以下参数中的一种或多种：所述PC5接口的资源类型、所述PC5接口的调度优先级、所述PC5接口的时延、所述PC5接口的丢包率、所述PC5接口的最大突发流量或所述PC5接口的时间窗大小；
    其中，所述PC5接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。
  23. 根据权利要求17所述的中继UE，其特征在于，所述收发单元还用于，接收所述第一业务的PC5 QoS参数；以及，从所述接入网设备接收所述第一通信链路的标识信息；
    所述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述处理单元根据所述第一业务的PC5 QoS参数，确定所述第二通信链路；
    所述处理单元建立所述第一通信链路和所述第二通信链路之间的对应关系。
  24. 根据权利要求17所述的中继UE，其特征在于，所述收发单元还用于，从所述远程UE接收所述第二通信链路的配置信息；以及，从所述接入网设接收所述第一通信链路的标识信息；
    所述处理单元获取第一通信链路和第二通信链路之间的对应关系，包括：
    所述处理单元根据所述第二通信链路的配置信息和所述第一通信链路的标识信息，建立所述第一通信链路和所述第二通信链路之间的对应关系。
  25. 根据权利要求17-24中任一项所述的中继UE，其特征在于，所述第一通信链路是数据无线承载DRB，所述第二通信链路是侧链路无线承载SLRB。
  26. 一种接入网设备，其特征在于，所述接入网设备包括：
    收发单元，用于接收第一业务的Uu服务质量QoS需求信息；
    处理单元，用于根据所述第一业务的Uu QoS需求信息，确定通过在所述接入网设备与中继UE之间的第一通信链路传输所述第一业务的数据；以及，根据第一Uu QoS参数与第一PC5 QoS参数的对应关系，以及所述第一业务的Uu QoS需求信息，确定第二通信链路；所述第二通信链路用于在所述中继UE与远程UE之间传输所述第一业务的数据；
    所述收发单元还用于，向所述中继用户设备UE发送通信链路信息，所述通信链路信息用于表征或建立所述第一通信链路与所述第二通信链路之间的对应关系；
    其中，所述第一Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第一业务的数据，所述第一PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第一业务的数据。
  27. 根据权利要求26所述的接入网设备，其特征在于，所述通信链路信息包括所述第一通信链路与所述第二通信链路之间的对应关系；或者，所述通信链路信息包括所述第一通信链路的标识信息和所述第二通信链路的标识信息。
  28. 根据权利要求26所述的接入网设备，其特征在于，所述收发单元还用于，接收第二业务的Uu QoS需求信息；
    所述处理单元还用于，根据所述第二业务的Uu QoS需求信息，确定通过所述第一通信链路传输所述第二业务的数据；以及，根据第二Uu QoS参数与第二PC5 QoS参数的对应关系，以及所述第二业务的Uu QoS需求信息，确定第三通信链路；所述第三通信链路用于所述中继UE与所述远程UE之间传输所述第二业务的数据；
    其中，所述通信链路信息包括所述第一通信链路，与所述远程UE的至少两个PC5接口通信链路之间的对应关系，所述至少两个PC5接口通信链路包括所述第二通信链路和所述第三通信链路；所述第二Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第二业务的数据，所述第二PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第二业务的数据。
  29. 根据权利要求28所述的接入网设备，其特征在于，所述收发单元还用于，接收第三业务的Uu QoS需求信息；
    所述处理单元还用于，根据所述第三业务的Uu QoS需求信息，确定通过所述第一通信链路传输所述第三业务的数据；根据第三Uu QoS参数与第三PC5 QoS参数的对应关系，以及所述第三业务的Uu QoS需求信息，确定第四通信链路；所述第四通信链路用于所述中继UE与所述远程UE之间传输所述第三业务的数据；
    其中，所述至少两个PC5接口通信链路还包括所述第四通信链路；所述第三Uu QoS参数用于通过所述中继UE与所述接入网设备之间的Uu接口传输所述第三业务的数据，所述第三PC5 QoS参数用于通过所述中继UE与所述远程UE之间的PC5接口传输所述第三业务的数据。
  30. 根据权利要求26-29中任一项所述的接入网设备，其特征在于，所述第一业务的Uu QoS需求信息包括以下一种或多种：所述Uu接口的资源类型、所述Uu接口的调度优先级、所述Uu接口的时延、所述Uu接口的丢包率、所述Uu接口的最大突发流量或所述Uu接口的时间窗大小；
    其中，所述Uu接口的资源类型包括以下一种或多种：保证比特速率GBR类型、非保证比特速率Non-GBR类型和时延临界保证比特速率Delay-critical GBR类型。
  31. 根据权利要求26-30中任一项所述的接入网设备，其特征在于，
    所述收发单元还用于，通过协议数据单元PDU会话接收来自会话管理功能SMF网元的所述第一业务的Uu QoS需求信息。
  32. 根据权利要求26-31中任一项所述的接入网设备，其特征在于，
    所述收发单元还用于，接收来自策略和控制功能PCF网元的所述第一Uu QoS参数与第一PC5 QoS参数的对应关系。
  33. 一种中继用户设备UE，其特征在于，所述中继用户设备UE包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述计算机程序，以实现如权利要求1-9中任一项所述的方法。
  34. 一种接入网设备，其特征在于，所述接入网设备包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述计算机程序，以实现如权利要求10-16中任一项所述的方法。
  35. 一种通信系统，所述通信系统包括：
    如权利要求17-25或33中任一项所述的中继用户设备UE；和
    如权利要求26-32或34中任一项所述的接入网设备。
  36. 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上存储有计算机程序代码，所述计算机程序代码被处理电路执行时实现如权利要求1-9或10-16中任一项所述的方法。
  37. 一种芯片系统，其特征在于，所述芯片系统包括处理电路、存储介质，所述存储介质中存储有计算机程序代码；所述计算机程序代码被所述处理电路执行时实现如权利要求1-9或10-16中任一项所述的方法。
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