WO2020030165A1 - 数据传输方法及装置，业务切换方法及装置 - Google Patents

数据传输方法及装置，业务切换方法及装置 Download PDF

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Publication number
WO2020030165A1
WO2020030165A1 PCT/CN2019/100110 CN2019100110W WO2020030165A1 WO 2020030165 A1 WO2020030165 A1 WO 2020030165A1 CN 2019100110 W CN2019100110 W CN 2019100110W WO 2020030165 A1 WO2020030165 A1 WO 2020030165A1
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Prior art keywords
terminal
information
interface
qos flow
sidelink
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PCT/CN2019/100110
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English (en)
French (fr)
Inventor
汪梦珍
陈琳
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ZTE Corp
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ZTE Corp
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Priority to US17/267,437 priority Critical patent/US12192817B2/en
Priority to KR1020217007349A priority patent/KR102667781B1/ko
Priority to DK19846735.9T priority patent/DK3836618T3/da
Priority to EP19846735.9A priority patent/EP3836618B1/en
Publication of WO2020030165A1 publication Critical patent/WO2020030165A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0257—Traffic management, e.g. flow control or congestion control per individual bearer or channel the individual bearer or channel having a maximum bit rate or a bit rate guarantee
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0263—Traffic management, e.g. flow control or congestion control per individual bearer or channel involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
    • 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
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communications, for example, to a data transmission method and device, and a service switching method and device.
  • the Internet of Vehicles refers to a large system network for wireless communication and information exchange between cars-X (X: cars, pedestrians, roadside equipment and the Internet, etc.) in accordance with agreed communication protocols and data interaction standards. . Communication through the Internet of Vehicles can enable vehicles to obtain driving safety, improve traffic efficiency, and obtain convenience or entertainment information.
  • vehicle-to-vehicle communication includes three different types: Vehicle-to-Vehicle (V2V), and vehicle-roadside equipment / network infrastructure (Vehicle-to-Vehicle) to-Infrastructure / Vehicle-to-Network (referred to as V2I / V2N), and vehicle-to-pedestrian (V2P), collectively referred to as V2X communication
  • V2V Vehicle-to-Vehicle
  • V2I / V2N Vehicle-to-Network
  • V2P vehicle-to-pedestrian
  • Figure 1 is based on V2X pass-through
  • FIG. 1 A schematic diagram of a scenario of a sidelink service is shown in FIG. 1, which includes a base station, UE1, UE2, and UE3, and three terminals perform sidelink service transmission.
  • the V2X communication method based on the Sidelink between User Equipment (UE) is implemented by the V2X standard.
  • the service data is not forwarded by the base station and the core network, and is directly transmitted by the source user equipment to the target user equipment through the air interface. As shown in FIG. .
  • V2X communication scenarios have further expanded and have higher performance requirements.
  • the advanced V2X business is mainly divided into 4 categories: vehicle platooning, extended sensors, advanced driving (semi-automated, full-automated driving), and remote driving (remote) driving).
  • the required performance requirements the data packet size supports 50 to 12000 bytes, the transmission rate is 2 to 50 messages per second, the maximum end-to-end delay is 3-500 milliseconds, the reliability is 90% -99.999%, and the data rate is 0.5-1000Mbps And the transmission range supports 50-1000 meters.
  • 3GPP has set up a research on vehicle networking communication based on the fifth generation mobile communication technology (5G, 5th Generation), including vehicle networking communication based on 5G air interface and vehicle networking communication based on 5G sidelink.
  • 5G, 5th Generation fifth generation mobile communication technology
  • the embodiments of the present application provide a data transmission method and device, and a service switching method and device, so as to at least solve the problem that the related technology lacks a new wireless radio that is suitable for determining the Sidelink service quality guarantee and bearer scheme.
  • a data transmission method which includes: a first terminal obtaining first information about a quality of service QoS of a direct link Sidelink data packet to be transmitted; performing sidelink bearer configuration; and according to the first information , Mapping the data packet to be transmitted to a Sidelink bearer for transmission to the second terminal.
  • a service switching method including: a first terminal acquiring service switching information; and performing a service switching according to the service switching information, wherein the service switching is used to switch the service
  • the data packet to be transmitted is switched between the Uu interface and the PC5 interface.
  • a data transmission device including: a first acquisition module configured to acquire first information about a quality of service QoS of a data packet to be transmitted on a side link Sidelink; a first configuration A module configured to perform sidelink bearer configuration; a first mapping module configured to map a to-be-transmitted data packet to a sidelink bearer for transmission to a second terminal according to the first information.
  • a service switching device including: a second acquisition module configured to obtain service switching information from a first terminal; and a second switching module configured to perform service switching information according to the service switching information.
  • Service switching wherein the service switching is used to switch the data packet to be transmitted between a Uu interface and a PC5 interface.
  • a storage medium stores a computer program, and the computer program is configured to execute the steps in any one of the foregoing method embodiments when running.
  • an electronic device which includes a memory and a processor.
  • the memory stores a computer program
  • the processor is configured to run the computer program to execute any one of the foregoing. Steps in a method embodiment.
  • the first terminal obtains first information about the quality of service QoS of the direct link Sidelink data packet to be transmitted, and the first terminal performs sidelink bearer configuration, and according to the first information, maps the data packet to be transmitted to the Sidelink bearer transmission To the second terminal.
  • a scheme suitable for Sidelink service quality assurance and bearer configuration and mapping in the new radio is given, which solves the lack of related technologies in the new radio and applies the Sidelink service quality Issues in guaranteeing and determining the Sidelink bearer scheme.
  • FIG. 1 is a schematic diagram of a scene of a V2X Sidelink service according to related technologies
  • FIG. 2 is a block diagram of a hardware structure of a mobile terminal according to a data transmission method according to an embodiment of the present application
  • FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of UE data mapping according to a specific embodiment 2 of this application document;
  • FIG. 5 is a schematic diagram of a Sidelink unicast bearer configuration according to a specific embodiment 2 of this application document; FIG.
  • FIG. 6 is a schematic diagram of a service switching based on a V2X data packet according to a specific embodiment 3 of this application document;
  • FIG. 7 is a flowchart of a service switching from a Uu interface service to a PC5 according to a specific embodiment 3 of this application document;
  • FIG. 8 is a flowchart of a service switching from a PC5 interface to a Uu interface according to a specific embodiment 3 of this application document;
  • FIG. 9 is a schematic diagram of a service switching based on a V2X data packet according to a specific embodiment 4 of the application document;
  • FIG. 10 is a schematic diagram of a service switching based on QoS flow according to a specific embodiment 4 of this application document; FIG.
  • FIG. 11 is a first schematic flowchart of a service switching process from a Uu interface to a PC5 according to Embodiment 5 of the present application;
  • FIG. 12 is a second schematic flowchart of a service switching process from a Uu interface to a PC5 according to Embodiment 5 of the present application;
  • FIG. 12 is a second schematic flowchart of a service switching process from a Uu interface to a PC5 according to Embodiment 5 of the present application;
  • FIG. 13 is a schematic flowchart of a PC5 to Uu service switching process according to Embodiment 5 of the present application.
  • An embodiment of the present application provides a mobile communication network (including a 5G mobile communication network), and a network architecture of the network may include a network-side device (for example, a base station) and a terminal.
  • a network-side device for example, a base station
  • This embodiment provides an information transmission method that can be run on the above network architecture. It should be noted that the operating environment of the above information transmission method provided in the embodiment of the present application is not limited to the above network architecture.
  • FIG. 2 is a block diagram of a hardware structure of a mobile terminal according to a data transmission method according to an embodiment of the present application.
  • the mobile terminal 20 may include one or more (only one is shown in FIG. 2) a processor 202 (the processor 202 may include a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a processor.
  • the above-mentioned mobile terminal may further include a transmission device 206 and an input-output device 208 for communication functions.
  • the structure shown in FIG. 2 is only schematic, and does not limit the structure of the mobile terminal.
  • the mobile terminal 20 may further include more or fewer components than those shown in FIG. 2, or have a different configuration from that shown in FIG. 2.
  • the memory 204 may be used to store software programs and modules of application software, such as program instructions / modules corresponding to the data transmission method in the embodiment of the present application.
  • the processor 202 executes various programs by running the software programs and modules stored in the memory 204 Function application and data processing, that is, the above method is implemented.
  • the memory 204 may include a high-speed random access memory, and may further include a non-volatile memory, such as one or more magnetic storage devices, a flash memory, or other non-volatile solid-state memory.
  • the memory 204 may further include memories remotely disposed with respect to the processor 202, and these remote memories may be connected to the mobile terminal 20 through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
  • the transmission device 206 is used for receiving or transmitting data via a network.
  • the above-mentioned network example may include a wireless network provided by a communication provider of the mobile terminal 20.
  • the transmission device 206 includes a network adapter (Network Interface Controller, NIC).
  • the transmission device 206 can be connected to other network devices through a base station so as to communicate with the Internet.
  • the transmission device 206 may be a radio frequency (RF) module, and the transmission device 206 is configured to communicate with the Internet in a wireless manner.
  • RF radio frequency
  • FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present application. As shown in FIG. 3, the method includes the following steps:
  • step S302 the first terminal obtains first information about a quality of service QoS of a data packet to be transmitted on the side link Sidelink.
  • step S304 sidelink bearer configuration is performed.
  • step S306 the data packet to be transmitted is mapped to a Sidelink bearer and transmitted to the second terminal according to the first information.
  • the aforementioned data packet to be transmitted may be a Sidelink data packet.
  • the first terminal obtains first information about the quality of service QoS of the direct link Sidelink data packet to be transmitted, and the first terminal performs sidelink bearer configuration, and according to the first information, maps the data packet to be transmitted to the Sidelink bearer transmission To the second terminal.
  • the first information related to QoS a scheme suitable for mapping a Sidelink bearer in a new radio is given, and a problem in the related technology that lacks a scheme suitable for determining a Sidelink bearer in a new radio is solved.
  • the technical solution related to the Sidelink bearer in this application document may be applied to a logical channel.
  • the execution subject of the above steps may be a mobile terminal such as a vehicle.
  • the first information includes at least one of the following: the second information includes a fifth-generation mobile system service quality identifier 5QI and / or a transmission range corresponding to the data packet to be transmitted; and the third information, Including at least one of the following information corresponding to the data packet to be transmitted: priority, reliability, transmission delay, data rate, packet error rate, transmission range; fourth information, including QoS rules rules of Sidelink; fifth information, Includes Sidelink's QoS profile profile.
  • the second information includes a fifth-generation mobile system service quality identifier 5QI and / or a transmission range corresponding to the data packet to be transmitted
  • the third information Including at least one of the following information corresponding to the data packet to be transmitted: priority, reliability, transmission delay, data rate, packet error rate, transmission range; fourth information, including QoS rules rules of Sidelink; fifth information, Includes Sidelink's QoS profile profile.
  • obtaining, by the first terminal, the first information about the quality of service QoS of the through link Sidelink includes:
  • the V2X application layer obtains the second information or the third information.
  • V2X can be data transmission between car and X elements, including car-car communication, car-car communication, car-device communication, etc.
  • the first terminal when the first information is the fourth information and / or the fifth information, the first terminal obtains the first information about the quality of service QoS of the direct link Sidelink, including one of the following: The first terminal obtains the fourth information and / or the fifth information from the V2X control function entity; the first terminal obtains the fourth information and / or the fifth information from the pre-configured information; the first terminal obtains the information from The network-side access and mobility management function entity obtains the fourth information.
  • the fourth information includes at least one of the following information: 5QI, Guaranteed Flow Bit Rate (GFBR), Maximum Flow Bit Rate (MFBR), and averaging window.
  • GFBR Guaranteed Flow Bit Rate
  • MFBR Maximum Flow Bit Rate
  • the QoS rules of the Sidelink are the same as the QoS rules of the Uu (User Equipment) of the first terminal, or the QoS rules of the Uu interface of the first terminal. different.
  • performing sidelink bearer configuration includes one of the following: the first terminal autonomously configures the sidelink bearer according to the fourth information and / or the fifth information; the first terminal sends the sidelink bearer configuration information to The second terminal receives the Sidelink bearer configuration response information fed back by the second terminal, and configures the Sidelink bearer according to the Sidelink bearer configuration response information.
  • the Sidelink bearer configuration information includes at least one of the following: bearer identification, SDAP (Service Data Adaptation Protocol, Service Data Adaptation Protocol) configuration, PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) configuration, RLC (Radio Link Control) configuration, logical channel configuration, mirrored QoS indication, and QoS parameters.
  • QoS parameters include multiple information 5QI, GFBR, MFBR, averaging window
  • the method satisfies at least one of the following:
  • the SDAP configuration includes at least one of the following: empty NULL, the default bearer indication, the QoS flow list mapped to the bearer, whether to include the SDAP subheader;
  • PDCP configuration includes at least one of the following: packet discard timer, PDCP sequence number length, header compression, and reordering timer;
  • the RLC configuration includes at least one of the following: non-acknowledgment mode or confirmation mode, polling related configurations in confirmation mode, maximum retransmission times in confirmation mode, and whether out-of-order delivery is supported;
  • Logical channel configuration includes at least one of the following: logical channel identification, logical channel priority, priority guaranteed bit rate, bucket size duration, subcarrier interval, associated sidelink bandwidth part (BWP) index, associated carrier Instructions
  • QoS parameters include at least one of the following: 5QI, assigned reservation priority, UE-PC5 interface maximum aggregate bit rate UE-PC5-AMBR, PC5 guaranteed stream bit rate GFBR, PC5 maximum stream bit rate MFBR, PC5 mirrored QoS indication, priority, Packet delay, packet error rate, reliability, resource type.
  • the Sidelink bearer configuration response information includes at least one of: a list of sidelink bearers supported by the second terminal; and a list of sidelink bearers not supported by the second terminal. It may also include the reason that the second terminal does not support Sidelink bearer
  • performing sidelink bearer configuration includes: the first terminal receiving Sidelink bearer configuration information sent by a base station; and configuring the Sidelink bearer according to the Sidelink bearer configuration information.
  • mapping the data packet to be transmitted to the Sidelink bearer for transmission according to the first information includes one of the following: when the first information is the second information, the first information is associated with the first information The 5QI to-be-transmitted data packet is mapped to a Sidelink bearer associated with the first 5QI and transmitted; when the first information is the fourth information, the to-be-transmitted data is transmitted according to the Sidelink rules and Sidelink bearer configuration information. Data packets are mapped to the corresponding Sidelink bearers for transmission.
  • mapping the data packet to be transmitted to a corresponding Sidelink bearer for transmission according to the Sidelink rules includes: the first terminal mapping the data packet to be transmitted to a QoS flow according to the Sidelink rules
  • the Sidelink SDAP entity of the first terminal maps the QoS flow to a Sidelink bearer for transmission.
  • the method includes: in the first terminal, the Sidelink SDAP entity is the same as the Uu SDAP entity, or the Sidelink SDAP entity is different from the Uu SDAP entity.
  • the Sidelink SDAP entity of the first terminal mapping the QoS flow to a Sidelink bearer for transmission includes:
  • the first terminal determines a mapping rule between the QoS flow and the Sidelink bearer;
  • the first terminal maps the QoS flow to the Sidelink bearer for transmission according to the mapping relationship of the non-empty list.
  • the first terminal SDAP entity marks the QoS flow corresponding to the QoS flow packet Identify the QFI.
  • the QFI and QoS flow are used to provide a basis for a peer UE to update a first mapping relationship, wherein the first mapping relationship is a mapping relationship between QFI and Sidelink bearers stored by the peer UE.
  • the first terminal after the data packet to be transmitted is mapped to the Sidelink bearer and transmitted to the second terminal according to the first information, the first terminal obtains service switching information; and performs service switching according to the service switching information.
  • the service switching is used to switch the data packet to be transmitted between a Uu interface and a PC5 interface.
  • the service switching information includes at least one of the following: application layer information, access layer information, and service switching indication information configured by the base station.
  • the method satisfies at least one of the following:
  • the application layer information includes at least one of the following: data packet service type, QoS flow service type, and QoS requirement information, wherein the QoS requirement information includes at least one of: priority, delay, reliability, transmission rate, data Rate, transmission range
  • the access layer information includes at least one of the following: Uu interface link quality, Uu interface reference signal received power, Uu interface bearer and QoS parameters, Uu interface congestion degree, PC5 interface link quality, PC5 connection establishment status, PC5 interface Channel busy rate, PC5 interface discovery signal received power, PC5 interface synchronization signal received power, PC5 interface resource conflict probability, PC5 interface congestion, PC5 interface bearer and QoS parameters;
  • the service switching instruction information configured by the base station includes at least one of the following: service switching instruction, Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • service switching instruction Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • the PC5QoS flow quality of service flow identifier QFI the mapping relationship between the switched PC5QoS flow and the DRB (Data Radio Bearer, data radio bearer), the switching Uu QoS flow information, the switching Uu QoS flow and the sidelink bearer mapping relationship.
  • the UuQoS flow information includes: PDU session identifier, QFI.
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal application layer determines that the fourth data packet is transmitted through the Uu interface
  • the first terminal maps the fourth data packet to the fourth QoS flow through the Uu interface QoS rules, and the first terminal SDAP entity will The fourth QoS flow is mapped to DRB transmission;
  • the first terminal application layer determines that the fifth data packet is transmitted through the PC5 interface, the first terminal application layer sets a fifth 5QI corresponding to the fifth data packet, and the first terminal maps the fifth data packet to A Sidelink bearer associated with the fifth 5QI;
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow to the DRB;
  • the first terminal When the first terminal determines that the seventh data packet is transmitted on the PC5 interface according to the service switching information, the first terminal maps the seventh data packet to PC5QoS flow through PC5QoS rules, and the SDAP entity of the first terminal The PC5QoS flow is mapped to the Sidelink bearer for transmission;
  • the first terminal maps the data packet to the eighth QoS flow according to the QoS rules, when determining to transmit the eighth QoS flow through the Uu interface, the first terminal indicates the eighth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the eighth QoS flow to a DRB transmission according to the eighth information;
  • the first terminal After the first terminal maps the data packet to the ninth QoS flow according to the QoS rules, when determining to transmit the ninth QoS flow through the PC5 interface, the first terminal indicates the ninth information of the transmission path to the SDAP entity of the first terminal, The first terminal SDAP entity maps the ninth QoS flow to a Sidelink bearer for transmission according to the ninth information.
  • the method further includes at least one of the following: the first terminal sends first notification information to a base station, and the base station according to the first notification information Update the mapping relationship between DRB and QFI; the first terminal sends a second notification message to the second terminal, wherein the second terminal updates the mapping relationship between Sidelink bearer and QFI according to the second notification message, or releases Connected to PC5 of the first terminal.
  • a service switching method including the following steps:
  • Step 110 The first terminal obtains service switching information.
  • Step 210 Perform service switching according to the service switching information, wherein the service switching is used to switch the data packet to be transmitted between a Uu interface and a PC5 interface.
  • the first terminal obtains service switching information and performs switching according to the service switching information, and provides a service switching method between the Uu interface and the PC5 interface applicable to the new wireless, which solves the lack of related technologies and is applicable to the new wireless.
  • the service switching information includes at least one of the following: application layer information, access layer information, and service switching indication information configured by the base station.
  • the method satisfies at least one of the following:
  • the application layer information includes at least one of the following: data packet service type, QoS flow service type, and QoS requirement information, wherein the QoS requirement information includes at least one of: priority, delay, reliability, transmission rate, data Rate, transmission range
  • the access layer information includes at least one of the following: Uu interface link quality, Uu interface reference signal received power, Uu interface bearer and QoS parameters, Uu interface congestion degree, PC5 interface link quality, PC5 connection establishment status, PC5 interface Channel busy rate, PC5 interface discovery signal received power, PC5 interface synchronization signal received power, PC5 interface resource conflict probability, PC5 interface congestion, PC5 interface bearer and QoS parameters;
  • the service switching instruction information configured by the base station includes at least one of the following: service switching instruction, Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • service switching instruction Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • the PC5QoS flow quality of service flow identifier QFI the mapping relationship between the switched PC5QoS flow and the DRB, the switched Uu QoS flow information, the switched Uu QoS flow and the sidelink bearer mapping relationship.
  • Uu QoS flow information includes: PDU session identification, QFI.
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal autonomously decides to perform service switching according to the service switching information
  • the first terminal acquires service switching instruction information sent by a base station, and performs service switching according to the service switching instruction information.
  • performing service switching according to the service switching information includes one of the following:
  • Service switching for each QoS flow is performed according to the service switching information.
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal application layer determines that the fourth data packet is transmitted through the Uu interface
  • the first terminal maps the fourth data packet to the fourth QoS flow through the Uu interface QoS rules, and the first terminal SDAP entity will The fourth QoS flow is mapped to DRB transmission;
  • the first terminal application layer determines that the fifth data packet is transmitted through the PC5 interface, the first terminal application layer sets a fifth 5QI corresponding to the fifth data packet, and the first terminal maps the fifth data packet to A Sidelink bearer associated with the fifth 5QI;
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow to the DRB;
  • the first terminal When the first terminal determines that the seventh data packet is transmitted on the PC5 interface according to the service switching information, the first terminal maps the seventh data packet to PC5QoS flow through PC5QoS rules, and the SDAP entity of the first terminal The PC5QoS flow is mapped to the Sidelink bearer for transmission;
  • the first terminal maps the data packet to the eighth QoS flow according to the QoS rules, when determining to transmit the eighth QoS flow through the Uu interface, the first terminal indicates the eighth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the eighth QoS flow to a DRB transmission according to the eighth information;
  • the first terminal After the first terminal maps the data packet to the ninth QoS flow according to the QoS rules, when determining to transmit the ninth QoS flow through the PC5 interface, the first terminal indicates the ninth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the ninth QoS flow to a Sidelink bearer for transmission according to the ninth information;
  • the data packet to be transmitted is mapped to the QoS flow according to QoS rules, and the SDAP entity of the first terminal QoS flow is mapped to the data radio bearer DRB for transmission.
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow or the eighth QoS flow into the DRB, including one of the following:
  • the SDAP entity of the first terminal maps the sixth or seventh or eighth QoS flow to DRB transmission according to the mapping relationship between QoS flow and DRB in the sidelink bearer configuration;
  • the SDAP entity of the first terminal maps the sixth or seventh or eighth QoS flow to a default DRB transmission
  • the first terminal When the mapping relationship between QoS flow and DRB is not configured, the first terminal initiates a session request to establish a new session and configures the mapping relationship between QoS flow and DRB, or the first terminal initiates a session request to modify the current session and configure The mapping relationship between QoS flow and DRB.
  • the method before the first terminal SDAP entity maps the PC5QoS flow to a Sidelink bearer for transmission, the method further includes that the first terminal obtains the PC5QoS flow and Sidelink in one of the following ways:
  • the method further includes at least one of the following:
  • the first terminal sends first notification information to a base station, indicating that the tenth QoS flow transmitted on the Uu interface is switched to the PC5 interface, and the base station updates the mapping relationship between DRB and QFI according to the first notification information, that is,
  • the first notification information may indicate which QoS flows in the Uu interface are switched;
  • the base station configures a sidelink bearer for the first terminal according to the QoS parameters of the QoS flow in the indicated first notification information;
  • the first notification message includes a tenth QoS flow used to indicate that the tenth QoS flow transmitted on the Uu interface is switched to the PC5 interface.
  • the first terminal after the first terminal sends the first notification information to the base station, it receives a Sidelink bearer configuration configured by the base station for the first terminal according to the QoS parameter of the tenth QoS flow.
  • the V2X application layer associates the V2X packet with the corresponding 5QI.
  • the V2X application layer passes the V2X packet to the AS (access) layer, it carries the 5QI corresponding to the packet.
  • Each SL LCH Logical Channel
  • 5QIs the mapping relationship between SL LCHs and 5QIs is implemented by the UE or configured by the eNB).
  • the UE maps the packet to the SLCH associated with the same 5QI according to the 5QI associated with the V2X packet.
  • 5QI can be standardized, pre-configured, or dynamically allocated. Each 5QI contains at least one of the following: priority, delay, false alarm rate, resource type, average window. In addition, when the V2X application layer passes the V2X packet to the AS layer, it can also carry the required transmission range.
  • the upper layer sends the V2X data packet near field communication packet priority (Prose Packet Priority, PPPP) when sending the V2X data packet to the AS layer.
  • packet delay packet delay
  • PPPR Packeper Packet Reliability
  • each SL LCH is associated with a priority
  • the UE maps the data packet to the SL LCH with the same priority for transmission.
  • the UE informs the physical layer of the delay requirement, and the physical layer considers the delay when selecting the resource.
  • V2X application layer passes V2X data packets to the AS layer, in addition to carrying PPPP and PPPR, it also carries the data transmission rate and transmission range.
  • scheme 1 only needs to provide a 5QI value instead of a set of parameters to reduce the overhead.
  • the UE is pre-configured with or obtains sidelink QoS rules from V2X control functions for mapping V2X packets to sidelink QoS flows.
  • the UE is pre-configured with or obtains sidelink QoS profiles from V2X control functions for reference and establishes SL RB (sidelink radio bearer). .
  • FIG. 4 is a schematic diagram of UE data mapping according to the specific embodiment 2 of this application document.
  • the UE maps V2X packets to QoS flows based on sidelink QoS rules (each QFI is associated with a QFI), and the UE according to QoS flows QFI finds the corresponding QoS parameters in the QoS profile, and then establishes SL and RB according to the QoS parameters; multiple QoS flows can be transmitted through one SL and RB, and the mapping relationship between QFI and SL and RB can be implemented by the UE.
  • the sidelink adds the SDAP layer, and the QoS flow to SL and RB mapping is performed through the SDAP layer, and each UE has an SDAP entity.
  • the UE autonomously establishes a sidelink bearer according to the arriving data packet and the corresponding QoS parameters of the data packet. This method can also be used for sidelink unicast communication.
  • UEs can negotiate to establish sidelink bearers.
  • sidelink bearers In some embodiments:
  • the source UE sends sidelink bearer-related configuration information to the target UE, including at least one of the following: bearer identification, SDAP configuration, PDCP configuration, RLC configuration, logical channel configuration, mirrored QoS indication, and QoS parameters.
  • the SDAP configuration includes at least one of the following: : NULL, default bearer indication, whether the QoS flow list (QFIs) mapped to this bearer contains SDAP subheaders;
  • PDCP configuration includes at least one of the following: packet drop timer, PDCP sequence number length, header compression, reordering timer ;
  • RLC configuration includes at least one of the following: non-acknowledgment mode or confirmation mode, polling related configuration in confirmation mode, maximum retransmission times in confirmation mode, whether out of order delivery;
  • logical channel configuration includes at least one of the following: logical channel identification, Logical channel priority, priority guaranteed bit rate, bucket size duration, subcarrier interval, associated sidelink BWP index, associated carrier indication.
  • the mapping relationship between QoS flow and SL RB is implemented by the sending UE itself; if the QoS flow list mapped to this bearer is not empty, both sides of the UE follow the The mapping relationship maps QoS flow to SL RB; if the QoS flow list mapped to this bearer is not empty and supports mirrored QoS indication, the UE SDAP entity marks the QFI corresponding to the data packet, and the opposite UE can mark the QFI according to the data packet. And the SL RB configuration of the peer UE, and update the mapping relationship between SL RB and QFI (QoS flow).
  • QoS parameters include at least one of the following: 5QI, assigned reservation priority, UE-PC5 interface maximum aggregate bit rate UE-PC5-AMBR, PC5 guaranteed stream bit rate GFBR, PC5 maximum stream bit rate MFBR, PC5 mirrored QoS indication, priority, Packet delay, packet error rate, reliability, resource type.
  • the target UE After receiving the sidelink bearer configuration information, the target UE evaluates whether it can support these sidelink bearer configurations and feedbacks the sidelink bearer configuration response information, including the list of supported sidelink bearers, the list of unsupported sidelink bearers, and the reasons for not supporting.
  • the reasons for not supporting may be: QoS requirements cannot be guaranteed, sidelink resources are insufficient, and sidelink resource collision probability is high.
  • FIG. 5 is a schematic diagram of a Sidelink unicast bearer configuration according to a specific embodiment 2 of this application document.
  • the base station can configure a sidelink bearer for the UE.
  • the UE obtains sidelink QoS rules from AMF, and maps V2X packets to QoS flow;
  • gNB obtains QoS profiles from AMF, configures sidelink bearers for the UE, and selects the mapping relationship between SL RB and QoS flow (QFI);
  • UE SDAP entity QoS flow is mapped to SL RB transmission.
  • sidelink QoS rules can be used with Uu QoS rules.
  • the gNB configures the sidelink bearer for the UE including at least one of the following: bearer identification, SDAP configuration, PDCP configuration, RLC configuration, logical channel configuration, mirrored QoS indication, and QoS parameters.
  • SL-RB related configuration of the receiving UE 1) gNB broadcasts SL-RB related configuration information of the sending UE (by sending the dest (destination) ID identification of the UE) through a broadcast message; 2) if gNB knows the peer UE of the sending UE (Connected state), the SLNB can be configured by the gNB for the peer UE; 3) the SLRB is sent by the sending UE and configured to the receiving UE.
  • UE1 is within coverage, UE1 sends V2X messages (V2V / V2I / V2N / V2P) through the NR air interface, and then the network sends some specific V2X messages to the UE of interest.
  • V2X messages V2V / V2I / V2N / V2P
  • the UE can obtain PC5 communication resources, when the Uu interface is under heavy load or congestion or some service delay QoS cannot be met or the Uu interface link quality is deteriorated, and the PC5 interface has a small load, sufficient resources, and low channel busy rate, Can consider switching some V2V services to PC5 interface transmission.
  • the application layer can identify that the UE discovered through Uu communication and SL discovery is the same UE.
  • the peer UE establishes a PC5 connection. When the Uu interface is heavily loaded or congestion occurs, or some service delay QoS cannot be met, or the Uu interface link quality deteriorates, some V2V services are switched to the PC5 interface for transmission.
  • the UE For the PC5 to Uu service handover, when the UE detects that it is in coverage, establishes an RRC connection with the base station. If the PC5 interface is congested, the channel busy rate is high, the probability of resource conflicts is high, or the PC5 link quality is deteriorated, the UE can change the PC5 Interface services are switched to Uu interface transmission.
  • FIG. 6 is a schematic diagram of a service switching based on a V2X data packet according to a specific embodiment 3 of this application document.
  • the application layer transmits the original through Uu according to the service type, delay, and reliability.
  • the V2V packet is switched to the PC5 interface for transmission.
  • the packet is associated with 5QI and provided to the ASlayer.
  • Each SLCH is associated with one or more 5QIs.
  • the ASlayer maps the packet to the SLLCH associated with the same 5QI.
  • the ASlayer needs to provide the Uu interface load.
  • Information Uu link quality, PC5 interface status (connection / availability), PC5 resource usage rate, PC5 channel busy rate, PC5 link quality and other information;
  • the UE application layer switches the packet originally transmitted by PC5 to Uu, maps the packet to QoS flow through Uu QoS rules, and then the UE SDAP entity maps the QoS flow to the corresponding DRB transmission.
  • FIG. 7 is a flowchart of a service switching process from a Uu interface service to a PC5 according to a specific embodiment 3 of this application document.
  • a QoS flow originally transmitted through the Uu interface each QoS flow has a corresponding QFI and 5QI
  • switch / map to SL LCH SL LCH associated 5QI.
  • AS layer provides the connection status, congestion, resource conditions, link quality, etc. of the Uu interface and PC5 interface
  • the UE combines the application layer And AS layer information comprehensively decide which QoS flow to switch to the PC5 interface.
  • FIG. 8 is a flowchart of switching from a PC5 interface to a Uu interface service according to a specific embodiment 3 of this application document.
  • PC5 to Uu based on the 5QI, the V2X packets that are transmitted through the PC5 interface and associated with a specific 5QI are mapped to the Uu interface.
  • mapping relationship between the QoS flow and DRB is not configured, then map the QoS flow To the default DRB, or initiate a PDU session modification / request process to establish a new DRB or update the mapping relationship between QoS flow and DRB to transmit the QoS flow.
  • FIG. 9 is a schematic diagram of a service switching based on a V2X data packet according to a specific embodiment 4 of this application document.
  • the application layer determines which are V2V services and selects a service based on service QoS requirements. Some V2V services are switched to the PC5 interface for transmission.
  • the application layer maps V2X packets to QoS flow (PC5) and submits them to the AS layer (PC5) according to PC5QoS rules.
  • the UESDAP entity maps PC5QoS flow to SL and RB transmission, of which PC5QoS flow and SL
  • the mapping relationship between RBs can be implemented by the UE or configured by the gNB.
  • the AS layer is required to provide the Uu interface and PC5 interface status (whether RRC / PC5 connection status), congestion, resource usage, link quality and other information.
  • the application layer switches some PC5 interface services to Uu interface for transmission based on service QoS requirements, and then maps them to QoS flow (Uu) through Uu QoS rules, which are routinely routed by Uu interface data.
  • FIG. 10 is a schematic diagram of a service switching based on QoS flow according to a specific embodiment 4 of this application document.
  • the UE application layer provides the service type and QoS requirements corresponding to QoS flow, AS layer Provide Uu interface and / or PC5 interface status, congestion, resource usage, link quality, PC5 interface SL, RB and Uu interface DRB.
  • the UE comprehensive application layer information and AS layer information decide whether to switch some services from the Uu interface to the PC5 interface for transmission and which QoS flow services to switch.
  • the upper layer of the UE indicates to the SDAP layer that the QoS flow is transmitted through Uu or PC5.
  • the UE SDAP entity maps the QoS flow to the sidelink bearer for transmission.
  • the mapping relationship between QoS flow and SL RB can be implemented by the UE or configured by gNB. If some specific QoS flows from Uu to PC5 do not have the appropriate SL and RB, you need to establish the appropriate SL and RB first.
  • the UE comprehensive application layer information and AS layer information decide whether to switch some services of the PC5 interface to the Uu interface for transmission and which QoS flow services to switch.
  • the upper layer of the UE indicates to the SDAP layer that the QoS flow is transmitted through Uu or PC5.
  • the UE SDAP entity maps the QoS flow to the DRB transmission according to the mapping relationship between the configured QoS flow and DRB, and marks the data packet with QFI.
  • the Uu interface is not configured with the mapping relationship between the QoS flow and the DRB, then map the QoS flow to the default DRB, or initiate a PDU session modification / request process to establish a new DRB or update the mapping relationship between the QoS flow and the DRB to transmit the QoS flow. .
  • a V2V service is switched from a Uu interface to a PC5 interface for sidelink unicast communication as an example to describe a service switching signaling process.
  • UE1 and UE2 originally performed V2X communication through the Uu interface. If UE1 detects that UE2 moves to a nearby service area and discovers the opposite UE2 through sidelink discovery, the application layer can identify that the UE discovered through Uu communication and SL discovery is the same UE. After UE1 discovers UE2 through sidelink discovery, it performs service switching in an autonomous decision mode or a base station control mode.
  • UE1 and UE2 originally performed V2X communication through the Uu interface. If UE1 detects that UE2 moves to a nearby service area and discovers the opposite UE2 through sidelink discovery, the application layer can identify that the UE discovered through Uu communication and SL discovery is the same UE. After UE1 discovers UE2 through sidelink discovery, it performs service switching in an autonomous decision mode or a base station control mode.
  • UE1 autonomously decides to switch some specific V2V services of the Uu interface to the PC5 interface for transmission in order to ease the Uu load.
  • UE1 obtains service switching related information from the base station, including at least one of the following: Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold; for example, when the Uu chain If the channel quality is lower than the threshold, or the PC5 link quality is higher than the threshold, service switching may be considered, or services with delay requirements higher than the threshold, or reliability requirements lower than the threshold may be considered to switch to the PC5 interface for transmission.
  • the UE1 measures Uu link quality and PC5 link quality, establishes PC5 connection and bearer configuration negotiation with UE2, and decides independently (refer to the base station configuration) to switch some V2V services transmitted by specific Uu interfaces to PC5 interfaces.
  • the specific service switching is based on
  • the sidelink QoS mechanism (scheme 1-based on 5QI QoS mechanism, or scheme 2-based on QoS flow QoS mechanism) has two methods (switching based on packet, or switching based on QoS).
  • This embodiment takes QoS flow switching based on scenario 2 as an example.
  • the UE maps the switched QoS flow to the sidelink bearer transmission, and notifies the gNB which QoS flow (PDU session ID, QFI) is switched to PC5.
  • FIG. 11 is a first schematic diagram of a service switching process from a Uu interface to a PC5 according to Embodiment 5 of the present application.
  • the base station controls service switching.
  • UE1 after UE1 discovers UE2 through sidelink discovery, UE1 reports the discovery of UE2 and PC5 link quality to gNB, and the base station issues a traffic switch instruction.
  • UE1 performs Uu to PC5 service switching.
  • UE1 determines which QoS flow (QFI) of the Uu interface is switched to the PC5 interface (Uu QFI-> SL RB) by combining application layer information and access layer information.
  • QFI QoS flow
  • UE1 reports to the gNB which QoS flow (PDU session ID, QFI) to switch, and the eNB configures sidelink bearer for UE1 according to these QoS flow QoS parameters.
  • FIG. 12 is a second schematic diagram of a service switching process from a Uu interface to a PC5 according to Embodiment 5 of the present application.
  • This embodiment uses a PC5 interface sidelink unicast communication to switch a V2V service to a Uu interface as an example to describe the service switching signaling process.
  • a PC5 connection is established and the sidelink communication is negotiated after the sidelink bearer is negotiated.
  • UE1 detects network coverage and establishes an RRC connection with the gNB. After UE1 enters the RRC connection state, it can autonomously decide whether and when to switch the PC5 interface V2V service to the Uu interface for transmission.
  • UE1 reports PC5 interface status information to gNB, such as: PC5 link quality, PC5 congestion, PC5 channel busy ratio, PC5 resource conflict, PC5 bearer and corresponding QoS parameter information, PC5 bearer and PC5 QoS flow. Mapping relationships, etc.
  • the base station issues service switching instruction information, including at least one of the following: service switching instruction, Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, PC5QoS flow information (QFI) for switching, PC5QoS for switching Mapping relationship between flow and DRB.
  • UE1 decides on its own or switches PC5QoS flow to Uu interface transmission according to the gNB configuration information.
  • UE1 initiates a PDU session modification / request message to update the mapping relationship between DRB and QoS flow or create a new DRB and configure mapping QoS flow.
  • UE1 and UE2 update the mapping relationship between PC5 QoS flow and SL RB or release PC5 connection.
  • FIG. 13 is a schematic diagram of a process of switching from a PC5 to a Uu service according to Embodiment 5 of the present application.
  • the method according to the above embodiments can be implemented by means of software plus a necessary universal hardware platform, and of course, also by hardware, but in many cases the former is Better implementation.
  • the technical solution of this application that is essentially or contributes to the existing technology can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, The optical disc) includes one or more instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the embodiments of the present application.
  • a terminal device which may be a mobile phone, a computer, a server, or a network device, etc.
  • a data transmission device and a service switching device are also provided.
  • the device is used to implement the foregoing embodiments and preferred implementation manners, and the descriptions will not be repeated.
  • the term "module” may implement a combination of software and / or hardware for a predetermined function.
  • the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and conceived.
  • a data transmission device including:
  • a first obtaining module configured to obtain first information about a quality of service QoS of a data link to be transmitted of a side link Sidelink;
  • a first configuration module configured to perform sidelink bearer configuration
  • the first mapping module is configured to map the data packet to be transmitted to a Sidelink bearer and transmit it to the second terminal according to the first information.
  • the technical solution related to the Sidelink bearer in this application document may be applied to a logical channel.
  • the execution subject of the above steps may be a mobile terminal such as a vehicle, but is not limited thereto.
  • the first information includes at least one of the following: the second information includes a fifth-generation mobile system service quality identifier 5QI and / or a transmission range corresponding to the data packet to be transmitted; and the third information, Including at least one of the following information corresponding to the data packet to be transmitted: priority, reliability, transmission delay, data rate, packet error rate, transmission range; fourth information, including QoS rules rules of Sidelink; fifth information, Includes Sidelink's QoS profile profile.
  • the second information includes a fifth-generation mobile system service quality identifier 5QI and / or a transmission range corresponding to the data packet to be transmitted
  • the third information Including at least one of the following information corresponding to the data packet to be transmitted: priority, reliability, transmission delay, data rate, packet error rate, transmission range; fourth information, including QoS rules rules of Sidelink; fifth information, Includes Sidelink's QoS profile profile.
  • obtaining, by the first terminal, the first information about the quality of service QoS of the through link Sidelink includes: The V2X application layer obtains the second information or the third information.
  • the first terminal when the first information is the fourth information and / or the fifth information, the first terminal obtains the first information about the quality of service QoS of the direct link Sidelink, including one of the following: The first terminal obtains the fourth information and / or the fifth information from the V2X control function entity; the first terminal obtains the fourth information and / or the fifth information from the pre-configured information; the first terminal obtains the The network-side access and mobility management function entity obtains the fourth information.
  • the fourth information includes at least one of the following information: 5QI, Guaranteed Flow Bit Rate (GFBR), Maximum Flow Bit Rate (MFBR), and averaging window.
  • GFBR Guaranteed Flow Bit Rate
  • MFBR Maximum Flow Bit Rate
  • the QoS rules of the Sidelink are the same as the QoS rules of the Uu interface of the first terminal, or are different from the QoS rules of the Uu interface of the first terminal.
  • performing sidelink bearer configuration includes one of the following: the first terminal autonomously configures the sidelink bearer according to the fourth information and / or the fifth information; the first terminal sends the sidelink bearer configuration information to The second terminal receives the Sidelink bearer configuration response information fed back by the second terminal, and configures the Sidelink bearer according to the Sidelink bearer configuration response information.
  • the Sidelink bearer configuration information includes at least one of the following: bearer identification, SDAP configuration, PDCP configuration, RLC configuration, logical channel configuration, mirrored QoS indication, and QoS parameters.
  • QoS parameters include multiple information 5QI, GFBR, MFBR, averaging window
  • the method satisfies at least one of the following:
  • the SDAP configuration includes at least one of the following: empty NULL, the default bearer indication, the QoS flow list mapped to the bearer, whether to include the SDAP subheader;
  • PDCP configuration includes at least one of the following: packet discard timer, PDCP sequence number length, header compression, and reordering timer;
  • the RLC configuration includes at least one of the following: non-acknowledgment mode or confirmation mode, polling related configurations in confirmation mode, maximum retransmission times in confirmation mode, and whether out-of-order delivery is supported;
  • Logical channel configuration includes at least one of the following: logical channel identification, logical channel priority, priority guaranteed bit rate, bucket size duration, subcarrier interval, associated sidelink bandwidth part (BWP) index, associated carrier Instructions
  • QoS parameters include at least one of the following: 5QI, assigned reservation priority, UE-PC5 interface maximum aggregate bit rate UE-PC5-AMBR, PC5 guaranteed stream bit rate GFBR, PC5 maximum stream bit rate MFBR, PC5 mirrored QoS indication, priority, Packet delay, packet error rate, reliability, resource type.
  • the Sidelink bearer configuration response information includes at least one of: a list of sidelink bearers supported by the second terminal; and a list of sidelink bearers not supported by the second terminal. It may also include the reason that the second terminal does not support the Sidelink bearer
  • performing sidelink bearer configuration includes: the first terminal receiving Sidelink bearer configuration information sent by a base station; and configuring the Sidelink bearer according to the Sidelink bearer configuration information.
  • mapping the data packet to be transmitted to the Sidelink bearer for transmission according to the first information includes one of the following: when the first information is the second information, the first information is associated with the first information The 5QI to-be-transmitted data packet is mapped to a Sidelink bearer associated with the first 5QI and transmitted; when the first information is the fourth information, the to-be-transmitted data is transmitted according to the Sidelink rules and Sidelink bearer configuration information. Data packets are mapped to the corresponding Sidelink bearers for transmission.
  • mapping the data packet to be transmitted to a corresponding Sidelink bearer for transmission according to the Sidelink rules includes: the first terminal mapping the data packet to be transmitted to a QoS flow according to the Sidelink rules
  • the Sidelink SDAP entity of the first terminal maps the QoS flow to a Sidelink bearer for transmission.
  • the method includes: in the first terminal, the Sidelink SDAP entity is the same as the Uu SDAP entity, or the Sidelink SDAP entity is different from the Uu SDAP entity.
  • the Sidelink SDAP entity of the first terminal mapping the QoS flow to a Sidelink bearer for transmission includes:
  • the first terminal determines the mapping rule between the QoS flow and the Sidelink bearer;
  • the first terminal maps the QoS flow to the Sidelink bearer for transmission according to the mapping relationship of the non-empty list.
  • the first terminal SDAP entity marks the QoS flow corresponding to the QoS flow packet Identify the QFI.
  • the QFI and QoS flow are used to provide a basis for a peer UE to update a first mapping relationship, wherein the first mapping relationship is a mapping relationship between QFI and Sidelink bearers stored by the peer UE.
  • the first terminal after the data packet to be transmitted is mapped to the Sidelink bearer and transmitted to the second terminal according to the first information, the first terminal obtains service switching information; and performs service switching according to the service switching information.
  • the service switching is used to switch the data packet to be transmitted between a Uu interface and a PC5 interface.
  • the service switching information includes at least one of the following: application layer information, access layer information, and service switching indication information configured by the base station.
  • the method satisfies at least one of the following:
  • the application layer information includes at least one of the following: data packet service type, QoS flow service type, and QoS requirement information, wherein the QoS requirement information includes at least one of: priority, delay, reliability, transmission rate, data Rate, transmission range
  • the access layer information includes at least one of the following: Uu interface link quality, Uu interface reference signal received power, Uu interface bearer and QoS parameters, Uu interface congestion degree, PC5 interface link quality, PC5 connection establishment status, PC5 interface Channel busy rate, PC5 interface discovery signal received power, PC5 interface synchronization signal received power, PC5 interface resource conflict probability, PC5 interface congestion, PC5 interface bearer and QoS parameters;
  • the service switching instruction information configured by the base station includes at least one of the following: service switching instruction, Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • service switching instruction Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • the PC5QoS flow quality of service flow identifier QFI the mapping relationship between the switched PC5QoS flow and the DRB, the switched Uu QoS flow information, the switched Uu QoS flow and the sidelink bearer mapping relationship.
  • the UuQoS flow information includes: PDU session identifier, QFI.
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal application layer determines that the fourth data packet is transmitted through the Uu interface
  • the first terminal maps the fourth data packet to the fourth QoS flow through the Uu interface QoS rules, and the first terminal SDAP entity will The fourth QoS flow is mapped to DRB transmission;
  • the first terminal application layer determines that the fifth data packet is transmitted through the PC5 interface, the first terminal application layer sets a fifth 5QI corresponding to the fifth data packet, and the first terminal maps the fifth data packet to A Sidelink bearer associated with the fifth 5QI;
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow to the DRB;
  • the first terminal When the first terminal determines that the seventh data packet is transmitted on the PC5 interface according to the service switching information, the first terminal maps the seventh data packet to PC5QoS flow through PC5QoS rules, and the SDAP entity of the first terminal The PC5QoS flow is mapped to the Sidelink bearer for transmission;
  • the first terminal maps the data packet to the eighth QoS flow according to the QoS rules, when determining to transmit the eighth QoS flow through the Uu interface, the first terminal indicates the eighth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the eighth QoS flow to a DRB transmission according to the eighth information;
  • the first terminal After the first terminal maps the data packet to the ninth QoS flow according to the QoS rules, when determining to transmit the ninth QoS flow through the PC5 interface, the first terminal indicates the ninth information of the transmission path to the SDAP entity of the first terminal, The first terminal SDAP entity maps the ninth QoS flow to a Sidelink bearer for transmission according to the ninth information.
  • the method further includes at least one of the following: the first terminal sends first notification information to a base station, and the base station according to the first notification information Update the mapping relationship between DRB and QFI; the first terminal sends a second notification message to the second terminal, wherein the second terminal updates the mapping relationship between Sidelink bearer and QFI according to the second notification message, or releases Connected to PC5 of the first terminal.
  • a service switching device including:
  • a second acquisition module configured to acquire service switching information for the first terminal
  • the second switching module is configured to perform service switching according to the service switching information, wherein the service switching is used to switch the data packet to be transmitted between a Uu interface and a PC5 interface.
  • the first terminal obtains service switching information and performs switching according to the service switching information, and provides a service switching method between the Uu interface and the PC5 interface applicable to the new wireless, which solves the lack of related technologies and is applicable to the new wireless.
  • the service switching information includes at least one of the following: application layer information, access layer information, and service switching indication information configured by the base station.
  • the method satisfies at least one of the following:
  • the application layer information includes at least one of the following: data packet service type, QoS flow service type, and QoS requirement information, wherein the QoS requirement information includes at least one of: priority, delay, reliability, transmission rate, data Rate, transmission range
  • the access layer information includes at least one of the following: Uu interface link quality, Uu interface reference signal received power, Uu interface bearer and QoS parameters, Uu interface congestion degree, PC5 interface link quality, PC5 connection establishment status, PC5 interface Channel busy rate, PC5 interface discovery signal received power, PC5 interface synchronization signal received power, PC5 interface resource conflict probability, PC5 interface congestion, PC5 interface bearer and QoS parameters;
  • the service switching instruction information configured by the base station includes at least one of the following: service switching instruction, Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • service switching instruction Uu link quality threshold, PC5 link quality threshold, delay threshold, reliability threshold, data rate threshold, service type, application type, switching
  • the PC5QoS flow quality of service flow identifier QFI the mapping relationship between the switched PC5QoS flow and the DRB, the switched Uu QoS flow information, the switched Uu QoS flow and the sidelink bearer mapping relationship.
  • Uu QoS flow information includes: PDU session identification, QFI
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal autonomously decides to perform service switching according to the service switching information
  • the first terminal acquires service switching instruction information sent by a base station, and performs service switching according to the service switching instruction information.
  • performing service switching according to the service switching information includes one of the following:
  • Service switching for each QoS flow is performed according to the service switching information.
  • performing service switching according to the service switching information includes one of the following:
  • the first terminal application layer determines that the fourth data packet is transmitted through the Uu interface
  • the first terminal maps the fourth data packet to the fourth QoS flow through the Uu interface QoS rules, and the first terminal SDAP entity will The fourth QoS flow is mapped to DRB transmission;
  • the first terminal application layer determines that the fifth data packet is transmitted through the PC5 interface, the first terminal application layer sets a fifth 5QI corresponding to the fifth data packet, and the first terminal maps the fifth data packet to A Sidelink bearer associated with the fifth 5QI;
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow to the DRB;
  • the first terminal When the first terminal determines that the seventh data packet is transmitted on the PC5 interface according to the service switching information, the first terminal maps the seventh data packet to PC5QoS flow through PC5QoS rules, and the SDAP entity of the first terminal The PC5QoS flow is mapped to the Sidelink bearer for transmission;
  • the first terminal maps the data packet to the eighth QoS flow according to the QoS rules, when determining to transmit the eighth QoS flow through the Uu interface, the first terminal indicates the eighth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the eighth QoS flow to a DRB transmission according to the eighth information;
  • the first terminal After the first terminal maps the data packet to the ninth QoS flow according to the QoS rules, when determining to transmit the ninth QoS flow through the PC5 interface, the first terminal indicates the ninth information of the transmission path to the SDAP entity of the first terminal, Mapping, by the first terminal SDAP entity, the ninth QoS flow to a Sidelink bearer for transmission according to the ninth information;
  • the data packet to be transmitted is mapped to the QoS flow according to QoS rules, and the SDAP entity of the first terminal QoS flow is mapped to the data radio bearer DRB for transmission.
  • the first terminal SDAP entity maps the sixth QoS flow or the seventh QoS flow or the eighth QoS flow into the DRB, including one of the following:
  • the SDAP entity of the first terminal maps the sixth or seventh or eighth QoS flow to DRB transmission according to the mapping relationship between QoS flow and DRB in the sidelink bearer configuration;
  • the SDAP entity of the first terminal maps the sixth or seventh or eighth QoS flow to a default DRB transmission
  • the first terminal When the mapping relationship between QoS flow and DRB is not configured, the first terminal initiates a session request to establish a new session and configures the mapping relationship between QoS flow and DRB, or the first terminal initiates a session request to modify the current session and configure The mapping relationship between QoS flow and DRB.
  • the method before the first terminal SDAP entity maps the PC5QoS flow to a Sidelink bearer for transmission, the method further includes that the first terminal obtains the PC5QoS flow and Sidelink in one of the following ways:
  • the method further includes at least one of the following:
  • the first terminal sends first notification information to a base station, indicating that the tenth QoS flow transmitted on the Uu interface is switched to the PC5 interface, and the base station updates the mapping relationship between DRB and QFI according to the first notification information, that is,
  • the first notification information may indicate which QoS flows in the Uu interface are switched;
  • the base station configures a sidelink bearer for the first terminal according to the QoS parameters of the QoS flow in the indicated first notification information;
  • the first notification message includes a tenth QoS flow used to indicate that the tenth QoS flow transmitted on the Uu interface is switched to the PC5 interface.
  • the first terminal after the first terminal sends the first notification information to the base station, it receives a Sidelink bearer configuration configured by the base station for the first terminal according to the QoS parameter of the tenth QoS flow.
  • the above multiple modules can be implemented by software or hardware. For the latter, they can be implemented by the following methods, but not limited to the above: the above modules are all located in the same processor; or, the above multiple modules are based on Arbitrary combinations are located in different processors.
  • An embodiment of the present application further provides a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • step S302 the first terminal obtains first information about a quality of service QoS of a data packet to be transmitted of a side link Sidelink;
  • step S304 perform sidelink bearer configuration.
  • step S306 according to the first information, a data packet to be transmitted is mapped to a Sidelink bearer and transmitted to a second terminal.
  • the storage medium is further configured to store program code for performing the following steps:
  • the foregoing storage medium may include, but is not limited to, a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), and a mobile hard disk. , Magnetic disks, or compact discs, which can store program code.
  • An embodiment of the present application further provides an electronic device including a memory and a processor.
  • the memory stores a computer program
  • the processor is configured to run the computer program to perform the steps in any one of the foregoing method embodiments.
  • the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.
  • the foregoing processor may be configured to execute the following steps by a computer program:
  • step S302 the first terminal obtains first information about a quality of service QoS of a data packet to be transmitted of a side link Sidelink;
  • step S304 perform sidelink bearer configuration.
  • step S306 according to the first information, a data packet to be transmitted is mapped to a Sidelink bearer and transmitted to a second terminal.

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Abstract

本申请提供了一种数据传输方法及装置，业务切换方法及装置，其中，该数据传输方法包括：第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息，第一终端进行sidelink承载配置，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。

Description

数据传输方法及装置，业务切换方法及装置
本申请要求在2018年08月10日提交中国专利局、申请号为201810912164.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，例如涉及一种数据传输方法及装置，业务切换方法及装置。
背景技术
在相关技术中，车联网是指按照约定的通信协议和数据交互标准，在车-X(X：车、行人、路边设备及互联网等)之间，进行无线通讯和信息交换的大系统网络。通过车联网通信可以使车辆获得行驶安全、提高交通效率以及获得便利或娱乐信息。从无线通信的对象来分类，车联网通信包括三种不同类型：车辆与车辆之间通信(Vehicle-to-Vehicle，简称为V2V)，车辆与路边设备/网络基础设施之间通信(Vehicle-to-Infrastructure/Vehicle-to-Network，简称V2I/V2N)，以及车辆与行人之间通信(Vehicle-to-Pedestrian，简称V2P)，统称为V2X通信，图1是根据相关技术中V2X直通/旁链链路(Sidelink)业务的场景示意图，如图1所示，其中包括基站，UE1，UE2和UE3，三个终端之间进行Sidelink业务传输。
在3GPP(3rd Generation Partnership Project)组织的基于LTE(Long Term Evolution，长期演进)的V2X通信研究中，基于用户设备(User Equipment，简称为UE)之间的Sidelink的V2X通信方法是V2X标准实现的方式之一，即业务数据不经过基站和核心网的转发，直接由源用户设备通过空口传输给目标用户设备，如图1所示，这种V2X通信方式简称PC5-based V2X通信或V2X sidelink通信。
随着技术进步与自动化产业发展，V2X通信场景进一步延伸且有更高的性能需求。高级V2X业务主要分为4大类：车辆组队(vehicle platooning)，扩展传感器(extended sensors)，高级驾驶(半自动驾驶、全自动驾驶(semi-automated or full-automated driving))以及远程驾驶(remote driving)。要求达到的性能需求：数据包大小支持50到12000字节，传输速率每秒2到50条消息，最大端到端延时3-500毫秒，可靠性90％-99.999％，数据率0.5-1000Mbps，以及传输范围支持50-1000米。3GPP已经立项基于第五代移动通信技术(5G，5th Generation)的车联网通信研究，包括基于5G空口的车联网通信及基于5G sidelink的车联网通信。
针对相关技术中缺乏适用于新无线中确定Sidelink服务质量保证及承载方案的问题，目前还没有有效的解决方案。
发明内容
本申请实施例提供了一种数据传输方法及装置，业务切换方法及装置，以至少解决相关技术中缺乏适用于新无线中确定Sidelink服务质量保证及承载方案的问题。
根据本申请的一个实施例，提供了一种数据传输方法，包括：第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；进行sidelink承载配置；依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
根据本申请文件的另一个实施例，还提供了一种业务切换方法，包括：第一终端获取业务切换信息；依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
根据本申请文件的另一个实施例，还提供了一种数据传输的装置，包括：第一获取模块，设置为获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；第一配置模块，设置为进行sidelink承载配置；第一映射模块，设置为依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
根据本申请文件的另一个实施例，还提供了一种业务切换装置，包括：第二获取模块，设置为第一终端获取业务切换信息；第二切换模块，设置为依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
根据本申请的又一个实施例，还提供了一种存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
根据本申请的又一个实施例，还提供了一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行上述任一项方法实施例中的步骤。
通过本申请，第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息，第一终端进行sidelink承载配置，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。采用上述方案，依据QoS相关的第一信息进行Sidelink业务传输，给出了适用于新无线中Sidelink服务质量保证及承载配置及映射的方案，解决了相关技术中缺乏适用于新无线中Sidelink服务质量保证及确定Sidelink承载方案的问题。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据相关技术中V2X Sidelink业务的场景示意图；
图2是本申请实施例的一种数据传输方法的移动终端的硬件结构框图；
图3是根据本申请实施例的数据传输方法流程图；
图4是根据本申请文件的具体实施例2的UE数据映射示意图；
图5是根据本申请文件的具体实施例2的Sidelink单播承载配置示意图；
图6是根据本申请文件具体实施例3的基于V2X数据包的业务切换示意图；
图7是根据本申请文件具体实施例3的Uu接口业务到PC5的业务切换流程图；
图8是根据本申请文件具体实施例3的PC5接口到Uu接口业务的切换流程图；
图9是根据本申请文件的具体实施例4的基于V2X数据包的业务切换示意图；
图10是根据本申请文件的具体实施例4的基于QoS flow的业务切换示意图；
图11是根据本申请具体实施例5的Uu接口到PC5业务切换流程示意图一；
图12是根据本申请具体实施例5的Uu接口到PC5业务切换流程示意图二；
图13是根据本申请具体实施例5的PC5到Uu业务切换流程示意图。
具体实施方式
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例一
本申请实施例中提供了一种移动通信网络(包括5G移动通信网络)，该网络的网络架构可以包括网络侧设备(例如基站)和终端。在本实施例中提供了一种可运行于上述网络架构上的信息传输方法，需要说明的是，本申请实施例中提供的上述信息传输方法的运行环境并不限于上述网络架构。
本申请实施例一所提供的方法实施例可以在移动终端、计算机终端或者类似的运算装置中执行。以运行在移动终端上为例，图2是本申请实施例的一种数据传输方法的移动终端的硬件结构框图。如图2所示，移动终端20可以包括一个或多个(图2中仅示出一个)处理器202(处理器202可以包括微处理器MCU或可编程逻辑器件FPGA等的处理装置)和用于存储数据的存储器204，在一些实施例中，上述移动终端还可以包括用于通信功能的传输装置206以及输入输出设备208。本领域普通技术人员可以理解，图2所示的结构仅为示意，并不 对上述移动终端的结构造成限定。例如，移动终端20还可包括比图2中所示更多或者更少的组件，或者具有与图2所示不同的配置。
存储器204可用于存储应用软件的软件程序以及模块，如本申请实施例中的数据传输方法对应的程序指令/模块，处理器202通过运行存储在存储器204内的软件程序以及模块，从而执行多种功能应用以及数据处理，即实现上述的方法。存储器204可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器204可进一步包括相对于处理器202远程设置的存储器，这些远程存储器可以通过网络连接至移动终端20。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
传输装置206用于经由一个网络接收或者发送数据。上述的网络实例可包括移动终端20的通信供应商提供的无线网络。在一个实例中，传输装置206包括一个网络适配器(Network Interface Controller，NIC)，该传输装置206可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输装置206可以为射频(Radio Frequency，RF)模块，该传输装置206用于通过无线方式与互联网进行通讯。
在本实施例中提供了一种运行于上述移动终端的数据传输方法，图3是根据本申请实施例的数据传输方法流程图，如图3所示，该方法包括如下步骤：
步骤S302中，第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息。
步骤S304中，进行sidelink承载配置。
步骤S306中，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
上述的待传输数据包可以是Sidelink数据包。
通过上述步骤，第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息，第一终端进行sidelink承载配置，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。采用上述方案，依据QoS相关的第一信息进行Sidelink业务传输，给出了适用于新无线中映射Sidelink承载的方案，解决了相关技术中缺乏适用于新无线中确定Sidelink承载方案的问题。
本申请文件中关于Sidelink承载的技术方案可以应用于逻辑信道中。
在一些实施例中，上述步骤的执行主体可以为车辆等移动终端。
在一些实施例中，所述第一信息，包括以下至少之一：第二信息，包括所述待传输数据包对应的第五代移动系统服务质量标识5QI和/或传输范围；第三信息，包括所述待传输数据包对应的以下信息至少之一：优先级、可靠性、传输时延、数据率、误包率、传输范围；第四信息，包括Sidelink的QoS规则rules；第五信息，包括Sidelink的QoS配置文件profile。
在一些实施例中，在所述第一信息为所述第二信息或第三信息时，第一终端获取关于直通链路Sidelink的服务质量QoS的第一信息，包括：所述第一终端从V2X应用层获取所述第二信息或所述第三信息。V2X可以是车与X元素之间数据传输，包括车车通信，车人通信，车与设备通信等。
在一些实施例中，在所述第一信息为所述第四信息和/或第五信息，第一终端获取关于直通链路Sidelink的服务质量QoS的第一信息，包括以下之一：所述第一终端从V2X控制功能实体获取所述第四信息和/或第五信息；所述第一终端从预配置信息中获取所述第四信息和/或第五信息；所述第一终端从网络侧接入及移动管理功能实体获取所述第四信息。
所述第四信息中包括以下信息至少之一：5QI、保证流比特率(Guaranteed Flow Bit Rate，简称为GFBR)、最大流比特率(Maximum Flow Bit Rate，简称为MFBR)、平均窗口。
在一些实施例中，所述Sidelink的QoS rules与所述第一终端的Uu(User equipment/用户设备，简称为Uu)接口的QoS rules相同，或与所述第一终端的Uu接口的QoS rules不同。
在一些实施例中，进行sidelink承载配置，包括以下之一：第一终端依据所述第四信息和/或第五信息，自主配置所述sidelink承载；所述第一终端发送Sidelink承载配置信息至第二终端，并接收所述第二终端反馈的Sidelink承载配置响应信息，依据所述Sidelink承载配置响应信息配置所述Sidelink承载。
在一些实施例中，所述Sidelink承载配置信息包括以下至少之一：承载标识，SDAP(Service Data Adaptation Protocol，业务数据适配协议)配置，PDCP(Packet Data Convergence Protocol，分组数据汇聚协议)配置，RLC(Radio Link Control，无线链路控制)配置，逻辑信道配置，镜像QoS指示，QoS参数。QoS参数包括多个信息5QI、GFBR、MFBR、averaging window
在一些实施例中，所述方法满足以下至少之一：
SDAP配置包括以下至少之一：空NULL，默认承载指示，映射到该承载的QoS flow列表，是否包含SDAP子头；
PDCP配置包括以下至少之一：包丢弃定时器，PDCP序列号长度，头压缩，重排序定时 器；
RLC配置包括以下至少之一：非确认模式或确认模式，确认模式下轮询相关配置，确认模式下最大重传次数，是否支持乱序投递；
逻辑信道配置包括以下至少之一：逻辑信道标识，逻辑信道优先级，优先保证比特率，桶大小持续时间，子载波间隔，关联的sidelink带宽部分(BandWidth Part，简称为BWP)索引，关联的载波指示；
QoS参数包括以下至少之一：5QI，分配保留优先级，UE PC5接口最大聚合比特率UE-PC5-AMBR，PC5保证流比特率GFBR，PC5最大流比特率MFBR，PC5镜像QoS指示，优先级，包延时，误包率，可靠性，资源类型。
在一些实施例中，所述Sidelink承载配置响应信息包括以下至少之一：所述第二终端支持的sidelink承载的列表；所述第二终端不支持的sidelink承载的列表。还可以包括所述第二终端不支持Sidelink承载的原因
在一些实施例中，进行sidelink承载配置，包括：所述第一终端接收基站发送的Sidelink承载配置信息；依据所述Sidelink承载配置信息配置所述Sidelink承载。
在一些实施例中，依据所述第一信息，将待传输数据包映射至所述Sidelink承载进行传输，包括以下之一：在所述第一信息为所述第二信息时，将关联第一5QI的待传输数据包映射至关联所述第一5QI的Sidelink承载上传输；在所述第一信息为所述第四信息时，依据所述Sidelink rules和Sidelink承载配置信息，将所述待传输数据包映射至对应的Sidelink承载上传输。
在一些实施例中，依据所述Sidelink rules将所述待传输数据包映射至对应的Sidelink承载上传输，包括：所述第一终端依据所述Sidelink rules将所述待传输数据包映射至QoS flow；所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输。
在一些实施例中，包括：在所述第一终端中，所述Sidelink SDAP实体与Uu SDAP实体相同，或者，所述Sidelink SDAP实体与Uu SDAP实体不同。
在一些实施例中，所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输，包括：
在所述Sidelink承载配置信息中SDAP配置信息中指示NULL或映射到Sidelink承载的 QoS flow列表为空时，由所述第一终端确定所述QoS flow与Sidelink承载的映射规则；
在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空时，所述第一终端依据该非空列表的映射关系将所述QoS flow映射到Sidelink承载进行传输；
在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空，且存在支持镜像QoS指示时，所述第一终端SDAP实体标记该QoS flow数据包对应的QoS流标识QFI。
在一些实施例中，所述QFI和QoS flow用于为对端UE更新第一映射关系提供依据，其中，所述第一映射关系为所述对端UE存储的QFI和Sidelink承载的映射关系。
在一些实施例中，依据所述第一信息，将待传输数据包映射至所述Sidelink承载传输至第二终端之后，所述第一终端获取业务切换信息；依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
在一些实施例中，所述业务切换信息，包括以下至少之一：应用层信息，接入层信息，基站配置的业务切换指示信息。
在一些实施例中，所述方法满足以下至少之一：
所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息，其中，所述QoS需求信息包括至少之一：优先级，时延，可靠性，传输率，数据率，传输范围；
所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5QoS flow与DRB(Data Radio Bearer，数据无线承载)的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与sidelink承载的映射关系。
在一些实施例中，Uu QoS flow信息包括：PDU session标识，QFI。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载；
所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5QoS rules映射至PC5QoS flow，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输；
所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输。
在一些实施例中，依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：所述第一终端向基站发送第一通知信息，所述基站依据所述第一通知信息更新DRB与QFI的映射关系；所述第一终端向所述第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
根据本申请文件的另一个实施例，还提供了一种业务切换方法，包括以下步骤：
步骤110，第一终端获取业务切换信息；
步骤210，依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
采用上述方案，第一终端获取业务切换信息，依据业务切换信息进行切换，给出了适用于新无线的Uu接口和PC5接口之间的业务切换方式，解决了相关技术中缺乏适用于新无线中的在Uu接口和PC5接口之间进行业务切换的方案的问题。
在一些实施例中，所述业务切换信息，包括以下至少之一：应用层信息，接入层信息，基站配置的业务切换指示信息。
在一些实施例中，所述方法满足以下至少之一：
所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息，其中，所述QoS需求信息包括至少之一：优先级，时延，可靠性，传输率，数据率，传输范围；
所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5QoS flow与DRB的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与sidelink承载的映射关系。
Uu QoS flow信息包括：PDU session标识，QFI。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端依据所述业务切换信息自主决定进行业务切换；
所述第一终端获取基站发送的业务切换指示信息，依据所述业务切换指示信息进行业务切换。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一:
依据所述业务切换信息进行针对每个数据包的业务切换；
依据所述业务切换信息进行针对每个QoS flow的业务切换。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载；
所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5QoS rules映射至PC5QoS flow，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输；
所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输；
在一些实施例中，所述第一终端依据所述业务切换信息确定在Uu接口传输数据时，依据QoS rules将待传输数据包映射至QoS flow,由所述第一终端的SDAP实体将所述QoS flow映射至数据无线承载DRB进行传输。
在一些实施例中，由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow或第八QoS flow映射到DRB中，包括以下之一：
由所述第一终端的SDAP实体依据sidelink承载配置中QoS flow与DRB映射关系将所述第六或第七或第八QoS flow映射至DRB传输；
在未配置所述QoS flow与DRB映射关系时，由所述第一终端的SDAP实体将所述第六或第七或第八QoS flow映射至默认DRB传输；
在未配置所述QoS flow与DRB映射关系时，所述第一终端发起会话请求建立新的会话并配置所述QoS flow与DRB映射关系，或所述第一终端发起会话请求修改当前会话并配置所述QoS flow与DRB映射关系。
在一些实施例中，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输之前，所述方法还包括，所述第一终端通过以下方式之一获取所述PC5QoS flow与Sidelink承载的第二映射关系：
由所述第一终端自主确定所述第二映射关系；
接收基站配置的所述第二映射关系；
由所述第一终端与对端终端协商确定所述第二映射关系；
依据对端终端的PC5QoS flow与Sidelink承载的第三映射关系进行镜像映射，获取所述第二映射关系。
在一些实施例中，依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：
所述第一终端向基站发送第一通知信息，用于指示在Uu接口传输的第十QoS flow被切换至PC5接口，所述基站依据所述第一通知信息更新DRB与QFI的映射关系，即第一通知信息可以指示将Uu接口中的哪些QoS flow进行了切换；基站根据指示的第一通知信息中QoS flow的QoS参数，为第一终端配置sidelink承载；
所述第一终端向所述第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
在一些实施例中，所述第一通知消息中包括用于指示在Uu接口传输的第十QoS flow被切换至PC5接口。
在一些实施例中，所述第一终端向基站发送第一通知信息之后，接收所述基站依据第十QoS flow的QoS参数为所述第一终端配置的Sidelink承载配置。
下面是本申请文件的具体实施例。
具体实施例1：基于5QI的QoS机制
方案1，V2X应用层将V2X packet关联到相应的5QI。V2X应用层将V2X packet传递给AS(接入，access)层时携带该packet对应的5QI。每个SL LCH(逻辑信道，Logical Channel)关联一个或多个5QI(SL LCH与5QI的映射关系由UE实现或eNB配置)。UE根据V2X packet关联的5QI将packet映射到关联相同5QI的SL LCH。
5QI可以是标准化的、预配置的或动态分配的。每个5QI包含以下至少之一：优先级，时延，误报率，资源类型，平均窗口(averaging window)。此外，V2X应用层将V2X packet传递给AS层时，还可以携带要求的传输范围(required transmission range)。
具体实施例1的另一个方案2，在R14V2X SL中，上层发送V2X数据包到AS层时携带V2X数据包的近距离通信数据包优先级(Prose Per Packet Priority，PPPP)(可以推导出PDB(packet delay budget，数据包延迟))及PPPR(ProSe per packet reliability，数据包可靠性)，每个SL LCH关联一个优先级，UE将数据包映射到具有相同优先级的SL LCH上传输。UE AS根据优先级得到delay后，将delay需求告诉物理层，物理层在资源选择时考虑delay。
可以考虑在R14机制基础上，V2X应用层将V2X数据包传递给AS层时，除了携带PPPP、PPPR，还携带数据传输率、传输范围。
方案1相比于方案2，V2X应用层只需提供一个5QI值而不是一组参数，减少开销。
具体实施例2：基于QoS flow的QoS机制
UE预配置有或从V2X control function获得sidelink QoS rules，用于将V2X packets映射到sidelink QoS flows；UE预配置有或从V2X control function获得sidelink QoS profiles，用于参考建立SL RB(sidelink radio bearer)。
图4是根据本申请文件的具体实施例2的UE数据映射示意图，如图4所示，UE根据sidelink QoS rules将V2X packets映射到QoS flows(每个QoS flow关联一个QFI)，UE根据QoS flow的QFI找到对应的QoS profile中的QoS参数，然后根据QoS参数建立SL RB；多个QoS flow可通过一个SL RB传输，QFI与SL RB的映射关系可由UE实现。sidelink增加SDAP层，通过SDAP层进行QoS flow到SL RB的映射，每个UE一个SDAP实体。对于sidelink 广播/组播通信，UE根据到达的数据包及数据包相应的QoS参数，自主建立sidelink承载。这种方式也可用于sidelink单播通信。
此外，对于sidelink单播通信，UE之间可以协商建立sidelink承载。在一些实施例中：
源UE向目标UE发送sidelink承载相关配置信息，包括以下至少之一：承载标识，SDAP配置，PDCP配置，RLC配置，逻辑信道配置，镜像QoS指示，QoS参数；其中，SDAP配置包括以下至少之一：NULL，默认承载指示，映射到该承载的QoS flow列表(QFIs)，是否包含SDAP子头；PDCP配置包括以下至少之一：包丢弃定时器，PDCP序列号长度，头压缩，重排序定时器；RLC配置包括以下至少之一：非确认模式或确认模式，确认模式下轮询相关配置，确认模式下最大重传次数，是否乱序投递；逻辑信道配置包括以下至少之一：逻辑信道标识，逻辑信道优先级，优先保证比特率，桶大小持续时间，子载波间隔，关联的sidelink BWP索引，关联的载波指示。如果SDAP配置中指示NULL或映射到该承载的QoS flow列表为空，则QoS flow到SL RB的映射关系由发送UE自己实现；如果映射到该承载的QoS flow列表非空，则UE双方按照该映射关系进行QoS flow到SL RB的映射；如果映射到该承载的QoS flow列表非空，并且有支持镜像QoS指示，UE SDAP实体标记数据包对应的QFI，对端UE可以根据数据包的QFI标记及对端UE的SL RB配置，更新SL RB与QFI(QoS flow)的映射关系。QoS参数包括以下至少之一：5QI，分配保留优先级，UE PC5接口最大聚合比特率UE-PC5-AMBR，PC5保证流比特率GFBR，PC5最大流比特率MFBR，PC5镜像QoS指示，优先级，包延时，误包率，可靠性，资源类型。
目标UE收到sidelink承载配置信息后，评估是否可以支持这些sidelink承载配置，并反馈sidelink承载配置响应信息，包括：可支持的sidelink承载列表，不支持的sidelink承载列表，不支持原因等。不支持原因可能是：不能保证QoS需求，sidelink资源不足，sidelink资源冲突概率高等。
Sidelink承载相关配置信息及sidelink承载配置响应信息可以是独立的PC5信令消息，或携带在PC5连接建立及响应消息中。图5是根据本申请文件的具体实施例2的Sidelink单播承载配置示意图。
此外，对于连接态UE，可以由基站为UE配置sidelink承载。UE NAS从AMF获得sidelink QoS rules，将V2X packet映射到QoS flow；gNB从AMF获得QoS profiles为UE配置sidelink承载，以及可选的SL RB与QoS flow(QFI)的映射关系；UE SDAP实体将QoS flow映射到SL RB传输。其中，sidelink QoS rules可以与Uu QoS rules通用。gNB为UE配置sidelink 承载包括以下至少之一：承载标识，SDAP配置，PDCP配置，RLC配置，逻辑信道配置，镜像QoS指示，QoS参数。
关于接收UE的SL RB相关配置：1)gNB通过广播消息广播该发送UE(通过发送UE的dest(目的)ID标识)的SL RB相关配置信息；2)如果gNB知道该发送UE的对端UE(连接态)，则可由gNB为对端UE配置SL RB；3)由发送UE发送SL RB配置给接收端UE。
具体实施例3，业务切换Traffic switch：
基于具体实施例1的QoS框架的业务切换：
Uu到PC5业务切换traffic switch：
UE1在覆盖内，UE1通过NR空口发送V2X消息(V2V/V2I/V2N/V2P)，然后网络将一些特定的V2X消息发送给感兴趣的UE。
如果UE可获得PC5通信资源，当Uu接口负荷较大或出现拥塞或有些业务时延QoS无法满足或Uu接口链路质量变差，而PC5接口负荷小、资源充足、信道忙闲率低时，可以考虑将部分V2V业务切换到PC5接口传输。
如果UE检测到原本通过Uu接口通信的一特定的对端UE移动到邻近服务范围，通过sidelink discovery发现该对端UE，应用层可识别通过Uu通信和SL discovery发现的UE是同一UE，UE与对端UE建立PC5连接，当Uu接口负荷较大或出现拥塞或有些业务时延QoS无法满足或Uu接口链路质量变差时，将部分V2V业务切换到PC5接口传输。
对于PC5到Uu业务切换，当UE检测到进入覆盖内，与基站建立RRC连接，如果PC5接口出现拥塞或信道忙闲率较高或资源冲突概率大或PC5链路质量变差，UE可将PC5接口业务切换到Uu接口传输。
关于traffic switch有如下两种方法：
1)基于V2X packet切换，
图6是根据本申请文件具体实施例3的基于V2X数据包的业务切换示意图，如图6所示，对于Uu到PC5，应用层根据业务类型、时延、可靠性等，将原本通过Uu传输的V2V packet切换到PC5接口传输，将packet关联5QI，提供给AS layer，每个SL LCH关联一个或多个5QI，AS layer将packet映射到关联相同5QI的SL LCH；AS layer需要提供Uu接口负荷情况、 Uu链路质量、PC5接口状态(连接/可用)、PC5资源使用率、PC5信道忙闲率、PC5链路质量等信息；
类似地，对于PC5到Uu，UE应用层将原本PC5传输的packet切换到Uu，通过Uu QoS rules将packet映射到QoS flow，而后UE SDAP实体将QoS flow映射到相应DRB传输。
2)基于QoS flow或5QI切换，
图7是根据本申请文件具体实施例3的Uu接口业务到PC5的业务切换流程图，如图7所示，对于Uu到PC5，将原本通过Uu接口传输的QoS flow(每个QoS flow有相应的QFI及5QI)切换/映射到SL LCH(SL LCH关联5QI)。这种方式下，需要应用层提供QoS flow对应的业务类型，从而确定切换哪些QoS flow，AS layer提供Uu接口及PC5接口的连接状态、拥塞情况、资源情况、链路质量等；UE结合应用层及AS layer信息综合决定切换哪些QoS flow到PC5接口。
图8是根据本申请文件具体实施例3的PC5接口到Uu接口业务的切换流程图，对于PC5到Uu，基于5QI，将原本通过PC5接口传输的关联一个特定的5QI的V2X packets映射到Uu接口的具有相同5QI的QoS flow或作为一个新的QoS flow，然后根据Uu接口的QoS flow到DRB的映射关系映射到DRB传输，如果没有配置该QoS flow与DRB的映射关系，则将该QoS flow映射到default DRB，或者发起PDU session modification(PDU会话修改)/request过程建立新的DRB或更新QoS flow与DRB的映射关系来传输该QoS flow。
具体实施例4，基于具体实施例2的QoS框架的业务切换说明如下：
同上，Uu接口与PC5接口之间业务切换有如下两种方法：
1)以packet为粒度切换，
图9是根据本申请文件的具体实施例4的基于V2X数据包的业务切换示意图，如图9所示，对于Uu到PC5业务切换，应用层确定哪些是V2V业务，并基于业务QoS需求选择将一些V2V业务切换到PC5接口传输，应用层根据PC5QoS rules将V2X packet映射到QoS flow(PC5)并递交给AS层(PC5)，UE SDAP实体将PC5QoS flow映射到SL RB传输，其中PC5QoS flow与SL RB的映射关系可由UE实现或gNB配置。需要AS layer提供Uu接口及PC5接口状态(是否RRC/PC5连接状态)、拥塞情况、资源使用情况、链路质量等信息。
类似地，对于PC5到Uu业务切换，应用层基于业务QoS需求将一些PC5接口业务切换到Uu接口传输，然后通过Uu QoS rules映射到QoS flow(Uu)，常规Uu接口数据路由处理。
2)以QoS flow为粒度切换，
图10是根据本申请文件的具体实施例4的基于QoS flow的业务切换示意图，如图10所示，对于Uu到PC5业务切换，UE应用层提供QoS flow对应的业务类型及QoS需求，AS layer提供Uu接口和或PC5接口状态、拥塞情况、资源使用情况、链路质量、PC5接口SL RB及Uu接口DRB情况。UE综合应用层信息及AS层信息决定是否从Uu接口切换一些业务到PC5接口传输以及切换哪些QoS flow业务。UE上层向SDAP layer指示QoS flow通过Uu还是PC5传输，通过PC5传输的QoS flow，UE SDAP实体将QoS flow映射到sidelink承载上传输，QoS flow与SL RB的映射关系可以由UE实现或gNB配置。如果从Uu切换到PC5的一些特定的QoS flow没有合适的SL RB，则需要先建立合适的SL RB。
类似地，对于PC5到Uu业务切换，UE综合应用层信息及AS层信息决定是否将PC5接口一些业务切换Uu接口传输以及切换哪些QoS flow业务。UE上层向SDAP layer指示QoS flow通过Uu还是PC5传输，通过Uu传输的QoS flow，UE SDAP实体根据配置的QoS flow与DRB的映射关系将QoS flow映射到DRB传输，并对数据包标记QFI。如果Uu接口没有配置该QoS flow与DRB的映射关系，则将该QoS flow映射到default DRB，或者发起PDU session modification/request过程建立新的DRB或更新QoS flow与DRB的映射关系来传输该QoS flow。
具体实施例5，业务切换信令流程：
本实施例以从Uu接口切换V2V业务到PC5接口进行sidelink单播通信为例，说明业务切换信令流程。UE1与UE2原本通过Uu接口进行V2X通信，如果UE1检测到UE2移动到邻近服务范围，通过sidelink discovery发现该对端UE2，应用层可识别通过Uu通信和SL discovery发现的UE是同一UE。UE1通过sidelink discovery发现UE2之后，通过自主决定方式或基站控制方式进行业务切换。在一些实施例中：
1)UE1自主决定将Uu接口一些特定的V2V业务切换到PC5接口传输，以缓解Uu负荷。在一些实施例中，UE1从基站获取业务切换相关信息，包括以下至少之一：Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值；比如，当Uu链路质量低于阈值，或PC5链路质量高于阈值，则可以考虑业务切换，或者对于时延要求高于阈值，或可靠性要求低于阈值的业务可以考虑切换到PC5接口传输。UE1测量Uu链路质量及PC5链路质量，与UE2建立PC5连接及承载配置协商，自主决定(可参考基站配置)将一些特定的Uu接口传输的V2V业务切换到PC5接口传输，具体业务切换根据sidelink QoS机制(方案 1-基于5QI QoS机制，或方案2-基于QoS flow QoS机制)又存在两种方法(基于packet切换，或基于QoS flow切换)。本实施例以基于方案2的QoS flow切换为例。UE将切换的Uu QoS flow映射到sidelink承载传输，并通知gNB哪些QoS flow(PDU session ID，QFI)切换到PC5，在一些实施例中，UE1及gNB更新QFI与DRB的映射关系。具体流程如图11所示，图11是根据本申请具体实施例5的Uu接口到PC5业务切换流程示意图一。
2)基站控制业务切换。在一些实施例中，UE1通过sidelink discovery发现UE2后，UE1向gNB上报发现UE2，及PC5链路质量，基站下发traffic switch指示。UE1执行Uu到PC5业务切换，UE1结合应用层信息及接入层信息决定Uu接口哪些QoS flow(QFI)切换到PC5接口(Uu QFI->SL RB)。在一些实施例中，UE1向gNB上报切换哪些QoS flow(PDU session ID，QFI)，eNB根据这些QoS flow的QoS参数，为UE1配置sidelink承载。UE1与UE2建立PC5连接，并发送sidelink承载配置给UE2，UE1将切换的Uu QoS flow映射到SL RB传输。流程如图12所示，图12是根据本申请具体实施例5的Uu接口到PC5业务切换流程示意图二。
本实施例以从PC5接口sidelink单播通信切换V2V业务到Uu接口传输为例，说明业务切换信令流程。UE1与UE2通过sidelink discovery发现后建立PC5连接并协商sidelink承载后进行sidelink通信。一段时间后，UE1检测到网络覆盖，并与gNB建立RRC连接。UE1进入RRC连接态之后，可自主决定是否以及何时切换PC5接口V2V业务到Uu接口传输。在一些实施例中，UE1向gNB上报PC5接口状态信息，如：PC5链路质量，PC5拥塞情况，PC5信道忙闲率，PC5资源冲突情况，PC5承载及相应QoS参数信息，PC5承载与PC5QoS flow映射关系等。基站下发业务切换指示信息，包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，切换的PC5QoS flow信息(QFI)，切换的PC5QoS flow与DRB的映射关系。UE1自主决定或根据gNB配置信息将PC5QoS flow切换到Uu接口传输。如果gNB没有配置切换的PC5QoS flow(或相同QFI)与DRB的映射关系，或没有合适的DRB，则UE1发起PDU session modification/request消息，更新DRB与QoS flow的映射关系或新建DRB及配置映射的QoS flow。在一些实施例中，UE1与UE2更新PC5QoS flow与SL RB的映射关系或者释放PC5连接。流程如图13所示，图13是根据本申请具体实施例5的PC5到Uu业务切换流程示意图。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡 献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括一个或多个指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本申请多个实施例所述的方法。
实施例二
在本实施例中还提供了一种数据传输的装置和业务切换装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
根据本申请文件的一个实施例，提供了一种数据传输的装置，包括：
第一获取模块，设置为获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；
第一配置模块，设置为进行sidelink承载配置；
第一映射模块，设置为依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
采用上述方案，依据QoS相关的第一信息进行Sidelink业务传输，给出了适用于新无线中映射Sidelink承载的方案，解决了相关技术中缺乏适用于新无线中确定Sidelink承载方案的问题。
本申请文件中关于Sidelink承载的技术方案可以应用于逻辑信道中。
在一些实施例中，上述步骤的执行主体可以为车辆等移动终端，但不限于此。
在一些实施例中，所述第一信息，包括以下至少之一：第二信息，包括所述待传输数据包对应的第五代移动系统服务质量标识5QI和/或传输范围；第三信息，包括所述待传输数据包对应的以下信息至少之一：优先级、可靠性、传输时延、数据率、误包率、传输范围；第四信息，包括Sidelink的QoS规则rules；第五信息，包括Sidelink的QoS配置文件profile。
在一些实施例中，在所述第一信息为所述第二信息或第三信息时，第一终端获取关于直通链路Sidelink的服务质量QoS的第一信息，包括：所述第一终端从V2X应用层获取所述第二信息或所述第三信息。
在一些实施例中，在所述第一信息为所述第四信息和/或第五信息，第一终端获取关于直通链路Sidelink的服务质量QoS的第一信息，包括以下之一：所述第一终端从V2X控制功能实体获取所述第四信息和/或第五信息；所述第一终端从预配置信息中获取所述第四信息和/ 或第五信息；所述第一终端从网络侧接入及移动管理功能实体获取所述第四信息。
所述第四信息中包括以下信息至少之一：5QI、保证流比特率(Guaranteed Flow Bit Rate，简称为GFBR)、最大流比特率(Maximum Flow Bit Rate，简称为MFBR)、平均窗口。
在一些实施例中，所述Sidelink的QoS rules与所述第一终端的Uu接口的QoS rules相同，或与所述第一终端的Uu接口的QoS rules不同。
在一些实施例中，进行sidelink承载配置，包括以下之一：第一终端依据所述第四信息和/或第五信息，自主配置所述sidelink承载；所述第一终端发送Sidelink承载配置信息至第二终端，并接收所述第二终端反馈的Sidelink承载配置响应信息，依据所述Sidelink承载配置响应信息配置所述Sidelink承载。
在一些实施例中，所述Sidelink承载配置信息包括以下至少之一：承载标识，SDAP配置，PDCP配置，RLC配置，逻辑信道配置，镜像QoS指示，QoS参数。QoS参数包括多个信息5QI、GFBR、MFBR、averaging window
在一些实施例中，所述方法满足以下至少之一：
SDAP配置包括以下至少之一：空NULL，默认承载指示，映射到该承载的QoS flow列表，是否包含SDAP子头；
PDCP配置包括以下至少之一：包丢弃定时器，PDCP序列号长度，头压缩，重排序定时器；
RLC配置包括以下至少之一：非确认模式或确认模式，确认模式下轮询相关配置，确认模式下最大重传次数，是否支持乱序投递；
逻辑信道配置包括以下至少之一：逻辑信道标识，逻辑信道优先级，优先保证比特率，桶大小持续时间，子载波间隔，关联的sidelink带宽部分(BandWidth Part，简称为BWP)索引，关联的载波指示；
QoS参数包括以下至少之一：5QI，分配保留优先级，UE PC5接口最大聚合比特率UE-PC5-AMBR，PC5保证流比特率GFBR，PC5最大流比特率MFBR，PC5镜像QoS指示，优先级，包延时，误包率，可靠性，资源类型。
在一些实施例中，所述Sidelink承载配置响应信息包括以下至少之一：所述第二终端支持的sidelink承载的列表；所述第二终端不支持的sidelink承载的列表。还可以包括所述第二 终端不支持Sidelink承载的原因
在一些实施例中，进行sidelink承载配置，包括：所述第一终端接收基站发送的Sidelink承载配置信息；依据所述Sidelink承载配置信息配置所述Sidelink承载。
在一些实施例中，依据所述第一信息，将待传输数据包映射至所述Sidelink承载进行传输，包括以下之一：在所述第一信息为所述第二信息时，将关联第一5QI的待传输数据包映射至关联所述第一5QI的Sidelink承载上传输；在所述第一信息为所述第四信息时，依据所述Sidelink rules和Sidelink承载配置信息，将所述待传输数据包映射至对应的Sidelink承载上传输。
在一些实施例中，依据所述Sidelink rules将所述待传输数据包映射至对应的Sidelink承载上传输，包括：所述第一终端依据所述Sidelink rules将所述待传输数据包映射至QoS flow；所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输。
在一些实施例中，包括：在所述第一终端中，所述Sidelink SDAP实体与Uu SDAP实体相同，或者，所述Sidelink SDAP实体与Uu SDAP实体不同。
在一些实施例中，所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输，包括：
在所述Sidelink承载配置信息中SDAP配置信息中指示NULL或映射到Sidelink承载的QoS flow列表为空时，由所述第一终端确定所述QoS flow与Sidelink承载的映射规则；
在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空时，所述第一终端依据该非空列表的映射关系将所述QoS flow映射到Sidelink承载进行传输；
在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空，且存在支持镜像QoS指示时，所述第一终端SDAP实体标记该QoS flow数据包对应的QoS流标识QFI。
在一些实施例中，所述QFI和QoS flow用于为对端UE更新第一映射关系提供依据，其中，所述第一映射关系为所述对端UE存储的QFI和Sidelink承载的映射关系。
在一些实施例中，依据所述第一信息，将待传输数据包映射至所述Sidelink承载传输至第二终端之后，所述第一终端获取业务切换信息；依据所述业务切换信息进行业务切换，其 中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
在一些实施例中，所述业务切换信息，包括以下至少之一：应用层信息，接入层信息，基站配置的业务切换指示信息。
在一些实施例中，所述方法满足以下至少之一：
所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息，其中，所述QoS需求信息包括至少之一：优先级，时延，可靠性，传输率，数据率，传输范围；
所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5QoS flow与DRB的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与sidelink承载的映射关系。
在一些实施例中，Uu QoS flow信息包括：PDU session标识，QFI。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载；
所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第 一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5QoS rules映射至PC5QoS flow，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输；
所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输。
在一些实施例中，依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：所述第一终端向基站发送第一通知信息，所述基站依据所述第一通知信息更新DRB与QFI的映射关系；所述第一终端向所述第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
根据本申请文件的另一个实施例，还提供了一种业务切换装置，包括：
第二获取模块，设置为第一终端获取业务切换信息；
第二切换模块，设置为依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在Uu接口和PC5接口之间切换。
采用上述方案，第一终端获取业务切换信息，依据业务切换信息进行切换，给出了适用于新无线的Uu接口和PC5接口之间的业务切换方式，解决了相关技术中缺乏适用于新无线中的在Uu接口和PC5接口之间进行业务切换的方案的问题。
在一些实施例中，所述业务切换信息，包括以下至少之一：应用层信息，接入层信息，基站配置的业务切换指示信息。
在一些实施例中，所述方法满足以下至少之一：
所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息，其中，所述QoS需求信息包括至少之一：优先级，时延，可靠性，传输率，数据率，传 输范围；
所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5QoS flow与DRB的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与sidelink承载的映射关系。
Uu QoS flow信息包括：PDU session标识，QFI
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端依据所述业务切换信息自主决定进行业务切换；
所述第一终端获取基站发送的业务切换指示信息，依据所述业务切换指示信息进行业务切换。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一:
依据所述业务切换信息进行针对每个数据包的业务切换；
依据所述业务切换信息进行针对每个QoS flow的业务切换。
在一些实施例中，依据所述业务切换信息进行业务切换，包括以下之一：
所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载；
所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5QoS rules映射至PC5QoS flow，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输；
所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输；
在一些实施例中，所述第一终端依据所述业务切换信息确定在Uu接口传输数据时，依据QoS rules将待传输数据包映射至QoS flow,由所述第一终端的SDAP实体将所述QoS flow映射至数据无线承载DRB进行传输。
在一些实施例中，由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow或第八QoS flow映射到DRB中，包括以下之一：
由所述第一终端的SDAP实体依据sidelink承载配置中QoS flow与DRB映射关系将所述第六或第七或第八QoS flow映射至DRB传输；
在未配置所述QoS flow与DRB映射关系时，由所述第一终端的SDAP实体将所述第六或第七或第八QoS flow映射至默认DRB传输；
在未配置所述QoS flow与DRB映射关系时，所述第一终端发起会话请求建立新的会话并配置所述QoS flow与DRB映射关系，或所述第一终端发起会话请求修改当前会话并配置所述QoS flow与DRB映射关系。
在一些实施例中，由所述第一终端SDAP实体将所述PC5QoS flow映射至Sidelink承载进行传输之前，所述方法还包括，所述第一终端通过以下方式之一获取所述PC5QoS flow与Sidelink承载的第二映射关系：
由所述第一终端自主确定所述第二映射关系；
接收基站配置的所述第二映射关系；
由所述第一终端与对端终端协商确定所述第二映射关系；
依据对端终端的PC5QoS flow与Sidelink承载的第三映射关系进行镜像映射，获取所述第二映射关系。
在一些实施例中，依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：
所述第一终端向基站发送第一通知信息，用于指示在Uu接口传输的第十QoS flow被切换至PC5接口，所述基站依据所述第一通知信息更新DRB与QFI的映射关系，即第一通知信息可以指示将Uu接口中的哪些QoS flow进行了切换；基站根据指示的第一通知信息中QoS flow的QoS参数，为第一终端配置sidelink承载；
所述第一终端向所述第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
在一些实施例中，所述第一通知消息中包括用于指示在Uu接口传输的第十QoS flow被切换至PC5接口。
在一些实施例中，所述第一终端向基站发送第一通知信息之后，接收所述基站依据第十QoS flow的QoS参数为所述第一终端配置的Sidelink承载配置。
需要说明的是，上述多个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述多个模块以任意组合的形式分别位于不同的处理器中。
实施例三
本申请的实施例还提供了一种存储介质。在一些实施例中，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，步骤S302中，第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；
S2，步骤S304中，进行sidelink承载配置；
S3，步骤S306中，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
在一些实施例中，存储介质还被设置为存储用于执行以下步骤的程序代码：
在一些实施例中，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等多种可以存储程序代码的介质。
本申请的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
在一些实施例中，上述电子装置还可以包括传输装置以及输入输出设备，其中，该传输装置和上述处理器连接，该输入输出设备和上述处理器连接。
在一些实施例中，在本实施例中，上述处理器可以被设置为通过计算机程序执行以下步骤：
S1，步骤S302中，第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；
S2，步骤S304中，进行sidelink承载配置；
S3，步骤S306中，依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
在一些实施例中，本实施例中的示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
在一些实施例中，本实施例中的示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本申请的多个模块或多个步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，在一些实施例中，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在一些特定的情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成多个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请不限制于任何特定的硬件和软件结合。

Claims (30)

  1. 一种数据传输方法，包括：
    第一终端获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；
    进行Sidelink承载配置；
    依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
  2. 根据权利要求1所述的方法，其中，所述第一信息，包括以下至少之一：
    第二信息，包括所述待传输数据包对应的第五代移动系统服务质量标识5QI和传输范围中至少之一；
    第三信息，包括所述待传输数据包对应的以下信息中的至少之一：优先级、可靠性、传输时延、数据率、误包率、传输范围；
    第四信息，包括Sidelink的QoS规则rules；
    第五信息，包括Sidelink的QoS配置文件profile。
  3. 根据权利要求1所述的方法，其中，所述进行Sidelink承载配置，包括：
    所述第一终端接收基站发送的Sidelink承载配置信息；
    依据所述Sidelink承载配置信息配置所述Sidelink承载。
  4. 根据权利要求2所述的方法，其中，所述进行Sidelink承载配置，包括以下之一：
    第一终端依据所述第四信息和第五信息中至少之一，自主配置所述Sidelink承载；
    所述第一终端发送Sidelink承载配置信息至第二终端，并接收所述第二终端反馈的Sidelink承载配置响应信息，依据所述Sidelink承载配置响应信息配置所述Sidelink承载。
  5. 根据权利要求3或4所述的方法，其中，所述Sidelink承载配置信息包括以下至少之一：
    承载标识，业务数据适配协议SDAP配置，分组数据汇聚协议PDCP配置，无线链路控制RLC配置，逻辑信道配置，镜像QoS指示，QoS参数。
  6. 根据权利要求5所述的方法，其中，所述方法满足以下至少之一：
    SDAP配置包括以下至少之一：空NULL，默认承载指示，映射到承载的QoS flow列表，是否包含SDAP子头；
    PDCP配置包括以下至少之一：包丢弃定时器，PDCP序列号长度，头压缩，重排序定时器；
    RLC配置包括以下至少之一：非确认模式或确认模式，确认模式下轮询相关配置，确认模式下最大重传次数，是否支持乱序投递；
    逻辑信道配置包括以下至少之一：逻辑信道标识，逻辑信道优先级，优先保证比特率，桶大小持续时间，子载波间隔，关联的Sidelink BWP索引，关联的载波指示；
    QoS参数包括以下至少之一：5QI，分配保留优先级，UE PC5接口最大聚合比特率UE-PC5-AMBR，PC5保证流比特率GFBR，PC5最大流比特率MFBR，PC5镜像QoS指示，优先级，包延时，误包率，可靠性，资源类型。
  7. 根据权利要求4所述的方法，其中，所述Sidelink承载配置响应信息包括以下至少之一：
    所述第二终端支持的Sidelink承载的列表；
    所述第二终端不支持的Sidelink承载的列表。
  8. 根据权利要求4所述的方法，其中，所述依据所述第一信息，将待传输数据包映射至所述Sidelink承载进行传输，包括以下之一：
    在所述第一信息为所述第二信息时，将关联第一5QI的待传输数据包映射至关联所述第一5QI的Sidelink承载上传输；
    在所述第一信息为所述第四信息时，依据所述Sidelink rules和Sidelink承载配置信息，将所述待传输数据包映射至对应的Sidelink承载上传输。
  9. 根据权利要求8所述的方法，其中，所述依据所述Sidelink rules将所述待传输数据包映射至对应的Sidelink承载上传输，包括：
    所述第一终端依据所述Sidelink rules将所述待传输数据包映射至QoS flow；
    所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输。
  10. 根据权利要求9所述的方法，其中，所述第一终端的Sidelink SDAP实体将所述QoS flow映射到Sidelink承载进行传输，包括：
    在所述Sidelink承载配置信息中SDAP配置信息中指示NULL或映射到Sidelink承载的QoS flow列表为空的情况下，由所述第一终端确定所述QoS flow与Sidelink承载的映射规则；
    在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空的情况下，所述第一终端依据该非空列表的映射关系将所述QoS flow映射到Sidelink承载进行传输；
    在所述Sidelink承载配置信息中SDAP配置信息中指示映射到Sidelink承载的QoS flow列表为非空，且存在支持镜像QoS指示的情况下，所述第一终端SDAP实体标记该QoS flow数据包对应的QoS流标识QFI。
  11. 根据权利要求10所述的方法，其中，所述QFI用于为对端UE更新第一映射关系提供依据，其中，所述第一映射关系为所述对端UE存储的QFI和Sidelink承载的映射关系。
  12. 根据权利要求1所述的方法，其中，所述依据所述第一信息，将待传输数据包映射至所述Sidelink承载传输至第二终端之后，所述方法还包括：
    所述第一终端获取业务切换信息；
    依据所述业务切换信息进行业务切换，其中，所述业务切换用于将所述待传输数据包在用户设备Uu接口和PC5接口之间切换。
  13. 根据权利要求12所述的方法，其中，所述业务切换信息，包括以下至少之一：
    应用层信息，接入层信息，基站配置的业务切换指示信息。
  14. 根据权利要求13所述的方法，其中，所述方法满足以下至少之一：
    所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息；
    所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
    所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5 QoS flow与DRB的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与Sidelink承载的映射关系。
  15. 根据权利要求12所述的方法，其中，所述依据所述业务切换信息进行业务切换，包括以下之一：
    所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
    所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载传输；
    所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
    所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
    所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5 QoS rules映射至PC5 QoS flow，由所述第一终端SDAP实体将所述 PC5 QoS flow映射至Sidelink承载进行传输；
    所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
    所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输。
  16. 根据权利要求12所述的方法，其中，所述依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：
    所述第一终端向基站发送第一通知信息，所述基站依据所述第一通知信息更新数据无线电承载DRB与QFI的映射关系；
    所述第一终端向所述第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
  17. 一种业务切换方法，包括：
    第一终端获取业务切换信息；
    依据所述业务切换信息进行业务切换，其中，所述业务切换用于将待传输数据包在用户设备Uu接口和PC5接口之间切换。
  18. 根据权利要求17所述的方法，其中，所述业务切换信息，包括以下至少之一：
    应用层信息，接入层信息，基站配置的业务切换指示信息。
  19. 根据权利要求18所述的方法，其中，所述方法满足以下至少之一：
    所述应用层信息包括以下至少之一：数据包业务类型，QoS flow业务类型，QoS需求信息；
    所述接入层信息包括以下至少之一：Uu接口链路质量，Uu接口参考信号接收功率，Uu接口承载及QoS参数，Uu接口拥塞程度，PC5接口链路质量，PC5连接建立状态，PC5接口信道忙闲率，PC5接口发现信号接收功率，PC5接口同步信号接收功率，PC5接口资源冲突概率，PC5接口拥塞情况，PC5接口承载及QoS参数；
    所述基站配置的业务切换指示信息包括以下至少之一：业务切换指示，Uu链路质量阈值，PC5链路质量阈值，延时阈值，可靠性阈值，数据率阈值，业务类型，应用类型，切换的PC5QoS flow服务质量流标识QFI，切换的PC5 QoS flow与DRB的映射关系，切换的Uu QoS flow信息，切换的Uu QoS flow与Sidelink承载的映射关系。
  20. 根据权利要求18所述的方法，其中，所述依据所述业务切换信息进行业务切换，包 括以下之一：
    所述第一终端依据所述业务切换信息自主决定进行业务切换；
    所述第一终端获取基站发送的业务切换指示信息，依据所述业务切换指示信息进行业务切换。
  21. 根据权利要求17所述的方法，其中，所述依据所述业务切换信息进行业务切换，包括以下之一:
    依据所述业务切换信息进行针对每个数据包的业务切换；
    依据所述业务切换信息进行针对每个QoS flow的业务切换。
  22. 根据权利要求17所述的方法，其中，所述依据所述业务切换信息进行业务切换，包括以下之一：
    所述第一终端应用层确定第四数据包通过Uu接口传输时，所述第一终端将所述第四数据包通过Uu接口QoS rules映射到第四QoS flow，所述第一终端SDAP实体将所述第四QoS flow映射至DRB传输；
    所述第一终端应用层确定第五数据包通过PC5接口传输时，所述第一终端应用层为第五数据包设置对应第五5QI，所述第一终端将所述第五数据包映射至关联所述第五5QI的Sidelink承载；
    所述第一终端将Uu接口传输的第四QFI的QoS flow，切换映射至PC5接口中关联相同5QI或所述第四QFI的Sidelink承载上；
    所述第一终端获取PC5接口关联第六5QI的第六数据包，将所述第六数据包映射到Uu接口中所述第六5QI的第六QoS flow中，或者映射至新建立的第七QoS flow中；由所述第一终端SDAP实体将所述第六QoS flow或第七QoS flow映射到DRB中；
    所述第一终端依据所述业务切换信息确定第七数据包在PC5接口传输时，所述第一终端将第七数据包通过PC5 QoS rules映射至PC5 QoS flow，由所述第一终端SDAP实体将所述PC5 QoS flow映射至Sidelink承载进行传输；
    所述第一终端依据QoS rules将数据包映射到第八QoS flow后，在确定将所述第八QoS flow通过Uu接口传输时，向所述第一终端SDAP实体指示传输路径的第八信息，所述第一终端SDAP实体依据所述第八信息将所述第八QoS flow映射到DRB传输；
    所述第一终端依据QoS rules将数据包映射到第九QoS flow后，在确定将所述第九QoS flow通过PC5接口传输时，向所述第一终端SDAP实体指示传输路径的第九信息，所述第一终端SDAP实体依据所述第九信息将所述第九QoS flow映射到Sidelink承载进行传输。
  23. 根据权利要求22所述的方法，其中，由所述第一终端SDAP实体将所述第六QoS flow 或第七QoS flow或第八QoS flow映射到DRB中，包括以下之一：
    由所述第一终端的SDAP实体依据Sidelink承载配置中QoS flow与DRB映射关系将所述第六或第七或第八QoS flow映射至DRB传输；
    在未配置所述QoS flow与DRB映射关系时，由所述第一终端的SDAP实体将所述第六或第七或第八QoS flow映射至默认DRB传输；
    在未配置所述QoS flow与DRB映射关系时，所述第一终端发起会话请求建立新的会话并配置所述QoS flow与DRB映射关系，或所述第一终端发起会话请求修改当前会话并配置所述QoS flow与DRB映射关系。
  24. 根据权利要求22所述的方法，其中，由所述第一终端SDAP实体将所述PC5 QoS flow映射至Sidelink承载进行传输之前，所述方法还包括，所述第一终端通过以下方式之一获取所述PC5 QoS flow与Sidelink承载的第二映射关系：
    由所述第一终端自主确定所述第二映射关系；
    接收基站配置的所述第二映射关系；
    由所述第一终端与对端终端协商确定所述第二映射关系；
    依据对端终端的PC5接口QoS flow与Sidelink承载的第三映射关系进行镜像映射，获取所述第二映射关系。
  25. 根据权利要求17所述的方法，其中，依据所述业务切换信息进行业务切换之后，所述方法还包括以下至少之一：
    所述第一终端向基站发送第一通知信息，用于指示在Uu接口传输的第十QoS flow被切换至PC5接口，所述基站依据所述第一通知信息更新DRB与QFI的映射关系；
    所述第一终端向第二终端发送第二通知消息，其中，所述第二终端依据所述第二通知消息更新Sidelink承载与QFI的映射关系，或者释放与所述第一终端的PC5连接。
  26. 根据权利要求25所述的方法，其中，所述第一终端向基站发送第一通知信息之后，所述方法还包括：
    接收所述基站依据第十QoS flow的QoS参数为所述第一终端配置的Sidelink承载配置。
  27. 一种数据传输装置，包括：
    第一获取模块，设置为获取直通链路Sidelink待传输数据包的服务质量QoS的第一信息；
    第一配置模块，设置为进行Sidelink承载配置；
    第一映射模块，设置为依据所述第一信息，将待传输数据包映射至Sidelink承载传输至第二终端。
  28. 一种业务切换装置，包括：
    第二获取模块，设置为第一终端获取业务切换信息；
    第二切换模块，设置为依据所述业务切换信息进行业务切换，其中，所述业务切换用于将待传输数据包在Uu接口和PC5接口之间切换。
  29. 一种存储介质，其中，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行所述权利要求1至26任一项中所述的方法。
  30. 一种电子装置，包括存储器和处理器，其中，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行所述权利要求1至26任一项中所述的方法。
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