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WO2021134701A1 - D2d通信方法、装置及系统 - Google Patents

D2d通信方法、装置及系统 Download PDF

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Publication number
WO2021134701A1
WO2021134701A1 PCT/CN2019/130943 CN2019130943W WO2021134701A1 WO 2021134701 A1 WO2021134701 A1 WO 2021134701A1 CN 2019130943 W CN2019130943 W CN 2019130943W WO 2021134701 A1 WO2021134701 A1 WO 2021134701A1
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WO
WIPO (PCT)
Prior art keywords
terminal
side link
request
slice
identification information
Prior art date
Application number
PCT/CN2019/130943
Other languages
English (en)
French (fr)
Inventor
许胜锋
杨艳梅
应江威
李濛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980103374.7A priority Critical patent/CN114902703B/zh
Priority to EP19958664.5A priority patent/EP4061024B1/en
Priority to PCT/CN2019/130943 priority patent/WO2021134701A1/zh
Publication of WO2021134701A1 publication Critical patent/WO2021134701A1/zh
Priority to US17/839,648 priority patent/US20220312517A1/en

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Classifications

    • 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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security

Definitions

  • the embodiments of the application relate to the field of communication technology, and in particular to a device-to-device (D2D) communication method, device, and system.
  • D2D device-to-device
  • D2D communication may allow user equipment (user equipment, UE) to communicate through a Proximity Communication 5 (PC5) interface, and transmit different types of D2D service applications by sharing physical transmission resources.
  • PC5 Proximity Communication 5
  • D2D service applications have different quality of service (QoS) requirements.
  • QoS quality of service
  • D2D communication devices share physical transmission resources to transmit different D2D service applications, the physical transmission resources in the physical transmission resource pool are different. Limited, the quality of service that can be achieved for D2D business applications is limited, and it is difficult to meet the QoS requirements of different D2D business applications.
  • the present application provides a D2D communication method, device, and system to solve the problem that the existing D2D communication cannot meet the service quality requirements of different business applications.
  • a D2D communication method includes: a first terminal establishes a side link corresponding to a side link slice between the first terminal and a second terminal, and on the side link, passing the side link The physical transmission resource corresponding to the uplink slice communicates with the second terminal.
  • the first terminal establishes a side link corresponding to the side link slice between the first terminal and the second terminal, and passes the side link on the side link.
  • the physical transmission resources corresponding to the slices communicate with the second terminal, which can realize D2D communication between terminals in the manner of side-link slicing; and because the physical transmission resource pools corresponding to different side-link slices may be different, the use of different
  • the physical transmission resources in the physical transmission resource pool transmit data of different D2D business applications, which can meet the service quality requirements of different D2D business applications; at the same time, use the physical transmission resources in different physical transmission resource pools to perform D2D services.
  • Application transmission can also improve resource utilization in the network.
  • the first terminal establishing the side link between the first terminal and the second terminal includes: the first terminal sends the identification information including the side link slice to the second terminal for The first request to establish a side link.
  • the first terminal sends the first request including the identification information of the side link slice to the second terminal, so that the second terminal can identify the side link slice according to the identification information of the side link slice. , Thereby establishing a side link corresponding to the side link slice between the first terminal and the second terminal.
  • the first terminal sending the first request to the second terminal includes: the first terminal sends to the second terminal according to the correspondence between the identification information of the D2D service application and the identification information of the side link slice The first request; where the side link is used to transmit data of D2D service applications.
  • the first terminal determines the corresponding side link slice according to the D2D service application, and sends the identification information of the side link slice to the second terminal to establish a connection between the first terminal and the second terminal.
  • the side link for transmitting the D2D service application data.
  • the first terminal sends to the mobility management network element a second request including the capability information of the first terminal for instructing the first terminal to support D2D communication, and receives from the mobility management network element including D2D A response to the second request of the correspondence between the identification information of the service application and the identification information of the side link slice.
  • the first terminal sends the capability information supporting D2D communication to the mobility management network element, and the mobility management network element slices the identification information and the side link of the D2D service application corresponding to the first terminal according to the capability information
  • the corresponding relationship of the identification information is sent to the first terminal, so that the first terminal can determine the side link slice corresponding to the D2D service application according to the corresponding relationship, so that the D2D service can be transmitted between the first terminal and the second terminal.
  • Apply the side link of the data and use the physical transmission resources for the side link slice to communicate with the second terminal on the side link.
  • the second request may be a registration request.
  • the first terminal may carry the capability information of the first terminal in the registration request during the registration process, so as to reduce the signaling interaction between the first terminal and the mobility management network element.
  • the first terminal sending the first request to the second terminal includes: if the first terminal determines that the second terminal supports sidelink slicing, the first terminal sends the first request to the second terminal.
  • the first terminal determines that the second terminal supports the side link slice corresponding to the D2D service application, it sends the first request to establish the side link to the second terminal, which can avoid sending other side links that do not support the side link.
  • the terminal of the uplink slicing sends the first request, which reduces the signaling interaction with other terminals in the network.
  • the first terminal sends a broadcast message including identification information of the side link slice; and receives a response from the second terminal to the broadcast message indicating that the second terminal supports the side link slice.
  • the first terminal can broadcast the identification information of the side link slice in the network in the form of broadcast.
  • the second terminal in the network that supports the side link slice receives the broadcast message, it sends the message to the first terminal.
  • a terminal sends a response to a broadcast message, so that the first terminal can discover the second terminal in the network that supports the side-link slice, so as to facilitate the establishment of the corresponding side-link slice between the first terminal and the second terminal.
  • the first terminal sending the first request to the second terminal includes: if the first terminal determines that the access network device is allowed to use the side link slicing, the first terminal sends the first request to the second terminal .
  • the first terminal determines that the access network device is allowed to use the side-link slicing, it sends a first request to establish the side-link to the second terminal, which is between the first terminal and the second terminal.
  • the successful establishment of the side link corresponding to the side link slice provides guarantee.
  • the first terminal sends a third request including the identification information of the side link slice to the access network device; the first terminal receives from the access network device the indication that the side link slice is allowed to be used The response to the third request.
  • the first terminal sends a third request including the identification information of the side link slice to the access network device, and the access network device determines whether to allow the first terminal to use the side link according to the received request. Slicing, if allowed to use, send a response to the third request for allowing the use of side link slices to the first terminal to provide for the successful establishment of the side link corresponding to the side link slice between the first terminal and the second terminal Guaranteed.
  • the first terminal determines the physical transmission resource.
  • the first terminal determines the corresponding physical transmission resources according to the side link slices. Since different side link slices correspond to different physical transmission resource pools, the physical transmission resources in different physical transmission resource pools are used. Transmission of different D2D business applications can meet the service quality requirements of different D2D business applications; at the same time, the use of physical transmission resources in different physical transmission resource pools to transmit D2D business applications can also improve resource utilization in the network rate.
  • the first terminal determining the physical transmission resource includes: the first terminal sends a fourth request including identification information of the side link slice to the access network device, and receives the physical transmission resource from the access network device. A response to the fourth request for transmission resources, where the fourth request is used to request the acquisition of physical transmission resources of the side link slice.
  • the first terminal may directly send a fourth request to the access network device to obtain the physical transmission resource corresponding to the side link slice allocated by the access network device for the first terminal, and determine for the first terminal
  • the physical transmission resources corresponding to the side link slices provide a feasible solution.
  • the first terminal determining the physical transmission resource corresponding to the side link slice includes: the first terminal receives from the access network device the correspondence between the identification information of the side link slice and the physical transmission resource The system information block (SIB) of the relationship.
  • SIB system information block
  • the first terminal can determine the side chain corresponding to the D2D service application according to the corresponding relationship between the identification information of the side link slice included in the system information block SIB broadcast by the access network device and the physical transmission resource.
  • the physical transmission resources corresponding to the path slices provide a feasible solution for the first terminal to determine the physical transmission resources corresponding to the side link slices.
  • the first terminal determines the physical transmission resource, including: the first terminal receives from the access network device the system information block SIB including the correspondence between the identification information of the side link slice and the physical transmission resource pool , The first terminal determines the physical transmission resource according to the physical transmission resource pool.
  • the first terminal can determine the side row corresponding to the D2D service application according to the correspondence between the identification information of the side link slice included in the system information block SIB broadcast by the access network device and the physical transmission resource pool.
  • the physical transmission resource pool corresponding to the link slice so as to determine the physical transmission resource required to transmit the data of the D2D service application from the physical transmission resource pool, which provides the feasibility for the first terminal to determine the physical transmission resource corresponding to the side link slice Program.
  • determining the physical transmission resource by the first terminal includes: the first terminal sends a fifth request including identification information of the side link slice to the mobility management network element, and receives the information from the mobility management network element.
  • the response to the fifth request including the correspondence between the identification information of the side link slice and the physical transmission resource pool; the first terminal determines the physical transmission resource according to the physical transmission resource pool, where the fifth request is used to request to obtain the side link Physical transmission resources corresponding to the path slice.
  • the first terminal can receive the correspondence between the identification information of the side link slice and the physical transmission resource pool sent by the mobility management network element by sending the fifth request to the mobility management network element, thereby determining The physical transmission resource pool corresponding to the side link slice corresponding to the D2D service application, so as to determine the physical transmission resource required to transmit the data of the D2D service application from the physical transmission resource pool, and determine the corresponding side link slice for the first terminal Physical transmission resources provide a feasible solution.
  • the first terminal sends a fifth request including the identification information of the side link slice to the mobility management network element, and receives the identification information including the side link slice and the identification information from the mobility management network element.
  • the response to the fifth request for the correspondence of the physical transmission resources.
  • the first terminal can receive the correspondence between the identification information of the side link slice and the physical transmission resource sent by the mobility management network element by sending the fifth request to the mobility management network element, which is the first The terminal determines the physical transmission resource corresponding to the side link slice to provide a feasible solution.
  • a communication device in a second aspect, can implement the functions performed by the first terminal in the first aspect or the possible design of the first aspect, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes: a processing module and a transceiver module.
  • the processing module is used to establish the side link between the first terminal and the second terminal, and the side link corresponds to the side link slice; the processing module, the transceiver module, is used to pass the side link on the side link.
  • the physical transmission resource corresponding to the uplink slice communicates with the second terminal.
  • the specific implementation of the communication device may refer to the first aspect or the behavior function of the first terminal in the D2D communication method provided by any possible design of the first aspect.
  • the first The terminal establishes a side link corresponding to the side link slice between the first terminal and the second terminal, and communicates with the second terminal on the side link through the physical transmission resources corresponding to the side link slice.
  • Communication can realize D2D communication between terminals in the way of side-link slicing; and because different side-link slicing corresponds to different physical transmission resource pools, the physical transmission resource pairs in different physical transmission resource pools are used for different
  • the transmission of D2D business applications can meet the quality of service requirements of different D2D business applications; at the same time, the use of physical transmission resources in different physical transmission resource pools to transmit D2D business applications can also improve the resource utilization rate in the network.
  • the transceiver module is configured to send a first request for establishing a side link including identification information of a side link slice to the second terminal.
  • the transceiver module of the communication device sends the first request including the identification information of the side link slice to the second terminal, so that the second terminal can identify the side link according to the identification information of the side link slice.
  • Link slicing so that a side link corresponding to the side link slice is established between the first terminal and the second terminal.
  • the transceiver module is also used to send the first request to the second terminal according to the correspondence between the identification information of the D2D service application and the identification information of the side link slice; wherein, the side link uses It is used to transmit data of D2D business applications.
  • the first terminal determines the corresponding side link slice according to the D2D service application, and sends the identification information of the side link slice to the second terminal to establish transmission between the first terminal and the second terminal The side link of the D2D service application data.
  • the communication device further includes a transceiving module; the foregoing transceiving module is also used to send a second request including the first terminal's capability information for instructing the first terminal to support D2D communication to the mobility management network element
  • the transceiver module is used to receive a response to the second request from the mobility management network element that includes the correspondence between the identification information of the D2D service application and the identification information of the side link slice.
  • the transceiver module of the communication device sends the capability information supporting D2D communication to the mobility management network element, and the mobility management network element converts the identification information and the side line of the D2D service application corresponding to the first terminal according to the capability information.
  • the corresponding relationship of the identification information of the link slice is sent to the first terminal, so that the first terminal can determine the side link slice corresponding to the D2D service application according to the corresponding relationship, so as to facilitate the establishment of a connection between the first terminal and the second terminal.
  • a side link for transmitting D2D service application data, and on the side link, the physical transmission resource for the side link slice is used to communicate with the second terminal.
  • the transceiver module is further configured to send the first request to the second terminal if the first terminal determines that the second terminal supports sidelink slicing.
  • the processing module of the communication device determines that the second terminal supports the side link slice corresponding to the D2D service application, it sends the first request to establish the side link to the second terminal, which can avoid sending other devices to other devices.
  • the terminal that supports the side link slicing sends the first request, which reduces signaling interaction with other terminals in the network.
  • the transceiver module is also used to send a broadcast message including the identification information of the sideline link slice; the transceiver module is also used to receive a message from the second terminal that is used to indicate that the second terminal supports the sideline link. The response to the broadcast message of the road slice.
  • the transceiver module of the communication device can broadcast the identification information of the side link slice in the network in the form of broadcast.
  • the second terminal supporting the side link slice in the network receives the broadcast message , Send the response of the broadcast message to the first terminal, so that the first terminal can find the second terminal in the network that supports the side-link slicing, so as to facilitate the establishment of the side-link slicing between the first terminal and the second terminal.
  • the side link corresponding to the slice can be used to broadcast message.
  • the transceiver module is further configured to send the first request to the second terminal if the first terminal determines that the access network device is allowed to use the side link slicing.
  • the processing module of the communication device sends a first request for establishing a side link to the second terminal when it is determined that the access network device is allowed to use the side link slicing.
  • the successful establishment of the sidewalk link corresponding to the sidewalk link slice between the terminals provides a guarantee.
  • the transceiver module is also used to send a third request including identification information of the side link slice to the access network device; the transceiver module is also used to receive instructions from the access network device The response to the third request that allows the use of sidelink slicing.
  • the transceiver module of the communication device sends a third request including the identification information of the side link slice to the access network device, and the access network device determines whether the first terminal is allowed to use the side according to the received request.
  • Uplink slicing if allowed to use, send a response to the first terminal to allow the use of the third request of the connected slicing, which provides for the successful establishment of the sidelink corresponding to the side-link slicing between the first terminal and the second terminal Guaranteed.
  • the processing module is also used to determine physical transmission resources.
  • the processing module of the communication device determines the corresponding physical transmission resources according to the side link slices. Since different side link slices correspond to different physical transmission resource pools, the physical transmission resource pools in different physical transmission resource pools are used. Physical transmission resources transmit different D2D business applications, which can meet the service quality requirements of different D2D business applications; at the same time, use physical transmission resources in different physical transmission resource pools to transmit D2D business applications, which can also improve the network Resource utilization.
  • the transceiver module is also used to send a fourth request including identification information of the side link slice to the access network device; the transceiver module is also used to receive the first terminal from the access network device The response to the fourth request including the physical transmission resource.
  • the transceiver module of the communication device can directly send a fourth request to the access network device to obtain the physical transmission resource corresponding to the side link slice allocated by the access network device for the first terminal, which is the first A terminal determines the physical transmission resource corresponding to the side link slice to provide a feasible solution.
  • the transceiver module is also used to receive the SIB including the correspondence between the identification information of the side link slice and the physical transmission resource from the access network device.
  • the processing module of the communication device can determine the corresponding relationship between the D2D service application and the identification information of the side link slice included in the system information block SIB broadcasted by the access network device and the physical transmission resource.
  • the physical transmission resource corresponding to the side link slice provides a feasible solution for the first terminal to determine the physical transmission resource corresponding to the side link slice.
  • the transceiver module is also used to receive the system information block SIB including the correspondence between the identification information of the side link slice and the physical transmission resource pool from the access network device; the processing module is also used to According to the physical transmission resource pool, the physical transmission resource is determined.
  • the processing module of the communication device can determine the correspondence between the D2D service application and the physical transmission resource pool according to the identification information of the side link slice included in the system information block SIB broadcast by the access network equipment The physical transmission resource pool corresponding to the side link slice, so as to determine the physical transmission resource required to transmit the data of the D2D service application from the physical transmission resource pool, and provide the first terminal to determine the physical transmission resource corresponding to the side link slice A feasible plan.
  • the transceiver module is also used to send a fifth request including identification information of the side link slice to the mobility management network element; the transceiver module is also used to receive information from the mobility management network element including The response to the fifth request of the correspondence between the identification information of the side link slice and the physical transmission resource pool; the processing module is further configured to determine the physical transmission resource according to the physical transmission resource pool.
  • the transceiver module of the communication device can receive the correspondence between the identification information of the side link slice and the physical transmission resource pool sent by the mobility management network element by sending the fifth request to the mobility management network element , So as to determine the physical transmission resource pool corresponding to the side link slice corresponding to the D2D service application, so as to determine the physical transmission resource required to transmit the data of the D2D service application from the physical transmission resource pool, and determine the side link for the first terminal
  • the physical transmission resources corresponding to the slices provide a feasible solution.
  • the transceiver module is also used to send the fifth request including the identification information of the side link slice; the transceiver module is also used to receive the information including the side link slice from the mobility management network element. A response to the fifth request for the correspondence between the identification information and the physical transmission resource.
  • the transceiver module of the communication device can receive the correspondence between the identification information of the side link slice and the physical transmission resource sent by the mobility management network element by sending the fifth request to the mobility management network element, It provides a feasible solution for the first terminal to determine the physical transmission resource corresponding to the side link slice.
  • a communication device in a third aspect, is provided, and the communication device may be a first terminal or a chip or a system on a chip in the first terminal.
  • the communication device can implement the functions performed by the first terminal in the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the communication device may include a processor and a transceiver. The processor and the transceiver may be used to support the communication device to implement the aforementioned first aspect or the functions involved in any possible design of the first aspect.
  • the processor can be used to establish a side link between the first terminal and the second terminal, and the side link corresponds to the side link slice; the transceiver can be used on the side link to pass the side link
  • the physical transmission resource corresponding to the link slice communicates with the second terminal.
  • the communication device may further include a memory, and the memory is used to store necessary computer-executable instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the D2D communication method as described in the first aspect or any one of the possible designs of the first aspect.
  • the specific implementation of the communication device may refer to the first aspect or the behavior function of the first terminal in the D2D communication method provided by any possible design of the first aspect.
  • a communication device in a fourth aspect, includes one or more processors and one or more memories; the one or more memories are coupled with the one or more processors, and the one or more memories are used for storing Computer program code or computer instructions; when one or more processors execute the computer instructions, the communication device executes the D2D communication method as described in the first aspect or any possible design of the first aspect.
  • a computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are run on a computer, the computer executes the steps described in the first aspect or the first aspect. Any possible design of the described D2D communication method.
  • a computer program product containing instructions which when running on a computer, causes the computer to execute the D2D communication method as described in the first aspect or any possible design of the first aspect.
  • a D2D communication method includes: a second terminal receives a first request from a first terminal that includes identification information of a sidelink slice; the first request is used to establish a first terminal and a second terminal.
  • the second terminal can identify the side link slice according to the received first request including the identification information of the side link slice, and when the second terminal supports the establishment of the side link When slicing the side link corresponding to the slice, a response to the first request is sent to the first terminal, and the side link corresponding to the side link slice is established between the first terminal and the second terminal.
  • the second terminal sends a response to the first request to the first terminal, including: if the second terminal has the right to use the sidelink slice, then the second terminal sends the first request to the first terminal.
  • the terminal sends a response to the first request.
  • the second terminal determines whether the side link slice carried in the first request is in the side link slice subscribed by the second terminal or the allowed side link. In the link slicing, if it is considered that the second terminal supports the side-link slicing, the side-link corresponding to the side-link slicing can be established. When the second terminal supports the side-link slicing, the A terminal sends a response to the first request, notifying the first terminal that the side uplink is successfully established.
  • the second terminal having the right to use the side link slice includes the following situations: the side link slice belongs to the side link slice subscribed by the second terminal; the side link slice belongs to the second terminal Allowed side link slices, where the side link slices allowed by the second terminal are determined by the mobility management network element in combination with the side link slices subscribed by the second terminal and the capability information of the access network device.
  • the method further includes: the second terminal receives from the mobility management network element the identification information of one or more side link slices for which the second terminal has usage rights.
  • the second terminal judges for the second terminal whether to support the first terminal sent by the first terminal by receiving the contracted side link slice and/or allowed side link slice from the mobility management network element.
  • the side link slicing in the request provides a feasible solution.
  • a communication device can implement the functions performed by the second terminal in the seventh aspect or the possible design of the seventh aspect, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes: a transceiver module.
  • the transceiver module is configured to receive a first request including identification information of the side link slice from the first terminal; the first request is used to establish a side link between the first terminal and the second terminal; the side link Corresponding to the side link slice;
  • the transceiver module is configured to send a response to the first request indicating that the side link is successfully established to the first terminal.
  • the specific implementation of the communication device may refer to the behavior and function of the second terminal in the D2D communication method provided by the seventh aspect or any one of the possible designs of the seventh aspect.
  • the second The terminal may identify the side link slice according to the received first request including the identification information of the side link slice, and when the second terminal supports the establishment of the side link corresponding to the side link slice, the first request A terminal sends a response to the first request, and establishes a side link corresponding to the side link slice between the first terminal and the second terminal.
  • the communication device further includes a processing module, and the above transceiver module is specifically configured to send the first terminal to the first terminal if the processing module determines that the second terminal has the right to use the side link slice. Send the response to the first request.
  • the second terminal determines whether the side link slice carried in the first request is in the side link slice subscribed by the second terminal or the allowed side link. In the link slicing, if it is considered that the second terminal supports the side-link slicing, the side-link corresponding to the side-link slicing can be established. When the second terminal supports the side-link slicing, the A terminal sends a response to the first request, notifying the first terminal that the side uplink is successfully established.
  • the second terminal having the right to use the side link slice includes the following situations: the side link slice belongs to the side link slice subscribed by the second terminal; the side link slice belongs to the second terminal Allowed side link slices, where the side link slices allowed by the second terminal are determined by the mobility management network element in combination with the side link slices subscribed by the second terminal and the capability information of the access network device.
  • the above-mentioned transceiver module is further configured to receive identification information of one or more side link slices for which the second terminal of the mobility management network element has the usage right.
  • the second terminal judges for the second terminal whether to support the first terminal sent by the first terminal by receiving the contracted side link slice and/or allowed side link slice from the mobility management network element.
  • the side link slicing in the request provides a feasible solution.
  • a communication device may be a second terminal or a chip or a system on a chip in the second terminal.
  • the communication device can implement the functions performed by the second terminal in the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the communication device may include a transceiver.
  • the transceiver may be used to support the communication device to implement the functions involved in the seventh aspect or any one of the possible designs of the seventh aspect.
  • the transceiver may be used to receive a first request including identification information of a side link slice from a first terminal. The first request is used to establish a side link between the first terminal and the second terminal.
  • the link corresponds to a slice of the side link; the transceiver may also be used to send a response to the first request indicating that the side link is successfully established to the first terminal through the communication interface.
  • the communication device may further include a memory, and the memory is used to store necessary computer-executable instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the D2D communication method as described in the seventh aspect or any one of the possible designs of the seventh aspect.
  • the specific implementation of the communication device may refer to the behavior function of the second terminal in the D2D communication method provided in the seventh aspect or any one of the possible designs of the seventh aspect.
  • a communication device in a tenth aspect, includes one or more processors and one or more memories; the one or more memories are coupled with the one or more processors, and the one or more memories are used for storing Computer program code or computer instructions; when one or more processors execute the computer instructions, the communication device executes the D2D communication method as described in the seventh aspect or any possible design of the seventh aspect.
  • a computer-readable storage medium stores computer instructions or programs.
  • the computer instructions or programs When the computer instructions or programs are run on a computer, the computer can execute the seventh aspect or the seventh aspect. Any possible design of the D2D communication method.
  • a twelfth aspect provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the D2D communication method as described in the seventh aspect or any possible design of the seventh aspect.
  • a D2D communication method includes: an access network device broadcasts to a terminal a system information block SIB including a correspondence between identification information of multiple side link slices and a physical transmission resource pool.
  • the access network device can directly broadcast the corresponding relationship between the identification information of the side link slice and the physical transmission resource pool, so that each terminal is based on the system information block SIB broadcast by the access network device
  • the physical transmission resource pools of the respective side link slices are determined, so as to determine the physical transmission resource corresponding to the transmission of the D2D service application from the physical transmission resource pool.
  • the method further includes: the access network device receives a fourth request from the terminal that includes the identification information of the side link slice; wherein, the identification information of the one or more side link slices mentioned above The identification information of the side link slice is included; the access network device sends a response including the fourth request of the physical transmission resource corresponding to the side link slice to the terminal.
  • the access network device can broadcast the corresponding relationship between the identification information of the side link slice and the physical transmission resource pool to inform each terminal, and the terminal determines the physical transmission resource from the determined physical transmission resource pool.
  • the access network device may also receive the fourth request sent by the terminal, and according to the side link slice in the fourth request, send the physical transmission resource corresponding to the side link slice allocated for the terminal to the terminal.
  • the method further includes: the access network device receives a third request from the terminal including the identification information of the side link slice; and the access network device sends the terminal to indicate permission to use the side link. Response to the third request of the uplink slice.
  • the access network device determines whether the first terminal is allowed to use the sidelink slice, and if it is allowed, sends the first terminal that allows the use of the connected slice to be used.
  • the response to the three requests provides guarantee for the successful establishment of the side link corresponding to the side link slice between the first terminal and the second terminal.
  • the access network device sends a response to the third request to the terminal, including: if the access network device determines that the number of established side links corresponding to the side link slice is less than the preset number threshold , The access network device sends a response to the third request to the terminal, where the preset number threshold is the maximum value of the number of side links corresponding to the side link slices.
  • the access network equipment judges whether the number of side links currently supported is less than the preset number threshold. If it is less, it means that the access network equipment can also support the establishment of side links; if it is not less, it means The number of side links currently supported by the access network device has reached the upper limit. In order to ensure that the use of the already established side links is not affected, the establishment of new side links cannot be supported. The access network equipment can ensure the normal use of the established side links by controlling the number of supported side links.
  • the access network device sends a response to the third request to the terminal, including: if the access network device verifies that the terminal has the right to use the side link slice, then the access network device The network access device sends a response to the third request to the terminal.
  • the access network device when the side link slice is in the contracted side link slice, and the access network supports the side link slice, the access network device sends a response to the third request to the terminal, which is the side link slice.
  • a guarantee is provided for the successful establishment of the side link corresponding to the uplink slice.
  • the access network device receives the identification information of one or more side link slices for which the terminal of the mobility management network element has usage rights.
  • the terminal has the right to use side link slices, including the following situations: the side link slice belongs to the side link slice that the terminal subscribes; the side link slice belongs to the side link allowed by the terminal Slice, where the side link slice allowed by the terminal is determined by the mobility management network element in combination with the side link slice subscribed by the terminal and the capability information of the access network device.
  • the access network device sending a response to the third request to the terminal includes: if the access network device supports sidelink slicing, the access network device sends a response to the third request to the terminal .
  • the access network device when the side link slice is in the allowed side link slice, the access network device sends a response to the third request to the terminal, which is the success of the side link corresponding to the side link slice. Establish to provide protection.
  • a communication device in a fourteenth aspect, can implement the functions performed by the access network equipment in the above-mentioned thirteenth aspect or the possible design of the thirteenth aspect, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes: a transceiver module.
  • the transceiver module is configured to broadcast to the terminal a system information block SIB including the correspondence between the identification information of multiple side link slices and the physical transmission resource pool.
  • the specific implementation of the communication device may refer to the behavioral function of the access network device in the D2D communication method provided by the thirteenth aspect or any one of the possible designs of the thirteenth aspect, based on the communication described in the fourteenth aspect.
  • the access network device can directly broadcast the corresponding relationship between the identification information of the side link slice and the physical transmission resource pool, so that each terminal determines the corresponding side link according to the system information block SIB broadcast by the access network device
  • the physical transmission resource pool is sliced, so as to determine the physical transmission resource corresponding to the transmission of the D2D service application from the physical transmission resource pool.
  • the communication device further includes a transceiver module, which is used to receive a fourth request from the terminal including identification information of the side link slice; wherein, the above one or more side link slices
  • the identification information includes the identification information of the side link slice; the transceiver module is further configured to send a response including the fourth request of the physical transmission resource corresponding to the side link slice to the terminal.
  • the access network device can broadcast the corresponding relationship between the identification information of the side link slice and the physical transmission resource pool to inform each terminal, and the terminal determines the physical transmission resource from the determined physical transmission resource pool.
  • the access network device may also receive the fourth request sent by the terminal, and according to the side link slice in the fourth request, send the physical transmission resource corresponding to the side link slice allocated for the terminal to the terminal.
  • the transceiver module is also used to receive a third request from the terminal including the identification information of the side link slice; the transceiver module is also used to send to the terminal an indication to allow the use of the side link The response to the third request of the slice.
  • the access network device determines whether the first terminal is allowed to use the sidelink slice, and if it is allowed, sends the first terminal that allows the use of the connected slice to be used.
  • the response to the three requests provides guarantee for the successful establishment of the side link corresponding to the side link slice between the first terminal and the second terminal.
  • the transceiver module is specifically configured to send a response to the third request to the terminal if the access network device determines that the number of established side links corresponding to the side link slice is less than the preset number threshold , Where the preset number threshold is the maximum value of the number of side links corresponding to the side link slice.
  • the access network equipment judges whether the number of side links currently supported is less than the preset number threshold. If it is less, it means that the access network equipment can also support the establishment of side links; if it is not less, it means The number of side links currently supported by the access network device has reached the upper limit. In order to ensure that the use of the already established side links is not affected, the establishment of new side links cannot be supported. The access network equipment can ensure the normal use of the established side links by controlling the number of supported side links.
  • the transceiver module is specifically configured to send the access network device to the terminal if the access network device verifies that the terminal has the right to use the side link slice. The response to the third request.
  • the access network device when the side link slice is in the contracted side link slice, and the access network supports the side link slice, the access network device sends a response to the third request to the terminal, which is the side link slice.
  • a guarantee is provided for the successful establishment of the side link corresponding to the uplink slice.
  • the access network device receives the identification information of one or more side link slices for which the terminal of the mobility management network element has usage rights.
  • the terminal has the right to use side link slices, including the following situations: the side link slice belongs to the side link slice that the terminal subscribes; the side link slice belongs to the side link allowed by the terminal Slice, where the side link slice allowed by the terminal is determined by the mobility management network element in combination with the side link slice subscribed by the terminal and the capability information of the access network device.
  • the transceiver module is specifically configured to send a response to the third request to the terminal if the access network device supports sidelink slicing.
  • the access network device when the side link slice is in the allowed side link slice, the access network device sends a response to the third request to the terminal, which is the success of the side link corresponding to the side link slice. Establish to provide protection.
  • a communication device may be an access network device or a chip or a system on a chip in the access network device.
  • the communication device can realize the functions performed by the access network equipment in the above-mentioned aspects or various possible designs, and the functions can be realized by hardware.
  • the communication device may include a transceiver.
  • the transceiver may be used to support the communication device to implement the above-mentioned thirteenth aspect or the functions involved in any possible design of the thirteenth aspect.
  • the transceiver may broadcast to the terminal the system information block SIB including the correspondence between the identification information of multiple side link slices and the physical transmission resource pool.
  • the communication device may further include a memory, and the memory is used to store necessary computer-executable instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the D2D communication method as described in the above-mentioned thirteenth aspect or any one of the possible designs of the thirteenth aspect .
  • the specific implementation of the communication device may refer to the behavior function of the access network device in the D2D communication method provided by the thirteenth aspect or any one of the possible designs of the thirteenth aspect.
  • a communication device in a sixteenth aspect, includes one or more processors and one or more memories; the one or more memories are coupled with the one or more processors, and the one or more memories are used for Computer program codes or computer instructions are stored; when one or more processors execute the computer instructions, the communication device is caused to execute the D2D communication method as described in the thirteenth aspect or any possible design of the thirteenth aspect.
  • a computer-readable storage medium stores computer instructions or programs.
  • the computer can execute operations such as the thirteenth aspect or the tenth aspect.
  • the eighteenth aspect provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the D2D communication method as described in the thirteenth aspect or any possible design of the thirteenth aspect.
  • a communication system in a nineteenth aspect, includes the communication device according to the second aspect or any possible design of the second aspect and any possible design according to the eighth aspect or the eighth aspect The communication device.
  • a twentieth aspect provides a communication system, which includes the communication device as described in the second aspect or any possible design of the second aspect, or any possible design of the eighth aspect or the eighth aspect The communication device and the communication device according to the fourteenth aspect or any possible design of the fourteenth aspect.
  • FIG. 1a is a simplified schematic diagram of a communication system provided by an embodiment of this application.
  • FIG. 1b is a simplified schematic diagram of communication between terminals using sidelink slicing according to an embodiment of this application;
  • FIG. 2 is a schematic diagram of the composition of a communication device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a D2D communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram of a method for obtaining the correspondence between the identification information of the D2D service application and the identification information of the side link slice according to an embodiment of the application;
  • FIG. 5 is a schematic diagram of a communication method for discovering a second terminal according to an embodiment of this application.
  • FIG. 6 is a schematic diagram of a communication method for determining that a first terminal is allowed to use sidelink slicing according to an embodiment of the application;
  • FIG. 7 is a schematic diagram of a method for establishing a side link between a first terminal and a second terminal according to an embodiment of this application;
  • FIG. 8 is a schematic diagram of a method for a first terminal to obtain a physical transmission resource corresponding to a side link slice according to an embodiment of the application;
  • FIG. 9 is a schematic diagram of a method for a first terminal to obtain a physical transmission resource corresponding to a side link slice according to an embodiment of the application.
  • FIG. 10 is a schematic diagram of a method for a first terminal to obtain a physical transmission resource corresponding to a side link slice according to an embodiment of this application;
  • FIG. 11 is a schematic diagram of the composition of a communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of the composition of a communication device provided by an embodiment of this application.
  • FIG. 13 is a schematic diagram of the composition of a communication device provided by an embodiment of the application.
  • the D2D communication method provided by the embodiments of the present application can be used in any communication system that supports D2D communication, and can also be used in any communication system that supports vehicle-to-everything (V2X) communication.
  • the communication system can be The 3rd generation partnership project (3GPP) communication system, for example, the long term evolution (LTE) system, and the fifth generation (5G) mobile communication system, the new air interface (new air interface) system, radio, NR) system, NR V2X system and other next-generation communication systems can also be non-3GPP communication systems without limitation.
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • 5G fifth generation
  • Fig. 1a is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include multiple terminals, access network equipment, core network equipment, and a data network (DN).
  • the terminal may be located within the coverage area of the cell of the access network equipment, or may be located outside the coverage area of the cell of the access network equipment.
  • the terminal can perform air interface communication with the access network device through the uplink (UL).
  • the terminal sends data to the access network device on the UL, and the access network device forwards the received data to the core network device.
  • the core network device processes the data, and sends the processed data to the terminal through the access network device.
  • the terminal sends uplink data to the access network equipment through the physical sidelink share channel (PUSCH) on the UL, and the access network equipment forwards the received uplink data to the core network equipment, and the core network equipment
  • the uplink data is processed, and the processed uplink data is sent to the core network device through the access network device; among them, the access network device that forwards the uplink data from the terminal to the core network device and the downlink that forwards the core network device to the terminal
  • the data access network device can be the same access network device or different access network devices, which can be specifically determined by the server.
  • the terminal can also communicate with the core network device through a specific interface.
  • the terminal can communicate with the access and mobility management function (AMF) network element in the core network device through the N1 interface.
  • AMF access and mobility management function
  • the terminal can also perform side-line communication or D2D communication with other terminals through the sidelink (SL), and send data to other terminals on the SL, for example, on the SL through the physical layer shared channel (physical sidelink). share channel, PSSCH) send sideline data to other terminals, and send sideline feedback control corresponding to the received sideline data to other terminals through the sidelink physical layer feedback channel (PSFCH) on the SL Information (sidelink feedback control information, SFCI), etc.
  • D2D communication may include vehicle-to-vehicle communication, vehicle-pedestrian communication, vehicle-infrastructure communication, unmanned aerial vehicle (UAV) and unmanned aerial vehicle communication, etc., without limitation.
  • the SL may also be referred to as a direct link or a PC5 interface link, etc., which is not limited.
  • the terminal (terminal) in FIG. 1a may be referred to as a user equipment (UE), a mobile station (mobile station, MS), or a mobile terminal (mobile terminal, MT), etc.
  • the terminal in FIG. 1a may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, and a smart grid.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals wireless terminals in smart cities, wireless terminals in smart homes, in-vehicle terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, and smart connected vehicles , There are no restrictions on drones with UAV to UAV (U2U) communication capabilities.
  • V2V vehicle-to-vehicle
  • the access network device in Figure 1a can be any device with wireless transceiver functions, which is mainly used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management.
  • the access network device may be an access network (AN)/radio access network (RAN) device, or may be a device composed of multiple 5G-AN/5G-RAN nodes , It can also be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station (generation nodeB, gNB), a transmission receiving point (TRP), a transmission point (TP), Roadside unit (RSU) and any node in some other access node, etc., are not restricted.
  • the core network equipment in Figure 1a may include: Access and Mobility Management Function (AMF) network elements, Session Management function (SMF) network elements, User Plane Function (UPF) ) Network element, network slice selection function (Network Slice Selection Function, NSSF) network element, network exposure function (Network Exposure Function, NEF) network element, network warehouse function (Network Repository Function, NRF) network element, policy control function (Policy) Network functional entities such as Control Function (PCF) network elements, unified data management (UDM) network elements, and authentication server function (AUSF) network elements.
  • AMF Access and Mobility Management Function
  • SMF Session Management function
  • UPF User Plane Function
  • NSSF Network Slice Selection Function
  • NEF Network Exposure Function
  • NRF Network Repository Function
  • Policy Policy
  • PCF Control Function
  • UDM unified data management
  • AUSF authentication server function
  • the network shown in Figure 1a may also include unified data repository (UDR) network elements, network data analytics function (NWDAF) network Yuan etc
  • the data network in Figure 1a may include proximity service function (proximity service function, ProSe Function) network elements.
  • proximity service function proximity service function, ProSe Function
  • the ProSe Function network element can replace the policy control network element to perform the function performed by the policy control network element in each embodiment of the present application.
  • the multiple terminals, access network devices, and core network devices in the embodiments of the present application may all be one or more chips, or may be a system on chip (SOC) or the like.
  • Fig. 1a is only an exemplary drawing, and the number of devices included therein is not limited.
  • the communication system may also include other devices. The name of each device and each link in Figure 1a are not restricted.
  • each device and each link can also be named other names, such as: the terminal and the access network device pass through User equipment (Uu) interface for communication, UL can also be named Uu link, etc.; terminal and other terminals are directly connected through the direct communication interface PC5 interface, and SL can also be named PC5 link or direct connection Links, etc., are not restricted.
  • Uu User equipment
  • SL can also be named PC5 link or direct connection Links, etc., are not restricted.
  • D2D communication can allow various terminals to communicate through the PC5 interface, and share physical transmission resources with cell users to transmit different types of D2D service applications under the control of the cell network.
  • QoS quality of service
  • D2D communication devices share physical transmission resources to transmit different D2D service applications, the physical transmission resources in the physical transmission resource pool are limited.
  • the service quality that can be achieved for D2D business applications is limited, and it is difficult to meet the QoS requirements of different D2D business applications.
  • an embodiment of the present application provides a D2D communication method.
  • different D2D service applications correspond to different side link slices, and multiple side link slices.
  • the path slice corresponds to the physical transmission resources in the multiple physical transmission resource pools, so that the terminal can use the physical transmission resources corresponding to the side link slice to transmit the corresponding side link slice on the side link corresponding to the side link slice.
  • D2D service application data so as to realize D2D communication between terminals in the way of side link slicing, and meet the service quality requirements of different D2D service applications.
  • the implementation process can refer to the description in the following embodiments corresponding to FIG. 3 to FIG. 10.
  • a sidelink slice can be called a sidelink network slice, which is a logical network with specific network characteristics, and is a key technology to meet the network requirements of the D2D communication network proposed by 3GPP.
  • Different side link slices are logically isolated. It can flexibly provide one or more network services according to the requirements of the demander; as shown in Figure 1b, the side link can be used between terminal 1 and terminal 2.
  • the physical transmission resources corresponding to channel slice 1 can be used for communication, and the physical transmission resources corresponding to side link slice 2 can also be used between terminal 1 and terminal 2 for communication, and the side link slice 3 can be used between terminal 1 and terminal 3.
  • Corresponding physical transmission resources are used for communication, and the terminal 2 and the terminal 3 can use the physical transmission resources corresponding to the side link slice 4 to communicate.
  • each terminal, access network device, and core network device may adopt the composition structure shown in FIG. 2 or include the components shown in FIG. 2.
  • 2 is a schematic diagram of the composition of a communication device 200 provided by an embodiment of the application.
  • the communication device 200 may be a terminal or a chip in a terminal or a system on a chip; it may also be an access network device or a chip in an access network device or System on a chip; it can also be a core network device or a chip or system on a chip in a core network device.
  • the communication device 200 includes a processor 201, a transceiver 202 and a communication line 203.
  • the communication device 200 may further include a memory 204.
  • the processor 201, the memory 204, and the transceiver 202 may be connected through a communication line 203.
  • the processor 201 is a central processing unit (CPU), a general-purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, Programmable logic device (PLD) or any combination of them.
  • the processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the transceiver 202 is used to communicate with other devices or other communication networks.
  • the other communication network may be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver 202 may be a module, a circuit, a transceiver, or any device capable of implementing communication.
  • the communication line 203 is used to transmit information between the components included in the communication device 200.
  • the memory 204 is used to store instructions. Among them, the instruction may be a computer program.
  • the memory 204 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, and may also be a random access memory (RAM) or a random access memory (RAM).
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • the memory 204 may exist independently of the processor 201, or may be integrated with the processor 201.
  • the memory 204 may be used to store instructions or program codes or some data.
  • the memory 204 may be located in the communication device 200 or outside the communication device 200 without limitation.
  • the processor 201 is configured to execute instructions stored in the memory 204 to implement the D2D communication method provided in the following embodiments of the present application.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2.
  • the communication device 200 includes multiple processors, for example, in addition to the processor 201 in FIG. 2, it may also include a processor 207.
  • the communication apparatus 200 further includes an output device 205 and an input device 206.
  • the input device 206 is a device such as a keyboard, a mouse, a microphone, or a joystick
  • the output device 205 is a device such as a display screen and a speaker.
  • the communication device 200 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a similar structure in FIG. 2.
  • the composition structure shown in FIG. 2 does not constitute a limitation on the communication device.
  • the communication device may include more or less components than those shown in the figure, or combine certain components. , Or different component arrangements.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the first terminal may be any terminal in FIG. 1a
  • the second terminal may be any terminal in FIG. 1a that can perform SL communication with the first terminal.
  • the first terminal and the second terminal described in the following embodiments It can have the components shown in Figure 2.
  • FIG. 3 is a flowchart of a D2D communication method provided by this application. As shown in FIG. 3, the method may include:
  • Step 301 The first terminal establishes a side link between the first terminal and the second terminal.
  • the side link may correspond to the side link slice.
  • there are multiple side link slices and different side link slices can meet the transmission requirements of one or more different D2D service applications.
  • side-link slice 1 can meet the transmission requirements of D2D service application 1.
  • Side-link slice 2 can also meet the transmission requirements of D2D service application 1
  • Side-link slice 3 can meet the transmission requirements of D2D service application 2
  • Side-link slice 4 can also meet the transmission requirements of D2D service application 2. .
  • the first terminal when it transmits the data of the D2D service application, it can determine the corresponding side link slice according to the D2D service application, establish the side link corresponding to the side link slice, and use the The side link transmits current business data.
  • establishing the side link between the first terminal and the second terminal by the first terminal may include: the first terminal obtains the correspondence between the identification information of the D2D service application and the identification information of the side link slice, according to the D2D The correspondence between the identification information of the service application and the identification information of the side link slice determines the side link slice corresponding to the D2D service application, and establishes the side link corresponding to the side link slice.
  • the identification information of the D2D service application may be used to indicate the D2D service application, and the identification information may be the identification information of the D2D service application, or other information used to indicate the D2D service application, for example, It is a car networking application or a UAV communication application, etc. It can be an application identifier (APP ID), which is not limited.
  • APP ID application identifier
  • the identification information of the side link slice may be used to indicate the side link slice, and the identification information may be the identity information of the side link slice, or other information used to indicate the side link slice, for example, it may be IoV communication slices or UAV communication slices, etc., can specifically be sidelink slice identifiers (sidelink slice identifiers, sidelink slice IDs), which are not limited.
  • the identification information of the side link slice may include the identification of one or more side link slices for which the first terminal has use rights.
  • the identification information of one or more side link slices for which the first terminal has the right to use includes the side link slices subscribed by the first terminal and/or the side link slices allowed by the first terminal; the first terminal has The identification information of one or more side link slices of the usage authority may also be described as the identification information of the side link slice corresponding to the first terminal.
  • the first terminal in order to ensure the successful establishment of the side link between the first terminal and the second terminal, before step 301 is performed, the first terminal also needs to perform the following condition (1) and/or condition (2) judgments, and when it meets In the case of condition (1) and/or condition (2), perform step 301 again:
  • the second terminal is a terminal that supports side-link slicing and the D2D service application corresponding to the side-link slicing.
  • the second terminal supporting the side link slice may be that the side link slice is in the side link slice subscribed by the second terminal or in the side link slice allowed by the second terminal.
  • the first terminal may determine the second terminal that supports the side-link slice and the D2D service application corresponding to the side-link slice from among multiple terminals capable of performing D2D communication with the first terminal, thereby A side link corresponding to the side link slice is established between the first terminal and the second terminal.
  • the specific process of the first terminal determining the second terminal from the multiple terminals can be referred to as shown in FIG. 5 below.
  • the first terminal is allowed to use the side-link slicing or the first terminal itself is allowed to use the side-link slicing.
  • the first terminal may obtain an authorization license from the access network device or the core network device that allows the first terminal to use the side-link slicing, when the access network device or the core network device allows the first terminal to use the side-link slicing
  • the first terminal may establish a side link corresponding to the side link slice between the first terminal and the second terminal.
  • the specific process for the access network device or the core network device to determine whether to allow the first terminal to use the sidelink slicing can be referred to as shown in FIG. 6 below.
  • Step 302 The first terminal communicates with the second terminal on the side link slice through the physical transmission resource corresponding to the side link slice.
  • the physical transmission resources may include one or more of time domain resources, frequency domain resources, or space domain resources, which are not limited.
  • the physical transmission resources may be included in the physical transmission resource pool.
  • multiple side link slices may correspond to multiple physical transmission resource pools in the network; for example, there are side link slice 1, side link slice 2, and side link in a D2D communication network.
  • Road slice 3 and side link slice 4 there are physical transmission resource pool 1 and physical transmission resource pool 2.
  • side link slice 1 and side link slice 2 can correspond to physical transmission resource pool 1.
  • Road slice 3 and side link slice 4 may correspond to physical transmission resource pool 2; alternatively, side link slice 1 corresponds to physical transmission resource pool 1 and physical transmission resource pool 2, and side link slice 2 corresponds to physical transmission resource pool 1.
  • Side link slice 3 corresponds to physical transmission resource pool 2
  • side link slice 4 corresponds to physical transmission resource pool 1 and physical transmission resource pool 2, etc.; in the actual application process, it can be changed according to the transmission requirements of D2D service applications.
  • the side link slice corresponding to the D2D service application corresponds to a physical transmission resource pool that can meet the transmission requirements of the D2D service application.
  • the first terminal obtains the physical transmission resources corresponding to the side link slices in different manners in different connection management states.
  • the different connection management states may include a connected state (radio resource control connected, RRC connected), an idle state (radio resource control idle, RRC idle) and other states.
  • RRC connected radio resource control connected
  • RRC idle radio resource control idle
  • the first terminal is RRC connected.
  • the first terminal may obtain the physical transmission resource corresponding to the side link slice from the access network device.
  • the first terminal may refer to the method shown in FIG. 8 to obtain the physical transmission resource corresponding to the side link slice.
  • the first terminal may receive a broadcast message including a physical transmission resource pool or physical transmission resource sent by the access network device, and obtain the physical transmission resource corresponding to the side link slice according to the broadcast message.
  • the method can refer to the method shown in FIG. 9.
  • the first terminal may receive the physical transmission resource pool or the physical transmission resource sent by the core network device, so as to obtain the physical transmission resource corresponding to the side link slice.
  • the method can refer to the method shown in FIG. 10.
  • the first terminal establishes a side uplink corresponding to the side uplink slice between the first terminal and the second terminal, and passes the side uplink on the side uplink.
  • the physical transmission resources corresponding to the slices communicate with the second terminal, which can realize D2D communication between terminals in the manner of side-link slicing; and because different side-link slices correspond to different physical transmission resource pools, different side-link slices may be used.
  • the physical transmission resources in the physical transmission resource pool transmit the data of different D2D business applications, which can meet the service quality requirements of different D2D business applications; at the same time, use the physical transmission resources in different physical transmission resource pools to apply D2D business applications Transmission can also improve resource utilization in the network.
  • FIG. 4 is a method of obtaining D2D according to an embodiment of this application.
  • the method for the correspondence between the identification information of the service application and the identification information of the side link slice, as shown in FIG. 4, includes:
  • Step 401 The first terminal sends a second request to the mobility management network element.
  • the mobility management network element may be the AMF in the core network equipment.
  • the second request includes the capability information of the first terminal, and the second request is used to request to obtain related information of the sidelink slice corresponding to the first terminal.
  • the capability information of the first terminal may be the capability information of the first terminal to support D2D communication, and may also be the capability information of the first terminal to support V2X communication.
  • the capability information of the first terminal may be included in a policy container (Policy Container) of the first terminal.
  • Policy Container Policy Container
  • the side link slice corresponding to the first terminal may include the side link slice subscribed by the first terminal and/or the side link slice allowed by the first terminal; the related information of the side link slice includes the side link slice And/or the corresponding relationship between the identification information of the side link slice and the identification information of the D2D service application.
  • the second request includes identification information of the side-link slice, and the second request is used to request permission for the first terminal to use the side-link slice.
  • the second request is also used to request to obtain related information of the side link slice, and the related information includes the corresponding relationship between the side link slice and the identification information of the D2D service application, and/or the side link slice.
  • the second request includes both the capability information of the first terminal and the identification information of the side link slice.
  • the second request may also include the identification information of the first terminal and other information, which is not limited.
  • the first terminal may carry the second request in the registration request and send it to the mobility management network element, so as to reduce signaling interaction.
  • Step 402 The mobility management network element receives the second request, and sends the identification information of the first terminal to the policy control network element.
  • the policy control network element may be a PCF in a core network device.
  • the mobility management network element sends the second request of the first terminal to the policy control network element.
  • the mobility management network element may carry the identification information of the first terminal and/or the second request in the policy association request during the process of the first terminal registering with the network. Give the policy control network element.
  • Step 403 The policy control network element receives the identification information of the first terminal, and determines the identification information of the side link slice subscribed by the first terminal and the identification of the side link slice subscribed by the first terminal according to the subscription information of the first terminal Correspondence between the information and the identification information of the D2D service application.
  • the policy control network element may obtain the subscription information of the first terminal from the UDR in the core network device.
  • the UDR stores the subscription information of each terminal
  • the subscription information of each terminal includes the identification information of the side link slice that the terminal subscribes to, and the correspondence between the identification information of the side link slice and the identification information of the D2D service application. .
  • the policy control network element determines the identification information of the side link slice subscribed by the first terminal according to the subscription information of the first terminal, and the correspondence between the identification information of the side link slice subscribed by the first terminal and the identification information of the D2D service application relationship.
  • the policy control network element when the policy control network element also receives the second request of the first terminal sent by the mobility management network element, if the second request includes the capability information of the first terminal, the policy control network element is based on the capability information of the first terminal It is determined that the first terminal supports D2D communication or V2X communication, and the identification information of the side link slice that the first terminal subscribes to, and the identification information of the side link slice and the identification information of the D2D service application are determined according to the subscription information of the first terminal. Correspondence.
  • the policy control network element may determine whether the side link slice is in the side link slice subscribed by the first terminal, and if so, determine to allow the first terminal to use the side link slice. The side link slice, otherwise, it is determined that the first terminal is not allowed to use the side link slice.
  • the policy control network element may determine the related information of the side-link slicing, where the related information of the side-link slicing includes the side-link slicing Correspondence between the identification information of the road slice and the identification information of the D2D service application, the physical transmission resource pool corresponding to the side link slice, or the physical transmission resource corresponding to the side link slice.
  • the policy control network element may determine whether to allow the first terminal to use the authorization result of the side link slice, and determine the correlation of the side link slice information.
  • the policy control network element may determine the following information according to the second request: information about the side link slice subscribed by the first terminal, whether The first terminal is allowed to use the authorization result of the side link slice carried in the second request or the related information of the side link slice carried in the second request.
  • Step 404 The policy control network element sends the corresponding relationship between the identification information of the side link slice subscribed by the first terminal and the identification information of the D2D service application to the mobility management network element.
  • the policy control network element may also send the identification information of the side link slice subscribed by the first terminal to the mobility management network element. That is, in step 404, the policy control network element may send the first terminal to the mobility management network element.
  • the corresponding relationship between the identification information of the side link slice subscribed by a terminal and the identification information of the D2D service application, or the identification information of the side link slice subscribed by the first terminal and the first terminal are sent to the mobility management network element Correspondence between the identification information of the contracted side link slice and the identification information of the D2D service application.
  • the policy control network element when the policy control network element also receives the second request of the first terminal sent by the mobility management network element, if the second request includes the capability information of the first terminal, the policy control network element signs the side of the first terminal contract The corresponding relationship between the identification information of the uplink slice and the identification information of the D2D service application is sent to the mobility management network element. Alternatively, the policy control network element sends the identification information of the side link slice subscribed by the first terminal to the mobility management network element.
  • the policy control network element sends the authorization result of whether to allow the first terminal to use the side link slice to the mobility management network element; optionally, The policy control network element sends the relevant information of the side link slice to the mobility management network element; optionally, the policy control network element will allow the first terminal to use the authorization result of the side link slice, and the side link slice
  • the related information of the uplink slicing is sent to the mobility management network element.
  • the policy control network element may send one or more of the following information to the mobility management network element: the side subscribed by the first terminal The related information of the uplink slice, whether the first terminal is allowed to use the authorization result of the side link slice carried in the second request, and the related information of the side link slice carried in the second request.
  • the policy control network element may carry the information that needs to be sent to the mobility management network element in the policy information of the first terminal and send it to the mobility management network element to reduce signaling interaction.
  • the policy information of the first terminal is a policy formulated by the policy control network element for the first terminal during the process of the first terminal registering with the network, and the related description of the policy information is consistent with the prior art, and will not be repeated.
  • Step 405 The mobility management network element receives the correspondence between the identification information of the side link slice subscribed by the first terminal and the identification information of the D2D service application, and sends the identification information of the subscribed side link slice and D2D to the first terminal. Correspondence of the identification information of the business application.
  • the mobility management network element may also send the identification information of the side link slice subscribed by the first terminal to the first terminal.
  • the mobility management network element when the mobility management network element receives the second request of the first terminal, if the second request includes the capability information of the first terminal, the mobility management network element slices the side link subscribed by the first terminal.
  • the identification information and the corresponding relationship between the identification information of the side link slice subscribed by the first terminal and the identification information of the D2D service application are sent to the first terminal.
  • the mobility management network element may obtain the subscription information of the first terminal from the UDR, and determine the identification information of the side link slice subscribed by the first terminal according to the subscription information of the first terminal, or the mobility management network element may also Receive the identification information of the side link slice subscribed by the first terminal sent by the policy control network element.
  • the mobility management network element sends the authorization result of whether the first terminal is allowed to use the side link slice received from the policy control network element to the first terminal.
  • a terminal optionally, the mobility management network element sends the side link slice related information carried in the second request received from the policy control network element to the first terminal; the optional mobility management network element will The authorization result of whether to allow the first terminal to use the side link slice received from the policy control network element and the related information of the side link slice carried in the second request are sent to the first terminal.
  • the mobility management network element sends one or more of the following information received from the policy control network element to the first terminal: The related information of the side link slice subscribed by the first terminal, whether the first terminal is allowed to use the authorization result of the side link slice carried in the second request, and the related information of the side link slice carried in the second request.
  • the mobility management network element saves the identification information of the side link slice subscribed by the first terminal as the first terminal context.
  • the foregoing method may further include the following step 406, step 407, and step 408, so that the first terminal obtains the relevant information of the side link slice allowed by the first terminal.
  • Step 406 The mobility management network element obtains the capability information of the access network device.
  • the capability information of the access network device includes identification information of the side link slice that the access network device can support.
  • the access network device may obtain the capability information of the access network device through a next generation application protocol (NGAP) message.
  • NGAP next generation application protocol
  • Step 407 The mobility management network element determines the identification information of the side link slice allowed by the first terminal according to the capability information of the access network device and the identification information of the side link slice subscribed by the first terminal.
  • the mobility management network element takes the intersection from the identification information of the side link slice subscribed by the first terminal and the identification information of the side link slice that can be supported by the access network device.
  • the identification information of the uplink slice is determined as the identification information of the side link slice allowed by the first terminal.
  • the side link slices subscribed by the first terminal include side link slice 1, side link slice 2, side link slice 3, and side link slice 4.
  • the side link that the access network device can support Link slices include side uplink slice 1, side uplink slice 2, side uplink slice 4, side uplink slice 5, and side uplink slice 6, then the mobility management network element determines that the first terminal allows
  • the side link slices of are side link slice 1, side link slice 2, and side link slice 4.
  • the mobility management network element may also determine the identification information of the side link slice allowed by the first terminal and the corresponding relationship between the identification information of the side link slice subscribed by the first terminal and the identification information of the D2D service application. The corresponding relationship of the identification information of the D2D service application.
  • Step 408 The mobility management network element sends the identification information of the side link slice allowed by the first terminal to the first terminal.
  • the mobility management network element may also send the corresponding relationship between the identification information of the side link slice allowed by the first terminal and the identification information of the D2D service application to the first terminal.
  • the first terminal may send the identification information of the side link slice that the first terminal subscribes to, the identification information of the side link slice allowed by the first terminal, and the side link slice sent by the mobility management network element.
  • the corresponding relationship between the identification information of the D2D service application and the identification information of the D2D service application is stored, so that when the first terminal transmits the data of the D2D service application, the physical transmission resource corresponding to the side link slice corresponding to the D2D service application is used for transmission.
  • steps 401 to 408 are only for the first terminal to obtain the identification information of the side link slice that it has subscribed to, the identification information of the allowed side link slice, and the identification information of the side link slice.
  • the identification information of the D2D service application Take the correspondence relationship with the identification information of the D2D service application as an example.
  • Each terminal in the network can obtain the identification information of the side link slice that it has subscribed to and the identification information of the allowed side link slice according to the above steps 401-408. , And the correspondence between the identification information of the side link slice and the identification information of the D2D service application.
  • the mobility management network element may also send the identification information of the side link slice allowed by each terminal to the access network device, and the access network device slices the side link slice allowed by each terminal
  • the access network device can determine whether the side uplink slice is a side uplink slice allowed by the terminal, and if so, determine whether the terminal is allowed to use it.
  • the side link slice may also send the identification information of the side link slice allowed by each terminal to the access network device, and the access network device slices the side link slice allowed by each terminal.
  • the mobility management network element may also send the identification information of the side link slice subscribed by each terminal to the access network device, and the access network device saves the identification information of the side link slice subscribed by each terminal , It is convenient for the subsequent terminal to use a certain side uplink slice, the access network equipment judges whether the side uplink slice is the side uplink slice subscribed by the terminal, and if it is, judge whether it supports the side uplink slice. If supported, determine to allow the terminal to use the side link slice.
  • FIG. 5 is a communication method for discovering the second terminal according to an embodiment of the application, as shown in FIG. As shown, the method includes:
  • Step 501 The first terminal sends a broadcast message including identification information of the D2D service application.
  • the broadcast message further includes the identification information of the first terminal, so that the terminal supporting the D2D service application in the network can determine the first terminal according to the identification information of the first terminal, and send a response of the broadcast message to the first terminal.
  • the network includes terminal 1, terminal 2, terminal 3, terminal 4, and terminal 5.
  • Terminal 1 sends a broadcast message including identification information of terminal 1 and identification information of D2D service applications in the network.
  • Step 502 The terminal supporting the D2D service application sends a response of the broadcast message to the first terminal;
  • the response of the broadcast message is used to indicate that the terminal supports D2D service applications.
  • each terminal in the network determines whether it supports the D2D service application. If it does, it identifies the first terminal according to the identification information of the first terminal in the broadcast message, and Send a response to the broadcast message to the first terminal.
  • the response of the broadcast message includes identification information of the terminal supporting the D2D service application, so that the first terminal can identify the terminal supporting the D2D service application according to the identification information.
  • terminal 2 After terminal 2, terminal 3, terminal 4, and terminal 5 receive the broadcast message sent by terminal 1, they need to determine whether they support the D2D service application. Assume that terminal 3 finds that it supports the D2D service application. 3 sends a response to the broadcast message containing the identification information of the terminal 3 to the terminal 1, and the terminal 1 determines that the terminal 3 supports the D2D service application according to the response of the broadcast message.
  • the first terminal uses the above steps 501 and 502 to determine that a terminal supports D2D service applications, it can default that the terminal supports the side link slices corresponding to the D2D service applications. And determine the terminal as the second terminal.
  • the first terminal can also use the following steps 503 and 504 to determine that a terminal supports side-link slicing by defaulting that the terminal supports the D2D service application corresponding to the side-link slicing, and determine the terminal as The second terminal.
  • the first terminal can also use step 501, step 502, step 503, and step 504 to respectively determine the terminal that supports D2D service applications and the terminal that supports side link slicing, which will support both D2D service applications and side link slicing.
  • the terminal of the road slice is determined to be the second terminal.
  • Step 503 The first terminal sends a broadcast message including identification information of the side link slice.
  • the first terminal determines the identification information of the side link slice according to the correspondence between the identification information of the side link slice and the identification information of the D2D service application, and according to the identification information of the D2D service application.
  • the first terminal sends the identification information of the side link slice corresponding to the D2D service application to other terminals in the network, so that the first terminal can determine the terminal that supports the side link slice. For a sliced terminal, the first terminal can establish a side link corresponding to the side link slice with the terminal.
  • the broadcast message further includes the identification information of the first terminal, so that the terminal supporting the sidelink slicing in the network can determine the first terminal according to the identification information of the first terminal, and send the response of the broadcast message to the first terminal .
  • Step 504 The terminal that supports sidelink slicing sends a response of the broadcast message to the first terminal.
  • the response of the broadcast message may be used to indicate that the terminal supports sidelink slicing.
  • each terminal in the network receives the broadcast message sent by the first terminal, it determines whether the side-link slice is in the side-link slice of its own contract or in the allowed side-link slice. , It is determined that it supports the side link slicing, the first terminal is identified according to the identification information of the first terminal in the broadcast message, and the response of the broadcast message is sent to the first terminal.
  • the response of the broadcast message includes identification information of a terminal that supports side-link slicing, so that the first terminal can identify a terminal that supports side-link slicing according to the identification information.
  • terminal 2 After terminal 2, terminal 3, terminal 4, and terminal 5 receive the broadcast message sent by terminal 1, they need to determine whether they support side-link slicing. Assume that terminal 3 finds that it supports the side-link slicing. For path slicing, the terminal 3 sends a response to the broadcast message containing the identification information of the terminal 3 to the terminal 1, and the terminal 1 determines that the terminal 3 supports the side link slicing according to the response of the broadcast message.
  • the first terminal uses steps 503 and step 504 to determine that a certain terminal supports side-link slicing, and can default that the terminal supports the D2D service application corresponding to the side-link slicing.
  • Step 505 The first terminal determines the second terminal.
  • the first terminal when the first terminal uses steps 501 and 502 to determine that a terminal supports a D2D service application, it may default to the terminal to support the side link slice corresponding to the D2D service application, and determine the terminal as the second terminal.
  • the first terminal uses the above steps 503 and step 504 to determine that a terminal supports side-link slicing, it can default to the terminal to support the D2D service application corresponding to the side-link slicing, and determine the terminal as the first terminal. Two terminal.
  • the first terminal uses the above steps 501, 502, step 503, and step 504 to respectively determine a terminal that supports D2D service applications and a terminal that supports side-link slicing, it can simultaneously support D2D service applications and side-link slicing.
  • the terminal of the link slice is determined to be the second terminal.
  • the first terminal may send the side link slice to the terminal supporting the D2D service application.
  • the identification information does not need to broadcast the identification information of the side link slice in the network, reducing the signaling interaction in the network.
  • the terminal 1 may send the identification information of the terminal 1 and the identification information of the side link slice to the terminal 2.
  • the first terminal sends a broadcast message containing the identification information of the D2D service application and the identification information of the side link slice corresponding to the D2D service application, so that the terminal supporting the D2D service application and the side link slice can receive the broadcast
  • a response of the broadcast message is sent to the first terminal.
  • the first terminal determines the terminal corresponding to the response as the second terminal.
  • the method described in FIG. 5 can be used to find the second terminal in the network.
  • the first terminal when the first terminal determines that the second terminal can support D2D service applications and/or supports sidelink slicing, but it is not clear which terminal in the network is the second terminal, the first terminal can set the The identification information is carried in the broadcast message. After the terminal in the network determines that it is itself according to the identification information of the second terminal in the broadcast message, it sends a response to the broadcast message to the first terminal.
  • FIG. 6 is a communication method for determining that the first terminal is allowed to use the side-link slicing according to an embodiment of the application. As shown in FIG. 6, the method includes:
  • Step 601 The first terminal sends a third request to the access network device.
  • the third request includes identification information of the side uplink slice, and the third request is used to indicate a request to use the side uplink slice.
  • the first terminal sends a third request to the access network device before establishing the side link corresponding to the side link slice with the second terminal, and the access network device determines that the first terminal is allowed to use the side link.
  • the side link corresponding to the side link slice is established.
  • Step 602 The access network device receives the third request, and determines whether to allow the first terminal to use the side link slice according to the third request.
  • the access network device may compare the number of established side links corresponding to the side link slice with a preset number threshold, where for different side link slices, each The number of side links that can be supported by each side link slice can be different, and the access network device can obtain the maximum value of the number of side links corresponding to each side link slice from the network management network element, that is, A preset number threshold. After the access network device receives the third request, it determines whether the number of established side links corresponding to the side link slice is less than the preset number threshold. If it is less, the first terminal is allowed to use it The side-link slicing allows the first terminal to establish the side-link corresponding to the side-link slicing.
  • the access network device verifies that the terminal has the right to use the side link slice, the first terminal is allowed to use the side link slice.
  • the access network device judges whether the side link slice in the third request is in the side link slice subscribed by the first terminal, and if so, it judges whether it supports the side link slice, and if so, Then the first terminal can be allowed to use the side link slice.
  • the access network device may receive the identification information of the side link slice subscribed by the first terminal from the mobility management network element.
  • the access network device supports the side link slice in the third request, the first terminal is allowed to use the side link slice.
  • the access network device may determine whether the side link slice in the third request is in the side link slice allowed by the first terminal, and if so, the first terminal is allowed to use the side link slice.
  • the access network device may receive the identification information of the side link slice allowed by the first terminal from the mobility management network element.
  • Step 603 The access network device sends a response to the third request to the first terminal.
  • the response to the third request is used to indicate that the first terminal is allowed to use the sidelink slice.
  • the access network device When the access network device determines that the first terminal is allowed to use the side link slice, it may send a response to the third request to the first terminal to inform the first terminal that the side link slice can be used, so that the first terminal can use the side link slice later.
  • the physical transmission resources corresponding to the side link slices perform data transmission.
  • the access network device may also send a response that the use of the side link slice is not allowed to the first terminal.
  • Step 604 The first terminal receives a response to the third request sent by the access network device, and determines, according to the response to the third request, that the first terminal is allowed to use the side link slice.
  • FIG. 7 is a method of establishing a side link between the first terminal and the second terminal according to an embodiment of the application.
  • the method includes:
  • Step 701 The first terminal sends a first request to the second terminal.
  • the first request includes the identification information of the side link slice
  • the first request is used to request the establishment of the side link corresponding to the side link slice
  • the layer 2 address of the first request is associated with the D2D service application, and the association
  • the relationship may be pre-configured in the first terminal or obtained by the first terminal from the network side in the process of registering with the network.
  • the first request may include the identification information of the second terminal, so that the second terminal can recognize the identification information and send a response to the first request to the first terminal.
  • the source Layer 2 address of the first request is the source two of the first terminal.
  • the first request can use the default access layer (access layer, AS layer) setting information in the prior art, so that the second terminal parses the first request.
  • the first terminal determines that the second terminal supports the D2D service application and also supports the side link slicing corresponding to the D2D service application, and determines that the access network device allows the first terminal to use the side link slicing, and then transfers to the first terminal.
  • the second terminal sends the first request.
  • Step 702 The second terminal receives the first request, and sends a response to the first request to the first terminal.
  • the second terminal identifies the identification information of the second terminal in the first request, and determines that the side link slice of the first request is in the pre-stored contracted side link slice or allowed side link slice At the time, the source layer 2 address of the first request is used as the destination layer 2 address, and the source layer 2 address of the second terminal is used as the source layer 2 address, and the response to the first request is sent to the first terminal, indicating that the side link is established success.
  • Step 703 The first terminal and the second terminal save the established correspondence between the side link and the side link slice.
  • the first terminal and the second terminal establish and save the corresponding relationship between the established side link and the side link slice, so as to facilitate the subsequent data transmission of the D2D service application, in the side link corresponding to the D2D service application.
  • the corresponding physical transmission resource of the side link slice is used for data transmission.
  • the first terminal and the second terminal can use the method described in Figure 8 9.
  • the method shown in FIG. 9 or FIG. 10 determines the physical transmission resources corresponding to the side-link slices, so that the physical transmission resources corresponding to the side-link slices are used to transmit D2D on the side links corresponding to the side-link slices.
  • Business application data
  • the first terminal is taken as an example to describe the process in which the terminal obtains the physical transmission resource corresponding to the side uplink slice.
  • FIG. 8 is this application An embodiment provides a method for a first terminal to obtain a physical transmission resource corresponding to a side link slice. As shown in FIG. 8, the method includes:
  • Step 801 The first terminal sends a fourth request to the access network device.
  • the fourth request includes the identification information of the side link slice; the fourth request is used to request to obtain the physical transmission resource corresponding to the side link slice.
  • the fourth request further includes QoS requirement information of the service application corresponding to the side link slice.
  • Step 802 The access network device receives the fourth request, and sends a response to the fourth request to the first terminal according to the fourth request.
  • the response to the fourth request includes the physical transmission resource corresponding to the side link slice allocated by the access network device to the first terminal.
  • the physical transmission resource corresponding to the side link slice allocated to the first terminal is selected from the physical transmission resource pool corresponding to the identification information of the side link slice.
  • the access network device determines the physical transmission resource corresponding to the side link slice for the first terminal according to the QoS requirement information of the service application sent by the first terminal.
  • Step 803 The first terminal receives the response of the fourth request, and determines the physical transmission resource corresponding to the side link slice according to the response of the fourth request.
  • the first terminal may dynamically request the physical transmission resource corresponding to the side uplink slice from the access network device, that is, the first terminal may continuously schedule the physical transmission resource corresponding to the side uplink slice.
  • the method described in FIG. 8 is that the first terminal sends a fourth request message to the access network device to request the access network device for the physical transmission resource corresponding to the side link slice.
  • the first terminal may report the related information of the established side link to the access network device, where the related information of the side link includes identification information of the side link slice corresponding to the side link; After receiving the related information of the side uplink, the access network device issues the physical transmission resource corresponding to the side uplink slice to the first terminal according to the identification information of the side uplink slice.
  • the first terminal when the first terminal is in the network coverage area and is in an idle state, the first terminal can use the method described in FIG. 9 to obtain the physical transmission resources corresponding to the side link slice, which is shown in FIG.
  • An application embodiment provides a method for a first terminal to obtain a physical transmission resource corresponding to a side link slice. As shown in FIG. 9, the method includes:
  • Step 901 The access network device sends the system information block SIB.
  • the SIB includes the correspondence between the identification information of one or more side link slices and the physical transmission resource pool.
  • Step 902 The first terminal receives the SIB, and determines the physical transmission resource according to the SIB.
  • the identification information of one or more side link slices includes the identification information of the side link slice for which the first terminal needs to obtain physical transmission resources; the first terminal is based on the identification information of the side link slice The corresponding relationship between the information and the physical transmission resource pool is determined, the physical transmission resource pool corresponding to the side link slice is determined, and the physical transmission resource is determined from the physical transmission resource pool according to the transmission requirements of the D2D service application.
  • the first terminal may save the correspondence between the identification information of the side link slice sent by the access network device and the physical transmission resource pool. When the first terminal is not in the network coverage, it may be determined according to the pre-stored correspondence Physical transmission resource pool, and determine the physical transmission resource from the physical transmission resource pool according to the transmission requirements of the D2D service application.
  • the access network device sends a broadcast message that includes the corresponding relationship between the identification information of the side link slice and the physical transmission resource, so that the first terminal can determine the physical link slice corresponding to the side link slice according to the broadcast message of the access network device.
  • Transmission resources when the first terminal is within the network coverage area, the first terminal can also use the method described in FIG. 10 to obtain the physical transmission resources corresponding to the side link slice.
  • FIG. 10 provides an example of this application. A method for a first terminal to obtain a physical transmission resource corresponding to a side link slice, as shown in FIG. 10, the method includes:
  • Step 1001 The first terminal sends a fifth request to a mobility management network element.
  • the fifth request includes identification information of the side link slice.
  • Step 1002 The mobility management network element receives the fifth request, and sends the fifth request to the policy control network element according to the fifth request.
  • the fifth request is used to request to obtain the physical transmission resource corresponding to the side link slice.
  • the first terminal may include the fifth request in the registration request during the process of registering with the network to reduce signaling interaction. It may also use the physical transmission resources corresponding to the side link slice to move The fifth request sent by the sex management network element is not restricted.
  • Step 1003 The policy control network element receives the fifth request, and sends a response to the fifth request to the mobility management network element according to the fifth request.
  • the response to the fifth request includes the correspondence between the identification information of the side link slice and the physical transmission resource pool.
  • Step 1004 The mobility management network element receives a response to the fifth request, and sends a response to the fifth request to the first terminal.
  • Step 1005 The first terminal receives the response of the fifth request, and determines the physical transmission resource according to the response of the fifth request.
  • the first terminal determines the physical transmission resource pool corresponding to the side link slice according to the correspondence between the identification information of the side link slice and the physical transmission resource pool, and selects the physical transmission resource pool from the physical transmission resource pool according to the transmission requirements of the D2D service application. Determine the physical transmission resources.
  • the first terminal may save the corresponding relationship between the identification information of the side link slice sent by the mobility management network element and the physical transmission resource pool.
  • the corresponding relationship may be stored in advance according to Determine the physical transmission resource pool, and determine the physical transmission resource from the physical transmission resource pool according to the transmission requirements of the D2D service application.
  • the policy control network element can also directly send the identification information of the side link slice to the first terminal through the mobility management network element and the corresponding relationship between the physical transmission resources, so that the first terminal can determine the side link according to the corresponding relationship. Physical transmission resources corresponding to the path slice.
  • the corresponding relationship between the identification information of the side link slice and the physical transmission resource described in Figures 8, 9 and 10 above, or the corresponding relationship between the identification information of the side link slice and the physical transmission resource pool It may be that the network management network element is pre-configured and stored in the access network device or the policy control network element; in the methods described in Figure 9 and Figure 10, for the same side link slice, the physical transmission determined by the access network device
  • the resource pool and the physical transmission resource pool determined by the policy control network element may be the same or different, that is, the correspondence between the identification information of the side link slice sent by the access network device and the physical transmission resource and the side line sent by the policy control network element
  • the corresponding relationship between the identification information of the link slice and the physical transmission resource may be the same or different.
  • the first terminal can obtain the physical transmission resources corresponding to the side-link slice in different ways under different connection management states, so that the first terminal and the second terminal can use the side-link
  • the physical transmission resources corresponding to the slices are used for communication, and the D2D communication between the terminals is realized by using the side link slicing method.
  • each device includes a hardware structure and/or software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the network nodes into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 11 shows a communication device, and the communication device 110 may be a first terminal or a chip or a system on a chip in the first terminal.
  • the communication device 110 may be used to perform the functions of the first terminal involved in the foregoing embodiments.
  • the communication device 110 shown in FIG. 11 includes: a processing module 1101.
  • the processing module 1101 is used to establish a side link between the first terminal and the second terminal, and the side link corresponds to the side link slice; the processing module 1101 is also used to pass the side link on the side link
  • the physical transmission resource corresponding to the uplink slice communicates with the second terminal.
  • the specific implementation of the communication device 110 may refer to the behavior function of the first terminal in the D2D communication method described in FIG. 3.
  • the communication device further includes a transceiver module 1102, the transceiver module 1102 is configured to send a first request including identification information of the sideline link slice to the second terminal, and the first request is used to establish the sideline link. road.
  • the transceiver module 1102 is further configured to send the first request to the second terminal according to the correspondence between the identification information of the D2D service application and the identification information of the side link slice; wherein, the side link uses It is used to transmit data of D2D business applications.
  • the above transceiver module 1102 is also used to send a second request including capability information of the first terminal to the mobility management network element; the capability information is used to indicate that the first terminal supports D2D communication; the transceiver module 1102, It is used to receive a response to the second request from the mobility management network element that includes the correspondence between the identification information of the D2D service application and the identification information of the side link slice.
  • the transceiver module 1102 is further configured to send the first request to the second terminal if the first terminal determines that the second terminal supports sidelink slicing.
  • the transceiver module 1102 is also used to send a broadcast message including the identification information of the side link slice; the transceiver module 1102 is also used to receive a message from the second terminal that is used to instruct the second terminal to support the side link. The response to the broadcast message of the link slice.
  • the transceiver module 1102 is further configured to send the first request to the second terminal if the first terminal determines that the access network device is allowed to use the sidelink slicing.
  • the transceiver module 1102 is also used to send a third request including the identification information of the side link slice to the access network device; the transceiver module 1102 is also used to receive information from the access network device A response to the third request indicating that the use of side link slices is allowed.
  • the processing module 1101 is also used to determine physical transmission resources.
  • the transceiver module 1102 is also used to send a fourth request including the identification information of the side link slice to the access network device; the transceiver module 1102 is also used to receive the first terminal from the access network device The response to the fourth request including the physical transmission resource.
  • the transceiver module 1102 is also used to receive a system information block (SIB) from the access network device that includes the correspondence between the identification information of the side link slice and the physical transmission resource.
  • SIB system information block
  • the transceiver module 1102 is also used to receive the system information block SIB including the correspondence between the identification information of the side link slice and the physical transmission resource pool from the access network device; the processing module 1101 also uses According to the physical transmission resource pool, the physical transmission resource is determined.
  • the transceiver module 1102 is also used to send a fifth request including identification information of the side link slice to the mobility management network element; the transceiver module 1102 is also used to receive information from the mobility management network element.
  • the response to the fifth request including the correspondence between the identification information of the side link slice and the physical transmission resource pool; the processing module 1101 is further configured to determine the physical transmission resource according to the physical transmission resource pool.
  • the transceiver module 1102 is also used to send the fifth request including the identification information of the side link slice; the transceiver module 1102 is also used to receive the side link slice from the mobility management network element. In response to the fifth request for the correspondence between the identification information and the physical transmission resource.
  • the processing module 1101 in FIG. 11 can be replaced by a processor, and the transceiver module 1102 can be replaced by a transceiver.
  • the processor can integrate the functions of the processing module 1101, and the transceiver can integrate the transceiver module 1102.
  • the communication device 110 shown in FIG. 11 may also include a memory.
  • the processing module 1101 is replaced by a processor and the transceiver module 1102 is replaced by a transceiver
  • the communication device 110 involved in the embodiment of the present application may be the communication device shown in FIG. 2.
  • FIG. 12 shows a structural diagram of a communication device 120.
  • the communication device 120 may be a second terminal or a chip or a system on a chip in the second terminal.
  • the communication device 120 may be used to perform the functions of the second terminal involved in the foregoing embodiments.
  • the communication device 120 shown in FIG. 12 includes: a transceiver module 1201.
  • the transceiver module 1201 is configured to receive a first request from the first terminal including identification information of the side link slice; the first request is used to establish a side link between the first terminal and the second terminal; the side link The road corresponds to the side link slice;
  • the transceiver module 1201 is configured to send a response to the first request indicating that the side link is successfully established to the first terminal.
  • the specific implementation of the communication device 120 may refer to the behavior function of the second terminal in the D2D communication method described in FIG. 5 and FIG. 7.
  • the foregoing transceiver module 1201 is specifically configured to send a response to the first request to the first terminal if the second terminal has the right to use the side link slicing.
  • the above-mentioned transceiver module 1201 is further configured to receive the identification information of one or more side link slices for which the second terminal of the mobility management network element has usage rights.
  • the transceiver module 1201 in FIG. 12 can be replaced by a transceiver, which can integrate the functions of the transceiver module 1201.
  • the communication device 120 shown in FIG. 12 may also include a memory.
  • the communication device 120 involved in the embodiment of the present application may be the communication device shown in FIG. 2.
  • FIG. 13 shows a communication device.
  • the communication device 130 may be an access network device or a chip or a system on a chip in the access network device.
  • the communication device 130 may be used to perform the functions of the access network equipment involved in the foregoing embodiments.
  • the communication device 130 shown in FIG. 13 includes: a transceiver module 1301.
  • the transceiver module 1301 is configured to broadcast to the terminal a system information block SIB including the correspondence between the identification information of multiple side link slices and the physical transmission resource pool.
  • the transceiver module 1301 is configured to receive a fourth request from the terminal that includes the identification information of the side link slice, where the identification information of the one or more side link slices includes the side link slice. Identification information of the path slice; the transceiver module 1301 is further configured to send a response to the terminal including the fourth request of the physical transmission resource corresponding to the side link slice.
  • the transceiver module 1301 is also used to receive a third request from the terminal including the identification information of the sideline link slice; the transceiver module 1301 is also used to send to the terminal an indication that the sideline link is allowed to be used. The response to the third request of the road slice.
  • the transceiver module 1301 is specifically configured to, if the access network device determines that the number of established side links corresponding to the side link slice is less than the preset number threshold, the access network device sends the first link to the terminal. Responses to three requests, where the preset number threshold is the maximum value of the number of side links corresponding to the side link slice.
  • the transceiver module 1301 is specifically configured to send a response to the third request to the terminal if the access network device verifies that the terminal has the right to use the side link slicing.
  • the transceiver module 1301 is specifically also used to receive the identification information of one or more side link slices for which the terminal of the mobility management network element has usage rights.
  • the transceiver module 1301 is specifically configured to send a response to the third request to the terminal if the access network device supports sidelink slicing.
  • the transceiver module 1301 in FIG. 13 can be replaced by a transceiver, which can integrate the functions of the transceiver module 1301.
  • the communication device 130 shown in FIG. 13 may also include a memory.
  • the communication device 130 involved in the embodiment of the present application may be the communication device shown in FIG. 2.
  • the embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the foregoing method embodiments may be completed by a computer program instructing relevant hardware.
  • the program may be stored in the foregoing computer-readable storage medium. When the program is executed, it may include processes as in the foregoing method embodiments. .
  • the computer-readable storage medium may be an internal storage unit of the terminal (including the data sending end and/or the data receiving end) of any of the foregoing embodiments, such as the hard disk or memory of the terminal.
  • the above-mentioned computer-readable storage medium may also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart media card (SMC), a secure digital (SD) card, and a flash memory card. (flash card) and so on.
  • the aforementioned computer-readable storage medium may also include both an internal storage unit of the aforementioned terminal and an external storage device.
  • the aforementioned computer-readable storage medium is used to store the aforementioned computer program and other programs and data required by the aforementioned terminal.
  • the aforementioned computer-readable storage medium can also be used to temporarily store data that has been output or will be output.
  • At least one (item) refers to one or more
  • “multiple” refers to two or more than two
  • “at least two (item)” refers to two or three And three or more
  • "and/or” is used to describe the association relationship of the associated objects, indicating that there can be three kinds of relationships, for example, "A and/or B” can mean: there is only A, only B and A at the same time And B three cases, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an "or” relationship.
  • At least one item (a) refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one of a, b, or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, and c can be single or multiple.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be divided. It can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请实施例提供D2D通信方法、装置及系统，涉及通信技术领域，能够解决现有D2D通信中无法满足不同业务应用对服务质量的要求的技术问题。方法包括：第一终端建立第一终端与第二终端之间的侧行链路，侧行链路与侧行链路切片对应；第一终端在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。

Description

D2D通信方法、装置及系统 技术领域
本申请实施例涉及通信技术领域，尤其是涉及一种设备到设备(device-to-device，D2D)通信方法、装置及系统。
背景技术
通信的高速发展，视频聊天、虚拟现实(virtual reality，VR)、增强现实(Augmented Reality，AR)等业务类型的普遍使用使得用户对带宽的需求越来越大。为了满足用户的带宽需求，提出了D2D通信。其中，D2D通信可以允许用户设备(user equipment，UE)之间通过邻近通信5(Proximity Communication 5，PC5)接口进行通信，通过共享物理传输资源传输不同类型的D2D业务应用。
但是，不同的D2D业务应用对服务质量(quality of service，QoS)的要求是不同的，D2D通信的设备之间共享物理传输资源传输不同D2D业务应用时，由于物理传输资源池中的物理传输资源有限，所能达到D2D业务应用的服务质量有限，很难满足不同D2D业务应用对QoS的要求。
发明内容
本申请提供一种D2D通信方法、装置及系统，用以解决现有D2D通信中无法满足不同业务应用对服务质量的要求的问题。
第一方面，提供一种D2D通信方法，该方法包括：第一终端建立第一终端与第二终端之间与侧行链路切片对应的侧行链路，在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。
基于第一方面所述的方法，第一终端通过在第一终端与第二终端之间建立与侧行链路切片对应的侧行链路，并在该侧行链路上通过侧行链路切片对应的物理传输资源与第二终端进行通信，可以实现利用侧行链路切片的方式在终端间进行D2D通信；且由于不同的侧行链路切片对应的物理传输资源池可能不同，利用不同的物理传输资源池中的物理传输资源对不同的D2D业务应用的数据进行传输，可以满足不同D2D业务应用对服务质量的要求；同时，利用不同的物理传输资源池中的物理传输资源对D2D业务应用进行传输，还可以提高网络中的资源利用率。
在一种可能的设计中，第一终端建立第一终端与第二终端之间的侧行链路，包括：第一终端向第二终端发送包括侧行链路切片的标识信息的、用于建立侧行链路的第一请求。
基于该可能的设计，第一终端向第二终端发送包括侧行链路切片的标识信息的第一请求，可以使得第二终端根据该侧行链路切片的标识信息识别出侧行链路切片，从而在第一终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，第一终端向第二终端发送第一请求，包括：第一终端根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，向第二终端发送第一请求；其中，侧行链路用于传输D2D业务应用的数据。
基于该可能的设计，第一终端根据D2D业务应用确定对应的侧行链路切片，将侧行链路切片的标识信息发送给第二终端，以在第一终端和第二终端之间建立可以传输该D2D业 务应用数据的侧行链路。
在一种可能的设计中，第一终端向移动性管理网元发送包括第一终端的用于指示第一终端支持D2D通信的能力信息的第二请求，接收来自移动性管理网元的包括D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系的第二请求的响应。
基于该可能的设计，第一终端向移动性管理网元发送支持D2D通信的能力信息，移动性管理网元根据该能力信息将第一终端对应的D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系发送给第一终端，以使第一终端根据该对应关系，确定D2D业务应用对应的侧行链路切片，便于在第一终端与第二终端之间建立可以传输D2D业务应用数据的侧行链路，并在该侧行链路上，利用侧行链路切片对于的物理传输资源与第二终端进行通信。
在一种可能的设计中，第二请求可以为注册请求。
基于该可能的设计，第一终端可以在注册过程中，将第一终端的能力信息携带在注册请求中，以减少第一终端与移动性管理网元的信令交互。
在一种可能的设计中，第一终端向第二终端发送第一请求，包括：若第一终端确定第二终端支持侧行链路切片，第一终端向第二终端发送第一请求。
基于该可能的设计，第一终端在确定第二终端支持D2D业务应用对应的侧行链路切片时，向第二终端发送建立侧行链路的第一请求，可以避免向其余不支持该侧行链路切片的终端发送第一请求，减少与网络中其余终端的信令交互。
在一种可能的设计中，第一终端发送包括侧行链路切片的标识信息的广播消息；并接收来自第二终端的用于指示第二终端支持侧行链路切片的广播消息的响应。
基于该可能的设计，第一终端可以采用广播的形式在网络中广播侧行链路切片的标识信息，当网络中支持该侧行链路切片的第二终端接收到该广播消息后，向第一终端发送广播消息的响应，以使第一终端可以发现网络中支持该侧行链路切片的第二终端，便于在第一终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，第一终端向第二终端发送第一请求，包括：若第一终端确定接入网设备允许使用侧行链路切片，第一终端向第二终端发送第一请求。
基于该可能的设计，第一终端在确定接入网设备允许使用侧行链路切片时，向第二终端发送建立侧行链路的第一请求，为在第一终端和第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
一种可能的设计中，第一终端向接入网设备发送包括侧行链路切片的标识信息的第三请求；第一终端接收来自接入网设备的用于指示允许使用侧行链路切片的第三请求的响应。
基于该可能的设计，第一终端向接入网设备发送包括侧行链路切片的标识信息的第三请求，接入网设备根据接收到的请求判断是否允许第一终端使用该侧行链路切片，如果允许使用，向第一终端发送允许使用侧行链路切片的第三请求的响应，为在第一终端与第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
在一种可能的设计中，第一终端确定物理传输资源。
基于该可能的设计，第一终端根据侧行链路切片确定对应的物理传输资源，由于不同的侧行链路切片对应不同的物理传输资源池，利用不同的物理传输资源池中的物理传输资源对不同的D2D业务应用进行传输，可以满足不同D2D业务应用对服务质量的要求；同 时，利用不同的物理传输资源池中的物理传输资源对D2D业务应用进行传输，还可以提高网络中的资源利用率。
在一种可能的设计中，第一终端确定物理传输资源，包括：第一终端向接入网设备发送包括侧行链路切片的标识信息的第四请求，接收来自接入网设备的包括物理传输资源的第四请求的响应，其中，第四请求用于请求获取侧行链路切片的物理传输资源。
基于该可能的设计，第一终端可以直接向接入网设备发送第四请求，以获取接入网设备为第一终端分配的该侧行链路切片对应的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，第一终端确定侧行链路切片对应的物理传输资源，包括：第一终端接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源的对应关系的系统信息块(system information block，SIB)。
基于该可能的设计，第一终端根据接入网设备广播的系统信息块SIB中包括的侧行链路切片的标识信息与物理传输资源的对应关系，便可确定D2D业务应用对应的侧行链路切片对应的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，第一终端确定物理传输资源，包括：第一终端接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB，第一终端根据物理传输资源池，确定物理传输资源。
基于该可能的设计，第一终端根据接入网设备广播的系统信息块SIB中包括的侧行链路切片的标识信息与物理传输资源池的对应关系，便可确定D2D业务应用对应的侧行链路切片对应的物理传输资源池，从而从该物理传输资源池中确定传输D2D业务应用的数据需要的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，第一终端确定物理传输资源，包括：第一终端向移动性管理网元发送包括侧行链路切片的标识信息的第五请求，接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源池的对应关系的第五请求的响应；第一终端根据物理传输资源池，确定物理传输资源，其中，第五请求用于请求获取侧行链路切片对应的物理传输资源。
基于该可能的设计，第一终端通过向移动性管理网元发送第五请求，便可接收移动性管理网元发送的侧行链路切片的标识信息与物理传输资源池的对应关系，从而确定D2D业务应用对应的侧行链路切片对应的物理传输资源池，从而从该物理传输资源池中确定传输D2D业务应用的数据需要的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，第一终端向移动性管理网元发送包括侧行链路切片的标识信息的第五请求，接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源的对应关系的第五请求的响应。
基于该可能的设计，第一终端通过向移动性管理网元发送第五请求，便可接收移动性管理网元发送的侧行链路切片的标识信息与物理传输资源的对应关系，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
第二方面，提供了一种通信装置，通信装置可以实现上述第一方面或者第一方面可能 的设计中第一终端所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该通信装置包括：处理模块，收发模块。
处理模块，用于建立第一终端与第二终端之间的侧行链路，侧行链路与侧行链路切片对应；处理模块，收发模块，用于在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。
其中，该通信装置的具体实现方式可参考第一方面或第一方面的任一种可能的设计提供的D2D通信方法中第一终端的行为功能，基于第二方面所述的通信装置，第一终端通过在第一终端与第二终端之间建立与侧行链路切片对应的侧行链路，并在该侧行链路上通过侧行链路切片对应的物理传输资源与第二终端进行通信，可以实现利用侧行链路切片的方式在终端间进行D2D通信；且由于不同的侧行链路切片对应不同的物理传输资源池，利用不同的物理传输资源池中的物理传输资源对不同的D2D业务应用进行传输，可以满足不同D2D业务应用对服务质量的要求；同时，利用不同的物理传输资源池中的物理传输资源对D2D业务应用进行传输，还可以提高网络中的资源利用率。
在一种可能的设计中，收发模块，用于向第二终端发送包括侧行链路切片的标识信息的、用于建立侧行链路的第一请求。
基于该可能的设计，该通信装置的收发模块向第二终端发送包括侧行链路切片的标识信息的第一请求，可以使得第二终端根据该侧行链路切片的标识信息识别出侧行链路切片，从而在第一终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，收发模块，还用于根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，向第二终端发送第一请求；其中，侧行链路用于传输D2D业务应用的数据。
基于该可能的设计，第一终端根据D2D业务应用确定对应的侧行链路切片，将侧行链路切片的标识信息发送给第二终端，以在第一终端和第二终端之间建立传输该D2D业务应用数据的侧行链路。
在一种可能的设计中，通信装置还包括收发模块；上述收发模块，还用于向移动性管理网元发送包括第一终端的用于指示第一终端支持D2D通信的能力信息的第二请求；收发模块，用于接收来自移动性管理网元的包括D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系的第二请求的响应。
基于该可能的设计，该通信装置的收发模块向移动性管理网元发送支持D2D通信的能力信息，移动性管理网元根据该能力信息将第一终端对应的D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系发送给第一终端，以使第一终端根据该对应关系，确定D2D业务应用对应的侧行链路切片，便于在第一终端与第二终端之间建立可以传输D2D业务应用数据的侧行链路，并在该侧行链路上，利用侧行链路切片对于的物理传输资源与第二终端进行通信。
在一种可能的设计中，收发模块，还用于若第一终端确定第二终端支持侧行链路切片，第一终端向第二终端发送第一请求。
基于该可能的设计，该通信装置的处理模块在确定第二终端支持D2D业务应用对应的侧行链路切片时，向第二终端发送建立侧行链路的第一请求，可以避免向其余不支持该侧行链路切片的终端发送第一请求，减少与网络中其余终端的信令交互。
在一种可能的设计中，收发模块，还用于发送包括侧行链路切片的标识信息的广播消息；收发模块，还用于接收来自第二终端的用于指示第二终端支持侧行链路切片的广播消息的响应。
基于该可能的设计，该通信装置的收发模块可以采用广播的形式在网络中广播侧行链路切片的标识信息，当网络中支持该侧行链路切片的第二终端接收到该广播消息后，向第一终端发送广播消息的响应，以使第一终端可以发现网络中支持该侧行链路切片的第二终端，便于在第一终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，收发模块，还用于若第一终端确定接入网设备允许使用侧行链路切片，第一终端向第二终端发送第一请求。
基于该可能的设计，该通信装置的处理模块在确定接入网设备允许使用侧行链路切片时，向第二终端发送建立侧行链路的第一请求，为在第一终端和第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
在一种可能的设计中，收发模块，还用于向接入网设备发送包括侧行链路切片的标识信息的第三请求；收发模块，还用于接收来自接入网设备的用于指示允许使用侧行链路切片的第三请求的响应。
基于该可能的设计，该通信装置的收发模块向接入网设备发送包括侧行链路切片的标识信息的第三请求，接入网设备根据接收到的请求判断是否允许第一终端使用该侧行链路切片，如果允许使用，向第一终端发送允许使用连理切片的第三请求的响应，为在第一终端与第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
在一种可能的设计中，处理模块，还用于确定物理传输资源。
基于该可能的设计，该通信装置的处理模块根据侧行链路切片确定对应的物理传输资源，由于不同的侧行链路切片对应不同的物理传输资源池，利用不同的物理传输资源池中的物理传输资源对不同的D2D业务应用进行传输，可以满足不同D2D业务应用对服务质量的要求；同时，利用不同的物理传输资源池中的物理传输资源对D2D业务应用进行传输，还可以提高网络中的资源利用率。
在一种可能的设计中，收发模块，还用于向接入网设备发送包括侧行链路切片的标识信息的第四请求；收发模块，还用于第一终端接收来自接入网设备的包括物理传输资源的第四请求的响应。
基于该可能的设计，该通信装置的收发模块可以直接向接入网设备发送第四请求，以获取接入网设备为第一终端分配的该侧行链路切片对应的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，收发模块，还用于接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源的对应关系的SIB。
基于该可能的设计，该通信装置的处理模块根据接入网设备广播的系统信息块SIB中包括的侧行链路切片的标识信息与物理传输资源的对应关系，便可确定D2D业务应用对应的侧行链路切片对应的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，收发模块，还用于接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB；处理模块，还用于根据物理传 输资源池，确定物理传输资源。
基于该可能的设计，该通信装置的处理模块根据接入网设备广播的系统信息块SIB中包括的侧行链路切片的标识信息与物理传输资源池的对应关系，便可确定D2D业务应用对应的侧行链路切片对应的物理传输资源池，从而从该物理传输资源池中确定传输D2D业务应用的数据需要的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，收发模块，还用于向移动性管理网元发送包括侧行链路切片的标识信息的第五请求；收发模块，还用于接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源池的对应关系的第五请求的响应；处理模块，还用于根据物理传输资源池，确定物理传输资源。
基于该可能的设计，该通信装置的收发模块通过向移动性管理网元发送第五请求，便可接收移动性管理网元发送的侧行链路切片的标识信息与物理传输资源池的对应关系，从而确定D2D业务应用对应的侧行链路切片对应的物理传输资源池，从而从该物理传输资源池中确定传输D2D业务应用的数据需要的物理传输资源，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
在一种可能的设计中，收发模块，还用于发送包括侧行链路切片的标识信息的第五请求；收发模块，还用于接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源的对应关系的第五请求的响应。
基于该可能的设计，该通信装置的收发模块通过向移动性管理网元发送第五请求，便可接收移动性管理网元发送的侧行链路切片的标识信息与物理传输资源的对应关系，为第一终端确定侧行链路切片对应的物理传输资源提供了可行性方案。
第三方面，提供了一种通信装置，该通信装置可以为第一终端或者第一终端中的芯片或者片上系统。该通信装置可以实现上述各方面或者各可能的设计中第一终端所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该通信装置可以包括：处理器和收发器。处理器和收发器可以用于支持通信装置实现上述第一方面或者第一方面的任一种可能的设计中所涉及的功能。例如：处理器可以用于建立第一终端与第二终端之间的侧行链路，侧行链路与侧行链路切片对应；收发器可以用于在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。在又一种可能的设计中，所述通信装置还可以包括存储器，存储器，用于保存通信装置必要的计算机执行指令和数据。当该通信装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该通信装置执行如上述第一方面或者第一方面的任一种可能的设计所述的D2D通信方法。
其中，该通信装置的具体实现方式可参考第一方面或第一方面的任一种可能的设计提供的D2D通信方法中第一终端的行为功能。
第四方面，提供了一种通信装置，该通信装置包括一个或多个处理器和一个或多个存储器；一个或多个存储器与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序代码或计算机指令；当一个或多个处理器执行计算机指令时，使得通信装置执行如第一方面或者第一方面的任一可能的设计所述的D2D通信方法。
第五方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如第一方面或者第一 方面的任一可能的设计所述的D2D通信方法。
第六方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如第一方面或者第一方面的任一可能的设计所述的D2D通信方法。
其中，第三方面至第六方面中任一种设计方式所带来的技术效果可参见上述第一方面至第二方面的任一种可能的设计所带来的技术效果，不再赘述。
第七方面，提供了一种D2D通信方法，该方法包括：第二终端接收来自第一终端的包括侧行链路切片的标识信息的第一请求；第一请求用于建立第一终端和第二终端之间的侧行链路；侧行链路与侧行链路切片对应；第二终端向第一终端发送用于指示侧行链路建立成功的第一请求的响应。
基于第七方面所述的方法，第二终端可以根据接收到的包括侧行链路切片的标识信息的第一请求，识别出侧行链路切片，当第二终端支持建立与侧行链路切片对应的侧行链路时，向第一终端发送第一请求的响应，在第一终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，第二终端向第一终端发送第一请求的响应，包括：若所述第二终端具有使用所述侧行链路切片的使用权限，则第二终端向第一终端发送第一请求的响应。
基于该可能的设计，第二终端在接收在第一终端的第一请求后，判断第一请求中携带的侧行链路切片是否在第二终端签约的侧行链路切片或者允许的侧行链路切片中，如果在，认为第二终端支持该侧行链路切片，可以建立该侧行链路切片对应的侧行链路，第二终端在支持该侧行链路切片时，向第一终端发送第一请求的响应，告知第一终端侧行链路建立成功。
在一种可能的设计中，第二终端具有使用侧行链路切片的权限包括以下情形：侧行链路切片属于第二终端签约的侧行链路切片；侧行链路切片属于第二终端允许的侧行链路切片，其中，第二终端允许的侧行链路切片为移动性管理网元结合第二终端签约的侧行链路切片和接入网设备的能力信息确定的。
在一种可能的设计中，该方法还包括：第二终端接收来自移动性管理网元的第二终端具有使用权限的一个或多个侧行链路切片的标识信息。
基于该可能的设计，第二终端通过接收来自移动性管理网元的签约的侧行链路切片和/或允许的侧行链路切片，为第二终端判断是否支持第一终端发送的第一请求中的侧行链路切片提供了可行性方案。
第八方面，提供了一种通信装置，通信装置可以实现上述第七方面或者第七方面可能的设计中第二终端所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该通信装置包括：收发模块。
收发模块，用于接收来自第一终端的包括侧行链路切片的标识信息的第一请求；第一请求用于建立第一终端和第二终端之间的侧行链路；侧行链路与侧行链路切片对应；
收发模块，用于向第一终端发送用于指示侧行链路建立成功的第一请求的响应。
其中，该通信装置的具体实现方式可参考第七方面或第七方面的任一种可能的设计提供的D2D通信方法中第二终端的行为功能，基于第八方面所述的通信装置，第二终端可以根据接收到的包括侧行链路切片的标识信息的第一请求，识别出侧行链路切片，当第二终端支持建立与侧行链路切片对应的侧行链路时，向第一终端发送第一请求的响应，在第一 终端与第二终端之间建立与该侧行链路切片对应的侧行链路。
在一种可能的设计中，通信装置还包括处理模块，上述收发模块，具体用于若所述处理模块确定所述第二终端具有使用所述侧行链路切片的使用权限，向第一终端发送第一请求的响应。
基于该可能的设计，第二终端在接收在第一终端的第一请求后，判断第一请求中携带的侧行链路切片是否在第二终端签约的侧行链路切片或者允许的侧行链路切片中，如果在，认为第二终端支持该侧行链路切片，可以建立该侧行链路切片对应的侧行链路，第二终端在支持该侧行链路切片时，向第一终端发送第一请求的响应，告知第一终端侧行链路建立成功。
在一种可能的设计中，第二终端具有使用侧行链路切片的权限包括以下情形：侧行链路切片属于第二终端签约的侧行链路切片；侧行链路切片属于第二终端允许的侧行链路切片，其中，第二终端允许的侧行链路切片为移动性管理网元结合第二终端签约的侧行链路切片和接入网设备的能力信息确定的。
在一种可能的设计中，上述收发模块，还用于接收来自移动性管理网元的第二终端具有使用权限的一个或多个侧行链路切片的标识信息。
基于该可能的设计，第二终端通过接收来自移动性管理网元的签约的侧行链路切片和/或允许的侧行链路切片，为第二终端判断是否支持第一终端发送的第一请求中的侧行链路切片提供了可行性方案。
第九方面，提供了一种通信装置，该通信装置可以为第二终端或者第二终端中的芯片或者片上系统。该通信装置可以实现上述各方面或者各可能的设计中第二终端所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该通信装置可以包括：收发器。收发器可以用于支持通信装置实现上述第七方面或者第七方面的任一种可能的设计中所涉及的功能。例如，收发器可以用于接收来自第一终端的包括侧行链路切片的标识信息的第一请求，第一请求用于建立第一终端和第二终端之间的侧行链路，侧行链路与侧行链路切片对应；收发器还可以用于通过通信接口向第一终端发送用于指示侧行链路建立成功的第一请求的响应。在又一种可能的设计中，所述通信装置还可以包括存储器，存储器，用于保存通信装置必要的计算机执行指令和数据。当该通信装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该通信装置执行如上述第七方面或者第七方面的任一种可能的设计所述的D2D通信方法。
其中，该通信装置的具体实现方式可参考第七方面或第七方面的任一种可能的设计提供的D2D通信方法中第二终端的行为功能。
第十方面，提供了一种通信装置，该通信装置包括一个或多个处理器和一个或多个存储器；一个或多个存储器与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序代码或计算机指令；当一个或多个处理器执行计算机指令时，使得通信装置执行如第七方面或者第七方面的任一可能的设计所述的D2D通信方法。
第十一方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如第七方面或者第七方面的任一可能的设计所述的D2D通信方法。
第十二方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得 计算机执行如第七方面或者第七方面的任一可能的设计所述的D2D通信方法。
其中，第九方面至第十二方面中任一种设计方式所带来的技术效果可参见上述第七方面至第八方面的任一种可能的设计所带来的技术效果，不再赘述。
第十三方面，提供了一种D2D通信方法，该方法包括：接入网设备向终端广播包括多个侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB。
基于第十三方面所述的方法，接入网设备可以直接将侧行链路切片的标识信息与物理传输资源池的对应关系广播出去，使得各终端根据接入网设备广播的系统信息块SIB确定各自对应的侧行链路切片的物理传输资源池，从而从物理传输资源池中确定传输D2D业务应用对应的物理传输资源。
在一种可能的设计中，该方法还包括：接入网设备接收来自终端的包括侧行链路切片的标识信息的第四请求；其中，上述一个或多个侧行链路切片的标识信息包括该侧行链路切片的标识信息；接入网设备向终端发送包括侧行链路切片对应的物理传输资源的第四请求的响应。
基于该可能的设计，接入网设备可以将侧行链路切片的标识信息与物理传输资源池的对应关系以广播的形式告知各个终端，由终端从确定的物理传输资源池中确定物理传输资源；接入网设备也可以接收终端发送的第四请求，根据第四请求中的侧行链路切片，将为该终端分配的与侧行链路切片对应的物理传输资源发送给终端。
在一种可能的设计中，该方法还包括：接入网设备接收来自终端的包括侧行链路切片的标识信息的第三请求；接入网设备向终端发送用于指示允许使用所述侧行链路切片的第三请求的响应。
基于该可能的设计，接入网设备在接收到终端发送的第三请求后，判断是否允许第一终端使用该侧行链路切片，如果允许使用，向第一终端发送允许使用连理切片的第三请求的响应，为在第一终端与第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
在一种可能的设计中，接入网设备向终端发送第三请求的响应，包括：若接入网设备确定侧行链路切片对应的已经建立的侧行链路的数量小于预设数量阈值，接入网设备向终端发送第三请求的响应，其中，预设数量阈值为侧行链路切片对应的侧行链路的数量的最大值。
基于该可能的设计，接入网设备判断当前支持的侧行链路的数量是否小于预设数量阈值，如果小于，表明接入网设备还可以支持侧行链路的建立，如果不小于，表明接入网设备当前支持的侧行链路的数量已经达到上限，为了保证已经建立的侧行链路的使用不受影响，无法再支持新的侧行链路的建立。接入网设备通过对支持的侧向链路的数量进行控制，可以保证已经建立的侧行链路的正常使用。
在一种可能的设计中，接入网设备向终端发送第三请求的响应，包括：若所述接入网设备验证所述终端具有使用所述侧行链路切片的权限，则所述接入网设备向所述终端发送所述第三请求的响应。
基于该可能的设计，当侧行链路切片在签约的侧行链路切片中，且接入网支持该侧行链路切片时，接入网设备向终端发送第三请求的响应，为侧行链路切片对应的侧行链路的成功建立提供保障。
在一种可能的设计中，接入网设备接收来自移动性管理网元的终端具有使用权限的一 个或多个侧行链路切片的标识信息。
在一种可能的设计中，终端具有使用侧行链路切片的权限包括以下情形：侧行链路切片属于终端签约的侧行链路切片；侧行链路切片属于终端允许的侧行链路切片，其中，终端允许的侧行链路切片为移动性管理网元结合终端签约的侧行链路切片和接入网设备的能力信息确定的。
在一种可能的设计中，接入网设备向终端发送第三请求的响应，包括：若所述接入网设备支持侧行链路切片，则接入网设备向终端发送第三请求的响应。
基于该可能的设计，当侧行链路切片在允许的侧行链路切片中时，接入网设备向终端发送第三请求的响应，为侧行链路切片对应的侧行链路的成功建立提供保障。
第十四方面，提供了一种通信装置，通信装置可以实现上述第十三方面或者第十三方面可能的设计中接入网设备所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该通信装置包括：收发模块。
收发模块，用于向终端广播包括多个侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB。
其中，该通信装置的具体实现方式可参考第十三方面或第十三方面的任一种可能的设计提供的D2D通信方法中接入网设备的行为功能，基于第十四方面所述的通信装置，接入网设备可以直接将侧行链路切片的标识信息与物理传输资源池的对应关系广播出去，使得各终端根据接入网设备广播的系统信息块SIB确定各自对应的侧行链路切片的物理传输资源池，从而从物理传输资源池中确定传输D2D业务应用对应的物理传输资源。
在一种可能的设计中，通信装置还包括收发模块，收发模块用于接收来自终端的包括侧行链路切片的标识信息的第四请求；其中，上述一个或多个侧行链路切片的标识信息包括该侧行链路切片的标识信息；收发模块，还用于向终端发送包括侧行链路切片对应的物理传输资源的第四请求的响应。
基于该可能的设计，接入网设备可以将侧行链路切片的标识信息与物理传输资源池的对应关系以广播的形式告知各个终端，由终端从确定的物理传输资源池中确定物理传输资源；接入网设备也可以接收终端发送的第四请求，根据第四请求中的侧行链路切片，将为该终端分配的与侧行链路切片对应的物理传输资源发送给终端。
在一种可能的设计中，收发模块，还用于接收来自终端的包括侧行链路切片的标识信息的第三请求；收发模块，还用于向终端发送用于指示允许使用侧行链路切片的第三请求的响应。
基于该可能的设计，接入网设备在接收到终端发送的第三请求后，判断是否允许第一终端使用该侧行链路切片，如果允许使用，向第一终端发送允许使用连理切片的第三请求的响应，为在第一终端与第二终端之间成功建立侧行链路切片对应的侧行链路提供保障。
在一种可能的设计中，收发模块，具体用于若接入网设备确定侧行链路切片对应的已经建立的侧行链路的数量小于预设数量阈值，向终端发送第三请求的响应，其中，预设数量阈值为侧行链路切片对应的侧行链路的数量的最大值。
基于该可能的设计，接入网设备判断当前支持的侧行链路的数量是否小于预设数量阈值，如果小于，表明接入网设备还可以支持侧行链路的建立，如果不小于，表明接入网设备当前支持的侧行链路的数量已经达到上限，为了保证已经建立的侧行链路的使用不受影 响，无法再支持新的侧行链路的建立。接入网设备通过对支持的侧向链路的数量进行控制，可以保证已经建立的侧行链路的正常使用。
在一种可能的设计中，收发模块，具体用于若所述接入网设备验证所述终端具有使用所述侧行链路切片的权限，则所述接入网设备向所述终端发送所述第三请求的响应。
基于该可能的设计，当侧行链路切片在签约的侧行链路切片中，且接入网支持该侧行链路切片时，接入网设备向终端发送第三请求的响应，为侧行链路切片对应的侧行链路的成功建立提供保障。
在一种可能的设计中，接入网设备接收来自移动性管理网元的终端具有使用权限的一个或多个侧行链路切片的标识信息。
在一种可能的设计中，终端具有使用侧行链路切片的权限包括以下情形：侧行链路切片属于终端签约的侧行链路切片；侧行链路切片属于终端允许的侧行链路切片，其中，终端允许的侧行链路切片为移动性管理网元结合终端签约的侧行链路切片和接入网设备的能力信息确定的。
在一种可能的设计中，收发模块，具体用于若所述接入网设备支持侧行链路切片，则接入网设备向终端发送第三请求的响应。
基于该可能的设计，当侧行链路切片在允许的侧行链路切片中时，接入网设备向终端发送第三请求的响应，为侧行链路切片对应的侧行链路的成功建立提供保障。
第十五方面，提供了一种通信装置，该通信装置可以为接入网设备或者接入网设备中的芯片或者片上系统。该通信装置可以实现上述各方面或者各可能的设计中接入网设备所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该通信装置可以包括：收发器。收发器可以用于支持通信装置实现上述第十三方面或者第十三方面的任一种可能的设计中所涉及的功能。例如：收发器可以向终端广播包括多个侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB。在又一种可能的设计中，所述通信装置还可以包括存储器，存储器，用于保存通信装置必要的计算机执行指令和数据。当该通信装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该通信装置执行如上述第十三方面或者第十三方面的任一种可能的设计所述的D2D通信方法。
其中，该通信装置的具体实现方式可参考第十三方面或第十三方面的任一种可能的设计提供的D2D通信方法中接入网设备的行为功能。
第十六方面，提供了一种通信装置，该通信装置包括一个或多个处理器和一个或多个存储器；一个或多个存储器与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序代码或计算机指令；当一个或多个处理器执行计算机指令时，使得通信装置执行如第十三方面或者第十三方面的任一可能的设计所述的D2D通信方法。
第十七方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如第十三方面或者第十三方面的任一可能的设计所述的D2D通信方法。
第十八方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如第十三方面或者第十三方面的任一可能的设计所述的D2D通信方法。
其中，第十五方面至第十八方面中任一种设计方式所带来的技术效果可参见上述第十三方面至第十四方面的任一种可能的设计所带来的技术效果，不再赘述。
第十九方面，提供了一种通信系统，该通信系统包括如第二方面或第二方面的任一可能的设计所述的通信装置以及如第八方面或者第八方面的任一可能的设计所述的通信装置。
第二十方面，提供了一种通信系统，该通信系统包括如第二方面或第二方面的任一可能的设计所述的通信装置、如第八方面或者第八方面的任一可能的设计所述的通信装置以及如第十四方面或者第十四方面的任一可能的设计所述的通信装置。
附图说明
图1a为本申请实施例提供的一种通信系统的简化示意图；
图1b为本申请实施例提供的一种终端间利用侧行链路切片进行通信的简化示意图；
图2为本申请实施例提供的一种通信装置的组成示意图；
图3为本申请实施例提供的一种D2D通信方法示意图；
图4为本申请实施例提供的一种获取D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系的方法示意图；
图5为本申请实施例提供的一种发现第二终端的通信方法示意图；
图6为本申请实施例提供的一种确定允许第一终端使用侧行链路切片的通信方法示意图；
图7为本申请实施例提供的一种第一终端与第二终端建立侧行链路的方法示意图；
图8为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法示意图；
图9为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法示意图；
图10为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法示意图；
图11为本申请实施例提供的一种通信装置的组成示意图；
图12为本申请实施例提供的一种通信装置的组成示意图；
图13为本申请实施例提供的一种通信装置的组成示意图。
具体实施方式
下面结合说明书附图对本申请实施例的实施方式进行详细描述。
本申请实施例提供的D2D通信方法可用于支持D2D通信的任一通信系统，也可以用于支持车与任何事物(vehicle-to-everything，V2X)通信的任一通信系统，该通信系统可以为第三代合作伙伴计划(3rd generation partnership project，3GPP)通信系统，例如，长期演进(long term evolution，LTE)系统，又可以为第五代(5th generation，5G)移动通信系统、新空口(new radio，NR)系统、NR V2X系统以及其他下一代通信系统，也可以为非3GPP通信系统，不予限制。下面以图1a为例，对本申请实施例提供的D2D通信方法进行描述。
图1a是本申请实施例提供的一种通信系统的示意图，如图1a所示，该通信系统可以包括多个终端、接入网设备、核心网设备和数据网络(Data Network，DN)。终端可以位于接入网设备的小区覆盖范围内，也可以位于接入网设备的小区覆盖范围外。其中，终端可以通过上行链路(uplink，UL)与接入网设备进行空口通信，终端在UL上向接入网设 备发送数据，接入网设备将接收到的数据转发给核心网设备，由核心网设备对该数据进行处理，并将处理后的数据通过接入网设备下发给终端。如：终端在UL上通过上行链路物理层共享信道(physical sidelink share channel，PUSCH)向接入网设备发送上行数据，接入网设备将接收到的上行数据转发给核心网设备，核心网设备对该上行数据进行处理，将处理后的上行数据通过接入网设备下发给核心网设备；其中，转发终端至核心网设备的上行数据的接入网设备与转发核心网设备至终端的下行数据的接入网设备可以是同一个接入网设备，也可以是不同的接入网设备，具体可以由服务器确定。
终端也可以通过特定接口与核心网设备进行通信，如：终端可以通过N1接口与核心网设备中的接入和移动性管理功能(access and mobility management function，AMF)网元进行通信。
终端也可以通过侧行链路(sidelink，SL)与其他终端进行侧行通信或者D2D通信，在SL上向其他终端发送数据，如：在SL上通过侧行链路物理层共享信道(physical sidelink share channel，PSSCH)向其他终端发送侧行数据、在SL上通过侧行链路物理层反馈信道(physical sidelink feedback channel，PSFCH)向其他终端发送与接收到的侧行数据对应的侧行反馈控制信息(sidelink feedback control information，SFCI)等。D2D通信可以包括车与车的通信、车与行人的通信、车与基础设施的通信、无人机(unmanned aerial vehicle，UAV)与无人机之间的通信等，不予限制。需要说明的是，本申请实施例中，SL还可以称为直连链路或者PC5接口链路等，不予限制。
其中，图1a中的终端(terminal)可以称为用户设备(user equipment，UE)或者移动台(mobile station，MS)或者移动终端(mobile terminal，MT)等。具体的，图1a中的终端可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端还可以是虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、车载终端、具有车对车(vehicle-to-vehicle，V2V)通信能力的车辆、智能网联车、有无人机对无人机(UAV to UAV，U2U)通信能力的无人机等等，不予限制。
图1a中的接入网设备可以是任意一种具有无线收发功能的设备，主要用于实现无线物理控制功能、资源调度和无线资源管理、无线接入控制以及移动性管理等功能。具体的，该接入网设备可以为接入网(access network，AN)/无线接入网(radio access network，RAN)设备，还可以为由多个5G-AN/5G-RAN节点组成的设备，又可以为基站(nodeB，NB)、演进型基站(evolution nodeB，eNB)、下一代基站(generation nodeB，gNB)、收发点(transmission receive point，TRP)、传输点(transmission point，TP)、路边单元(road side unit，RSU)以及某种其它接入节点中的任一节点等，不予限制。
图1a中的核心网设备可以包括：接入和移动性管理功能(Access and Mobility Management Function，AMF)网元、会话管理功能(Session Management，SMF)网元、用户面功能(User Plane Function，UPF)网元、网络切片选择功能(Network Slice Selection Function，NSSF)网元、网络暴露功能(Network Exposure Function，NEF)网元、网络仓库功能(Network Repository Function，NRF)网元、策略控制功能(Policy Control Function，PCF)网元、统一数据管理(unified data management，UDM)网元和认证服务(authentication  server function，AUSF)网元等网络功能实体。虽然未示出，但除图1a所示网元外，图1a所示网络还可以包括统一数据存储库(unified data repository，UDR)网元、网络数据分析功能(network data analytics function，NWDAF)网元等。此外，网络还包括应用功能(Application Function，AF)实体，该AF实体可以是第三方的应用控制平台也可以是运营商自己的设备，AF实体可以为多个应用服务器提供服务。
图1a中的数据网络可以包括邻近服务功能(proximity service function，ProSe Function)网元。
需要说明的是本申请各个实施例中，ProSe Function网元可以替换策略控制网元，执行本申请各实施例中策略控制网元所执行的功能。
需要说明的是，本申请实施例的多个终端、接入网设备以及核心网设备都可以为一个或多个芯片，也可以为片上系统(system on chip，SOC)等。图1a仅为示例性附图，其包括的设备数量不受限制。此外，除图1a所示设备之外，该通信系统还可以包括其他设备。图1a中各个设备的名称、各个链路的命名不受限制，除图1a所示名称之外，各个设备、各个链路还可以命名为其他名称，如：终端与接入网设备之间通过用户设备(user equipment，Uu)接口进行通信，UL还可以命名为Uu链路等；终端与其他终端之间通过直连通信接口PC5接口直连通信，SL还可以命名为PC5链路或者直连链路等，不予限制。
目前，在图1a所示的通信系统中，D2D通信可以允许各个终端之间通过PC5接口进行通信，在小区网络的控制下与小区用户共享物理传输资源传输不同类型的D2D业务应用。但是，不同的D2D业务应用的服务质量(quality of service，QoS)要求是不同的，D2D通信的设备之间共享物理传输资源传输不同D2D业务应用时，由于物理传输资源池中的物理传输资源有限，所能达到D2D业务应用的服务质量有限，很难满足不同D2D业务应用的QoS要求。
为解决该问题，本申请实施例提供一种D2D通信方法，通过将D2D通信网络划分成多个侧行链路切片，不同的D2D业务应用对应不同的侧行链路切片，多个侧行链路切片对应多个物理传输资源池中的物理传输资源，使得终端可以在侧行链路切片对应的侧行链路上利用侧行链路切片对应的物理传输资源传输侧行链路切片对应的D2D业务应用的数据，从而实现利用侧行链路切片的方式在终端间进行D2D通信，满足不同D2D业务应用对服务质量的要求。具体的，该实现过程可参照下述图3-图10对应的实施例中所述。
需要说明的是，侧行链路切片(sidelink slice)可以称为侧行链路网络切片，是具备特定网络特性的逻辑网络，是满足3GPP提出的D2D通信网络关于网络需求的关键技术。不同侧行链路切片之间逻辑上是隔离的，它可以按照需求方的要求灵活地提供一种或者多种网络服务；如图1b所示，终端1与终端2之间可以利用侧行链路切片1对应的物理传输资源进行通信，终端1与终端2之间也可以利用侧行链路切片2对应的物理传输资源进行通信，终端1与终端3之间可以利用侧行链路切片3对应的物理传输资源进行通信，终端2与终端3之间可以利用侧行链路切片4对应的物理传输资源进行通信。
具体实现时，图1a所示，如：各个终端、接入网设备和核心网设备均可以采用图2所示的组成结构，或者包括图2所示的部件。图2为本申请实施例提供的一种通信装置200的组成示意图，该通信装置200可以为终端或者终端中的芯片或者片上系统；也可以为接入网设备或者接入网设备中的芯片或者片上系统；也可以为核心网设备或者核心网设备中 的芯片或者片上系统。如图2所示，该通信装置200包括处理器201，收发器202以及通信线路203。
进一步的，该通信装置200还可以包括存储器204。其中，处理器201，存储器204以及收发器202之间可以通过通信线路203连接。
其中，处理器201是中央处理器(central processing unit，CPU)、通用处理器网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)或它们的任意组合。处理器201还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不予限制。
收发器202，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。收发器202可以是模块、电路、收发器或者任何能够实现通信的装置。
通信线路203，用于在通信装置200所包括的各部件之间传送信息。
存储器204，用于存储指令。其中，指令可以是计算机程序。
其中，存储器204可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器204可以独立于处理器201存在，也可以和处理器201集成在一起。存储器204可以用于存储指令或者程序代码或者一些数据等。存储器204可以位于通信装置200内，也可以位于通信装置200外，不予限制。处理器201，用于执行存储器204中存储的指令，以实现本申请下述实施例提供的D2D通信方法。
在一种示例中，处理器201可以包括一个或多个CPU，例如图2中的CPU0和CPU1。
作为一种可选的实现方式，通信装置200包括多个处理器，例如，除图2中的处理器201之外，还可以包括处理器207。
作为一种可选的实现方式，通信装置200还包括输出设备205和输入设备206。示例性地，输入设备206是键盘、鼠标、麦克风或操作杆等设备，输出设备205是显示屏、扬声器(speaker)等设备。
需要指出的是，通信装置200可以是台式机、便携式电脑、网络服务器、移动手机、平板电脑、无线终端、嵌入式设备、芯片系统或有图2中类似结构的设备。此外，图2中示出的组成结构并不构成对该通信装置的限定，除图2所示部件之外，该通信装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
此外，本申请的各实施例之间涉及的动作、术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。
下面结合图1a所示通信系统，以第一终端与第二终端在侧行链路切片对应的侧行链路 上传输数据为例，对本申请实施例提供的D2D通信方法进行描述。其中，第一终端可以为图1a中的任一终端，第二终端可以为图1a中能够与第一终端进行SL通信的任一终端，下述实施例所述的第一终端和第二终端可以具备图2所示部件。
图3为本申请提供的一种D2D通信方法的流程图，如图3所示，该方法可以包括：
步骤301、第一终端建立第一终端与第二终端之间的侧行链路。
其中，该侧行链路可以与侧行链路切片对应。在D2D通信网络中，存在多个侧行链路切片，不同的侧行链路切片可以满足一个或者多个不同的D2D业务应用的传输需求。例如，D2D通信网络中存在侧行链路切片1、侧行链路切片2、侧行链路切片3和侧行链路切片4，侧行链路切片1可以满足D2D业务应用1的传输需求，侧行链路切片2也可以满足D2D业务应用1的传输需求，侧行链路切片3可以满足D2D业务应用2的传输需求，侧行链路切片4也可以满足D2D业务应用2的传输需求。
实际应用过程中，第一终端在对D2D业务应用的数据进行传输时，可以根据D2D业务应用确定对应的侧行链路切片，建立该侧行链路切片对应的侧行链路，并利用该侧行链路传输当前业务数据。
示例性的，第一终端建立第一终端与第二终端之间的侧行链路可以包括：第一终端获取D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系确定D2D业务应用对应的侧行链路切片，建立该侧行链路切片对应的侧行链路。
其中，本申请各实施例中，D2D业务应用的标识信息可以用于指示D2D业务应用，该标识信息可以是D2D业务应用的身份信息，或者是其他用于指示D2D业务应用的信息，例如，可以是车联网应用或无人机通信应用等，具体可以是应用标识(application identifier，APP ID)，不予限制。侧行链路切片的标识信息可以用于指示侧行链路切片，该标识信息可以是侧行链路切片的身份信息，或者是其他用于指示侧行链路切片的信息，例如，可以是车联网通信切片或无人机通信切片等，具体可以是侧行链路切片标识(sidelink slice identifier,sidelink slice ID，不予限制。
其中，D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系中，侧行链路切片的标识信息可以包括第一终端具有使用权限的一个或多个侧行链路切片的标识信息，第一终端具有使用权限的一个或多个侧行链路切片的标识信息包括第一终端签约的侧行链路切片和/或第一终端允许的侧行链路切片；第一终端具有使用权限的一个或多个侧行链路切片的标识信息也可以描述为第一终端对应的侧行链路切片的标识信息。
第一终端签约的侧行链路切片、第一终端允许的侧行链路切片的相关描述、以及第一终端获取D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系的具体过程可参照下述图4所示。
可选的，为了保障第一终端与第二终端成功建立侧行链路，在执行步骤301之前，第一终端还需要进行下述条件(一)和/或条件(二)的判断，在满足条件(一)和/或条件(二)的情况下，再执行步骤301：
条件(一)、第二终端为支持侧行链路切片以及支持该侧行链路切片对应的D2D业务应用的终端。
其中，第二终端支持侧行链路切片可以为该侧行链路切片在第二终端签约的侧行链路 切片中或者在第二终端允许的侧行链路切片中。
示例性的，第一终端可以从与第一终端能够进行D2D通信的多个终端中，确定出支持侧行链路切片以及支持该侧行链路切片对应的D2D业务应用的第二终端，从而在第一终端与第二终端之间建立该侧行链路切片对应的侧行链路。
其中，第一终端从多个终端中确定第二终端的具体过程可参照下述图5所示。
条件(二)、允许第一终端使用侧行链路切片或者第一终端自身被允许使用侧行链路切片。
示例性的，第一终端可以获取来自接入网设备或者核心网设备的允许第一终端使用侧行链路切片的授权许可，当接入网设备或者核心网设备允许第一终端使用侧行链路切片时，第一终端可以在第一终端与第二终端之间建立该侧行链路切片对应的侧行链路。
其中，接入网设备或核心网设备判断是否允许第一终端使用侧行链路切片的具体过程可参照下述图6所示。
其中，本申请各实施例中，第一终端与第二终端建立侧行链路的具体过程可参照下述图7所示。
步骤302、第一终端在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。
其中，物理传输资源可以包括时域资源、频域资源或者空域资源中的一种或者多种，不予限制。物理传输资源可以包括在物理传输资源池中。
本申请各实施例中，多个侧行链路切片可以对应网络中的多个物理传输资源池；例如，D2D通信网络中存在侧行链路切片1、侧行链路切片2、侧行链路切片3和侧行链路切片4，存在物理传输资源池1和物理传输资源池2，其中，侧行链路切片1和侧行链路切片2可以对应物理传输资源池1，侧行链路切片3和侧行链路切片4可以对应物理传输资源池2；或者，侧行链路切片1对应物理传输资源池1和物理传输资源池2，侧行链路切片2对应物理传输资源池1，侧行链路切片3对应物理传输资源池2，侧行链路切片4对应物理传输资源池1和物理传输资源池2等；实际应用过程中，可以按照D2D业务应用的传输要求将该D2D业务应用对应的侧行链路切片对应到可满足该D2D业务应用的传输需求的物理传输资源池中。
可选的，第一终端在不同的连接管理状态下采用不同的方式获取侧行链路切片对应的物理传输资源。其中，不同的连接管理状态可以包括连接态(radio resource control connected，RRC connected)、空闲态(radio resource control idle，RRC idle)等多种状态。下面以第一终端处于RRC connected或者RRC idle为例，对第一终端获取侧行链路切片对应的物理传输资源进行描述：
(1)第一终端处于RRC connected。
示例性的，第一终端可以从接入网设备获取侧行链路切片对应的物理传输资源。
具体的，第一终端可以参照图8所示的方法获取侧行链路切片对应的物理传输资源。
(2)第一终端处于RRC idle。
示例性的，第一终端可以接收接入网设备发送包括物理传输资源池或者物理传输资源的广播消息，根据广播消息获取侧行链路切片对应的物理传输资源。具体的，该方法可以参照图9所示的方法。
示例性的，第一终端可以接收核心网设备发送的物理传输资源池或者物理传输资源，从而获取侧行链路切片对应的物理传输资源。具体的，该方法可以参照图10所示的方法。
基于上述图3所述的方法，第一终端通过在第一终端与第二终端之间建立与侧行链路切片对应的侧行链路，并在该侧行链路上通过侧行链路切片对应的物理传输资源与第二终端进行通信，可以实现利用侧行链路切片的方式在终端间进行D2D通信；且由于不同的侧行链路切片对应物理传输资源池可能不同，利用不同的物理传输资源池中的物理传输资源对不同的D2D业务应用的数据进行传输，可以满足不同D2D业务应用对服务质量的要求；同时，利用不同的物理传输资源池中的物理传输资源对D2D业务应用进行传输，还可以提高网络中的资源利用率。
上述步骤301中，第一终端获取D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系的具体过程可参照图4所示，图4为本申请实施例提供的一种获取D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系的方法，如图4所示，该方法包括：
步骤401、第一终端向移动性管理网元发送第二请求。
其中，该移动性管理网元可以是核心网设备中的AMF。
一种可能的设计中，第二请求包括第一终端的能力信息，该第二请求用于请求获取第一终端对应的侧行链路切片的相关信息。
其中，第一终端的能力信息可以是第一终端支持D2D通信的能力信息，也可以是第一终端支持V2X通信的能力信息。
第一终端的能力信息可以包括在第一终端的策略容器(Policy Container)中。
第一终端对应的侧行链路切片可以包括第一终端签约的侧行链路切片和/或第一终端允许的侧行链路切片；侧行链路切片的相关信息包括侧行链路切片的标识信息，和/或侧行链路切片的标识信息和D2D业务应用的标识信息的对应关系。
另一种可能的设计中，第二请求包括侧行链路切片的标识信息，该第二请求用于请求允许第一终端使用该侧行链路切片。
可选的，该第二请求还用于请求获取该侧行链路切片的相关信息，该相关信息包括该侧行链路切片与D2D业务应用的标识信息的对应关系，和/或该侧行链路切片对应的物理传输资源池或物理传输资源。
另一种可能的设计中，第二请求即包括第一终端的能力信息，也包括侧行链路切片的标识信息。
上述三种可能的设计中，第二请求还可以包括第一终端的标识信息以及其他信息等，不予限制。
可选的，第一终端可以在向网络注册的过程中，将第二请求携带在注册请求中发送给移动性管理网元，以减少信令交互。
步骤402、移动性管理网元接收第二请求，向策略控制网元发送第一终端的标识信息。
其中，策略控制网元可以是核心网设备中的PCF。
进一步的，移动性管理网元将第一终端的第二请求发送给策略控制网元。
可选的，为了减少网络中的信令交互，移动性管理网元可以在第一终端向网络注册的过程中，将第一终端的标识信息和/或第二请求携带在策略关联请求中发送给策略控制网元。
其中，在第一终端向网络注册的过程中，策略关联请求的相关描述与现有技术一致，不再赘述。
步骤403、策略控制网元接收第一终端的标识信息，根据第一终端的签约信息确定第一终端签约的侧行链路切片的标识信息，以及第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
示例性的，策略控制网元根据第一终端的标识信息识别出第一终端后，可以从核心网设备中的UDR处获取第一终端的签约信息。其中，UDR存储有各个终端的签约信息，每个终端的签约信息包括该终端签约的侧行链路切片的标识信息，以及侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
策略控制网元根据第一终端的签约信息，确定第一终端签约的侧行链路切片的标识信息，以及第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
进一步的，当策略控制网元还接收到移动性管理网元发送的第一终端的第二请求时，若第二请求包括第一终端的能力信息，策略控制网元根据第一终端的能力信息确定第一终端支持D2D通信或者V2X通信，根据第一终端的签约信息确定第一终端签约的侧行链路切片的标识信息，以及侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
若第二请求包括侧行链路切片的标识信息，策略控制网元可以判断该侧行链路切片是否在第一终端签约的侧行链路切片中，如果在，确定允许第一终端使用该侧行链路切片，否则，确定不允许第一终端使用该侧行链路切片。
可替换的，若第二请求包括侧行链路切片的标识信息，策略控制网元可以确定该侧行链路切片的相关信息，其中，该侧行链路切片的相关信息包括该侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系、该侧行链路切片对应的物理传输资源池、或该侧行链路切片对应的物理传输资源等信息。
可替换的，若第二请求包括侧行链路切片的标识信息，策略控制网元可以确定是否允许第一终端使用该侧行链路切片的授权结果，且确定该侧行链路切片的相关信息。
若第二请求包括第一终端的能力信息和侧行链路切片的标识信息，策略控制网元可以根据该第二请求确定以下信息：第一终端签约的侧行链路切片的相关信息、是否允许第一终端使用第二请求中携带的侧行链路切片的授权结果、或第二请求中携带的侧行链路切片的相关信息。
步骤404、策略控制网元向移动性管理网元发送第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
可选的，策略控制网元也可以将第一终端签约的侧行链路切片的标识信息发送给移动性管理网元，即步骤404中，策略控制网元可以向移动性管理网元发送第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系，或者，向移动性管理网元发送第一终端签约的侧行链路切片的标识信息、以及第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
进一步的，当策略控制网元还接收到移动性管理网元发送的第一终端的第二请求时，若第二请求包括第一终端的能力信息，策略控制网元将第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系发送给移动性管理网元。或者，策略控制网元将第一终端签约的侧行链路切片的标识信息发送给移动性管理网元。
若第二请求包括侧行链路切片的标识信息，可选的，策略控制网元将是否允许第一终端使用该侧行链路切片的授权结果发送给移动性管理网元；可选的，策略控制网元将该侧行链路切片的相关信息发送给移动性管理网元；可选的，策略控制网元将是否允许第一终端使用该侧行链路切片的授权结果，以及该侧行链路切片的相关信息都发送给移动性管理网元。
若第二请求包括第一终端的能力信息和侧行链路切片的标识信息，策略控制网元可以将以下信息中的一种或多种发送给移动性管理网元：第一终端签约的侧行链路切片的相关信息、是否允许第一终端使用第二请求中携带的侧行链路切片的授权结果、第二请求中携带的侧行链路切片的相关信息。
可选的，策略控制网元可以将需要发送给移动性管理网元的信息携带在第一终端的策略信息中向移动性管理网元发送，以减少信令交互。
其中，第一终端的策略信息为第一终端在向网络注册的过程中，策略控制网元为第一终端制定的策略，该策略信息的相关描述与现有技术一致，不再赘述。
步骤405、移动性管理网元接收第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系，向第一终端发送签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
可选的，移动性管理网元还可以向第一终端发送第一终端签约的侧行链路切片的标识信息。
示例性的，当移动性管理网元接收到第一终端的第二请求时，若第二请求包括第一终端的能力信息，移动性管理网元将第一终端签约的侧行链路切片的标识信息，以及第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系发送给第一终端。
其中，移动性管理网元可以从UDR中获取第一终端的签约信息，根据第一终端的签约信息确定第一终端签约的侧行链路切片的标识信息，或者，移动性管理网元也可以接收策略控制网元发送的第一终端签约的侧行链路切片的标识信息。
若第二请求包括侧行链路切片的标识信息，可选的，移动性管理网元将从策略控制网元接收到的是否允许第一终端使用该侧行链路切片的授权结果发送给第一终端；可选的，移动性管理网元将从策略控制网元接收到的第二请求中携带的侧行链路切片的相关信息发送给第一终端；可选的移动性管理网元将从策略控制网元接收到的是否允许第一终端使用该侧行链路切片的授权结果，以及第二请求中携带的侧行链路切片的相关信息发送给第一终端。
若第二请求包括第一终端的能力信息和侧行链路切片的标识信息，移动性管理网元将从策略控制网元接收到的以下信息中的一种或多种发送给第一终端：第一终端签约的侧行链路切片的相关信息、是否允许第一终端使用第二请求中携带的侧行链路切片的授权结果、第二请求中携带的侧行链路切片的相关信息。
可选的，移动性管理网元保存第一终端签约的侧行链路切片的标识信息作为第一终端上下文。
可选的，上述方法还可以包括下述步骤406、步骤407和步骤408，以使第一终端获取第一终端允许的侧行链路切片的相关信息。
步骤406、移动性管理网元获取接入网设备的能力信息。
其中，接入网设备的能力信息包括接入网设备可以支持的侧行链路切片的标识信息。
可选的，接入网设备可以通过下一代应用协议(next generation application protocol，NGAP)消息获取接入网设备的能力信息。
步骤407、移动性管理网元根据接入网设备的能力信息和第一终端签约的侧行链路切片的标识信息，确定第一终端允许的侧行链路切片的标识信息。
可选的，移动性管理网元从第一终端签约的侧行链路切片的标识信息与接入网设备可以支持的侧行链路切片的标识信息中，取交集，将处于交集中的侧行链路切片的标识信息确定为第一终端允许的侧行链路切片的标识信息。
例如，第一终端签约的侧行链路切片包括侧行链路切片1、侧行链路切片2、侧行链路切片3和侧行链路切片4，接入网设备可以支持的侧行链路切片包括侧行链路切片1、侧行链路切片2、侧行链路切片4、侧行链路切片5和侧行链路切片6，则移动性管理网元确定第一终端允许的侧行链路切片为侧行链路切片1、侧行链路切片2和侧行链路切片4。
进一步的，移动性管理网元还可以根据第一终端签约的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系，确定第一终端允许的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
步骤408，移动性管理网元向第一终端发送第一终端允许的侧行链路切片的标识信息。
进一步的，移动性管理网元还可以向第一终端发送第一终端允许的侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
更进一步的，第一终端可以将移动性管理网元发送的第一终端签约的侧行链路切片的标识信息、第一终端允许的侧行链路切片的标识信息、以及侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系进行保存，便于第一终端在传输D2D业务应用的数据时，利用D2D业务应用对应的侧行链路切片对应的物理传输资源进行传输。
需要说明的是，上述步骤401-步骤408仅是以第一终端获取自身签约的侧行链路切片的标识信息、允许的侧行链路切片的标识信息、以及侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系为例，网络中的各个终端均可以根据上述步骤401-步骤408获取自身签约的侧行链路切片的标识信息、允许的侧行链路切片的标识信息、以及侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系。
可选的，上述步骤408中，移动性管理网元也可以将各个终端允许的侧行链路切片的标识信息发送给接入网设备，接入网设备将各个终端允许的侧行链路切片的标识信息进行保存，便于后续终端在使用某一侧行链路切片时，接入网设备判断该侧行链路切片是否为该终端允许的侧行链路切片，如果是，确定允许终端使用该侧行链路切片。
可替换的，移动性管理网元也可以将各个终端签约的侧行链路切片的标识信息发送给接入网设备，接入网设备将各个终端签约的侧行链路切片的标识信息进行保存，便于后续终端在使用某一侧行链路切片时，接入网设备判断该侧行链路切片是否为终端签约的侧行链路切片，如果是，判断自身是否支持该侧行链路切片，如果支持，确定允许终端使用该侧行链路切片。
上述步骤301中，第一终端从多个终端中确定第二终端的具体过程可参照图5所示， 图5为本申请实施例提供的一种发现第二终端的通信方法，如图5所示，该方法包括：
步骤501、第一终端发送包括D2D业务应用的标识信息的广播消息。
可选的，该广播消息还包括第一终端的标识信息，便于网络中支持该D2D业务应用的终端根据第一终端的标识信息确定第一终端，并向第一终端发送广播消息的响应。
例如，如图5所示，网络中包括终端1、终端2、终端3、终端4和终端5，终端1在网络中发送包括终端1的标识信息和D2D业务应用的标识信息的广播消息。
步骤502、支持D2D业务应用的终端向第一终端发送广播消息的响应；
其中，广播消息的响应用于指示该终端支持D2D业务应用。
可选的，网络中的各个终端在接收到第一终端发送的广播消息后，判断自身是否支持该D2D业务应用，如果支持，根据广播消息中第一终端的标识信息识别出第一终端，并向第一终端发送广播消息的响应。
可选的，广播消息的响应包括支持D2D业务应用的终端的标识信息，便于第一终端根据标识信息识别出支持D2D业务应用的终端。
例如，如图5所示，终端2、终端3、终端4和终端5接收到终端1发送的广播消息之后，需确定自身是否支持D2D业务应用，假设终端3发现自身支持该D2D业务应用，终端3向终端1发送包含终端3的标识信息的广播消息的响应，终端1根据该广播消息的响应确定终端3支持该D2D业务应用。
由于D2D业务应用与侧行链路切片存在对应关系，当第一终端利用上述步骤501和502确定某终端支持D2D业务应用的时，可以默认该终端支持D2D业务应用对应的侧行链路切片，并将该终端确定为第二终端。
可替换的，第一终端也可以利用下述步骤503和步骤504在确定某终端支持侧行链路切片时，默认该终端支持侧行链路切片对应的D2D业务应用，并将该终端确定为第二终端。
可替换的，第一终端也可以利用步骤501、步骤502、步骤503和步骤504来分别确定支持D2D业务应用的终端以及支持侧行链路切片的终端，将同时支持D2D业务应用和侧行链路切片的终端确定为第二终端。
步骤503、第一终端发送包括侧行链路切片的标识信息的广播消息。
其中，第一终端根据侧行链路切片的标识信息与D2D业务应用的标识信息的对应关系，根据D2D业务应用的标识信息，确定侧行链路切片的标识信息。
示例性的，第一终端将D2D业务应用对应的侧行链路切片的标识信息发送给网络中的其他终端，便于第一终端确定支持侧行链路切片的终端，若存在支持侧行链路切片的终端，第一终端便可与该终端建立侧行链路切片对应的侧行链路。
可选的，该广播消息还包括第一终端的标识信息，便于网络中支持该侧行链路切片的终端根据第一终端的标识信息确定第一终端，并向第一终端发送广播消息的响应。
步骤504、支持侧行链路切片的终端向第一终端发送广播消息的响应。
其中，广播消息的响应可以用于指示该终端支持侧行链路切片。
可选的，网络中的各个终端在接收到第一终端发送的广播消息后，判断该侧行链路切片是否在自身签约的侧行链路切片或者允许的侧行链路切片中，如果在，确定自身支持该侧行链路切片，根据广播消息中第一终端的标识信息识别出第一终端，并向第一终端发送广播消息的响应。
可选的，广播消息的响应包括支持侧行链路切片的终端的标识信息，便于第一终端根据标识信息识别出支持侧行链路切片的终端。
例如，如图5所示，终端2、终端3、终端4和终端5接收到终端1发送的广播消息之后，需确定自身是否支持侧行链路切片，假设终端3发现自身支持该侧行链路切片，终端3向终端1发送包含终端3的标识信息的广播消息的响应，终端1根据该广播消息的响应确定终端3支持该侧行链路切片。
进一步的，第一终端利用步骤503和步骤504在确定某终端支持侧行链路切片时，可以默认该终端支持侧行链路切片对应的D2D业务应用。
步骤505、第一终端确定第二终端。
可选的，当第一终端利用上述步骤501和502确定某终端支持D2D业务应用的时，可以默认该终端支持D2D业务应用对应的侧行链路切片，并将该终端确定为第二终端。
可替换的，当第一终端利用上述步骤503和步骤504在确定某终端支持侧行链路切片时，可以默认该终端支持侧行链路切片对应的D2D业务应用，并将该终端确定为第二终端。
可替换的，当第一终端利用上述步骤501、步骤502、步骤503和步骤504来分别确定支持D2D业务应用的终端以及支持侧行链路切片的终端，可以将同时支持D2D业务应用和侧行链路切片的终端确定为第二终端。
进一步的，当第一终端按照上述步骤501、步骤502、步骤503和步骤504来确定第二终端时，在步骤503中，第一终端可以向支持D2D业务应用的终端发送侧行链路切片的标识信息，而无需在网络中广播侧行链路切片的标识信息，减少网络中的信令交互。
例如，当终端1根据步骤502中终端2发送的广播消息的响应确定终端2支持D2D业务应用时，终端1可以向终端2发送终端1的标识信息和侧行链路切片的标识信息。
可替换的，第一终端发送包含D2D业务应用的标识信息和D2D业务应用对应的侧行链路切片的标识信息的广播消息，以使支持D2D业务应用和侧行链路切片的终端接收到广播消息后，向第一终端发送广播消息的响应，第一终端在接收到的广播消息的响应后，将该响应对应的终端确定为第二终端。
需要说明的是，当第一终端并不清楚网络中的哪个终端可以支持D2D业务应用和侧行链路切片时，可以采用图5所述的方法在网络中发现第二终端。
可替换的，当第一终端确定第二终端可以支持D2D业务应用和/或支持侧行链路切片，但不清楚网络中的哪个终端为第二终端时，第一终端可以将第二终端的标识信息携带在广播消息中，当网络中的终端根据广播消息中第二终端的标识信息确定是自己后，向第一终端发送广播消息的响应。
上述步骤301中，接入网设备或核心网设备判断是否允许第一终端使用侧行链路切片的具体过程可参照图6所示，图6中以接入网设备判断是否允许第一终端使用侧行链路切片为例，图6为本申请实施例提供的一种确定允许第一终端使用侧行链路切片的通信方法，如图6所示，该方法包括：
步骤601、第一终端向接入网设备发送第三请求。
其中，第三请求包括侧行链路切片的标识信息，第三请求用于指示请求使用该侧行链路切片。
可选的，第一终端在与第二终端建立侧行链路切片对应的侧行链路之前，向接入网设备发送第三请求，在接入网设备确定允许第一终端使用该侧行链路切片时，建立侧行链路切片对应的侧行链路。
步骤602、接入网设备接收第三请求，根据第三请求确定是否允许第一终端使用侧行链路切片。
一种可能的设计中，接入网设备可以将该侧行链路切片对应的已经建立的侧行链路的数量与预设数量阈值进行对比，其中，对于不同的侧行链路切片，每个侧行链路切片所能支持的侧行链路的数量可以不同，接入网设备可以从网络管理网元处获取各个侧行链路切片对应的侧行链路的数量的最大值，即预设数量阈值，当接入网设备接收到第三请求后，判断该侧行链路切片对应的已经建立的侧行链路数量是否小于预设数量阈值，若小于，则允许第一终端使用该侧行链路切片，即允许第一终端建立该侧行链路切片对应的侧行链路。
另一种可能的设计中，若接入网设备验证终端具有使用侧行链路切片的权限，则允许第一终端使用该侧行链路切片。
具体的，接入网设备判断第三请求中的侧行链路切片是否在第一终端签约的侧行链路切片中，如果在，则判断自身是否支持该侧行链路切片，如果支持，则可以允许第一终端使用该侧行链路切片。
其中，接入网设备可以接收来自移动性管理网元发送的第一终端签约的侧行链路切片的标识信息。
另一种可能的设计中，若接入网设备支持第三请求中的侧行链路切片，则允许第一终端使用该侧行链路切片。
具体的，接入网设备可以判断第三请求中的侧行链路切片是否在第一终端允许的侧行链路切片中，如果在，则允许第一终端使用该侧行链路切片。
其中，接入网设备可以接收来自移动性管理网元发送的第一终端允许的侧行链路切片的标识信息。
步骤603、接入网设备向第一终端发送第三请求的响应。
其中，第三请求的响应用于指示第一终端允许使用该侧行链路切片。
接入网设备确定允许第一终端使用上述侧行链路切片时，可以向第一终端发送第三请求的响应，告知第一终端可以使用该侧行链路切片，便于第一终端后续利用该侧行链路切片对应的物理传输资源进行数据传输。
可选的，当接入网设备确定不允许第一终端使用上述侧行链路切片时，接入网设备也可以向第一终端发送不允许使用侧行链路切片的响应。
步骤604、第一终端接收接入网设备发送的第三请求的响应，根据第三请求的响应确定允许第一终端使用该侧行链路切片。
上述步骤301中，第一终端与第二终端建立侧行链路的具体过程可参照图7所示，图7为本申请实施例提供的一种第一终端与第二终端建立侧行链路的方法，如图7所示，该方法包括：
步骤701、第一终端向第二终端发送第一请求。
其中，第一请求包括侧行链路切片的标识信息，第一请求用于请求建立侧行链路切片 对应的侧行链路，第一请求的二层地址与D2D业务应用相关联，该关联关系可以为预配置在第一终端中或第一终端在向网络注册的过程中从网络侧获取。第一请求中可以包括第二终端的标识信息，便于第二终端对该标识信息进行识别并向第一终端发送第一请求的响应，第一请求的源二层地址为第一终端的源二层地址，第一请求可以使用现有技术中默认的接入层(access layer，AS层)的设置信息，以使得第二终端解析该第一请求。
可选的，第一终端在确定第二终端支持D2D业务应用，也支持D2D业务应用对应的侧行链路切片，且确定接入网设备允许第一终端使用侧行链路切片后，向第二终端发送第一请求。
步骤702、第二终端接收第一请求，并向第一终端发送第一请求的响应。
其中，第二终端对第一请求中第二终端的标识信息进行识别，并确定第一请求的侧行链路切片在预先存储的签约的侧行链路切片或者允许的侧行链路切片中时，将第一请求的源二层地址作为目的二层地址，将第二终端的源二层地址作为源二层地址，作为第一请求的响应发送给第一终端，表明侧行链路建立成功。
步骤703、第一终端和第二终端将建立的侧行链路与侧行链路切片的对应关系进行保存。
其中，第一终端与第二终端将建立的侧行链路与侧行链路切片建立对应关系并进行保存，便于后续进行D2D业务应用的数据传输时，在D2D业务应用对应的侧行链路切片对应的侧行链路上，利用侧行链路切片的对应的物理传输资源进行数据传输。
当第一终端与第二终端利用上述图4、图5、图6和图7所述的方法建立侧行链路切片对应的侧行链路之后，第一终端与第二终端可以根据图8、图9或图10所示的方法确定侧行链路切片对应的物理传输资源，从而在侧行链路切片对应的侧行链路上，利用侧行链路切片对应的物理传输资源传输D2D业务应用的数据。
本申请实施例中以第一终端为例对终端获取侧行链路切片对应的物理传输资源的过程进行描述。
一种可能的设计中，当第一终端在网络覆盖范围内，且处于连接态时，第一终端可以利用图8所述方法获取侧行链路切片对应的物理传输资源，图8为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法，如图8所示，该方法包括：
步骤801、第一终端向接入网设备发送第四请求。
其中，第四请求包括侧行链路切片的标识信息；第四请求用于请求获取侧行链路切片对应的物理传输资源。
可选的，第四请求还包括侧行链路切片对应的业务应用的QoS需求信息。
步骤802、接入网设备接收第四请求，根据第四请求向第一终端发送第四请求的响应。
其中，第四请求的响应包括接入网设备为第一终端分配的侧行链路切片对应的物理传输资源。为第一终端分配的侧行链路切片对应的物理传输资源是从侧行链路切片的标识信息所对应的物理传输资源池中选择出来的。
可选的，接入网设备根据第一终端发送的业务应用的QoS需求信息为第一终端确定侧行链路切片对应的物理传输资源。
步骤803、第一终端接收第四请求的响应，根据第四请求的响应确定侧行链路切片对 应的物理传输资源。
需要说明的是，第一终端可以根据D2D业务应用，向接入网设备动态请求侧行链路切片对应的物理传输资源，即第一终端可以持续调度侧行链路切片对应的物理传输资源。
上述图8所述的方法是第一终端通过向接入网设备发送第四请求消息，以向接入网设备请求侧行链路切片对应的物理传输资源。
可替换的，第一终端可以将建立的侧行链路的相关信息上报给接入网设备，其中，侧行链路的相关信息包括侧行链路对应的侧行链路切片的标识信息；接入网设备接收到侧行链路的相关信息后，根据侧行链路切片的标识信息将该侧行链路切片对应的物理传输资源下发给第一终端。
另一种可能的设计中，当第一终端在网络覆盖范围内，且处于空闲态时，第一终端可以利用图9所述方法获取侧行链路切片对应的物理传输资源，图9为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法，如图9所示，该方法包括：
步骤901、接入网设备发送系统信息块SIB。
其中，SIB包括一个或多个侧行链路切片的标识信息与物理传输资源池的对应关系。
步骤902、第一终端接收SIB，根据SIB确定物理传输资源。
其中，系统信息块SIB中，一个或多个侧行链路切片的标识信息包括第一终端需要获取物理传输资源的侧行链路切片的标识信息；第一终端根据侧行链路切片的标识信息与物理传输资源池的对应关系，确定侧行链路切片对应的物理传输资源池，并根据D2D业务应用的传输需求从物理传输资源池中确定物理传输资源。可选的，第一终端可以保存接入网设备发送的侧行链路切片的标识信息与物理传输资源池的对应关系，当第一终端不在网络覆盖内时，可以根据预先保存的对应关系确定物理传输资源池，并根据D2D业务应用的传输需求从物理传输资源池中确定物理传输资源。
可替换的，接入网设备发送包括侧行链路切片的标识信息与物理传输资源的对应关系的广播消息，便于第一终端根据接入网设备的广播消息确定侧行链路切片对应的物理传输资源。另一种可能的设计中，当第一终端在网络覆盖范围内时，第一终端还可以利用图10所述方法获取侧行链路切片对应的物理传输资源，图10为本申请实施例提供的一种第一终端获取侧行链路切片对应的物理传输资源的方法，如图10所示，该方法包括：
步骤1001、第一终端向移动性管理网元发送第五请求。
其中，第五请求包括侧行链路切片的标识信息。
步骤1002、移动性管理网元接收第五请求，根据第五请求向策略控制网元发送第五请求。
其中，第五请求用于请求获取侧行链路切片对应的物理传输资源。
可选的，第一终端可以在向网络注册的过程中，将第五请求携带在注册请求中，以减少信令交互，也可以在需使用侧行链路切片对应的物理传输资源，向移动性管理网元发送第五请求，不予限制。
步骤1003、策略控制网元接收第五请求，根据第五请求向移动性管理网元发送第五请求的响应。
其中，第五请求的响应包括侧行链路切片的标识信息与物理传输资源池的对应关系。
步骤1004、移动性管理网元接收第五请求的响应，向第一终端发送第五请求的响应。
步骤1005、第一终端接收第五请求的响应，根据第五请求的响应确定物理传输资源。
其中，第一终端根据侧行链路切片的标识信息与物理传输资源池的对应关系，确定侧行链路切片对应的物理传输资源池，并根据D2D业务应用的传输需求从物理传输资源池中确定物理传输资源。
可选的，第一终端可以保存移动性管理网元发送的侧行链路切片的标识信息与物理传输资源池的对应关系，当第一终端不在网络覆盖内时，可以根据预先保存的对应关系确定物理传输资源池，并根据D2D业务应用的传输需求从物理传输资源池中确定物理传输资源。
可替换的，策略控制网元也可以直接通过移动性管理网元向第一终端发送侧行链路切片的标识信息与物理传输资源的对应关系，便于第一终端根据该对应关系确定侧行链路切片对应的物理传输资源。
需要说明的是，上述图8、图9和图10所述的侧行链路切片的标识信息与物理传输资源的对应关系，或者侧行链路切片的标识信息与物理传输资源池的对应关系可以是网络管理网元预先配置并保存在接入网设备或策略控制网元中；上述图9与图10所述的方法中，对于同一侧行链路切片，接入网设备确定的物理传输资源池与策略控制网元确定的物理传输资源池可以相同也可以不同，即接入网设备发送的侧行链路切片的标识信息与物理传输资源的对应关系与策略控制网元发送的侧行链路切片的标识信息与物理传输资源的对应关系可以相同也可以不同。
基于上述方法，第一终端可以在不同的连接管理状态下采用不同的方式获取侧行链路切片对应的物理传输资源，便于第一终端与第二终端在侧行链路，利用侧行链路切片对应的物理传输资源进行通信，实现利用侧行链路切片的方式在终端间进行D2D通信。
上述主要设备之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对网络节点进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图11示出了一种通信装置，通信装置110可以为第一终端或者第一终端中的芯片或者片上系统。该通信装置110可以用于执行上述实施例中涉及的第一终端的功能。图11所示通信装置110包括：处理模块1101。
处理模块1101，用于建立第一终端与第二终端之间的侧行链路，侧行链路与侧行链路切片对应；处理模块1101，还用于在侧行链路上，通过侧行链路切片对应的物理传输资源与第二终端进行通信。
其中，该通信装置110的具体实现方式可参考图3所述D2D通信方法中第一终端的行为功能。
一种可能的设计中，通信装置还包括收发模块1102，该收发模块1102，用于向第二终端发送包括侧行链路切片的标识信息的第一请求，第一请求用于建立侧行链路。
一种可能的设计中，收发模块1102，还用于根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，向第二终端发送第一请求；其中，侧行链路用于传输D2D业务应用的数据。
一种可能的设计中，上述收发模块1102，还用于向移动性管理网元发送包括第一终端的能力信息的第二请求；能力信息用于指示第一终端支持D2D通信；收发模块1102，用于接收来自移动性管理网元的包括D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系的第二请求的响应。
一种可能的设计中，收发模块1102，还用于若第一终端确定第二终端支持侧行链路切片，第一终端向第二终端发送第一请求。
一种可能的设计中，收发模块1102，还用于发送包括侧行链路切片的标识信息的广播消息；收发模块1102，还用于接收来自第二终端的用于指示第二终端支持侧行链路切片的广播消息的响应。
一种可能的设计中，收发模块1102，还用于若第一终端确定接入网设备允许使用侧行链路切片，第一终端向第二终端发送第一请求。
一种可能的设计中，收发模块1102，还用于向接入网设备发送包括侧行链路切片的标识信息的第三请求；收发模块1102，还用于接收来自接入网设备的用于指示允许使用侧行链路切片的第三请求的响应。
一种可能的设计中，处理模块1101，还用于确定物理传输资源。
一种可能的设计中，收发模块1102，还用于向接入网设备发送包括侧行链路切片的标识信息的第四请求；收发模块1102，还用于第一终端接收来自接入网设备的包括物理传输资源的第四请求的响应。
一种可能的设计中，收发模块1102，还用于接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源的对应关系的系统信息块(system information block，SIB)。
一种可能的设计中，收发模块1102，还用于接收来自接入网设备的包括侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB；处理模块1101，还用于根据物理传输资源池，确定物理传输资源。
一种可能的设计中，收发模块1102，还用于向移动性管理网元发送包括侧行链路切片的标识信息的第五请求；收发模块1102，还用于接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源池的对应关系的第五请求的响应；处理模块1101，还用于根据物理传输资源池，确定物理传输资源。
一种可能的设计中，收发模块1102，还用于发送包括侧行链路切片的标识信息的第五请求；收发模块1102，还用于接收来自移动性管理网元的包括侧行链路切片的标识信息与物理传输资源的对应关系的第五请求的响应。
作为又一种可实现方式，图11中的处理模块1101可以由处理器代替，收发模块1102可以由收发器代替，该处理器可以集成处理模块1101的功能，该收发器可以集成收发模 块1102的功能。进一步的，图11所示通信装置110还可以包括存储器。当处理模块1101由处理器代替，收发模块1102由收发器代替时，本申请实施例所涉及的通信装置110可以为图2所示通信装置。
图12示出了一种通信装置120的结构图，该通信装置120可以为第二终端或者第二终端中的芯片或者片上系统。该通信装置120可以用于执行上述实施例中涉及的第二终端的功能。图12所示通信装置120包括：收发模块1201。
收发模块1201，用于接收来自第一终端的包括侧行链路切片的标识信息的第一请求；第一请求用于建立第一终端和第二终端之间的侧行链路；侧行链路与侧行链路切片对应；
收发模块1201，用于向第一终端发送用于指示侧行链路建立成功的第一请求的响应。
其中，该通信装置120的具体实现方式可参考图5、图7所述D2D通信方法中第二终端的行为功能。
一种可能的设计中，上述收发模块1201，具体用于若第二终端具有使用侧行链路切片的权限，则第二终端向第一终端发送第一请求的响应。
一种可能的设计中，上述收发模块1201，还用于接收来自移动性管理网元的第二终端具有使用权限的一个或多个侧行链路切片的标识信息。
作为又一种可实现方式，图12中的收发模块1201可以由收发器代替，该收发器可以集成收发模块1201的功能。进一步的，图12所示通信装置120还可以包括存储器。当收发模块1201由收发器代替时，本申请实施例所涉及的通信装置120可以为图2所示通信装置。
图13示出了一种通信装置，通信装置130可以为接入网设备或者接入网设备中的芯片或者片上系统。该通信装置130可以用于执行上述实施例中涉及的接入网设备的功能。图13所示通信装置130包括：收发模块1301。
收发模块1301，用于向终端广播包括多个侧行链路切片的标识信息与物理传输资源池的对应关系的系统信息块SIB。
其中，该通信装置130的具体实现方式可参考图4、图6、图8、图9所述D2D通信方法中接入网设备的行为功能。
一种可能的设计中，收发模块1301用于接收来自终端的包括侧行链路切片的标识信息的第四请求，其中，上述一个或多个侧行链路切片的标识信息包括该侧行链路切片的标识信息；收发模块1301，还用于向终端发送包括侧行链路切片对应的物理传输资源的第四请求的响应。
一种可能的设计中，收发模块1301，还用于接收来自终端的包括侧行链路切片的标识信息的第三请求；收发模块1301，还用于向终端发送用于指示允许使用侧行链路切片的第三请求的响应。
一种可能的设计中，收发模块1301，具体用于若接入网设备确定侧行链路切片对应的已经建立的侧行链路的数量小于预设数量阈值，接入网设备向终端发送第三请求的响应，其中，预设数量阈值为侧行链路切片对应的侧行链路的数量的最大值。
一种可能的设计中，收发模块1301，具体用于若接入网设备验证终端具有使用侧行链路切片的权限，则向终端发送第三请求的响应。
一种可能的设计中，收发模块1301，具体还用于接收来自移动性管理网元的终端具有 使用权限的一个或多个侧行链路切片的标识信息。
一种可能的设计中，收发模块1301，具体用于若接入网设备支持侧行链路切片，则向终端发送第三请求的响应。
作为又一种可实现方式，图13中的收发模块1301可以由收发器代替，该收发器可以集成收发模块1301的功能。进一步的，图13所示通信装置130还可以包括存储器。当收发模块1301由收发器代替时，本申请实施例所涉及的通信装置130可以为图2所示通信装置。
本申请实施例还提供了一种计算机可读存储介质。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机可读存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。计算机可读存储介质可以是前述任一实施例的终端(包括数据发送端和/或数据接收端)的内部存储单元，例如终端的硬盘或内存。上述计算机可读存储介质也可以是上述终端的外部存储设备，例如上述终端上配备的插接式硬盘，智能存储卡(smart media card,SMC)，安全数字(secure digital,SD)卡，闪存卡(flash card)等。进一步地，上述计算机可读存储介质还可以既包括上述终端的内部存储单元也包括外部存储设备。上述计算机可读存储介质用于存储上述计算机程序以及上述终端所需的其他程序和数据。上述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
需要说明的是，本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显 示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (43)

  1. 一种设备到设备D2D通信方法，其特征在于，所述方法包括：
    第一终端建立所述第一终端与第二终端之间的侧行链路，所述侧行链路与侧行链路切片对应；
    所述第一终端在所述侧行链路上，通过所述侧行链路切片对应的物理传输资源与所述第二终端进行通信。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端建立所述第一终端与所述第二终端之间的所述侧行链路，包括：
    所述第一终端向所述第二终端发送第一请求，其中，所述第一请求包括所述侧行链路切片的标识信息，所述第一请求用于建立所述侧行链路。
  3. 根据权利要求2所述的方法，其特征在于，所述第一终端向所述第二终端发送第一请求，包括：
    所述第一终端根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，向所述第二终端发送所述第一请求，其中，所述侧行链路用于传输所述D2D业务应用的数据。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述第一终端向移动性管理网元发送第二请求，其中，所述第二请求包括所述第一终端的能力信息，所述能力信息用于指示所述第一终端支持D2D通信；
    所述第一终端接收来自所述移动性管理网元的所述第二请求的响应，其中，所述第二请求的响应包括D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系。
  5. 根据权利要求2-4任一项所述的方法，其特征在于，所述第一终端向所述第二终端发送第一请求，包括：
    若所述第一终端确定所述第二终端支持所述侧行链路切片，所述第一终端向所述第二终端发送所述第一请求。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一终端发送广播消息，其中，所述广播消息包括所述侧行链路切片的标识信息；
    所述第一终端接收来自所述第二终端的所述广播消息的响应，其中，所述广播消息的响应用于指示所述第二终端支持所述侧行链路切片。
  7. 根据权利要求2-6任一项所述的方法，其特征在于，所述第一终端向所述第二终端发送第一请求，包括：
    若所述第一终端确定接入网设备允许使用所述侧行链路切片，所述第一终端向所述第二终端发送第一请求。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述第一终端向所述接入网设备发送第三请求，其中，所述第三请求包括所述侧行链路切片的标识信息；
    所述第一终端接收来自所述接入网设备的所述第三请求的响应，其中，所述第三请求的响应用于指示允许使用所述侧行链路切片。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端确定所述物理传输资源。
  10. 根据权利要求9所述的方法，其特征在于，所述第一终端确定所述物理传输资源，包括：
    所述第一终端向接入网设备发送第四请求，其中，所述第四请求包括所述侧行链路切片的标识信息；
    所述第一终端接收来自所述接入网设备的所述第四请求的响应，其中，所述第四请求的响应包括所述物理传输资源。
  11. 根据权利要求9所述的方法，其特征在于，所述第一终端确定所述物理传输资源，包括：
    所述第一终端接收来自接入网设备的系统信息块SIB，其中，所述SIB包括所述侧行链路切片的标识信息与物理传输资源池的对应关系；
    所述第一终端根据所述物理传输资源池，确定所述物理传输资源。
  12. 根据权利要求9所述的方法，其特征在于，所述第一终端确定所述物理传输资源，包括：
    所述第一终端向移动性管理网元发送第五请求，其中，所述第五请求包括所述侧行链路切片的标识信息；
    所述第一终端接收来自所述移动性管理网元的所述第五请求的响应，其中，所述第五请求的响应包括所述侧行链路切片的标识信息与物理传输资源池的对应关系；
    所述第一终端根据所述物理传输资源池，确定所述物理传输资源。
  13. 一种设备到设备D2D通信方法，其特征在于，所述方法包括：
    第二终端接收来自第一终端的第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述第一终端和所述第二终端之间的侧行链路，所述侧行链路与所述侧行链路切片对应；
    所述第二终端向所述第一终端发送所述第一请求的响应，其中，所述第一请求的响应用于指示所述侧行链路建立成功。
  14. 根据权利要求13所述的方法，其特征在于，所述第二终端向所述第一终端发送所述第一请求的响应，包括：
    若所述第二终端具有使用所述侧行链路切片的使用权限，则所述第二终端向所述第一终端发送所述第一请求的响应。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述第二终端接收来自移动性管理网元的所述第二终端具有使用权限的一个或多个侧行链路切片的标识信息。
  16. 一种设备到设备D2D通信方法，其特征在于，包括：
    接入网设备向终端广播系统信息块SIB，其中，所述SIB包括一个或多个侧行链路切片的标识信息与物理传输资源池的对应关系。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收来自所述终端的第四请求，其中，所述第四请求包括侧行链路切片的标识信息，所述一个或多个侧行链路切片的标识信息包括所述侧行链路切片的标识信息；
    所述接入网设备向所述终端发送所述第四请求的响应，其中，所述第四请求的响应包 括所述侧行链路切片对应的物理传输资源。
  18. 根据权利要求16或17所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收来自终端的第三请求，其中，所述第三请求包括所述侧行链路切片的标识信息；
    所述接入网设备向所述终端发送所述第三请求的响应，其中，所述第三请求的响应用于指示允许使用所述侧行链路切片。
  19. 根据权利要求18所述的方法，其特征在于，所述接入网设备向所述终端发送所述第三请求的响应，包括：
    若所述接入网设备确定所述侧行链路切片对应的已经建立的侧行链路的数量小于预设数量阈值，所述接入网设备向所述终端发送所述第三请求的响应，其中，所述预设数量阈值为所述侧行链路切片对应的侧行链路的数量的最大值。
  20. 根据权利要求18所述的方法，其特征在于，所述接入网设备向所述终端发送所述第三请求的响应，包括：
    若所述接入网设备验证所述终端具有使用所述侧行链路切片的权限，则所述接入网设备向所述终端发送所述第三请求的响应。
  21. 根据权利要求20所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收来自移动性管理网元的所述终端具有使用权限的一个或多个侧行链路切片的标识信息。
  22. 根据权利要求18所述的方法，其特征在于，所述接入网设备向所述终端发送所述第三请求的响应，包括：
    若所述接入网设备支持所述侧行链路切片，则所述接入网设备向所述终端发送所述第三请求的响应。
  23. 一种通信装置，其特征在于，所述通信装置包括：
    处理模块，用于建立所述通信装置与第二终端之间的侧行链路，所述侧行链路与侧行链路切片对应；
    收发模块，用于在所述侧行链路上，通过所述侧行链路切片对应的物理传输资源与所述第二终端进行通信。
  24. 根据权利要求23所述的通信装置，其特征在于，所述收发模块，还用于向所述第二终端发送第一请求，其中，所述第一请求包括所述侧行链路切片的标识信息，所述第一请求用于建立所述侧行链路。
  25. 根据权利要求24所述的通信装置，其特征在于，所述收发模块，还用于根据D2D业务应用的标识信息与侧行链路切片的标识信息的对应关系，向所述第二终端发送所述第一请求，其中，所述侧行链路用于传输所述D2D业务应用的数据。
  26. 根据权利要求25所述的通信装置，其特征在于，所述收发模块，还用于向移动性管理网元发送第二请求，其中，所述第二请求包括所述通信装置的能力信息，所述能力信息用于指示所述通信装置支持D2D通信；
    所述收发模块，还用于接收来自所述移动性管理网元的所述第二请求的响应，其中，所述第二请求的响应包括D2D业务应用的标识信息和侧行链路切片的标识信息的对应关系。
  27. 根据权利要求24-26任一项所述的通信装置，其特征在于，所述收发模块，还用于若所述处理模块确定所述第二终端支持所述侧行链路切片，所述收发模块向所述第二终端发送所述第一请求。
  28. 根据权利要求27所述的通信装置，其特征在于，所述收发模块，还用于发送广播消息，其中，所述广播消息包括所述侧行链路切片的标识信息；
    所述收发模块，还用于接收来自所述第二终端的所述广播消息的响应，其中，所述广播消息的响应用于指示所述第二终端支持所述侧行链路切片。
  29. 根据权利要求24-28任一项所述的通信装置，其特征在于，所述收发模块，还用于若所述处理模块确定接入网设备允许使用所述侧行链路切片，所述收发模块向所述第二终端发送第一请求。
  30. 根据权利要求29所述的通信装置，其特征在于，所述收发模块，还用于向所述接入网设备发送第三请求，其中，所述第三请求包括所述侧行链路切片的标识信息；
    所述收发模块，还用于接收来自所述接入网设备的所述第三请求的响应，其中，所述第三请求的响应用于指示允许使用所述侧行链路切片。
  31. 根据权利要求23-30任一项所述的通信装置，其特征在于，所述处理模块确定所述物理传输资源。
  32. 根据权利要求31所述的通信装置，其特征在于，所述收发模块，还用于向接入网设备发送第四请求，其中，所述第四请求包括所述侧行链路切片的标识信息；
    所述收发模块，还用于接收来自所述接入网设备的所述第四请求的响应，其中，所述第四请求的响应包括所述物理传输资源。
  33. 根据权利要求31所述的通信装置，其特征在于，所述收发模块，还用于接收来自接入网设备的系统信息块SIB，其中，所述SIB包括所述侧行链路切片的标识信息与物理传输资源池的对应关系；
    所述处理模块，还用于根据所述物理传输资源池，确定所述物理传输资源。
  34. 根据权利要求31所述的通信装置，其特征在于，所述收发模块，还用于向移动性管理网元发送第五请求，其中，所述第五请求包括所述侧行链路切片的标识信息；
    所述收发模块，还用于接收来自所述移动性管理网元的所述第五请求的响应，其中，所述第五请求的响应包括所述侧行链路切片的标识信息与物理传输资源池的对应关系；
    所述处理模块，还用于根据所述物理传输资源池，确定所述物理传输资源。
  35. 一种通信装置，其特征在于，所述通信装置包括：
    收发模块，用于接收来自第一终端的第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述第一终端和所述通信装置之间的侧行链路，所述侧行链路与所述侧行链路切片对应；
    所述收发模块，还用于向所述第一终端发送所述第一请求的响应，其中，所述第一请求的响应用于指示所述侧行链路建立成功。
  36. 根据权利要求35所述的通信装置，其特征在于，所述收发模块，还用于若所述通信装置具有使用所述侧行链路切片的使用权限，则向所述第一终端发送所述第一请求的响应。
  37. 根据权利要求36所述的通信装置，其特征在于，所述收发模块，还用于接收来 自移动性管理网元的所述通信装置具有使用权限的一个或多个侧行链路切片的标识信息。
  38. 一种通信装置，其特征在于，所述通信装置包括一个或多个处理器、收发器；所述一个或多个处理器、所述收发器支持所述通信装置执行如权利要求1-12任一项所述的设备到设备D2D通信方法。
  39. 一种通信装置，其特征在于，所述通信装置包括一个或多个处理器、收发器；所述一个或多个处理器、所述收发器支持所述通信装置执行如权利要求13-15任一项所述的设备到设备D2D通信方法。
  40. 一种计算机可读存储介质，其特征在于，计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如权利要求1-12任一项所述的设备到设备D2D通信方法。
  41. 一种计算机可读存储介质，其特征在于，计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得计算机执行如权利要求13-15任一项所述的设备到设备D2D通信方法。
  42. 一种通信系统，其特征在于，通信系统包括：第一终端和第二终端；
    所述第一终端，用于向所述第二终端发送第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述侧行链路；所述第一终端建立所述第一终端与第二终端之间的侧行链路，所述侧行链路与侧行链路切片对应；所述第一终端在所述侧行链路上，通过所述侧行链路切片对应的物理传输资源与所述第二终端进行通信；
    所述第二终端，用于接收来自第一终端的第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述第一终端和所述第二终端之间的侧行链路；所述侧行链路与所述侧行链路切片对应；所述第二终端向所述第一终端发送所述第一请求的响应，其中，所述第一请求的响应用于指示所述侧行链路建立成功。
  43. 一种通信系统，其特征在于，通信系统包括：第一终端、第二终端和接入网设备；
    所述第一终端，用于向所述第二终端发送第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述侧行链路；所述第一终端建立所述第一终端与第二终端之间的侧行链路，所述侧行链路与侧行链路切片对应；所述第一终端在所述侧行链路上，通过所述侧行链路切片对应的物理传输资源与所述第二终端进行通信；
    所述第二终端，用于接收来自第一终端的第一请求，其中，所述第一请求包括侧行链路切片的标识信息，所述第一请求用于建立所述第一终端和所述第二终端之间的侧行链路；所述侧行链路与所述侧行链路切片对应；所述第二终端向所述第一终端发送所述第一请求的响应，其中，所述第一请求的响应用于指示所述侧行链路建立成功；
    所述接入网设备，用于向终端广播系统信息块SIB，其中，所述SIB包括多个侧行链路切片的标识信息与物理传输资源池的对应关系。
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