WO2021160072A1 - 一种直连链路建立方法及相关设备 - Google Patents

一种直连链路建立方法及相关设备 Download PDF

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Publication number
WO2021160072A1
WO2021160072A1 PCT/CN2021/075878 CN2021075878W WO2021160072A1 WO 2021160072 A1 WO2021160072 A1 WO 2021160072A1 CN 2021075878 W CN2021075878 W CN 2021075878W WO 2021160072 A1 WO2021160072 A1 WO 2021160072A1
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WIPO (PCT)
Prior art keywords
terminal device
access network
information
network device
direct link
Prior art date
Application number
PCT/CN2021/075878
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English (en)
French (fr)
Inventor
徐敏
刘星
Original Assignee
展讯通信（上海）有限公司
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Publication date
Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to US17/799,038 priority Critical patent/US20230084482A1/en
Priority to EP21753809.9A priority patent/EP4106481A4/en
Publication of WO2021160072A1 publication Critical patent/WO2021160072A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of communication technology, and in particular to a method for establishing a direct link and related equipment.
  • V2X communication includes vehicle to vehicle (V2V) communication, vehicle to roadside infrastructure (Vehicle to Infrastructure, V2I) communication, and vehicle to pedestrian (Vehicle to Pedestrian, V2P) communication.
  • V2X applications will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and in-vehicle entertainment information.
  • the V2X communication method can also be applied to other user terminal communication methods, such as in any ProSe (Proximtiy-based Services, proximity service) scenario, rather than limited to car communication related fields.
  • V2V communication is a communication method different from ordinary wireless cellular network communication.
  • terminal equipment and terminal equipment are based on Uu interfaces and communicate through base stations and core networks; and
  • terminal devices can communicate directly based on the PC5 interface.
  • the link used for direct communication between the terminal device and the terminal device is a direct link (Sidelink, SL, also known as a secondary link, a secondary link, a side link, or a side link, etc.). Due to the limited transmission power of the terminal equipment, the transmission range of the terminal equipment is limited. If the terminal equipment exceeds the corresponding transmission range, the direct link cannot be used for transmission. It is necessary to establish a Uu link with the base station for communication and data transmission.
  • a terminal device Before a terminal device establishes a direct link, it needs to perform a direct link discovery process (Sidelink Discovery), which is used to discover the terminal device at the opposite end and transmit the necessary information for establishing a direct link.
  • the user terminal mainly selects different transmission paths according to the strategy configured by the core network equipment. For example, when the terminal equipment switches to a certain cell, or the current terminal equipment based on the Uu interface link cannot meet the specified requirements for data transmission, based on the access network
  • the wireless resources allocated by the device execute the direct link discovery process.
  • the direct link of the terminal device After the direct link of the terminal device is successfully established, it will initiate a request to the core network node or the core network node to trigger the deletion of the Uu path data transmission link, and the base station does not participate in triggering the direct link Road creation and deletion process.
  • the terminal device at the opposite end since it is impossible to know the real-time and precise location of the terminal device that needs to establish a direct link, the terminal device at the opposite end is not within the transmission range of the establishment of the direct link, so that the terminal device at the local end cannot receive the response from the terminal device at the opposite end. , And the continuous discovery process of the direct link will cause the local terminal equipment to consume a lot of power and cause a waste of wireless resources.
  • This application provides a method for establishing a direct link and related equipment, through which the power of terminal equipment and wireless network resources can be saved.
  • the first aspect of the embodiments of the present application provides a method for transferring service data, including:
  • the first access network device sends first indication information to the first terminal device; the first indication information is used to instruct the first terminal device to trigger the process of establishing a direct link.
  • the sending of the first indication information by the first access network device to the first terminal device includes:
  • the first access network device sends the first indication information to the first terminal device according to the terminal location information of the first terminal device.
  • the first access network device acquiring terminal location information of the first terminal device includes:
  • the first access network device acquires the GPS information of the first terminal device, the location unit identifier of the first terminal device, the power reference signal of the first terminal device, or the beam of the first terminal device One or two of the messages.
  • the method further includes:
  • the sending, by the first access network device, the first indication information to the first terminal device includes:
  • the first access network device sends the first indication information to the first terminal device according to the first direct link information.
  • the first continuous link information includes a temporary mobile subscriber identity code TMSI, a wireless network temporary identity RNTI, an international mobile subscriber identity code IMSI, a flow identifier flow ID, a data radio bearer identifier DRB ID, and a destination identifier destination ID , Or one or more of source IDs.
  • the first indication information carries one or more of flow ID, data radio bearer ID DRB ID, destination ID, or source ID
  • the first indication information is used to instruct the first terminal device to trigger a process of establishing a direct link with the second terminal device;
  • the method also includes:
  • the second access network device is an access network device to which the second terminal device is connected;
  • the sending, by the first access network device, the first indication information to the first terminal device according to the terminal location information of the first terminal device includes:
  • the first access network device sends the first indication information to the first terminal device according to the terminal location information of the first terminal device and the terminal location information of the second terminal device.
  • the first indication information carries a first time gap identifier and/or a first resource identifier
  • the first time gap identifier is used to indicate the time gap in the process of establishing a direct link by the first terminal device
  • the first resource identifier is used to indicate a radio resource of the process of establishing a direct link by the first terminal device.
  • the first indication information is one of a radio resource control RRC message, medium access control element MAC CE information, or downlink control information DCI.
  • the method further includes:
  • the first access network device sends the first direct link information to a third access network device; the third access network device is an access network device to which the first terminal device switches connections.
  • the second aspect of the present application provides a method for establishing a direct link, including:
  • the first terminal device receives the first indication information sent by the first access network device
  • the first terminal device triggers a process of establishing a direct link according to the first indication information.
  • the method further includes:
  • the first terminal device sends the terminal location information of the first terminal device to the first access network device.
  • the terminal location information of the first terminal device includes the GPS information of the first terminal device, the location unit identifier of the first terminal device, the power reference signal of the first terminal device, or the One or two of the beam information of the target terminal device.
  • the first indication information is sent by the first access network device according to the first direct link information
  • the method further includes:
  • the first terminal device sends the first direct link information to the first access network device.
  • the first direct link information includes a temporary mobile subscriber identity code TMSI, a wireless network temporary identity RNTI, an international mobile subscriber identity code IMSI, a flow identity flow ID, a data radio bearer identity DRB ID, a destination ID, Or one or more of source IDs.
  • the first indication information carries one or more of flow ID, data radio bearer ID DRB, destination ID, or source ID.
  • the first indication information carries a first time gap identifier and/or a first resource identifier
  • the first time gap identifier is used to indicate the time gap in the process of establishing a direct link by the first terminal device
  • the first resource identifier is used to indicate a radio resource of the process of establishing a direct link by the first terminal device.
  • the first indication information is one of a radio resource control RRC message, medium access control element MAC CE information, or downlink control information DCI.
  • the third aspect of the present application provides a first access network device, including:
  • the instruction information sending module is configured to send first instruction information to the first terminal device; the first instruction information is used to instruct the first terminal device to trigger the process of establishing a direct link.
  • the fourth aspect of the present application provides a first terminal device, including:
  • An instruction information receiving module configured to receive the first instruction information sent by the first access network device
  • the triggering module is configured to trigger the process of establishing a direct link according to the first indication information.
  • a fifth aspect of the present application provides a communication network device, including: a processor and a memory;
  • the processor is connected to a memory, where the memory is used to store program code, and the processor is used to call the program code to execute the method in any one of the foregoing aspects in the embodiments of the present application.
  • a sixth aspect of the embodiments of the present application provides a computer storage medium, the computer storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the method in any of the above aspects.
  • the seventh aspect of the embodiments of the present application provides a computer program product
  • the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the first aspect and any one of its possible implementation manners In the method.
  • the first access network device sends first indication information to the first terminal device, where the first indication information is used to instruct the first terminal device to trigger the establishment of a direct link process.
  • the first terminal device to trigger the establishment of a direct link process under the trigger of the first indication information, without continuously sending a request message for establishing a direct link, thereby saving the power and wireless resources of the first terminal device.
  • FIG. 1 is a schematic structural diagram of a direct link establishment system provided by an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a method for establishing a direct link according to an embodiment of the present application
  • FIG. 3 is a schematic flowchart of another method for establishing a direct link provided by an embodiment of the present application
  • FIG. 4 is a schematic flowchart of another method for establishing a direct link provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a first access network device according to an application embodiment
  • FIG. 6 is a schematic structural diagram of a first terminal device provided by an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a communication network device provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of the architecture of a direct link establishment system provided by an embodiment of the present application.
  • the system may include a first access network device 001, The first terminal device 002 and the second terminal device 003.
  • the first terminal device 002 is a terminal device in the cell of the first access network device 001
  • the second terminal device 003 may be a terminal device in the cell of the first access network device 001 or a terminal device in another cell.
  • the method for establishing a direct link provided by the embodiment of the present application may be implemented based on the system architecture shown in FIG. 1.
  • the first access network device 001 may send first instruction information to the first terminal device 002, and the first instruction information may instruct the first terminal device 001 to trigger the process of establishing a direct link with the second user terminal 002.
  • the above-mentioned system may be a 5G (5Generation) communication system, and may also be applicable to 4G and 3G communication systems, and may also be a variety of new communication systems in the future, such as 6G and 7G.
  • the above system is applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, Vehicle-to-Everything (vehicle-to-everything communication) architecture and other architectures.
  • the first access network device 001 may include various forms of network devices, such as: a macro base station, a micro base station (also referred to as a small station), a relay station, an access point, a cell, and so on.
  • the above-mentioned base station may be a device that provides base station functions in a 2G network, including a base transceiver station (English: base transceiver station, referred to as BTS), may be a device that provides base station functions in a 3G network, including NodeB, which may be in 4G
  • the equipment that provides the base station function in the network includes an evolved NodeB (eNB), which can be in wireless local area networks (WLAN), and the equipment that provides the base station function is an access point (access point, abbreviated as WLAN).
  • eNB evolved NodeB
  • WLAN wireless local area networks
  • AP it can also be the gNB that provides base station functions in 5G New Radio (NR), and the evolving Node B (ng-eNB), where the NR technology is used for communication between the gNB and the terminal, ng -E-UTRA (Evolved Universal Terrestrial Radio Access) technology is used for communication between eNB and terminal.
  • NR 5G New Radio
  • ng-eNB the evolving Node B
  • ng -E-UTRA Evolved Universal Terrestrial Radio Access
  • Both gNB and ng-eNB can be connected to the 5G core network, and it can also be equipment that provides base station functions in new communication systems in the future, etc. .
  • the base station may also be a transmission receive point (TRP), a central unit (CU), or other network entities.
  • TRP transmission receive point
  • CU central unit
  • the first access network device 001 may be a baseband processing unit (BBU) and a remote radio unit (RRU), in the cloud radio access network (cloud radio access network, In the CRAN scenario, it can be the baseband pool BBU pool and the radio unit RRU.
  • the first access network device 001 may also be a mobility management entity (MME) device, an access and mobility management function (AMF) device, and a car networking control function (control function, CF) equipment, gateway (GateWay), roadside unit (RSU), operation management and maintenance (operation administration and maintenance, OAM) equipment, application server (APP server) or third-party network elements.
  • MME mobility management entity
  • AMF access and mobility management function
  • CF car networking control function
  • gateway Gateway
  • RSU roadside unit
  • OAM operation management and maintenance
  • OAM application server
  • third-party network elements third-party network elements.
  • the terminal device (including the first terminal device 002 and the second terminal device 003) can also be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, terminal device, mobile device, User terminal, wireless network equipment, user agent, gateway equipment or user device, etc.
  • the terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication function Handheld devices, computing devices or other devices connected to wireless modems, in-vehicle devices, wearable devices or the Internet of Things, terminal devices in vehicle networks, and terminal devices of any form in future networks, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the first access network device 001 and the first terminal device 002 may establish a connection based on the uplink and the downlink.
  • the embodiment of the present application defines the one-way communication link from the access network device to the terminal device as the downlink, and the one-way communication link from the terminal device to the access network device as the uplink.
  • FIG. 2 is a schematic flowchart of a method for establishing a direct link provided by an embodiment of the present application. As shown in FIG. 2, the method can Including steps S201-S202.
  • a first access network device sends first indication information to a first terminal device; the first indication information is used to instruct the first terminal device to trigger a process of establishing a direct link.
  • the first access network device may be configured with connection information related to the first terminal device.
  • the information includes the first direct link information, and the first direct link information may indicate the establishment of the connection with the first terminal device.
  • the identifier of the terminal device at the opposite end of the direct link (denoted as the second terminal device) and/or the identifier indicating the service between the second terminal device that establishes the direct link with the first terminal device, etc., which may include
  • the first terminal device establishes the relevant information of one or more terminal devices of the opposite end of the direct link.
  • the first direct link information may also indicate information related to one or more direct links that the first terminal device needs to establish, such as quality of service (QoS) demand parameters, proximity service types, and so on.
  • QoS quality of service
  • the first direct link information may be configured by the first terminal device to the first access network device.
  • the first direct link information may be the core network device's configuration to the first access network device. Sent by the connected device.
  • the first direct link information may include the TMSI (Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity) of the second terminal device, IMSI (International Mobile Subscriber Identity, International Mobile Subscriber Identity), and the RNTI (Temporary Mobile Subscriber Identity) of the second terminal device.
  • Radio Network Temporary Identity, wireless network temporary identity the flow ID (service flow identifier) of the direct link service that the first terminal device needs to establish, the DRB (Data Radio Bearer, data radio bearer) ID, the first terminal device and the second One or more of the destination ID (destination ID) and source ID (source ID) of the service of the direct link between terminal devices.
  • the RNTI may be a C-RNTI (Cell RNTI, Cell Radio Network Temporary Identity) or other RNTI that identifies terminal equipment.
  • the first access network device can determine the core network device or the second terminal device configured by the first terminal device that needs to establish a direct link with the first terminal device according to TMSI, IMSI, or RNTI; it can use flow ID, DRB ID, One or more of destination ID and source ID determine the identifier of the service information carried by the first terminal device that needs to establish a direct link.
  • the first access network device stores the above-mentioned first direct link information, and based on the above-mentioned first direct link information, detects whether it is necessary to send an instruction to the first terminal device to trigger the establishment when certain conditions are met.
  • the first indication information of the direct link process is not limited to the above-mentioned direct link information.
  • the first access network device may obtain the terminal location information of the first terminal device, and determine whether the first terminal device meets the conditions for triggering the process of establishing the direct link based on the terminal location information of the first terminal device.
  • the terminal location information of the first terminal device may be GPS (Global Positioning System) information reported by the first terminal device to the first access network device, and the first access network device may The GPS information of the device determines the location of the first terminal device; it can be the location unit ID (zone ID) of the first terminal device.
  • the network can divide the physical location into different groups in advance, and each group has a unique corresponding zone ID.
  • the first terminal device can report the zone ID corresponding to the group to which it belongs as the location unit identifier of the first terminal device to the first access network device, and the first access network device can determine where the first terminal device is located according to the zone ID
  • the geographic location range can also be the power reference signal and beam information of the first terminal device
  • the power parameter signal can be the RSRP (Reference Signal Receiving Power, reference signal received power) of the first terminal device
  • the beam information can be the first terminal device Information about the beam (beam) used by the device to interact with the base station.
  • the first access network device can determine the azimuth angle of the first terminal device relative to the first access network device according to the beam information used by the first terminal device, And according to the RSRP of the first terminal device, the distance between the first terminal device and the first access network device is determined, and then the position of the first terminal device is determined according to the above-mentioned azimuth angle and distance. Further, the first access network device can obtain terminal location information of the second terminal device that needs to establish a direct link with the first terminal device, determine the location of the second terminal device, and determine the two terminals in combination with the location of the first terminal device To determine whether the two terminal devices can establish a direct link.
  • the first access network device After the first access network device determines that the first terminal device meets the conditions for triggering the process of establishing a direct link according to the terminal location information of the first terminal device, the first access network device sends first indication information to the first terminal device for indicating the first terminal device.
  • a terminal device triggers the process of establishing a direct link.
  • the first indication information may be RRC (Radio Resource Control, radio resource control) message, MAC (Media Access Control, media access control) CE (Control Element) information, or DCI (Downlink Control Information, downlink control information) ).
  • the first terminal device triggers a process of establishing a direct link according to the first indication information.
  • the first terminal device After receiving the first indication information, the first terminal device triggers the process of establishing a direct link and starts the discovery process of the direct link.
  • the discovery message of the direct link is broadcast in the first time gap (gap) designated by the access network device.
  • the first terminal device may send a SL UE information (secondary link user information) message to the first access network device to request
  • the base station allocates and sends the radio resources and/or gap information required by the discovery process.
  • the base station will be the first terminal according to the RF (Radio Frequency) capability parameters and discovery performance (direct link discovery performance requirements) parameters of the first terminal device
  • the device allocates radio resources and/or the first time gap.
  • the allocated radio resources and the designated first time gap of the first terminal device may be configured by the first access network device for the first terminal device before the first indication information is received.
  • the first indication information activates the first terminal device to use the allocated radio resources, and triggers the direct link discovery process according to the specified first time interval; in another optional manner, the first terminal device is allocated radio resources It may be that the first access network device is configured for the first terminal device before receiving the first indication information, and the first time gap may be indicated by the first time gap identifier included in the first indication information, that the first terminal device After receiving the first indication information, use the wireless resources configured by the first access network device to trigger the direct link discovery process according to the first time gap indicated by the first time gap identifier in the first indication information;
  • the first time gap may be the radio resource identifier to which the first terminal device is configured by the first access network device for the first terminal device before the first terminal device receives the first indication information , Can be indicated by the first resource identifier carried in the first indication information.
  • the first terminal device After receiving the first indication information, the first terminal device uses the radio resource indicated by the first resource identifier carried in the first indication information according to the access network
  • the time gap configured by the device triggers the direct link discovery process; in another optional manner, the first time gap identifier corresponding to the first time gap, and the first resource identifier corresponding to the wireless resource allocated by the first terminal device , Can be included in the first instruction information, and configured to the first terminal device through the first instruction information.
  • the first terminal device After receiving the first instruction information, uses the first resource identifier corresponding to the first instruction information carried The wireless resource triggers the direct link discovery process according to the first time gap indicated by the first time gap identifier included in the first indication information.
  • the first indication information may also carry one or more of flow ID, DRB ID, destination ID, or source ID.
  • the foregoing information may be included by the first access network device according to the first direct link information.
  • the information corresponds to what is written in the first instruction information.
  • the first terminal device can determine which service or services are transmitted to establish the direct link according to one or more of the above information, and determine the direct link that needs to be triggered to establish the direct link, and then after the direct link is established, through The direct link transmits the data of the service.
  • the first access network device sends first indication information to the first terminal device, and the first terminal device triggers the process of establishing a direct link according to the first indication information.
  • the first terminal device triggers the establishment of a direct link process under the trigger of the first indication information, without continuously sending a request message for establishing a direct link, thereby saving the power and wireless resources of the first terminal device.
  • Fig. 3 is a schematic flowchart of another method for establishing a direct link provided by an embodiment of the present application. As shown in the figure, the method may include steps S301-S302.
  • the first access network device obtains terminal location information of the first terminal device and terminal location information of the second terminal device.
  • the first terminal device is a terminal device in a cell of the first access network device
  • the first access network device can use the GPS information of the first terminal device, or the location unit identification of the first terminal device, or the first terminal device
  • the power reference signal and beam information are used to determine the terminal position information of the first terminal device.
  • the first access network device may obtain the terminal location information of the second terminal device in a manner of obtaining the terminal location information of the first terminal device ; In the case that the second terminal device is not a terminal device in the cell of the first access network device, the first access network device may receive the terminal location information of the second terminal device sent by the second access network device, where the first The second access network device is the access network device corresponding to the cell where the second terminal device is located. In an implementation manner, the second access network device may obtain the terminal location information of the second terminal device in a manner in which the first access network device obtains the terminal location information of the first terminal device, and then send it to the first access network device. Network access equipment.
  • the first access network device may send information about the second terminal device to the second access network device according to the identifier of the second terminal device.
  • the terminal location request information of the terminal device, and the second access network device, after receiving the terminal location request information, can send the terminal location information of the second terminal device to the first access network device according to the terminal location request information.
  • the first access network device sends first indication information to the first terminal device according to the terminal location information of the first terminal device and the terminal location information of the second terminal device.
  • the first access network device may determine the distance between the first terminal device and the second terminal device based on the terminal location information of the first terminal device and the terminal location information of the second terminal device, and then determine whether the two are Whether the distance between the two meets the distance condition for establishing a direct link, and when it is determined to be satisfied, the first instruction information is sent to the first terminal device to ensure that the first instruction information is the distance between the first terminal device and the second terminal device.
  • the first terminal device is triggered to trigger the process of establishing a direct link.
  • the first access network device calculates the distance between the two terminal devices based on the GPS location information of the first terminal device and the second terminal device; or the first access network device calculates the distance between the first terminal device and the second terminal device based on the zone of the first terminal device and the second terminal device. ID, to determine whether the two terminal devices are in the same area or adjacent areas; or the first access network device determines whether the two terminal devices are in the same area according to the beam information and signal strength used by the first terminal device and the second terminal device The beam direction is used to determine the distance between the two terminal devices based on the signal strength, so as to determine whether the two terminal devices can communicate directly.
  • the first access network device may send the second indication information to the second terminal device according to the terminal location information of the first terminal device and the terminal location information of the second terminal device; in another optional manner, If the first terminal device is in the cell of the second access network device, the first access network device may send the second indication information to the second terminal device through the second access network device.
  • the foregoing second indication information is used to instruct the second terminal device to trigger the process of establishing a direct link.
  • the first access network device sends the first indication information to the first terminal device according to the terminal location information of the first terminal device and the terminal location information of the second terminal device, so that the first terminal device is in the first terminal device.
  • the process of establishing a direct link is triggered, and there is no need to continuously send a request message for establishing a direct link, thereby saving the first terminal device’s Power and wireless resources.
  • FIG. 4 is a schematic flowchart of another method for establishing a direct link provided by an embodiment of the present application. As shown in the figure, the method may include steps S401-S404.
  • S401 The first access network device receives first direct link information.
  • the first direct link information may be sent by the first terminal device to the first access network device, or sent by the core network device to the first access network device, or sent by other access network devices.
  • the other access network devices here are the access network devices that the first access network device is connected to before switching to the cell of the first access network device.
  • the first direct link information may include one or more of TMSI, IMSI, RNTI, flow ID, DRB ID, destination ID, and source ID.
  • the first access network device can determine the opposite terminal device that needs to establish a direct link with the first terminal device according to TMSI, IMSI, or RNTI; it can determine the first terminal device through flow ID, DRB ID, destination ID, or source ID.
  • a terminal device needs to establish the information of the direct link and the identification of the service information carried by the direct link.
  • the first access network device obtains terminal location information of the first terminal device according to the first direct link information.
  • the first access network device may determine the terminal location information of the first terminal device through the GPS information of the first terminal device, or the location unit identifier of the first terminal device, or the power reference signal and beam information of the first terminal device.
  • the first access network device sends first indication information to the first terminal device according to the terminal location information of the first terminal device.
  • the first indication information is used to instruct the first terminal device to trigger the process of establishing a direct link.
  • the first terminal device After receiving the first indication information, the first terminal device broadcasts the discovery message of the direct link based on the wireless resources allocated by the first access network device and the first time gap.
  • the first terminal device is a terminal device located in the cell of the first access network device. After step S403, the first terminal device can move and switch to the cell range of the third access network device. Inside.
  • S404 The first access network device sends the first direct link information to the third access network device.
  • the first access network device can send the first direct link information to the third access network device, and the third access network device can obtain The terminal location information of the first access network device, and based on the terminal location information of the first access network device and/or the terminal location information of the second terminal device, send to the first terminal device an instruction to trigger the process of establishing a direct link information.
  • the terminal location information of the first terminal device is obtained according to the first direct link information
  • the terminal location information of the first terminal device is obtained according to the terminal position information of the first terminal device.
  • the location information sends first indication information to the first terminal device that instructs the first terminal device to trigger the establishment of a direct link process.
  • the first access device sends the first indication information to the first terminal device according to the terminal location information of the first terminal device without continuously sending the request message for establishing a direct link, and the first terminal device switches to the third access network After the cell of the device, the first access network device sends the first direct link information to the third access network device, so that after the cell is switched, there is no need to continuously send a request message for establishing a direct link, saving the first terminal device Power and wireless resources.
  • Figure 5 is a schematic structural diagram of a first access network device provided by an application embodiment.
  • the terminal device sends first indication information; the first indication information is used to instruct the first terminal device to trigger the establishment of a direct link procedure.
  • the first access network device 50 can execute each step performed by the first access network device in the direct link establishment method shown in FIGS. 2 to 4 through its built-in functional modules.
  • the specific implementation details can be Refer to the implementation details of each step in the embodiment corresponding to FIG. 2 to FIG. 4, which will not be repeated here.
  • the first instruction information is sent to the first terminal device through the first instruction information sending module, and the first instruction information is used to instruct the first terminal device to trigger the establishment of a direct link process.
  • This allows the first terminal device to trigger the establishment of a direct link process under the trigger of the first indication information, without continuously sending a request message for establishing a direct link, thereby saving the power and wireless resources of the first terminal device.
  • the first access network device 50 shown in FIG. 5 may be the first access network device 001 shown in FIG. 1, such as a base station, or a part of the first access network device 001. Such as part of the base station.
  • the first access network device 50 shown in FIG. 5 may be a chip, a chip module, a chip system, or a part of a chip.
  • modules included in the first access network device 50 described in the foregoing embodiment may be software modules, hardware modules, or part of software modules and part of hardware modules.
  • the modules contained therein can be implemented in hardware such as circuits, or at least some of the modules can be implemented in a software program that runs inside the chip.
  • the remaining (if any) part of the module can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, each module contained in it can be implemented by hardware such as circuits
  • Different modules can be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least part of the modules can be implemented in the form of a software program that runs in the integrated processing of the chip module
  • the remaining (if any) part of the modules can be implemented in hardware such as circuits; for various devices and products that are applied or integrated in the terminal, each module contained in it can be implemented in hardware such as circuits, and different modules can be implemented Located in the same component (for example, chip, circuit module, etc.) or different components in the terminal, or at least part of the modules can be implemented in the form of a software program that runs on the processor integrated inside the terminal, and the rest (if any) Some modules can be implemented in hardware such as circuits.
  • FIG. 6 is a schematic structural diagram of a first terminal device according to an embodiment of the present application.
  • the first terminal device 60 includes an indication information receiving module 601 and a triggering module 602, in which:
  • the instruction information receiving module 601 is configured to receive the first instruction information sent by the first access network device;
  • the trigger module 602 is configured to trigger the process of establishing a direct link according to the first indication information.
  • the first terminal device 60 can execute each step performed by the first terminal device in the direct link establishment method shown in Figures 2 to 4 through its built-in functional modules.
  • the first terminal device 60 can execute each step performed by the first terminal device in the direct link establishment method shown in Figures 2 to 4 through its built-in functional modules.
  • Figure 2 The implementation details of each step in the embodiment corresponding to FIG. 4 will not be repeated here.
  • the trigger module triggers the process of establishing a direct link according to the first instruction information, and the first terminal device is in the first Under the trigger of the indication information, the process of establishing the direct link is triggered, and there is no need to continuously send the request message for establishing the direct link, thereby saving the power and wireless resources of the first terminal device.
  • the first terminal device 60 shown in FIG. 6 may be the first terminal device 002 shown in FIG. 1, such as a mobile phone, a mobile station, etc., or a part of the first terminal device 002, such as a mobile phone. a part of.
  • the first terminal device 60 shown in FIG. 6 may be a chip, a chip module, a chip system, or a part of a chip.
  • modules included in the first terminal device 60 may be software modules, hardware modules, or part of software modules and part of hardware modules.
  • the modules contained therein can be implemented in hardware such as circuits, or at least some of the modules can be implemented in a software program that runs inside the chip.
  • the remaining (if any) part of the module can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, each module contained in it can be implemented by hardware such as circuits
  • Different modules can be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least part of the modules can be implemented in the form of a software program that runs in the integrated processing of the chip module
  • the remaining (if any) part of the modules can be implemented in hardware such as circuits; for various devices and products that are applied or integrated in the terminal, each module contained in it can be implemented in hardware such as circuits, and different modules can be implemented Located in the same component (for example, chip, circuit module, etc.) or different components in the terminal, or at least part of the modules can be implemented in the form of a software program that runs on the processor integrated inside the terminal, and the rest (if any) Some modules can be implemented in hardware such as circuits.
  • the communication network device 70 may include: a processor 701, a communication interface 702, and a memory 703; for example, the processor 701, the communication interface 702, and the memory 703 are coupled through a bus 704.
  • the memory 703 may include, but is not limited to, random access memory (RAM), erasable programmable read-only memory (Erasable Programmable ROM, EPROM), read-only memory (Read-Only Memory ROM), or portable read-only memory (Compact Disc Read-Only Memory, CD-ROM) etc.
  • RAM random access memory
  • EPROM erasable programmable read-only memory
  • Read-Only Memory ROM read-only memory
  • portable read-only memory Compact Disc Read-Only Memory, CD-ROM
  • the processor 701 may be one or more central processing units (CPU).
  • CPU central processing units
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 701 is configured to read the program code stored in the memory 703, and cooperate with the communication interface 702 to execute part or all of the steps of the method executed by the communication network device 70 in the foregoing embodiment of the present application.
  • the communication network device 70 can be applied to the first access network device 001 in the embodiment corresponding to FIG. 1.
  • the communication interface 702 is mainly used for connection A terminal device or other access network device; and the processor 701 may be used to call a device control application program stored in the memory 703 to realize:
  • the first indication information is used to instruct the first terminal device to trigger the establishment of a direct link procedure.
  • the communication network device 70 may be applied to the first terminal device 002 in the embodiment corresponding to FIG. 1.
  • the communication interface 702 is mainly used for connecting Network access devices or establish direct links with other terminal devices; and the processor 701 can be used to call the device control application stored in the memory 703 to achieve:
  • the process of establishing a direct link is triggered.
  • the communication network device 70 described in the embodiment of the present application can perform the description of the direct link establishment method in the foregoing embodiment corresponding to FIG. 2 to FIG. 4, and may also perform the foregoing embodiment corresponding to FIG. 5
  • the description of the first access network device 50 in the first access network device 50 or the first mobile terminal 60 in the embodiment corresponding to FIG. 6 will not be repeated here.
  • the description of the beneficial effects of using the same method will not be repeated.
  • the embodiments of the present application also provide a computer storage medium, and the computer storage medium stores the aforementioned computer program executed by the communication network device 70, and the computer program includes The program instructions, when the processor executes the program instructions, can execute the description of the direct link establishment method in the foregoing embodiment corresponding to FIG. 2 to FIG. In addition, the description of the beneficial effects of using the same method will not be repeated.
  • the description of the beneficial effects of using the same method will not be repeated.
  • An embodiment of the present application also provides a computer program product.
  • the computer product When the computer product is run by a communication network device, it can execute the direct link establishment method designed for the communication network device 70 in the embodiment shown in FIG. 7.
  • the program can be stored in a computer readable storage medium. During execution, it may include the procedures of the above-mentioned method embodiments.
  • the storage medium may be a magnetic disk, an optical disc, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM), etc.

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Abstract

本申请实施例公开了一种直连链路建立方法及相关设备，所述方法包括：第一接入网设备向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。通过本申请可以节约终端设备的电量以及无线网络资源。

Description

一种直连链路建立方法及相关设备
本申请要求于2020年02月11日提交中国专利局、申请号为202010087803.0、申请名称为“一种直连链路建立方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种直连链路建立方法及相关设备。
背景技术
车与外界的信息交换(Vehicle to X，简称V2X，也可称为vehicle to everything)是未来智能交通运输系统的关键技术，主要研究基于第三代合作伙伴项目(the 3rd Generation Partnership Project，简称3GPP)通信协议的车辆数据传输方案。V2X通信包括车与车(Vehicle to Vehicle，简称V2V)通信、车与路侧基础设施(Vehicle to Infrastructure，简称V2I)通信以及车与行人(Vehicle to Pedestrian，简称V2P)通信。V2X应用将改善驾驶安全性、减少拥堵和车辆能耗、提高交通效率和车载娱乐信息等。同时V2X通信方式也可应用于其他用户终端通信方式，比如在任何ProSe(Proximtiy–based Services，邻近服务)场景中，而非限于车通信相关领域。
在V2X通信中，V2V通信是一种和普通无线蜂窝网络通信不一样的通信方式，在传统的蜂窝网络中，终端设备和终端设备之间基于Uu接口，通过基站和核心网等进行通信；而在V2V通信中，终端设备之间可以基于PC5接口，直接进行通信。终端设备和终端设备之间直接进行通信所使用的链路是直连链路(Sidelink，SL，又称为辅链路、副链路、侧链路或边链路等)。由于终端设备的发射功率有限，导致终端设备传输范围的有限，如果终端设备之间超出该对应的传输范围，就无法使用直连链路进行传输，需要通过与基站建立Uu链路进行通信和数据传输。终端设备在建立直连链路之前，需要先进行直连链路发现流程(Sidelink discovery)，用于发现对端的终端设备并传递建立直连链路的必要信息。而用户终端主要根据核心网设备配置的策略选择不同的传输路径，比如，在终端设备切换到某一小区，或者当前终端设备基于Uu接口的链接不能满足数据传输的指定需求时，基于接入网设备分配的无线资源，执行该直连链路发现流程，在终端设备直接链路建立成功后，会向核心网节点发起请求或核心网节点触发删除Uu路径数传链接，基站不参与触发直接链路建立和删除流程。但很多情况下，由于无法获知需要建立直接链路的终端设备的实时精确位置，对端的终端设备不在建立直连链路的传输范围内，使得本端的终端设备得不到对端的终端设备的响应，而持续进行直连链路发现流程，使得本端的终端设备电量消耗较大，并造成无线资源的浪费。
发明内容
本申请提供一种直连链路建立方法及相关设备，通过本申请可以节约终端设备的电量以及无线网络资源。
本申请实施例第一方面提供了一种业务数据的转移方法，包括：
第一接入网设备向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
可选的，所述第一接入网设备向第一终端设备发送第一指示信息包括：
所述第一接入网设备获取所述第一终端设备的终端位置信息；
所述第一接入网设备根据所述第一终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息。
可选的，其特征在于，所述第一接入网设备获取所述第一终端设备的终端位置信息包括：
所述第一接入网设备获取所述第一终端设备的GPS信息、所述第一终端设备的位置单元标识、所述第一终端设备的功率参考信号、或所述第一终端设备的波束信息中的一个或两个。
可选的，
所述第一接入网设备向第一终端设备发送第一指示信息之前，还包括：
所述第一接入网设备接收核心网设备或者所述第一终端设备发送的第一直接链路信息；
所述第一接入网设备向第一终端设备发送第一指示信息包括：
所述第一接入网设备根据所述第一直接链路信息，向所述第一终端设备发送所述第一指示信息。
可选的，所述第一直连链路信息包括临时移动用户识别码TMSI、无线网络临时标识RNTI、国际移动用户识别码IMSI、流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
可选的，所述第一指示信息携带流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个
可选的，所述第一指示信息用于指示所述第一终端设备触发建立与第二终端设备之间的直连链路流程；
所述方法还包括：
所述第一接入网设备接收第二接入网设备发送的所述第二终端设备的终端位置信息；所述第二接入网设备是所述第二终端设备连接的接入网设备；
所述第一接入网设备根据所述第一终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息包括：
所述第一接入网设备根据所述第一终端设备的终端位置信息，和所述第二终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息。
可选的，所述第一指示信息携带第一时间间隙标识和/或第一资源标识；
所述第一时间间隙标识用于指示所述第一终端设备建立直连链路流程的时间间隙；
所述第一资源标识用于指示所述第一终端设备建立直连链路流程的无线资源。
可选的，所述第一指示信息是无线资源控制RRC消息、媒体接入控制控制元素MAC CE信息或下行控制信息DCI中的一种。
可选的，所述方法还包括：
所述第一接入网设备向第三接入网设备发送所述第一直接链路信息；所述第三接入网设备是所述第一终端设备切换连接的接入网设备。
本申请第二方面提供了一种直连链路建立方法，包括：
第一终端设备接收第一接入网设备发送的第一指示信息；
所述第一终端设备根据所述第一指示信息，触发建立直连链路流程。
可选的，所述方法还包括：
所述第一终端设备向所述第一接入网设备发送所述第一终端设备的终端位置信息。
可选的，所述第一终端设备的终端位置信息包括所述第一终端设备的GPS信息、所述第一终端设备的位置单元标识、所述第一终端设备的功率参考信号、或所述目标终端设备的波束信息中的一个或两个。
可选的，所述第一指示信息是所述第一接入网设备根据第一直接链路信息发送的；
所述第一终端设备接收第一接入网设备发送的第一指示信息之前，还包括：
所述第一终端设备向所述第一接入网设备发送所述第一直接链路信息。
可选的，所述第一直接链路信息包括临时移动用户识别码TMSI、无线网络临时标识RNTI、国际移动用户识别码IMSI、流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
可选的，所述第一指示信息携带流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
可选的，所述第一指示信息携带第一时间间隙标识和/第一资源标识；
所述第一时间间隙标识用于指示所述第一终端设备建立直连链路流程的时间间隙；
所述第一资源标识用于指示所述第一终端设备建立直连链路流程的无线资源。
可选的，所述第一指示信息是无线资源控制RRC消息、媒体接入控制控制元素MAC CE信息或下行控制信息DCI中的一种。
本申请第三方面提供了一种第一接入网设备，包括：
指示信息发送模块，用于向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
本申请第四方面提供了一种第一终端设备，包括：
指示信息接收模块，用于接收第一接入网设备发送的第一指示信息；
触发模块，用于根据所述第一指示信息，触发建立直连链路流程。
本申请第五方面提供了一种通信网络设备，包括：处理器和存储器；
所述处理器与存储器相连，其中，所述存储器用于存储程序代码，所述处理器用于调用所述程序代码，以执行本申请实施例中上述任一方面中的方法。
本申请实施例第六方面提供了一种计算机存储介质，所述计算机存储介质存储有计算机程序，所述计算机程序当被处理器执行时使所述处理器执行上述任一方面中的方法。
本申请实施例第七方面提供了一种计算机程序产品，计算机程序产品包括：计算机程序代码，当计算机程序代码在计算机上运行时，使得计算机执行上述第一方面及其任意一种可能的实现方式中的方法。
本申请实施例中，通过第一接入网设备向第一终端设备发送第一指示信息，第一指示信息用于指示第一终端设备触发建立直接链路流程。使得第一终端设备在第一指示信息的触发下，触发建立直接链路流程，无需持续发送建立直接链路的请求消息，从而节约了第一终端设备的电量和无线资源。
附图说明
图1是本申请实施例提供的一种直接链路建立系统的架构示意图；
图2是本申请实施例提供的一种直连链路建立方法的流程示意图；
图3是本申请实施例提供的另一种直连链路建立方法的流程示意图；
图4是本申请实施例提供的又一种直连链路建立方法的流程示意图；
图5是申请实施例提供的一种第一接入网设备的结构示意图；
图6是本申请实施例提供的一种第一终端设备的结构示意图；
图7是本申请实施例提供的一种通信网络设备的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
首先介绍一种系统架构，参见图1，图1是本申请实施例提供的一种直接链路建立系统的架构示意图，如图1所示，所述系统可以包括第一接入网设备001、第一终端设备002和第二终端设备003。其中第一终端设备002是第一接入网设备001小区内的终端设备，第二终端设备003可以是第一接入网设备001小区内的终端设备，也可以是其他小区的终端设备。本申请实施例提供的直连链路建立方法可以基于图1所示的系统架构实现。第一接入网设备001可以向第一终端设备002发送第一指示信息，第一指示信息可以指示第一终端设备001触发建立与第二用户终端002之间的直连链路流程。
上述系统可以是5G(5Generation)通信系统，还可适用于4G、3G通信系统，还可以是未来新的各种通信系统，例如6G、7G等。上述系统适用于不同的网络架构，包括但不限于中继网络架构、双链接架构、Vehicle-to-Everything(车辆到任何物体的通信)架构等架构。
其中，第一接入网设备001可以包括各种形式的网络设备，例如：宏基站，微基站(也称为小站)，中继站，接入点，小区(Cell)等。上述基站可以是2G网络中提供基站功能的设备包括基地无线收发站(英文：base transceiver station,简称BTS)，可以是3G网络中提供基站功能的设备，包括节点B(NodeB)，可以是在4G网络中提供基站功能的设备包括演进的节点B(evolved NodeB，eNB)，可以是在无线局域网络(wireless local area networks，简称WLAN)中，提供基站功能的设备为接入点(access point，简称AP)，还可以是5G新无线(New Radio，简称NR)中的提供基站功能的设备gNB,以及继续演进的节点B(ng-eNB),其中gNB和终端之间采用NR技术进行通信，ng-eNB和终端之间采用E-UTRA(Evolved Universal Terrestrial Radio Access)技术进行通信，gNB和ng-eNB均可连接到5G 核心网，还可以是在未来新的通信系统中提供基站功能的设备等。
另外，基站也可以为收发点(transmission receive point，TRP)、中心单元(central unit，CU)或其他网络实体。另外，在分布式基站场景中，第一接入网设备001可以是基带处理单元(baseband unit，BBU)和射频单元(remote radio unit，RRU)，在云无线接入网(cloud radio access network，CRAN)场景下可以是基带池BBU pool和射频单元RRU。此外，第一接入网设备001还可以是移动性管理实体(mobility management entity，MME)设备、接入和移动管理功能(access and mobility management function，AMF)设备、车联网控制功能(control function，CF)设备、网关(GateWay)、路边装置(roadsite unit，RSU)、运营管理和维护(operation administration and maintenance，OAM)设备、应用服务器(APP server)或第三方网元。
终端设备(包括第一终端设备002和第二终端设备003)也可以称为接入终端、终端、用户单元、用户站、移动站、移动台、远方站、远程终端、终端设备、移动设备、用户终端、无线网络设备、用户代理、网关设备或用户装置等。终端设备可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless localloop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它设备、车载设备、可穿戴设备或物联网、车辆网中的终端设备以及未来网络中的任意形态的终端设备等。第一接入网设备001与第一终端设备002可以基于上行链路和下行链路建立连接。其中，本申请实施例定义接入网设备到终端设备的单向通信链路为下行链路，而终端设备到接入网设备的单向通信链路为上行链路。
下面介绍本申请实施例提供的直连链路建立方法，参见图2，图2是本申请实施例提供的一种直连链路建立方法的流程示意图，如图2所示，所述方法可以包括步骤S201-S202。
S201，第一接入网设备向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
具体的，在S201之前，可以对第一接入网设备配置第一终端设备相关的连接信息，该信息中包含第一直接链路信息，第一直接链路信息可以指示与第一终端设备建立直连链路的对端的终端设备(记为第二终端设备)的标识和/或指示与第一终端设备建立直连链路的第二终端设备之间的业务的标识等，其中，可以包含第一终端设备建立直接链路的一个或多个对端的终端设备相关信息。可选的，第一直接链路信息还可以指示第一终端设备需要建立的一个或多个直接链路的相关信息，如服务质量(Qos)需求参数、邻近服务类型等。一种实现方式中，第一直接链路信息可以是第一终端设备向第一接入网设备配置的，另一种实现方式中，第一直接链路信息可以是核心网设备向第一接入网设备发送的。
其中，第一直接链路信息可以包括第二终端设备的TMSI(Temporary Mobile Subscriber Identity，临时移动用户识别码)、IMSI(International Mobile Subscriber Identity，国际移动用户识别码)、第二终端设备的RNTI(Radio Network Temporary Identity，无线网络临时标识)、第一终端设备需要建立的直接链路业务的flow ID(业务流标识)、DRB(Data Radio Bearer，数据无线承载)ID、第一终端设备和第二终端设备之间直接链路的业务的destination  ID(目的标识)和source ID(源标识)中的一个或多个。其中RNTI可以是C-RNTI(Cell RNTI，小区无线网络临时标识)或者其他标识终端设备的RNTI。第一接入网设备可以根据TMSI、IMSI或RNTI确定出核心网设备或第一终端设备配置的需要与第一终端设备建立直连链路的第二终端设备；可以通过flow ID、DRB ID、destination ID、source ID中的一个或多个，确定出第一终端设备需要建立直连链路承载的业务信息的标识。
第一接入网设备存储上述第一直连链路信息，并根据上述第一直连链路信息，检测是否需要在满足一定条件的情况下向第一终端设备发送指示第一终端设备触发建立直接链路流程的第一指示信息。
一种实现方式中，第一接入网设备可以获取第一终端设备的终端位置信息，根据第一终端设备的终端位置信息，判断第一终端设备是否满足触发建立直连链路流程的条件。其中，第一终端设备的终端位置信息可以是第一终端设备向第一接入网设备上报的GPS(Global Positioning System，全球定位系统)信息，第一接入网设备可以根据第一接入网设备的GPS信息确定第一终端设备的位置；可以是第一终端设备的位置单元标识(zone ID)，例如，网络可以预先将物理位置划分成不同的组，各个组有唯一对应的zone ID，第一终端设备可以将自己所属的组对应的zone ID，作为第一终端设备的位置单元标识上报给第一接入网设备，第一接入网设备可以根据zone ID确定第一终端设备所处的地理位置范围；也可以是第一终端设备的功率参考信号和波束信息，功率参量信号可以是第一终端设备的RSRP(Reference Signal Receiving Power，参考信号接收功率)，波束信息可以是第一终端设备与基站交互所使用的beam(波束)的信息，第一接入网设备可以根据第一终端设备所使用的beam的信息，确定第一终端设备相对于第一接入网设备的方位角，并根据第一终端设备的RSRP，确定第一终端设备与第一接入网设备的距离，进而根据上述方位角和距离确定第一终端设备的位置。进一步，第一接入网设备可以获取与第一终端设备需要建立直接链路的第二终端设备的终端位置信息，确定第二终端设备的位置，结合第一终端设备的位置，确定两个终端的距离，判断两个终端设备是否可以建立直接链路。
在第一接入网设备在根据第一终端设备的终端位置信息，确定第一终端设备满足触发建立直连链路流程的条件后，向第一终端设备发送第一指示信息，用于指示第一终端设备触发建立直连链路流程。其中，第一指示信息可以是RRC(Radio Resource Control，无线资源控制)消息、MAC(Media Access Control，媒体接入控制)CE(Control Element，控制元素)信息或DCI(Downlink Control Information，下行控制信息)中的一种。
S202，第一终端设备根据第一指示信息触发建立直连链路流程。
第一终端设备在接收到第一指示信息后，触发建立直连链路流程，开始直连链路的发现流程，第一终端设备可以基于第一接入网设备分配的无线资源，在第一接入网设备指定的第一时间间隙(gap)内广播直连链路的发现消息。其中，第一接入网设备为第一终端设备分配无线资源和第一时间间隙之前，第一终端设备可以向第一接入网设备发送SL UE information(辅链路用户信息)消息，以请求基站分配发送发现流程需要的无线资源和/或间隙信息，基站会根据第一终端设备的RF(Radio Frequency，射频)能力参数和discovery performance(直连链路发现性能需求)参数，为第一终端设备分配无线资源和/或第一时间间隙。
一种可选的方式中，第一终端设备被分配的无线资源和指定的第一时间间隙可以是在接收到第一指示信息之前，第一接入网设备为第一终端设备配置的，通过第一指示信息激活第一终端设备使用被分配的无线资源，按照指定的第一时间间隙触发直连链路发现流程；另一种可选的方式中，第一终端设备被分配到的无线资源可以是在接收到第一指示信息之前，第一接入网设备为第一终端设备配置的，而第一时间间隙可以通过第一指示信息中包含的第一时间间隙标识指示，第一终端设备在收到第一指示信息后，使用第一接入网设备配置的无线资源，按照第一指示信息中第一时间间隙标识指示的第一时间间隙触发直连链路发现流程；另一种可选的方式中，第一时间间隙可以是第一终端设备在接收到第一指示信息之前，第一接入网设备为第一终端设备配置的，而第一终端设备被分配到的无线资源标识，可以通过第一指示信息中携带的第一资源标识指示，第一终端设备在收到第一指示信息后，使用第一指示信息携带的第一资源标识所指示的无线资源，按照接入网设备配置的时间间隙触发直连链路发现流程；又一种可选的方式中，第一时间间隙对应的第一时间间隙标识，以及第一终端设备被分配的无线资源对应的第一资源标识，都可以包含于第一指示信息中，通过第一指示信息配置给第一终端设备，该第一终端设备在收到第一指示信息后，使用第一指示信息携带的第一资源标识对应的无线资源，按照第一指示信息包含的第一时间间隙标识指示的第一时间间隙触发直连链路发现流程。
可选的，第一指示信息中还可以携带flow ID、DRB ID、destination ID、或source ID中的一个或多个，上述信息可以是第一接入网设备根据第一直接链路信息包含的信息对应写入第一指示信息的。第一终端设备可以根据上述信息中的一个或多个确定建立直连链路所传输的是哪个业务或哪些业务，并确定需要触发建立的直接链路，进而在直连链路建立后，通过直连链路传输该业务的数据。
本申请实施例中，第一接入网设备向第一终端设备发送第一指示信息，第一终端设备根据第一指示信息触发建立直连链路流程。第一终端设备在第一指示信息的触发下，触发建立直接链路流程，无需持续发送建立直接链路的请求消息，从而节约了第一终端设备的电量和无线资源。
参见图3，图3是本申请实施例提供的另一种直连链路建立方法的流程示意图，如图所述，所述方法可以包括步骤S301-S302。
S301，第一接入网设备获取第一终端设备的终端位置信息和第二终端设备的终端位置信息。
其中，第一终端设备是第一接入网设备小区内的终端设备，第一接入网设备可以通过第一终端设备的GPS信息，或第一终端设备的位置单元标识，或第一终端设备的功率参考信号和波束信息，来确定第一终端设备的终端位置信息。
在第二终端设备是第一接入网设备小区内的终端设备的情况下，第一接入网设备可以按照获取第一终端设备的终端位置信息的方式，获取第二终端设备的终端位置信息；在第二终端设备不是第一接入网设备小区内的终端设备的情况下，第一接入网设备可以接收第二接入网设备发送的第二终端设备的终端位置信息，其中，第二接入网设备是第二终端设备所在的小区对应的接入网设备。一种实现方式中，第二接入网设备可以按照第一接入网 设备获取第一终端设备的终端位置信息的方式，获取第二终端设备的终端位置信息，进而将其发送给第一接入网设备。可选的，第一接入网设备在接收第二接入网设备发送的第二终端设备的终端位置信息之前，可以根据第二终端设备的标识，向第二接入网设备发送关于第二终端设备的终端位置请求信息，进而第二接入网设备在接收到该终端位置请求信息后，可以根据该终端位置请求信息，向第一接入网设备发送第二终端设备的终端位置信息。
S302，第一接入网设备根据第一终端设备的终端位置信息和第二终端设备的终端位置信息，向第一终端设备发送第一指示信息。
具体的，第一接入网设备可以根据第一终端设备的终端位置信息，以及第二终端设备的终端位置信息，确定第一终端设备和第二终端设备之间的距离，进而判断二者之间的距离是否满足建立直连链接的距离条件，确定满足时，向第一终端设备发送第一指示信息，保证第一指示信息是在第一终端设备和第二终端设备之间的距离，在二者的最大发射功率范围内时，触发第一终端设备触发建立直连链路流程。比如，第一接入网设备根据第一终端设备和第二终端设备的GPS位置信息，计算两个终端设备的距离；或者第一接入网设备根据第一终端设备和第二终端设备的zone ID，判断两个终端设备是否在同一区域或者相邻区域内；或者第一接入网设备根据第一终端设备和第二终端设备使用的波束信息和信号强度，判断两个终端设备是否在同一波束方向，并通过信号强度判断两个终端设备的距离，从而确定两个终端设备是否能够进行直接通信。
可选的，第一接入网设备可以根据第一终端设备的终端位置信息和第二终端设备的终端位置信息，向第二终端设备发送第二指示信息；另一种可选的方式中，若第一终端设备在第二接入网设备的小区内，第一接入网设备可以通过第二接入网设备向第二终端设备发送第二指示信息。其中，上述第二指示信息用于指示第二终端设备触发建立直连链路流程。
本申请实施例中，第一接入网设备根据第一终端设备的终端位置信息以及第二终端设备的终端位置信息，向第一终端设备发送第一指示信息，使得第一终端设备在第一终端设备和第二终端设备之间的距离，在二者的最大发射功率范围内时，触发建立直连链路流程，无需持续发送建立直接链路的请求消息，从而节约了第一终端设备的电量和无线资源。
参见图4，图4是本申请实施例提供的又一种直连链路建立方法的流程示意图，如图所述，所述方法可以包括步骤S401-S404。
S401，第一接入网设备接收第一直接链路信息。
其中，第一直接链路信息可以是第一终端设备发送给第一接入网设备的，也可以是核心网设备发送给第一接入网设备的，还可以是由其他接入网设备发送给第一接入网设备的，这里的其他接入网设备是第一接入网设备在切换至第一接入网设备的小区之前所连接的接入网设备。第一直接链路信息中可以包括TMSI、IMSI、RNTI、flow ID、DRB ID、destination ID、source ID中的一个或多个。第一接入网设备可以根据TMSI、IMSI或RNTI确定出需要与第一终端设备建立直连链路的对端的终端设备；可以通过flow ID、DRB ID、destination ID、或source ID可以确定出第一终端设备需要建立直连链路的信息，以及直连链路承载的业务信息的标识。
S402，第一接入网设备根据所述第一直接链路信息，获取第一终端设备的终端位置信 息。
第一接入网设备可以通过第一终端设备的GPS信息，或第一终端设备的位置单元标识，或第一终端设备的功率参考信号和波束信息，来确定第一终端设备的终端位置信息。
S403，第一接入网设备根据所述第一终端设备的终端位置信息，向第一终端设备发送第一指示信息。
其中，第一指示信息用于指示第一终端设备触发建立直连链路流程。第一终端设备在接收到第一指示信息后，基于第一接入网设备分配的无线资源和第一时间间隙，广播直连链路的发现消息。在步骤S403和步骤S403之前，第一终端设备是位于第一接入网设备小区内的终端设备，在步骤S403之后，第一终端设备可以发生移动，切换至第三接入网设备的小区范围内。
S404，第一接入网设备将所述第一直接链路信息发送给第三接入网设备。
在第一终端设备切换至第三接入网设备的小区过程中，第一接入网设备可以将第一直接链路信息发送给第三接入网设备，进而第三接入网设备可以获取第一接入网设备的终端位置信息，并根据第一接入网设备的终端位置信息和/或第二终端设备的终端位置信息，向第一终端设备发送触发建立直连链路流程的指示信息。
本申请实施例中，通过第一接入网设备在接收到第一直接链路信息后，根据第一直接链路信息，获取第一终端设备的终端位置信息，并根据第一终端设备的终端位置信息，向第一终端设备发送指示第一终端设备触发建立直接链路流程的第一指示信息。第一接入设备根据第一终端设备的终端位置信息，向第一终端设备发送第一指示信息，无需持续发送建立直接链路的请求消息，并且在第一终端设备切换至第三接入网设备的小区后，第一接入网设备将第一直接链路信息发送给第三接入网设备，使得小区切换后，也无需持续发送建立直接链路的请求消息，节约了第一终端设备的电量和无线资源。
参阅图5，图5是申请实施例提供的一种第一接入网设备的结构示意图，如图所示，所述第一接入网设备50包括指示信息发送模块501，用于向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
具体实现中，所述第一接入网设备50可以通过其内置的功能模块执行如图2-图4的直连链路建立方法中第一接入网设备执行的各个步骤，具体实施细节可参阅图2-图4对应的实施例中各个步骤的实现细节，此处不再赘述。
本申请实施例中，通过第一指示信息发送模块向第一终端设备发送第一指示信息，第一指示信息用于指示第一终端设备触发建立直接链路流程。使得第一终端设备在第一指示信息的触发下，触发建立直接链路流程，无需持续发送建立直接链路的请求消息，从而节约了第一终端设备的电量和无线资源。
一些实现方式中，图5所示的第一接入网设备50可以是图1所示的第一接入网设备001，如基站等，也可以是第一接入网设备001中的一部分，如基站中的一部分。另一些实现方式中，图5所示的第一接入网设备50可以是芯片、芯片模组、芯片系统、或者芯片中的一部分。
关于上述实施例中描述的第一接入网设备50包含的各个模块，其可以是软件模块，也 可以是硬件模块，或者也可以部分是软件模块，部分是硬件模块。例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，不同的模块可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，不同的模块可以位于终端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现。
参阅图6，图6是本申请实施例提供的一种第一终端设备的结构示意图，如图所示，所述第一终端设备60包括指示信息接收模块601和触发模块602，其中：
指示信息接收模块601，用于接收第一接入网设备发送的第一指示信息；
触发模块602，用于根据所述第一指示信息，触发建立直连链路流程。
具体实现中，所述第一终端设备60可以通过其内置的功能模块执行如图2-图4的直连链路建立方法中第一终端设备执行的各个步骤，具体实施细节可参阅图2-图4对应的实施例中各个步骤的实现细节，此处不再赘述。
本申请实施例中，指示信息接收模块在接收到第一接入网设备发送的第一指示信息后，触发模块根据第一指示信息，触发建立直连链路流程，第一终端设备在第一指示信息的触发下，触发建立直接链路流程，无需持续发送建立直接链路的请求消息，从而节约了第一终端设备的电量和无线资源。
一些实现方式中，图6所示的第一终端设备60可以是图1所示的第一终端设备002，如手机、移动台等，也可以是第一终端设备002中的一部分，如手机中的一部分。另一些实现方式中，图6所示的第一终端设备60可以是芯片、芯片模组、芯片系统、或者芯片中的一部分。
关于上述实施例中描述的第一终端设备60包含的各个模块，其可以是软件模块，也可以是硬件模块，或者也可以部分是软件模块，部分是硬件模块。例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，不同的模块可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的各个模块可以都采用电路等硬件的方式实现，不同的模块可以位于终 端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块可以采用电路等硬件方式实现。
参见图7，图7是本申请实施例提供的一种通信网络设备的结构示意图。如图7所示，所述通信网络设备70可以包括：处理器701、通信接口702和存储器703；例如处理器701、通信接口702和存储器703通过总线704耦合。
存储器703可包括但不限于随机存储记忆体(Random Access Memory，RAM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、只读存储器(Read-Only Memory ROM)或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)等等，该存储器703用于存储相关指令及数据。
处理器701可以是一个或多个中央处理器(Central Processing Unit，CPU)，在处理器701是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
处理器701用于读取所述存储器703中存储的程序代码，与通信接口702配合执行本申请上述实施例中由通信网络设备70执行的方法的部分或全部步骤。
一种实现方式中，所述通信网络设备70可以应用于上述图1对应实施例中的第一接入网设备001，在图7所示的通信网络设备70中，通信接口702主要用于连接终端设备或其他接入网设备；而处理器701可以用于调用存储器703中存储的设备控制应用程序，以实现：
向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
又一种实现方式中，所述通信网络设备70可以应用于上述图1对应实施例中的第一终端设备002，在图7所示的通信网络设备70中，通信接口702主要用于连接接入网设备或与其他终端设备建立直连链路；而处理器701可以用于调用存储器703中存储的设备控制应用程序，以实现：
接收第一接入网设备发送的第一指示信息；
根据所述第一指示信息，触发建立直连链路流程。
应当理解，本申请实施例中所描述的通信网络设备70可执行前文图2-图4所对应实施例中对所述直连链路建立方法的描述，也可执行前文图5所对应实施例中对所述第一接入网设备50或图6所对应实施例中对第一移动终端60的描述，在此不再赘述。另外，对采用相同方法的有益效果描述，也不再进行赘述。
此外，这里需要指出的是：本申请实施例还提供了一种计算机存储介质，且所述计算机存储介质中存储有前文提及的通信网络设备70所执行的计算机程序，且所述计算机程序包括程序指令，当所述处理器执行所述程序指令时，能够执行前文图2-图4所对应实施例中对所述直连链路建立方法的描述，因此，这里将不再进行赘述。另外，对采用相同方法的有益效果描述，也不再进行赘述。对于本申请所涉及的计算机存储介质实施例中未披露的技术细节，请参照本申请方法实施例的描述。
在本申请实施例中还提供了一种计算机程序产品，该计算机产品被通信网络设备运行 时，可以执行上述图7所示实施例中为通信网络设备70所设计的直连链路建立方法。
本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”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。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上所揭露的仅为本申请较佳实施例而已，当然不能以此来限定本申请之权利范围，因此依本申请权利要求所作的等同变化，仍属本申请所涵盖的范围。

Claims (22)

  1. 一种直连链路建立方法，其特征在于，包括：
    第一接入网设备向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
  2. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备向第一终端设备发送第一指示信息包括：
    所述第一接入网设备获取所述第一终端设备的终端位置信息；
    所述第一接入网设备根据所述第一终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述第一接入网设备获取所述第一终端设备的终端位置信息包括：
    所述第一接入网设备获取所述第一终端设备的GPS信息、所述第一终端设备的位置单元标识、所述第一终端设备的功率参考信号、或所述第一终端设备的波束信息中的一个或两个。
  4. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备向第一终端设备发送第一指示信息之前，还包括：
    所述第一接入网设备接收核心网设备或者所述第一终端设备发送的第一直接链路信息；
    所述第一接入网设备向第一终端设备发送第一指示信息包括：
    所述第一接入网设备根据所述第一直接链路信息，向所述第一终端设备发送所述第一指示信息。
  5. 根据权利要求4所述的方法，其特征在于，所述第一直连链路信息包括临时移动用户识别码TMSI、无线网络临时标识RNTI、国际移动用户识别码IMSI、流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
  6. 根据权利要求1所述的方法，其特征在于，所述第一指示信息携带流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
  7. 根据权利要求2所述的方法，其特征在于，所述第一指示信息用于指示所述第一终端设备触发建立与第二终端设备之间的直连链路流程；
    所述方法还包括：
    所述第一接入网设备接收第二接入网设备发送的所述第二终端设备的终端位置信息；所述第二接入网设备是所述第二终端设备连接的接入网设备；
    所述第一接入网设备根据所述第一终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息包括：
    所述第一接入网设备根据所述第一终端设备的终端位置信息，和所述第二终端设备的终端位置信息，向所述第一终端设备发送所述第一指示信息。
  8. 根据权利要求1所述的方法，其特征在于，所述第一指示信息携带第一时间间隙标识和/或第一资源标识；
    所述第一时间间隙标识用于指示所述第一终端设备建立直连链路流程的时间间隙；
    所述第一资源标识用于指示所述第一终端设备建立直连链路流程的无线资源。
  9. 根据权利要求1-8任一所述的方法，其特征在于，所述第一指示信息是无线资源控制RRC消息、媒体接入控制控制元素MAC CE信息或下行控制信息DCI中的一种。
  10. 根据权利要求4或5所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向第三接入网设备发送所述第一直接链路信息；所述第三接入网设备是所述第一终端设备切换连接的接入网设备。
  11. 一种直连链路建立方法，其特征在于，包括：
    第一终端设备接收第一接入网设备发送的第一指示信息；
    所述第一终端设备根据所述第一指示信息，触发建立直连链路流程。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备向所述第一接入网设备发送所述第一终端设备的终端位置信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第一终端设备的终端位置信息包括所述第一终端设备的GPS信息、所述第一终端设备的位置单元标识、所述第一终端设备的功率参考信号、或所述目标终端设备的波束信息中的一个或两个。
  14. 根据权利要求11所述的方法，其特征在于，所述第一指示信息是所述第一接入网设备根据第一直接链路信息发送的；
    所述第一终端设备接收第一接入网设备发送的第一指示信息之前，还包括：
    所述第一终端设备向所述第一接入网设备发送所述第一直接链路信息。
  15. 根据权利要求14所述的方法，其特征在于，所述第一直接链路信息包括临时移动用户识别码TMSI、无线网络临时标识RNTI、国际移动用户识别码IMSI、流标识flow ID、数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
  16. 根据权利要求11所述的方法，其特征在于，所述第一指示信息携带流标识flow ID、 数据无线承载标识DRB ID、目的标识destination ID、或源标识source ID中的一个或多个。
  17. 根据权利要求11所述的方法，其特征在于，所述第一指示信息携带第一时间间隙标识和/第一资源标识；
    所述第一时间间隙标识用于指示所述第一终端设备建立直连链路流程的时间间隙；
    所述第一资源标识用于指示所述第一终端设备建立直连链路流程的无线资源。
  18. 根据权利要求11-17任一所述的方法，其特征在于，所述第一指示信息是无线资源控制RRC消息、媒体接入控制控制元素MAC CE信息或下行控制信息DCI中的一种。
  19. 一种第一接入网设备，其特征在于，包括：
    指示信息发送模块，用于向第一终端设备发送第一指示信息；所述第一指示信息用于指示所述第一终端设备触发建立直连链路流程。
  20. 一种第一终端设备，其特征在于，包括：
    指示信息接收模块，用于接收第一接入网设备发送的第一指示信息；
    触发模块，用于根据所述第一指示信息，触发建立直连链路流程。
  21. 一种通信网络设备，其特征在于，包括：处理器和存储器；
    所述处理器与存储器相连，其中，所述存储器用于存储程序代码，所述处理器用于调用所述程序代码，以执行如权利要求1-10任一项所述的方法，或执行如权利要求11-18任一项所述的方法。
  22. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序被处理器执行以实现权利要求1-10任一项所述的方法，或执行如权利要求11-18任一项所述的方法。
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