WO2021031022A1 - 链路切换的方法和通信设备 - Google Patents

链路切换的方法和通信设备 Download PDF

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Publication number
WO2021031022A1
WO2021031022A1 PCT/CN2019/101196 CN2019101196W WO2021031022A1 WO 2021031022 A1 WO2021031022 A1 WO 2021031022A1 CN 2019101196 W CN2019101196 W CN 2019101196W WO 2021031022 A1 WO2021031022 A1 WO 2021031022A1
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WO
WIPO (PCT)
Prior art keywords
communication device
link
network
indication information
service transmission
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PCT/CN2019/101196
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English (en)
French (fr)
Inventor
刘建华
卢前溪
杨皓睿
Original Assignee
Oppo广东移动通信有限公司
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 Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP19941881.5A priority Critical patent/EP3972346A4/en
Priority to PCT/CN2019/101196 priority patent/WO2021031022A1/zh
Priority to CN201980094756.8A priority patent/CN113632544A/zh
Publication of WO2021031022A1 publication Critical patent/WO2021031022A1/zh
Priority to US17/644,871 priority patent/US20220110025A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • 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

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular to a method and communication device for link switching.
  • the terminal will notify the application layer and the application layer initiates the reconstruction, but this reconstruction process may have a relatively large delay , Resulting in longer business interruptions.
  • the embodiment of the present application provides a method and communication device for link switching, which is beneficial to reduce the delay in the process of restoring service transmission.
  • a method for link switching includes: when the first link between the first communication device and the second communication device cannot perform service transmission, the first communication device establishes The second link between the first communication device and the second communication device; the first communication device uses the second link for the service transmission; wherein the first link and the The communication equipment on the second link is different.
  • a communication device which is used to execute the method in the first aspect or its implementation manner.
  • the terminal device includes a functional module for executing the method in the foregoing first aspect or its implementation manner.
  • a communication device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or its implementation manner.
  • a chip is provided, which is used to implement the method in the first aspect or its implementation manners.
  • the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or its implementation manners.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the first aspect or its implementation manners.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first aspect or its implementation manners.
  • a computer program which when running on a computer, causes the computer to execute the method in the first aspect or its implementation manners.
  • Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a method for link switching provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a method for link switching provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a method for link switching provided by an embodiment of the present application.
  • Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • Fig. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution LTE
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • NR New Radio
  • 5G System etc.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems, low-density signatures (Low Density Signature, LDS) system, etc.
  • SCMA sparse code multiple access
  • LDS Low Density Signature
  • SCMA system and LDS system can also be called other names in the communication field;
  • technical solutions of the embodiments of this application can be applied to multi-carriers using non-orthogonal multiple access technology Transmission systems, such as non-orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized Frequency Division Multiplexing) Frequency Division Multiplexing (GFDM), Filtered-OFDM (F-OFDM) systems, etc.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC Filter Bank Multi-Carrier
  • Generalized Frequency Division Multiplexing Generalized Frequency Division Multiplexing
  • GFDM Frequency Division Multiplexing
  • F-OFDM Filtered-OFDM
  • the direct communication service between devices is mainly aimed at applications such as Augmented Reality (AR)/Virtual Reality (VR), games, etc. It has high service quality such as speed, delay, packet loss rate, and high-speed encoding and decoding. Claim. For example: For VR games, the rate of 10Gbps is required, and the packet loss rate cannot exceed 10E-4.
  • UEs in a direct communication service session between the same devices can be considered to form a service application group, for example, teaming in a game.
  • ⁇ Proximity to each other for example: use device-to-device (D2D) technology for broadcast or multicast, or establish a sidelink (also known as using PC5 interface) for one-to-one communication (single broadcast);
  • D2D device-to-device
  • sidelink also known as using PC5 interface
  • D2D services are also called distance-based services (Proximity-based Services, ProSe).
  • ProSe Proximity-based Services
  • FIG 1 in the D2D communication architecture, because UE1 and UE2 provide related ProSe applications, their interface with the ProSe application server is the PC1 interface, and the interface between UE A and UE B is PC5.
  • UE A and UE B are respectively connected to the ProSe functional entity through the PC3 interface.
  • the interface between the ProSe functional entity and the existing EPC is PC4, and the interface between the ProSe functional entity and the ProSe application server is PC2.
  • EPC Evolved Packet Core Networking
  • EPC includes the attribution User server (Home Subscriber Server, HSS), mobility management entity (Mobility Management Entity, MME), serving GPRS support node (Serving GPRS Support Node, SGSN), policy and charging rule function (Policy and Charging Rule Function, PCRF), Serving Gateway (Serving Gateway, S-GW), Packet Data Gateway (PDN Gateway, P-GW), and Packet Data Network (Packet Data Network, PDN).
  • HSS Home Subscriber Server
  • MME mobility management entity
  • MME serving GPRS support node
  • Policy and Charging Rule Function Policy and Charging Rule Function
  • PCRF Policy and Charging Rule Function
  • S-GW Serving Gateway
  • PDN Gateway Packet Data Gateway
  • PDN Packet Data Network
  • the business between the terminal and the terminal can be directly communicated through the PC5 interface, or the terminal's business can be sent to the application server through the Uu interface, and the application server can then send the business to the opposite terminal.
  • the terminal can directly send the service to the network, and the communication architecture is shown in Figure 2. It can also be sent to the network through a relay, and its communication architecture is shown in Figure 3.
  • the communication system may include access and mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), policy control functions (Policy Control Function, PCF), Application layer functions (AF), user equipment (User Equipment, UE) (where UE may also be called terminal equipment), access network (AN or Radio Access Network, RAN), user plane functions ( User Plane Function (UPF), Data Network (DN), Network Slice Selection Function (NSSF), Authentication Server Function (AUSF), and Unified Data Management (UDM) ).
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • Policy Control Function Policy Control Function
  • PCF Policy Control Function
  • AF Application layer functions
  • user equipment User Equipment
  • UE User Equipment
  • UE User Equipment
  • UE User Equipment
  • AUSF Authentication Server Function
  • UDM Unified Data Management
  • AMF is responsible for mobility management and is connected to UE and AN or RAN
  • SMF is responsible for session management, and is connected to UPF or UDM
  • PCF is responsible for policy control, and can be connected to SMF, AF, and AMF
  • UDM is responsible for contract data management .
  • N1 is the interface between UE and AMF
  • N2 is the interface between AMF and AN or RAN
  • N3 is the interface between AN or RAN and UPF
  • N4 It is the interface between SMF and UPF
  • N5 is the interface between PCF and AF
  • N6 is the interface between UPF and DN
  • N7 is the interface between SMF and PCF
  • N8 is the interface between AMF and UDM.
  • N9 is the interface between UPF
  • N10 is the interface between UDM and SMF
  • N11 is the interface between AMF and SMF
  • N12 is the interface between AUSF and AMF
  • N13 is the interface between AUSF and SMF.
  • N14 is the interface between AMF
  • N15 is the interface between AMF and PCF
  • N22 is the interface between NSSF and AMF
  • Uu interface is the interface between UE and AN or RAN.
  • the remote UE and the eNB communicate through a relay UE, where the relay UE is also called a ProSe UE to network relay.
  • the relay UE can be connected to the eNB through the Uu interface, and the remote UE can be connected to the relay UE through the PC5 interface.
  • the relay UE can be within the coverage area relative to the network, and the remote UE can be outside the coverage area.
  • the eNB is a part of the EPC, and the eNB can connect to the public safety application server through the SGi interface.
  • the network devices in the foregoing various communication architectures may be devices that communicate with terminal devices (or called communication terminals or terminals).
  • the network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area.
  • the network equipment may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station ( Evolutional Node B, eNB or eNodeB), or the wireless controller in Cloud Radio Access Network (CRAN), or the network equipment may be a mobile switching center, a relay station, an access point, a vehicle Wearable devices, hubs, switches, bridges, routers, network devices gNB in 5G networks, or network devices in the future evolution of public land mobile networks (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • eNB evolved base station
  • CRAN
  • the terminal equipment in each of the foregoing communication architectures includes, but is not limited to, User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication device, user agent or user device.
  • UE User Equipment
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile equipment User terminal
  • terminal wireless communication device
  • user agent user device
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., are not limited in the embodiment of the present invention.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • the terminal will notify the application layer and the application layer initiates the reconstruction, but this reconstruction process may have a relatively large delay , Resulting in longer business interruptions.
  • FIG. 4 is a schematic block diagram of a method 100 for link switching provided by an embodiment of the present application. As shown in Figure 4, the method includes some or all of the following:
  • the first communication device uses the second link to perform the service transmission
  • the communication devices on the first link and the second link are different.
  • the terminal may have two link selections in the process of communicating with the terminal or in the process of communicating with the network.
  • the terminal can re-establish another new link, the second link, and use the second link for communication.
  • the method of the embodiment of the present application can be applied to the communication between the terminal and the terminal, that is, the first communication device is the terminal device, and the second communication device is the terminal device; it can also be applied to the communication between the terminal and the network, that is, the first communication device is the terminal device.
  • One communication device is a terminal device, and the second communication device is a network device.
  • the communication devices passing through the first link and the second link are different.
  • the failure of service transmission on the first link can be regarded as a bad communication device on the first link.
  • the second link can be established by replacing or deleting the communication device, and then using the second link. To communicate.
  • the first link can be a direct link (that is, using the PC5 interface) and the communication devices on the first link only include the first terminal device and the second terminal device, and the second link is the first A network link (that is, using a Uu interface) and the communication device on the second link includes a network device in addition to the first terminal device and the second terminal device; or, the first link may be the first network link ( (I.e. Uu interface is used) and the communication equipment on the first link includes not only the first terminal equipment and the second terminal equipment, but also network equipment.
  • the second link is a direct link (that is, using the PC5 interface) and the second link The communication devices on the second link only include the first terminal device and the second terminal device.
  • FIG. 5 shows a schematic diagram of the terminal-terminal service switching between the direct link and the network link in an embodiment of the present application.
  • UE 1 and UE 2 are communicating through a direct link; in step 2, UE 1 can detect that the direct link fails or is about to fail, in other words, the direct link The link cannot carry out service transmission.
  • the UE 1 can establish a network link connection, that is, it can send a non-access stratum (NAS) message to the core network (Core Network, CN), which may include service request or protocol data Unit (Protocol Data Unit, PDU) session establishment request.
  • NAS non-access stratum
  • CN core network
  • PDU protocol Data Unit
  • UE 1 may notify UE 2, that is, send indication information to UE 2.
  • the main function of the indication information is to enable UE 2 to also start to establish a network link.
  • the indication information may be an indication At least one of the following information: the direct link fails or is about to fail, the service link is about to be or has been switched to the network link, and the direct link is about to be or has been released, etc.
  • the specific indication information in the embodiment of this application The content is not limited; in step 5, UE1 and UE2 can negotiate link switching, and UE1 can then perform terminal-to-terminal service transmission with UE2 through the network link.
  • the detection of the direct link can also be performed by the UE 2, that is, the UE 2 actively detects the direct link, and in the case that the direct link is unable to perform service transmission, send a message to the UE 1 to start the establishment Instructions for the network link. Furthermore, the UE 1 starts to establish a network link connection, and uses the network link to perform terminal-to-terminal service transmission after negotiating link switching with the UE 2.
  • UE 2 may also perform steps similar to UE 1 until the communication between the terminal and the terminal is switched from the direct link to the network link. No matter which terminal of UE 1 or UE 2 first detects that the direct link cannot perform service transmission, it can indicate to the opposite end, for example, through PC5-S (Signalling) signaling or PC5-Radio Resource Control (Radio Resource Control). Resource Control (RRC) signaling indication. After receiving the instruction information, the opposite end can also start to establish a network link connection.
  • PC5-S Signaling
  • RRC Resource Control
  • the negotiation process of link handover between UE1 and UE2 may include:
  • the UE 1 when the UE 1 completes the establishment of the network link first, it can send indication information to the UE 2 to instruct the UE 2 to end sending and receiving data on the direct link, and/or to instruct the UE 2 to Send and receive data on the network link.
  • UE2 After UE2 receives the indication information, it can directly send data to UE1 without using the direct link, nor can it receive data from UE1 via the direct link.
  • the UE 2 can further determine whether the network link of the UE 2 has been established at this time, and if the establishment is complete, the UE 2 It is possible to directly send data to UE 1 not through a direct link, nor receive data from UE 1 through a direct link; instead, to send data to UE 1 through a network link and receive data from UE 1 through a network link; and If the establishment has not been completed, UE 2 can reply to UE 1 to continue using the direct link. Optionally, the UE 2 can choose to continue to establish the network link at this time, or stop establishing the network link.
  • the UE 1 can be notified to switch to the network link.
  • the indication information may also carry timer information. If the timer expires, the UE 2 will finish receiving and sending data on the direct link. Or, if the timer expires, the UE 2 can send and receive data on the network link. Or, the timer can be used for when the UE 2 has not completed the establishment of the network link, if the timer expires, the establishment is no longer established, and if the timer does not expire, the establishment continues.
  • the timer may be started when the UE 2 receives the indication information carrying the timer information or when the UE 1 replies to the response information of the indication information.
  • UE 2 when UE 2 completes the establishment of the network link first, it can send indication information to UE 1 to instruct UE 1 to end sending and receiving data on the direct link, and/or to instruct UE 1 Send and receive data on the network link. After the UE 1 receives the indication information, it can directly send data to the UE 2 without using the direct link, nor can it receive the data of the UE 2 via the direct link. Further, after the UE 1 receives the instruction to end sending or receiving data on the direct link, it can further determine whether the network link of the UE 1 has been established at this time.
  • the UE 1 It is possible to directly send data to UE 2 not through a direct link, nor to receive data from UE 2 through a direct link; instead, to send data to UE 2 through a network link and receive data from UE 2 through a network link; and If the establishment has not been completed, the UE 1 can reply to the UE 2 to continue using the direct link. Optionally, the UE 1 can choose to continue to establish the network link at this time, or stop establishing the network link. If the network link of the subsequent UE 1 is successfully established, the UE 2 can be notified to switch to the network link. Optionally, the indication information may also carry timer information. If the timer expires, the UE 1 ends receiving and sending data on the direct link.
  • the UE 1 can send and receive data on the network link.
  • the timer can be used for when the UE 1 has not completed the establishment of the network link, if the timer expires, the establishment is no longer established, and if the timer does not expire, the establishment continues.
  • the timer can be started when the UE 1 receives the indication information carrying the timer information or when the UE 2 replies to the response information of the indication information.
  • the indication information can be sent to the opposite end.
  • the indication information to end sending or receiving data on the direct link can also be indicated by PC5-S (Signalling) signaling or PC5-Radio Resource Control (Radio Resource Control, RRC) signaling.
  • PC5-S Signaling
  • PC5-Radio Resource Control Radio Resource Control, RRC
  • the network link of UE 1 when the network link of UE 1 is established, it can send data to UE 2 through the network link.
  • UE 2 receives data from UE 1 on the network link, it uses the network The link sends data.
  • the application layer of UE 2 receives the data from UE 1, and the application layer of UE 2 notifies the lower layer, such as the PC5 layer or the RRC layer.
  • the network link of UE 2 when the network link of UE 2 is established, it can send data to UE 1 through the network link.
  • UE 1 receives data from UE 2 on the network link, it uses the network link to send data. In other words, when UE 1 receives the data of UE 2 on the network link, it uses the network link for service transmission.
  • UE 1 or UE 2 determines that the direct link cannot perform service transmission, and can determine whether the link quality of the direct link meets a preset condition. For example, it can be determined based on the network configuration criteria whether the direct link cannot perform service transmission. Specifically, it can be judged based on the threshold of link quality configured by the network, for example, the measured value of the link quality of the quality link is less than the threshold; or, it can be based on a specific application, quality of service (QoS), or The PDU session judgment, for example, whether it is smaller than the threshold value in a specific application, QoS or PDU session, the specific application, QoS or PDU session may be related to the service to be transmitted.
  • QoS quality of service
  • UE 1 or UE 2 detects that the network link with the network cannot perform service transmission, and can establish a direct link, and use the direct link to perform service transmission. Further, UE 1 or UE 2 indicates to the opposite end that the network link cannot perform service transmission, or can also indicate to the opposite end to end sending or receiving data on the network link.
  • the detailed description of this solution can be found above. For brevity, I won't repeat them here.
  • FIG. 5 shows that UE1 is served by RAN1 and UE2 is served by RAN2, and UE1 and UE2 may be served by the same RAN.
  • Terminal-network service the first link is a relay link and the communication equipment on the first link includes remote terminal equipment, network equipment, and relay terminal equipment.
  • the second link is the second network link and the The communication equipment on the second link includes remote terminal equipment and network equipment; or the first link is the second network link and the communication equipment on the first link includes remote terminal equipment and network equipment, and the second link It is a relay link and the communication equipment on the second link includes remote terminal equipment, network equipment, and relay terminal equipment.
  • FIG. 6 shows a schematic diagram of the terminal-network service switching between the relay link and the network link in an embodiment of the present application.
  • UE 1 and UE 2 are communicating through the relay link; in step 2, UE 1 can detect that the relay link fails or is about to fail. In other words, the relay The link cannot carry out service transmission.
  • the UE 1 can establish a network link connection, that is, it can send a non-access stratum (NAS) message to the core network (Core Network, CN), which can include a service request or protocol data Unit (Protocol Data Unit, PDU) session establishment request.
  • NAS non-access stratum
  • CN core network
  • PDU protocol Data Unit
  • the relay link mainly includes two parts using the PC5 interface and the Uu interface shown in FIG. 3.
  • the remote UE can detect by itself that the direct link between it and the relay UE fails or is about to fail, that is, the service cannot be transmitted, and the remote UE can think that the relay link between it and the network equipment (RAN) cannot For service transmission, the establishment of a network link can be initiated to the CN.
  • RAN network equipment
  • the relay UE may also detect that the direct link between it and the remote UE cannot perform service transmission, and/or the network link between it and the network equipment (RAN) cannot perform service transmission, then the relay The UE can indicate to the remote UE that the relay link cannot perform service transmission, and the remote UE can initiate the establishment of a network link to the CN.
  • RAN network equipment
  • the method of judging that the relay link cannot perform service transmission is similar to the method of judging that the direct link cannot perform service transmission described above, and will not be repeated here.
  • the remote UE When the remote UE initiates a connection establishment request of the network link, and after the establishment is completed, the network link can be used for service transmission. Further, the remote UE may also notify the network side to delete the connection of the relay link, or notify the relay UE to initiate a release request of the relay link. Optionally, the relay UE may also actively initiate a relay link release request.
  • FIG. 7 shows a schematic block diagram of a communication device 200 according to an embodiment of the present application.
  • the communication device 400 is a first communication device, and the communication device 400 includes:
  • the processing unit 210 is configured to establish a second communication device between the first communication device and the second communication device when the first link between the first communication device and the second communication device cannot perform service transmission. link;
  • the transceiver unit 220 is configured to use the second link to perform the service transmission
  • the communication devices on the first link and the second link are different.
  • the first link is a direct link and the first link is
  • the communication device includes the first communication device and the second communication device
  • the second link is a first network link
  • the communication device on the second link includes the first communication device, The second communication device and the network device; or when the first communication device and the second communication device are both terminal devices, the first link is the first network link and the first link
  • the communication device on the road includes the first communication device, the second communication device, and the network device.
  • the second link is a direct link and the communication device on the second link includes the first communication device.
  • the transceiving unit is further configured to: send first indication information to the second communication device when the first link cannot perform service transmission, and the second communication device An indication information is used to instruct the second communication device to establish the second link.
  • the transceiving unit is further configured to: receive the first indication information sent by the second communication device when the first link cannot perform service transmission;
  • the processing unit is specifically configured to establish the second link in response to the first indication information.
  • the transceiver unit is further configured to send a second instruction to the second communication device when the first communication device completes the establishment of the second link Information, the second indication information is used to instruct the second communication device to end sending and receiving data on the first link, and/or the second indication information is used to instruct the second communication device Send and receive data on the second link.
  • the transceiving unit is further configured to: receive second indication information sent by the second communication device, where the second indication information is used to instruct the first communication device to finish Sending and receiving data on the first link, and/or the second indication information is used to instruct the second communication device to send and receive data on the second link; the transceiver unit specifically uses For: in response to the second indication information, use the second link to perform the service transmission.
  • the second indication information is used to indicate the end of sending and receiving data on the first link when the first timer expires, and/or the first The second indication information is used to indicate sending and receiving data on the second link when the first timer expires.
  • the first timer is started when the second indication information is received or when response information to the second indication information is sent.
  • the transceiver unit is specifically configured to: in response to data received on the second link, use the second link to perform the service transmission.
  • the first link is a relay link and the first link
  • the communication device on the road includes the first communication device, the second communication device, and the relay device
  • the second link is a second network link
  • the communication device on the second link includes all The first communication device and the second communication device; or when the first communication device is a terminal device and the second communication device is a network device, the first link is a second network link and The communication device on the first link includes the first communication device and the second communication device, the second link is a relay link, and the communication device on the second link includes the The first communication device, the second communication device, and the relay device.
  • the transceiving unit is further configured to: receive third indication information sent by the relay device, where the third indication information is used to indicate that the relay link cannot perform services transmission.
  • the transceiving unit is further configured to: in the case that the first communication device uses the second link to perform the service transmission, notify the network device to delete the Relay link; or in the case where the first communication device uses the second link for the service transmission, instruct the relay device to send the relay link release request to the network device .
  • the processing unit is further configured to: when the link quality of the first link is so poor that the first condition is satisfied, determine that the first link cannot perform services transmission.
  • the processing unit is specifically configured to: if the measured value of the link quality of the first link is less than a first threshold, determine that the first link cannot perform service transmission.
  • the first threshold is configured by the network side or determined based on the application corresponding to the service to be transmitted, the quality of service QoS, or the requirements in the protocol data unit PDU session.
  • the communication device 200 may correspond to the first communication device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the communication device 200 are to implement the method in FIG. 4 respectively.
  • the corresponding process of the terminal device in the middle is not repeated here.
  • FIG. 8 is a schematic structural diagram of a communication device 300 provided by an embodiment of the present application.
  • the communication device 300 shown in FIG. 8 includes a processor 310, and the processor 310 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 300 may further include a memory 320.
  • the processor 310 may call and run a computer program from the memory 320 to implement the method in the embodiment of the present application.
  • the memory 320 may be a separate device independent of the processor 310, or may be integrated in the processor 310.
  • the communication device 300 may further include a transceiver 330, and the processor 310 may control the transceiver 330 to communicate with other devices, specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 330 may include a transmitter and a receiver.
  • the transceiver 330 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 300 may specifically be a network device of an embodiment of the application, and the communication device 300 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For the sake of brevity, details are not repeated here. .
  • the communication device 300 may specifically be a terminal device of an embodiment of the application, and the communication device 300 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the application. For brevity, details are not repeated here. .
  • FIG. 9 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 400 shown in FIG. 9 includes a processor 410, and the processor 410 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the chip 400 may further include a memory 420.
  • the processor 410 can call and run a computer program from the memory 420 to implement the method in the embodiment of the present application.
  • the memory 420 may be a separate device independent of the processor 410, or may be integrated in the processor 410.
  • the chip 400 may further include an input interface 430.
  • the processor 410 can control the input interface 430 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 400 may further include an output interface 440.
  • the processor 410 can control the output interface 440 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the communication device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the first communication device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the first communication device in each method of the embodiment of the present application.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synchlink DRAM SLDRAM
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the terminal device in the embodiment of this application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the terminal device in the embodiment of the present application.
  • the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the 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 function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

本申请实施例公开了一种链路切换的方法和通信设备，该方法包括：在第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，所述第一通信设备建立所述第一通信设备与所述第二通信设备之间的第二链路；所述第一通信设备使用所述第二链路进行所述业务传输；其中，所述第一链路和所述第二链路上的通信设备不同。本申请实施例的方法和通信设备，有利于降低恢复业务传输过程中的时延。

Description

链路切换的方法和通信设备 技术领域
本申请实施例涉及通信技术领域，具体涉及一种链路切换的方法和通信设备。
背景技术
目前，在终端与终端的业务，或者终端与网络的业务传输过程中，如果发生链路失败，终端将会告知应用层，由应用层发起重建，但是这个重建过程可能会有比较大的时延，从而导致业务中断的时间较长。
发明内容
本申请实施例提供一种链路切换的方法和通信设备，有利于降低恢复业务传输过程中的时延。
第一方面，提供了一种链路切换的方法，该方法包括：在第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，所述第一通信设备建立所述第一通信设备与所述第二通信设备之间的第二链路；所述第一通信设备使用所述第二链路进行所述业务传输；其中，所述第一链路和所述第二链路上的通信设备不同。
第二方面，提供了一种通信设备，用于执行上述第一方面或其实现方式中的方法。
具体地，该终端设备包括用于执行上述第一方面或其实现方式中的方法的功能模块。
第三方面，提供了一种通信设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其实现方式中的方法。
第四方面，提供了一种芯片，用于实现上述第一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行如上述第一方面或其各实现方式中的方法。
第五方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面或其各实现方式中的方法。
第七方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面或其各实现方式中的方法。
通过上述技术方案，若两个通信设备之间当前正在使用的第一链路无法进行业务传输，可以建立两个设备之间的第二链路，并使用新建立的第二链路进行业务传输，从而有利于降低恢复业务传输过程中的时延。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是本申请实施例提供的一种通信系统架构的示意性图。
图3是本申请实施例提供的一种通信系统架构的示意性图。
图4是本申请实施例提供的链路切换的方法的示意性框图。
图5是本申请实施例提供的链路切换的方法的示意性框图。
图6是本申请实施例提供的链路切换的方法的示意性框图。
图7是本申请实施例提供的一种通信设备的示意性框图。
图8是本申请实施例提供的一种通信设备的示意性框图。
图9是本申请实施例提供的一种芯片的示意性框图。
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描述，显然，所描述的实施例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。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进LTE系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、新无线(New Radio，NR)或未来的5G系统等。
特别地，本申请实施例的技术方案可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(Sparse Code Multiple Access，SCMA)系统、低密度签名(Low Density Signature，LDS)系统等，当然SCMA系统和LDS系统在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)、滤波器组多载波(Filter Bank Multi-Carrier，FBMC)、通用频分复用(Generalized Frequency Division Multiplexing，GFDM)、滤波正交频分复用(Filtered-OFDM，F-OFDM)系统等。
随着5G应用的不断发展，设备间直连通信业务作为一个新的业务形态被引入到标准中进行相关的标准化业务。
设备间直连通信业务主要针对增强现实(Augmented Reality，AR)/虚拟现实(Virtual Reality，VR)、游戏等应用，对速率、时延、丢包率、高速编解码等业务质量有很高的 要求。例如：对于VR游戏，需要达到10Gbps速率，丢包率不可超过10E-4。针对设备间直连通信业务建立的会话，在相同设备间直连通信业务会话的UE可以认为组成一个业务应用组，例如：游戏中组队。
组内终端之间有以下可能的通信方式，可以组合使用：
●彼此临近，例如：使用设备到设备(Device-to-Device，D2D)技术进行广播或组播，或建立侧行链路(sidelink)(也称为使用PC5接口)进行1对1通信(单播)；
●远离彼此，例如使用UE-网络-服务器-对端网络-对端UE(也称为使用Uu接口)。
D2D技术的通信架构如图1所示。D2D业务还被称为基于距离的业务(Proximity-based Services，ProSe)。如图1所示，在D2D通信架构中，由于UE1和UE2提供了相关的ProSe应用(application)，其和ProSe应用服务器的接口为PC1接口，UE A和UE B之间的接口为PC5，用于UE之间的直接通信，UE A和UE B分别通过PC3接口与ProSe功能实体连接，ProSe功能实体与现有EPC之间的接口是PC4，ProSe功能实体与ProSe应用服务器的接口为PC2。在演进分组系统(Evolved Packet System，EPS)中，整个EPS包括无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)和移动核心网(Evolved PacketCore Networking，EPC)，其中，EPC包含了归属用户服务器(Home Subscriber Server，HSS)、移动性管理实体(Mobility Management Entity，MME)、服务GPRS支持节点(Serving GPRS Support Node，SGSN)、策略计费规则功能(Policy and Charging Rule Function，PCRF)、服务网关(Serving Gateway，S-GW)、分组数据网关(PDN Gateway，P-GW)和分组数据网络(Packet Data Network，PDN)。其中，E-UTRAN与EPC之间的接口为S1接口，UE A和UE B分别通过LTE-Uu接口与E-UTRAN相连。
在这种通信架构中，终端与终端之间的业务可以通过PC5接口直接通信，也可以是终端的业务经过Uu接口发送到应用服务器，应用服务器再将业务发送到对端终端。
对于终端与网络之间的通信可以是终端直接将业务发送到网络，其通信架构如图2所示。也可以是通过中继的方式发送给网络，其通信架构如图3所示。
如图2所示，该通信系统可以包括接入和移动性管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、策略控制功能(Policy Control Function，PCF)、应用层功能(Application Function，AF)、用户设备(User Equipment，UE)(其中，UE也可以称为终端设备)、接入网(Access Network，AN或Radio Access Network，RAN)、用户平面功能(User Plane Function，UPF)、数据网络(Data Network，DN)、网络切片选择功能(Network Slice Selection Function，NSSF)、鉴权服务功能(Authentication Server Function，AUSF)以及统一数据管理(Unified Data Management，UDM)。
其中，AMF负责移动性管理，并与UE和AN或RAN相连，SMF负责会话管理，与UPF或UDM相连，PCF负责策略控制，可与SMF、AF、以及AMF相连，UDM负 责用于签约数据管理。
各个设备之间可以具有不同的接口，例如，N1是连接UE和AMF之间的接口，N2是连接AMF和AN或RAN之间的接口，N3是连接AN或RAN和UPF之间的接口，N4是连接SMF和UPF之间的接口，N5是连接PCF和AF之间的接口，N6是连接UPF和DN之间的接口，N7是连接SMF和PCF之间的接口，N8是连接AMF和UDM之间的接口，N9是UPF之间的接口，N10是连接UDM和SMF之间的接口，N11是连接AMF和SMF之间的接口，N12是连接AUSF和AMF之间的接口，N13是连接AUSF和UDM之间的接口，N14是AMF之间的接口，N15是AMF和PCF之间的接口，N22是连接NSSF和AMF之间的接口，Uu接口是连接UE和AN或RAN之间的接口。
如图3所示，远端UE与eNB之间通过中继UE进行通信，其中，中继UE也被称为ProSe UE到网络中继。中继UE可以通过Uu接口连接到eNB，远端UE通过PC5接口连接到中继UE，中继UE相对于网络来说是可以是在覆盖范围内的，远端UE可以在覆盖范围之外。eNB是EPC的一部分，eNB可以通过SGi接口连接到公共安全应用服务器。
可选地，上述各种通信架构中的网络设备可以是与终端设备(或称为通信终端、终端)通信的设备。网络设备可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。可选地，该网络设备可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络设备gNB或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
可选地，上述各通信架构中的终端设备包括但不限于用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，PLMN)中的终端设备等，本发明实施例并不限定。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种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：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
目前，在终端与终端的业务，或者终端与网络的业务传输过程中，如果发生链路失败，终端将会告知应用层，由应用层发起重建，但是这个重建过程可能会有比较大的时延，从而导致业务中断的时间较长。
图4是本申请实施例提供的链路切换的方法100的示意性框图。如图4所示，该方法包括以下部分或全部内容：
S110，在第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，所述第一通信设备建立所述第一通信设备与所述第二通信设备之间的第二链路；
S120，所述第一通信设备使用所述第二链路进行所述业务传输；
其中，所述第一链路和所述第二链路上的通信设备不同。
,如上文描述可知，终端在与终端通信的过程中，或者与网络通信的过程中分别可以有两条链路选择，在本申请实施例中，如果当前进行通信的第一链路无法进行业务传输，终端可以重新建立另外一条新的链路，即第二链路，并使用该第二链路进行通信。
可选地，本申请实施例的方法可以适用于终端与终端的通信中，即第一通信设备为终端设备，第二通信设备为终端设备；也可以适用于终端与网络的通信中，即第一通信设备为终端设备，第二通信设备为网络设备。并且第一链路与第二链路上经过的通信设备不同。第一链路无法进行业务传输可以认为是第一链路上的某个通信设备不好，可以通过重新替换或删减该通信设备来实现第二链路的建立，进而再使用第二链路进行通信。
下面将分别以进行终端-终端业务以及终端-网络业务为例详细描述本申请技术方案。
终端-终端业务：第一链路可以是直连链路(即使用PC5接口)并且该第一链路上的通信设备只包括第一终端设备和第二终端设备，第二链路为第一网络链路(即使用Uu接口)且该第二链路上的通信设备除了包括第一终端设备、第二终端设备，还包括网络设备；或者，第一链路可以是第一网络链路(即使用Uu接口)且该第一链路上的通信设备除了包括第一终端设备、第二终端设备，还包括网络设备，第二链路为直连链路(即使用PC5接口)并且该第二链路上的通信设备只包括第一终端设备和第二终端设备。
图5示出了本申请实施例关于终端-终端业务在直连链路和网络链路之间切换的一种示意图。如图5所示，在步骤1中，UE 1与UE 2正在通过直连链路进行通信；在步骤2中，UE 1可以检测出来直连链路失败或者即将失败，换句话说，直连链路无法进行业务传输。在步骤3中，UE 1可以建立网络链路的连接，即可以向核心网(Core Network，CN)发送非接入层(Non-access stratum，NAS)消息，其中，可以包括服务请求或协议数据单元(Protocol Data Unit，PDU)会话建立请求。可选地，在步骤4中，UE 1可以通知UE 2，即向UE 2发送指示信息，该指示信息的主要作用是使得UE 2也开始建立网络链路，具体地，该指示信息可以是指示以下信息中的至少一种信息：直连链路失败或将要失败，业务链路将要或已经切换到网络链路以及直连链路将要或已经释放等，本申请实施例对该指示信息的具体内容不作限制；在步骤5中，UE 1和UE 2可以进行链路切换的协商，进而UE 1就可以通过网络链路与UE 2进行终端-终端业务的传输。
可选地，直连链路的检测也可以由UE 2进行，即由UE 2主动进行直连链路的检测， 并在直连链路无法进行业务传输的情况下，向UE 1发送开始建立网络链路的指示信息。进而，UE 1开始建立网络链路的连接，并在与UE 2进行链路切换的协商之后使用网络链路进行终端-终端业务的传输。
可选地，UE 2也可以执行与UE 1类似的步骤，直到将终端与终端之间的通信从直连链路切换为网络链路为止。无论是UE 1和UE 2中的哪个终端先检测出来直连链路无法进行业务传输，都可以向对端指示，例如，可以通过PC5-S(Signalling)信令或者PC5-无线资源控制(Radio Resource Control，RRC)信令指示。对端在接收到指示信息之后，同样地，可以开始建立网络链路的连接。
UE 1与UE 2进行链路切换的协商过程，可以包括：
一种可能的实施例，在UE 1先完成网络链路的建立的情况下，可以向UE 2发送指示信息，指示UE 2结束在直连链路上收发数据，和/或，指示UE 2在网络链路上收发数据。而UE2在接收到该指示信息之后，就可以直接不通过直连链路向UE 1发送数据，也不通过直连链路接收UE 1的数据。进一步地，当UE 2接收到结束在直连链路上发送或接收数据的指示信息之后，还可以进一步地判断UE 2此时的网络链路是否已经建立完成，如果已经建立完成，则UE 2可以直接不通过直连链路向UE 1发送数据，也不通过直连链路接收UE 1的数据；而是通过网络链路向UE 1发送数据以及通过网络链路接收UE 1的数据；而如果还没有建立完成，则UE 2可以向UE 1回复继续使用直连链路。可选地，UE 2此时可以选择继续建立网络链路，也可以停止建立网络链路，如果后续UE 2的网络链路建立成功了，可以告知UE 1切换到网络链路。可选地，该指示信息中还可以携带定时器信息，如果定时器超时了，UE 2才结束在直连链路上接收和发送数据。或者，如果定时器超时了，UE 2就可以在网络链路上收发数据了。再或者，该定时器可以用于在UE 2还没有完成网络链路的建立时，若定时器超时就不再建立了，若定时器未超时则继续建立。可选地，该定时器可以在UE 2接收到携带定时器信息的指示信息时启动或者向UE 1回复该指示信息的响应信息时启动。
另外一种可替代的实施例，在UE 2先完成网络链路的建立的情况下，可以向UE 1发送指示信息，指示UE 1结束在直连链路上收发数据，和/或，指示UE 1在网络链路上收发数据。而UE 1在接收到该指示信息之后，就可以直接不通过直连链路向UE 2发送数据，也不通过直连链路接收UE 2的数据。进一步地，当UE 1接收到结束在直连链路上发送或接收数据的指示信息之后，还可以进一步地判断UE 1此时的网络链路是否已经建立完成，如果已经建立完成，则UE 1可以直接不通过直连链路向UE 2发送数据，也不通过直连链路接收UE 2的数据；而是通过网络链路向UE 2发送数据以及通过网络链路接收UE 2的数据；而如果还没有建立完成，则UE 1可以向UE 2回复继续使用直连链路。可选地，UE 1此时可以选择继续建立网络链路，也可以停止建立网络链路，如果后续UE 1的网络链路建立成功了，可以告知UE 2切换到网络链路。可选地，该指示信息中还可以携带定时器信息，如果定时器超时了，UE 1才结束在直连链路上接收和发送数据。或者，如果定时器超时了，UE 1就可以在网络链路上收发数据了。再或者，该定时 器可以用于在UE 1还没有完成网络链路的建立时，若定时器超时就不再建立了，若定时器未超时则继续建立。可选地，该定时器可以在UE 1接收到携带定时器信息的指示信息时启动或者向UE 2回复该指示信息的响应信息时启动。
可选地，只要UE 1或UE 2完成网络链路的建立，都可以向对端发送指示信息。
可选地，结束在直连链路上发送或接收数据的指示信息也可以通过PC5-S(Signalling)信令或者PC5-无线资源控制(Radio Resource Control，RRC)信令指示。
另外一种可替代的实施例，当UE 1的网络链路建立完成时，可以通过网络链路向UE 2发送数据，当UE 2在网络链路上接收到UE 1的数据时，则使用网络链路发送数据，换句话说，当UE 2在网络链路上接收到UE 1的数据时，则使用网络链路进行业务传输。具体地，UE 2的应用层接收到来自UE 1的数据，UE 2的应用层通知低层，例如PC5层或者RRC层。类似地，当UE 2的网络链路建立完成时，可以通过网络链路向UE 1发送数据，当UE 1在网络链路上接收到UE 2的数据时，则使用网络链路发送数据，换句话说，当UE 1在网络链路上接收到UE 2的数据时，则使用网络链路进行业务传输。
可选地，UE 1或UE 2确定直连链路无法进行业务传输，可以判断直连链路的链路质量是否满足预设条件。例如，可以基于网络配置的准则确定直连链路是否无法进行业务传输。具体地，可以基于网络配置的链路质量的门限判断，例如，质量链路的链路质量的测量值小于门限值；或者，可以基于特定的应用、服务质量(Quality of Service，QoS)或者PDU会话判断，例如，是否小于特定的应用、QoS或者PDU会话中的门限值，该特定的应用、QoS或者PDU会话可以是与待传输的业务相关的。
需要说明的是，上文中是以将直连链路切换到网络链路为例描述的，但本申请实施例同样适用于将网络链路切换到直连链路。具体地，UE 1或UE 2检测出与网络之间的网络链路无法进行业务传输，可以建立直连链路，并使用直连链路进行业务传输。进一步地，UE 1或UE 2向对端指示网络链路无法进行业务传输，或者还可以向对端指示结束在网络链路发送或接收数据，该方案的详细描述可参见上文，为了简洁，此处不再赘述。
应理解，图5是以RAN1服务UE1，RAN2服务UE2为例示出的，UE1和UE2可以是由同一个RAN服务。
终端-网络业务：第一链路为中继链路且第一链路上的通信设备包括远端终端设备、网络设备以及中继终端设备，第二链路为第二网路链路且第二链路上的通信设备包括远端终端设备和网络设备；或第一链路为第二网路链路且第一链路上的通信设备包括远端终端设备和网络设备，第二链路为中继链路且第二链路上的通信设备包括远端终端设备、网络设备以及中继终端设备。
图6示出了本申请实施例关于终端-网络业务在中继链路和网络链路之间切换的一种示意图。如图6所示，在步骤1中，UE 1与UE 2正在通过中继链路进行通信；在步骤2中，UE 1可以检测出来中继链路失败或者即将失败，换句话说，中继链路无法进行业务传输。在步骤3中，UE 1可以建立网络链路的连接，即可以向核心网(Core Network， CN)发送非接入层(Non-access stratum，NAS)消息，其中，可以包括服务请求或协议数据单元(Protocol Data Unit，PDU)会话建立请求。
可选地，在本申请实施例中，中继链路主要包括图3所示的使用PC5接口以及使用Uu接口这两部分。远端UE可以自己检测其与中继UE之间的直连链路失败或即将失败，即无法进行业务传输，远端UE就可以认为其与网络设备(RAN)之间的中继链路无法进行业务传输，进而可以向CN发起网络链路的建立。或者，也可以由中继UE检测其与远端UE之间的直连链路无法进行业务传输，和/或其与网络设备(RAN)之间的网络链路无法进行业务传输，那么中继UE就可以向远端UE指示中继链路无法进行业务传输，进而远端UE可以向CN发起网络链路的建立。
同样地，判断中继链路无法进行业务传输的方式同上文描述的判断直连链路无法进行业务传输的方式类似，此处不再赘述。
当远端UE发起网络链路的连接建立请求，并在建立完成之后就可以使用网络链路进行业务传输。进一步地，远端UE还可以通知网络侧删除中继链路的连接，或者通知中继UE发起中继链路的释放请求。可选地，中继UE也可以主动发起中继链路的释放请求。
需要说明的是，上文中是以将中继链路切换到网络链路为例描述的，但本申请实施例同样适用于将网络链路切换到中继链路。本申请实施例对此不构成限定。
图7示出了本申请实施例的通信设备200的示意性框图。如图7所示，所述通信设备400为第一通信设备，所述通信设备400包括：
处理单元210，在所述第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，建立所述第一通信设备与所述第二通信设备之间的第二链路；
收发单元220，用于使用所述第二链路进行所述业务传输；
其中，所述第一链路和所述第二链路上的通信设备不同。
可选地，在本申请实施例中，在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为直连链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为第一网路链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备；或在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为第一网路链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备，所述第二链路为直连链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备。
可选地，在本申请实施例中，所述收发单元还用于：在所述第一链路无法进行业务传输的情况下，向所述第二通信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二通信设备建立所述第二链路。
可选地，在本申请实施例中，所述收发单元还用于：在所述第一链路无法进行业务传输的情况下，接收所述第二通信设备发送的第一指示信息；所述处理单元具体用于：响应于所述第一指示信息，建立所述第二链路。
可选地，在本申请实施例中，所述收发单元还用于：在所述第一通信设备完成所述第二链路的建立的情况下，向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据。
可选地，在本申请实施例中，所述收发单元还用于：接收所述第二通信设备发送的第二指示信息，所述第二指示信息用于指示所述第一通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据；所述收发单元具体用于：响应于所述第二指示信息，使用所述第二链路进行所述业务传输。
可选地，在本申请实施例中，所述第二指示信息用于指示在第一定时器超时的情况下结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示在所述第一定时器超时的情况下在所述第二链路上发送和接收数据。
可选地，在本申请实施例中，所述第一定时器在接收到所述第二指示信息时或发送所述第二指示信息的响应信息时启动。
可选地，在本申请实施例中，所述收发单元具体用于：响应于在所述第二链路上接收到的数据，使用所述第二链路进行所述业务传输。
可选地，在本申请实施例中，在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为中继链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备，所述第二链路为第二网路链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备；或在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为第二网路链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为中继链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备。
可选地，在本申请实施例中，所述收发单元还用于：接收所述中继设备发送的第三指示信息，所述第三指示信息用于指示所述中继链路无法进行业务传输。
可选地，在本申请实施例中，所述收发单元还用于：在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，通知所述网络设备删除所述中继链路；或在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，指示所述中继设备向所述网络设备发送所述中继链路的释放请求。
可选地，在本申请实施例中，所述处理单元还用于：在所述第一链路的链路质量差到满足第一条件的情况下，确定所述第一链路无法进行业务传输。
可选地，在本申请实施例中，所述处理单元具体用于：若所述第一链路的链路质量的测量值小于第一门限，确定所述第一链路无法进行业务传输。
可选地，在本申请实施例中，所述第一门限是由网络侧配置的或是基于待传输业务所对应的应用、服务质量QoS或协议数据单元PDU会话中的要求确定的。
应理解，根据本申请实施例的通信设备200可对应于本申请方法实施例中的第一通信设备，并且通信设备200中的各个单元的上述和其它操作和/或功能分别为了实现图4方法中终端设备的相应流程，为了简洁，在此不再赘述。
图8是本申请实施例提供的一种通信设备300示意性结构图。图8所示的通信设备300包括处理器310，处理器310可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图8所示，通信设备300还可以包括存储器320。其中，处理器310可以从存储器320中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器320可以是独立于处理器310的一个单独的器件，也可以集成在处理器310中。
可选地，如图8所示，通信设备300还可以包括收发器330，处理器310可以控制该收发器330与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器330可以包括发射机和接收机。收发器330还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备300具体可为本申请实施例的网络设备，并且该通信设备300可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备300具体可为本申请实施例的终端设备，并且该通信设备300可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
图9是本申请实施例的芯片的示意性结构图。图9所示的芯片400包括处理器410，处理器410可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图9所示，芯片400还可以包括存储器420。其中，处理器410可以从存储器420中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器420可以是独立于处理器410的一个单独的器件，也可以集成在处理器410中。
可选地，该芯片400还可以包括输入接口430。其中，处理器410可以控制该输入接口430与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片400还可以包括输出接口440。其中，处理器410可以控制该输出接口440与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的通信设备，并且该芯片可以实现本申请实施例的各个方法中由第一通信设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简 洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是 各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (35)

  1. 一种链路切换的方法，其特征在于，包括：
    在第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，所述第一通信设备建立所述第一通信设备与所述第二通信设备之间的第二链路；
    所述第一通信设备使用所述第二链路进行所述业务传输；
    其中，所述第一链路和所述第二链路上的通信设备不同。
  2. 根据权利要求1所述的方法，其特征在于，在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为直连链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为第一网路链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备；或
    在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为第一网路链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备，所述第二链路为直连链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    在所述第一链路无法进行业务传输的情况下，所述第一通信设备向所述第二通信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二通信设备建立所述第二链路。
  4. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    在所述第一链路无法进行业务传输的情况下，所述第一通信设备接收所述第二通信设备发送的第一指示信息；
    所述第一通信设备建立所述第一通信设备与所述第二通信设备之间的第二链路，包括：
    所述第一通信设备响应于所述第一指示信息，建立所述第二链路。
  5. 根据权利要求2至4中任一项所述的方法，其特征在于，所述方法还包括：
    在所述第一通信设备完成所述第二链路的建立的情况下，所述第一通信设备向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据。
  6. 根据权利要求2至4中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备接收所述第二通信设备发送的第二指示信息，所述第二指示信息用于指示所述第一通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据；
    所述第一通信设备使用所述第二链路进行所述业务传输，包括：
    所述第一通信设备响应于所述第二指示信息，使用所述第二链路进行所述业务传输。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第二指示信息用于指示在第 一定时器超时的情况下结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示在所述第一定时器超时的情况下在所述第二链路上发送和接收数据。
  8. 根据权利要求7所述的方法，其特征在于，所述第一定时器在接收到所述第二指示信息时或发送所述第二指示信息的响应信息时启动。
  9. 根据权利要求2至4中任一项所述的方法，其特征在于，所述第一通信设备使用所述第二链路进行所述业务传输，包括：
    所述第一通信设备响应于在所述第二链路上接收到的数据，使用所述第二链路进行所述业务传输。
  10. 根据权利要求1所述的方法，其特征在于，在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为中继链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备，所述第二链路为第二网路链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备；或
    在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为第二网路链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为中继链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备。
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备接收所述中继设备发送的第三指示信息，所述第三指示信息用于指示所述中继链路无法进行业务传输。
  12. 根据权利要求10或11所述的方法，其特征在于，所述方法还包括：
    在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，所述第一通信设备通知所述网络设备删除所述中继链路；或
    在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，所述第一通信设备指示所述中继设备向所述网络设备发送所述中继链路的释放请求。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述方法还包括：
    在所述第一链路的链路质量差到满足第一条件的情况下，所述第一通信设备确定所述第一链路无法进行业务传输。
  14. 根据权利要求13所述的方法，其特征在于，所述在所述第一链路的链路质量差到满足第一条件的情况下，所述第一通信设备确定所述第一链路无法进行业务传输，包括：
    若所述第一链路的链路质量的测量值小于第一门限，所述第一通信设备确定所述第一链路无法进行业务传输。
  15. 根据权利要求14所述的方法，其特征在于，所述第一门限是由网络侧配置的或是基于待传输业务所对应的应用、服务质量QoS或协议数据单元PDU会话中的要求确定的。
  16. 一种通信设备，其特征在于，所述通信设备为第一通信设备，所述通信设备包 括：
    处理单元，在所述第一通信设备与第二通信设备之间的第一链路无法进行业务传输的情况下，建立所述第一通信设备与所述第二通信设备之间的第二链路；
    收发单元，用于使用所述第二链路进行所述业务传输；
    其中，所述第一链路和所述第二链路上的通信设备不同。
  17. 根据权利要求16所述的通信设备，其特征在于，在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为直连链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为第一网路链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备；或
    在所述第一通信设备和所述第二通信设备均为终端设备时，所述第一链路为第一网路链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及网络设备，所述第二链路为直连链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备。
  18. 根据权利要求17所述的通信设备，其特征在于，所述收发单元还用于：
    在所述第一链路无法进行业务传输的情况下，向所述第二通信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二通信设备建立所述第二链路。
  19. 根据权利要求17所述的通信设备，其特征在于，所述收发单元还用于：
    在所述第一链路无法进行业务传输的情况下，接收所述第二通信设备发送的第一指示信息；
    所述处理单元具体用于：
    响应于所述第一指示信息，建立所述第二链路。
  20. 根据权利要求17至19中任一项所述的通信设备，其特征在于，所述收发单元还用于：
    在所述第一通信设备完成所述第二链路的建立的情况下，向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据。
  21. 根据权利要求17至19中任一项所述的通信设备，其特征在于，所述收发单元还用于：
    接收所述第二通信设备发送的第二指示信息，所述第二指示信息用于指示所述第一通信设备结束在所述第一链路上发送和接收数据，和/或，所述第二指示信息用于指示所述第二通信设备在所述第二链路上发送和接收数据；
    所述收发单元具体用于：
    响应于所述第二指示信息，使用所述第二链路进行所述业务传输。
  22. 根据权利要求20或21所述的通信设备，其特征在于，所述第二指示信息用于指示在第一定时器超时的情况下结束在所述第一链路上发送和接收数据，和/或，所述第 二指示信息用于指示在所述第一定时器超时的情况下在所述第二链路上发送和接收数据。
  23. 根据权利要求22所述的通信设备，其特征在于，所述第一定时器在接收到所述第二指示信息时或发送所述第二指示信息的响应信息时启动。
  24. 根据权利要求17至19中任一项所述的通信设备，其特征在于，所述收发单元具体用于：
    响应于在所述第二链路上接收到的数据，使用所述第二链路进行所述业务传输。
  25. 根据权利要求16所述的通信设备，其特征在于，在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为中继链路且所述第一链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备，所述第二链路为第二网路链路且所述第二链路上的通信设备包括所述第一通信设备和所述第二通信设备；或
    在所述第一通信设备为终端设备以及所述第二通信设备为网络设备时，所述第一链路为第二网路链路且所述第一链路上的通信设备包括所述第一通信设备和所述第二通信设备，所述第二链路为中继链路且所述第二链路上的通信设备包括所述第一通信设备、所述第二通信设备以及中继设备。
  26. 根据权利要求25所述的通信设备，其特征在于，所述收发单元还用于：
    接收所述中继设备发送的第三指示信息，所述第三指示信息用于指示所述中继链路无法进行业务传输。
  27. 根据权利要求25或26所述的通信设备，其特征在于，所述收发单元还用于：
    在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，通知所述网络设备删除所述中继链路；或
    在所述第一通信设备使用所述第二链路进行所述业务传输的情况下，指示所述中继设备向所述网络设备发送所述中继链路的释放请求。
  28. 根据权利要求16至27中任一项所述的通信设备，其特征在于，所述处理单元还用于：
    在所述第一链路的链路质量差到满足第一条件的情况下，确定所述第一链路无法进行业务传输。
  29. 根据权利要求28所述的通信设备，其特征在于，所述处理单元具体用于：
    若所述第一链路的链路质量的测量值小于第一门限，确定所述第一链路无法进行业务传输。
  30. 根据权利要求29所述的通信设备，其特征在于，所述第一门限是由网络侧配置的或是基于待传输业务所对应的应用、服务质量QoS或协议数据单元PDU会话中的要求确定的。
  31. 一种通信设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1 至15中任一项所述的方法。
  32. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至15中任一项所述的方法。
  33. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至15中任一项所述的方法。
  34. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至15中任一项所述的方法。
  35. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至15中任一项所述的方法。
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