WO2021081818A1 - 小区切换的管理方法、设备及存储介质 - Google Patents

小区切换的管理方法、设备及存储介质 Download PDF

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Publication number
WO2021081818A1
WO2021081818A1 PCT/CN2019/114398 CN2019114398W WO2021081818A1 WO 2021081818 A1 WO2021081818 A1 WO 2021081818A1 CN 2019114398 W CN2019114398 W CN 2019114398W WO 2021081818 A1 WO2021081818 A1 WO 2021081818A1
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WIPO (PCT)
Prior art keywords
communication node
cell
reference clock
information
clock information
Prior art date
Application number
PCT/CN2019/114398
Other languages
English (en)
French (fr)
Inventor
付喆
刘建华
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 CN201980101946.8A priority Critical patent/CN115244988A/zh
Priority to EP19950532.2A priority patent/EP4054243A4/en
Priority to PCT/CN2019/114398 priority patent/WO2021081818A1/zh
Publication of WO2021081818A1 publication Critical patent/WO2021081818A1/zh
Priority to US17/731,842 priority patent/US20220256408A1/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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • 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
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/249—Reselection being triggered by specific parameters according to timing information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2416—Real-time traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/28—Flow control; Congestion control in relation to timing considerations
    • H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover

Definitions

  • the embodiments of the present application relate to communication technologies, and in particular, to a management method, device, and storage medium for cell handover.
  • 5G communication systems can be used to transmit industrial automation (Factory automation), transmission automation (Transport Industry), intelligent power (Electrical Power Distribution) and other services. Since this service has high requirements for low latency and reliable transmission, the concept of Time Sensitive Networking (TSN) or Time Sensitive Conveying (TSC) is introduced in IIoT.
  • TSN Time Sensitive Networking
  • TSC Time Sensitive Conveying
  • the terminal device may switch from one cell, the source cell, to another cell, the target cell. If the target cell cannot meet high time synchronization accuracy, it will result in the TSN service or TSC service transmitted by the terminal device.
  • the delay is relatively large, or the quality of service (Quality of Service, QoS) of the TSN service or TSC service transmitted by the terminal device decreases.
  • QoS Quality of Service
  • the embodiments of the present application provide a management method, device and storage medium for cell handover to avoid the TSN service or TSC service delay caused when the terminal device is randomly handed over to a target cell and the target cell does not meet the TSN or TSC clock requirements Increase or decrease in QoS.
  • the embodiments of the present application may provide a cell handover management method, which includes:
  • the first communication node receives reference clock information from the designated node
  • the first communication node determines a target cell that meets preset conditions, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the second communication node and the The first communication node is connected, and the first communication node belongs to the source cell.
  • the embodiments of the present application may provide a cell handover management method, which includes:
  • the network device corresponding to the candidate cell sends reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a handover of the second communication node from the source cell to the target cell
  • the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • the embodiments of the present application may provide a cell handover management method, which includes:
  • the terminal device sends reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a handover procedure for the second communication node to switch from the source cell to the target cell , Wherein the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • the embodiments of the present application may provide a cell handover management method, which includes:
  • the first communication node detects the reference clock information stored locally, and/or, the first communication node sends a first request message to the third communication node, where the first request message is used to request the third communication node to feed back the reference Clock information
  • the first communication node determines a target cell that meets preset conditions, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the first communication node Belonging to the source cell, the second communication node is connected to the first communication node.
  • the embodiments of the present application may provide a cell handover management method, which includes:
  • the third communication node receives the first request message sent by the first communication node, where the first request message is used to request the third communication node to feed back reference clock information, and the reference clock information is used for the first communication
  • the node determines the target cell that meets the preset conditions, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, where the first communication node belongs to the source cell, and the second communication node and the The first communication node is connected.
  • an embodiment of the present application may provide a first communication node, which is characterized in that it includes:
  • the receiving module is used to receive the reference clock information from the designated node
  • the determining module is configured to determine a target cell that meets preset conditions according to the reference clock information, and initiate a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the second communication node and the second communication node A communication node is connected, and the first communication node belongs to the source cell.
  • the embodiments of the present application may provide a network device corresponding to a candidate cell, including:
  • a determining module configured to determine the reference clock information sent to the first communication node
  • the sending module is configured to send reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a handover of the second communication node from the source cell to the target cell In the handover procedure, the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • embodiments of the present application may provide a terminal device, including:
  • a determining module configured to determine the reference clock information sent to the first communication node
  • the sending module is configured to send reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a handover of the second communication node from the source cell to the target cell In the handover procedure, the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • an embodiment of the present application may provide a first communication node, including: a detection module and/or a sending module, and a determination module;
  • the detection module is used to detect the reference clock information stored locally
  • the sending module is configured to send a first request message to a third communication node, where the first request message is used to request the third communication node to feed back reference clock information;
  • the determining module is configured to determine a target cell that meets preset conditions according to the acquired reference clock information, and initiate a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the first communication node Belonging to the source cell, the second communication node is connected to the first communication node.
  • an embodiment of the present application may provide a third communication node, which is characterized in that it includes:
  • the receiving module is configured to receive a first request message sent by a first communication node, where the first request message is used to request the third communication node to feed back reference clock information, and the reference clock information is used for the first
  • the communication node determines the target cell that meets the preset conditions, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the first communication node belongs to the source cell, and the second communication node is connected to the target cell.
  • the first communication node is connected;
  • the sending module is configured to send the feedback reference clock information to the first communication node.
  • an embodiment of the present application may provide a first communication node, including:
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell handover management method according to the first aspect or the fourth aspect.
  • the embodiments of the present application may provide a network device corresponding to a candidate cell, including:
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell handover management method as described in the second aspect.
  • the embodiments of the present application may provide a terminal device, including:
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell handover management method as described in the third aspect.
  • embodiments of the present application may provide a third communication node, including:
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the cell handover management method according to the fifth aspect.
  • an embodiment of the present application provides a computer-readable storage medium having computer-executable instructions stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the ,
  • the second aspect, the third aspect, the fourth aspect, or the fifth aspect of the cell handover management method are used to implement the .
  • an embodiment of the present application provides a chip, including: a processor, configured to call and run a computer program from a memory, so that the device installed with the chip can perform operations such as the first aspect, the second aspect, and the third aspect.
  • a processor configured to call and run a computer program from a memory, so that the device installed with the chip can perform operations such as the first aspect, the second aspect, and the third aspect.
  • an embodiment of the present application provides a computer program product, including computer program instructions, which cause a computer to execute as described in the first, second, third, fourth, or fifth aspect Management method for cell handover.
  • embodiments of the present application also provide a computer program that enables a computer to execute the cell handover management method described in the first, second, third, fourth, or fifth aspect above .
  • the network device in the source cell determines that it meets the requirements based on the reference clock information received from the designated node.
  • the target cell with a preset condition further, the terminal device is switched from the source cell to the target cell, where the preset condition may be a preset condition that satisfies the TSN or TSC clock requirements, that is, when the target cell satisfies the TSN or When the TSC clock requires, you can switch the terminal equipment from the source cell to the target cell to avoid the terminal equipment being randomly switched to a target cell, and the target cell does not meet the TSN or TSC clock requirements, which causes the TSN service or TSC service delay Increase or decrease in QoS.
  • the preset condition may be a preset condition that satisfies the TSN or TSC clock requirements, that is, when the target cell satisfies the TSN or When the TSC clock requires, you can switch the terminal equipment from the source cell to the target cell to avoid the terminal equipment being randomly switched to a target cell, and the target cell does not meet the TSN or TSC clock requirements, which causes the TSN service or TSC service delay Increase or decrease in QoS.
  • Fig. 1 is a schematic diagram of a communication system provided by this application.
  • FIG. 2 is a schematic diagram of another communication system provided by this application.
  • FIG. 3 is a schematic diagram of another communication system provided by this application.
  • Fig. 4 is a flowchart of a cell handover management method provided by this application.
  • FIG. 5 is a signaling diagram of another cell handover management method provided by this application.
  • FIG. 6 is a signaling diagram of another cell handover management method provided by this application.
  • FIG. 7 is a signaling diagram of another cell handover management method provided by this application.
  • FIG. 8 is a signaling diagram of yet another cell handover management method provided by this application.
  • FIG. 9 is a schematic diagram of another communication system provided by this application.
  • Figure 10 is a signaling diagram of yet another cell handover management method provided by this application.
  • FIG 11 is a signaling diagram of yet another cell handover management method provided by this application.
  • FIG. 12 is a schematic structural diagram of the first communication node provided by this application.
  • FIG. 13 is a schematic structural diagram of a network device corresponding to a candidate cell provided by this application.
  • FIG. 14 is a schematic structural diagram of a terminal device provided by this application.
  • FIG. 15 is a schematic diagram of a structure of the first communication node provided by this application.
  • FIG. 16 is a schematic structural diagram of a third communication node provided by this application.
  • FIG. 17 is a schematic diagram of another structure of the first communication node provided by this application.
  • FIG. 18 is a schematic diagram of another structure of a network device corresponding to a candidate cell provided by this application.
  • FIG. 19 is a schematic diagram of another structure of the terminal device provided by this application.
  • FIG. 20 is a schematic diagram of another structure of the third communication node provided by this application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NR NR system evolution system
  • LTE on unlicensed frequency bands LTE-based access to unlicensed spectrum, LTE-U
  • NR NR-based access to unlicensed spectrum, NR-U
  • UMTS Universal Mobile Telecommunication System
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX Wireless Local Area Networks
  • WLAN Wireless Fidelity
  • WiFi next-generation communication systems or other communication systems, etc.
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 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 in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, WLANs, digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or another A terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) devices.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • direct cable connection And/or another data connection/network
  • a wireless interface such as for cellular networks, WLANs, digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or another A terminal device that is set to
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet Personal Digital Assistant (PDA) equipment with Internet access, Web browser, notebook, calendar, and/or Global Positioning System (GPS) receiver; and regular laptop and/or palmtop Receiver or other electronic device including a radio telephone transceiver.
  • PCS Personal Communications System
  • PDA Internet/intranet Personal Digital Assistant
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or 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 PDA device, a handheld device with wireless communication function, a computing device or Other processing equipment connected to the wireless modem, in-vehicle equipment, wearable equipment, terminal equipment in the 5G network, or terminal equipment in the future evolution of the PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • D2D communication may be performed between the terminal devices 120.
  • the 5G system may also be referred to as an NR system, or the 5G network may also be referred to as an NR network.
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the network device can be an access device, for example, it can be an access device in an NR-U system, such as a 5G NR base station (next generation Node B, gNB) or a small station, a micro station, or a relay station. , Transmission and Reception Point (TRP), Road Side Unit (RSU), etc.
  • a 5G NR base station node B, gNB
  • TRP Transmission and Reception Point
  • RSU Road Side Unit
  • a terminal device may also be called a mobile terminal, UE, access terminal, subscriber unit, subscriber station, mobile station, mobile station, user terminal, terminal, wireless communication device, user agent, or user device.
  • a terminal device can be a smart phone, a cellular phone, a cordless phone, a PDA device, a handheld device with wireless communication function, or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, etc.
  • the terminal device has an interface for communicating with a network device (for example, a cellular network).
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 having a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiment of the present application.
  • the method of the embodiment of the present application can be applied to the communication system as shown in FIG. 1 and can also be applied to other communication scenarios.
  • the cell involved in the embodiments of this application is also called a cell, which refers to an area covered by a base station in a cellular mobile communication system, or a part of a base station, such as an area covered by a sector antenna.
  • the cell may be an omnidirectional cell covered by the omnidirectional antenna of the base station, or a sector covered by the directional antenna of the base station.
  • an omnidirectional cell is used as an example for schematic description.
  • the terminal device may switch from one cell, that is, the source cell, to another cell, that is, the target cell.
  • the source base station 21 is the base station to which the terminal device 20 in the source cell 31 is connected.
  • the terminal device 20 needs to switch to another cell, such as the target cell 32.
  • the terminal device 20 is a terminal device that needs to transmit or is transmitting TSN or TSC services
  • the target cell 32 is a cell that does not meet the TSN or TSC clock requirements
  • this embodiment provides a cell handover management method. The following describes the cell handover management method in conjunction with specific embodiments.
  • the first communication node may be a source network device corresponding to the source cell, for example, a source base station in the source cell.
  • the second communication node may be a terminal device, the terminal device may be a terminal device that supports TSN service or TSC service, or the terminal device may be a terminal device with TSN service or TSC service transmission capability, or the terminal device is performing TSN service Or TSC service transmission, or the terminal device is ready to perform TSN service or TSC service transmission.
  • the third communication node may be at least one of a core network element, an Operation Administration and Maintenance (OAM) network element, and a central network control (CNC) network element, where the core network element is specific It can be an Access and Mobility Management Function (AMF) network element.
  • OF Operation Administration and Maintenance
  • CNC central network control
  • the fourth communication node may be a target network device corresponding to the target cell, for example, a target base station in the target cell.
  • the network device corresponding to the candidate cell may also be recorded as the fifth communication node.
  • the target cell may be determined from the candidate cell. Therefore, when the candidate cell is the target cell, the first The fourth communication node and the fifth communication node may be the same communication node. When the candidate cell is not the target cell, the fourth communication node and the fifth communication node may be different communication nodes.
  • the designated node may be a network device corresponding to at least one candidate cell. In other scenarios, the designated node may be a terminal device.
  • the communication system to which the cell handover management method provided in the embodiments of the present application is applicable may include OAM network elements, CNC network elements, or AMF network elements, or may not include OAM network elements, CNC network elements, or AMF network elements.
  • the source base station can obtain reference clock information from the OAM network element, CNC network element, or AMF network element, or the source base station can also obtain the reference locally Clock information, and further, determine a target cell that meets a preset condition according to the reference clock information, and initiate a handover procedure for the terminal device to switch from the source cell to the target cell.
  • the source base station can obtain reference clock information from the designated node, and further, determine the target cell that meets the preset conditions based on the reference clock information, and initiate the terminal The handover procedure of the device from the source cell to the target cell.
  • the management method for cell handover will be introduced below in conjunction with a schematic diagram of a specific communication system.
  • the cell where the terminal device 20 is currently located is the source cell 31
  • the source base station 21 is a network device corresponding to the source cell 31
  • the terminal device 20 is currently in communication connection with the source base station 21.
  • the cell 32, the cell 33, and the cell 34 are respectively adjacent cells of the source cell 31
  • the base station 23 is the network equipment corresponding to the cell 33
  • the base station 24 is the network equipment corresponding to the cell 34.
  • Candidate cells can be neighboring cells, or part of neighboring cells.
  • Fig. 4 is a flowchart of a cell handover management method provided by this application. As shown in Figure 4, the management method for cell handover includes the following steps:
  • the first communication node receives reference clock information from a designated node.
  • the first communication node determines a target cell that meets a preset condition, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the second communication node and The first communication node is connected, and the first communication node belongs to the source cell.
  • the first communication node is, for example, the source base station 21 shown in FIG. 3.
  • the designated node may be a network device corresponding to at least one candidate cell. For example, if the candidate cell is a neighboring cell of the source cell 31, the designated nodes are the base station 22, the base station 23, and the base station 24. If the candidate cell is part of the nodes in the neighboring cells, for example, the candidate cells are the cell 32 and the cell 33, the designated nodes are the base station 22 and the base station 23. In addition, the designated node may also be the terminal device 20.
  • the designated node may send the reference clock information to the source base station 21, and correspondingly, the source base station 21 receives the reference clock information, and further determines the target cell that meets the preset conditions according to the reference clock information, and initiates the terminal device 20 A handover procedure for handover from the source cell 31 to the target cell.
  • the corresponding reference clock information may be the reference clock information of cell 32, the reference clock information of cell 33, and the cell 34 reference clock information. That is, the source base station 21 can determine the target cell in the cell 32, the cell 33, and the cell 34 that meets the preset conditions according to the reference clock information corresponding to the cell 32, the cell 33, and the cell 34, respectively.
  • the corresponding reference clock information may be the measurement result of the terminal device 20 after measuring at least one candidate cell. That is, the source base station 21 can determine the target cell that meets the preset condition among the at least one candidate cell according to the measurement result of the terminal device 20.
  • the network device in the source cell determines the target cell that meets the preset conditions according to the reference clock information received from the designated node Further, the terminal device is switched from the source cell to the target cell, where the preset condition may be a preset condition that satisfies the TSN or TSC clock requirement, that is, when the target cell satisfies the TSN or TSC clock requirement,
  • the preset condition may be a preset condition that satisfies the TSN or TSC clock requirement, that is, when the target cell satisfies the TSN or TSC clock requirement
  • the terminal equipment can be handed over from the source cell to the target cell, avoiding the terminal equipment being randomly handed over to a target cell, and the target cell does not meet the TSN or TSC clock requirements, which causes the TSN service or TSC service delay increase or QoS decrease problem.
  • the designated node may actively send the reference clock information to the source base station 21. It may also be that after the source base station 21 sends an instruction message to the designated node, the designated node sends reference clock information to the source base station 21 according to the instruction message, that is, the instruction message can be used to instruct the designated node to send the source base station 21 to the source base station 21.
  • the reference clock information is fed back.
  • FIG. 5 is a signaling diagram of a cell handover management method provided by this application, where the designated node is a network device corresponding to at least one candidate cell, for example, base station 22 and base station 23.
  • the management method for cell handover includes the following steps:
  • the source base station 21 sends an indication message to the base station 22, where the indication message is used to instruct the base station 22 to feed back reference clock information corresponding to the cell 32.
  • the base station 22 sends the reference clock information corresponding to the cell 32 to the source base station 21, and correspondingly, the source base station 21 receives the reference clock information.
  • the source base station 21 sends an indication message to the base station 23, where the indication message is used to instruct the base station 23 to feed back the reference clock information corresponding to the cell 33.
  • the base station 23 sends the reference clock information corresponding to the cell 33 to the source base station 21, and correspondingly, the source base station 21 receives the reference clock information.
  • the source base station 21 determines the target cell according to the reference clock information corresponding to the cell 32 and the cell 33 respectively.
  • the source base station 21 sends a handover instruction to the terminal device.
  • the terminal device After receiving the switching instruction, the terminal device executes the air interface switching process. For example, the terminal device sends a random access procedure to the target base station in the target cell, and the terminal device is disconnected from the source base station, and entities such as the Packet Data Convergence Protocol (PDCP) of the terminal device are re-established.
  • the source base station may also send serial number status transfer (SN STATUS TRANSFER) information to the target base station, which is used to indicate the uplink PDCP serial number (Serial Number, SN) receiving status and the downlink PDCP SN sending status.
  • serial number status transfer SN STATUS TRANSFER
  • the target base station When the terminal device successfully accesses the target base station, that is, after the random access is successful, the target base station sends a path switch request (PATH SWITCH REQUEST) to the Mobility Management Entity (MME) network element, which is used to request the MME to switch the downlink path After the path switching is completed, the target base station instructs the source base station to release the context of the terminal device, thereby completing the cell switching of the terminal device.
  • PATH SWITCH REQUEST Policy and Control Entity
  • S503 may be before S501
  • S504 may be before S502.
  • the reference clock information may include at least one of the following: reference clock information of a time-sensitive network TSN clock, reference clock information of a time-sensitive transmission TSC clock, time Reference clock information of a high-precision clock whose accuracy meets the preset accuracy threshold.
  • the reference clock information may include at least one of the following: reference system frame number (System Frame Number, SFN), TSC clock domain (TSC domain index), TSN clock domain (TSN domain) index), time (for example, 10:9: 8 seconds, 10 milliseconds, 1 microsecond), clock precision value (for example, 1 millisecond, 10 nanoseconds, 1 microsecond), clock precision type (for example, low precision, normal precision, High-precision, etc.) indication information, time information type (timeInfoType), and uncertainty (uncertainty).
  • reference system frame number System Frame Number, SFN
  • TSC domain index TSC clock domain index
  • TSN clock domain TSN clock domain index
  • time for example, 10:9: 8 seconds, 10 milliseconds, 1 microsecond
  • clock precision value for example, 1 millisecond, 10 nanoseconds, 1 microsecond
  • clock precision type for example, low precision, normal precision, High-precision, etc.
  • the reference clock information of a cell may also be the difference between the reference SFN of the cell and the reference SFN of the neighboring cells of the cell, the difference between the clock accuracy value of the cell and the clock accuracy of the neighboring cells of the cell. At least one of the difference, the difference between the time of the cell and the time of the neighboring cells of the cell.
  • the indication information of the clock accuracy type may be a 3-bit information bit.
  • One microsecond is the normal accuracy, a precision higher than 1 microsecond, for example, 10 nanoseconds, is a high precision, and a precision lower than 1 microsecond, for example, 1 millisecond is a low precision.
  • Table 1 the corresponding relationship between high precision, low precision or normal precision and the 3 bits can be shown in Table 1 below:
  • the source base station 21 may determine the clock in the cell 32 and the cell 33 according to the reference clock information corresponding to the cell 32 and the cell 33 respectively.
  • a candidate cell whose accuracy is higher than a preset accuracy threshold or whose clock accuracy is the same as that of the source cell is used as the target cell. That is, the above-mentioned preset condition may specifically be that the clock accuracy is higher than or equal to the preset accuracy threshold, or the above-mentioned preset condition may specifically be that the clock accuracy is higher than or equal to the clock accuracy of the source cell.
  • the reference clock information is specifically a clock precision value, and the clock precision value may also be referred to as the granularity of clock synchronization precision.
  • the clock accuracy of cell 32 is 10 nanoseconds
  • the clock accuracy of cell 33 is 1 millisecond
  • the preset accuracy threshold is 1 microsecond. That is to say, the clock accuracy of cell 32 is higher than the preset accuracy threshold.
  • the accuracy of the clock is lower than the preset accuracy threshold.
  • the cell 32 whose clock accuracy is higher than the preset accuracy threshold may be used as the target cell.
  • the clock accuracy of the source cell is 1 microsecond. It can be seen that the clock accuracy of cell 32 is higher than that of the source cell, and the clock accuracy of cell 33 is lower than that of the source cell. The clock accuracy can be higher than that of the source cell.
  • the cell 32 of the clock accuracy is used as the target cell.
  • multiple cells may meet preset conditions.
  • the clock accuracy of cell 32 and the clock accuracy of cell 33 are both higher than the preset accuracy threshold, or both are higher than the clock accuracy of the source cell.
  • several possible implementations can be used to determine the target cell to which the terminal device can be handed over from the multiple target cells.
  • the cell with the highest clock accuracy among multiple target cells may be used as the target cell to which the terminal device can be handed over.
  • the cell with the best channel quality among multiple target cells may be used as the target cell to which the terminal device can be handed over.
  • the number of acceptable bearers or the cell with the largest number of guaranteed bearers among multiple target cells can be used as the target cell to which the terminal device can handover, where the number of acceptable bearers may specifically be an acceptable guarantee
  • the number of bit rate (Guaranteed Bit Rate, GBR) bearers, and the guaranteed number of bearers may specifically be the guaranteed number of GBR bearers.
  • the cell with the smallest load among multiple target cells may be used as the target cell to which the terminal device can be handed over. It is understandable that the descriptions here are only a few examples, and the target cell to which the terminal device can be handed over can also be determined from multiple target cells through other preset rules.
  • the source base station may determine that the clock accuracy of the at least one candidate cell is lower than the preset accuracy threshold or both are lower than the clock accuracy of the source cell .
  • the source base station may determine that the clock accuracy of the at least one candidate cell is different from the preset accuracy threshold or both are different from the clock accuracy of the source cell. In this case, the source base station may pass the following possibilities Way to determine the target cell.
  • the source base station uses a cell with a channel quality greater than a preset quality threshold among the at least one candidate cell as the target cell.
  • the source base station determines the target cell according to pre-configuration.
  • Another possible manner is that the source base station uses the cell with the highest clock accuracy among the at least one candidate cell as the target cell.
  • Another possible way is that the source base station determines that the handover fails, and further releases the connection with the terminal device.
  • Another possible manner is that the source base station selects one candidate cell from the at least one candidate cell as the target cell.
  • some network equipment corresponding to the candidate cells may feed back the reference clock information of the corresponding candidate cell to the source base station, but the network equipment corresponding to some candidate cells
  • the reference clock information of the corresponding candidate cell may not be fed back.
  • the base station 22 feeds back the reference clock information of the cell 32
  • the base station 23 feeds back the reference clock information of the cell 33
  • the base station 24 does not feed back the cell 34.
  • the source base station 21 can ignore the reference clock information of the cell 34 when determining the target cell, according to the reference clock information of the cell 32 and the reference clock of the cell 33 Information to determine the target cell, for example, the source base station 21 can determine the clock accuracy of the cell 32 according to the reference clock information of the cell 32, determine the clock accuracy of the cell 33 according to the reference clock information of the cell 33, and further, according to the clock accuracy and the clock accuracy of the cell 32
  • the clock accuracy of cell 33 determines the priority order of cell 32 and cell 33 being selected as the target cell. If the clock accuracy of cell 32 is higher than the clock accuracy of cell 33, a priority order is that the priority of cell 32 is higher than that of cell 33. The priority of the cell 33, another priority order is that the priority of the cell 33 is higher than the priority of the cell 32.
  • the source base station 21 may determine that the cell 34 is not the target cell.
  • the source base station sends an indication message to the network device corresponding to at least one candidate cell.
  • the indication message is used to instruct the network device corresponding to the at least one candidate cell to send the corresponding candidate to the source base station.
  • the reference clock information of the cell the source base station further determines, according to the reference clock information of the at least one candidate cell, a candidate cell whose clock accuracy is higher than a preset accuracy threshold or the same as the source cell's clock accuracy as the target cell, so that the The target cell can meet the clock requirements of the TSN or TSC, avoiding the problem of increased delay or decreased QoS of the TSN service or the TSC service.
  • the source base station may also send the handover request message to the network device corresponding to the at least one candidate cell.
  • the source base station receives the handover response information fed back by the network device corresponding to at least one candidate cell, and the handover response information is Acknowledge Character (ACK), the source base station sends an indication message to the network device corresponding to the at least one candidate cell .
  • ACK Acknowledge Character
  • the management method for cell handover includes the following steps:
  • the source base station 21 sends a handover request message to the base station 22, and the handover request message requests the base station 22 to feed back the handover response information of the terminal device handing over from the source cell to the cell 32.
  • the base station 22 sends handover response information to the source base station 21, where the handover response information is ACK, and correspondingly, the source base station 21 receives the handover response information.
  • the source base station 21 sends a handover request message to the base station 23, and the handover request message requests the base station 23 to feed back the handover response information of the terminal device handover from the source cell to the cell 33.
  • the base station 23 sends handover response information to the source base station 21, where the handover response information is ACK, and correspondingly, the source base station 21 receives the handover response information.
  • the source base station 21 sends an indication message to the base station 22, where the indication message is used to instruct the base station 22 to feed back the reference clock information corresponding to the cell 32.
  • the base station 22 sends the reference clock information corresponding to the cell 32 to the source base station 21, and correspondingly, the source base station 21 receives the reference clock information.
  • the source base station 21 sends an indication message to the base station 23, where the indication message is used to instruct the base station 23 to feed back the reference clock information corresponding to the cell 33.
  • the base station 23 sends the reference clock information corresponding to the cell 33 to the source base station 21, and correspondingly, the source base station 21 receives the reference clock information.
  • the source base station 21 determines the target cell according to the reference clock information corresponding to the cell 32 and the cell 33 respectively.
  • the source base station 21 sends a handover instruction to the terminal device.
  • S607 may be before S605, and S608 may be before S606.
  • S605 may be executed after S602, and S607 may be executed after S604.
  • the base station 22 when the base station 22 receives the handover request message, the base station 22 performs handover judgment, that is, access control. Specifically, the base station 22 can base on the number of bearers that the cell 32 can accept and the guaranteed bearers The number, the channel quality of the cell 32, the load condition of the cell 32, etc. determine whether the terminal device can be handed over to the cell 32. If the base station 22 determines that the terminal device can be handed over to the cell 32, it sends handover response information to the source base station 21 , The handover response information is ACK. If the base station 22 determines that the cell 32 cannot receive the terminal device, it sends handover response information to the source base station 21, where the handover response information is negative ACKnowledgment (NACK). The method for the base station 23 to send the handover response information to the source base station 21 is similar to this, and will not be repeated here.
  • NACK negative ACKnowledgment
  • the source base station 21 will not need to send an indication message to the base station 22.
  • the handover response information sent by the base station 23 to the source base station 21 is NACK, then in subsequent steps, such as in S607, the source base station 21 will not need to send an indication message to the base station 23.
  • the source base station 21 sends the handover request message to the base station 22 and the base station 23 After sending the handover request messages respectively, the handover response information fed back by the base station 22 and the base station 23 are both NACK.
  • the source base station 21 can continue to determine at least one new candidate cell.
  • the cell 34 can be used as a candidate cell, and further, The base station 24 sends a handover request message.
  • the cell 34 can be used as the target cell, and the terminal device 20 can be handed over from the source cell 31 to The target cell 34.
  • the source base station may disregard the reference clock information of the candidate cell and select a candidate cell that feeds back ACK for handover.
  • the source base station may disregard the reference clock information of cell 34.
  • the source base station 21 can disconnect the terminal device from the source base station 21, or the source base station 21. Regardless of the reference clock information, a cell that feeds back the ACK can be selected for handover.
  • the source base station before the source base station sends an instruction message to the network device corresponding to at least one candidate cell, the source base station sends a handover request message to the network device corresponding to at least one candidate cell.
  • the source base station receives the handover response information fed back by the network equipment corresponding to at least one candidate cell, and the handover response information is ACK, the source base station sends an indication message to the network equipment corresponding to at least one candidate cell, and if a certain candidate cell feeds back If the handover response information is NACK, the source base station does not send the indication message to the network device corresponding to the candidate cell, thereby saving the resource overhead of the source base station for sending the indication message.
  • the instruction message sent by the source base station to the network device corresponding to at least one candidate cell may also be carried in the handover request message.
  • the reference clock information of the at least one candidate cell fed back by the network device corresponding to the at least one candidate cell may be carried in the handover response information.
  • the source base station 21 sends a handover request message to the base station 22, and the handover request message includes an indication message.
  • the meanings of the handover request message and the indication message are specifically as described above. I won't repeat it here.
  • the source base station 21 sends a handover request message to the base station 23, and the handover request message includes an indication message.
  • the base station 22 sends handover response information to the source base station 21, and the handover response information includes reference clock information corresponding to the cell 32.
  • the base station 23 sends handover response information to the source base station 21, and the handover response information includes the reference clock information corresponding to the cell 33.
  • the meanings of the switching response information and the reference clock information are specifically as described above, and will not be repeated here.
  • the indication message is carried by the handover request message sent by the source base station to the network equipment corresponding to at least one candidate cell, and the handover response information fed back by the network equipment corresponding to the at least one candidate cell is carried.
  • Reference clock information further saves resource overhead.
  • the source base station may not carry the indication message in the handover request message, but the network device corresponding to the at least one candidate cell may feed back the reference clock information of the at least one candidate cell in the handover response information.
  • the source base station 21 sends an instruction message to the base station 22, and the instruction message is not carried in the handover request message.
  • the base station 22 sends handover response information to the source base station 21, and the base station 22 feeds back the reference clock information corresponding to the cell 32 in the handover response information by itself, that is, the handover request message does not carry the indication message, and the handover response information carries the reference Clock information.
  • this method is also applicable to S503 and S504, which will not be repeated here.
  • the source base station may send an indication message to the network device corresponding to at least one candidate cell, and determine the target cell based on the reference clock information corresponding to the at least one candidate cell fed back by the network device corresponding to the at least one candidate cell, Send a handover request message to the network device corresponding to the target cell, and when the handover response information fed back by the network device corresponding to the target cell is ACK, the source base station sends a handover instruction to the terminal device. As shown in FIG. 7, based on FIG.
  • the source base station 21 determines that the target cell is cell 32 according to the designated reference clock information corresponding to cell 32 and cell 33, in S506, the source base station 21 A handover request message is sent to the base station 22 to request the base station 22 to feed back the handover response information of the terminal device handover from the source cell to the cell 32. If in S507, the handover response information that the base station 22 feeds back to the source base station 21 is an ACK, then further, in S508, the source base station 21 sends a handover instruction to the terminal device. That is, if in S507, the handover response information that the base station 22 feeds back to the source base station 21 is NACK, the source base station 21 also needs to re-determine the target cell.
  • the source base station 21 when the source base station 21 sends a handover request message to the network equipment corresponding to the candidate cell or the network equipment corresponding to the target cell, the source base station 21 may also carry the reference clock information of the source cell 31 in the handover.
  • the request message when the network device corresponding to the candidate cell or the network device corresponding to the target cell receives the handover request message, it can be determined according to the reference clock information of the source cell 31 whether the clock accuracy of the candidate cell or the target cell is consistent with that of the source cell.
  • the clock accuracy of the cell 31 is the same, or it is determined whether the candidate cell or the target cell can accept the handover of the terminal device UE according to the reference clock information of the source cell 31.
  • the network device corresponding to the candidate cell or target cell determines that the TSN service or the TSC service can be transmitted, and further, determines that the handover response information fed back to the source base station is ACK.
  • the network device corresponding to the candidate cell or the network device corresponding to the target cell determines that the TSN service or TSC service cannot be transmitted normally, thereby determining that the terminal device cannot Switch to the candidate cell or the target cell, or determine that the access control fails, or not send handover response information, or determine that the handover response information fed back to the source base station is NACK. It is understandable that if the target base station is a candidate cell or a network device in the target cell, the target base station can also feed back the reference clock information of the candidate cell or the target cell to the source base station, and the source base station will use the reference clock information of the candidate cell or the target cell. Clock information to determine whether the terminal device can be handed over to the target cell or the candidate cell.
  • the source base station carries the reference clock information of the source cell in the handover request message.
  • the network device corresponding to the candidate cell or the network device corresponding to the target cell receives the handover request message, According to the reference clock information of the source cell, it can be determined whether the terminal device can switch to the candidate cell or the target cell, which improves the flexibility of access control for the candidate cell or the target cell.
  • the source base station can send the reference clock information to the UE through an RRC message or a handover command. .
  • the UE can save the reference clock information.
  • the reference clock information can be used for: TSC synchronization between UE and target cell, TSC synchronization between UE and target base station, TSN synchronization between UE and target cell, TSN synchronization between UE and target base station, UE TSC service transmission with the target cell, TSC service transmission between the UE and the target base station, measurement report, etc.
  • Fig. 8 shows a flowchart of another cell handover management method provided by this application. As shown in Fig. 8, the cell handover management method includes the following steps:
  • the source base station 21 sends measurement configuration information to the terminal device.
  • the source base station 21 sends measurement configuration information to the terminal device 20.
  • the measurement configuration information may include identification information of at least one candidate cell specified by the source base station 21.
  • the measurement configuration information is used to instruct the terminal device 20 to obtain the at least one candidate cell.
  • Reference clock information of a candidate cell For example, the at least one candidate cell is cell 32, cell 33, and cell 34.
  • the terminal device measures the reference clock information of at least one candidate cell.
  • the terminal device 20 reads the system information of the cell 32, the cell 33, and the cell 34 respectively, and obtains the reference clock information of the cell 32 from the system information of the cell 32, and obtains the reference clock of the cell 33 from the system information of the cell 33 Information, the reference clock information of the cell 34 is obtained from the system information of the cell 34.
  • the system information may specifically be at least one of a system information block (System Information Block, SIB) 1, a SIB9, and a master system information block (Master Information Block, MIB).
  • SIB System Information Block
  • MIB master system information block
  • the terminal device 20 may also store the reference clock information corresponding to the cell 32, the cell 33, and the cell 34 locally for subsequent measurement reporting and synchronization between the terminal device 20 and the target base station (for example, TSC or TSN synchronization). ), at least one of service transmission (for example, TSC service transmission) between the terminal device 20 and the target base station.
  • S803 The terminal device sends the measurement result to the source base station 21.
  • the measurement configuration information includes an indication message.
  • the indication message is used to instruct the terminal device 20 to feed back the reference clock information of at least one candidate cell designated by the source base station 21.
  • the measurement result sent by the terminal device 20 to the source base station 21 includes reference clock information corresponding to the cell 32, the cell 33, and the cell 34, respectively.
  • the indication message is used to instruct the terminal device 20 to feed back a candidate cell in the at least one candidate cell whose clock precision is higher than a preset precision threshold or whose clock precision is the same as that of the source cell, or
  • the indication message is used to instruct the terminal device 20 to feed back the reference clock information of the candidate cell in the at least one candidate cell whose clock precision is higher than a preset precision threshold or whose clock precision is the same as that of the source cell.
  • the terminal device 20 after obtaining the reference clock information corresponding to the cell 32, the cell 33, and the cell 34, the terminal device 20 further determines whether the clock accuracy of the cell 32, the cell 33, and the cell 34 is higher than the preset accuracy threshold.
  • a candidate cell with the same clock accuracy as the source cell for example, the clock accuracy of cell 32 is higher than the preset accuracy threshold, the clock accuracy of cell 33 is the same as the clock accuracy of source cell 31, and the clock accuracy of cell 34 is lower than that of the source cell If the clock accuracy is 31, the measurement result sent by the terminal device 20 to the source base station 21 includes the reference clock information corresponding to the cell 32 and the cell 33, but does not include the reference clock information of the cell 34.
  • the UE after the UE obtains the reference clock information described in S802, the UE only measures candidate cells whose clock accuracy is higher than a preset accuracy threshold or whose clock accuracy is the same as that of the source cell.
  • the source base station 21 determines the target cell according to the measurement result.
  • the source base station 21 can determine the cell 32, the cell 33, and the cell according to the reference clock information corresponding to the cell 32, the cell 33, and the cell 34.
  • the cell whose clock accuracy is higher than the preset accuracy threshold or the same as the source cell's clock accuracy is the target cell. If there are more than one target cells, you can use the method described in the above embodiment to select the target cell.
  • the target cell to which the terminal device can be handed over is determined in the target cell.
  • the measurement result includes the reference clock information of a cell whose clock accuracy is higher than the preset accuracy threshold or the same as the clock accuracy of the source cell, for example, the reference clock information corresponding to the cell 32 and the cell 33 respectively, because the preset conditions are met
  • the target cell to which the terminal device can be handed over can also be determined from the multiple cells that meet the preset conditions according to the method described in the foregoing embodiment.
  • the target cell to which the terminal device can be handed over is cell 32.
  • the source base station 21 sends a handover request message to the base station 22, where the handover request message is used to request the base station 22 to feed back the handover response information of the terminal device 20 handing over from the source cell 31 to the target cell 32.
  • the base station 22 After receiving the handover request message, the base station 22 performs handover judgment, that is, access control, to determine whether the terminal device 20 can be handed over to the target cell, and further, sends handover response information to the source base station 21.
  • handover judgment that is, access control
  • the base station 22 sends handover response information to the source base station 21, where the handover response information is ACK.
  • the source base station 21 sends a handover instruction to the terminal device, where the handover instruction is used to instruct the terminal device 20 to switch from being connected to the source base station 21 to being connected to the target base station 22 in the target cell 32.
  • the terminal device After the terminal device receives the handover instruction, it executes the air interface handover process.
  • the handover process is specifically the process described in the foregoing embodiment, and will not be repeated here.
  • the handover instruction may also include the reference clock information of the target cell 32, that is, the source base station 21 may send the reference clock information of the target cell 32 to the terminal device 20 through the handover instruction, and the terminal device 20 may The reference clock information of the target cell 32 is stored.
  • the source base station 21 may also send a radio resource control (Radio Resource Control, RRC) message to the terminal device 20, and the RRC message may include the target cell 32 That is, the source base station 21 may also send the reference clock information of the target cell 32 to the terminal device 20 through an RRC message, and the terminal device 20 may store the reference clock information of the target cell 32.
  • RRC Radio Resource Control
  • the source base station sends measurement configuration information to the terminal device, so that the terminal device measures the reference clock information of at least one candidate cell, and sends the measurement result to the source base station, and the source base station uses the measurement result Determine the target cell and send a handover request message to the target cell.
  • the source base station sends a handover instruction to the terminal device, so that the terminal device switches from communicating with the source base station to communicating with the target cell.
  • the communication connection of the target base station in the cell improves the flexibility of the source base station to determine the target cell.
  • the source base station can obtain reference clock information from the network equipment or terminal equipment of at least one candidate cell.
  • the source base station may store the reference clock information locally, or the source base station may obtain the reference clock information from the core
  • the network element or OAM or CNC obtains reference clock information.
  • the network device 91 may specifically be an OAM network element, a CNC network element, or an AMF network element, that is, the network device 91 may specifically be the third communication node as described above.
  • the network device 91 can communicate with the source base station 21.
  • the source base station 21 can detect the locally stored reference clock information, and according to the reference clock information, determine a target cell that meets preset conditions, and initiate a handover procedure for the terminal device to switch from the source cell to the target cell .
  • the source base station 21 may locally store the reference clock information corresponding to the neighboring cells of the active cell 31, namely, the cell 32, the cell 33, and the cell 34, and further, according to the reference clock information corresponding to the cell 32, the cell 33, and the cell 34, respectively, It is determined that the cell with clock accuracy higher than the preset accuracy threshold or the same as the clock accuracy of the source cell 31 among the cells 32, 33, and 34 is the target cell.
  • the clock accuracy of two or more of the cells 32, 33, and 34 is higher than the preset accuracy threshold or the same as the clock accuracy of the source cell 31, that is, there are multiple target cells, then the clock accuracy of the above-mentioned embodiment can be used.
  • the target cell to which the terminal equipment can be handed over among multiple target cells is determined.
  • the source base station 21 may locally store the reference clock information corresponding to the neighboring cells of the active cell 31, namely, the cell 32, the cell 33, and the cell 34, and the source base station 21 detects the reference of at least one candidate cell among the neighboring cells stored locally.
  • Clock information for example, the source base station 21 detects the reference clock information of the candidate cell 32 and the candidate cell 33, and further, according to the reference clock information of the candidate cell 32 and the candidate cell 33, determines that the clock accuracy of the candidate cell 32 and the candidate cell 33 is higher than
  • the cell with the preset accuracy threshold or the same as the clock accuracy of the source cell 31 is the target cell, and a handover procedure for the terminal device to switch from the source cell to the target cell is initiated.
  • the handover procedure is specifically as described above and will not be repeated here.
  • the source base station 21 obtains reference clock information from the network device 91, and according to the reference clock information, determines the target cell that meets the preset conditions, and initiates the terminal device to be used by the source cell.
  • Handover procedure for handover to the target cell includes the following steps:
  • the source base station 21 sends a first request message to the network device 91, where the first request message is used to request the network device 91 to feed back reference clock information.
  • the network device 91 sends reference clock information to the source base station 21.
  • the source base station 21 determines a target cell that meets a preset condition according to the reference clock information, and initiates a handover procedure for the terminal device to switch from the source cell to the target cell.
  • the network device 91 may store the reference clock information corresponding to the neighboring cells of the active cell 31, namely, the cell 32, the cell 33, and the cell 34, respectively.
  • the first request message is used to request the network device 91 to feed back the information of the source cell 31.
  • the reference clock information of the neighboring cell correspondingly, in S1002, the network device 91 sends to the source base station 21 the reference clock information corresponding to the cell 32, the cell 33, and the cell 34, respectively.
  • the source base station 21 determines, according to the reference clock information corresponding to the cell 32, the cell 33, and the cell 34, that the clock accuracy of the cell 32, the cell 33, and the cell 34 is higher than the preset accuracy threshold or the clock accuracy of the source cell 31 The same cell is the target cell. If the clock accuracy of two or more of the cells 32, 33, and 34 is higher than the preset accuracy threshold or the same as the clock accuracy of the source cell 31, that is, there are multiple target cells, then the clock accuracy of the above-mentioned embodiment can be used. In the method described above, the target cell to which the terminal equipment can be handed over among multiple target cells is determined.
  • the network device 91 may store the reference clock information corresponding to the neighboring cells of the active cell 31, namely, the cell 32, the cell 33, and the cell 34.
  • the first request message is used to request the network device 91 to feed back the information of the source cell 31.
  • the reference clock information of at least one candidate cell in the neighboring cells is used to request the network device 91 to feed back the information of the source cell 31.
  • the network device 91 sends the reference clock information of the candidate cell 32 and the candidate cell 33 to the source base station 21.
  • the source base station 21 determines, according to the reference clock information of the candidate cell 32 and the candidate cell 33, the candidate cell 32 and the candidate cell 33 whose clock precision is higher than the preset precision threshold or the cell whose clock precision is the same as that of the source cell 31 It is the target cell, and initiates a handover procedure for the terminal device to switch from the source cell to the target cell.
  • the handover procedure is specifically as described above and will not be repeated here.
  • the source base station 21 may detect the locally stored reference clock information, and send a first request message to the network device 91. Further, the source base station 21 may use the locally stored reference clock information and the network device 91 to send a first request message.
  • the feedback reference clock information determines the target cell that meets the preset conditions, and initiates a handover procedure for the terminal device to switch from the source cell to the target cell.
  • the target cell is the cell 32
  • the target base station is the base station 22 in the cell 32.
  • the handover procedure may include the following steps as shown in FIG. 11:
  • the source base station 21 sends a second request message to the target base station, where the second request message is used to request the target base station to feed back the handover response information of the terminal device handover from the source cell to the target cell.
  • the second request message may be the handover request message as described above.
  • the target base station sends handover response information to the source base station 21, where the handover response information is ACK.
  • the source base station 21 sends a handover instruction to the terminal device, where the handover instruction is used to instruct the terminal device to switch from being connected to the source base station 21 to being connected to the target base station.
  • the handover instruction may also include the reference clock information of the target cell. That is, the source base station 21 may send the reference clock information of the target cell 32 to the terminal device 20 through a handover instruction, and the terminal device 20 may store the reference clock information of the target cell 32.
  • the source base station 21 may also send an RRC message to the terminal device 20, and the RRC message may include the reference clock information of the target cell 32, that is, The source base station 21 may also send the reference clock information of the target cell 32 to the terminal device 20 through an RRC message, and the terminal device 20 may store the reference clock information of the target cell 32.
  • the source base station 21 may also store the reference clock information of the neighboring cell or at least one candidate cell of the source cell stored locally, or the neighboring cell or the reference clock information obtained from the OAM network element, CNC network element, or AMF network element.
  • the reference clock information of at least one candidate cell is sent to the terminal device, and the terminal device saves the reference clock information of the neighboring cell or at least one candidate cell locally for subsequent measurement reporting and the terminal device after the terminal device 20 switches to the target cell At least one of synchronization between 20 and the target base station, and service transmission between the terminal device 20 and the target base station after the terminal device 20 is handed over to the target cell.
  • the source base station 21 may also store the clock requirements for TSN service or TSC service transmission locally.
  • the OAM network element, CNC network element, or AMF network element stores a clock requirement for TSN service or TSC service transmission, and the source base station 21 obtains the clock requirement from the OAM network element, CNC network element, or AMF network element.
  • the clock requirements include at least one of the following: support for TSN services or support for TSC services, supported TSN services or types of TSC services, supported TSC domain index, supported TSN domain index, supported high-precision or low-precision, and supported The precision granularity.
  • the source base station may determine the neighboring cell whose reference clock information meets the clock requirement as the target cell according to the clock requirement and the reference clock information of the neighboring cell.
  • the source base station may determine the candidate cell whose reference clock information meets the clock requirement as the target cell according to the clock requirement and the reference clock information of at least one candidate cell.
  • the OAM network element, CNC network element, or AMF network element can also be used to store at least one of the following: the positional relationship between the source cell and its neighboring cells, the reference clock information of the source cell, and the reference of the neighboring cell Clock information, the difference between the reference clock information of the source cell and the reference clock information of the neighboring cell.
  • the reference clock information of the source cell and the reference clock information of the neighboring cells may respectively include at least one of the following: reference system frame number (System Frame Number, SFN), TSC clock domain (TSC domain index), TSN clock domain (TSN domain index), time (for example, 10 o’clock, 9 minutes, 8 seconds, 10 milliseconds, 1 microsecond), clock precision value (for example, 1 millisecond, 10 nanoseconds, 1 microsecond), clock precision type (for example, low precision, Normal precision, high precision, etc.) indication information, time information type (timeInfoType), and uncertainty (uncertainty).
  • reference system frame number System Frame Number, SFN
  • TSC domain index TSC clock domain index
  • TSN clock domain TSN clock domain
  • time for example, 10 o’clock, 9 minutes, 8 seconds, 10 milliseconds, 1 microsecond
  • clock precision value for example, 1 millisecond, 10 nanoseconds, 1 microsecond
  • clock precision type for example, low precision, Normal precision, high precision, etc.
  • timeInfoType time information type
  • the difference between the reference clock information of the source cell and the reference clock information of the neighboring cell may include at least one of the following: the difference between the reference SFN of the source cell and the reference SFN of the neighboring cell, and the clock accuracy value of the source cell and the phase difference.
  • Species The positional relationship between the source cell and its neighboring cells, the reference clock information of the source cell, and the difference between the reference clock information of the source cell and the reference clock information of the neighboring cell.
  • the source cell may also send the identification information of the multiple target cells to the OAM network element, CNC network element, or AMF network.
  • the OAM network element, CNC network element, or AMF network element can determine the priority ranking of multiple target cells as target cells to which the terminal device can be handed over.
  • the OAM network element, the CNC network element, or the AMF network element sends the priority ranking to the source cell, and the source cell determines the target cell to which the terminal device can be handed over according to the priority ranking.
  • the source base station detects locally stored reference clock information, and/or obtains reference clock information from OAM network elements, CNC network elements, or AMF network elements, and further, according to the reference clock information , Determine the target cell that meets the preset conditions, and initiate a handover procedure for the terminal device to switch from the source cell to the target cell, which further improves the flexibility of the source base station to determine the target cell.
  • FIG. 12 is a schematic structural diagram of the first communication node provided by this application. As shown in FIG. 12, the first communication node 120 includes:
  • the receiving module 121 is configured to receive reference clock information from a designated node
  • the determining module 122 is configured to determine a target cell meeting preset conditions according to the reference clock information, and initiate a handover procedure for the second communication node to switch from the source cell to the target cell, where the second communication node and the The first communication node is connected, and the first communication node belongs to the source cell.
  • the first communication node provided in this embodiment is used to implement the technical solution on the first communication node side in any of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the first communication node further includes: a sending module 123, configured to send an instruction message to the designated node before the receiving module 121 receives the reference clock information from the designated node, where The instruction message is used to instruct the designated node to send the reference clock information of the cell corresponding to the designated node.
  • a sending module 123 configured to send an instruction message to the designated node before the receiving module 121 receives the reference clock information from the designated node, where The instruction message is used to instruct the designated node to send the reference clock information of the cell corresponding to the designated node.
  • the sending module 123 is specifically configured to send the indication message to the network device corresponding to the at least one candidate cell, the indication message Is used to instruct the network device corresponding to the at least one candidate cell to send the reference clock information corresponding to the at least one candidate cell;
  • the determining module is specifically configured to: according to all the information sent by the network device corresponding to the at least one candidate cell The reference clock information determines the target cell;
  • the sending module 123 is further configured to: send a handover instruction to the second communication node, where the handover instruction is used to instruct the second communication node to switch by connecting with the first communication node Connect to the network device corresponding to the target cell.
  • the sending module 123 when the sending module 123 sends the indication message to the network device corresponding to the at least one candidate cell, it is specifically configured to: send a handover request message to the network device corresponding to the at least one candidate cell, where the handover The request message is used to request the network device corresponding to the at least one candidate cell to send handover response information for the second communication node to switch from the source cell to the candidate cell; to correspond to the candidate cell whose handover response information is ACK The network device of sends the instruction message.
  • the sending module 123 when the sending module 123 sends the indication message to the network device corresponding to the at least one candidate cell, it is specifically configured to: send a handover request message to the network device corresponding to the at least one candidate cell, the handover request message Includes the indication message; when the receiving module 121 receives reference clock information from a designated node, it is specifically configured to: receive from the network device corresponding to the at least one candidate cell that the second communication node is handed over from the source cell to the candidate cell Handover response information of the cell, where the handover response information includes the reference clock information.
  • the sending module 123 is further configured to: after the determining module determines the target cell according to the reference clock information sent by the network device corresponding to the at least one candidate cell, send a message to the network corresponding to the target cell
  • the device sends a handover request message, where the handover request message is used to request the network device corresponding to the target cell to send handover response information that the second communication node is handed over from the source cell to the target cell; sending module 123
  • sending the handover instruction to the second communication node it is specifically used to: when the handover response information sent by the network device corresponding to the target cell is an ACK, send the handover instruction to the second communication node.
  • the handover request message further includes: reference clock information of the source cell, and the reference clock information of the source cell is used by the network equipment corresponding to the candidate cell or the network equipment corresponding to the target cell to determine Whether the handover response information is ACK.
  • the determining module determines the target cell according to the reference clock information sent by the network device corresponding to the at least one candidate cell, it is specifically configured to: determine whether the clock accuracy is higher than a preset accuracy threshold or The candidate cell with the same clock accuracy of the source cell is used as the target cell.
  • the determining module determines that the clock accuracy of the at least one candidate cell is lower than the preset accuracy threshold or both are lower than the clock accuracy of the source cell, or when determining the at least one In the case that the clock accuracy of one candidate cell is different from the preset accuracy threshold or both are different from the clock accuracy of the source cell, the determining module is based on the reference sent by the network device corresponding to the at least one candidate cell
  • the clock information when determining the target cell, is specifically used for at least one of the following: determining a cell with a channel quality greater than a preset quality threshold in the at least one candidate cell as the target cell; determining the target cell according to a pre-configuration; Determine that the cell with the highest clock accuracy among the at least one candidate cell is the target cell; determine that the handover fails.
  • the sending module 123 is specifically configured to send measurement configuration information to the terminal device, where the measurement configuration information is used for Instruct the terminal device to obtain the reference clock information of at least one candidate cell; the determining module is specifically configured to determine the target cell according to the measurement result fed back by the terminal device; the sending module 123 is further configured to: The cell sends a handover request message, where the handover request message is used to request the network equipment corresponding to the target cell to feed back the handover response information of the terminal equipment handover from the source cell to the target cell; When the handover response information is ACK, send a handover instruction to the terminal device, where the handover instruction is used to instruct the terminal device to switch from being connected to the first communication node to a network device connection corresponding to the target cell .
  • the measurement configuration information includes an indication message, and the indication message is used to instruct the terminal device to feed back the reference clock information of the at least one candidate cell.
  • the measurement configuration information includes an indication message for instructing the terminal device to feed back that the clock accuracy of the at least one candidate cell is higher than a preset accuracy threshold or is compared with the clock accuracy of the source cell The same candidate cell; or, used to instruct the terminal device to feed back reference clock information of a candidate cell whose clock precision is higher than a preset precision threshold or whose clock precision is the same as that of the source cell in the at least one candidate cell.
  • the reference clock information includes at least one of the following: reference clock information of a time-sensitive network TSN clock, reference clock information of a time-sensitive transmission TSC clock, reference of a high-precision clock whose time precision meets a preset precision threshold Clock information.
  • the reference clock information includes at least one of the following: reference system frame number SFN, clock domain of TSC, clock domain of TSN, time, clock precision value, indication information of clock precision type, time information type, inaccuracy degree.
  • the first communication node includes at least: a source network device corresponding to the source cell; and the second communication node includes at least a terminal device.
  • the handover instruction includes reference clock information of the target cell.
  • the sending module 123 is further configured to: after the determining module determines a target cell that meets a preset condition, send a radio resource control RRC message to the second communication node, where the RRC message includes the reference of the target cell Clock information.
  • FIG. 13 is a schematic structural diagram of the network equipment corresponding to the candidate cell provided in this application. As shown in FIG. 13, the network equipment 130 corresponding to the candidate cell includes:
  • the determining module 131 is configured to determine the reference clock information sent to the first communication node
  • the sending module 132 is configured to send reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a handover of the second communication node from the source cell to the target cell In the cell handover procedure, the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • the network equipment corresponding to the candidate cell provided in this embodiment is used to implement the technical solution on the network equipment side corresponding to the candidate cell in any of the foregoing method embodiments.
  • the implementation principles and technical effects are similar, and will not be repeated here.
  • the network device further includes: a receiving module 133, configured to receive an indication message from the first communication node before the sending module sends the reference clock information to the first communication node, wherein the indication message It is used to instruct the network device corresponding to the candidate cell to send the reference clock information of the candidate cell.
  • a receiving module 133 configured to receive an indication message from the first communication node before the sending module sends the reference clock information to the first communication node, wherein the indication message It is used to instruct the network device corresponding to the candidate cell to send the reference clock information of the candidate cell.
  • the receiving module when the receiving module receives the instruction message from the first communication node, it is specifically configured to: receive a handover request message from the first communication node, where the handover request message is used to request the The network equipment corresponding to the candidate cell sends the handover response information that the second communication node is handed over from the source cell to the candidate cell; when the handover response information sent by the network equipment corresponding to the candidate cell is an ACK, from the The first communication node receives the instruction message.
  • the receiving module when the receiving module receives an indication message from the first communication node, it is specifically configured to: receive a handover request message from the first communication node, where the handover request message includes the indication message; and the sending
  • the module sends the reference clock information to the first communication node it is specifically used to: send to the first communication node the handover response information that the second communication node is handed over from the source cell to the candidate cell, the handover response The information includes the reference clock information.
  • the receiving module is further configured to: receive a handover request message from the first communication node, wherein The handover request message is used to request the network device corresponding to the candidate cell to send handover response information for the second communication node to switch from the source cell to the candidate cell.
  • the handover request message further includes: reference clock information of the source cell, and the reference clock information of the source cell is used by a network device corresponding to the candidate cell to determine whether the handover response information is an ACK.
  • the reference clock information includes at least one of the following: reference clock information of a time-sensitive network TSN clock, reference clock information of a time-sensitive transmission TSC clock, reference of a high-precision clock whose time precision meets a preset precision threshold Clock information.
  • the reference clock information includes at least one of the following: reference system frame number SFN, clock domain of TSC, clock domain of TSN, time, clock precision value, indication information of clock precision type, time information type, inaccuracy degree.
  • the first communication node includes at least: a source network device corresponding to the source cell; and the second communication node includes at least a terminal device.
  • FIG. 14 is a schematic structural diagram of the terminal device provided by this application.
  • the terminal device 140 includes: a determining module 141 and a sending module 142, wherein the determining module 141 is used to determine the data sent to the first communication node Reference clock information; the sending module 142 is configured to send reference clock information to the first communication node, where the reference clock information is used by the first communication node to determine a target cell that meets preset conditions, and to initiate a second communication node from the source cell A handover procedure for handover to a target cell, wherein the second communication node is connected to the first communication node, and the first communication node belongs to the source cell.
  • the terminal device provided in this embodiment is used to execute the technical solution on the terminal device side in any of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the terminal device further includes: a receiving module 143 and an obtaining module 144; wherein, the receiving module 143 is used before the sending module sends reference clock information to the first communication node, The measurement configuration information is received from the first communication node; the obtaining module 144 is configured to obtain reference clock information of at least one candidate cell according to the measurement configuration information.
  • the measurement configuration information includes an indication message for instructing the terminal device to feed back the reference clock information of the at least one candidate cell; when the sending module sends the reference clock information to the first communication node , Specifically configured to: send a measurement result to the first communication node, where the measurement result includes reference clock information of the at least one candidate cell.
  • the measurement configuration information includes an indication message for instructing the terminal device to feed back that the clock accuracy of the at least one candidate cell is higher than a preset accuracy threshold or is compared with the clock accuracy of the source cell
  • the sending module sends reference clock information to the first communication node, it is specifically configured to: send a measurement result to the first communication node, where the measurement result includes the clock accuracy of the at least one candidate cell that is higher than a preset accuracy threshold Or reference clock information of a candidate cell with the same accuracy as the clock accuracy of the source cell.
  • the obtaining module obtains the reference clock information of at least one candidate cell, it is specifically configured to: read the system information of the at least one candidate cell, and obtain the information of the at least one candidate cell from the system information. Reference clock information.
  • the receiving module is further configured to: after the sending module sends the measurement result to the first communication node, receive a switching instruction from the first communication node, and the switching instruction is used to instruct the terminal device Switching from the connection with the first communication node to the connection with the network device corresponding to the target cell.
  • the terminal device further includes: a storage module 145, configured to read the system information of the at least one candidate cell by the acquisition module, and acquire the reference clock of the at least one candidate cell from the system information After the information, the reference clock information of the at least one candidate cell is saved, and the reference clock information of the at least one candidate cell is used for at least one of the following: the terminal device makes a measurement report to the first communication node; the terminal The device synchronizes with the network device corresponding to the target cell; the terminal device performs service transmission with the network device corresponding to the target cell.
  • a storage module 145 configured to read the system information of the at least one candidate cell by the acquisition module, and acquire the reference clock of the at least one candidate cell from the system information After the information, the reference clock information of the at least one candidate cell is saved, and the reference clock information of the at least one candidate cell is used for at least one of the following: the terminal device makes a measurement report to the first communication node; the terminal The device synchronizes with the network device corresponding to the target cell
  • FIG. 15 is a schematic structural diagram of the first communication node provided by this application.
  • the first communication node 150 includes: a detection module 151 and/or a sending module 152, and a determination module 153; wherein, the detection module 151 is used to detect the locally stored reference clock information; the sending module 152 is used to send a first request message to the third communication node, where the first request message is used to request the third communication node to feed back the reference clock information; determine The module 153 is configured to determine a target cell that meets preset conditions according to the obtained reference clock information, and initiate a handover procedure for the second communication node to switch from the source cell to the target cell, where the first communication node belongs to all In the source cell, the second communication node is connected to the first communication node.
  • the reference clock information is reference clock information of a neighboring cell of the source cell; when the determining module determines a target cell that meets a preset condition, it is specifically used to: determine the accuracy of the clock in the neighboring cell A cell that is higher than a preset accuracy threshold or that has the same clock accuracy as the source cell is the target cell.
  • the reference clock information is reference clock information of at least one candidate cell among neighboring cells of the source cell; when the determining module determines a target cell that meets a preset condition, it is specifically configured to: determine the at least A candidate cell whose clock precision is higher than a preset precision threshold or whose clock precision is the same as that of the source cell in a candidate cell is used as the target cell.
  • the sending module when the first communication node initiates the handover procedure of the second communication node from the source cell to the target cell, the sending module is specifically configured to send a second request message to the fourth communication node, wherein the first communication node The second request message is used to request the fourth communication node to feed back the handover response information of the second communication node from the source cell to the target cell, and the fourth communication node belongs to the target cell;
  • the sending module sends a switching instruction to the second communication node, where the switching instruction is used to instruct the second communication node to switch from being connected to the first communication node to Connected with the fourth communication node.
  • the reference clock information includes at least one of the following: reference clock information of a time-sensitive network TSN clock, reference clock information of a time-sensitive transmission TSC clock, reference of a high-precision clock whose time precision meets a preset precision threshold Clock information.
  • the reference clock information includes at least one of the following: reference system frame number SFN, clock domain of TSC, clock domain of TSN, time, clock precision value, indication information of clock precision type, time information type, inaccuracy degree.
  • the first communication node includes at least: a source network device corresponding to the source cell; the second communication node includes at least a terminal device; and the third communication node includes: operation maintenance management OAM, access And at least one of the mobility management entity AMF and the central network control CNC network element; the fourth communication node includes at least: a target network device corresponding to the target cell.
  • the handover instruction includes reference clock information of the target cell.
  • the sending module is further configured to: send a radio resource control RRC message to the second communication node, where the RRC message includes the target cell's Reference clock information.
  • FIG. 16 is a schematic structural diagram of the third communication node provided by this application.
  • the third communication node 160 includes: a receiving module 161 and a sending module 162; wherein, the receiving module 161 is used to receive the first communication A first request message sent by a node, where the first request message is used to request the third communication node to feed back reference clock information, and the reference clock information is used by the first communication node to determine a target that meets a preset condition Cell, and initiates a handover procedure for the second communication node to switch from the source cell to the target cell, wherein the first communication node belongs to the source cell, and the second communication node is connected to the first communication node; sending module 162 is configured to send the feedback reference clock information to the first communication node.
  • the reference clock information includes at least one of the following: reference clock information of a time-sensitive network TSN clock, reference clock information of a time-sensitive transmission TSC clock, reference of a high-precision clock whose time precision meets a preset precision threshold Clock information.
  • the reference clock information includes at least one of the following: reference system frame number SFN, clock domain of TSC, clock domain of TSN, time, clock precision value, indication information of clock precision type, time information type, inaccuracy degree.
  • the first communication node includes at least: a source network device corresponding to the source cell; the second communication node includes at least a terminal device; and the third communication node includes: operation maintenance management OAM, access And at least one of the mobility management entity AMF and the central network control CNC network element.
  • FIG. 17 is a schematic diagram of another structure of the first communication node provided by this application. As shown in FIG. 17, the first communication node 170 includes:
  • the memory 172 stores computer execution instructions
  • the processor 171 executes the computer-executable instructions stored in the memory 172, so that the processor 171 executes the technical solution on the first communication node side in any of the foregoing method embodiments.
  • Fig. 17 is a simple design of the first communication node.
  • the embodiment of the present application does not limit the number of processors and memories in the first communication node.
  • Fig. 17 only uses 1 as an example for illustration.
  • FIG. 18 is another schematic structural diagram of the network equipment corresponding to the candidate cell provided in this application. As shown in FIG. 18, the network equipment 180 corresponding to the candidate cell includes:
  • the memory 182 stores computer execution instructions
  • the processor 181 executes the computer-executable instructions stored in the memory 182, so that the processor 181 executes the technical solution on the network device side corresponding to the candidate cell in any of the foregoing method embodiments.
  • FIG. 18 is a simple design of the network device corresponding to the candidate cell.
  • the embodiment of the present application does not limit the number of processors and memories in the network device corresponding to the candidate cell.
  • FIG. 18 only uses 1 as an example for illustration.
  • FIG. 19 is a schematic diagram of another structure of the terminal device provided by this application. As shown in FIG. 19, the terminal device 190 includes:
  • the memory 192 stores computer execution instructions
  • the processor 191 executes the computer-executable instructions stored in the memory 192, so that the processor 191 executes the technical solution on the terminal device side in any of the foregoing method embodiments.
  • FIG. 19 is a simple design of the terminal device.
  • the embodiment of the present application does not limit the number of processors and memories in the terminal device.
  • FIG. 19 only takes the number of 1 as an example for illustration.
  • FIG. 20 is a schematic diagram of another structure of the third communication node provided by this application. As shown in FIG. 20, the third communication node 200 includes:
  • a processor 201 a processor 201, a memory 202, and a communication interface 203;
  • the memory 202 stores computer execution instructions
  • the processor 201 executes the computer-executable instructions stored in the memory 202, so that the processor 201 executes the technical solution on the third communication node side in any of the foregoing method embodiments.
  • FIG. 20 is a simple design of the third communication node.
  • the embodiment of the present application does not limit the number of processors and memories in the third communication node.
  • FIG. 20 only uses 1 as an example for illustration.
  • the embodiment of the present application also provides a computer-readable storage medium, and the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, it is used to implement any of the foregoing method embodiments.
  • An embodiment of the present application also provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the cell handover management method described in any of the foregoing method embodiments .
  • An embodiment of the present application also provides a computer program product, including computer program instructions, which cause a computer to execute the cell handover management method described in any of the foregoing method embodiments.
  • An embodiment of the present application also provides a computer program that enables a computer to execute the cell handover management method described in any of the foregoing method embodiments.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division, and there may be other divisions in actual implementation, for example, multiple modules can be combined or integrated. To 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 through some interfaces.
  • the indirect coupling or communication connection of the modules may be in electrical, mechanical or other forms.
  • the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), Application Specific Integrated Circuit (ASIC), etc.
  • 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 this application can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • All or part of the steps in the foregoing method embodiments can be implemented by a program instructing relevant hardware.
  • the aforementioned program can be stored in a readable memory.
  • the program executes the steps of the above-mentioned method embodiments; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state hard disk, magnetic tape (magnetic tape), floppy disk (floppy disk), optical disc (optical disc) and any combination thereof.

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Abstract

本申请实施例提供一种小区切换的管理方法、设备及存储介质，当终端设备需要从源小区切换到其他小区时，源小区中的网络设备根据从指定节点接收到的参考时钟信息，确定出满足预设条件的目标小区，进一步，将终端设备从源小区切换到目标小区中，其中，该预设条件可以是满足TSN或TSC时钟要求的预设条件，也就是说，当目标小区满足TSN或TSC的时钟要求时，可以将终端设备从源小区切换到该目标小区，避免将终端设备随意切换到一个目标小区，而目标小区不满足TSN或TSC时钟要求时导致的TSN业务或TSC业务时延增大或QoS下降的问题。

Description

小区切换的管理方法、设备及存储介质 技术领域
本申请实施例涉及通信技术，尤其涉及一种小区切换的管理方法、设备及存储介质。
背景技术
在5G工业物联网(Industrial Internet Of Things，IIoT)中，5G通信系统可用于传输工业自动化(Factory automation)、传输自动化(Transport Industry)、智能电力(Electrical Power Distribution)等业务。由于该业务对低时延和可靠性传输的要求较高，因此，IIoT中引入了时间敏感性网络(Time Sensitive Networking，TSN)或时间敏感性传输(Time Sensitive Conveying，TSC)的概念。
为了满足TSN业务或TSC业务对低时延和可靠性传输的要求，5G通信系统需要提供更低的时延保证和更高的时间同步精度。而在5G通信系统中，终端设备可能会从一个小区即源小区切换到另一个小区即目标小区，如果目标小区不能满足较高的时间同步精度，将导致该终端设备传输的TSN业务或TSC业务的时延较大，或者，该终端设备传输的TSN业务或TSC业务的服务质量(Quality of Service，QoS)下降。
发明内容
本申请实施例提供一种小区切换的管理方法、设备及存储介质，以避免将终端设备随意切换到一个目标小区，而目标小区不满足TSN或TSC时钟要求时导致的TSN业务或TSC业务时延增大或QoS下降的问题。
第一方面，本申请实施例可提供一种小区切换的管理方法，该方法包括：
第一通信节点从指定节点接收参考时钟信息；
根据所述参考时钟信息，所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第二方面，本申请实施例可提供一种小区切换的管理方法，该方法包括：
候选小区对应的网络设备向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第三方面，本申请实施例可提供一种小区切换的管理方法，该方法包括：
终端设备向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第四方面，本申请实施例可提供一种小区切换的管理方法，该方法包括：
第一通信节点检测本地保存的参考时钟信息，和/或，第一通信节点向第三通信节点发送第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息；
根据获取到的所述参考时钟信息，所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
第五方面，本申请实施例可提供一种小区切换的管理方法，该方法包括：
第三通信节点接收第一通信节点发送的第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
第六方面，本申请实施例可提供一种第一通信节点，其特征在于，包括：
接收模块，用于从指定节点接收参考时钟信息；
确定模块，用于根据所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源 小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第七方面，本申请实施例可提供一种候选小区对应的网络设备，包括：
确定模块，用于确定向第一通信节点发送的参考时钟信息；
发送模块，用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第八方面，本申请实施例可提供一种终端设备，包括：
确定模块，用于确定向第一通信节点发送的参考时钟信息；
发送模块，用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
第九方面，本申请实施例可提供一种第一通信节点，包括：检测模块和/或发送模块，以及确定模块；
所述检测模块用于检测本地保存的参考时钟信息；
所述发送模块用于向第三通信节点发送第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息；
所述确定模块用于根据获取到的所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
第十方面，本申请实施例可提供一种第三通信节点，其特征在于，包括：
接收模块，用于接收第一通信节点发送的第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接；
发送模块，用于向所述第一通信节点发送所述反馈参考时钟信息。
第十一方面，本申请实施例可提供一种第一通信节点，包括：
处理器、存储器、与通信接口；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第一方面或第四方面所述的小区切换的管理方法。
第十二方面，本申请实施例可提供一种候选小区对应的网络设备，包括：
处理器、存储器、与通信接口；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第二方面所述的小区切换的管理方法。
第十三方面，本申请实施例可提供一种终端设备，包括：
处理器、存储器、与通信接口；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第三方面所述的小区切换的管理方法。
第十四方面，本申请实施例可提供一种第三通信节点，包括：
处理器、存储器、与通信接口；
所述存储器存储计算机执行指令；
所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如第五方面所述的小区切换的管理方法。
第十五方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现如第一方面、第二方面、第三方面、第四方面或第五方面所述的小区切换的管理方法。
第十六方面，本申请实施例提供一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如第一方面、第二方面、第三方面、第四方面或第五方面所述的小区切 换的管理方法。
第十七方面，本申请实施例提供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如第一方面、第二方面、第三方面、第四方面或第五方面所述的小区切换的管理方法。
第十八方面，本申请实施例还提供一种计算机程序，该计算机程序使得计算机执行如上第一方面、第二方面、第三方面、第四方面或第五方面所述的小区切换的管理方法。
本申请实施例提供的小区切换的管理方法、设备及存储介质，当终端设备需要从源小区切换到其他小区时，源小区中的网络设备根据从指定节点接收到的参考时钟信息，确定出满足预设条件的目标小区，进一步，将终端设备从源小区切换到目标小区中，其中，该预设条件可以是满足TSN或TSC时钟要求的预设条件，也就是说，当目标小区满足TSN或TSC的时钟要求时，可以将终端设备从源小区切换到该目标小区，避免将终端设备随意切换到一个目标小区，而目标小区不满足TSN或TSC时钟要求时导致的TSN业务或TSC业务时延增大或QoS下降的问题。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图做一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请提供的一种通信系统的示意图；
图2为本申请提供的另一种通信系统的示意图；
图3为本申请提供的再一种通信系统的示意图；
图4为本申请提供的一种小区切换的管理方法的流程图；
图5为本申请提供的另一种小区切换的管理方法的信令图；
图6为本申请提供的另一种小区切换的管理方法的信令图；
图7为本申请提供的另一种小区切换的管理方法的信令图；
图8为本申请提供的再一种小区切换的管理方法的信令图；
图9为本申请提供的再一种通信系统的示意图；
图10为本申请提供的再一种小区切换的管理方法的信令图；
图11为本申请提供的再一种小区切换的管理方法的信令图；
图12为本申请提供的第一通信节点的一种结构示意图；
图13为本申请提供的候选小区对应的网络设备的一种结构示意图；
图14为本申请提供的终端设备的一种结构示意图；
图15为本申请提供的第一通信节点的一种结构示意图；
图16为本申请提供的第三通信节点的一种结构示意图；
图17为本申请提供的第一通信节点的另一种结构示意图；
图18为本申请提供的候选小区对应的网络设备的另一种结构示意图；
图19为本申请提供的终端设备的另一种结构示意图；
图20为本申请提供的第三通信节点的另一种结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，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。
本申请实施例的说明书、权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，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、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
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。
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(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR)系统、NR系统的演进系统、非授权频段上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、非授权频段上的NR(NR-based access to unlicensed spectrum，NR-U)系统、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、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、下一代通信系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现。然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，以及车辆间(Vehicle to Vehicle，V2V)通信等，本申请实施例也可以应用于这些通信系统。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110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110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网络中的网络侧设备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。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端设备120。作为在此使用的“终端设备”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、WLAN、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一终端设备的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System，GPS)接收器的个人数字处理(Personal Digital Assistant，PDA)设备；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端设备可以指接入终端、用户设备(User Equipment，UE)、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、PDA设备、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、5G网络中的终端设备或者未来演进的PLMN中的终端设备等。
可选地，终端设备120之间可以进行D2D通信。
可选地，5G系统还可以称为NR系统，或者5G网络还可以称为NR网络。
图1示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
在图1中，网络设备可以是接入设备，例如可以是NR-U系统中的接入设备，例如5G的NR基站(next generation Node B，gNB)或小站、微站，还可以是中继站、发送和接收点(Transmission and Reception Point，TRP)、路边单元(Road Side Unit,RSU)等。
终端设备也可以称为移动终端、UE、接入终端、用户单元、用户站、移动站、移动台、用户终端、 终端、无线通信设备、用户代理或用户装置。具体可以是智能手机、蜂窝电话、无绳电话、PDA设备、具有无线通信功能的手持设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备等。在本申请实施例中，该终端设备具有与网络设备(例如：蜂窝网络)进行通信的接口。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
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。
本申请实施例的方法可以应用于如图1所示的通信系统中，也可以应用于其它通信场景中。
需要说明的是，在本申请实施例涉及到的小区也称蜂窝小区，是指在蜂窝移动通信系统中，基站所覆盖的区域，或者是基站的一部分例如扇形天线所覆盖的区域。也就是说，小区可以是基站的全向天线所覆盖的全向小区，也可以是基站的定向天线所覆盖的扇区。本实施例以全向小区为例进行示意性说明。
通常在5G IIoT中，5G通信系统可用于传输工业自动化、传输自动化、智能电力等业务，而这些业务对于低时延和可靠性传输的要求较高。因此，需要5G通信系统能够提供更低的时延保证和更高的时间同步精度。而在5G通信系统中，终端设备可能会从一个小区即源小区切换到另一个小区即目标小区，如图2所示，源基站21是源小区31中的终端设备20所连接的基站，在一些场景中，终端设备20需要切换到其他小区，例如目标小区32中。如果源小区31是满足TSN或TSC时钟要求的小区，该终端设备20是需要传输或正在传输TSN业务或TSC业务的终端设备，而目标小区32是不满足TSN或TSC时钟要求的小区，那么若将该终端设备20从源小区31切换到该目标小区32，可能会出现以下几种情况，一种可能的情况是，该终端设备从源小区31切换到该目标小区32后，需要尽快将该终端设备20再次切换到其他满足TSN或TSC时钟要求的小区中，这样会导致TSN业务或TSC业务传输的时延增大。另一种可能的情况是，该终端设备从源小区31切换到该目标小区32后，该终端设备20无法通过目标小区32中的目标基站22继续传输TSN业务或TSC业务，造成TSN业务或TSC业务的QoS下降。为了解决该问题，本实施例提供了一种小区切换的管理方法，下面结合具体的实施例对小区切换的管理方法进行介绍。
在下面的实施例中，第一通信节点可以是源小区对应的源网络设备，例如，源小区中的源基站。第二通信节点可以是终端设备，该终端设备可以是支持TSN业务或TSC业务的终端设备，或者该终端设备可以是具有TSN业务或TSC业务传输能力的终端设备，或者该终端设备正在执行TSN业务或TSC业务传输，再或者该终端设备准备执行TSN业务或TSC业务传输。第三通信节点可以是核心网网元、操作维护管理(Operation Administration and Maintenance，OAM)网元、中心网络控制(Centre Network Control,CNC)网元中的至少一种，其中，核心网网元具体可以是接入和移动性管理实体(Access and Mobility Management Function，AMF)网元。第四通信节点可以是目标小区对应的目标网络设备，例如，目标小区中的目标基站。另外，在一些实施例中，还可以将候选小区对应的网络设备记为第五通信节点，其中，目标小区可以是从候选小区中确定出来的，因此，当该候选小区是目标小区时，第四通信节点和第五通信节点可以是同一个通信节点。当该候选小区不是目标小区时，第四通信节点和第五通信节点可以是不同的通信节点。在一些场景中，指定节点可以是至少一个候选小区对应的网络设备。在另一些场景中，指定节点可以是终端设备。
另外，本申请实施例提供的小区切换的管理方法所适用的通信系统中可以包括OAM网元、CNC网元或AMF网元，也可以不包括OAM网元、CNC网元或AMF网元。
当该通信系统中包括OAM网元、CNC网元或AMF网元时，源基站可以从OAM网元、CNC网元或AMF网元中获取参考时钟信息，或者，源基站还可以从本地获取参考时钟信息，进一步，根据该参考时钟信息确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。
当该通信系统中不包括OAM网元、CNC网元或AMF网元时，源基站可以从指定节点获取参考时钟信息，进一步，根据该参考时钟信息确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。
下面结合具体的通信系统的示意图对该小区切换的管理方法进行介绍。如图3所示，终端设备20当前所处的小区为源小区31，源基站21是该源小区31对应的网络设备，终端设备20当前与源基站21通信连接。小区32、小区33、小区34分别是源小区31的相邻小区，基站23是小区33对应的网络设备，基站24是小区34对应的网络设备。候选小区可以是相邻小区，也可以是相邻小区中的部分小区。
图4为本申请提供的一种小区切换的管理方法的流程图。如图4所示，该小区切换的管理方法包括如下步骤：
S401、第一通信节点从指定节点接收参考时钟信息。
S402、根据所述参考时钟信息，所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
在本实施例中，第一通信节点例如为图3所示的源基站21。指定节点可以是至少一个候选小区对应的网络设备，例如，如果候选小区是源小区31的相邻小区，则指定节点为基站22、基站23和基站24。如果候选小区是相邻小区中的部分节点，例如，候选小区是小区32和小区33，则指定节点为基站22和基站23。另外，指定节点也可能是终端设备20。
具体的，指定节点可以将参考时钟信息发送给源基站21，相应的，源基站21接收该参考时钟信息，进一步，根据该参考时钟信息确定出满足预设条件的目标小区，并发起将终端设备20从源小区31切换到该目标小区的切换流程。
其中，如果该指定节点是至少一个候选小区对应的网络设备，例如，基站22、基站23和基站24，相应的该参考时钟信息可以是小区32的参考时钟信息、小区33的参考时钟信息和小区34的参考时钟信息。也就是说，源基站21可根据小区32、小区33、小区34分别对应的参考时钟信息，确定出小区32、小区33、小区34中满足预设条件的目标小区。
如果该指定节点是终端设备20，相应的该参考时钟信息可以是该终端设备20对至少一个候选小区进行测量后的测量结果。也就是说，源基站21可根据该终端设备20的测量结果，确定出该至少一个候选小区中满足预设条件的目标小区。
本实施例提供的小区切换的管理方法，当终端设备需要从源小区切换到其他小区时，源小区中的网络设备根据从指定节点接收到的参考时钟信息，确定出满足预设条件的目标小区，进一步，将终端设备从源小区切换到目标小区中，其中，该预设条件可以是满足TSN或TSC时钟要求的预设条件，也就是说，当目标小区满足TSN或TSC的时钟要求时，可以将终端设备从源小区切换到该目标小区，避免将终端设备随意切换到一个目标小区，而目标小区不满足TSN或TSC时钟要求时导致的TSN业务或TSC业务时延增大或QoS下降的问题。
在上述实施例的基础上，指定节点可以主动向源基站21发送参考时钟信息。也可以是源基站21向指定节点发送指示消息后，该指定节点根据该指示消息的指示向源基站21发送参考时钟信息，也就是说，该指示消息可用于指示该指定节点向该源基站21反馈该参考时钟信息。下面针对指定节点是终端设备的这种情况，以及指定节点是至少一个候选小区对应的网络设备的这种情况分别进行介绍。
图5为本申请提供的一种小区切换的管理方法的信令图，其中，该指定节点是至少一个候选小区对应的网络设备，例如，基站22和基站23。如图5所示，该小区切换的管理方法包括如下步骤：
S501、源基站21向基站22发送指示消息，该指示消息用于指示基站22反馈小区32对应的参考时钟信息。
S502、基站22向源基站21发送小区32对应的参考时钟信息，相应的，源基站21接收该参考时钟信息。
S503、源基站21向基站23发送指示消息，该指示消息用于指示基站23反馈小区33对应的参考时钟信息。
S504、基站23向源基站21发送小区33对应的参考时钟信息，相应的，源基站21接收该参考时钟信息。
S505、源基站21根据小区32和小区33分别对应的参考时钟信息，确定目标小区。
S506、源基站21向终端设备发送切换指令。
终端设备在接收到该切换指令后，执行空口的切换过程。例如，终端设备向目标小区中的目标基站发送随机接入流程，并且终端设备与源基站断开连接，终端设备的分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)等实体进行重建立。另外，源基站还可以向目标基站发送序列号状态转移(SN STATUS TRANSFER)信息，该信息用于指示上行PDCP序列号(Serial Number，SN)接收 状态和下行PDCP SN发送状态。当终端设备成功接入目标基站即随机接入成功后，目标基站向移动管理节点功能(Mobility Management Entity，MME)网元发送路径切换请求(PATH SWITCH REQUEST)，该请求用于请求MME切换下行路径，当路径切换完成后，目标基站指示源基站释放该终端设备的上下文，从而完成了该终端设备的小区切换。
可以理解的是，本实施例并不限定S501-S506中部分步骤之间的执行顺序，例如，S503可以在S501之前，S504可以在S502之前。
另外，在本实施例中，按照参考时钟信息的类型划分，该参考时钟信息可包括以下至少之一：时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
此外，按照参考时钟信息的内容划分，该参考时钟信息可包括以下至少之一：参考系统帧号(System Frame Number，SFN)、TSC的时钟域(TSC domain index)、TSN的时钟域(TSN domain index)、时间(例如，10点9分8秒10毫秒1微秒)、时钟精度值(例如，1毫秒、10纳秒、1微秒)、时钟精度类型(例如，低精度、正常精度、高精度等)的指示信息、时间信息类型(timeInfoType)、不精确度(uncertainty)。
在一些场景中，小区的参考时钟信息还可以是该小区的参考SFN与该小区的相邻小区的参考SFN的差值、该小区的时钟精度值与该小区的相邻小区的时钟精度值的差值、该小区的时间与该小区的相邻小区的时间的差值中的至少一个。
例如，时钟精度类型的指示信息可以是3个比特的信息位。以1微秒为正常精度，比1微秒高的精度例如10纳秒为高精度，比1微秒低的精度例如1毫秒为低精度。具体的，高精度、低精度或正常精度与该3比特之间的对应关系可如下表1所示：
表1
精度级别 比特
高精度 100
正常精度 010
低精度 001
可以理解的是，表1所示的对应关系只是一种示意性说明，并不做具体限定。
具体的，源基站21根据小区32和小区33分别对应的参考时钟信息，确定目标小区时，该源基站21可根据小区32和小区33分别对应的参考时钟信息，将小区32和小区33中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。也就是说，如上所述的预设条件具体可以是时钟精度高于或等于预设精度阈值，或者如上所述的预设条件具体可以是时钟精度高于或等于源小区的时钟精度。
例如，该参考时钟信息具体为时钟精度值，时钟精度值也可称为时钟同步精度的粒度。例如，小区32的时钟精度值为10纳秒，小区33的时钟精度值为1毫秒，预设精度阈值为1微秒，也就是说，小区32的时钟精度高于预设精度阈值，小区33的时钟精度低于预设精度阈值，为了终端设备在切换到目标小区后还可以正常的传输TSN业务或TSC业务，可以将时钟精度高于预设精度阈值的小区32作为目标小区。再例如，源小区的时钟精度值为1微秒，可见，小区32的时钟精度高于源小区的时钟精度，小区33的时钟精度低于源小区的时钟精度，可以将时钟精度高于源小区的时钟精度的小区32作为目标小区。
可以理解的是，在一些场景中可能会有多个小区满足预设条件，例如，小区32的时钟精度和小区33的时钟精度均高于预设精度阈值，或者均高于源小区的时钟精度，也就是说，目标小区是多个，此时，可以通过几种可能的实现方式，从多个目标小区中确定出终端设备可以切换到的目标小区。例如，可以将多个目标小区中时钟精度最高的小区作为终端设备可以切换到的目标小区。或者，可以将多个目标小区中信道质量最好的小区作为终端设备可以切换到的目标小区。或者，可以将多个目标小区中可接受的承载个数或能保证的承载个数最多的小区作为终端设备可以切换到的目标小区，其中，可接受的承载个数具体可以是能够接受的保证比特速率(Guaranteed Bit Rate，GBR)承载的个数，能保证的承载个数具体可以是能保证的GBR承载个数。或者，可以将多个目标小区中负荷最小的小区作为终端设备可以切换到的目标小区。可以理解的是，此处只是几种举例性说明，还可以通过其他的预设规则从多个目标小区中确定出终端设备可以切换到的目标小区。
另外，可以理解的是，源基站接收到至少一个候选小区对应的网络设备发送的参考时钟信息后，在根据至少一个候选小区对应的网络设备发送的参考时钟信息，确定时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的目标小区时，该源基站可能会确定出该至少一个候选小区的时钟精度均低于 该预设精度阈值或均低于该源小区的时钟精度。或者，该源基站可能会确定出该至少一个候选小区的时钟精度均不同于该预设精度阈值或均不同于该源小区的时钟精度，在这种情况下，源基站可通过如下几种可能的方式来确定目标小区。
一种可能的方式是，该源基站将该至少一个候选小区中信道质量大于预设质量阈值的小区作为目标小区。
另一种可能的方式是，该源基站根据预配置确定该目标小区。
再一种可能的方式是，该源基站将该至少一个候选小区中时钟精度最高的小区作为目标小区。
又一种可能的方式是，该源基站确定切换失败，进一步释放与终端设备之间的连接。
又一种可能的方式是，该源基站从该至少一个候选小区中任选一个候选小区作为目标小区。
此外，源基站在向多个候选小区对应的网络设备发送指示消息后，可能有些候选小区对应的网络设备会向该源基站反馈相应的候选小区的参考时钟信息，但是有些候选小区对应的网络设备可能并不反馈相应的候选小区的参考时钟信息。例如，源基站21向基站22、基站23和基站24分别发送指示消息后，基站22反馈了小区32的参考时钟信息，基站23反馈了小区33的参考时钟信息，而基站24并没有反馈小区34的参考时钟信息，在这种情况下，作为一种可能的实现方式，源基站21在确定目标小区时，可以忽略小区34的参考时钟信息，根据小区32的参考时钟信息和小区33的参考时钟信息来确定该目标小区，例如，源基站21可根据小区32的参考时钟信息确定小区32的时钟精度，根据小区33的参考时钟信息确定小区33的时钟精度，进一步，根据小区32的时钟精度和小区33的时钟精度，确定小区32和小区33被选择为目标小区的优先级顺序，如果小区32的时钟精度高于小区33的时钟精度，则一种优先级顺序为小区32的优先级高于小区33的优先级，另一种优先级顺序为小区33的优先级高于小区32的优先级。作为另一种可能的实现方式，源基站21可以确定小区34不是目标小区。
本实施例提供的小区切换的管理方法，通过源基站向至少一个候选小区对应的网络设备发送指示消息，该指示消息用于指示该至少一个候选小区对应的网络设备向该源基站发送相应的候选小区的参考时钟信息，该源基站进一步根据该至少一个候选小区的参考时钟信息，确定出时钟精度高于预设精度阈值的或与源小区的时钟精度相同的候选小区为目标小区，从而使得该目标小区可以满足TSN或TSC的时钟要求，避免了TSN业务或TSC业务时延增大或QoS下降的问题。
在一些场景中，源基站在向至少一个候选小区对应的网络设备发送指示消息之前，该源基站还可以向至少一个候选小区对应的网络设备发送切换请求消息。当该源基站接收到至少一个候选小区对应的网络设备反馈的切换响应信息，并且该切换响应信息为确认信息(Acknowledge character，ACK)时，源基站向至少一个候选小区对应的网络设备发送指示消息。下面以一个具体的实施例进行介绍。
图6为本申请提供的另一种小区切换的管理方法的信令图，其中，候选小区为小区32和小区33，指定节点为基站22和基站23。如图6所示，该小区切换的管理方法包括如下步骤：
S601、源基站21向基站22发送切换请求消息，该切换请求消息请求基站22反馈终端设备从源小区切换到小区32的切换响应信息。
S602、基站22向源基站21发送切换响应信息，该切换响应信息为ACK，相应的，源基站21接收该切换响应信息。
S603、源基站21向基站23发送切换请求消息，该切换请求消息请求基站23反馈终端设备从源小区切换到小区33的切换响应信息。
S604、基站23向源基站21发送切换响应信息，该切换响应信息为ACK，相应的，源基站21接收该切换响应信息。
S605、源基站21向基站22发送指示消息，该指示消息用于指示基站22反馈小区32对应的参考时钟信息。
S606、基站22向源基站21发送小区32对应的参考时钟信息，相应的，源基站21接收该参考时钟信息。
S607、源基站21向基站23发送指示消息，该指示消息用于指示基站23反馈小区33对应的参考时钟信息。
S608、基站23向源基站21发送小区33对应的参考时钟信息，相应的，源基站21接收该参考时钟信息。
S609、源基站21根据小区32和小区33分别对应的参考时钟信息，确定目标小区。
S610、源基站21向终端设备发送切换指令。
可以理解的是，本实施例并不限定S601-S610中部分步骤之间的执行顺序，例如，S607可以在S605 之前，S608可以在S606之前。另外，S605可以在S602之后执行，S607可以在S604之后执行。
其中，以基站22为例，当基站22接收到该切换请求消息后，基站22进行切换判断，即接入控制，具体的，基站22可根据小区32能够接受的承载个数、能够保证的承载个数、小区32的信道质量、小区32的负载情况等确定终端设备是否可以切换到该小区32中，如果基站22确定终端设备可以切换到该小区32中，则向源基站21发送切换响应信息，该切换响应信息为ACK。如果基站22确定该小区32无法接收该终端设备，则向源基站21发送切换响应信息，该切换响应信息为否定确认信息(Negative ACKnowledgment，NACK)。基站23向源基站21发送切换响应信息的方法与此类似，此处不再赘述。
可以理解的是，如果基站22向源基站21发送的切换响应信息为NACK，则后续步骤中，例如S605中，源基站21将不需要向基站22发送指示消息。同理，如果基站23向源基站21发送的切换响应信息为NACK，则后续步骤中，例如S607中，源基站21将不需要向基站23发送指示消息。
可以理解的是，如果源基站向多个候选小区的网络设备发送切换请求消息后，该多个候选小区的网络设备反馈的切换响应信息均为NACK，例如，源基站21向基站22和基站23分别发送切换请求消息后，基站22和基站23反馈的切换响应信息均为NACK，此时，源基站21可以继续确定至少一个新的候选小区，例如，可以将小区34作为候选小区，进一步，向基站24发送切换请求消息，如果基站24反馈的切换响应信息为ACK，且小区34满足如上所述的预设条件，即可将小区34作为目标小区，并将终端设备20从源小区31切换到目标小区34中。或者，源基站也可以不考虑候选小区的参考时钟信息，选择一个反馈ACK的候选小区进行切换，例如，源基站可以不考虑小区34的参考时钟信息，当基站24反馈的切换响应信息为ACK时，源基站便可将终端设备20从源小区31切换到目标小区34中。如果基站24反馈的切换响应信息为NACK，也就是说，源小区31的相邻小区均无法接收该终端设备，则源基站21可以断开该终端设备与该源基站21的连接，或者源基站21可以不考虑参考时钟信息，选择一个反馈ACK的小区进行切换。
本实施例提供的小区切换的管理方法，通过源基站在向至少一个候选小区对应的网络设备发送指示消息之前，该源基站向至少一个候选小区对应的网络设备发送切换请求消息。当该源基站接收到至少一个候选小区对应的网络设备反馈的切换响应信息，并且该切换响应信息为ACK时，源基站向至少一个候选小区对应的网络设备发送指示消息，若某个候选小区反馈的切换响应信息为NACK，则该源基站不向该候选小区对应的网络设备发送指示消息，从而节省了源基站发送指示消息的资源开销。
在另一些场景中，源基站向至少一个候选小区对应的网络设备发送的指示消息还可以携带在切换请求消息中。至少一个候选小区对应的网络设备反馈的至少一个候选小区的参考时钟信息可以携带在切换响应信息中。例如，在图5的基础上，S501中，源基站21向基站22发送切换请求消息，该切换请求消息中包括指示消息，其中，该切换请求消息和该指示消息的含义具体如上所述，此处不再赘述。同理，S503中，源基站21向基站23发送切换请求消息，该切换请求消息中包括指示消息。S502中，基站22向源基站21发送切换响应信息，该切换响应信息中包括小区32对应的参考时钟信息。同理，S504中，基站23向源基站21发送切换响应信息，该切换响应信息中包括小区33对应的参考时钟信息。该切换响应信息和该参考时钟信息的含义具体如上所述，此处不再赘述。
本实施例提供的小区切换的管理方法，通过源基站向至少一个候选小区对应的网络设备发送的切换请求消息来携带指示消息，以及通过至少一个候选小区对应的网络设备反馈的切换响应信息来携带参考时钟信息，进一步节省了资源开销。
在又一些场景中，源基站可以不在切换请求消息中携带该指示消息，而是由至少一个候选小区对应的网络设备在切换响应信息中自行反馈至少一个候选小区的参考时钟信息。例如，在图5的基础上，S501中，源基站21向基站22发送指示消息，该指示消息并不携带在切换请求消息中。在S502中，基站22向源基站21发送切换响应信息，基站22在该切换响应信息中自行反馈小区32对应的参考时钟信息，也就是说，切换请求消息不携带指示消息，切换响应信息携带参考时钟信息。同理，该方法也适用于S503和S504，此处不再赘述。
在又一些场景中，源基站可以向至少一个候选小区对应的网络设备发送指示消息，并根据至少一个候选小区对应的网络设备反馈的至少一个候选小区对应的参考时钟信息，确定出目标小区后，向该目标小区对应的网络设备发送切换请求消息，并在该目标小区对应的网络设备反馈的切换响应信息为ACK时，源基站向终端设备发送切换指令。如图7所示，在图5的基础上，如果在S505中，源基站21根据小区32和小区33分别对应的指定参考时钟信息，确定目标小区为小区32时，在S506中，源基站21向基站22发送切换请求消息，以请求基站22反馈终端设备从源小区切换到小区32的切换响应信息。 如果在S507中，基站22向源基站21反馈的切换响应信息为ACK，则进一步，在S508中，源基站21向终端设备发送切换指令。也就是说，如果在S507中，基站22向源基站21反馈的切换响应信息为NACK时，源基站21还需要重新确定目标小区。
在上述实施例的基础上，源基站21在向候选小区对应的网络设备或目标小区对应的网络设备发送切换请求消息时，该源基站21还可以将源小区31的参考时钟信息携带在该切换请求消息中，当候选小区对应的网络设备或目标小区对应的网络设备接收到该切换请求消息时，可以根据源小区31的参考时钟信息，确定该候选小区或目标小区的时钟精度是否与该源小区31的时钟精度相同，或者根据源小区31的参考时钟信息确定该候选小区或目标小区是否可以接受该终端设备UE的切换。如果该候选小区或目标小区的时钟精度高于该源小区31的时钟精度，或者，该候选小区或目标小区的时钟精度与该源小区31的时钟精度相同，则该候选小区对应的网络设备或目标小区对应的网络设备确定可以传输TSN业务或TSC业务，进一步，确定向源基站反馈的切换响应信息为ACK。如果候选小区或目标小区的时钟精度低于该源小区31的时钟精度，则该候选小区对应的网络设备或目标小区对应的网络设备确定无法正常传输TSN业务或TSC业务，从而确定该终端设备不能切换到该候选小区或该目标小区，或者确定接入控制失败，或者不发送切换响应信息，或者确定向源基站反馈的切换响应信息为NACK。可以理解的是，如果目标基站是候选小区或目标小区中的网络设备，则该目标基站也可以向源基站反馈候选小区或目标小区的参考时钟信息，由源基站根据候选小区或目标小区的参考时钟信息，判断是否可以将该终端设备切换到该目标小区或该候选小区。
本实施例提供的小区切换的管理方法，通过源基站将源小区的参考时钟信息携带在切换请求消息中，当候选小区对应的网络设备或目标小区对应的网络设备接收到该切换请求消息时，可根据源小区的参考时钟信息，确定该终端设备是否可以切换到该候选小区或该目标小区，提高了该候选小区或该目标小区接入控制的灵活性。
可以理解的是，不论采用上述方法中的哪种方法，当源基站获取到候选小区或目标小区的参考时钟信息后，该源基站可以通过RRC消息或切换命令，将该参考时钟信息发送给UE。UE可以保存该参考时钟信息。所述参考时钟信息可以用于：UE和目标小区之间的TSC同步，UE和目标基站之间的TSC同步，UE和目标小区之间的TSN同步，UE和目标基站之间的TSN同步，UE和目标小区之间的TSC业务传输，UE和目标基站之间的TSC业务传输，测量上报等。
上述实施例介绍了指定节点是至少一个候选小区对应的网络设备的情况，下面将介绍该指定节点是终端设备的情况。图8所示为本申请提供的再一种小区切换的管理方法的流程图，如图8所示，该小区切换的管理方法包括如下步骤：
S801、源基站21向终端设备发送测量配置信息。
如图3所示，源基站21向终端设备20发送测量配置信息，该测量配置信息可包括源基站21指定的至少一个候选小区的标识信息，该测量配置信息用于指示终端设备20获取该至少一个候选小区的参考时钟信息。例如，至少一个候选小区为小区32、小区33和小区34。
S802、终端设备测量至少一个候选小区的参考时钟信息。
具体的，终端设备20分别读取小区32、小区33和小区34的系统信息，并从小区32的系统信息中获取小区32的参考时钟信息，从小区33的系统信息中获取小区33的参考时钟信息，从小区34的系统信息中获取小区34的参考时钟信息。其中，该系统信息具体可以是系统信息块(System Information Block，SIB)1、SIB9、主系统信息块(Master Information Block，MIB)中的至少一种。进一步，终端设备20还可以将小区32、小区33和小区34分别对应的参考时钟信息保存在本地，用于后续的测量上报、终端设备20与目标基站之间的同步(例如，TSC或TSN同步)、终端设备20与目标基站之间的业务传输(例如TSC业务传输)中的至少一种。
S803、终端设备向源基站21发送测量结果。
具体的，该测量配置信息中包括指示消息，在一种可能的情况中，该指示消息用于指示终端设备20反馈由源基站21指定的至少一个候选小区的参考时钟信息。在这种情况下，终端设备20向源基站21发送的测量结果包括小区32、小区33和小区34分别对应的参考时钟信息。
另一种可能的情况中，该指示消息用于指示终端设备20反馈该至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区，或者，该指示消息用于指示终端设备20反馈该至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。在这种情况下，终端设备20在获取到小区32、小区33和小区34分别对应的参考时 钟信息后，进一步，确定小区32、小区33和小区34中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区，例如，小区32的时钟精度高于预设精度阈值，小区33的时钟精度与源小区31的时钟精度相同，小区34的时钟精度低于源小区31的时钟精度，则终端设备20向源基站21发送的测量结果包括小区32和小区33分别对应的参考时钟信息，而不包括小区34的参考时钟信息。
或者，在UE获取到S802中所述的参考时钟信息后，UE仅对时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区进行测量。
S804、源基站21根据测量结果，确定目标小区。
如果该测量结果包括小区32、小区33和小区34分别对应的参考时钟信息，则源基站21可根据小区32、小区33和小区34分别对应的参考时钟信息，确定出小区32、小区33和小区34中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的小区为目标小区，如果目标小区的个数为多个，可以按照上述实施例所述的方法，从多个目标小区中确定出终端设备可以切换到的那个目标小区。
如果该测量结果包括时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的小区的参考时钟信息，例如，小区32和小区33分别对应的参考时钟信息，由于满足预设条件的小区有多个，同样可以根据上述实施例所述的方法，从多个满足预设条件的小区中确定出终端设备可以切换到的那个目标小区。
例如，终端设备可以切换到的目标小区为小区32。
S805、源基站21向基站22发送切换请求消息，该切换请求消息用于请求基站22反馈终端设备20从源小区31切换到目标小区32的切换响应信息。
例如，基站22在接收到切换请求消息后，执行切换判断，即接入控制，以确定终端设备20是否可以切换到该目标小区，进一步，向源基站21发送切换响应信息。
S806、基站22向源基站21发送切换响应信息，该切换响应信息为ACK。
S807、源基站21向终端设备发送切换指令，该切换指令用于指示终端设备20由与源基站21连接切换到与目标小区32中的目标基站22连接。
当该终端设备接收到该切换指令后，执行空口的切换过程，该切换过程具体如上述实施例所述的过程，此处不再赘述。
进一步的，该切换指令还可以包括目标小区32的参考时钟信息，也就是说，源基站21可以通过切换指令，将该目标小区32的参考时钟信息发送给该终端设备20，该终端设备20可以存储该目标小区32的参考时钟信息。
或者，当源基站21确定出满足预设条件的目标小区后，该源基站21还可以向该终端设备20发送无线资源控制(Radio Resource Control，RRC)消息，该RRC消息可以包括该目标小区32的参考时钟信息，也就是说，源基站21还可以通过RRC消息将该目标小区32的参考时钟信息发送给该终端设备20，该终端设备20可以存储该目标小区32的参考时钟信息。
本实施例提供的小区切换的管理方法，通过源基站向终端设备发送测量配置信息，使得终端设备测量至少一个候选小区的参考时钟信息，并将测量结果发送给源基站，源基站根据该测量结果确定目标小区，并向该目标小区发送切换请求消息，当该目标小区反馈的切换响应信息为ACK时，源基站向终端设备发送切换指令，从而使得终端设备由与源基站通信连接切换到与目标小区中的目标基站通信连接，提高了源基站确定目标小区的灵活性。
通过上述实施例可知，源基站可以从至少一个候选小区的网络设备或终端设备获取参考时钟信息，在下面实施例中，该源基站本地可保存有参考时钟信息，或者，该源基站可以从核心网网元或OAM或CNC获取参考时钟信息。如图9所示，网络设备91具体可以是OAM网元、CNC网元或AMF网元，也就是说，网络设备91具体可以是如上所述的第三通信节点。网络设备91可以与源基站21进行通信。
在一种可能的方式中，源基站21可以检测本地保存的参考时钟信息，并根据该参考时钟信息，确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。例如，源基站21本地可存储有源小区31的相邻小区即小区32、小区33和小区34分别对应的参考时钟信息，进一步，根据小区32、小区33和小区34分别对应的参考时钟信息，确定出小区32、小区33和小区34中时钟精度高于预设精度阈值的或与源小区31的时钟精度相同的小区为目标小区。若小区32、小区33和小区34中有两个或以上小区的时钟精度高于预设精度阈值的或与源小区31的时钟精度相同，即目标小区为多个，则可以按照上述实施例所述的方法，确定出多个目标小区中终端设备可以切换到的那个目标小区。或者，源基站21本地可存储有源小区31的相邻小区即小区32、小区33和小区34分别对应的参考时钟信息，源基站21检测本地保存的相邻小区中的至少一个候选小区的参考时钟信息，例如，源基 站21检测候选小区32和候选小区33的参考时钟信息，进一步，根据候选小区32和候选小区33的参考时钟信息，确定出候选小区32和候选小区33中时钟精度高于预设精度阈值的或与源小区31的时钟精度相同的小区为目标小区，并发起终端设备由源小区切换至目标小区的切换流程，该切换流程具体如上所述，此处不再赘述。
在另一种可能的方式中，如图10所示，源基站21从网络设备91获取参考时钟信息，并根据该参考时钟信息，确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。具体包括如下几个步骤：
S1001、源基站21向网络设备91发送第一请求消息，该第一请求消息用于请求网络设备91反馈参考时钟信息。
S1002、网络设备91向源基站21发送参考时钟信息。
S1003、源基站21根据该参考时钟信息，确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。
例如，网络设备91可以存储有源小区31的相邻小区即小区32、小区33和小区34分别对应的参考时钟信息，在S1001中，第一请求消息用于请求网络设备91反馈源小区31的相邻小区的参考时钟信息，相应的，在S1002中，网络设备91向源基站21发送小区32、小区33和小区34分别对应的参考时钟信息。在S1003中，源基站21根据小区32、小区33和小区34分别对应的参考时钟信息，确定小区32、小区33和小区34中时钟精度高于预设精度阈值的或与源小区31的时钟精度相同的小区为目标小区。若小区32、小区33和小区34中有两个或以上小区的时钟精度高于预设精度阈值的或与源小区31的时钟精度相同，即目标小区为多个，则可以按照上述实施例所述的方法，确定出多个目标小区中终端设备可以切换到的那个目标小区。
或者，网络设备91可以存储有源小区31的相邻小区即小区32、小区33和小区34分别对应的参考时钟信息，在S1001中，第一请求消息用于请求网络设备91反馈源小区31的相邻小区中至少一个候选小区的参考时钟信息，相应的，在S1002中，网络设备91向源基站21发送候选小区32和候选小区33的参考时钟信息。在S1003中，源基站21根据候选小区32和候选小区33的参考时钟信息，确定出候选小区32和候选小区33中时钟精度高于预设精度阈值的或与源小区31的时钟精度相同的小区为目标小区，并发起终端设备由源小区切换至目标小区的切换流程，该切换流程具体如上所述，此处不再赘述。
在又一种可能的方式中，该源基站21可以检测本地保存的参考时钟信息，并向网络设备91发送第一请求消息，进一步，该源基站21根据本地保存的参考时钟信息和网络设备91反馈的参考时钟信息，确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程。具体的，目标小区为小区32，目标基站为小区32中的基站22，该切换流程可包括如图11所示的如下几个步骤：
S1004、源基站21向目标基站发送第二请求消息，该第二请求消息用于请求目标基站反馈终端设备由源小区切换到目标小区的切换响应信息。
在本实施例中，该第二请求消息可以是如上所述的切换请求消息。
S1005、目标基站向源基站21发送切换响应信息，该切换响应信息为ACK。
S1006、源基站21向终端设备发送切换指令，该切换指令用于指示终端设备由与源基站21连接切换到与目标基站连接。
可以理解的是，在本实施例中所述的参考时钟信息的含义与上述实施例所述的参考时钟信息的含义一致，此处不再赘述。
另外，该切换指令中还可以包括目标小区的参考时钟信息。也就是说，源基站21可以通过切换指令，将该目标小区32的参考时钟信息发送给该终端设备20，该终端设备20可以存储该目标小区32的参考时钟信息。
或者，当源基站21确定出满足预设条件的目标小区后，该源基站21还可以向该终端设备20发送RRC消息，该RRC消息可以包括该目标小区32的参考时钟信息，也就是说，源基站21还可以通过RRC消息将该目标小区32的参考时钟信息发送给该终端设备20，该终端设备20可以存储该目标小区32的参考时钟信息。
同理，源基站21还可以将本地存储的源小区的相邻小区或至少一个候选小区的参考时钟信息，或者从OAM网元、CNC网元或AMF网元中获取到的该相邻小区或至少一个候选小区的参考时钟信息发送给终端设备，终端设备将该相邻小区或至少一个候选小区的参考时钟信息保存在本地，用于后续的测量上报、终端设备20切换到目标小区后终端设备20与目标基站之间的同步、终端设备20切换到目标小区后终端设备20与目标基站之间的业务传输中的至少一种。
此外，源基站21本地还可以存储有TSN业务或TSC业务传输的时钟要求。或者，OAM网元、CNC网元或AMF网元中存储有TSN业务或TSC业务传输的时钟要求，源基站21从OAM网元、CNC网元或AMF网元中获取该时钟要求。具体的，该时钟要求包括如下至少一种：支持TSN业务或支持TSC业务、支持的TSN业务或TSC业务的类型、支持的TSC domain index、支持的TSN domain index、支持高精度还是低精度、支持的精度粒度。具体的，源基站在确定满足预设条件的目标小区时，可根据该时钟要求和相邻小区的参考时钟信息，确定参考时钟信息满足该时钟要求的相邻小区为目标小区。或者，源基站可根据该时钟要求和至少一个候选小区的参考时钟信息，确定参考时钟信息满足该时钟要求的候选小区为目标小区。
在其他一些实施例中，OAM网元、CNC网元或AMF网元还可以用于存储如下至少一种：源小区与其相邻小区的位置关系，源小区的参考时钟信息，相邻小区的参考时钟信息，源小区的参考时钟信息与相邻小区的参考时钟信息之间的差值。其中，源小区的参考时钟信息和相邻小区的参考时钟信息可以分别包括以下至少之一：参考系统帧号(System Frame Number，SFN)、TSC的时钟域(TSC domain index)、TSN的时钟域(TSN domain index)、时间(例如，10点9分8秒10毫秒1微秒)、时钟精度值(例如，1毫秒、10纳秒、1微秒)、时钟精度类型(例如，低精度、正常精度、高精度等)的指示信息、时间信息类型(timeInfoType)、不精确度(uncertainty)。源小区的参考时钟信息与相邻小区的参考时钟信息之间的差值可以包括如下至少一种：源小区的参考SFN与相邻小区的参考SFN的差值，源小区的时钟精度值与相邻小区的时钟精度值的差值，源小区的时间与相邻小区的时间的差值。也就是说，源基站不仅可以从OAM网元、CNC网元或AMF网元中获取相邻小区的参考时钟信息，还可以从OAM网元、CNC网元或AMF网元中请求获取如下至少一种：源小区与其相邻小区的位置关系，源小区的参考时钟信息，源小区的参考时钟信息与相邻小区的参考时钟信息之间的差值。
另外，在一些实施例中，当源小区确定有多个满足预设条件的目标小区时，该源小区还可以将该多个目标小区的标识信息发送给OAM网元、CNC网元或AMF网元，该OAM网元、CNC网元或AMF网元可以根据该多个目标小区的参考时钟信息，确定出多个目标小区作为终端设备可切换到的目标小区的优先级排序。进一步，OAM网元、CNC网元或AMF网元将该优先级排序发送给源小区，源小区根据该优先级排序确定终端设备可切换到的目标小区。
本实施例提供的小区切换的管理方法，通过源基站检测本地保存的参考时钟信息，和/或从OAM网元、CNC网元或AMF网元中获取参考时钟信息，进一步，根据该参考时钟信息，确定满足预设条件的目标小区，并发起终端设备由源小区切换至目标小区的切换流程，进一步，提高了源基站确定目标小区的灵活性。
图12为本申请提供的第一通信节点的一种结构示意图，如图12所示，该第一通信节点120包括：
接收模块121，用于从指定节点接收参考时钟信息；
确定模块122，用于根据所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
本实施例提供的第一通信节点，用于执行前述任一方法实施例中第一通信节点侧的技术方案，其实现原理和技术效果类似，此处不再赘述。
在上述图12所示的实施例的基础上，所述第一通信节点还包括：发送模块123，用于接收模块121从指定节点接收参考时钟信息之前，向所述指定节点发送指示消息，其中，所述指示消息用于指示所述指定节点发送所述指定节点对应小区的参考时钟信息。
可选地，在所述指定节点为至少一个候选小区对应的网络设备的情况下，发送模块123具体：用于向所述至少一个候选小区对应的网络设备发送所述指示消息，所述指示消息用于指示所述至少一个候选小区对应的网络设备发送所述至少一个候选小区对应的所述参考时钟信息；所述确定模块具体用于：根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区；发送模块123还用于：向第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
可选地，发送模块123向所述至少一个候选小区对应的网络设备发送所述指示消息时，具体用于：向所述至少一个候选小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述至少一个候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；向所述切换响应信息为ACK的候选小区对应的网络设备发送所述指示消息。
可选地，发送模块123向所述至少一个候选小区对应的网络设备发送所述指示消息时，具体用于： 向所述至少一个候选小区对应的网络设备发送切换请求消息，所述切换请求消息包括所述指示消息；接收模块121从指定节点接收参考时钟信息时，具体用于：从所述至少一个候选小区对应的网络设备接收所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
可选地，发送模块123还用于：在所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区之后，向所述目标小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息；发送模块123向第二通信节点发送切换指令时，具体用于：当所述目标小区对应的网络设备发送的所述切换响应信息为ACK时，向所述第二通信节点发送所述切换指令。
可选地，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备或所述目标小区对应的网络设备确定所述切换响应信息是否为ACK。
可选地，所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区时，具体用于：确定时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
可选地，在所述确定模块确定所述至少一个候选小区的时钟精度均低于所述预设精度阈值或均低于所述源小区的时钟精度的情况下，或者，在确定所述至少一个候选小区的时钟精度均不同于所述预设精度阈值或均不同于所述源小区的时钟精度的情况下，所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区时，具体用于如下至少一种：确定所述至少一个候选小区中信道质量大于预设质量阈值的小区为所述目标小区；根据预配置确定所述目标小区；确定所述至少一个候选小区中时钟精度最高的小区为目标小区；确定切换失败。
可选地，在所述指定节点为与所述第一通信节点连接的终端设备的情况下，发送模块123具体用于向所述终端设备发送测量配置信息，其中，所述测量配置信息用于指示所述终端设备获取至少一个候选小区的参考时钟信息；所述确定模块具体用于：根据所述终端设备反馈的测量结果，确定所述目标小区；发送模块123还用于：向所述目标小区发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备反馈所述终端设备由所述源小区切换至所述目标小区的切换响应信息；在确定接收到的所述切换响应信息为ACK时，向所述终端设备发送切换指令，所述切换指令用于指示所述终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
可选地，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息。
可选地，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区；或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
可选地，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
可选地，所述切换指令包括所述目标小区的参考时钟信息。
可选地，发送模块123还用于：所述确定模块确定满足预设条件的目标小区之后，向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
图13为本申请提供的候选小区对应的网络设备的一种结构示意图，如图13所示，该候选小区对应的网络设备130包括：
确定模块131，用于确定向第一通信节点发送的参考时钟信息；
发送模块132，用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
本实施例提供的候选小区对应的网络设备，用于执行前述任一方法实施例中候选小区对应的网络设备侧的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述网络设备还包括：接收模块133，用于所述发送模块向第一通信节点发送参考时钟信息之前，从所述所述第一通信节点接收指示消息，其中，所述指示消息用于指示所述候选小区对应的网络设备发送所述候选小区的参考时钟信息。
可选地，所述接收模块从所述第一通信节点接收指示消息时，具体用于：从所述所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；当所述候选小区对应的网络设备发送的切换响应信息为ACK时，从所述第一通信节点接收所述指示消息。
可选地，所述接收模块从所述第一通信节点接收指示消息时，具体用于：从所述第一通信节点接收切换请求消息，所述切换请求消息包括所述指示消息；所述发送模块向第一通信节点发送参考时钟信息时，具体用于：向所述第一通信节点发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
可选地，当所述候选小区为所述第一通信节点确定满足的预设条件的目标小区时，所述接收模块还用于：从所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息。
可选地，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备确定所述切换响应信息是否为ACK。
可选地，所述参考时钟信息包括以下至少之一：时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
可选地，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
图14为本申请提供的终端设备的一种结构示意图，如图14所示，该终端设备140包括：确定模块141、发送模块142，其中，确定模块141用于确定向第一通信节点发送的参考时钟信息；发送模块142用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
本实施例提供的终端设备，用于执行前述任一方法实施例中终端设备侧的技术方案，其实现原理和技术效果类似，此处不再赘述。
在上述图14所示的实施例的基础上，所述终端设备还包括：接收模块143和获取模块144；其中，接收模块143用于所述发送模块向第一通信节点发送参考时钟信息之前，从所述第一通信节点接收测量配置信息；获取模块144用于根据所述测量配置信息，获取至少一个候选小区的参考时钟信息。
可选地，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息；所述发送模块向第一通信节点发送参考时钟信息时，具体用于：向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区的参考时钟信息。
可选地，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区，或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息；所述发送模块向第一通信节点发送参考时钟信息时，具体用于：向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
可选地，所述获取模块获取至少一个候选小区的参考时钟信息时，具体用于：读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息。
可选地，所述接收模块还用于：所述发送模块向所述第一通信节点发送测量结果之后，从所述第一通信节点接收切换指令，所述切换指令用于指示所述终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
可选地，所述终端设备还包括：存储模块145，用于所述获取模块读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息之后，保存所述至少一个候选小区的参考时钟信息，所述至少一个候选小区的参考时钟信息用于如下至少一种：所述终端设备向所述第一通信节点进行测量上报；所述终端设备与所述目标小区对应的网络设备进行同步；所述终端设备与 所述目标小区对应的网络设备进行业务传输。
图15为本申请提供的第一通信节点的一种结构示意图，如图15所示，该第一通信节点150包括：检测模块151和/或发送模块152，以及确定模块153；其中，检测模块151用于检测本地保存的参考时钟信息；发送模块152用于向第三通信节点发送第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息；确定模块153用于根据获取到的所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
可选地，所述参考时钟信息为所述源小区的相邻小区的参考时钟信息；所述确定模块确定满足预设条件的目标小区时，具体用于：确定所述相邻小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的小区为所述目标小区。
可选地，所述参考时钟信息为所述源小区的相邻小区中至少一个候选小区的参考时钟信息；所述确定模块确定满足预设条件的目标小区时，具体用于：确定所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
可选地，所述第一通信节点发起第二通信节点由源小区切换至目标小区的切换流程时，所述发送模块具体用于向第四通信节点发送第二请求消息，其中，所述第二请求消息用于请求所述第四通信节点反馈所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息，所述第四通信节点属于所述目标小区；在确定接收到的所述切换响应信息为ACK时，所述发送模块向所述第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述第四通信节点连接。
可选地，所述参考时钟信息包括以下至少之一：时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
可选地，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备；所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个；所述第四通信节点至少包括：所述目标小区对应的目标网络设备。
可选地，所述切换指令包括所述目标小区的参考时钟信息。
可选地，所述确定模块确定满足预设条件的目标小区之后，所述发送模块还用于：向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
图16为本申请提供的第三通信节点的一种结构示意图，如图16所示，该第三通信节点160包括：接收模块161和发送模块162；其中，接收模块161用于接收第一通信节点发送的第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接；发送模块162用于向所述第一通信节点发送所述反馈参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
可选地，所述参考时钟信息包括以下至少之一：参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
可选地，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备；所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个。
图17为本申请提供的第一通信节点的另一种结构示意图，如图17所示，该第一通信节点170包括：
处理器171、存储器172、通信接口173；
所述存储器172存储计算机执行指令；
所述处理器171执行所述存储器172存储的计算机执行指令，使得所述处理器171执行前述任一方法实施例中第一通信节点侧的技术方案。
图17为第一通信节点的一种简单设计，本申请实施例不限制第一通信节点中处理器和存储器的个数，图17仅以个数为1作为示例说明。
图18为本申请提供的候选小区对应的网络设备的另一种结构示意图，如图18所示，该候选小区对应的网络设备180包括：
处理器181、存储器182、通信接口183；
所述存储器182存储计算机执行指令；
所述处理器181执行所述存储器182存储的计算机执行指令，使得所述处理器181执行前述任一方法实施例中候选小区对应的网络设备侧的技术方案。
图18为候选小区对应的网络设备的一种简单设计，本申请实施例不限制候选小区对应的网络设备中处理器和存储器的个数，图18仅以个数为1作为示例说明。
图19为本申请提供的终端设备的另一种结构示意图，如图19所示，该终端设备190包括：
处理器191、存储器192、通信接口193；
所述存储器192存储计算机执行指令；
所述处理器191执行所述存储器192存储的计算机执行指令，使得所述处理器191执行前述任一方法实施例中终端设备侧的技术方案。
图19为终端设备的一种简单设计，本申请实施例不限制终端设备中处理器和存储器的个数，图19仅以个数为1作为示例说明。
图20为本申请提供的第三通信节点的另一种结构示意图，如图20所示，该第三通信节点200包括：
处理器201、存储器202、通信接口203；
所述存储器202存储计算机执行指令；
所述处理器201执行所述存储器202存储的计算机执行指令，使得所述处理器201执行前述任一方法实施例中第三通信节点侧的技术方案。
图20为第三通信节点的一种简单设计，本申请实施例不限制第三通信节点中处理器和存储器的个数，图20仅以个数为1作为示例说明。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现前述任一方法实施例中所述的小区切换的管理方法。
本申请实施例还提供一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行前述任一方法实施例中所述的小区切换的管理方法。
本申请实施例还提供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前述任一方法实施例中所述的小区切换的管理方法。
本申请实施例还提供一种计算机程序，该计算机程序使得计算机执行前述任一方法实施例中所述的小区切换的管理方法。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。例如，以上所描述的设备实施例仅仅是示意性的，例如，所述模块的划分，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，例如多个模块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，模块的间接耦合或通信连接，可以是电性，机械或其它的形式。
在上述终端设备和网络设备的具体实现中，应理解，处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)等。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。结合本申请所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一可读取存储器中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储器(存储介质)包括：只读存储器(read-only memory，ROM)、RAM、快闪存储器、硬盘、固态硬盘、磁带(magnetic tape)、软盘(floppy disk)、光盘(optical disc)及其任意组合。

Claims (100)

  1. 一种小区切换的管理方法，其特征在于，所述方法包括：
    第一通信节点从指定节点接收参考时钟信息；
    根据所述参考时钟信息，所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  2. 根据权利要求1所述的方法，其特征在于，所述第一通信节点从指定节点接收参考时钟信息之前，所述方法还包括：
    所述第一通信节点向所述指定节点发送指示消息，其中，所述指示消息用于指示所述指定节点发送所述指定节点对应小区的参考时钟信息。
  3. 根据权利要求2所述的方法，其特征在于，在所述指定节点为至少一个候选小区对应的网络设备的情况下，所述方法包括：
    所述第一通信节点向所述至少一个候选小区对应的网络设备发送所述指示消息，所述指示消息用于指示所述至少一个候选小区对应的网络设备发送所述至少一个候选小区对应的所述参考时钟信息；
    根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，所述第一通信节点确定所述目标小区；
    所述第一通信节点向第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  4. 根据权利要求3所述的方法，其特征在于，所述第一通信节点向所述至少一个候选小区对应的网络设备发送所述指示消息，包括：
    所述第一通信节点向所述至少一个候选小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述至少一个候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；
    所述第一通信节点向所述切换响应信息为ACK的候选小区对应的网络设备发送所述指示消息。
  5. 根据权利要求3所述的方法，其特征在于，所述第一通信节点向所述至少一个候选小区对应的网络设备发送所述指示消息，包括：
    所述第一通信节点向所述至少一个候选小区对应的网络设备发送切换请求消息，所述切换请求消息包括所述指示消息；
    所述第一通信节点从指定节点接收参考时钟信息，包括：
    所述第一通信节点从所述至少一个候选小区对应的网络设备接收所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
  6. 根据权利要求3所述的方法，其特征在于，根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，所述第一通信节点确定所述目标小区之后，所述方法还包括：
    所述第一通信节点向所述目标小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息；
    所述第一通信节点向第二通信节点发送切换指令，包括：
    当所述目标小区对应的网络设备发送的所述切换响应信息为ACK时，所述第一通信节点向所述第二通信节点发送所述切换指令。
  7. 根据权利要求4-6任一项所述的方法，其特征在于，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备或所述目标小区对应的网络设备确定所述切换响应信息是否为ACK。
  8. 根据权利要求7所述的方法，其特征在于，根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，所述第一通信节点确定所述目标小区，包括：
    所述第一通信节点确定时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
  9. 根据权利要求8所述的方法，其特征在于，在确定所述至少一个候选小区的时钟精度均低于所述预设精度阈值或均低于所述源小区的时钟精度的情况下，或者，在确定所述至少一个候选小区的时钟精度均不同于所述预设精度阈值或均不同于所述源小区的时钟精度的情况下，根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，所述第一通信节点确定所述目标小区，包括以下至少之一：
    所述第一通信节点确定所述至少一个候选小区中信道质量大于预设质量阈值的小区为所述目标小区；
    所述第一通信节点根据预配置确定所述目标小区；
    所述第一通信节点确定所述至少一个候选小区中时钟精度最高的小区为目标小区；
    所述第一通信节点确定切换失败。
  10. 根据权利要求1所述的方法，其特征在于，在所述指定节点为与所述第一通信节点连接的终端设备的情况下，所述方法包括：
    所述第一通信节点向所述终端设备发送测量配置信息，其中，所述测量配置信息用于指示所述终端设备获取至少一个候选小区的参考时钟信息；
    根据所述终端设备反馈的测量结果，所述第一通信节点确定所述目标小区；
    所述第一通信节点向所述目标小区发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备反馈所述终端设备由所述源小区切换至所述目标小区的切换响应信息；
    在确定接收到的所述切换响应信息为ACK时，所述第一通信节点向所述终端设备发送切换指令，所述切换指令用于指示所述终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  11. 根据权利要求10所述的方法，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息。
  12. 根据权利要求10所述的方法，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区；或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
  13. 根据权利要求1-12任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  14. 根据权利要求1-12任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  15. 根据权利要求1-9任一项所述的方法，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
  16. 根据权利要求3-9任一项所述的方法，其特征在于，所述切换指令包括所述目标小区的参考时钟信息。
  17. 根据权利要求1-9任一项所述的方法，其特征在于，所述第一通信节点确定满足预设条件的目标小区之后，所述方法还包括：
    所述第一通信节点向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
  18. 一种小区切换的管理方法，其特征在于，所述方法包括：
    候选小区对应的网络设备向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  19. 根据权利要求18所述的方法，其特征在于，所述候选小区对应的网络设备向第一通信节点发送参考时钟信息之前，所述方法还包括：
    所述候选小区对应的网络设备从所述所述第一通信节点接收指示消息，其中，所述指示消息用于指示所述候选小区对应的网络设备发送所述候选小区的参考时钟信息。
  20. 根据权利要求19所述的方法，其特征在于，所述候选小区对应的网络设备从所述第一通信节点接收指示消息，包括：
    所述候选小区对应的网络设备从所述所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；
    当所述候选小区对应的网络设备发送的切换响应信息为ACK时，所述候选小区对应的网络设备从所述第一通信节点接收所述指示消息。
  21. 根据权利要求19所述的方法，其特征在于，所述候选小区对应的网络设备从所述第一通信节 点接收指示消息，包括：
    所述候选小区对应的网络设备从所述第一通信节点接收切换请求消息，所述切换请求消息包括所述指示消息；
    所述候选小区对应的网络设备向第一通信节点发送参考时钟信息，包括：
    所述候选小区对应的网络设备向所述第一通信节点发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
  22. 根据权利要求19所述的方法，其特征在于，当所述候选小区为所述第一通信节点确定满足的预设条件的目标小区时，所述方法还包括：
    所述候选小区对应的网络设备从所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息。
  23. 根据权利要求20-22任一项所述的方法，其特征在于，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备确定所述切换响应信息是否为ACK。
  24. 根据权利要求18-23任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  25. 根据权利要求18-23任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  26. 根据权利要求18-25任一项所述的方法，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
  27. 一种小区切换的管理方法，其特征在于，所述方法包括：
    终端设备向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  28. 根据权利要求27所述的方法，其特征在于，所述终端设备向第一通信节点发送参考时钟信息之前，所述方法还包括：
    所述终端设备从所述第一通信节点接收测量配置信息；
    根据所述测量配置信息，所述终端设备获取至少一个候选小区的参考时钟信息。
  29. 根据权利要求28所述的方法，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息；
    所述终端设备向第一通信节点发送参考时钟信息，包括：
    所述终端设备向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区的参考时钟信息。
  30. 根据权利要求28所述的方法，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区，或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息；
    所述终端设备向第一通信节点发送参考时钟信息，包括：
    所述终端设备向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
  31. 根据权利要求28-30任一项所述的方法，其特征在于，所述终端设备获取至少一个候选小区的参考时钟信息，包括：
    所述终端设备读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息。
  32. 根据权利要求29或30所述的方法，其特征在于，所述终端设备向所述第一通信节点发送测量结果之后，所述方法还包括：
    所述终端设备从所述第一通信节点接收切换指令，所述切换指令用于指示所述终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  33. 根据权利要求31所述的方法，其特征在于，所述终端设备读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息之后，所述方法还包括：
    所述终端设备保存所述至少一个候选小区的参考时钟信息，所述至少一个候选小区的参考时钟信息用于如下至少一种：
    所述终端设备向所述第一通信节点进行测量上报；
    所述终端设备与所述目标小区对应的网络设备进行同步；
    所述终端设备与所述目标小区对应的网络设备进行业务传输。
  34. 一种小区切换的管理方法，其特征在于，所述方法包括：
    第一通信节点检测本地保存的参考时钟信息，和/或，第一通信节点向第三通信节点发送第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息；
    根据获取到的所述参考时钟信息，所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
  35. 根据权利要求34所述的方法，其特征在于，所述参考时钟信息为所述源小区的相邻小区的参考时钟信息；
    所述第一通信节点确定满足预设条件的目标小区，包括：
    所述第一通信节点确定所述相邻小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的小区为所述目标小区。
  36. 根据权利要求34所述的方法，其特征在于，所述参考时钟信息为所述源小区的相邻小区中至少一个候选小区的参考时钟信息；
    所述第一通信节点确定满足预设条件的目标小区，包括：
    所述第一通信节点确定所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
  37. 根据权利要求34-36任一项所述的方法，其特征在于，所述第一通信节点发起第二通信节点由源小区切换至目标小区的切换流程，包括：
    所述第一通信节点向第四通信节点发送第二请求消息，其中，所述第二请求消息用于请求所述第四通信节点反馈所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息，所述第四通信节点属于所述目标小区；
    在确定接收到的所述切换响应信息为ACK时，所述第一通信节点向所述第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述第四通信节点连接。
  38. 根据权利要求34-37任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  39. 根据权利要求34-37任一项所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  40. 根据权利要求34-37任一项所述的方法，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；
    所述第二通信节点至少包括：终端设备；
    所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个；
    第四通信节点至少包括：所述目标小区对应的目标网络设备。
  41. 根据权利要求37-40任一项所述的方法，其特征在于，所述切换指令包括所述目标小区的参考时钟信息。
  42. 根据权利要求34-40任一项所述的方法，其特征在于，所述第一通信节点确定满足预设条件的目标小区之后，所述方法还包括：
    所述第一通信节点向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
  43. 一种小区切换的管理方法，其特征在于，所述方法包括：
    第三通信节点接收第一通信节点发送的第一请求消息，其中，所述第一请求消息用于请求所述第三 通信节点反馈参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
  44. 根据权利要求43所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  45. 根据权利要求43所述的方法，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  46. 根据权利要求43所述的方法，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；
    所述第二通信节点至少包括：终端设备；
    所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个。
  47. 一种第一通信节点，其特征在于，包括：
    接收模块，用于从指定节点接收参考时钟信息；
    确定模块，用于根据所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  48. 根据权利要求47所述的第一通信节点，其特征在于，所述第一通信节点还包括：发送模块，用于所述接收模块从指定节点接收参考时钟信息之前，向所述指定节点发送指示消息，其中，所述指示消息用于指示所述指定节点发送所述指定节点对应小区的参考时钟信息。
  49. 根据权利要求48所述的第一通信节点，其特征在于，在所述指定节点为至少一个候选小区对应的网络设备的情况下，所述发送模块具体：用于向所述至少一个候选小区对应的网络设备发送所述指示消息，所述指示消息用于指示所述至少一个候选小区对应的网络设备发送所述至少一个候选小区对应的所述参考时钟信息；所述确定模块具体用于：根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区；所述发送模块还用于：向第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  50. 根据权利要求49所述的第一通信节点，其特征在于，所述发送模块向所述至少一个候选小区对应的网络设备发送所述指示消息时，具体用于：
    向所述至少一个候选小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述至少一个候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；
    向所述切换响应信息为ACK的候选小区对应的网络设备发送所述指示消息。
  51. 根据权利要求49所述的第一通信节点，其特征在于，所述发送模块向所述至少一个候选小区对应的网络设备发送所述指示消息时，具体用于：
    向所述至少一个候选小区对应的网络设备发送切换请求消息，所述切换请求消息包括所述指示消息；
    所述接收模块从指定节点接收参考时钟信息时，具体用于：
    从所述至少一个候选小区对应的网络设备接收所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
  52. 根据权利要求49所述的第一通信节点，其特征在于，所述发送模块还用于：在所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区之后，向所述目标小区对应的网络设备发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息；
    所述发送模块向第二通信节点发送切换指令时，具体用于：当所述目标小区对应的网络设备发送的所述切换响应信息为ACK时，向所述第二通信节点发送所述切换指令。
  53. 根据权利要求50-52任一项所述的第一通信节点，其特征在于，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备或所述目标小区对应的网络设备确定所述切换响应信息是否为ACK。
  54. 根据权利要求53所述的第一通信节点，其特征在于，所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区时，具体用于：
    确定时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
  55. 根据权利要求54所述的第一通信节点，其特征在于，在所述确定模块确定所述至少一个候选小区的时钟精度均低于所述预设精度阈值或均低于所述源小区的时钟精度的情况下，或者，在确定所述至少一个候选小区的时钟精度均不同于所述预设精度阈值或均不同于所述源小区的时钟精度的情况下，所述确定模块根据所述至少一个候选小区对应的网络设备发送的所述参考时钟信息，确定所述目标小区时，具体用于如下至少一种：
    确定所述至少一个候选小区中信道质量大于预设质量阈值的小区为所述目标小区；
    根据预配置确定所述目标小区；
    确定所述至少一个候选小区中时钟精度最高的小区为目标小区；
    确定切换失败。
  56. 根据权利要求48所述的第一通信节点，其特征在于，在所述指定节点为与所述第一通信节点连接的终端设备的情况下，所述发送模块具体用于向所述终端设备发送测量配置信息，其中，所述测量配置信息用于指示所述终端设备获取至少一个候选小区的参考时钟信息；所述确定模块具体用于：根据所述终端设备反馈的测量结果，确定所述目标小区；所述发送模块还用于：向所述目标小区发送切换请求消息，其中，所述切换请求消息用于请求所述目标小区对应的网络设备反馈所述终端设备由所述源小区切换至所述目标小区的切换响应信息；在确定接收到的所述切换响应信息为ACK时，向所述终端设备发送切换指令，所述切换指令用于指示所述终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  57. 根据权利要求56所述的第一通信节点，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息。
  58. 根据权利要求56所述的第一通信节点，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区；或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
  59. 根据权利要求47-58任一项所述的第一通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  60. 根据权利要求47-58任一项所述的第一通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  61. 根据权利要求47-55任一项所述的第一通信节点，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
  62. 根据权利要求49-55任一项所述的第一通信节点，其特征在于，所述切换指令包括所述目标小区的参考时钟信息。
  63. 根据权利要求48-55任一项所述的第一通信节点，其特征在于，所述发送模块还用于：所述确定模块确定满足预设条件的目标小区之后，向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
  64. 一种候选小区对应的网络设备，其特征在于，包括：
    确定模块，用于确定向第一通信节点发送的参考时钟信息；
    发送模块，用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  65. 根据权利要求64所述的网络设备，其特征在于，所述网络设备还包括：接收模块，用于所述发送模块向第一通信节点发送参考时钟信息之前，从所述所述第一通信节点接收指示消息，其中，所述指示消息用于指示所述候选小区对应的网络设备发送所述候选小区的参考时钟信息。
  66. 根据权利要求65所述的网络设备，其特征在于，所述接收模块从所述第一通信节点接收指示消息时，具体用于：
    从所述所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息；
    当所述候选小区对应的网络设备发送的切换响应信息为ACK时，从所述第一通信节点接收所述指示消息。
  67. 根据权利要求65所述的网络设备，其特征在于，所述接收模块从所述第一通信节点接收指示消息时，具体用于：
    从所述第一通信节点接收切换请求消息，所述切换请求消息包括所述指示消息；
    所述发送模块向第一通信节点发送参考时钟信息时，具体用于：
    向所述第一通信节点发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息，所述切换响应信息包括所述参考时钟信息。
  68. 根据权利要求65所述的网络设备，其特征在于，当所述候选小区为所述第一通信节点确定满足的预设条件的目标小区时，所述接收模块还用于：从所述第一通信节点接收切换请求消息，其中，所述切换请求消息用于请求所述候选小区对应的网络设备发送所述第二通信节点由所述源小区切换至所述候选小区的切换响应信息。
  69. 根据权利要求66-68任一项所述的网络设备，其特征在于，所述切换请求消息还包括：所述源小区的参考时钟信息，所述源小区的参考时钟信息用于所述候选小区对应的网络设备确定所述切换响应信息是否为ACK。
  70. 根据权利要求64-69任一项所述的网络设备，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  71. 根据权利要求64-69任一项所述的网络设备，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  72. 根据权利要求64-71任一项所述的网络设备，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；所述第二通信节点至少包括：终端设备。
  73. 一种终端设备，其特征在于，包括：
    确定模块，用于确定向第一通信节点发送的参考时钟信息；
    发送模块，用于向第一通信节点发送参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第二通信节点与所述第一通信节点连接，所述第一通信节点属于所述源小区。
  74. 根据权利要求73所述的终端设备，其特征在于，所述终端设备还包括：接收模块和获取模块；
    所述接收模块用于所述发送模块向第一通信节点发送参考时钟信息之前，从所述第一通信节点接收测量配置信息；
    所述获取模块用于根据所述测量配置信息，获取至少一个候选小区的参考时钟信息。
  75. 根据权利要求74所述的终端设备，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区的参考时钟信息；
    所述发送模块向第一通信节点发送参考时钟信息时，具体用于：向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区的参考时钟信息。
  76. 根据权利要求74所述的终端设备，其特征在于，所述测量配置信息包括指示消息，所述指示消息用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区，或者，用于指示所述终端设备反馈所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息；
    所述发送模块向第一通信节点发送参考时钟信息时，具体用于：向所述第一通信节点发送测量结果，所述测量结果包括所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区的参考时钟信息。
  77. 根据权利要求74-76任一项所述的终端设备，其特征在于，所述获取模块获取至少一个候选小区的参考时钟信息时，具体用于：
    读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息。
  78. 根据权利要求75或76所述的终端设备，其特征在于，所述接收模块还用于：所述发送模块向所述第一通信节点发送测量结果之后，从所述第一通信节点接收切换指令，所述切换指令用于指示所述 终端设备由与所述第一通信节点连接切换至与所述目标小区对应的网络设备连接。
  79. 根据权利要求77所述的终端设备，其特征在于，所述终端设备还包括：存储模块，用于所述获取模块读取所述至少一个候选小区的系统信息，并从所述系统信息中获取所述至少一个候选小区的参考时钟信息之后，保存所述至少一个候选小区的参考时钟信息，所述至少一个候选小区的参考时钟信息用于如下至少一种：
    所述终端设备向所述第一通信节点进行测量上报；
    所述终端设备与所述目标小区对应的网络设备进行同步；
    所述终端设备与所述目标小区对应的网络设备进行业务传输。
  80. 一种第一通信节点，其特征在于，包括：检测模块和/或发送模块，以及确定模块；
    所述检测模块用于检测本地保存的参考时钟信息；
    所述发送模块用于向第三通信节点发送第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息；
    所述确定模块用于根据获取到的所述参考时钟信息，确定满足预设条件的目标小区，并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接。
  81. 根据权利要求80所述的第一通信节点，其特征在于，所述参考时钟信息为所述源小区的相邻小区的参考时钟信息；
    所述确定模块确定满足预设条件的目标小区时，具体用于：确定所述相邻小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的小区为所述目标小区。
  82. 根据权利要求80所述的第一通信节点，其特征在于，所述参考时钟信息为所述源小区的相邻小区中至少一个候选小区的参考时钟信息；
    所述确定模块确定满足预设条件的目标小区时，具体用于：确定所述至少一个候选小区中时钟精度高于预设精度阈值的或与所述源小区的时钟精度相同的候选小区作为所述目标小区。
  83. 根据权利要求80-82任一项所述的第一通信节点，其特征在于，所述第一通信节点发起第二通信节点由源小区切换至目标小区的切换流程时，所述发送模块具体用于向第四通信节点发送第二请求消息，其中，所述第二请求消息用于请求所述第四通信节点反馈所述第二通信节点由所述源小区切换至所述目标小区的切换响应信息，所述第四通信节点属于所述目标小区；在确定接收到的所述切换响应信息为ACK时，所述发送模块向所述第二通信节点发送切换指令，所述切换指令用于指示所述第二通信节点由与所述第一通信节点连接切换至与所述第四通信节点连接。
  84. 根据权利要求80-83任一项所述的第一通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  85. 根据权利要求80-83任一项所述的第一通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  86. 根据权利要求80-83任一项所述的第一通信节点，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；
    所述第二通信节点至少包括：终端设备；
    所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个；
    第四通信节点至少包括：所述目标小区对应的目标网络设备。
  87. 根据权利要求83-86任一项所述的第一通信节点，其特征在于，所述切换指令包括所述目标小区的参考时钟信息。
  88. 根据权利要求83-86任一项所述的第一通信节点，其特征在于，所述确定模块确定满足预设条件的目标小区之后，所述发送模块还用于：向所述第二通信节点发送无线资源控制RRC消息，所述RRC消息包括所述目标小区的参考时钟信息。
  89. 一种第三通信节点，其特征在于，包括：
    接收模块，用于接收第一通信节点发送的第一请求消息，其中，所述第一请求消息用于请求所述第三通信节点反馈参考时钟信息，所述参考时钟信息用于所述第一通信节点确定满足预设条件的目标小区， 并发起第二通信节点由源小区切换至目标小区的切换流程，其中，所述第一通信节点属于所述源小区，所述第二通信节点与所述第一通信节点连接；
    发送模块，用于向所述第一通信节点发送所述反馈参考时钟信息。
  90. 根据权利要求89所述的第三通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    时间敏感性网络TSN时钟的参考时钟信息，时间敏感性传输TSC时钟的参考时钟信息，时间精度满足预设精度阈值的高精度时钟的参考时钟信息。
  91. 根据权利要求89所述的第三通信节点，其特征在于，所述参考时钟信息包括以下至少之一：
    参考系统帧号SFN、TSC的时钟域、TSN的时钟域、时间、时钟精度值、时钟精度类型的指示信息、时间信息类型、不精确度。
  92. 根据权利要求89所述的第三通信节点，其特征在于，所述第一通信节点至少包括：所述源小区对应的源网络设备；
    所述第二通信节点至少包括：终端设备；
    所述第三通信节点包括：操作维护管理OAM、接入和移动性管理实体AMF、中心网络控制CNC网元中的至少一个。
  93. 一种第一通信节点，其特征在于，包括：
    处理器、存储器、与通信接口；
    所述存储器存储计算机执行指令；
    所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如权利要求1-17或34-42任一项所述的小区切换的管理方法。
  94. 一种候选小区对应的网络设备，其特征在于，包括：
    处理器、存储器、与通信接口；
    所述存储器存储计算机执行指令；
    所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如权利要求18-26任一项所述的小区切换的管理方法。
  95. 一种终端设备，其特征在于，包括：
    处理器、存储器、与通信接口；
    所述存储器存储计算机执行指令；
    所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如权利要求27-33任一项所述的小区切换的管理方法。
  96. 一种第三通信节点，其特征在于，包括：
    处理器、存储器、与通信接口；
    所述存储器存储计算机执行指令；
    所述处理器执行所述存储器存储的计算机执行指令，使得所述处理器执行如权利要求43-46任一项所述的小区切换的管理方法。
  97. 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中存储有计算机执行指令，当所述计算机执行指令被处理器执行时用于实现如权利要求1-46中任一项所述的小区切换的管理方法。
  98. 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1-46中任一项所述的小区切换的管理方法。
  99. 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1-46中任一项所述的小区切换的管理方法。
  100. 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1-46中任一项所述的小区切换的管理方法。
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