WO2020238629A1 - 小区切换方法和装置 - Google Patents

小区切换方法和装置 Download PDF

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Publication number
WO2020238629A1
WO2020238629A1 PCT/CN2020/090023 CN2020090023W WO2020238629A1 WO 2020238629 A1 WO2020238629 A1 WO 2020238629A1 CN 2020090023 W CN2020090023 W CN 2020090023W WO 2020238629 A1 WO2020238629 A1 WO 2020238629A1
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WIPO (PCT)
Prior art keywords
information
terminal device
handover
cell
network device
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Application number
PCT/CN2020/090023
Other languages
English (en)
French (fr)
Inventor
汪宇
李榕
孟贤
乔云飞
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2021570867A priority Critical patent/JP7298831B2/ja
Priority to EP20812523.7A priority patent/EP3972340A4/en
Publication of WO2020238629A1 publication Critical patent/WO2020238629A1/zh
Priority to US17/536,265 priority patent/US11917465B2/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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00838—Resource reservation for handover
    • 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
    • H04W36/14—Reselecting a network or an air interface
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • This application relates to communication technology, and in particular to a cell handover method and device.
  • Satellite communication has the advantages of wide coverage, flexible networking, convenient deployment, and freedom from geographic conditions, which has enabled more development in satellite communication.
  • NGEO non-geostationary earth
  • UE user equipment
  • the 5th generation (5G) mobile network since the 5th generation (5G) mobile network is in the early stage of development, there is only a cell handover scheme between the UE and the ground next-generation base station in the 5G technology. Specifically, the UE detects that the UE is currently When the signal quality of the cell is poor, the UE reports the signal quality measurement report to the ground next-generation base station. The ground next-generation base station determines the target cell for the UE based on the received measurement report, and the UE performs the current cell and target cell handover .
  • 5G 5th generation
  • the cell handover scheme of the prior art usually requires a longer response time (greater than the propagation delay of NGEO satellites).
  • the cell handover scheme is applied to the satellite scene, and the response time will cause the handover to fail, that is, the cell handover scheme in the prior art cannot be directly applied to the satellite scene.
  • the present application provides a cell handover method and device, which are used to solve the technical problems of network signaling procedures and high overhead, and further provide a network handover solution suitable for satellite scenarios.
  • the first aspect of the present application provides a cell handover method, including:
  • the first network device of the first cell acquires user information of the terminal device, where the first cell is a current serving cell of the terminal device. Determining, by the first network device, handover information of the terminal device according to the user information and the operation information of the first network device, the handover information is used to instruct the terminal device to perform N consecutive cell handovers, N is a positive integer.
  • the first network device sends a radio resource control (radio resource control, RRC) message to the terminal device, where the RRC message includes the handover information.
  • RRC radio resource control
  • the first network device of the first cell obtains the user information of the terminal device, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device sends the terminal device After the RRC message containing the handover information, the terminal device can perform N consecutive cell handovers according to the handover information.
  • the first network device only needs to obtain user information once, and can configure the subsequent N times in advance.
  • the handover condition of the handover can reduce the signaling process and overhead of the network, thereby reducing the response time of the handover, so that the embodiment of the present application is suitable for network handover in a satellite scenario.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition. It can be understood that the second cell is a relative concept. When the terminal device switches to the second cell, the second cell becomes the current serving cell, and the next cell to be handed over of the original second cell becomes the current second cell , The switching process is analogous to this.
  • acquiring the user information of the terminal device by the first network device of the first cell includes: the first network device sends a measurement configuration message to the terminal device.
  • the first network device receives a measurement report returned by the terminal device in response to the measurement configuration message, the measurement report including user information of the terminal device.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the geographic location information, service type information, terminal capability information, and motion status information of the terminal equipment can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the method further includes: the first network device according to the N switching The switching time information in the item determines the earliest switching time period.
  • the first network device sends a resource reservation request to a second network device of a target cell, where the target cell is the second cell included in the handover item corresponding to the earliest handover time period, and the resource reservation request is used to request
  • the second network device of the target cell reserves resources for the terminal device in the earliest handover time period.
  • the first network device receives the reservation response message of the second network device of the target cell.
  • the second network device reserves resources for the terminal device within a specified time, it is possible to avoid the switching failure caused by resource occupation when the terminal device switches to the second network device, thereby ensuring the robustness of the switching.
  • the second network device reserves resources for the terminal device within a specified time
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each of the switching items is: the measurement start time and the first time offset. Or, the measurement end time, the second time offset or, the measurement start time and the measurement end time.
  • the method further includes: the first network device storing the switching information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • the second aspect of the present application provides a cell handover method, including:
  • the terminal device sends the user information of the terminal device to the first network device in the first cell, where the first cell is the current serving cell of the terminal device.
  • the terminal device receives a radio resource control RRC message sent by the first network device, where the RRC message includes handover information, and the handover information is determined according to the user information and the operation information of the first network device Yes, the handover information is used to instruct the terminal device to perform N consecutive cell handovers, where N is a positive integer, and the following N is also a positive integer.
  • the terminal device sends the user information of the terminal device to the first network device in the first cell, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device After sending the RRC message containing the handover information to the terminal equipment, the terminal equipment can receive the handover information, and can perform N consecutive cell handovers according to the handover information.
  • the terminal equipment In the N times of cell handover, the terminal equipment only needs to switch to the first cell
  • the first network device When the first network device sends user information once, it can configure the switching conditions for the subsequent N handovers in advance at one time, thereby reducing the signaling process and overhead of the network, thereby reducing the response time of the handover, making the embodiments of the present application suitable for Network switching in the satellite scene.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition.
  • the terminal device performs N consecutive cell switching according to the switching information, including: the terminal device performs switching according to the sequence of the switching time information included in the N switching items.
  • the terminal device performing handover according to each handover item includes: measuring the signal quality of the second cell included in the handover item within the handover time information included in the handover item, and the target in the second cell included in the handover item When the signal quality of the cell meets the handover condition of the target cell, a handover instruction is sent to the target cell.
  • the terminal device executes a connection with the handover item. Switch operation of the next switch item adjacent to the switch time information.
  • the terminal device performs handover according to each handover item, and further includes: when there is no second cell whose signal quality meets the handover condition within the handover time included in the handover item, the terminal device Terminate the N cell handover procedures.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the geographic location information, service type information, terminal capability information, and motion status information of the terminal equipment can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the terminal device sending the user information of the terminal device to the first network device of the first cell includes: the terminal device receiving the measurement sent by the first network device of the first cell Configuration message.
  • the terminal device returns measurement report information to the first network device in response to the measurement configuration message; the measurement report information includes user information of the terminal device.
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each switching item is: the measurement start time and the first time offset; or, the measurement end time, the second time offset; or, the measurement starts Start time and end time of measurement.
  • the method further includes: the terminal device stores the handover information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • the third aspect of the present application provides a first network device, including:
  • the obtaining module is configured to obtain user information of the terminal device, where the first cell is the current serving cell of the terminal device.
  • the determining module is configured to determine handover information of the terminal device according to the user information and the operation information of the first network device, where the handover information is used to instruct the terminal device to perform N consecutive cell handovers, N Is a positive integer.
  • the sending module is configured to send a radio resource control (radio resource control, RRC) message to the terminal device, where the RRC message includes the handover information.
  • RRC radio resource control
  • the first network device of the first cell obtains user information of the terminal device, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device sends the terminal device After the RRC message containing the handover information, the terminal device can perform N consecutive cell handovers according to the handover information.
  • the first network device only needs to obtain user information once, and can configure the subsequent N times in advance.
  • the handover condition of the handover can reduce the signaling process and overhead of the network, thereby reducing the response time of the handover, so that the embodiment of the present application is suitable for network handover in a satellite scenario.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition.
  • the acquisition module is further configured to: send a measurement configuration message to the terminal device, and receive a measurement report returned by the terminal device in response to the measurement configuration message, the measurement report including the User information of the terminal device.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the terminal equipment considering that the terminal equipment’s geographic location information, service type information, terminal capability information, and movement status information can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the device further includes: a resource reservation module, configured to determine the earliest handover time period according to the handover time information in the N handover items, and send a resource reservation to the second network device of the target cell Request, the target cell is the second cell included in the handover item corresponding to the earliest handover time period, and the resource reservation request is used to request the second network device of the target cell to be available during the earliest handover time period
  • the terminal device reserves resources, and receives a reservation response message of the second network device of the target cell.
  • the second network device reserves resources for the terminal device within a specified time, it is possible to avoid the switching failure caused by resource occupation when the terminal device switches to the second network device, thereby ensuring the robustness of the switching.
  • the second network device reserves resources for the terminal device within a specified time
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each of the switching items is: the measurement start time and the first time offset. Or, the measurement end time, the second time offset or, the measurement start time and the measurement end time.
  • the device further includes: a storage module for storing the switching information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • the fourth aspect of the present application provides a terminal device, including:
  • the sending module is configured to send user information of the terminal device to a first network device in a first cell, where the first cell is a current serving cell of the terminal device.
  • the receiving module is configured to receive a radio resource control RRC message sent by the first network device, where the RRC message includes handover information, and the handover information is based on the user information and the operation information of the first network device It is determined that the handover information is used to instruct the terminal device to perform N consecutive cell handovers, and N is a positive integer.
  • the terminal device sends the user information of the terminal device to the first network device in the first cell, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device After sending the RRC message containing the handover information to the terminal equipment, the terminal equipment can receive the handover information, and can perform N consecutive cell handovers according to the handover information.
  • the terminal equipment In the N times of cell handover, the terminal equipment only needs to switch to the first cell
  • the first network device When the first network device sends user information once, it can configure the switching conditions for the subsequent N handovers in advance at one time, thereby reducing the signaling process and overhead of the network, thereby reducing the response time of the handover, making the embodiments of the present application suitable for Network switching in the satellite scene.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition.
  • the terminal device performs N consecutive cell switching according to the switching information, including: the terminal device performs switching according to the sequence of the switching time information included in the N switching items.
  • the terminal device performing handover according to each handover item includes: measuring the signal quality of the second cell included in the handover item within the handover time information included in the handover item, and the target in the second cell included in the handover item When the signal quality of the cell meets the handover condition of the target cell, a handover instruction is sent to the target cell.
  • the terminal device executes a connection with the handover item. Switch operation of the next switch item adjacent to the switch time information.
  • the terminal device performs handover according to each handover item, and further includes: when there is no second cell whose signal quality meets the handover condition within the handover time included in the handover item, the terminal device Terminate the N cell handover procedures.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the terminal equipment considering that the terminal equipment’s geographic location information, service type information, terminal capability information, and movement status information can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the sending module is further configured to: the terminal device receives the measurement configuration message sent by the first network device of the first cell.
  • the terminal device returns measurement report information to the first network device in response to the measurement configuration message; the measurement report information includes user information of the terminal device.
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each switching item is: the measurement start time and the first time offset; or, the measurement end time, the second time offset; or, the measurement starts Start time and end time of measurement.
  • the device further includes: a storage module for storing the switching information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • a fifth aspect of the present application provides a cell handover method, including: a terminal device sends user information of the terminal device to a first network device in a first cell, where the first cell is the current serving cell of the terminal device .
  • the first network device in the first cell obtains user information of the terminal device. Determining, by the first network device, handover information of the terminal device according to the user information and the operation information of the first network device, the handover information is used to instruct the terminal device to perform N consecutive cell handovers, N is a positive integer.
  • the first network device sends a radio resource control RRC message to the terminal device, where the RRC message includes the handover information.
  • the terminal device receives the radio resource control RRC message sent by the first network device.
  • a sixth aspect of the present application provides a satellite communication system, the satellite communication system includes a first network device and a terminal device, wherein: the first network device is the first network described in the first aspect and any implementation manner thereof The terminal device is the terminal device described in the second aspect and any implementation manner thereof.
  • the seventh aspect of the present application provides a computer storage medium, including computer program instructions, which when run on a computer, cause the computer to execute the method provided by any of the foregoing implementations.
  • the eighth aspect of the present application provides a computer program product, the computer program product contains computer-readable instructions, and when the computer-readable instructions are executed by a processor, the method provided by any of the foregoing implementations is implemented.
  • a ninth aspect of the present application provides a wireless communication device, including a processor, a memory, and a transceiver.
  • the memory is used to store computer programs
  • the transceiver is used to communicate with other devices
  • the processor is used to execute A stored computer program to make the wireless communication device execute the method according to any one of the first aspect of the present application.
  • a tenth aspect of the present application provides a wireless communication device, including a processor, a memory, and a transceiver.
  • the memory is used to store a computer program
  • the transceiver is used to communicate with other devices
  • the processor is used to execute A computer program stored to make the wireless communication device execute the method according to any one of the second aspects of the present application.
  • the eleventh aspect of the present application provides a system-on-chip or a system-on-chip, which can be applied to a network device, and the system-on-a-chip or system-on-chip includes: at least one communication interface, at least one processor, At least one memory, the communication interface, the memory, and the processor are interconnected by a bus, and the processor executes the instructions stored in the memory so that the network device can execute the method described in the first aspect of the present application.
  • a twelfth aspect of the present application provides a system on a chip or a system chip, which can be applied to a terminal device, and the system on a chip or a system chip includes: at least one communication interface, at least one processor, At least one memory, the communication interface, the memory, and the processor are interconnected by a bus, and the processor executes the instructions stored in the memory to enable the terminal device to execute the method described in the second aspect of the present application.
  • the embodiments of the present application provide a cell handover method and device.
  • the cell currently serving terminal equipment is the first cell, and the first network equipment of the first cell obtains user information of the terminal equipment, and the first network equipment can then use the user information Determine the handover information with the operating information of the first network device, so that after the first network device sends an RRC message containing the handover information to the terminal device, the terminal device can perform N consecutive cell handovers based on the handover information.
  • the first network device only needs to obtain user information once, and can configure the switching conditions for the subsequent N handovers in advance at one time, which can reduce the signaling process and overhead of the network, thereby reducing the response time of the handover, so that the implementation of this application This example is suitable for network switching in satellite scenarios.
  • Figure 1 is a schematic diagram of an existing 5G network architecture
  • Figure 2 is a schematic diagram of an application scenario of a cell handover method according to an embodiment of the application
  • FIG. 3 is a schematic flowchart of a cell handover method according to an embodiment of the application.
  • FIG. 4 is a schematic diagram of intra-satellite cell handover of a terminal device according to an embodiment of the application
  • FIG. 5 is a schematic diagram of inter-satellite cell handover of terminal equipment according to an embodiment of the application.
  • FIG. 6 is a schematic flowchart of another cell handover method according to an embodiment of this application.
  • FIG. 7 is a schematic diagram of a signaling interaction flow of a cell handover method according to an embodiment of the application.
  • FIG. 8 is a schematic diagram of a functional structure of a first network device according to an embodiment of this application.
  • FIG. 9 is a schematic diagram of a functional structure of a terminal device according to an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of another first network device according to an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of another terminal device according to an embodiment of the application.
  • This application provides a cell handover method.
  • the method of this application can be applied to a 5G system or a long term evolution (LTE).
  • the 5G system is also called a new wireless communication system and a new access technology (new radio). , NR) or next-generation mobile communication system.
  • FIG. 1 is a schematic diagram of a typical network architecture of a satellite communication system.
  • a satellite communication system 200 includes a terminal device 201, a satellite base station 202, a ground station 203, and a core network 204.
  • the core network 204 mainly includes a user plane function (UPF) unit 205, a mobility management function (access and mobility management function, AMF) unit 206, a session management function (session management function, SMF) unit 207, and a data network ( data network, DN) 208.
  • the terminal device 201 communicates with the satellite base station 202 through the air interface access network, and the satellite base station 202 is connected to the ground core network 204 through a wireless link (such as a next generation network (NG) interface).
  • NG next generation network
  • the terminal equipment 201 in the embodiments of the present application may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, Wireless communication equipment, user agent or user device.
  • the terminal device 201 can access a satellite network through an air interface and initiate calls, surf the Internet and other services, and can be a mobile device supporting a 5G new radio (NR).
  • NR 5G new radio
  • the terminal device 201 can be a mobile phone, a tablet computer, a portable notebook computer, a virtual ⁇ hybrid ⁇ augmented reality device, a navigation device, a ground base station (for example, a new air interface base station (NR nodeB, gNB)) and a ground station (ground station).
  • NR nodeB new air interface base station
  • ground station ground station
  • GS session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • handheld devices with satellite communication functions computing devices Or other processing equipment connected to the wireless modem, in-vehicle equipment, wearable equipment, terminal equipment in the 5G network, future evolution of the public land mobile network (PLMN) or terminal equipment in other future communication systems Wait.
  • PLMN public land mobile network
  • the satellite base station 202 mainly provides wireless access services for the terminal device 201, dispatches wireless resources to the connected terminal devices, and provides reliable wireless transmission protocols and data encryption protocols.
  • Satellite base stations refer to base stations that use artificial earth satellites and high-altitude aircraft as wireless communication base stations, such as evolved base stations and 5G base stations.
  • the satellite base station can be a medium earth (MEO) satellite and a low earth (LEO) satellite that can be a non-stationary orbit, or a high altitude communication platform (HAPS), etc.
  • MEO medium earth
  • LEO low earth
  • HAPS high altitude communication platform
  • the ground station 203 is mainly responsible for forwarding signaling and service data between the satellite base station 202 and the core network 204.
  • Ground station generally refers to ground equipment installed on the surface of the earth (including on ships or airplanes) for satellite communications. It is mainly composed of a high-gain antenna system that can track artificial satellites, a microwave high-power transmitting system, a low-noise receiving system, and a power supply system.
  • the core network (core network) 204 is mainly used for user access control, charging, mobility management, session management, user security authentication, supplementary services, etc.
  • the core network 204 mainly includes a user plane function unit 205, an access and mobility management function unit 206, a session management function unit 207, and a data network 208.
  • the AMF network element is mainly responsible for services such as mobility management and access management.
  • SMF network elements are mainly responsible for session management, dynamic host configuration protocol functions, selection and control of user plane functions, etc.
  • the UPF network element is mainly responsible for externally connected to the data network and user plane data packet routing and forwarding, message filtering, and performing quality of service (QoS) control related functions.
  • QoS quality of service
  • the core network also includes other functional units, but they are not listed one by one.
  • FIG. 2 is a schematic diagram of an application scenario in which the cell handover method according to an embodiment of the application is applied to a 5G mobile satellite communication system.
  • the satellite 10 can provide communication services to the terminal device 20, and the satellite 10 can also be connected to the core network device 30 (the core network device 30 may include the ground station in the above-mentioned typical architecture, or include the satellite base station or core network service data capable of forwarding Signaling function network element).
  • the core network device 30 may include the ground station in the above-mentioned typical architecture, or include the satellite base station or core network service data capable of forwarding Signaling function network element).
  • Each satellite 10 can serve multiple cells 101, and each cell has a corresponding cell identifier, and each cell identifier can be used to uniquely identify the cell.
  • the terminal device 20 can implement handover between different cells.
  • the execution subject of the terminal device side method can be the terminal device or the device in the terminal device (it should be noted that the terminal device is described as an example in the embodiment provided in this application) .
  • the device in the terminal device may be a chip system, a circuit, or a module, etc., which is not limited in this application.
  • the execution subject for executing the method on the first network device side may be the first network device or a device in the first network device.
  • the device in the first network device may be a chip system, a circuit, or a module, etc., which is not limited in this application.
  • the terminal device involved in the embodiments of the present application may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as central processing unit (dentral processing unit, CPU), memory management unit (memory management unit, MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the first network device involved in the embodiment of the present application may be a satellite, a base station, a transmission reception point (TRP), or a core network device.
  • TRP transmission reception point
  • the first cell involved in the embodiment of the present application may be a serving cell that currently provides services for terminal devices, and the first network device provides services for the first cell.
  • the second cell involved in the embodiment of the present application may be the next configurable cell (that is, the next cell to be handed over) to which the terminal device may be handed over, and the second network device provides services for the second cell. It can be understood that the second cell is a relative concept. When the terminal device switches to the second cell, the second cell becomes the current serving cell, and the next cell to be handed over of the original second cell becomes the current second cell , The switching process is analogous to this.
  • the cell handover involved in the embodiments of the present application may be that the mobile terminal switches from the current serving cell to the next cell to be handed over to realize the handover from the serving cell to the configurable cell.
  • the N consecutive cell handovers involved in the embodiment of the present application may be: the terminal device sequentially executes the process from the first handover to the Nth handover within a period of time. It can be understood that, if the terminal device fails to switch successfully in any of the N handovers within this period of time, the continuous handover process ends.
  • Fig. 3 is a flowchart of a cell handover method provided by an embodiment of the application. As shown in Fig. 3, the method provided in this embodiment includes the following steps:
  • Step S101 The first network device of the first cell acquires user information of the terminal device; where the first cell is the current serving cell of the terminal device.
  • the first cell is the current serving cell of the terminal device, and the current serving cell can also be understood as a cell that the terminal device has accessed.
  • the first network device may be a device that provides services for the first cell.
  • the first network device may be a satellite.
  • the user information of the terminal device may be information that can reflect the signal quality change trend of the terminal device in the first cell.
  • the user information may be specifically determined according to actual application scenarios, which is not specifically limited in the embodiment of this application. .
  • Step S102 The first network device determines the handover information of the terminal device according to the user information and the operation information of the first network device.
  • the handover information is used to instruct the terminal device to perform N consecutive cell handovers, and N is positive. Integer.
  • the operation information of the first network device is the operation information of the satellite.
  • the operation information of the first network device may be used to feed back the operation trajectory of the satellite, and the specific content of the operation information of the first network device may be determined according to actual application scenarios, which is not specifically limited in the embodiment of the present application.
  • the handover information is used to instruct the terminal device to perform N consecutive cell handovers, and N is a positive integer. It can be understood that the handover information is only used to instruct the terminal device to perform N consecutive cell handovers.
  • the terminal device can determine the specific number of handovers according to the actual application scenario. For example, the terminal device can perform complete switching according to the instructions of the handover information. After receiving the handover information, the terminal device can only perform cell handovers less than N times such as N-1 or N-2 times.
  • the specific value of N can be determined according to actual application scenarios. In addition, it can also be determined based on information sent or received by users in the network, operating information of the satellite network, or a combination of the two. The embodiment of the application does not specifically limit this.
  • Step S103 The first network device sends an RRC message to the terminal device, and the RRC message includes the handover information.
  • the RRC message may be a conditional handover (CHO) message or other messages, which is not specifically limited in the embodiment of this application.
  • CHO conditional handover
  • the terminal device can automatically perform N consecutive cell handovers based on the handover information, so that in the embodiment of the present application, the trajectory of the satellite and the user information of the terminal device can be used
  • the predictable feature configures the measurement events and trigger conditions for the subsequent N handovers in advance at one time, thereby reducing the network signaling process and overhead.
  • N is a positive integer.
  • the first network device may actively initiate an action of acquiring user information of the terminal device.
  • the first network device of the first cell acquiring user information of the terminal device includes: the first network device sends a measurement configuration message to the terminal device; the first network device receives the terminal device in response to the measurement configuration message The returned measurement report, which includes the user information of the terminal device.
  • the measurement configuration message sent by the first network device to the terminal device may be used to instruct the terminal device to measure user information.
  • the measurement configuration message may carry configuration items required for configuration switching information. The items can be determined according to actual application scenarios, which are not specifically limited in the embodiments of this application.
  • the terminal device can measure the user information of the terminal device, and return a measurement report including the user information of the terminal device to the first network device, then the first network device can obtain the user information of the terminal device Information, the user information can be determined according to actual application scenarios, which is not specifically limited in the embodiment of the present application.
  • the terminal device may also actively report user information to the first network device.
  • the terminal device may actively send the user information of the terminal device to the first network device periodically, or the terminal device may detect that the environment change exceeds the threshold. After that, it is triggered to send the user information of the terminal device to the first network device, so that the first network device can obtain the user information of the terminal device.
  • the embodiment of the present application does not specifically limit the acquisition of the user information of the terminal device by the first network device of the first cell.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and Sports status information.
  • the geographic location information of the terminal device may be used to feed back the distance of the terminal device from the cell center of the first cell. It can be understood that the closer the terminal device is to the cell center of the first cell, the better the signal quality of the terminal device is usually, and if it adapts, the terminal device may not switch to other cells temporarily. The farther the terminal device is from the cell center of the first cell, the poorer the signal quality of the terminal device is usually. If it adapts, the terminal device may need to switch to another cell.
  • the reference signal received power (RSRP) or reference signal received quality (RSRQ) of the terminal equipment at the cell center and cell edge ) Is quite different. Therefore, the usual handover of terminal equipment between cells is mainly based on the RSRP or RSRQ of the terminal equipment in the cell.
  • the RSRP or RSRQ of the terminal equipment at the cell center and the cell edge is not much different. It is impossible to judge the position of the terminal equipment relative to the cell center through RSRP or RSRQ.
  • the user information of the terminal device includes the geographic location information of the terminal device.
  • the location of the terminal device relative to the cell center can be determined through the geographic location information of the terminal device, so that the subsequent application of this application is based on the terminal device’s location information.
  • the user information determines the switching information, more accurate switching information can be obtained.
  • the service type information of the terminal device can be used to feed back the possible duration of the current service of the terminal device.
  • the possible duration of the service can be based on the historical behavior data of multiple users. For example, if the service is video playback, the video playback usually lasts for a long time, and the statistics duration of the video playback service is longer. It can be understood that the shorter the current service duration of the terminal device may be, the more likely the terminal device can complete the current service without cell handover. The longer the current service duration of the terminal device may be, the more likely it is that the terminal device needs to be in multiple locations. There are multiple handovers in the cell.
  • the user information of the terminal device includes the service type information of the terminal device.
  • the service type information of the terminal device can determine whether the terminal device needs to perform multiple handovers in multiple cells. When determining the switching information according to the user information of the terminal device, more accurate switching information can be obtained.
  • the terminal capability information of the terminal device can be used to feed back the quality of the terminal device’s processing services and communication with the cell.
  • the terminal capability information can include the terminal device’s network environment and hardware capabilities (such as the resolution of the terminal device’s screen, central processing Central Processing Unit (CPU) processing speed, camera resolution, etc.), media processing capabilities (that is, audio and video codec capabilities), and business support capabilities (such as scheduling, conferences, instant messaging, etc.). It can be understood that the stronger the terminal capability information of the terminal device is, the better the signal quality between the terminal device and the first cell is generally, and if it adapts, the terminal device may not switch to another cell temporarily.
  • hardware capabilities such as the resolution of the terminal device’s screen, central processing Central Processing Unit (CPU) processing speed, camera resolution, etc.
  • media processing capabilities that is, audio and video codec capabilities
  • business support capabilities such as scheduling, conferences, instant messaging, etc.
  • the user information of the terminal device includes the terminal capability information of the terminal device.
  • the terminal capability information of the terminal device can be used to determine whether the terminal device needs to perform multiple handovers in multiple cells. When determining the switching information based on the user information of the terminal device, more accurate switching information can be obtained.
  • the motion state information of the terminal device can be used to feed back that the terminal device is in a low-speed, normal-speed, or high-speed motion state.
  • the specific speed value of the low-speed, normal-speed, or high-speed can be set according to actual application scenarios. There is no specific limitation. It can be understood that the faster the terminal device moves, the more likely the terminal device needs to be handed over in multiple cells. The slower the movement speed of the terminal device, the more likely the terminal device does not need to perform cell switching or perform cell switching fewer times.
  • the user information of the terminal device includes the motion state information of the terminal device.
  • the motion state information of the terminal device can be used to determine whether the terminal device needs to perform multiple handovers in multiple cells, so that the subsequent When determining the switching information based on the user information of the terminal device, more accurate switching information can be obtained.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the operating track of the first network device can be predicted based on the location information of the first network device and the neighboring cell information of the first cell, so that the embodiment of this application can be based on the movement information of the first network device and the terminal device
  • the user information determines the accurate switching information of the terminal device.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, where the second cell is the next cell to be handed over,
  • the configuration information of each second cell includes: cell identity, cell frequency value, and handover conditions.
  • each handover item may correspond to a cell handover of the terminal device.
  • the handover time information in the handover item can be used to indicate the handover time of the terminal device.
  • the second cell in the handover item is a configurable cell configured for the terminal device according to the actual application scenario. It can be understood that the second cell (second network device ) Is a relative concept. When the terminal device switches to the second cell, the second cell becomes the current serving cell (the first cell), and the next cell to be handed over to the original second cell becomes the current second cell , The switching process can be deduced by analogy. For specific embodiments, please refer to steps S311 to S316 in FIG. 7. The number of the second cell may be one or multiple.
  • the number of the second cell is one, the calculation of the first network device can be reduced and the calculation efficiency can be improved.
  • the number of second cells is multiple, if the terminal device cannot switch to one of the second cells, it can also choose to switch to other second cells, and the stability of the handover is high. It is also possible to determine at least two handoverable target cells in combination with predicting the possible movement direction of the user equipment, and at least one of them is used as a backup target cell.
  • the configuration information of the second cell includes: cell identity, cell frequency value and handover conditions.
  • the cell identity may specifically be: the global identity of the second cell, etc., and a cell can be uniquely determined through the cell identity.
  • the cell frequency value may be the communication frequency of the second cell.
  • the handover condition may specifically be: the signal quality between the terminal equipment and the second cell is greater than the preset first threshold, the terminal equipment is switched to the second cell, or the difference between the signal quality of the terminal equipment and the second cell If it is greater than the preset second threshold value, the terminal device switches to the second cell.
  • the preset first threshold value and the preset second threshold value may be determined according to actual application scenarios, which are not specifically limited in the embodiment of the application . It can be understood that the handover conditions can also be determined according to actual application scenarios, so that after the terminal device switches to the second cell, the signal quality of the terminal device is better than the signal quality of the terminal device before the handover. The embodiment of this application does not make the handover conditions. Specific restrictions.
  • the handover time information can include the measurement start time and the test end time.
  • the terminal device can measure the signal quality with at least one second cell at the measurement start time.
  • the signal quality can specifically be RSRP, RSRQ Or received signal strength indication (RSSI), etc., if the signal quality between the terminal device and the at least one second cell meets any of the at least one second cell between the measurement start time and the measurement end time
  • the terminal device can send a handover request to any second cell that meets the handover condition to request to switch to any second cell that meets the handover condition.
  • tN_on, tN_off is the measurement start time and test end time corresponding to the Nth handover
  • Cell_ID_N is the cell identifier corresponding to the Nth handover
  • Freq_N is the frequency value of the cell corresponding to the Nth handover
  • Signal_thresh_N is the Nth handover.
  • the N is any positive integer from 1 to 8.
  • the maximum value of N can be set to 8, that is, in the protocol, the value space of N is N ⁇ ⁇ 1,2,3,4,5,6,7,8 ⁇ to obtain accurate switching information. It can be understood that the value space of N can also be a subset of the above value space (including some elements in the full set), such as ⁇ 1,2,4,5,6 ⁇ , ⁇ 4,5,6,7,8 ⁇ , ⁇ 4,6,8 ⁇ .
  • the above value space can be determined in combination with the time during which the satellite can serve the terminal device, which is not specifically limited in the embodiment of the present application.
  • the terminal device capability information includes cache capability and/or computing capability. The stronger the cache capability and/or computing capability of the terminal device, the larger the value of N.
  • N a calculation method of N can be expressed as:
  • d and d max are the actual distance and maximum distance of the terminal equipment from the center of the cell, respectively
  • s and s max are the actual and maximum motion state values of the terminal equipment
  • ⁇ and ⁇ max are the service continuity of the terminal equipment respectively.
  • Time and maximum duration, c and c max are respectively the terminal capability and maximum terminal capability value corresponding to the terminal device.
  • the motion state information s of the terminal device is divided into three states: high, medium, and low.
  • the geographic location information d of the terminal device is divided into two states: far and near.
  • the service type information ⁇ of the terminal device is divided into two states: long and short.
  • the terminal device capability information c is divided into two states: strong and weak. Then, in the consideration of the combined scenario of d and s, the value of N can be as shown in Table 2.
  • the value of N will have adaptive changes.
  • the specific value of N can be based on the actual application scenario and the geographic location information of the terminal device.
  • the service type information of the terminal device, and/or the terminal capability information of the terminal device, and/or the motion state information of the terminal device are selected so that for (d, s, ⁇ , c), in s , ⁇ and c are the same, the geographical position d of the terminal device is closer to the center of the first cell, the greater the value of N; or, when s, d, and c are the same, the terminal device
  • the service type information ⁇ is the statistical duration of the service.
  • the state information s includes the moving speed of the terminal device.
  • the embodiment of the application does not specifically limit this.
  • different accurate N values can be determined according to information such as the location information, the motion state, the terminal capability, and the service type of the terminal device.
  • step S102 it may further include: the first network device determines the earliest handover time period according to the handover time information in the N handover items; the first network device sends a resource reservation to the second network device of the target cell Request, the target cell is the second cell included in the handover item corresponding to the earliest handover time period, and the resource reservation request is used to request the second network device of the target cell to reserve resources for the terminal device during the earliest handover time period ; The first network device receives the reservation response message of the second network device of the target cell.
  • the first network device may Determine the handover item with the earliest handover time period among the N handover items, and send a resource reservation request to the second cell corresponding to the handover item to request at least one second cell (that is, the target cell) corresponding to the handover item.
  • the earliest handover time period reserves resources for the terminal device.
  • the second network device of the target cell can send a reservation response message to the first network device in response to the resource reservation request, and the first network device receives the target cell’s
  • the reservation response message of the second network device may indicate that the second network device will reserve resources for the terminal device in the earliest handover time period.
  • the second network device of the second cell of the handover item does not receive the handover request from the terminal device within the handover time period corresponding to the handover time information of the handover item, or the second network device of the second cell of the handover item
  • the second network device receives the handover request from the terminal device, but the handover is not successful, the second network device can automatically release the reserved resources to ensure efficient use of resources in the continuous handover process.
  • step S102 it may further include: the first network device storing the handover information.
  • a terminal device when a terminal device switches in a satellite cell, it may include intra-satellite cell switching and inter-satellite cell switching.
  • Figure 4 shows the application scenario of intra-satellite cell handover. As shown in Figure 4, the terminal device switches between different cells of the same satellite. For example, the satellite moves from right to left, and the terminal needs to perform intra-satellite cell handover. Handover from cell 1 to cell 2 of the satellite.
  • Figure 5 shows the application scenario of inter-satellite cell handover. As shown in Figure 5, the terminal device switches between different cells of different satellites. For example, the satellite moves from right to left, and the terminal needs to perform inter-satellite cell handover. Switch from cell 1 of satellite 1 to cell 2 of satellite 2.
  • the handover information is stored in the satellite, and the satellite can automatically be the terminal in the second cell corresponding to the handover item within the handover time information of each handover item according to the stored handover information
  • the equipment reserves resources; when the terminal device performs inter-satellite cell handover, the handover information is stored in the satellite as the first network device, and the first network device can use the stored handover information at the handover time of each handover item Within the information, a resource reservation request is sent to the second network device of the second cell corresponding to the handover item to request the second network device to reserve resources for the terminal device.
  • the handover command (mobility controlInfo) information element (information element, IE) carried in the RRC message includes the handover information.
  • a field corresponding to the switching information can be added to the switching command cell carried in the RRC message, so that the switching information can be carried in the RRC message and sent to the terminal device.
  • the switching time information included in each switching item is: the measurement start time and the first time offset; or, the measurement end time and the second time offset; or, the measurement start time and the measurement end time.
  • the corresponding code may be:
  • t-Meas-On may be 32 bits, indicating the start time of measurement
  • t-Meas-Off may be 32 bits, indicating the start time of measurement
  • targetSignalValue may indicate the signal quality between the terminal device and at least one second cell.
  • the corresponding code may be:
  • t-Meas-On can be 32 bits, representing the start time or end time of the measurement
  • t-Offset represents the first time offset or the second time offset
  • targetSignalValue can represent the terminal device and at least one second cell The signal quality between.
  • the maximum residence time of the user in the cell is about 30s.
  • the maximum value of t-offset is 3000, which can be characterized by 12 bits. Therefore, the first time offset and the second time offset can be set to 12 bits.
  • the first network device may also be a core network device communicating with satellites. It can be understood that when the first network device is a core network device, the satellite can only be used as a receiving and sending device, and the operation information of the first network device can be the operation information of the satellite communicating with the core network device.
  • Each step of the cell handover in the embodiment is performed by the core network equipment, so that the core network equipment can reduce the computing load of the satellite.
  • the specific method for determining the cell handover is similar to the way the first network equipment is a satellite, and will not be repeated here. .
  • the embodiments of this application provide a cell handover method and device.
  • the cell currently serving terminal equipment is the first cell, and the first network device of the first cell obtains user information of the terminal device, and then the first network The device can determine the handover information according to the user information and the operation information of the first network device, so that after the first network device sends the RRC message containing the handover information to the terminal device, the terminal device can perform N consecutive cell handovers based on the handover information.
  • the first network device only needs to obtain user information once, and can configure the handover conditions for the subsequent N handovers in advance at one time, which can reduce the network signaling process and overhead, thereby reducing the handover response time , Making the embodiments of this application suitable for network handover in satellite scenarios.
  • FIG. 6 is a flowchart of another cell handover method provided by an embodiment of this application. As shown in FIG. 6, the method provided in this embodiment includes the following steps:
  • Step S201 The terminal device sends the user information of the terminal device to the first network device in the first cell; where the first cell is the current serving cell of the terminal device.
  • Step S202 The terminal device receives the radio resource connection RRC message sent by the first network device; where the RRC message includes handover information, and the handover information is determined according to the user information and the operation information of the first network device.
  • the handover information is used to instruct the terminal device to perform N consecutive cell handovers, and N is a positive integer.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the handover information includes N handover items, each of which includes: handover time information and configuration information of at least one second cell, where the second cell is the next cell to be handed over, and each second cell
  • the configuration information of the cell includes: cell identity, cell frequency value and handover conditions.
  • the terminal device performs N consecutive cell switching according to the switching information includes: the terminal device performs switching according to the sequence of switching time information included in the N switching items.
  • the terminal device performing handover according to each handover item includes: measuring the signal quality of the second cell included in the handover item within the handover time information included in the handover item, and the target cell in the second cell included in the handover item If the signal quality meets the handover condition of the target cell, a handover instruction is sent to the target cell, and when the terminal device switches to the target cell, the terminal device executes the switching time information adjacent to the handover item Switch operation of the next switch item.
  • the terminal device may store the handover information, and perform N consecutive cell handovers according to the handover information. Specifically, the terminal device can switch according to the sequence of the switching time information included in the N switch items.
  • n is an integer between 1 and N
  • the terminal device switches according to the nth switch item Including: the terminal device is tested according to its own clock t when tn_on (the test start time of the nth switch item) ⁇ t ⁇ tn_off (the test end time of the nth switch item), and the nth switch item is tested Include the signal quality of the second cell, take the cell whose signal quality meets the handover condition of the second cell as the target cell, send a handover instruction to the target cell, and then perform cell handover procedures such as synchronization, access, and handover response.
  • the terminal device switches to the target cell, the terminal device performs the switching operation of the next switching item adjacent to the switching time information of the switching item, and the switching process is similar to that of the nth switching item. This will not be repeated here.
  • the terminal device can terminate the N cell handovers Process. Further, the terminal device or the first network device may initiate the cell handover reconfiguration process here.
  • the terminal device may delete the nth switching item to avoid resource occupation by the nth switching item.
  • the N is any positive integer from 1 to 8.
  • the terminal device capability information includes cache capability and/or computing capability. The stronger the cache capability and/or computing capability of the terminal device, the larger the value of N.
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each switching item is: the measurement start time and the first time offset; or,
  • the measurement end time, the second time offset; or, the measurement start time and the measurement end time are the measurement end time, the second time offset; or, the measurement start time and the measurement end time.
  • the first network device is a satellite or a core network device that communicates with the satellite.
  • the terminal device may passively send user information of the terminal device to the first network device.
  • the terminal device sending the user information of the terminal device to the first network device in the first cell includes: the terminal device receives the measurement configuration message sent by the first network device in the first cell; the terminal device responds to the The measurement configuration message returns measurement report information to the first network device; the measurement report information includes user information of the terminal device.
  • the terminal device can actively send the user information of the terminal device to the first network device.
  • the terminal device actively sends the user information of the terminal device to the first network device according to actual application scenarios.
  • the embodiment of the application does not specifically limit this.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and motion state information of the terminal device.
  • the cell currently serving the terminal device is the first cell, and the terminal device sends user information of the terminal device to the first network device in the first cell.
  • the first network device can determine the switching information according to the user information and the operation information of the first network device, so that after the first network device sends the RRC message containing the switching information to the terminal device, the terminal device can receive the switching information, and can Perform N consecutive cell handovers according to the handover information.
  • the terminal device In the N times of cell handover, the terminal device only needs to send user information to the first network device of the first cell once, and can configure the handover conditions for the subsequent N handovers in advance. Therefore, the signaling process and overhead of the network can be reduced, and the response time of handover can be reduced, so that the embodiment of the present application is suitable for network handover in a satellite scenario.
  • FIG. 7 is a schematic diagram of a signaling interaction flow of a cell handover method according to an embodiment of the application.
  • the signaling interaction of the cell handover method in the embodiment of the present application may include:
  • Step S301 The first network device of the first cell sends a measurement configuration message to the terminal device.
  • the first network device may send specific measurement configuration items to the terminal device through a measurement configuration (measurement configuration) message.
  • the measurement configuration message only needs to be issued once when the terminal device and the first network device initially establish an RRC connection, until the terminal device completes N consecutive handovers. Enter the process of reconfiguring the switching information, and send a new measurement configuration message.
  • the terminal device fails to switch successfully in any of the N consecutive switchs, it also needs to send a new measurement configuration message again to enter the process of reconfiguring the switch information.
  • Step S302 The terminal device sends measurement report information to the first network device, where the measurement report information includes user information of the terminal device.
  • the terminal device after receiving the measurement configuration message, can measure the user information of the terminal device, and feed back the measurement report information including the user information of the terminal device to the first network device through a measurement report (Measurement report) message.
  • a measurement report Measurement report
  • the measurement report message corresponds to the measurement configuration message, and usually only needs to be sent once until the terminal device completes N consecutive handovers, and then enters the process of reconfiguring the handover information, and responds to the new measurement. Configure the message and send a new measurement report message.
  • Step S303 The first network device determines handover information according to the user information and the operation information of the first network device.
  • the first network device may store the switching information, so as to perform subsequent operations using the stored switching information.
  • Step S304 The first network device sends a resource reservation request to the second network device corresponding to the second cell in the first handover item.
  • the first network device may send a resource reservation request to the second network device corresponding to the second cell in the first handover item through the Early HO Request message, requesting the second network device to Resources are reserved in the switching time information in the first switching item.
  • this process may also correspond to multiple second cells, that is, multiple second cells are requested to reserve resources in a specified time period to ensure the robustness of handover. Because the communication process between the second network device and the terminal device in each second cell is similar, only one second cell is used as an example for description in the embodiment of the present application.
  • Step S305 The second network device sends a reservation response message to the first network device.
  • the second network device may reserve resources for the terminal device within the time period corresponding to the switching time information of the first switching item, and respond with the reserved switching confirmation character (Early HO Acknowledgement) as the reserved response message.
  • Step S306 The first network device sends a radio resource connection RRC message to the terminal device, where the RRC message includes handover information.
  • the first network device may send the switching information to the terminal device through an RRC message, and the specific RRC message may be a CHO command message.
  • Step S307 The terminal device measures the signal quality of the second cell included in the handover item within the handover time information included in the first handover item.
  • the terminal device can measure the signal quality of the terminal device and the second cell included in the first switching item in the switching time information included in the first switching item in the switching information.
  • Step S308 The terminal device sends a synchronization and random access message to the second network device of the target cell when the signal quality of the target cell in the second cell included in the first handover item meets the handover condition of the target cell.
  • Step S309 The terminal device sends a handover confirmation message to the second network device.
  • the terminal device can initiate a handover to the second network device when the signal quality of the target cell in the second cell included in the first handover item meets the handover condition of the target cell.
  • it can first Send a synchronization and random access (synchronization and randorm access) message to the second network device, and then send a handover confirmation (HO confirm) message to the second network device to perform handover of the terminal device from the first network device to the second network device.
  • a synchronization and random access synchronization and randorm access
  • HO confirm handover confirmation
  • the terminal device can delete the first switching item to reduce resource occupation.
  • Step S310 The second network device sends a handover complete message to the first network device.
  • the second network device may send a HO complete message to the first network device, indicating that the terminal device has successfully switched from the first network device to the second network device.
  • Step S311 The N-1th network device sends a resource reservation request to the Nth network device.
  • N-1 is a positive integer greater than or equal to 2.
  • Step S312 The Nth network device sends a reservation response message to the N-1th network device.
  • the second network device can take over the function of the first network device, send a resource reservation request to the third network device, and receive a reservation response from the third network device news.
  • the N-1th network device can take over the function of the N-2th network device, send a resource reservation request to the Nth network device, and receive the Nth network device The reserved response message of the device.
  • the second cell can be a relative concept. After the terminal device is switched to the second cell, the second cell becomes the current serving cell (first cell), and the second cell is the second cell. A cell to be handed over (the third cell) becomes the current second cell, and the handover process can be deduced by analogy. Similarly, the configuration information of at least one second cell in any handover item included in the handover information is also the same relative concept.
  • Step S313 The terminal device measures the signal quality of the second cell included in the handover item within the handover time information included in the N1th handover item.
  • Step S314 When the signal quality of the target cell in the second cell included in the Nth handover item meets the handover condition of the target cell, the terminal device sends the synchronization and random access message value to the Nth network device of the target cell.
  • Step S315 The terminal device sends a handover confirmation message to the Nth network device.
  • Step S316 The Nth network device sends a handover complete message to the N-1th network device.
  • the terminal device can initiate a handover to the Nth network device when the signal quality of the target cell in the second cell included in the Nth handover item meets the handover condition of the target cell.
  • it can first Send synchronization and random access (synchronization and randorm access) messages to the Nth network device, and then send a handover confirmation (HO confirm) message to the Nth network device to perform the handover of the terminal device from the N-1th network device to the Nth network device . So as to realize N consecutive cell handovers of the terminal equipment.
  • FIG. 8 is a schematic diagram of the functional structure of a first network device according to an embodiment of the application. As shown in FIG. 8, the first network device includes:
  • the obtaining module 41 is configured to obtain user information of a terminal device, where the first cell is a current serving cell of the terminal device.
  • the determining module 42 is configured to determine handover information of the terminal device according to the user information and the operation information of the first network device, where the handover information is used to instruct the terminal device to perform N consecutive cell handovers, N is a positive integer.
  • the sending module 43 is configured to send a radio resource control (radio resource control, RRC) message to the terminal device, where the RRC message includes the handover information.
  • RRC radio resource control
  • the first network device of the first cell obtains user information of the terminal device, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device sends the terminal device After the RRC message containing the handover information, the terminal device can perform N consecutive cell handovers according to the handover information.
  • the first network device only needs to obtain user information once, and can configure the subsequent N times in advance.
  • the handover condition of the handover can reduce the signaling process and overhead of the network, thereby reducing the response time of the handover, so that the embodiment of the present application is suitable for network handover in a satellite scenario.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition.
  • the acquisition module 41 is further configured to: send a measurement configuration message to the terminal device, and receive a measurement report returned by the terminal device in response to the measurement configuration message, the measurement report including all The user information of the terminal device.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the terminal equipment considering that the terminal equipment’s geographic location information, service type information, terminal capability information, and movement status information can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the device further includes: a resource reservation module, configured to determine the earliest handover time period according to the handover time information in the N handover items, and send a resource reservation to the second network device of the target cell Request, the target cell is the second cell included in the handover item corresponding to the earliest handover time period, and the resource reservation request is used to request the second network device of the target cell to be available during the earliest handover time period.
  • the terminal device reserves resources, and receives a reservation response message of the second network device of the target cell.
  • the second network device reserves resources for the terminal device within a specified time, it is possible to avoid the switching failure caused by resource occupation when the terminal device switches to the second network device, thereby ensuring the robustness of the switching.
  • the second network device reserves resources for the terminal device within a specified time
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each switching item is: the measurement start time and the first time offset. Or, the measurement end time, the second time offset or, the measurement start time and the measurement end time.
  • the device further includes: a storage module for storing the switching information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • the first network device in this embodiment can be used to execute the method corresponding to the first network device.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • FIG. 9 shows a schematic diagram of the functional structure of a terminal device provided by an embodiment of the present application.
  • the terminal device includes:
  • the sending module 51 is configured to send user information of the terminal device to a first network device in a first cell, where the first cell is a current serving cell of the terminal device.
  • the receiving module 52 is configured to receive a radio resource control RRC message sent by the first network device, where the RRC message includes handover information, and the handover information is based on the user information and the operation of the first network device If the information is determined, the handover information is used to instruct the terminal device to perform N consecutive cell handovers, and N is a positive integer.
  • the terminal device sends the user information of the terminal device to the first network device in the first cell, and the first network device can determine the handover information according to the user information and the operation information of the first network device, so that the first network device After sending the RRC message containing the handover information to the terminal equipment, the terminal equipment can receive the handover information, and can perform N consecutive cell handovers according to the handover information.
  • the terminal equipment In the N times of cell handover, the terminal equipment only needs to switch to the first cell
  • the first network device When the first network device sends user information once, it can configure the switching conditions for the subsequent N handovers in advance at one time, thereby reducing the signaling process and overhead of the network, thereby reducing the response time of the handover, making the embodiments of the present application suitable for Network switching in the satellite scene.
  • the handover information includes N handover items, and each handover item includes: handover time information and configuration information of at least one second cell, and the second cell is the next to be handed over.
  • Cell the configuration information of each second cell includes: cell identity, cell frequency value and handover condition.
  • the terminal device performs N consecutive cell switching according to the switching information, including: the terminal device performs switching according to the sequence of the switching time information included in the N switching items.
  • the terminal device performing handover according to each handover item includes: measuring the signal quality of the second cell included in the handover item within the handover time information included in the handover item, and the target in the second cell included in the handover item When the signal quality of the cell meets the handover condition of the target cell, a handover instruction is sent to the target cell.
  • the terminal device executes a connection with the handover item. Switch operation of the next switch item adjacent to the switch time information.
  • the terminal device performs handover according to each handover item, and further includes: when there is no second cell whose signal quality meets the handover condition within the handover time included in the handover item, the terminal device Terminate the N cell handover procedures.
  • the user information of the terminal device includes at least one of the following: geographic location information of the terminal device, service type information of the terminal device, terminal capability information of the terminal device, and The motion state information of the terminal device.
  • the terminal equipment considering that the terminal equipment’s geographic location information, service type information, terminal capability information, and movement status information can better feed back the signal quality transformation of the terminal equipment, the geographic location information and service type information of the terminal equipment ,
  • the terminal capability information and the motion state information can enable the subsequent determination of the switching information according to the user information of the terminal device to obtain more accurate switching information.
  • the service type information of the terminal device is the statistical duration of the service, and the longer the statistical duration of the service of the terminal device, the larger the value of N.
  • the motion state information of the terminal device includes the motion speed of the terminal device, and the greater the motion speed of the terminal device, the smaller the value of N.
  • the terminal device capability information includes caching capability and/or computing capability, and the stronger the caching capability and/or computing capability of the terminal device, the larger the value of N.
  • the operation information of the first network device includes at least one of the following: location information of the first network device, and neighboring cell information of the first cell.
  • the N is any positive integer from 1 to 8.
  • the value of N is set to 1 to 8. In between, the accurate next cell to be handed over can be obtained.
  • the sending module is further configured to: the terminal device receives the measurement configuration message sent by the first network device of the first cell.
  • the terminal device returns measurement report information to the first network device in response to the measurement configuration message; the measurement report information includes user information of the terminal device.
  • the handover command information element carried in the RRC message includes the handover information.
  • the switching time information included in each switching item is: the measurement start time and the first time offset; or, the measurement end time, the second time offset; or, the measurement starts Start time and end time of measurement.
  • the device further includes: a storage module for storing the switching information.
  • the first network device is a satellite, or a core network device communicating with the satellite.
  • the terminal device of this embodiment can be used to execute a method corresponding to the terminal device.
  • the specific implementation manner and technical effect are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of another first network device provided by an embodiment of the application.
  • the first network device includes: a processor 61, a memory 62, and a transceiver 63.
  • the memory 62 is used for storing A computer program
  • the transceiver 63 is used to communicate with other devices
  • the processor 61 is used to execute the computer program stored in the memory 62, so that the first network device 61 executes the same as the first network device in the above embodiment method.
  • FIG. 11 is a schematic structural diagram of another terminal device provided by an embodiment of the application.
  • the terminal device includes a processor 71, a memory 72, and a transceiver 73.
  • the memory 72 is used to store a computer program.
  • the transceiver 73 is used to communicate with other devices, and the processor 71 is used to execute the computer program stored in the memory 72, so that the network device 71 executes the method performed by the terminal device in the foregoing embodiment.
  • An embodiment of the present application also provides a satellite communication system.
  • the satellite communication system includes a first network device and a terminal device, wherein: the first network device is the first network device described in any of the foregoing implementation manners, and the The terminal device is the terminal device described in any of the foregoing implementation manners.
  • the embodiments of the present application also provide a computer storage medium, in which computer-readable instructions are stored, and when the computer-readable instructions are executed by a processor, the method provided by any of the foregoing implementation manners is implemented.
  • the embodiments of the present application also provide a computer program product, the computer program product contains computer-readable instructions, and when the computer-readable instructions are executed by a processor, the method provided by any of the foregoing implementations is implemented.
  • the embodiments of the present application also provide a system on a chip or a system chip, which can be applied to a network device, and the system on a chip or a system chip includes: at least one communication interface, at least one processor, and at least A memory, the communication interface, the memory, and the processor are interconnected by a bus, and the processor executes the instructions stored in the memory so that the network device can execute the method on the first network device side.
  • the embodiments of the present application also provide a system on a chip or a system chip, the system on a chip or a system chip may be applied to a terminal device, and the system on a chip or a system chip includes: at least one communication interface, at least one processor, and at least A memory, the communication interface, the memory, and the processor are interconnected by a bus, and the processor executes the instructions stored in the memory to make the terminal device execute the method on the terminal device side.
  • the processor used in the first network device or terminal device in the embodiment of the present application may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC).
  • the processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the bus in this embodiment of the application may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc.
  • the buses in the drawings of this application are not limited to only one bus or one type of bus.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the unit is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the unit described as a separate component may or may not be physically separate, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium.
  • the above-mentioned software functional unit is stored in a storage medium, and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor execute part of the method in each embodiment of the present application step.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.

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Abstract

本申请实施例提供一种小区切换方法和装置，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。

Description

小区切换方法和装置
本申请要求于2019年05月30日提交中国专利局、申请号为201910462911.9、申请名称为“小区切换方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术，尤其涉及一种小区切换方法和装置。
背景技术
卫星通信具有覆盖面广、组网灵活、部署方便和不受地理条件限制等优点，使得卫星通信得到较多发展。在卫星通信的场景中，由于非静止轨道(non-geostationary earth orbit，NGEO)卫星的高速运动，处于连接态的用户终端(user equipment，UE)，需要频繁地在不同的卫星小区间切换，以保障业务的连续性。
现有技术中，由于第五代移动网络(the 5th generation，5G)处于发展初期，在5G技术中只存在实现UE与地面下一代基站的小区切换方案，具体的，在UE检测到UE在当前小区的信号质量较差的情况下，UE向地面下一代基站上报信号质量测量报告，地面下一代基站基于接收到的测量报告，为UE确定切换的目标小区，UE执行当前小区与目标小区的切换。
但是，由于NGEO卫星的传播时延通常为几毫秒到几十毫秒，而现有技术的小区切换方案通常需要较长的响应时间(大于NGEO卫星的传播时延)，若将现有技术的该小区切换方案应用于卫星场景，该响应时间会导致切换失败，即现有技术的该小区切换方案不能直接应用于卫星场景中。
发明内容
本申请提供一种小区切换方法和装置，用于解决网络的信令流程和开销较多的技术问题，进而提供一种适用于卫星场景中的网络切换方案。
本申请第一方面提供一种小区切换方法，包括：
第一小区的第一网络设备获取终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。所述第一网络设备向所述终端设备发送无线资源控制(radio resource control，RRC)消息，所述RRC消息中包括所述切换信息。
该方法中，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够 一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。可以理解，第二小区是一个相对概念，当终端设备切换到第二小区后，该第二小区就成为当前服务小区，而原第二小区的下一个待切换的小区就成为现在的第二小区，切换过程依次类推。
一种示例性的方式中，所述第一小区的第一网络设备获取终端设备的用户信息，包括：所述第一网络设备向所述终端设备发送测量配置消息。所述第一网络设备接收所述终端设备响应于所述测量配置消息返回的测量报告，所述测量报告包括所述终端设备的用户信息。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该方法中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该方法中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可以得到准确的下一个待切换小区。
一种示例性的方式中，所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定切换信息之后，还包括：所述第一网络设备根据所述N个切换项中切换时间信息确定最早切换时间段。所述第一网络设备向目标小区的第二网络设备发送资源预留请求，所述目标小区为所述最早切换时间段对应的切换项包括的第二小区，所述资源预留请求用于请求所述目标小区的第二网络设备在所述最早切换时间段为所述终端设备预留资源。所述第一网络设备接收所述目标小区的第二网络设备的预留应答消息。
该方法中，因为第二网络设备在指定时间内为终端设备预留资源，因此，可以避 免终端设备向第二网络设备切换时，因为资源占用导致的切换失败的现象，从而可以保证切换的鲁棒性。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量。或，测量结束时刻、第二时间偏移量或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定切换信息之后，还包括：所述第一网络设备存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本申请第二方面提供一种小区切换方法，包括：
终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。所述终端设备接收所述第一网络设备发送的无线资源控制RRC消息，其中，所述RRC消息包括切换信息，所述切换信息为根据所述用户信息和所述第一网络设备的运行信息确定的，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数，下述N也是正整数。
该方法中，终端设备向第一小区的第一网络设备发送该终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以接收到该切换信息，并可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，终端设备只需要向第一小区的第一网络设备发送一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
一种示例性的方式中，所述终端设备根据所述切换信息进行连续的N次小区切换，包括：所述终端设备根据所述N个切换项包括的切换时间信息的前后顺序排列进行切换。其中，所述终端设备根据每个切换项进行切换包括：在该切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量，在该切换项包括的第二小区中的目标小区的信号质量满足所述目标小区的切换条件的情况下，向所述目标小区发送切换指令，在所述终端设备切换到所述目标小区的情况下，所述终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作。
一种示例性的方式中，所述终端设备根据每个切换项进行切换，还包括：在该切换项包括的切换时间内没有信号质量满足切换条件的第二小区的情况下，所述终端设备终止所述N次小区切换流程。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该方法中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及 运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该方法中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可以得到准确的下一个待切换小区。
一种示例性的方式中，所述终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，包括：所述终端设备接收所述第一小区的第一网络设备发送的测量配置消息。所述终端设备响应于所述测量配置消息向所述第一网络设备返回测量报告信息；所述测量报告信息包括所述终端设备的用户信息。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量；或，测量结束时刻、第二时间偏移量；或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述终端设备接收所述第一网络设备发送的无线资源控制RRC消息之后，还包括：所述终端设备存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本申请第三方面提供一种第一网络设备，包括：
获取模块，用于获取终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。确定模块，用于根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。发送模块，用于向所述终端设备发送无线资源控制(radio resource control，RRC)消息，所述RRC消息中包括所述切换信息。
该装置中，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切 换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
一种示例性的方式中，所述获取模块还用于：向所述终端设备发送测量配置消息，接收所述终端设备响应于所述测量配置消息返回的测量报告，所述测量报告包括所述终端设备的用户信息。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该装置中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该装置中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可以得到准确的下一个待切换小区。
一种示例性的方式中，所述装置还包括：资源预留模块，用于根据所述N个切换项中切换时间信息确定最早切换时间段，向目标小区的第二网络设备发送资源预留请求，所述目标小区为所述最早切换时间段对应的切换项包括的第二小区，所述资源预留请求用于请求所述目标小区的第二网络设备在所述最早切换时间段为所述终端设备预留资源，接收所述目标小区的第二网络设备的预留应答消息。
该方法中，因为第二网络设备在指定时间内为终端设备预留资源，因此，可以避免终端设备向第二网络设备切换时，因为资源占用导致的切换失败的现象，从而可以保证切换的鲁棒性。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量。或，测量结束时刻、第二时间偏移量或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述装置还包括：存储模块，用于存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本申请第四方面提供一种终端设备，包括：
发送模块，用于向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。接收模块，用于接收所述第一网络设备发送的无线资源控制RRC消息，其中，所述RRC消息包括切换信息，所述切换信息为根据所述用户信息和所述第一网络设备的运行信息确定的，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。
该装置中，终端设备向第一小区的第一网络设备发送该终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以接收到该切换信息，并可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，终端设备只需要向第一小区的第一网络设备发送一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
一种示例性的方式中，所述终端设备根据所述切换信息进行连续的N次小区切换，包括：所述终端设备根据所述N个切换项包括的切换时间信息的前后顺序排列进行切换。其中，所述终端设备根据每个切换项进行切换包括：在该切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量，在该切换项包括的第二小区中的目标小区的信号质量满足所述目标小区的切换条件的情况下，向所述目标小区发送切换指令，在所述终端设备切换到所述目标小区的情况下，所述终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作。
一种示例性的方式中，所述终端设备根据每个切换项进行切换，还包括：在该切换项包括的切换时间内没有信号质量满足切换条件的第二小区的情况下，所述终端设备终止所述N次小区切换流程。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该装置中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第 一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该装置中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可以得到准确的下一个待切换小区。
一种示例性的方式中，所述发送模块还用于：所述终端设备接收所述第一小区的第一网络设备发送的测量配置消息。所述终端设备响应于所述测量配置消息向所述第一网络设备返回测量报告信息；所述测量报告信息包括所述终端设备的用户信息。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量；或，测量结束时刻、第二时间偏移量；或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述装置还包括：存储模块，用于存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本申请第五方面提供一种小区切换方法，包括：终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。第一小区的第一网络设备获取终端设备的用户信息。所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。所述第一网络设备向所述终端设备发送无线资源控制RRC消息，所述RRC消息中包括所述切换信息。所述终端设备接收所述第一网络设备发送的无线资源控制RRC消息。
本申请第六方面提供一种卫星通信系统，所述卫星通信系统包括第一网络设备和终端设备，其中：所述第一网络设备为第一方面及其任意实现方式中所述的第一网络设备，所述终端设备为第二方面及其任意实现方式中所述的终端设备。
本申请第七方面提供一种计算机存储介质，包括计算机程序指令，当其在计算机上运行时，使得所述计算机执行前述任意实现方式提供的方法。
本申请第八方面提供一种计算机程序产品，该计算机程序产品中包含计算机可读指令，当该计算机可读指令被处理器执行时实现前述任意实现方式提供的方法。
本申请第九方面提供一种无线通信装置，包括处理器、存储器和收发器，所述存储器用于存储计算机程序，所述收发器用于和其他设备通信，所述处理器用于执行所述存储器中存储的计算机程序，以使所述无线通信装置执行如本申请第一方面任一项所述的方法。
本申请第十方面提供一种无线通信装置，包括处理器、存储器和收发器，所述存储器用于存储计算机程序，所述收发器用于和其他设备通信，所述处理器用于执行所述存储器中存储的计算机程序，以使所述无线通信装置执行如本申请第二方面任一项所述的方法。
本申请第十一方面提供一种芯片上系统或系统芯片，所述芯片上系统或系统芯片可应用于网络设备，所述芯片上系统或系统芯片包括：至少一个通信接口，至少一个处理器，至少一个存储器，所述通信接口、存储器和处理器通过总线互联，所述处理 器通过执行所述存储器中存储的指令，使得所述网络设备可执行本申请第一方面所述的方法。
本申请第十二方面提供一种芯片上系统或系统芯片，所述芯片上系统或系统芯片可应用于终端设备，所述芯片上系统或系统芯片包括：至少一个通信接口，至少一个处理器，至少一个存储器，所述通信接口、存储器和处理器通过总线互联，所述处理器通过执行所述存储器中存储的指令，使得所述终端设备执行本申请第二方面所述的方法。
本申请实施例提供一种小区切换方法和装置，当前为终端设备提供服务的小区为第一小区，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
附图说明
图1为现有的5G网络架构的一种示意图；
图2为本申请实施例的小区切换方法的应用场景示意图；
图3为本申请实施例的一种小区切换方法的流程示意图；
图4为本申请实施例的一种终端设备的星内小区切换示意图；
图5为本申请实施例的一种终端设备的星间小区切换示意图；
图6为本申请实施例的又一种小区切换方法的流程示意图；
图7为本申请实施例的一种小区切换方法的信令交互流程示意图；
图8为本申请实施例的一种第一网络设备的功能结构示意图；
图9为本申请实施例的一种终端设备的功能结构示意图；
图10为本申请实施例的另一种第一网络设备的结构示意图；
图11为本申请实施例的另一种终端设备的结构示意图。
具体实施方式
本申请提供小区切换方法，本申请的方法可以应用在5G系统中，也可以应用在长期演进(long term evolution，LTE)中，5G系统也称为新无线通信系统、新接入技术(new radio，NR)或者下一代移动通信系统。
图1为卫星通信系统典型网络架构的示意图，如图1所示，卫星通信系统200包括终端设备201、卫星基站202、地面站203和核心网204。核心网204主要包括用户面功能(user plane function，UPF)单元205、移动性管理功能(access and mobility management function，AMF)单元206、会话管理功能(session management function，SMF)单元207和数据网络(data network，DN)208。终端设备201通过空口接入网络与卫星基站202通信，卫星基站202通过无线链路(如下一代网络(next generation，NG)接口)与地面的核心网204联接。同时，在卫星基站202之间也存在无线链路，通过Xn接口完成卫星基站与卫星基站之间的信令交互和用户数据传输。图2中的各个网元以及接口说明如下：
终端设备201在本申请实施例中可以指用户终端(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备201可以通过空口接入卫星网络并发起呼叫，上网等业务，可以是支持5G新空口(NR，new radio)的移动设备。典型的，终端设备201可以是移动电话、平板电脑、便携式笔记本电脑、虚拟\混合\增强现实设备、导航设备、地面基站(例如：新空口基站(NR nodeB，gNB))和地面站(ground station，GS)、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有卫星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、未来演进的公用陆地移动通信网络(public land mobile network，PLMN)或未来的其他通信系统中的终端设备等。
卫星基站202主要为终端设备201提供无线接入服务，调度无线资源给接入的终端设备，提供可靠的无线传输协议和数据加密协议等。卫星基站是指将人造地球卫星和高空飞行器等作为无线通信的基站，例如演进型基站和5G基站等。卫星基站可以是可以是非静止轨道的中轨道(medium earth orbit，MEO)卫星和低轨道(low earth orbit，LEO)卫星，还可以是高空通信平台(high altitude platform station，HAPS)等。
在本申请实施例中，地面站(ground station)203主要负责转发卫星基站202和核心网204之间的信令和业务数据。地面站一般是指设置在地球表面(包括设置在船舶或者飞机上)上进行人造卫星通信的地面设备。主要由可跟踪人造卫星的高增益天线系统、微波大功率发射系统、低噪声接收系统和电源系统等组成。
核心网(core network)204主要用于用户接入控制、计费，移动性管理，会话管理，用户安全认证，补充业务等。在本申请实施例中，核心网204主要包括用户面功能单元205、接入与移动管理功能单元206、会话管理功能单元207、数据网络208。AMF网元主要负责移动性管理、接入管理等服务。SMF网元主要负责会话管理、动态主机配置协议功能、用户面功能的选择和控制等。UPF网元主要负责对外连接到数据网络以及用户面的数据包路由转发、报文过滤、执行服务质量(quality of service，QoS)控制相关功能等。需要说明的是，这些功能单元可以独立工作，也可以组合在一起实现某些控制功能，如对终端设备的接入鉴权、安全加密、位置注册等接入控制和移动性管理功能，以及用户面传输路径的建立、释放和更改等会话管理功能。核心网中还包括其他功能单元，但不再一一列举。
示例的，图2为本申请实施例的小区切换方法应用于5G移动卫星通信系统的应用场景示意图。
卫星10可以向终端设备20提供通信服务，卫星10还可以连接到核心网设备30(该核心网设备30可以包括上述典型架构中的地面站，或者包括能够实现转发卫星基站或核心网业务数据和信令功能的网元)。每个卫星10可以服务多个小区101，每个小区有对应的小区标识，每个小区标识可以用于唯一标识该小区。终端设备20可以在不同的小区之实现切换。
本申请实施例中，执行终端设备侧方法的执行主体可以是终端设备，也可以是终端设备中的装置(需要说明的是，在本申请提供的实施例中以终端设备为例进行描述 的)。示例性地，终端设备中的装置可以是芯片系统、电路或者模块等，本申请不作限制。
本申请实施例中，执行第一网络设备侧方法的执行主体可以是第一网络设备，也可以是第一网络设备中的装置。示例性地，第一网络设备中的装置可以是芯片系统、电路或者模块等，本申请不作限制。
本申请实施例所涉及的终端设备可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(dentral processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
本申请实施例涉及的第一网络设备可以为卫星、基站、发送接收点(transmission reception point，TRP)或核心网设备等。
本申请实施例所涉及的第一小区可以是当前为终端设备提供服务的服务小区，为第一小区提供服务的是第一网络设备。
本申请实施例所涉及的第二小区可以是终端设备下一个可能切换连接的可配置小区(也即下一个待切换的小区)，为第二小区提供服务的是第二网络设备。可以理解，第二小区是一个相对概念，当终端设备切换到第二小区后，该第二小区就成为当前服务小区，而原第二小区的下一个待切换的小区就成为现在的第二小区，切换过程依次类推。
本申请实施例所涉及的小区切换可以是移动终端从当前的服务小区，切换连接到下一个待切换的小区，实现由服务小区向可配置小区的切换。
本申请实施例所涉及的连续的N次小区切换可以是：终端设备在一段时间内，依次执行从第1次切换到第N次切换的过程。可以理解，若在该段时间内，终端设备在该N次切换中有任一次没有切换成功，则结束该次连续切换过程。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图3为本申请实施例提供的一种小区切换方法的流程图，如图3所示，本实施例提供的方法包括以下步骤：
步骤S101：第一小区的第一网络设备获取终端设备的用户信息；其中，该第一小区为该终端设备当前的服务小区。
本申请实施例中，第一小区为终端设备当前的服务小区，当前的服务小区还可以理解为终端设备已接入的小区。
具体应用中，第一网络设备可以是为第一小区提供服务的设备，示例的，第一网络设备可以是卫星。
本申请实施例中，终端设备的用户信息可以是能够反映终端设备在第一小区中的信号质量变换趋势的信息，用户信息可以根据实际的应用场景具体确定，本申请实施 例对此不作具体限定。
步骤S102：该第一网络设备根据该用户信息和该第一网络设备的运行信息，确定该终端设备的切换信息，该切换信息用于指示该终端设备进行连续的N次小区切换，N为正整数。
本申请实施例中，在第一网络设备为卫星的情况下，第一网络设备的运行信息为卫星的运行信息。第一网络设备的运行信息可以用于反馈卫星的运行轨迹，第一网络设备的运行信息的具体内容可以根据实际的应用场景确定，本申请实施例对此不作具体限定。
本申请实施例中，切换信息用于指示该终端设备进行连续的N次小区切换，N为正整数。可以理解，切换信息只是用于指示终端设备进行连续的N次小区切换，实际应用中终端设备可以根据实际的应用场景确定具体的切换次数，示例的，终端设备可以根据切换信息的指示，进行完整的连续的N次小区切换，终端设备也可以在接收到切换信息后，只是进行N-1次或N-2次等小于N次的小区切换，N的具体取值可以根据实际应用场景确定，另外，还可以根据网络中用户发送或接受的信息、卫星网络的运行信息、或者两者的结合来确定。本申请实施例对此不作具体限定。
步骤S103：该第一网络设备向该终端设备发送RRC消息，该RRC消息中包括该切换信息。
本申请实施例中，RRC消息可以为条件切换命令(conditional handover，CHO)消息，也可以为其他消息，本申请实施例不作具体限定。
可以理解，终端设备在接收到第一网络设备的切换信息后，可以根据该切换信息，自动执行连续的N次小区切换，使得本申请实施例中，可以利用卫星的轨迹和终端设备的用户信息可预测特性一次性提前配置后续N次切换的测量事件和触发条件等，从而可以减少网络的信令流程和开销。N为正整数。
可选的，在步骤S101中，第一网络设备可以主动发起获取终端设备用户信息的动作。示例的，该第一小区的第一网络设备获取终端设备的用户信息，包括：该第一网络设备向该终端设备发送测量配置消息；该第一网络设备接收该终端设备响应于该测量配置消息返回的测量报告，该测量报告包括该终端设备的用户信息。
本申请实施例中，第一网络设备向终端设备发送的测量配置消息可以用于指示终端设备对用户信息进行测量，具体的，测量配置消息中可以携带配置切换信息所需要的配置项，该配置项可以根据实际的应用场景确定，本申请实施例对此不作具体限定。
终端设备响应于该测量配置消息，可以实现对该终端设备的用户信息的测量，并向第一网络设备返回包括该终端设备的用户信息的测量报告，则第一网络设备可以获取终端设备的用户信息，该用户信息可以根据实际的应用场景确定，本申请实施例对此不作具体限定。
可以理解，也可以由终端设备主动向第一网络设备上报用户信息，示例性的，终端设备可以周期性地主动向第一网络设备发送终端设备的用户信息，或者，终端设备检查到环境变换超过阈值后，触发向第一网络设备发送终端设备的用户信息，从而使得第一网络设备能够获取终端设备的用户信息。本申请实施例对第一小区的第一网络设备获取终端设备的用户信息不作具体限定。
可选的，在步骤S101中，该终端设备的用户信息包括下述至少一项：该终端设备的地理位置信息、该终端设备的业务类型信息、该终端设备的终端能力信息、该终端设备的运动状态信息。
本申请实施例中，终端设备的地理位置信息可以用于反馈终端设备距离第一小区的小区中心的距离。可以理解，终端设备距离第一小区的小区中心越近，终端设备的信号质量通常越好，适应的，终端设备就可以暂时不切换到其他小区。终端设备距离第一小区的小区中心越远，终端设备的信号质量通常越差，适应的，终端设备就可能需要切换到其他小区。
考虑到通常情况下，因为地面基站与终端设备的距离较近，终端设备在小区中心和小区边缘的参考信号接收功率(reference signal received power，RSRP)或参考信号接收质量(reference signal received quality，RSRQ)相差较大，因此，通常的终端设备在小区间切换主要依据的是终端设备在小区中的RSRP或RSRQ。但是，在NGEO卫星场景中，由于卫星与终端设备的距离较远，使得终端设备在小区中心和小区边缘的RSRP或RSRQ相差不大，无法通过RSRP或RSRQ判断终端设备相对于小区中心的位置，因此本申请实施例中，在终端设备的用户信息中，包括了终端设备的地理位置信息，通过终端设备的地理位置信息可以判断终端设备相对于小区中心的位置，使得本申请后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
终端设备的业务类型信息可以用于反馈终端设备当前的业务可能持续的时长，具体的，对于每个终端设备的业务，该业务的业务可能持续的时长可以是根据多个用户的历史行为数据统计的统计持续时间，示例的，若业务为视频播放，通常视频播放会持续较长时间，则视频播放业务的统计持续时间较长。可以理解，终端设备当前的业务可能持续时间越短，则终端设备越可能不需要进行小区切换就可以完成当前业务，终端设备当前的业务可能持续时间越长，终端设备越有可能需要在多个小区中进行多次切换。本申请实施例中，在终端设备的用户信息中，包括了终端设备的业务类型信息，通过终端设备的业务类型信息可以判断终端设备是否需要在多个小区中进行多次切换，使得本申请后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
终端设备的终端能力信息可以用于反馈终端设备处理业务以及与小区通信的质量，具体的，终端能力信息可以包括终端设备的网络环境、硬件能力(例如终端设备的屏幕的分辨率大小、中央处理器(Central Processing Unit，CPU)处理速度、摄像头分辨率等)、媒体处理能力(也即音视频编解码能力)、以及业务支持能力(例如调度、会议、即时通信等)等。可以理解，终端设备的终端能力信息越强，终端设备与第一小区之间的信号质量通常越好，适应的，终端设备就可以暂时不切换到其他小区。终端设备的终端能力信息越弱，终端设备的信号质量通常越差，适应的，终端设备就可能需要切换到其他小区。本申请实施例中，在终端设备的用户信息中，包括了终端设备的终端能力信息，通过终端设备的终端能力信息可以判断终端设备是否需要在多个小区中进行多次切换，使得本申请后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
终端设备的运动状态信息可以用于反馈终端设备处于低速、正常速度或者高速的运动状态，其中，低速、正常速度或者高速的具体速度值可以根据实际的应用场景设定，本申请实施例对此不作具体限定。可以理解，终端设备运动速度越快，终端设备越有可能需要在多个小区中进行切换。终端设备运动速度越慢，则终端设备越可能不需要进行小区切换或进行较少次的小区切换。本申请实施例中，在终端设备的用户信息中，包括了终端设备的运动状态信息，通过终端设备的运动状态信息可以判断终端设备是否需要在多个小区中进行多次切换，使得本申请后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
可选的，在步骤S102中，该第一网络设备的运行信息包括下述至少一项：该第一网络设备的位置信息，该第一小区的邻区信息。
本申请实施例中，根据第一网络设备的位置信息以及第一小区的邻区信息可以预测第一网络设备的运行轨迹，使得本申请实施例可以根据第一网络设备的运动信息以及终端设备的用户信息确定准确的终端设备的切换信息。
可选的，在步骤S102中，该切换信息包括N个切换项，每个该切换项包括：切换时间信息与至少一个第二小区的配置信息，该第二小区为下一个待切换的小区，每个该第二小区的配置信息包括：小区标识、小区频点值和切换条件。
本申请实施例中，每个切换项可以对应一次终端设备的小区切换。切换项中的切换时间信息可以用于指示终端设备的切换时间，切换项中的第二小区为根据实际的应用场景为终端设备配置的可配置小区，可以理解，第二小区(第二网络设备)是一个相对概念，当终端设备切换到第二小区后，该第二小区就成为当前服务小区(第一小区)，而原第二小区的下一个待切换的小区就成为当前的第二小区，切换过程依次类推，具体实施例情况可以参考图7的步骤S311至S316。第二小区的数量可以是一个，也可以是多个，可以理解，第二小区的数量是一个的情况下，可以减少第一网络设备的运算，提升运算效率。第二小区的数量为多个的情况下，若终端设备不能切换到其中一个第二小区，还可以选择切换到其他第二小区，切换的稳定性较高。还可以结合预测用户设备可能的运动方向来确定至少两个可切换的目标小区，其中至少一个作为备用目标小区。
具体应用中，第二小区的配置信息包括：小区标识、小区频点值和切换条件。小区标识具体可以是：第二小区的全球标识等，通过小区标识可以唯一确定一个小区。小区频点值可以是第二小区的通信频点，在终端设备切换到该第二小区时，需要切换到该第二小区的小区频点值，以实现在该第二小区内的通信。切换条件具体可以是：终端设备与该第二小区的信号质量大于预设第一门限值，则终端设备切换到该第二小区，或者，终端设备与该第二小区的信号质量的差值大于预设第二门限值，则终端设备切换到该第二小区，预设第一门限值和预设第二门限值可以根据实际应用场景确定，本申请实施例对此不作具体限定。可以理解，切换条件也可以根据实际的应用场景进行确定，使得终端设备切换到第二小区后，终端设备的信号质量比终端设备切换前的信号质量好即可，本申请实施例对切换条件不作具体限定。
具体的，对于每个切换项，切换时间信息可以包括测量开始时刻和测试结束时刻，终端设备可以在测量开始时刻测量与至少一个第二小区之间的信号质量，信号质量具 体可以是RSRP、RSRQ或接收信号强度指示(received signal strength indication，RSSI)等，若在测量开始时刻与测量结束时刻之间，终端设备与至少一个第二小区之间的信号质量满足至少一个第二小区中的任意一个的切换条件，则终端设备可以向该满足切换条件的任意一个第二小区发出切换请求，以请求切换到该满足切换条件的任意一个第二小区。
示例的，如表1所示，示出了包含N个切换项的切换信息的表格形式。其中，(tN_on，tN_off)为第N次切换对应的测量开始时刻和测试结束时刻，Cell_ID_N为第N次切换对应的小区标识，Freq_N为第N次切换对应的小区频点值，Signal_thresh_N为第N次切换对应的切换条件。
表1
Figure PCTCN2020090023-appb-000001
可选的，该N为1至8的任意正整数。
本申请实施例中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此根据实际的应用场景，示例性的，可以将N的最大值设为8，即在协议中，N的取值空间为N∈{1,2,3,4,5,6,7,8}，以得到准确的切换信息。可以理解，N的取值空间也可以是上述取值空间的子集(包含全集中的部分元素)，例如{1,2,4,5,6}、{4,5,6,7,8}、{4,6,8}。以上取值空间可以结合卫星能够为终端设备服务的时间确定，本申请实施例对此不作具体限定。
可选的，该终端设备的地理位置越靠近该第一小区的中心位置，该N的取值越大；或者，该终端设备的业务类型信息为业务的统计持续时间，该终端设备的业务的统计持续时间越长，该N的取值越大；或者，该终端设备的运动状态信息包括该终端设备的运动速度，该终端设备的运动速度越大，该N的取值越小；或者，该终端设备能力信息包括缓存能力和/或计算能力，该终端设备的缓存能力和/或计算能力越强，该N的取值越大。
示例的，一种N的计算方法可表示为：
Figure PCTCN2020090023-appb-000002
N∈{1,2,3,4,5,6,7,8}
其中，d和d max分别为终端设备离小区中心点的实际距离和最大距离，s和s max分别为终端设备的实际运动状态和最大运动状态值，λ和λ max分别为终端设备的业务持续时间和最大持续时间，c和c max分别为终端设备对应的终端能力和最大终端能力值。可以理解，实际应用中，根据上述公式计算得到的N值可能还需要进一步进行量化，并最终从集合{1,2,3,4,5,6,7,8}中取值。以上公式还可以考虑添加协调常量，以适应不同的应用场景特点。本申请实施例对此不作具体限定。
示例的，在一种场景中，根据终端设备的运动速度，将终端设备的运动状态信息s分为高、中、低三种状态。根据终端设备的地理位置距离服务小区中心的距离，将终端设备的地理位置信息d分为远、近两种状态。根据终端设备的当前运行的业务，将终端设备的业务类型信息λ分为长、短两种状态。根据终端设备的设备能力，将终端设备能力信息c分为强、弱两种状态。则，在d和s的组合场景的考虑中，N的取值可以如表2所示。
表2
场景 N值
(s高，d远) 1
(s中，d远) 2
(s低，d远) 3
(s高，d近) 4
(s中，d近) 5
(s低，d近) 6
可以理解，在(d，s，λ，c)的至少两个的组合中，N的取值都会有适应的变化，具体的N值都可以根据实际的应用场景根据终端设备的地理位置信息，和/或，终端设备的业务类型信息，和/或，终端设备的终端能力信息，和/或，终端设备的运动状态信息进行选取，且使得对于(d，s，λ，c)，在s、λ和c相同的情况下，该终端设备的地理位置d越靠近该第一小区的中心位置，该N的取值越大；或者，在s、d和c相同的情况下，该终端设备的业务类型信息λ为业务的统计持续时间，该终端设备的业务的统计持续时间越长，该N的取值越大；或者，在λ、d和c相同的情况下，该终端设备的运动状态信息s包括该终端设备的运动速度，该终端设备的运动速度越大，该N的取值越小；或者，在λ、d和s相同的情况下，该终端设备能力信息c包括缓存能力和/或计算能力，该终端设备的缓存能力和/或计算能力越强，该N的取值越大。本申请实施例对此不作具体限定。
本申请实施例中，可以根据终端设备的位置信息、运动状态、终端能力和业务类型等信息确定不同的准确的N值。
可选的，步骤S102之后，还可以包括：该第一网络设备根据该N个切换项中切 换时间信息确定最早切换时间段；该第一网络设备向目标小区的第二网络设备发送资源预留请求，该目标小区为该最早切换时间段对应的切换项包括的第二小区，该资源预留请求用于请求该目标小区的第二网络设备在该最早切换时间段为该终端设备预留资源；该第一网络设备接收该目标小区的第二网络设备的预留应答消息。
本申请实施例中，为了保证终端设备在切换时间信息内能够顺利切换到目标小区，需要目标小区在切换时间信息对应的切换时间段内，为终端设备预留资源，因此，第一网络设备可以在N个切换项中确定切换时间段最早的切换项，并向该切换项对应的第二小区发送资源预留请求，以请求该切换项对应的至少一个第二小区(也即目标小区)该最早切换时间段为该终端设备预留资源，适应的，目标小区的第二网络设备可以响应于该资源预留请求向第一网络设备发送预留应答消息，第一网络设备接收到目标小区的第二网络设备的预留应答消息，可以表明第二网络设备将在该最早切换时间段为该终端设备预留资源。
可以理解，若在该切换项的切换时间信息对应的切换时间段内，该切换项的第二小区的第二网络设备没有收到终端设备的切换请求，或者，该切换项的第二小区的第二网络设备收到终端设备的切换请求，但是没有切换成功，则第二网络设备可以自动释放该预留资源，以保障连续切换过程中资源的高效利用。
可选的，步骤S102之后，还可以包括：该第一网络设备存储该切换信息。
具体应用中，终端设备在卫星的小区中切换时，可以包括星内小区切换和星间小区切换。图4示出了星内小区切换的应用场景，如图4所示，终端设备在同一卫星的不同小区间进行切换，示例的，卫星从右向左运动，终端需要执行星内小区切换，即从卫星的小区1切换到小区2。图5示出了星间小区切换的应用场景，如图5所示，终端设备在不同卫星的不同小区间进行切换，示例的，卫星从右向左运动，终端需要执行星间小区切换，即从卫星1的小区1切换到卫星2的小区2。
在终端设备进行星内小区切换的情况下，将切换信息存储在卫星中，则卫星可以根据存储的切换信息在各切换项的切换时间信息内，自动在该切换项对应的第二小区为终端设备预留资源；在终端设备进行星间小区切换的情况下，将切换信息存储在作为第一网络设备的卫星中，则第一网络设备可以根据该存储的切换信息在各切换项的切换时间信息内，向该切换项对应的第二小区的第二网络设备发送资源预留请求，以请求第二网络设备为终端设备预留资源。
可选的，在步骤S103中，该RRC消息携带的切换命令(mobility controlInfo)信元(information element，IE)中包括该切换信息。
本申请实施例中，可以在RRC消息携带的切换命令信元中增加切换信息对应的字段，使得切换信息可以携带在RRC消息中发送给终端设备。
可选的，每个该切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量；或，测量结束时刻、第二时间偏移量；或，测量起始时刻和测量结束时刻。
示例的，在每个切换项包括的切换时间信息为测量起始时刻和测量结束时刻的情况下，对应的代码可以为：
Figure PCTCN2020090023-appb-000003
Figure PCTCN2020090023-appb-000004
其中，t-Meas-On可以是32比特，表示测量开始时刻，t-Meas-Off可以是32比特，表示测量开始时刻，targetSignalValue可以表示终端设备与至少一个第二小区之间的信号质量。
示例的，在每个切换项包括的切换时间信息为测量起始时刻和第一时间偏移量，或，测量结束时刻、第二时间偏移量的情况下，对应的代码可以为：
Figure PCTCN2020090023-appb-000005
其中，t-Meas-On可以是32比特，表示测量开始时刻或测量结束时刻，t-Offset表示第一时间偏移量或第二时间偏移量，targetSignalValue可以表示终端设备与至少一个第二小区之间的信号质量。
具体应用中，考虑到LEO卫星高度为600-1500km，最小速度为7km/s,小区直径典型值为200km，则用户在小区内的最大驻留时间约为30s。采用10ms的时间精度，则t-offset最大值为3000，用12bit可以表征，因此，第一时间偏移量和第二时间偏移量可以设定为12bit。
需要说明的是，第一网络设备也可以是与卫星通信的核心网设备。可以理解，在第一网络设备为核心网设备的情况下，卫星可以仅作为接收和发送的设备，第一网络设备的运行信息可以为与该核心网设备通信的卫星的运行信息，确定本申请实施例的小区切换的各步骤均通过核心网设备执行，从而可以通过核心网设备降低卫星的运算负荷，具体的确定小区切换的方法与第一网络设备为卫星的方式类似，在此不再赘述。
综上所述，本申请实施例提供一种小区切换方法和设备，当前为终端设备提供服务的小区为第一小区，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
图6为本申请实施例提供的又一种小区切换方法的流程图，如图6所示，本实施例提供的方法包括以下步骤：
步骤S201：终端设备向第一小区的第一网络设备发送该终端设备的用户信息；其中，该第一小区为该终端设备当前的服务小区。
具体的终端用户的用户信息可以参照图3对应的实施例的记载，在此不再赘述。
步骤S202：该终端设备接收该第一网络设备发送的无线资源连接RRC消息；其中，该RRC消息包括切换信息，该切换信息为根据该用户信息和该第一网络设备的运行信息确定的，该切换信息用于指示该终端设备进行连续的N次小区切换，N为正整数。
可选的，该第一网络设备的运行信息包括下述至少一项：该第一网络设备的位置信息，该第一小区的邻区信息。
可选的，该切换信息包括N个切换项，每个该切换项包括：切换时间信息与至少一个第二小区的配置信息，该第二小区为下一个待切换的小区，每个该第二小区的配置信息包括：小区标识、小区频点值和切换条件。
可选的，该终端设备根据该切换信息进行连续的N次小区切换，包括：该终端设备根据该N个切换项包括的切换时间信息的前后顺序排列进行切换。其中，该终端设备根据每个切换项进行切换包括：在该切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量，在该切换项包括的第二小区中的目标小区的信号质量满足该目标小区的切换条件的情况下，向该目标小区发送切换指令，在该终端设备切换到该目标小区的情况下，该终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作。
本申请实施例中，终端设备在接收到切换信息后，可以存储该切换信息，并根据该切换信息进行连续的N次小区切换。具体的，终端设备可以按照N个切换项包括的切换时间信息的先后顺序进行切换，对于第n个切换项，n为1至N之间的整数，终端设备根据该第n个切换项进行切换包括：终端设备被根据自己的时钟t，在tn_on(第n个切换项的测试起始时刻)<t<tn_off(第n个切换项的测试结束时刻)时，测试与该第n个切换项包括的第二小区的信号质量，将信号质量满足该第二小区的切换条件的小区作为目标小区，向目标小区发送切换指令，进而可以执行同步、接入和切换应答等小区切换流程。在该终端设备切换到该目标小区的情况下，该终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作，切换过程与该第n个切换项的方式类似，在此不再赘述。
可选的，在该切换项包括的切换时间内没有信号质量满足切换条件的第二小区的情况下，说明该切换信息不符合终端设备的切换实际，则该终端设备可以终止该N次小区切换流程。进一步可以由终端设备或第一网络设备在此发起小区切换的重新配置流程。
可以理解，终端设备在完成第n个切换项的切换后，可以删除该第n个切换项，以避免该第n个切换项对资源的占用。
可选的，该N为1至8的任意正整数。
可选的，该终端设备的地理位置越靠近该第一小区的中心位置，该N的取值越大；或者，该终端设备的业务类型信息为业务的统计持续时间，该终端设备的业务的统计持续时间越长，该N的取值越大；或者，该终端设备的运动状态信息包括该终端设备的运动速度，该终端设备的运动速度越大，该N的取值越小；或者，该终端设备能力信息包括缓存能力和/或计算能力，该终端设备的缓存能力和/或计算能力越强，该N的取值越大。
可选的，该RRC消息携带的切换命令信元中包括该切换信息。
可选的，每个该切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量；或，
测量结束时刻、第二时间偏移量；或，测量起始时刻和测量结束时刻。
可选的该第一网络设备为卫星，或与卫星通信的核心网设备。
本发明实施例的N的确定方式等可以参照图3对应的实施例的记载，在次不再赘述。
可选的，在步骤S201中，终端设备可以被动的向第一网络设备发送该终端设备的用户信息。具体的，该终端设备向第一小区的第一网络设备发送该终端设备的用户信息，包括：该终端设备接收该第一小区的第一网络设备发送的测量配置消息；该终端设备响应于该测量配置消息向该第一网络设备返回测量报告信息；该测量报告信息包括该终端设备的用户信息。
可以理解，终端设备可以主动的向第一网络设备发送该终端设备的用户信息，示例的，终端设备根据实际应用场景主动向第一网络设备发送终端设备的用户信息。本申请实施例对此不作具体限定。
可选的，该终端设备的用户信息包括下述至少一项：该终端设备的地理位置信息、该终端设备的业务类型信息、该终端设备的终端能力信息、该终端设备的运动状态信息。综上所述，本申请实施例提供一种小区切换方法和设备，当前为终端设备提供服务的小区为第一小区，终端设备向第一小区的第一网络设备发送该终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以接收到该切换信息，并可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，终端设备只需要向第一小区的第一网络设备发送一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
图7为本申请实施例的一种小区切换方法的信令交互流程示意图。如图7所示，本申请实施例的小区切换方法的信令交互可以包括：
步骤S301：第一小区的第一网络设备向终端设备发送测量配置消息。
具体应用中，第一网络设备可以通过测量配置(measurement configuration)消息将具体的测量配置项发送给终端设备。
需要说明的是，本申请实施例中，正常情况下，该测量配置消息只需要在终端设备与第一网络设备初始建立RRC连接时下发一次即可，直到终端设备连续N次的切 换完成后，进入重新配置切换信息的过程，发送新的测量配置消息。
可以理解，若终端设备在N次连续切换中的任意一次未能成功切换，也需要再次发送新的测量配置消息，进入重新配置切换信息的过程。
步骤S302：终端设备向第一网络设备发送测量报告信息，该测量报告信息包括该终端设备的用户信息。
具体应用中，终端设备接收到测量配置消息后，可以测量终端设备的用户信息，并通过测量报告(Measurement report)消息将包括该终端设备的用户信息的测量报告信息反馈至第一网络设备。
本申请实施例中，正常情况下，该测量报告消息与测量配置消息对应，通常只需发送一次，直到终端设备连续N次的切换完成后，进入重新配置切换信息的过程，响应于新的测量配置消息，发送新的测量报告消息。
步骤S303：第一网络设备根据该用户信息和该第一网络设备的运行信息确定切换信息。
具体应用中，第一网络设备在确定切换信息后，可以将该切换信息存储，以通过存储的切换信息进行后续的操作。
步骤S304：第一网络设备向第1个切换项中的第二小区所对应的第二网络设备发送资源预留请求。
具体应用中，第一网络设备可以通过预留切换请求(Early HO Request)消息向第1个切换项中的第二小区所对应的第二网络设备发送资源预留请求，请求第二网络设备在第1个切换项中的切换时间信息内预留资源。可以理解，该过程也可对应多个第二小区，即请求多个第二小区在指定时间段预留资源，以保障切换的鲁棒性。因为每个第二小区的第二网络设备与终端设备的通信过程相似，因此，本申请实施例中仅以一个第二小区为例进行说明。
步骤S305：第二网络设备向第一网络设备发送预留应答消息。
具体应用中，第二网络设备可以在第1切换项的切换时间信息对应的时间段内为终端设备预留资源，并通过预留切换确认字符(Early HO Acknowledgement)作为预留应答消息给予应答。
步骤S306：第一网络设备向终端设备发送无线资源连接RRC消息，该RRC消息包括切换信息。
具体应用中，第一网络设备可以通过RRC消息将切换信息发送给终端设备，具体的RRC消息可以是切换命令(CHO command)消息。
步骤S307：终端设备在第1个切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量。
具体应用中，终端设备可以在切换信息中第一个切换项包括的切换时间信息内，对终端设备与该第一个切换项包括的第二小区的信号质量进行测量。
步骤S308：终端设备在该第1个切换项包括的第二小区中的目标小区的信号质量满足该目标小区的切换条件的情况下，发送同步和随机访问消息至目标小区的第二网络设备。
步骤S309：终端设备向第二网络设备发送切换确认消息。
具体应用中，终端设备在该第1个切换项包括的第二小区中的目标小区的信号质量满足该目标小区的切换条件的情况下，可以向第二网络设备发起切换，通常的，可以先发送同步和随机访问(synchronization and randorm access)消息至第二网络设备，然后发送切换确认(HO confirm)消息至第二网络设备，执行终端设备从第一网络设备向第二网络设备的切换。
可以理解，在终端设备成功切换到第二网络设备后，终端设备可以删除第1个切换项，以减少资源占用。
步骤S310：第二网络设备向第一网络设备发送切换完成消息。
具体应用中，第二网络设备可以向第一网络设备发送切换完成(HO complete)消息，表示终端设备从第一网络设备到第二网络设备切换成功。
步骤S311：第N-1网络设备向第N网络设备发送资源预留请求。N-1为大于等于2的正整数。
步骤S312：第N网络设备向第N-1网络设备发送预留应答消息。
具体应用中，在终端设备成功切换到第二网络设备后，第二网络设备可以接手第一网络设备的功能，向第三网络设备发送资源预留请求，并接收第三网络设备的预留应答消息。
依次类推，在终端设备成功切换到第N-1网络设备后，第N-1网络设备可以接手第N-2网络设备的功能，向第N网络设备发送资源预留请求，并接收第N网络设备的预留应答消息。
可以理解，第二小区(第二网络设备)可以是一个相对概念，当终端设备切换到第二小区后，该第二小区就成为当前服务小区(第一小区)，而原第二小区的下一个待切换的小区(第三小区)就成为当前的第二小区，切换过程依次类推。同样的，切换信息中包含的任一个切换项中的至少一个第二小区的配置信息也是同样的相对概念。
步骤S313：终端设备在第N1个切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量。
步骤S314：终端设备在该第N个切换项包括的第二小区中的目标小区的信号质量满足该目标小区的切换条件的情况下，发送同步和随机访问消息值目标小区的第N网络设备。
步骤S315：终端设备向第N网络设备发送切换确认消息。
步骤S316：第N网络设备向第N-1网络设备发送切换完成消息。
具体应用中，终端设备在该第N个切换项包括的第二小区中的目标小区的信号质量满足该目标小区的切换条件的情况下，可以向第N网络设备发起切换，通常的，可以先发送同步和随机访问(synchronization and randorm access)消息至第N网络设备，然后发送切换确认(HO confirm)消息至第N网络设备，执行终端设备从第N-1网络设备向第N网络设备的切换。从而实现终端设备的连续N次小区切换。
值得注意的是，在上述信令流程中，只有第一次对应的切换才需要执行测量配置和测量报告对应的信令流程，第二次至第N次的切换都不需要执行上述测量配置和测量报告对应的信令流程，从而可以减少信令开销。
综上所述，本申请实施例中，通过一次提前配置后续N次切换的连续切换信令流 程，节省了N-1次终端设备和网络设备之间的Measurement configuration和Measurement report带来的信令开销。
图8为本申请实施例提供的一种第一网络设备的功能结构示意图，如图8所示，该第一网络设备包括：
获取模块41，用于获取终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。确定模块42，用于根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。发送模块43，用于向所述终端设备发送无线资源控制(radio resource control，RRC)消息，所述RRC消息中包括所述切换信息。
该装置中，第一小区的第一网络设备获取终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，第一网络设备只需获取一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
一种示例性的方式中，所述获取模块41还用于：向所述终端设备发送测量配置消息，接收所述终端设备响应于所述测量配置消息返回的测量报告，所述测量报告包括所述终端设备的用户信息。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该装置中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该装置中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可 以得到准确的下一个待切换小区。
一种示例性的方式中，所述装置还包括：资源预留模块，用于根据所述N个切换项中切换时间信息确定最早切换时间段，向目标小区的第二网络设备发送资源预留请求，所述目标小区为所述最早切换时间段对应的切换项包括的第二小区，所述资源预留请求用于请求所述目标小区的第二网络设备在所述最早切换时间段为所述终端设备预留资源，接收所述目标小区的第二网络设备的预留应答消息。
该方法中，因为第二网络设备在指定时间内为终端设备预留资源，因此，可以避免终端设备向第二网络设备切换时，因为资源占用导致的切换失败的现象，从而可以保证切换的鲁棒性。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量。或，测量结束时刻、第二时间偏移量或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述装置还包括：存储模块，用于存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本实施例的第一网络设备，可用于执行第一网上设备对应的方法，具体实现方式和技术效果类似，这里不再赘述。
图9示出了本申请实施例提供的一种终端设备的功能结构示意图，如图9所示，该终端设备包括：
发送模块51，用于向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区。接收模块52，用于接收所述第一网络设备发送的无线资源控制RRC消息，其中，所述RRC消息包括切换信息，所述切换信息为根据所述用户信息和所述第一网络设备的运行信息确定的，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。
该装置中，终端设备向第一小区的第一网络设备发送该终端设备的用户信息，进而第一网络设备可以根据用户信息和第一网络设备的运行信息，确定切换信息，使得第一网络设备向终端设备发送包含切换信息的RRC消息后，终端设备可以接收到该切换信息，并可以根据切换信息进行连续的N次小区切换，在该N次小区切换中，终端设备只需要向第一小区的第一网络设备发送一次用户信息，就能够一次性提前配置后续N次切换的切换条件，从而可以减少网络的信令流程和开销，进而可以减少切换的响应时间，使得本申请实施例适用于卫星场景中的网络切换。
一种示例性的方式中，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
一种示例性的方式中，所述终端设备根据所述切换信息进行连续的N次小区切换，包括：所述终端设备根据所述N个切换项包括的切换时间信息的前后顺序排列进行切换。其中，所述终端设备根据每个切换项进行切换包括：在该切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量，在该切换项包括的第二小区中的目 标小区的信号质量满足所述目标小区的切换条件的情况下，向所述目标小区发送切换指令，在所述终端设备切换到所述目标小区的情况下，所述终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作。
一种示例性的方式中，所述终端设备根据每个切换项进行切换，还包括：在该切换项包括的切换时间内没有信号质量满足切换条件的第二小区的情况下，所述终端设备终止所述N次小区切换流程。
一种示例性的方式中，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
该装置中，考虑到终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够较好的反馈终端设备的信号质量变换情况，因此，将终端设备的地理位置信息、业务类型信息、终端能力信息以及运动状态信息能够使得后续依据终端设备的用户信息确定切换信息时，能够得到较为准确的切换信息。
一种示例性的方式中，所述终端设备的地理位置越靠近所述第一小区的中心位置，所述N的取值越大。或者，所述终端设备的业务类型信息为业务的统计持续时间，所述终端设备的业务的统计持续时间越长，所述N的取值越大。或者，所述终端设备的运动状态信息包括所述终端设备的运动速度，所述终端设备的运动速度越大，所述N的取值越小。或者，所述终端设备能力信息包括缓存能力和/或计算能力，所述终端设备的缓存能力和/或计算能力越强，所述N的取值越大。
一种示例性的方式中，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
一种示例性的方式中，所述N为1至8的任意正整数。
该装置中，考虑到单个卫星的过顶时间及波束分布情况，若N的值过大，可能无法为终端设备分配到准确的可配置切换小区，因此将N的取值设定在1至8之间，可以得到准确的下一个待切换小区。
一种示例性的方式中，所述发送模块还用于：所述终端设备接收所述第一小区的第一网络设备发送的测量配置消息。所述终端设备响应于所述测量配置消息向所述第一网络设备返回测量报告信息；所述测量报告信息包括所述终端设备的用户信息。
一种示例性的方式中，所述RRC消息携带的切换命令信元中包括所述切换信息。
一种示例性的方式中，每个所述切换项包括的切换时间信息为：测量起始时刻和第一时间偏移量；或，测量结束时刻、第二时间偏移量；或，测量起始时刻和测量结束时刻。
一种示例性的方式中，所述装置还包括：存储模块，用于存储所述切换信息。
一种示例性的方式中，所述第一网络设备为卫星，或与卫星通信的核心网设备。
本实施例的终端设备，可用于执行终端设备对应的方法，具体实现方式和技术效果类似，这里不再赘述。
图10为本申请实施例提供的另一种第一网络设备的结构示意图，如图10所示，该第一网络设备包括：处理器61、存储器62和收发器63，该存储器62用于存储计算 机程序，该收发器63用于和其他设备通信，该处理器61用于执行该存储器62中存储的计算机程序，以使该第一网络设备61执行如上述实施例中第一网络设备执行的方法。
图11为本申请实施例提供的另一种终端设备的结构示意图，如图11所示，该终端设备包括：处理器71、存储器72和收发器73，该存储器72用于存储计算机程序，该收发器73用于和其他设备通信，该处理器71用于执行该存储器72中存储的计算机程序，以使该网络设备71执行如上述实施例中终端设备执行的方法。
本申请实施例还提供一种卫星通信系统，所述卫星通信系统包括第一网络设备和终端设备，其中：所述第一网络设备为上述任意实现方式中所述的第一网络设备，所述终端设备为上述任意实现方式中所述的终端设备。
本申请实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机可读指令，当该计算机可读指令被处理器执行时实现前述任意实现方式提供的方法。
本申请实施例还提供一种计算机程序产品，该计算机程序产品中包含计算机可读指令，当该计算机可读指令被处理器执行时实现前述任意实现方式提供的方法。
本申请实施例还提供一种芯片上系统或系统芯片，所述芯片上系统或系统芯片可应用于网络设备，所述芯片上系统或系统芯片包括：至少一个通信接口，至少一个处理器，至少一个存储器，所述通信接口、存储器和处理器通过总线互联，所述处理器通过执行所述存储器中存储的指令，使得所述网络设备可执行第一网络设备侧的方法。
本申请实施例还提供一种芯片上系统或系统芯片，所述芯片上系统或系统芯片可应用于终端设备，所述芯片上系统或系统芯片包括：至少一个通信接口，至少一个处理器，至少一个存储器，所述通信接口、存储器和处理器通过总线互联，所述处理器通过执行所述存储器中存储的指令，使得所述终端设备执行终端设备侧的方法。
可以理解，本申请实施例中第一网络设备或者终端设备中使用的处理器可以是中央处理器(CPU)，通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)，现场可编程门阵列(FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。该处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
本申请实施例该的总线可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，本申请附图中的总线并不限定仅有一根总线或一种类型的总线。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，该单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
该作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示 的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例该方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (21)

  1. 一种小区切换方法，其特征在于，包括：
    第一小区的第一网络设备获取终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区；
    所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数；
    所述第一网络设备向所述终端设备发送无线资源控制RRC消息，所述RRC消息中包括所述切换信息。
  2. 根据权利要求1所述的方法，其特征在于，
    所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件，N为正整数。
  3. 根据权利要求1-2任一项所述的方法，其特征在于，所述第一小区的第一网络设备获取终端设备的用户信息，包括：
    所述第一网络设备向所述终端设备发送测量配置消息；
    所述第一网络设备接收所述终端设备响应于所述测量配置消息返回的测量报告，所述测量报告包括所述终端设备的用户信息。
  4. 根据权利要求1所述的方法，其特征在于，所述终端设备的用户信息包括下述至少一项：
    所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述N为1至8的任意正整数。
  7. 根据权利要求2所述的方法，其特征在于，所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定切换信息之后，还包括：
    所述第一网络设备根据所述N个切换项中切换时间信息确定最早切换时间段；
    所述第一网络设备向目标小区的第二网络设备发送资源预留请求，所述目标小区为所述最早切换时间段对应的切换项包括的第二小区，所述资源预留请求用于请求所述目标小区的第二网络设备在所述最早切换时间段为所述终端设备预留资源；
    所述第一网络设备接收所述目标小区的第二网络设备的预留应答消息。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述RRC消息携带的切换命令信元中包括所述切换信息。
  9. 根据权利要求2或7所述的方法，其特征在于，每个所述切换项包括的切换时间信息为：
    测量起始时刻和第一时间偏移量；或，
    测量结束时刻、第二时间偏移量；或，
    测量起始时刻和测量结束时刻。
  10. 一种小区切换方法，其特征在于，包括：
    终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区；
    所述终端设备接收所述第一网络设备发送的无线资源控制RRC消息，其中，所述RRC消息包括切换信息，所述切换信息为根据所述用户信息和所述第一网络设备的运行信息确定的，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数。
  11. 根据权利要求10所述的方法，其特征在于，所述切换信息包括N个切换项，每个所述切换项包括：切换时间信息与至少一个第二小区的配置信息，所述第二小区为下一个待切换的小区，每个所述第二小区的配置信息包括：小区标识、小区频点值和切换条件。
  12. 根据权利要求11所述的方法，其特征在于，所述终端设备根据所述切换信息进行连续的N次小区切换，包括：
    所述终端设备根据所述N个切换项包括的切换时间信息的前后顺序排列进行切换；
    其中，所述终端设备根据每个切换项进行切换包括：
    在该切换项包括的切换时间信息内测量该切换项包括的第二小区的信号质量；
    在该切换项包括的第二小区中的目标小区的信号质量满足所述目标小区的切换条件的情况下，向所述目标小区发送切换指令；
    在所述终端设备切换到所述目标小区的情况下，所述终端设备执行与该切换项的切换时间信息相邻的下一个切换项的切换操作。
  13. 根据权利要求10-11任一项所述的方法，其特征在于，所述终端设备的用户信息包括下述至少一项：所述终端设备的地理位置信息、所述终端设备的业务类型信息、所述终端设备的终端能力信息、所述终端设备的运动状态信息。
  14. 根据权利要求10-13任一项所述的方法，其特征在于，所述第一网络设备的运行信息包括下述至少一项：所述第一网络设备的位置信息，所述第一小区的邻区信息。
  15. 根据权利要求10-14任一项所述的方法，其特征在于，所述N为1至8的任意正整数。
  16. 根据权利要求10-15任一项所述的方法，其特征在于，所述终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，包括：
    所述终端设备接收所述第一小区的第一网络设备发送的测量配置消息；
    所述终端设备响应于所述测量配置消息向所述第一网络设备返回测量报告信息；所述测量报告信息包括所述终端设备的用户信息。
  17. 根据权利要求10-16任一项所述的方法，其特征在于，所述RRC消息携带的切换命令信元中包括所述切换信息。
  18. 根据权利要求11所述的方法，其特征在于，每个所述切换项包括的切换时间信息为：
    测量起始时刻和第一时间偏移量；或，
    测量结束时刻、第二时间偏移量；或，
    测量起始时刻和测量结束时刻。
  19. 一种小区切换方法，其特征在于，所述方法包括：
    终端设备向第一小区的第一网络设备发送所述终端设备的用户信息，其中，所述第一小区为所述终端设备当前的服务小区；
    第一小区的第一网络设备获取终端设备的用户信息；
    所述第一网络设备根据所述用户信息和所述第一网络设备的运行信息，确定所述终端设备的切换信息，所述切换信息用于指示所述终端设备进行连续的N次小区切换，N为正整数；
    所述第一网络设备向所述终端设备发送无线资源控制RRC消息，所述RRC消息中包括所述切换信息；
    所述终端设备接收所述第一网络设备发送的无线资源控制RRC消息。
  20. 一种无线通信装置，其特征在于，包括处理器、存储器和收发器，所述存储器用于存储计算机程序，所述收发器用于和其他设备通信，所述处理器用于执行所述存储器中存储的计算机程序，以使所述无线通信装置执行如权利要求1-9任一项所述的方法，或者执行如权利要求10-18任一项所述的方法。
  21. 一种计算机可读存储介质，其特征在于，包括计算机程序指令，当其在计算机上运行时，使得所述计算机执行如权利要求1-9任一项所述的方法，或者执行如权利要求10-18任一项所述的方法。
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