WO2023098868A1 - Inter-satellite handover method, satellite-borne base station, core network device, and storage medium - Google Patents

Inter-satellite handover method, satellite-borne base station, core network device, and storage medium Download PDF

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Publication number
WO2023098868A1
WO2023098868A1 PCT/CN2022/136179 CN2022136179W WO2023098868A1 WO 2023098868 A1 WO2023098868 A1 WO 2023098868A1 CN 2022136179 W CN2022136179 W CN 2022136179W WO 2023098868 A1 WO2023098868 A1 WO 2023098868A1
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WIPO (PCT)
Prior art keywords
terminal
satellite
base station
target
handover request
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PCT/CN2022/136179
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French (fr)
Chinese (zh)
Inventor
陈山枝
王胡成
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大唐移动通信设备有限公司
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Publication of WO2023098868A1 publication Critical patent/WO2023098868A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment

Definitions

  • the present application relates to the communication field, and in particular to a method for inter-satellite handover, an on-board base station, core network equipment and a storage medium.
  • the ground service beam of the satellite where the space-borne base station is located needs to use spot beams to provide services for terminals, and it cannot be guaranteed that the earth's surface is completely covered by service beams. Coverage, that is, only non-contiguous coverage can be provided.
  • the satellite where the on-board base station is located can only provide discontinuous coverage to the terminal, after the current satellite moves and the service beam of the current satellite cannot continue to cover the designated area, there is no guarantee that other satellites will continue to cover the designated area with service beams. This will cause the terminals located in the designated area to be unable to handover to a suitable satellite access cell, thus causing the handover failure of the terminal in the designated area to access the cell and causing service interruption.
  • the present application provides an inter-satellite handover method, an on-board base station, core network equipment, and a storage medium to solve the technical problem existing in the prior art that it is difficult to handover a terminal to a suitable satellite access cell.
  • a method for inter-satellite handover provided in the embodiment of the present application is applied to the source satellite-borne base station.
  • the technical solution of the method is as follows:
  • the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment
  • a possible implementation manner, determining a target satellite for a terminal that needs to perform inter-satellite handover, includes:
  • the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
  • a possible implementation manner after determining the target satellite for the terminal that needs to perform inter-satellite handover, further includes:
  • the Xn handover request carries the current position of the terminal or the beam information currently serving the terminal, and the beam information includes wave position, and tracking ( Tracking Area, TA) area or the cell global identifier (CGI) generated by the source satellite-borne base station according to the current location mapping of the terminal.
  • TA Tracking Area
  • CGI cell global identifier
  • a possible implementation manner, determining a target satellite for a terminal that needs to perform inter-satellite handover, includes:
  • the beam information of the terminal includes the beam position, the tracking area TA area, or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
  • sending a second N2 handover request to the core network where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
  • the embodiment of the present application provides a method for inter-satellite handover, which is applied to a target on-board base station, and the method includes:
  • Adjusting the beam according to the received location-related information of the terminal wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
  • the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  • the method before adjusting the beam according to the received position-related information of the terminal, the method further includes:
  • the N2 handover request carries the location-related information
  • the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  • a possible implementation manner after receiving the Xn handover request from the source spaceborne base station, or after receiving the N2 handover request from the core network, further includes:
  • a beam scheduling request is sent to the satellite operation and control center; wherein the beam scheduling request is used to request to increase the target satellite carrier
  • the target satellite where the base station is located covers the beam of the terminal.
  • a possible implementation manner, before receiving the N2 handover request from the core network, further includes:
  • the embodiment of the present application provides a method for inter-satellite handover, which is applied to core network equipment, and the method includes:
  • the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
  • the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal is handed over to the target on-board base station.
  • determining a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information includes:
  • a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  • the embodiment of the present application also provides a source satellite-borne base station, including:
  • the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute the steps of the method provided by the first aspect above.
  • the embodiment of the present application provides a target satellite-borne base station, including:
  • the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute the steps of the method provided by the second aspect above.
  • the embodiment of the present application provides a core network device, including:
  • the memory is used to store the computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and execute the steps of the method provided by the third aspect above.
  • the embodiment of the present application also provides a source satellite-borne base station, including:
  • the determination unit is configured to determine a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
  • a switching unit configured to switch the terminal to a target on-board base station on the target satellite.
  • the embodiment of the present application provides a target satellite-borne base station, including:
  • An adjusting unit configured to adjust the beam according to the received position-related information of the terminal; wherein, the adjusted beam covers the terminal, and the position-related information includes the current position of the terminal or beam information serving the terminal ;
  • the sending unit is configured to return feedback information for completing beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  • the embodiment of the present application provides a core network device, including:
  • the receiving unit is configured to receive the first N2 handover request sent by the source satellite-borne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or serves the terminal beam information; or receive a second N2 handover request sent by the source spaceborne base station, and initiate a process of locating the terminal according to the second N2 handover request, and acquire the current location of the terminal; the second N2 The handover request does not carry the target cell information or carries the purpose of the target access cell to be determined;
  • a determining unit configured to determine a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information;
  • a sending unit configured to send an N2 handover request to a target spaceborne base station on the target satellite, where the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to The target satellite-borne base station.
  • the embodiment of the present application further provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to the first aspect or the second aspect.
  • the embodiments of the present application have at least the following technical effects:
  • the target satellite that can provide services for the terminal after adjusting the beam is determined for the terminal that needs to perform inter-satellite handover, so that in the case of non-continuous coverage of the satellite beam, it is avoided that there is no suitable target satellite
  • the terminal is then handed over to the target satellite-borne base station on the target satellite to prevent the terminal's service from being interrupted.
  • Figure 1 is a schematic diagram of the 5G architecture supporting spaceborne base stations
  • FIG. 2 is a schematic diagram of the movement of the satellite-borne base station relative to the service area of the core network
  • FIG. 3 is a schematic diagram of a satellite beam non-continuous coverage terminal
  • FIG. 4 is a flow chart of the inter-satellite handover method on the source satellite-borne base station side provided by the embodiment of the present application;
  • FIG. 5 is an interactive schematic diagram 1 of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
  • FIG. 6 is a second schematic diagram of interaction of a terminal switching from a source on-board base station to a target on-board base station according to an embodiment of the present application;
  • FIG. 7 is a third schematic diagram of interaction of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
  • FIG. 8 is a fourth schematic diagram of interaction of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
  • FIG. 9 is a fifth schematic diagram of interaction of a terminal switching from a source on-board base station to a target on-board base station according to an embodiment of the present application.
  • FIG. 10 is a flow chart of an inter-satellite handover method on the target on-board base station side provided by an embodiment of the present application.
  • FIG. 11 is a flow chart of the inter-satellite handover method on the core network device side provided by the embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a source satellite-borne base station provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a target spaceborne base station provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a core network device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of another source satellite-borne base station provided by the embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of another target spaceborne base station provided by the embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of another core network device provided by an embodiment of the present application.
  • the applicable system can be Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet Wireless business (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Long term evolution advanced (LTE-A) system, Universal Mobile Telecommunications System (UMTS), Worldwide interoperability for Microwave Access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Long term evolution advanced
  • UMTS Universal
  • the terminal device involved in this embodiment of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • the name of the terminal equipment may be different.
  • the terminal equipment may be called User Equipment (User Equipment, UE).
  • the wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • a mobile terminal equipment such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • PCS Personal Communication Service
  • SIP Session Initiated Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Wireless terminal equipment can also be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (mobile), remote station (Remote Station), access point (Access Point) , Remote Terminal (Remote Terminal), Access Terminal (Access Terminal), User Terminal (User Terminal), User Agent (User Agent), and User Device (User Device), which are not limited in the embodiments of this application.
  • the network equipment involved in this embodiment of the present application may be a base station.
  • a base station When a base station is installed on a satellite, it is called a satellite-borne base station.
  • the base station may include multiple cells that provide services for terminals.
  • the base station can also be called an access point, or it can be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names.
  • the network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network.
  • IP Internet Protocol
  • Network devices may also coordinate attribute management for the air interface.
  • the network equipment involved in the embodiment of the present application may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a Long Term Evolution (LTE) system (Evolutional Node B, eNB or e-NodeB), the 5G base station (gNB) in the 5G network architecture (Next Generation System), can also be the home evolution base station (Home evolved Node B, HeNB), relay node (Relay Node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present application.
  • the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, and the Centralized Unit and the Distributed Unit may also be arranged geographical
  • Figure 1 Please refer to Figure 1 for a schematic diagram of the 5G architecture supporting spaceborne base stations.
  • the space-borne base station deployed on the satellite When the space-borne base station deployed on the satellite is connected to the ground 5G system, the space-borne base station needs to support N1/N2/N3 interfaces, and these interfaces need to be carried on the satellite wireless link (feeder link), and the space-borne base station and the terminal
  • the communication uses the NR Uu interface.
  • the spaceborne base station communicates with the gateway station through the NG interface.
  • the gateway station communicates with the 5G core network through the NG interface (supporting N1/N2/N3), and the 5G core network communicates with the data network through the N6 interface.
  • FIG. 2 is a schematic diagram of the movement of the spaceborne base station relative to the service area of the core network.
  • the spaceborne base station will periodically enter and leave the service area of a terrestrial 5G core network.
  • the spaceborne base station enters the service area 1 of the ground 5G core network at position 1.
  • the position of the low-orbit satellite where the space-borne base station is located moves, and the space-borne base station enters service area 2.
  • the space-borne base station leaves service area 2 and enters service area 3.
  • the terminal when the terminal moves or the source satellite-borne base station of the service terminal moves with the source satellite, resulting in the need to switch the terminal to the next satellite, the terminal usually needs to report its Global Navigation Satellite System (Global Navigation Satellite System, GNSS ) information and the beam signal quality of other satellites obtained by its measurement, assisting the source space-borne base station to select the target space-borne base station, and then follow the switching process of the ground system.
  • Global Navigation Satellite System Global Navigation Satellite System, GNSS
  • Fig. 3 is a schematic diagram of a terminal covered discontinuously by the beam of the satellite.
  • the location of the terminal belongs to an uncovered area not covered by the beam of the satellite. This will cause the base station on the source satellite to be unable to handover the terminal to the next satellite, which will cause the terminal in the designated area to fail to switch to the cell and cause the service interruption of the terminal.
  • the embodiment of the present application provides an inter-satellite handover method, an on-board base station, a core network device, and a storage medium to solve the problem existing in the prior art that it is difficult to hand over a terminal to a suitable satellite access Technical problems in the area.
  • the method and the device are conceived based on the same application. Since the principle of solving problems of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the following will introduce from the side of the source on-board base station currently providing services for the terminal, the side of the target on-board base station to which the terminal will be handed over, and the side of the core network equipment.
  • an embodiment of the present application provides a method for inter-satellite handover, which is applied to a source satellite-borne base station.
  • the processing procedure of the method is as follows.
  • Step 401 Determine a target satellite for a terminal that needs to perform inter-satellite handover.
  • Step 402 Handover the terminal to the target satellite-borne base station on the target satellite.
  • step 401 Before performing step 401, it is generally necessary to determine whether the terminal needs to perform inter-satellite handover in the following manner:
  • the ephemeris information and the position-related information of the terminal it is determined whether to perform inter-satellite handover.
  • the satellite's position and operating speed are recorded in the ephemeris information, it is possible to determine the area where the satellite's beam is projected on the ground, combined with the terminal's position-related information (such as the current position of the satellite or the beam information of the current service terminal), it can be determined whether Inter-satellite handover needs to be performed for the terminal.
  • the terminal performs inter-satellite handover, which can be achieved in the following ways:
  • the ephemeris information and position-related information determine whether the current position of the terminal is located at the edge of the beam coverage area of the source satellite where the source satellite-borne base station is located, or the beam coverage area is about to disappear; wherein, the position-related information includes the current position, or the service terminal's beam information;
  • the area where the terminal is located is at the edge of the beam coverage area, or the beam coverage area is about to disappear, it is determined to perform inter-satellite handover.
  • the source spaceborne base station at position 1 determines that the terminal is located at the position according to the ephemeris information and the current position of the terminal, or the beam information of the serving terminal 1 satellite's beam coverage edge, it is determined that an inter-satellite handover is required at this time. On the contrary, there is no need to perform inter-satellite switching.
  • the base station on the source satellite determines that the beam coverage area of the source satellite is about to disappear, and an inter-satellite handover needs to be performed at this time.
  • the spaceborne base station after determining the need to perform inter-satellite handover, sends measurement configuration information to the terminal, and the terminal performs neighboring cell measurement according to the measurement configuration information, and returns a neighboring cell measurement report to the spaceborne base station. If the spaceborne base station determines that the neighboring cell If there is no neighbor cell signal in the measurement report, or there is a neighbor cell signal, but the strength of none of the neighbor cell signals reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal. If there is at least one neighbor cell signal When the signal strength reaches the set threshold, it is determined that there is a candidate satellite cell that can provide services for the terminal, and the terminal is handed over to the candidate satellite cell.
  • Determining the target satellite for the terminal that needs to perform inter-satellite handover can be achieved in the following ways:
  • the source satellite-borne base station determines the target satellite that can provide services for the terminal.
  • the satellite whose beam coverage in the ephemeris information includes the current position of the terminal or the beam coverage of the current serving terminal is used as the target satellite;
  • the source satellite-borne base station can determine the current beam coverage of each satellite according to the ephemeris information, and then according to the current position of the terminal or the coverage area of the beam of the current service terminal, which satellites will fall into the beam coverage or have fallen into The beam coverage of which satellites is used to determine the corresponding satellite as the target satellite.
  • the source satellite-borne base station can determine the current orbital position of each satellite according to the ephemeris information, and then use the satellite that reaches the designated orbital position as the target satellite, where the satellite can provide beam services for the terminal when it reaches the designated orbital position.
  • the Xn handover request carries the current position of the terminal or the beam information of the current serving terminal, and the beam information includes the wave position, and the tracking area TA or the source spaceborne base station according to the current position of the terminal.
  • the cell global identity CGI generated by the location map.
  • the target spaceborne base station adjusts the beam according to the current position of the terminal carried in the Xn handover request or the beam information of the current serving terminal, so that the adjusted beam covers the terminal, and returns the Xn handover confirmation information to the source spaceborne base station.
  • the satellite-borne base station notifies the terminal to perform Xn handover, so that the terminal is handed over to the target satellite-borne base station.
  • FIG. 5 is a first schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application.
  • Step 501 The source on-board base station determines that inter-planetary handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
  • Step 502 The source satellite-borne base station sends measurement configuration information to the terminal.
  • Step 503 The terminal returns a measurement report.
  • the foregoing measurement report may be a neighboring cell measurement report.
  • Step 504 According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
  • the source satellite-borne base station can determine whether there is no candidate target satellite cell that can provide services for the terminal according to whether the signal strength of the neighboring cell reaches the set threshold. If the strength of no adjacent cell signal reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal; if there is no adjacent cell measurement signal, it can also be determined that there is no candidate target satellite cell that can provide services for the terminal.
  • Step 505 The source satellite-borne base station uses the satellites in the ephemeris information that have reached the specified orbital position as the target satellites.
  • step 505 in the ephemeris information, the satellite whose beam coverage includes the current position of the terminal or the beam coverage of the current serving terminal may be determined as the target satellite.
  • Step 506 The source on-board base station sends an Xn handover request to the target on-board base station.
  • the source spaceborne base station initiates an Xn handover request to the target spaceborne base station through the Xn interface.
  • the handover request carries the current location of the terminal or the beam information of the current serving terminal.
  • the beam information includes the wave position, tracking area or source spaceborne base station The cell global identity CGI generated according to the current location map of the terminal.
  • Step 507 The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
  • the target spaceborne base station adjusts the beam of the target satellite where it is located, and projects a beam to the area covered by the beam corresponding to the current position or beam information, so that the beam of the target satellite covers the terminal.
  • Step 508 The target on-board base station returns an Xn handover confirmation to the source on-board base station.
  • Step 509 the terminal performs Xn handover.
  • Figure 6 is the second schematic diagram of the interaction of the terminal handover from the source spaceborne base station to the target spaceborne base station provided by the embodiment of the present application.
  • some beams of the target satellite may be closed by the satellite operation and control center. Therefore, when the target satellite is expected to provide beam coverage to the terminal, there may be situations where existing beam resources are not enough and there are unactivated beams. At this time, the target spaceborne base station needs to request the satellite operation and control center to increase beam resources.
  • Step 601 The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
  • Step 602 The source satellite-borne base station sends measurement configuration information to the terminal.
  • Step 603 The terminal returns a measurement report.
  • Step 604 According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
  • Step 605 The source satellite-borne base station takes the satellites in the ephemeris information that have reached the designated orbital position as the target satellites.
  • Step 606 The source on-board base station sends an Xn handover request to the target on-board base station.
  • Step 607 The source onboard base station sends a beam scheduling request to the satellite operation and control center.
  • the source on-board base station After receiving the Xn handover request, the source on-board base station determines that there is currently no beam resource to provide beam coverage to the terminal, so it sends a beam scheduling request to the satellite operation and control center, requesting scheduling of unused beam resources.
  • the above beam scheduling request carries the terminal's Location-related information.
  • Step 608 The satellite operation and control center adds beams for the target satellite according to the ephemeris information and the location-related information of the terminal.
  • the satellite operation and control center After receiving the beam call request sent by the source satellite-borne base station, the satellite operation and control center determines the added beam for the target satellite according to the ephemeris information and the position-related information of the terminal.
  • Step 609 The satellite operation and control center sends a beam resource scheduling instruction to the target on-board base station.
  • Step 610 The target satellite-borne base station returns a beam resource scheduling result feedback to the satellite operation and control center.
  • the target satellite-borne base station After receiving the above-mentioned beam resource scheduling instruction, the target satellite-borne base station executes the corresponding beam resource scheduling, and returns the beam resource scheduling result to the satellite operation control center after the scheduling is completed.
  • Step 611 The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
  • Step 612 The target on-board base station returns an Xn handover confirmation to the source on-board base station.
  • Step 613 The terminal performs Xn handover.
  • the second method the source satellite-borne base station determines the target satellite that can provide services for the terminal through the core network or the satellite control center, and realizes it in the following ways:
  • the way to determine the target satellite that can provide services for the terminal through the core network send the first N2 handover request to the core network, and the first N2 handover request is used to request the core network to determine the target satellite, wherein the first N2 handover request carries the terminal’s current
  • the position or the beam information of the current serving terminal includes the beam position, the tracking area TA or the cell global identity CGI generated by the source spaceborne base station according to the current position of the terminal.
  • Another way to determine the target satellite that can provide services for the terminal through the core network send the second N2 handover request to the core network, and the second N2 handover request is used to request the core network to determine the target, wherein the second N2 handover request does not carry Specific target cell information or the purpose of carrying the target access cell to be determined.
  • the satellite when the beam resources of the satellite are insufficient, the satellite can use the beam resources as needed by requesting the satellite operation and control center to increase the beam resources, thereby saving the beam resources of the satellite.
  • FIG. 7 is a third schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to the embodiment of the present application.
  • Step 701 The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
  • Step 702 The source satellite-borne base station sends measurement configuration information to the terminal.
  • Step 703 The terminal returns a measurement report.
  • the foregoing measurement report may be a neighboring cell measurement report.
  • Step 704 According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
  • the source satellite-borne base station can determine whether there is no alternative target satellite cell that can provide services for the terminal according to whether the signal strength of the neighboring cell reaches the set threshold. If the strength of no adjacent cell signal reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal; if there is no adjacent cell measurement signal, it can also be determined that there is no candidate target satellite cell that can provide services for the terminal.
  • Step 705 The source onboard base station sends an N2 handover request to the core network.
  • the above N2 handover request may be the first N2 handover request or the second N2 handover request. Both the first N2 handover request and the second N2 handover request are used to require the core network to determine the target satellite-borne base station for the terminal. The difference lies in the first N2 handover request and the second N2 handover request.
  • the N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal, or the beam information of the current serving terminal; while the second N2 handover request does not carry specific target cell information or carry information about the target access cell to be determined use.
  • Step 706 The core network determines the target satellite according to the ephemeris information and the location-related information of the terminal.
  • the core network needs to call the LCS service to locate the terminal and determine the location-related information of the terminal.
  • the core network determines the target satellite according to the N2 handover requirements and ephemeris information.
  • Step 707 The core network sends an N2 handover request to the target spaceborne base station.
  • the core network After the core network determines the target satellite, it sends an N2 handover request to the target satellite-borne base station on the target satellite, and the N2 handover request is used to request the target satellite to provide beam coverage services for the terminal.
  • the location-related information of the terminal is carried in the N2 handover request.
  • the target spaceborne base station When the target spaceborne base station determines that there is no beam resource available for scheduling after receiving the N2 handover request, it can schedule unused beam resources in the same way as the aforementioned steps 607-610.
  • Step 708 The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
  • the target satellite-borne base station allows the target satellite to adjust the beam according to the location-related information of the terminal, and provides beam coverage services to the terminal.
  • the target satellite cannot adjust the beam, it will return the message of rejecting the handover, and there is no need to perform steps 709 to 712 subsequently.
  • Step 709 The target onboard base station returns an N2 handover confirmation to the core network.
  • the target satellite-borne base station After the target satellite provides beam coverage to the terminal, the target satellite-borne base station returns an N2 handover confirmation to the core network.
  • Step 710 The core network sends a handover command to the source on-board base station.
  • the core network After receiving the N2 handover confirmation, the core network sends a handover command to the source onboard base station.
  • Step 711 The source satellite-borne base station forwards the switching command to the terminal.
  • Step 712 The terminal performs N2 handover.
  • the core network can determine multiple candidate spaceborne base stations according to the ephemeris and the terminal's position-related information, and then determine the target spaceborne base station by negotiating with these candidate spaceborne base stations.
  • FIG. 8 is a fourth schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application.
  • Step 801 The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
  • Step 802 The source satellite-borne base station sends measurement configuration information to the terminal.
  • Step 803 the terminal returns a measurement report.
  • the foregoing measurement report may be a neighboring cell measurement report.
  • Step 804 The source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal according to the measurement report.
  • Step 805 The source onboard base station sends an N2 handover request to the core network.
  • Step 806 The core network determines candidate satellites according to the ephemeris information and the location-related information of the terminal.
  • Step 807a The core network sends a beam negotiation request to the candidate spaceborne base station.
  • the core network sends a beam negotiation request to the candidate satellite-borne base station 1 on the candidate satellite 1 and the candidate space-borne base station 2 on the candidate satellite 2, respectively, and the beam negotiation request carries the position-related information of the terminal, which is used to send
  • the candidate spaceborne base station negotiates whether it can provide beam coverage for the terminal.
  • Step 807b The candidate satellite-borne base station returns beam negotiation feedback to the core network.
  • the core network determines that it can provide beam coverage for the terminal according to the beam negotiation feedback returned by the candidate spaceborne base station 1, and determines that it cannot provide beam coverage for the terminal according to the beam negotiation feedback returned by the candidate spaceborne base station 2. Therefore, the core network finally determines the candidate spaceborne base station 1 as the target spaceborne base station.
  • Step 808 The core network sends an N2 handover request to the candidate satellite-borne base station 1 .
  • the core network After the core network determines that the candidate satellite 1 is the target satellite, it sends an N2 handover request to the candidate satellite-borne base station 1, and the N2 handover request is used to request to provide beam coverage services for the terminal.
  • the location-related information of the terminal may not be carried in the N2 handover request.
  • Step 809 The candidate spaceborne base station 1 adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
  • the candidate satellite-borne base station 1 allows the candidate satellite 1 to adjust the beam according to the location-related information of the terminal, and provide beam coverage services to the terminal.
  • Step 810 The candidate satellite-borne base station 1 returns an N2 handover confirmation to the core network.
  • Step 811 The core network sends a handover command to the source on-board base station.
  • the core network After receiving the N2 handover confirmation, the core network sends a handover command to the source onboard base station.
  • Step 812 The source satellite-borne base station forwards the switching command to the terminal.
  • Step 813 the terminal performs N2 handover.
  • the target satellite-borne base station is determined by performing beam negotiation with multiple candidate satellite-borne base stations, which can avoid worrying about overloading and thus keep the service of the terminal stable.
  • the method of determining the target satellite that can provide services for the terminal through the satellite operation and control center sending the beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
  • FIG. 9 is a fifth schematic diagram of interaction of a terminal handover from a source on-board base station to a target on-board base station according to an embodiment of the present application.
  • Step 901 The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
  • Step 902 The source satellite-borne base station sends measurement configuration information to the terminal.
  • Step 903 the terminal returns a measurement report.
  • Step 904 According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
  • Step 905 The source onboard base station sends a beam scheduling request to the satellite operation and control center.
  • Step 906 The satellite operation and control center determines the target satellite according to the ephemeris information and the position-related information of the terminal.
  • Step 907 The satellite operation and control center sends beam scheduling instructions to the target satellite-borne base station.
  • the beam scheduling instruction carries position-related information of the terminal.
  • Step 908 The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
  • Step 909 The target satellite-borne base station returns the beam scheduling result to the satellite operation and control center.
  • Step 910 The satellite operation and control center sends beam scheduling feedback to the source onboard base station.
  • Step 911 The terminal performs Xn or N2 handover.
  • the target satellite that can provide services for the terminal after adjusting the beam is determined for the terminal that needs to perform inter-satellite handover, so that in the case of non-continuous coverage of the satellite beam, it is avoided that there is no suitable target satellite
  • the terminal is then handed over to the target satellite-borne base station on the target satellite to prevent the terminal's service from being interrupted.
  • the embodiment of the present application provides a method for inter-satellite handover, which is applied to the target on-board base station.
  • the method for the inter-satellite handover on the side of the target on-board base station please refer to the method implementation on the side of the source on-board base station.
  • the method includes:
  • Step 1001 Adjust the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
  • Step 1002 Return feedback information of completion of beam adjustment; wherein, the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  • the method before adjusting the beam according to the received position-related information of the terminal, the method further includes:
  • the N2 handover request carries the location-related information
  • the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  • a possible implementation manner after receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, further includes:
  • a beam scheduling request is sent to the satellite operation and control center; wherein the beam scheduling request is used to request to increase the target satellite carrier
  • the target satellite where the base station is located covers the beam of the terminal.
  • a possible implementation manner, before receiving the N2 handover request from the core network, further includes:
  • the embodiment of this application provides a method for inter-satellite handover, which is applied to core network equipment.
  • the method for inter-satellite handover on the core network equipment side please refer to the method embodiment part of the source satellite-borne base station side. The description of the method will not be repeated, please refer to Figure 11, the method includes:
  • Step 1101 Receive the first N2 handover request sent by the source spaceborne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or the beam serving the terminal information; or receive the second N2 handover request sent by the source spaceborne base station, and initiate the process of locating the terminal according to the second N2 handover request, and obtain the current location of the terminal; the second N2 handover request The purpose of not carrying the information of the target cell or carrying the target access cell to be determined;
  • Step 1102 Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
  • Step 1103 Send an N2 handover request to the target satellite-borne base station on the target satellite, the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to the Target satellite base station.
  • determining a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information includes:
  • a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  • a source satellite-borne base station provided in the embodiment of the present application includes:
  • the memory 1201 is used to store computer programs; the transceiver 1202 is used to send and receive data under the control of the processor 1203; the processor 1203 is used to read the computer programs in the memory 1201 and perform the following operations:
  • the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment
  • the processor 1203 is further configured to:
  • the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
  • the processor 1203 is further configured to:
  • the Xn handover request After determining the target satellite that can provide services for the terminal, send an Xn handover request to the on-board base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam currently serving the terminal Information, the beam information includes the wave position, the tracking area TA or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
  • the processor 1203 is further configured to:
  • the first N2 handover request is used to request the core network to determine the target satellite, where the first N2 handover request carries the current location information of the terminal or the current service
  • the beam information of the terminal where the beam information includes a beam position, a tracking area TA, or a cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
  • sending a second N2 handover request to the core network where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
  • the transceiver 1202 is configured to receive and send data under the control of the processor 1203 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1203 and various circuits of the memory represented by the memory 1201 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 1202 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 1203 is responsible for managing the bus architecture and general processing, and the memory 1201 can store data used by the processor 1203 when performing operations.
  • the processor 1203 can be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
  • CPU central processing device
  • ASIC Application Specific Integrated Circuit
  • FPGA field programmable gate array
  • CPLD Complex Programmable Logic Device
  • a target satellite-borne base station provided by the embodiment of the present application includes:
  • Memory 1301, transceiver 1302, processor 1303 are identical to Memory 1301, transceiver 1302, processor 1303:
  • the memory 1301 is used to store computer programs; the transceiver 1302 is used to send and receive data under the control of the processor 1303; the processor 1303 is used to read the computer programs in the memory 1301 and perform the following operations:
  • Adjusting the beam according to the received location-related information of the terminal wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
  • the feedback information is used to indicate that the source satellite-borne base station corresponding to the terminal notifies the terminal to switch to the target satellite-borne base station.
  • the processor 1303 is further configured to:
  • the terminal before adjusting the beam, receive an Xn handover request from the source satellite-borne base station; wherein, the Xn handover request carries the location-related information;
  • the N2 handover request carries the location-related information
  • the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  • the processor 1303 is further configured to:
  • the control center After receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, if it is determined according to the location-related information that there is currently no beam resource to provide beam coverage to the terminal, then send The control center sends a beam scheduling request; wherein, the beam scheduling request is used to request to add a beam covering the terminal in the target satellite where the target on-board base station is located.
  • the processor 1303 is further configured to:
  • the transceiver 1302 is used for receiving and sending data under the control of the processor 1303 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1303 and various circuits of the memory represented by the memory 1301 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 1302 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 1303 is responsible for managing the bus architecture and general processing, and the memory 1301 can store data used by the processor 1303 when performing operations.
  • the processor 1303 can be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
  • CPU central processing device
  • ASIC Application Specific Integrated Circuit
  • FPGA field programmable gate array
  • CPLD Complex Programmable Logic Device
  • a core network device provided in an embodiment of the present application includes:
  • the memory 1401 is used to store computer programs; the transceiver 1402 is used to send and receive data under the control of the processor 1403; the processor 1403 is used to read the computer programs in the memory 1401 and perform the following operations:
  • the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
  • the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal is handed over to the target on-board base station.
  • the processor 1403 is further configured to:
  • a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  • the transceiver 1402 is configured to receive and send data under the control of the processor 1403 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1403 and various circuits of the memory represented by the memory 1401 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 1402 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 1403 is responsible for managing the bus architecture and general processing, and the memory 1401 can store data used by the processor 1403 when performing operations.
  • the processor 1403 may be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
  • CPU central processing device
  • ASIC Application Specific Integrated Circuit
  • FPGA field programmable gate array
  • CPLD Complex Programmable Logic Device
  • an embodiment of the present application provides a source satellite-borne base station.
  • the source satellite-borne base station includes:
  • the determining unit 1501 is configured to determine a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
  • a switching unit 1502 configured to switch the terminal to a target on-board base station on the target satellite.
  • the determining unit 1501 is further configured to:
  • the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
  • the source satellite-borne base station further includes a sending unit 1503, and the sending unit 1503 is configured to:
  • the Xn handover request After determining the target satellite that can provide services for the terminal, send an Xn handover request to the on-board base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam currently serving the terminal Information, the beam information includes the wave position, the tracking area TA or the global cell identity generated by the source spaceborne base station according to the current location mapping of the terminal.
  • the determining unit 1501 is further configured to:
  • the first N2 handover request is used to request the core network to determine the target satellite, where the first N2 handover request carries the current location information of the terminal or the current service
  • the beam information of the terminal where the beam information includes a beam position, a tracking area TA, or a cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
  • sending a second N2 handover request to the core network where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
  • an embodiment of the present application provides a target satellite-borne base station.
  • the specific implementation of the method for the inter-satellite handover of the target satellite-borne base station can refer to the description of the method embodiment part of the target satellite-borne base station side, and repeat No more details here, please refer to Figure 16, the target satellite-borne base station includes:
  • the adjustment unit 1601 is configured to adjust the beam according to the received position-related information of the terminal; wherein, the adjusted beam covers the terminal, and the position-related information includes the current position of the terminal or a beam serving the terminal information;
  • the sending unit 1602 is configured to return feedback information for completing beam adjustment; wherein, the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  • the target spaceborne base station further includes a receiving unit 1603, and the receiving unit 1603 is configured to:
  • the terminal before adjusting the beam, receive an Xn handover request from the source satellite-borne base station; wherein, the Xn handover request carries the location-related information;
  • the N2 handover request carries the location-related information
  • the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  • the sending unit 1602 is further configured to:
  • the control center After receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, if it is determined according to the location-related information that there is currently no beam resource to provide beam coverage to the terminal, then send The control center sends a beam scheduling request; wherein, the beam scheduling request is used to request to add a beam covering the terminal in the target satellite where the target on-board base station is located.
  • the receiving unit 1603 is further configured to:
  • an embodiment of the present application provides a core network device.
  • the core network equipment includes:
  • the receiving unit 1701 is configured to receive the first N2 handover request sent by the source satellite-borne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or the Beam information of the terminal; or receiving a second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second The N2 handover request does not carry target cell information or carries the purpose of the target access cell to be determined;
  • a determining unit 1702 configured to determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
  • the sending unit 1703 is configured to send an N2 handover request to the target satellite-borne base station on the target satellite, and the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to the target satellite-borne base station.
  • the determining unit 1702 is further configured to:
  • a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.
  • the technical solution of the present application is essentially or part of the contribution to the prior art or all or 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 to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • an embodiment of the present application further provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above source The satellite-borne base station or the target satellite-borne base station or the inter-satellite handover method described in the core network.
  • the processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.
  • magnetic storage e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage e.g., CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented
  • the executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.

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Abstract

The present application discloses an inter-satellite handover method, a satellite-borne base station, a core network device, and a storage medium, for use in solving the technical problem in the prior art that it is difficult to hand over a terminal to a suitable satellite access cell. The method comprises: determining a target satellite for a terminal on which inter-satellite handover needs to be performed, wherein the target satellite is a satellite for providing beam coverage for the terminal; and handing over the terminal to a target satellite-borne base station on the target satellite.

Description

一种星间切换的方法、星载基站、核心网设备及存储介质A method for inter-satellite handover, an on-board base station, a core network device, and a storage medium
相关申请的交叉引用Cross References to Related Applications
本申请要求在2021年12月02日提交中国专利局、申请号为202111459754.X、申请名称为“一种星间切换的方法、星载基站、核心网及存储介质”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。This application claims the priority of the Chinese patent application submitted to the China Patent Office on December 02, 2021, with the application number 202111459754.X and the application name "A method for inter-satellite handover, satellite-borne base station, core network, and storage medium" rights, the entire contents of which are incorporated in this application by reference.
技术领域technical field
本申请涉及通信领域，尤其是涉及一种星间切换的方法、星载基站、核心网设备及存储介质。The present application relates to the communication field, and in particular to a method for inter-satellite handover, an on-board base station, core network equipment and a storage medium.
背景技术Background technique
在融合卫星通信的5G***中，由于成本原因，星载基站的数量有限，因此，星载基站所在卫星的对地业务波束需采用点波束为终端提供服务，且无法保证地球表面被业务波束全覆盖，即只能提供非连续覆盖。In the 5G system that integrates satellite communications, due to cost reasons, the number of space-borne base stations is limited. Therefore, the ground service beam of the satellite where the space-borne base station is located needs to use spot beams to provide services for terminals, and it cannot be guaranteed that the earth's surface is completely covered by service beams. Coverage, that is, only non-contiguous coverage can be provided.
由于星载基站所在卫星只能向终端提供非连续覆盖，因此在当前卫星移动后，且当前卫星的业务波束无法继续覆盖指定区域时，无法保证其它卫星会有业务波束继续覆盖指定区域。这将导致位于指定区域中的终端无法切换到合适的卫星接入小区，从而造成指定区域中的终端接入小区切换失败，并造成业务中断。Since the satellite where the on-board base station is located can only provide discontinuous coverage to the terminal, after the current satellite moves and the service beam of the current satellite cannot continue to cover the designated area, there is no guarantee that other satellites will continue to cover the designated area with service beams. This will cause the terminals located in the designated area to be unable to handover to a suitable satellite access cell, thus causing the handover failure of the terminal in the designated area to access the cell and causing service interruption.
鉴于此，如何将终端切换到合适的卫星接入小区，成为一个亟待解决的技术问题。In view of this, how to switch the terminal to a suitable satellite access cell has become an urgent technical problem to be solved.
发明内容Contents of the invention
本申请提供一种星间切换的方法、星载基站、核心网设备及存储介质，用以解决现有技术中存在的难以将终端切换到合适的卫星接入小区的技术问题。The present application provides an inter-satellite handover method, an on-board base station, core network equipment, and a storage medium to solve the technical problem existing in the prior art that it is difficult to handover a terminal to a suitable satellite access cell.
第一方面，为解决上述技术问题，本申请实施例提供的一种星间切换的方法，应用于源星载基站，该方法的技术方案如下：In the first aspect, in order to solve the above technical problems, a method for inter-satellite handover provided in the embodiment of the present application is applied to the source satellite-borne base station. The technical solution of the method is as follows:
为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星为通过调整波束后为所述终端提供波束覆盖的卫星；Determining a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
将所述终端切换到所述目标卫星上的目标星载基站。Handing over the terminal to the target on-board base station on the target satellite.
一种可能的实施方式，为需要执行星间切换的终端确定目标卫星，包括：A possible implementation manner, determining a target satellite for a terminal that needs to perform inter-satellite handover, includes:
将星历信息中波束覆盖范围包括所述终端的当前位置或者当前服务所述终端的波束的覆盖范围的卫星，作为所述目标卫星；taking the satellites whose beam coverage in the ephemeris information includes the current position of the terminal or the coverage of the beam currently serving the terminal as the target satellite;
或，将星历信息中到达指定轨道位置的卫星，作为所述目标卫星。Or, the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
一种可能的实施方式，为需要执行星间切换的终端确定目标卫星之后，还包括：A possible implementation manner, after determining the target satellite for the terminal that needs to perform inter-satellite handover, further includes:
向所述目标卫星上的星载基站发送Xn切换请求；其中，所述Xn切换请求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、与跟踪(Tracking Area，TA)区或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识(Cell Global Identifier，CGI)。Send an Xn handover request to the satellite-borne base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam information currently serving the terminal, and the beam information includes wave position, and tracking ( Tracking Area, TA) area or the cell global identifier (CGI) generated by the source satellite-borne base station according to the current location mapping of the terminal.
一种可能的实施方式，为需要执行星间切换的终端确定目标卫星，包括：A possible implementation manner, determining a target satellite for a terminal that needs to perform inter-satellite handover, includes:
向核心网发送第一N2切换要求，所述第一N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第一N2切换要求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA区或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。sending a first N2 handover request to the core network, where the first N2 handover request is used to request the core network to determine the target satellite, where the first N2 handover request carries the current location of the terminal or the current service location The beam information of the terminal includes the beam position, the tracking area TA area, or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
或，向所述核心网发送第二N2切换要求，所述第二N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途；Or, sending a second N2 handover request to the core network, where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
或，向卫星运控中心发送波束调度要求；其中，所述波束调度要求用于要求为所述终端确定所述目标卫星。Or, sending a beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
第二方面，本申请实施例提供了一种星间切换的方法，应用于目标星载基站，该方法包括：In the second aspect, the embodiment of the present application provides a method for inter-satellite handover, which is applied to a target on-board base station, and the method includes:
根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；Adjusting the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。Returning feedback information for completing the beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
一种可能的实施方式，根据接收到的终端的位置相关信息，调整波束之前，还包括：In a possible implementation manner, before adjusting the beam according to the received position-related information of the terminal, the method further includes:
从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；receiving an Xn handover request from the source satellite-borne base station; wherein the Xn handover request carries the position-related information;
或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from a satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
一种可能的实施方式，从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，还包括：A possible implementation manner, after receiving the Xn handover request from the source spaceborne base station, or after receiving the N2 handover request from the core network, further includes:
若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。If it is determined according to the position-related information that there is currently no beam resource to provide beam coverage to the terminal, a beam scheduling request is sent to the satellite operation and control center; wherein the beam scheduling request is used to request to increase the target satellite carrier The target satellite where the base station is located covers the beam of the terminal.
一种可能的实施方式，从核心网接收N2切换请求之前，还包括：A possible implementation manner, before receiving the N2 handover request from the core network, further includes:
接收所述核心网发送的波束协商请求；receiving a beam negotiation request sent by the core network;
根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
第三方面，本申请实施例提供了一种星间切换的方法，应用于核心网设备，该方法包括：In a third aspect, the embodiment of the present application provides a method for inter-satellite handover, which is applied to core network equipment, and the method includes:
接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；receiving the first N2 handover request sent by the source satellite-borne base station, where the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星通过调整波束为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。Sending an N2 handover request to the target on-board base station on the target satellite, the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal is handed over to the target on-board base station.
一种可能的实施方式，根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星，包括：In a possible implementation manner, determining a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information includes:
根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选卫星确定是否能为所述终端提供波束覆盖；sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
第四方面，本申请实施例还提供一种源星载基站，包括：In a fourth aspect, the embodiment of the present application also provides a source satellite-borne base station, including:
存储器，收发机，处理器：Memory, Transceiver, Processor:
存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行上述第一方面提供的方法的步骤。The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute the steps of the method provided by the first aspect above.
第五方面，本申请实施例提供了一种目标星载基站，包括：In the fifth aspect, the embodiment of the present application provides a target satellite-borne base station, including:
存储器，收发机，处理器：Memory, Transceiver, Processor:
存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收 发数据；处理器，用于读取所述存储器中的计算机程序并执行上述第二方面提供的方法的步骤。The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute the steps of the method provided by the second aspect above.
第六方面，本申请实施例提供了一种核心网设备，包括：In a sixth aspect, the embodiment of the present application provides a core network device, including:
存储器，收发机，处理器：Memory, Transceiver, Processor:
存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行上述第三方面提供的方法的步骤。The memory is used to store the computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and execute the steps of the method provided by the third aspect above.
第七方面，本申请实施例还提供一种源星载基站，包括：In the seventh aspect, the embodiment of the present application also provides a source satellite-borne base station, including:
确定单元，用于为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星为通过调整波束后为所述终端提供波束覆盖的卫星；The determination unit is configured to determine a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
切换单元，用于将所述终端切换到所述目标卫星上的目标星载基站。A switching unit, configured to switch the terminal to a target on-board base station on the target satellite.
第八方面，本申请实施例提供了一种目标星载基站，包括：In an eighth aspect, the embodiment of the present application provides a target satellite-borne base station, including:
调整单元，用于根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；An adjusting unit, configured to adjust the beam according to the received position-related information of the terminal; wherein, the adjusted beam covers the terminal, and the position-related information includes the current position of the terminal or beam information serving the terminal ;
发送单元，用于返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。The sending unit is configured to return feedback information for completing beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
第九方面，本申请实施例提供了一种核心网设备，包括：In a ninth aspect, the embodiment of the present application provides a core network device, including:
接收单元，用于接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；The receiving unit is configured to receive the first N2 handover request sent by the source satellite-borne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or serves the terminal beam information; or receive a second N2 handover request sent by the source spaceborne base station, and initiate a process of locating the terminal according to the second N2 handover request, and acquire the current location of the terminal; the second N2 The handover request does not carry the target cell information or carries the purpose of the target access cell to be determined;
确定单元，用于根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；a determining unit, configured to determine a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information;
发送单元，用于向所述目标卫星上的目标星载基站发送N2切换请求，所 述N2切换请求用于指示所述目标卫星通过调整波束为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。A sending unit, configured to send an N2 handover request to a target spaceborne base station on the target satellite, where the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to The target satellite-borne base station.
第十方面，本申请实施例还提供一种处理器可读存储介质，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行如第一方面或第二方面或第三方面所述的方法。In the tenth aspect, the embodiment of the present application further provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to the first aspect or the second aspect. The method described in the second aspect or the third aspect.
通过本申请实施例的上述一个或多个实施例中的技术方案，本申请实施例至少具有如下技术效果：Through the technical solutions in the above one or more embodiments of the embodiments of the present application, the embodiments of the present application have at least the following technical effects:
在本申请提供的实施例中，为需要执行星间切换的终端确定在调整波束后能为终端提供服务的目标卫星，从而在卫星的波束非连续覆盖的情况下，避免出现没有合适的目标卫星接入小区的情况，进而将终端切换到目标卫星上的目标星载基站，防止终端的业务中断。In the embodiment provided by this application, the target satellite that can provide services for the terminal after adjusting the beam is determined for the terminal that needs to perform inter-satellite handover, so that in the case of non-continuous coverage of the satellite beam, it is avoided that there is no suitable target satellite In the case of access to the cell, the terminal is then handed over to the target satellite-borne base station on the target satellite to prevent the terminal's service from being interrupted.
附图说明Description of drawings
图1为支持星载基站的5G架构示意图；Figure 1 is a schematic diagram of the 5G architecture supporting spaceborne base stations;
图2为星载基站相对核心网的服务区移动的示意图；FIG. 2 is a schematic diagram of the movement of the satellite-borne base station relative to the service area of the core network;
图3为卫星的波束非连续覆盖终端的示意图；FIG. 3 is a schematic diagram of a satellite beam non-continuous coverage terminal;
图4为本申请实施例提供的源星载基站侧的星间切换方法的流程图；FIG. 4 is a flow chart of the inter-satellite handover method on the source satellite-borne base station side provided by the embodiment of the present application;
图5为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图一；FIG. 5 is an interactive schematic diagram 1 of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
图6为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图二；FIG. 6 is a second schematic diagram of interaction of a terminal switching from a source on-board base station to a target on-board base station according to an embodiment of the present application;
图7为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图三；FIG. 7 is a third schematic diagram of interaction of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
图8为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图四；FIG. 8 is a fourth schematic diagram of interaction of a terminal switching from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application;
图9为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图五；FIG. 9 is a fifth schematic diagram of interaction of a terminal switching from a source on-board base station to a target on-board base station according to an embodiment of the present application;
图10为本申请实施例提供的目标星载基站侧的星间切换方法的流程图；FIG. 10 is a flow chart of an inter-satellite handover method on the target on-board base station side provided by an embodiment of the present application;
图11为本申请实施例提供的核心网设备侧的星间切换方法的流程图；FIG. 11 is a flow chart of the inter-satellite handover method on the core network device side provided by the embodiment of the present application;
图12为本申请实施例提供的一种源星载基站的结构示意图；FIG. 12 is a schematic structural diagram of a source satellite-borne base station provided by an embodiment of the present application;
图13为本申请实施例提供的一种目标星载基站的结构示意图；FIG. 13 is a schematic structural diagram of a target spaceborne base station provided by an embodiment of the present application;
图14为本申请实施例提供的一种核心网设备的结构示意图；FIG. 14 is a schematic structural diagram of a core network device provided by an embodiment of the present application;
图15为本申请实施例提供的另一种源星载基站的结构示意图；FIG. 15 is a schematic structural diagram of another source satellite-borne base station provided by the embodiment of the present application;
图16为本申请实施例提供的另一种目标星载基站的结构示意图；FIG. 16 is a schematic structural diagram of another target spaceborne base station provided by the embodiment of the present application;
图17为本申请实施例提供的另一种核心网设备的结构示意图。FIG. 17 is a schematic structural diagram of another core network device provided by an embodiment of the present application.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，并不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
本申请实施例提供的技术方案可以适用于多种***，尤其是5G***。例如适用的***可以是全球移动通讯(Global System of Mobile Communication，GSM)***、码分多址(Code Division Multiple Access，CDMA)***、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)通用分组无线业务(General Packet Radio Service，GPRS)***、长期演进(Long Term Evolution，LTE)***、LTE频分双工(Frequency Division Duplex，FDD)***、LTE时分双工(Time Division Duplex，TDD)***、高级长期演进(long term evolution advanced，LTE-A)***、通用移动***(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide interoperability for Microwave Access，WiMAX)***、5G新空口(New Radio,NR)***等。这多种***中均包括终端设备和网络设备。***中还可以包括核心网部分，例如演进的分组***(Evloved Packet System,EPS)、5G***(5GS)等。The technical solutions provided by the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable system can be Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet Wireless business (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Long term evolution advanced (LTE-A) system, Universal Mobile Telecommunications System (UMTS), Worldwide interoperability for Microwave Access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. These various systems include end devices and network devices. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.
本申请实施例涉及的终端设备，可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。在不同的***中，终端设备的名称可能也不相同，例如在5G***中，终端设备可以称为用户设备(User Equipment，UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端设备也可以称为***、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端设备(Remote Terminal)、接入终端设备(Access Terminal)、用户终端设备(User Terminal)、用户代理(User Agent)、用户装置(User Device)，本申请实施例中并不限定。The terminal device involved in this embodiment of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called User Equipment (User Equipment, UE). The wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phone, cordless phone, Session Initiated Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant, PDA) and other devices. Wireless terminal equipment can also be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (mobile), remote station (Remote Station), access point (Access Point) , Remote Terminal (Remote Terminal), Access Terminal (Access Terminal), User Terminal (User Terminal), User Agent (User Agent), and User Device (User Device), which are not limited in the embodiments of this application.
本申请实施例涉及的网络设备，可以是基站，当基站设置在卫星上时被称之为星载基站，该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同，基站又可以称为接入点，或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备，或者其它名称。网络设备可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互更换，作为无线终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如，本申请实施例涉及的网络设备可以是全球移动通信***(Global System for Mobile communications，GSM)或码分多址接入(Code Division Multiple Access，CDMA)中的网络设备(Base Transceiver Station，BTS)，也可以是带宽码分多址接入(Wide-band Code Division Multiple Access，WCDMA)中 的网络设备(NodeB)，还可以是长期演进(Long Term Evolution，LTE)***中的演进型网络设备(Evolutional Node B，eNB或e-NodeB)、5G网络架构(Next Generation System)中的5G基站(gNB)，也可以是家庭演进基站(Home evolved Node B，HeNB)、中继节点(Relay Node)、家庭基站(femto)、微微基站(pico)等，本申请实施例中并不限定。在一些网络结构中，网络设备可以包括集中单元(Centralized Unit，CU)节点和分布单元(Distributed Unit，DU)节点，集中单元和分布单元也可以地理上分开布置。The network equipment involved in this embodiment of the present application may be a base station. When a base station is installed on a satellite, it is called a satellite-borne base station. The base station may include multiple cells that provide services for terminals. Depending on the specific application, the base station can also be called an access point, or it can be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network. Network devices may also coordinate attribute management for the air interface. For example, the network equipment involved in the embodiment of the present application may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a Long Term Evolution (LTE) system (Evolutional Node B, eNB or e-NodeB), the 5G base station (gNB) in the 5G network architecture (Next Generation System), can also be the home evolution base station (Home evolved Node B, HeNB), relay node (Relay Node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present application. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, and the Centralized Unit and the Distributed Unit may also be arranged geographically separately.
请参见图1为支持星载基站的5G架构示意图。Please refer to Figure 1 for a schematic diagram of the 5G architecture supporting spaceborne base stations.
当部署在卫星上的星载基站接入地面5G***时，星载基站需支持N1/N2/N3接口，这些接口需承载在卫星无线链路(馈电链路)上，星载基站与终端通信使用NR Uu接口，星载基站通过NG接口与信关站通信，信关站通过NG接口(支持N1/N2/N3)与5G核心网通信，5G核心网通过N6接口与数据网络通信。When the space-borne base station deployed on the satellite is connected to the ground 5G system, the space-borne base station needs to support N1/N2/N3 interfaces, and these interfaces need to be carried on the satellite wireless link (feeder link), and the space-borne base station and the terminal The communication uses the NR Uu interface. The spaceborne base station communicates with the gateway station through the NG interface. The gateway station communicates with the 5G core network through the NG interface (supporting N1/N2/N3), and the 5G core network communicates with the data network through the N6 interface.
请参见图2为星载基站相对核心网的服务区移动的示意图。Please refer to FIG. 2 , which is a schematic diagram of the movement of the spaceborne base station relative to the service area of the core network.
由于低轨卫星的移动性，星载基站会周期性进入和离开某地面5G核心网的服务区，如在图2中星载基站在位置1进行入地面5G核心网的服务区1，随着星载基站所在低轨卫星的位置移动，星载基站进入服务区2，在低轨卫星到达位置2时星载基站离开服务区2，并进入服务区3。Due to the mobility of low-orbit satellites, the spaceborne base station will periodically enter and leave the service area of a terrestrial 5G core network. For example, in Figure 2, the spaceborne base station enters the service area 1 of the ground 5G core network at position 1. The position of the low-orbit satellite where the space-borne base station is located moves, and the space-borne base station enters service area 2. When the low-orbit satellite arrives at position 2, the space-borne base station leaves service area 2 and enters service area 3.
现有技术中，当终端移动或者服务终端的源星载基站随所在源卫星移动，导致需要将终端切换到下一颗卫星时，通常需要终端上报其全球导航卫星***(Global Navigation Satellite System，GNSS)信息以及其测量获得的其它卫星的波束信号质量，辅助源星载基站选择目标星载基站，后续按照地面***的切换流程执行。In the prior art, when the terminal moves or the source satellite-borne base station of the service terminal moves with the source satellite, resulting in the need to switch the terminal to the next satellite, the terminal usually needs to report its Global Navigation Satellite System (Global Navigation Satellite System, GNSS ) information and the beam signal quality of other satellites obtained by its measurement, assisting the source space-borne base station to select the target space-borne base station, and then follow the switching process of the ground system.
然而，由于卫星的波束采用点波束为终端提供服务时，无法保证地球表面被卫星波束全覆盖，因此在源卫星移动后无法继续照射指定区域时，无法保证轨道上的下一颗卫星会有波束照射该指定区域，请参见图3为卫星的波束非连续覆盖终端的示意图，图3中终端所在的位置属于未被卫星的波束覆 盖的未覆盖区。这将导致源星载基站无法将终端切换到下一颗卫星，从而造成指定区域中的终端接入小区切换失败，并造成终端的业务中断。However, since the beam of the satellite uses a spot beam to provide services for the terminal, there is no guarantee that the earth's surface will be fully covered by the satellite beam. Therefore, when the source satellite cannot continue to illuminate the designated area after the source satellite moves, there is no guarantee that the next satellite on the orbit will have a beam. For irradiating the specified area, please refer to Fig. 3, which is a schematic diagram of a terminal covered discontinuously by the beam of the satellite. In Fig. 3, the location of the terminal belongs to an uncovered area not covered by the beam of the satellite. This will cause the base station on the source satellite to be unable to handover the terminal to the next satellite, which will cause the terminal in the designated area to fail to switch to the cell and cause the service interruption of the terminal.
为了解决上述技术问题，本申请实施例提供了一种星间切换的方法、星载基站、核心网设备及存储介质，用以解决现有技术中存在的难以将终端切换到合适的卫星接入小区的技术问题。In order to solve the above technical problems, the embodiment of the present application provides an inter-satellite handover method, an on-board base station, a core network device, and a storage medium to solve the problem existing in the prior art that it is difficult to hand over a terminal to a suitable satellite access Technical problems in the area.
其中，方法和装置是基于同一申请构思的，由于方法和装置解决问题的原理相似，因此装置和方法的实施可以相互参见，重复之处不再赘述。Among them, the method and the device are conceived based on the same application. Since the principle of solving problems of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
以下将分别从当前为终端提供服务的源星载基站侧、终端将切换到的目标星载基站侧以及核心网设备侧进行介绍。The following will introduce from the side of the source on-board base station currently providing services for the terminal, the side of the target on-board base station to which the terminal will be handed over, and the side of the core network equipment.
请参考图4，本申请实施例提供一种星间切换的方法，应用于源星载基站，该方法的处理过程如下。Referring to FIG. 4 , an embodiment of the present application provides a method for inter-satellite handover, which is applied to a source satellite-borne base station. The processing procedure of the method is as follows.
步骤401：为需要执行星间切换的终端确定目标卫星。Step 401: Determine a target satellite for a terminal that needs to perform inter-satellite handover.
步骤402：将终端切换到目标卫星上的目标星载基站。Step 402: Handover the terminal to the target satellite-borne base station on the target satellite.
在执行步骤401之前，通常还需要采用下列方式确定终端是否需要执行星间切换：Before performing step 401, it is generally necessary to determine whether the terminal needs to perform inter-satellite handover in the following manner:
根据星历信息和终端的位置相关信息，确定是否执行星间切换。According to the ephemeris information and the position-related information of the terminal, it is determined whether to perform inter-satellite handover.
由于星历信息中记录了卫星的位置及运行速度，因此可以确定卫星的波束投射在地面的区域，结合终端的位置相关信息(如卫星的当前位置或当前服务终端的波束信息)，可以确定是否需要为终端执行星间切换。Since the satellite's position and operating speed are recorded in the ephemeris information, it is possible to determine the area where the satellite's beam is projected on the ground, combined with the terminal's position-related information (such as the current position of the satellite or the beam information of the current service terminal), it can be determined whether Inter-satellite handover needs to be performed for the terminal.
根据星历信息和终端的位置相关信息，确定终端是否执行星间切换，可以通过下列方式实现：According to the ephemeris information and the location-related information of the terminal, it is determined whether the terminal performs inter-satellite handover, which can be achieved in the following ways:
根据星历信息和位置相关信息，确定终端的当前位置是否位于源星载基站所在源卫星的波束覆盖区域的边缘，或波束覆盖区域即将消失；其中，位置相关信息包括当前位置，或服务终端的波束信息；According to the ephemeris information and position-related information, determine whether the current position of the terminal is located at the edge of the beam coverage area of the source satellite where the source satellite-borne base station is located, or the beam coverage area is about to disappear; wherein, the position-related information includes the current position, or the service terminal's beam information;
若终端所在区域位于波束覆盖区域的边缘，或波束覆盖区域即将消失，则确定执行星间切换。If the area where the terminal is located is at the edge of the beam coverage area, or the beam coverage area is about to disappear, it is determined to perform inter-satellite handover.
例如，假设图2所示的两个星载基站视为不同的星载基站，位于位置1 的源星载基站根据星历信息及终端的当前位置，或服务终端的波束信息，确定终端位于位置1的卫星的波束覆盖边缘，此时确定需要执行星间切换。反之，则不需要执行星间切换。For example, assuming that the two spaceborne base stations shown in Figure 2 are regarded as different spaceborne base stations, the source spaceborne base station at position 1 determines that the terminal is located at the position according to the ephemeris information and the current position of the terminal, or the beam information of the serving terminal 1 satellite's beam coverage edge, it is determined that an inter-satellite handover is required at this time. On the contrary, there is no need to perform inter-satellite switching.
又如，若图2中位置1的源卫星出现故障或收到指令需要停止提供波束服务时，源星载基站确定源卫星的波束覆盖区域即将消失，此时需要执行星间切换。For another example, if the source satellite at position 1 in Figure 2 fails or receives an instruction to stop providing beam services, the base station on the source satellite determines that the beam coverage area of the source satellite is about to disappear, and an inter-satellite handover needs to be performed at this time.
在确定终端需要执行星间切换后，还需进一步确定是否有能为终端提供服务的备选卫星接入小区，可以通过下列方式实现：After determining that the terminal needs to perform inter-satellite handover, it is necessary to further determine whether there is an alternative satellite access cell that can provide services for the terminal, which can be achieved in the following ways:
若终端的邻区测量报告中没有邻小区信号或者没有一个邻小区信号的强度达到设定阈值，则确定没有能为终端提供服务的备选目标卫星小区。If there is no adjacent cell signal in the adjacent cell measurement report of the terminal or the strength of none of the adjacent cell signals reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal.
例如，在确定需要执行星间切换后，星载基站向终端发送测量配置信息，终端根据该测量配置信息进行邻区测量，并返回邻区测量报告给星载基站，星载基站若确定邻区测量报告中没有邻小区信号，或有邻小区信号，但没有一个邻小区信号的强度达到设定阈值，则确定没有能为终端提供服务的备选目标卫星小区，若至少有一个邻小区信号的信号强度达到设定阈值，则确定有能为终端提供服务的备选卫星小区，将终端切换到该备选卫星小区。For example, after determining the need to perform inter-satellite handover, the spaceborne base station sends measurement configuration information to the terminal, and the terminal performs neighboring cell measurement according to the measurement configuration information, and returns a neighboring cell measurement report to the spaceborne base station. If the spaceborne base station determines that the neighboring cell If there is no neighbor cell signal in the measurement report, or there is a neighbor cell signal, but the strength of none of the neighbor cell signals reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal. If there is at least one neighbor cell signal When the signal strength reaches the set threshold, it is determined that there is a candidate satellite cell that can provide services for the terminal, and the terminal is handed over to the candidate satellite cell.
为需要执行星间切换的终端确定目标卫星，可以通过下列几种方式实现：Determining the target satellite for the terminal that needs to perform inter-satellite handover can be achieved in the following ways:
第一种方式，由源星载基站确定能为终端提供服务的目标卫星。In the first way, the source satellite-borne base station determines the target satellite that can provide services for the terminal.
将星历信息中波束覆盖范围包括终端的当前位置或者当前服务终端的波束的覆盖范围的卫星，作为目标卫星；The satellite whose beam coverage in the ephemeris information includes the current position of the terminal or the beam coverage of the current serving terminal is used as the target satellite;
或，将星历信息中到达指定轨道位置的卫星，作为目标卫星。Or, take the satellite that reaches the specified orbital position in the ephemeris information as the target satellite.
例如，源星载基站根据星历信息可以确定各个卫星当前的波束覆盖范围，进而可以根据终端的当前位置或当前服务终端的波束的覆盖区域，即将落入哪些卫星的波束覆盖范围或已落入哪些卫星的波束覆盖范围，将对应的卫星确定为目标卫星。For example, the source satellite-borne base station can determine the current beam coverage of each satellite according to the ephemeris information, and then according to the current position of the terminal or the coverage area of the beam of the current service terminal, which satellites will fall into the beam coverage or have fallen into The beam coverage of which satellites is used to determine the corresponding satellite as the target satellite.
又如，源星载基站根据星历信息可以确定各个卫星当前的轨道位置，进而将到达指定轨道位置的卫星作为目标卫星，其中，卫星在到达指定轨道位 置可以为终端提供波束服务。For another example, the source satellite-borne base station can determine the current orbital position of each satellite according to the ephemeris information, and then use the satellite that reaches the designated orbital position as the target satellite, where the satellite can provide beam services for the terminal when it reaches the designated orbital position.
一种可能的实施方式，为需要执行星间切换的终端确定目标卫星之后，还需要向目标卫星发起切换请求，可以通过下列方式实现：In a possible implementation, after determining the target satellite for the terminal that needs to perform inter-satellite handover, it is also necessary to initiate a handover request to the target satellite, which can be achieved in the following ways:
向目标卫星上的星载基站发送Xn切换请求；其中，Xn切换请求携带终端的当前位置或者当前服务终端的波束信息，波束信息包括波位、与跟踪区TA或源星载基站根据终端的当前位置映射生成的小区全球标识CGI。目标星载基站根据Xn切换请求中的携带的终端的当前位置或当前服务终端的波束信息，调整波束，使调整方向后的波束覆盖终端，并返回Xn切换确认的信息给源星载基站，源星载基站通知终端执行Xn切换，使终端切换到目标星载基站。Send an Xn handover request to the spaceborne base station on the target satellite; where, the Xn handover request carries the current position of the terminal or the beam information of the current serving terminal, and the beam information includes the wave position, and the tracking area TA or the source spaceborne base station according to the current position of the terminal. The cell global identity CGI generated by the location map. The target spaceborne base station adjusts the beam according to the current position of the terminal carried in the Xn handover request or the beam information of the current serving terminal, so that the adjusted beam covers the terminal, and returns the Xn handover confirmation information to the source spaceborne base station. The satellite-borne base station notifies the terminal to perform Xn handover, so that the terminal is handed over to the target satellite-borne base station.
为了使Xn切换请求能携带终端的位置相关信息，在Xn切换请求中新增对应的元信息，如表1中粗体字所示。In order to enable the Xn handover request to carry the location-related information of the terminal, corresponding meta information is added in the Xn handover request, as shown in bold in Table 1.
表1Table 1
Figure PCTCN2022136179-appb-000001
Figure PCTCN2022136179-appb-000001
请参见图5为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图一。Please refer to FIG. 5 , which is a first schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application.
步骤501：源星载基站根据星历信息和终端的位置相关信息，确定需要执 行星间切换。Step 501: The source on-board base station determines that inter-planetary handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
步骤502：源星载基站向终端发送测量配置信息。Step 502: The source satellite-borne base station sends measurement configuration information to the terminal.
步骤503：终端返回测量报告。Step 503: The terminal returns a measurement report.
上述测量报告可以为邻区测量报告。The foregoing measurement report may be a neighboring cell measurement report.
步骤504：源星载基站根据测量报告，确定没有能为终端提供服务的备选目标卫星小区。Step 504: According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
源星载基站可以根据邻区信号的强度是否达到设定阈值，确定是否没有能为终端提供服务的备选目标卫星小区。若无邻区信号的强度达到设定阈值，则确定没有能为终端提供服务的备选目标卫星小区；若没有邻区测量信号，同样可以确定没有能为终端提供服务的备选目标卫星小区。The source satellite-borne base station can determine whether there is no candidate target satellite cell that can provide services for the terminal according to whether the signal strength of the neighboring cell reaches the set threshold. If the strength of no adjacent cell signal reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal; if there is no adjacent cell measurement signal, it can also be determined that there is no candidate target satellite cell that can provide services for the terminal.
步骤505：源星载基站将星历信息中到达指定轨道位置的卫星，作为目标卫星。Step 505: The source satellite-borne base station uses the satellites in the ephemeris information that have reached the specified orbital position as the target satellites.
在步骤505中，也可以是将星历信息中，波束覆盖范围包括终端的当前位置，或当前服务终端的波束的覆盖范围的卫星，确定为目标卫星。In step 505, in the ephemeris information, the satellite whose beam coverage includes the current position of the terminal or the beam coverage of the current serving terminal may be determined as the target satellite.
步骤506：源星载基站向目标星载基站发送Xn切换请求。Step 506: The source on-board base station sends an Xn handover request to the target on-board base station.
源星载基站通过Xn接口向目标星载基站发起Xn切换请求，该切换请求中携带了终端的当前位置，或当前服务终端的波束信息，该波束信息包括波位、跟踪区或源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。The source spaceborne base station initiates an Xn handover request to the target spaceborne base station through the Xn interface. The handover request carries the current location of the terminal or the beam information of the current serving terminal. The beam information includes the wave position, tracking area or source spaceborne base station The cell global identity CGI generated according to the current location map of the terminal.
步骤507：目标星载基站根据终端的位置相关信息调整波束，向终端提供波束覆盖。Step 507: The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
目标星载基站，根据Xn切换请求中携带的当前位置或波束信息，调整其所在目标卫星的波束，向当前位置或波束信息对应波束覆盖的区域投射波束，使目标卫星的波束覆盖终端。The target spaceborne base station, according to the current position or beam information carried in the Xn handover request, adjusts the beam of the target satellite where it is located, and projects a beam to the area covered by the beam corresponding to the current position or beam information, so that the beam of the target satellite covers the terminal.
步骤508：目标星载基站向源星载基站返回Xn切换确认。Step 508: The target on-board base station returns an Xn handover confirmation to the source on-board base station.
步骤509：终端执行Xn切换。Step 509: the terminal performs Xn handover.
请参见图6为本申请实施例提供的终端从源星载基站切换到目标星载基 站的交互示意图二。Please refer to Figure 6, which is the second schematic diagram of the interaction of the terminal handover from the source spaceborne base station to the target spaceborne base station provided by the embodiment of the present application.
在卫星通信中，为了节省星上资源或避免卫星的波束间干扰，目标卫星的部分波束可能被卫星运控中心关闭。因此当希望目标卫星向终端提供波束覆盖时，可能会出现已有波束资源不够用，而还有未启用的波束的情况。此时目标星载基站需要请求卫星运控中心增加波束资源。In satellite communication, in order to save on-board resources or avoid inter-beam interference of satellites, some beams of the target satellite may be closed by the satellite operation and control center. Therefore, when the target satellite is expected to provide beam coverage to the terminal, there may be situations where existing beam resources are not enough and there are unactivated beams. At this time, the target spaceborne base station needs to request the satellite operation and control center to increase beam resources.
步骤601：源星载基站根据星历信息和终端的位置相关信息，确定需要执行星间切换。Step 601: The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
步骤602：源星载基站向终端发送测量配置信息。Step 602: The source satellite-borne base station sends measurement configuration information to the terminal.
步骤603：终端返回测量报告。Step 603: The terminal returns a measurement report.
步骤604：源星载基站根据测量报告，确定没有能为终端提供服务的备选目标卫星小区。Step 604: According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
步骤605：源星载基站将星历信息中到达指定轨道位置的卫星，作为目标卫星。Step 605: The source satellite-borne base station takes the satellites in the ephemeris information that have reached the designated orbital position as the target satellites.
步骤606：源星载基站向目标星载基站发送Xn切换请求。Step 606: The source on-board base station sends an Xn handover request to the target on-board base station.
步骤607：源星载基站向卫星运控中心发送波束调度请求。Step 607: The source onboard base station sends a beam scheduling request to the satellite operation and control center.
源星载基站在接收到Xn切换请求后，确定目前没有波束资源向终端提供波束覆盖，于是向卫星运控中心发送波束调度请求，请求调度未使用的波束资源，上述波束调度请求中携带终端的位置相关信息。After receiving the Xn handover request, the source on-board base station determines that there is currently no beam resource to provide beam coverage to the terminal, so it sends a beam scheduling request to the satellite operation and control center, requesting scheduling of unused beam resources. The above beam scheduling request carries the terminal's Location-related information.
步骤608：卫星运控中心根据星历信息及终端的位置相关信息，为目标卫星增加的波束。Step 608: The satellite operation and control center adds beams for the target satellite according to the ephemeris information and the location-related information of the terminal.
卫星运控中心在接收到源星载基站发送的波束调取请求后，根据星历信息和终端的位置相关信息，确定为目标卫星增加的波束。After receiving the beam call request sent by the source satellite-borne base station, the satellite operation and control center determines the added beam for the target satellite according to the ephemeris information and the position-related information of the terminal.
步骤609：卫星运控中心向目标星载基站发送波束资源调度指令。Step 609: The satellite operation and control center sends a beam resource scheduling instruction to the target on-board base station.
步骤610：目标星载基站向卫星运控中心返回波束资源调度结果反馈。Step 610: The target satellite-borne base station returns a beam resource scheduling result feedback to the satellite operation and control center.
目标星载基站接收到上述波束资源调度指令后，执行相应的波束资源的调度，并在完成调度后，返回波束资源调度结果反馈给卫星运行控制中心。After receiving the above-mentioned beam resource scheduling instruction, the target satellite-borne base station executes the corresponding beam resource scheduling, and returns the beam resource scheduling result to the satellite operation control center after the scheduling is completed.
步骤611：目标星载基站根据终端的位置相关信息调整波束，向终端提供 波束覆盖。Step 611: The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
步骤612：目标星载基站向源星载基站返回Xn切换确认。Step 612: The target on-board base station returns an Xn handover confirmation to the source on-board base station.
步骤613：终端执行Xn切换。Step 613: The terminal performs Xn handover.
第二种方式：源星载基站通过核心网或卫星控制中心确定能为终端提供服务的目标卫星，通过下列方式实现：The second method: the source satellite-borne base station determines the target satellite that can provide services for the terminal through the core network or the satellite control center, and realizes it in the following ways:
通过核心网确定能为终端提供服务的目标卫星的方式：向核心网发送第一N2切换要求，第一N2切换要求用于要求核心网确定目标卫星，其中，第一N2切换要求携带终端的当前位置或者当前服务终端的波束信息，波束信息包括波位、跟踪区TA或源星载基站根据终端的当前位置映射生成的小区全球标识CGI。The way to determine the target satellite that can provide services for the terminal through the core network: send the first N2 handover request to the core network, and the first N2 handover request is used to request the core network to determine the target satellite, wherein the first N2 handover request carries the terminal’s current The position or the beam information of the current serving terminal. The beam information includes the beam position, the tracking area TA or the cell global identity CGI generated by the source spaceborne base station according to the current position of the terminal.
通过核心网确定能为终端提供服务的目标卫星的另一种方式：向核心网发送第二N2切换要求，第二N2切换要求用于要求核心网确定目标，其中，第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途。Another way to determine the target satellite that can provide services for the terminal through the core network: send the second N2 handover request to the core network, and the second N2 handover request is used to request the core network to determine the target, wherein the second N2 handover request does not carry Specific target cell information or the purpose of carrying the target access cell to be determined.
在本申请提供的实施例中，在卫星的波束资源不足时，通过向卫星运控中心请求增加波束资源的方式，能使卫星按需使用波束资源，从而节约卫星的波束资源。In the embodiment provided in this application, when the beam resources of the satellite are insufficient, the satellite can use the beam resources as needed by requesting the satellite operation and control center to increase the beam resources, thereby saving the beam resources of the satellite.
例如，请参见图7为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图三。For example, please refer to FIG. 7 , which is a third schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to the embodiment of the present application.
步骤701：源星载基站根据星历信息和终端的位置相关信息，确定需要执行星间切换。Step 701: The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
步骤702：源星载基站向终端发送测量配置信息。Step 702: The source satellite-borne base station sends measurement configuration information to the terminal.
步骤703：终端返回测量报告。Step 703: The terminal returns a measurement report.
上述测量报告可以为邻区测量报告。The foregoing measurement report may be a neighboring cell measurement report.
步骤704：源星载基站根据测量报告，确定没有能为终端提供服务的备选目标卫星小区。Step 704: According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
源星载基站可以根据邻区信号的强度是否达到设定阈值，确定是否没有 能为终端提供服务的备选目标卫星小区。若无邻区信号的强度达到设定阈值，则确定没有能为终端提供服务的备选目标卫星小区；若没有邻区测量信号，同样可以确定没有能为终端提供服务的备选目标卫星小区。The source satellite-borne base station can determine whether there is no alternative target satellite cell that can provide services for the terminal according to whether the signal strength of the neighboring cell reaches the set threshold. If the strength of no adjacent cell signal reaches the set threshold, it is determined that there is no candidate target satellite cell that can provide services for the terminal; if there is no adjacent cell measurement signal, it can also be determined that there is no candidate target satellite cell that can provide services for the terminal.
步骤705：源星载基站向核心网发送N2切换要求。Step 705: The source onboard base station sends an N2 handover request to the core network.
上述N2切换要求可以是第一N2切换要求，也可以是第二N2切换要求，第一N2切换要求和第二N2切换要求均用于要求核心网为终端确定目标星载基站，不同在于第一N2切换要求中携带终端的位置相关信息，位置相关信息包括终端的当前位置，或当前服务终端的波束信息；而第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途。The above N2 handover request may be the first N2 handover request or the second N2 handover request. Both the first N2 handover request and the second N2 handover request are used to require the core network to determine the target satellite-borne base station for the terminal. The difference lies in the first N2 handover request and the second N2 handover request. The N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal, or the beam information of the current serving terminal; while the second N2 handover request does not carry specific target cell information or carry information about the target access cell to be determined use.
步骤706：核心网根据星历信息和终端的位置相关信息，确定目标卫星。Step 706: The core network determines the target satellite according to the ephemeris information and the location-related information of the terminal.
当N2切换要求为第二N2切换要求时，由于第二N2切换要求中未携带终端的位置相关信息，因此核心网需要调用LCS服务来定位终端，确定终端的位置相关信息。When the N2 handover request is the second N2 handover request, since the second N2 handover request does not carry the location-related information of the terminal, the core network needs to call the LCS service to locate the terminal and determine the location-related information of the terminal.
核心网根据N2切换要求及星历信息，确定目标卫星。The core network determines the target satellite according to the N2 handover requirements and ephemeris information.
步骤707：核心网向目标星载基站发送N2切换请求。Step 707: The core network sends an N2 handover request to the target spaceborne base station.
在核心网确定目标卫星后，向目标卫星上的目标星载基站发送N2切换请求，N2切换请求用于请求目标卫星为终端提供波束覆盖服务。在N2切换请求中携带了终端的位置相关信息。After the core network determines the target satellite, it sends an N2 handover request to the target satellite-borne base station on the target satellite, and the N2 handover request is used to request the target satellite to provide beam coverage services for the terminal. The location-related information of the terminal is carried in the N2 handover request.
当目标星载基站在接收到N2切换请求后，确定目前没有波束资源可供调度，则可以采用与前述步骤607-步骤610相同的方式，调度未使用的波束资源。When the target spaceborne base station determines that there is no beam resource available for scheduling after receiving the N2 handover request, it can schedule unused beam resources in the same way as the aforementioned steps 607-610.
为了在N2切换请求中携带终端的位置相关信息，在N2切换请求中增加了对应的元信息进行指示，如表2中粗体字所示：In order to carry the location-related information of the terminal in the N2 handover request, the corresponding meta-information is added to the N2 handover request for indication, as shown in bold in Table 2:
表2Table 2
Figure PCTCN2022136179-appb-000002
Figure PCTCN2022136179-appb-000002
Figure PCTCN2022136179-appb-000003
Figure PCTCN2022136179-appb-000003
步骤708：目标星载基站根据终端的位置相关信息调整波束，向终端提供波束覆盖。Step 708: The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
目标星载基站根据终端的位置相关信息，让目标卫星调整波束，向终端提供波束覆盖服务。The target satellite-borne base station allows the target satellite to adjust the beam according to the location-related information of the terminal, and provides beam coverage services to the terminal.
若目标卫星无法调整波束，则返回拒绝切换的信息，后续也就不需要执行步骤709-步骤712。If the target satellite cannot adjust the beam, it will return the message of rejecting the handover, and there is no need to perform steps 709 to 712 subsequently.
步骤709：目标星载基站向核心网返回N2切换确认。Step 709: The target onboard base station returns an N2 handover confirmation to the core network.
目标星载基站在目标卫星向终端提供波束覆盖后，向核心网返回N2切换确认。After the target satellite provides beam coverage to the terminal, the target satellite-borne base station returns an N2 handover confirmation to the core network.
步骤710：核心网向源星载基站发送切换命令。Step 710: The core network sends a handover command to the source on-board base station.
核心网在接收到N2切换确认后，向源星载基站发送切换命令。After receiving the N2 handover confirmation, the core network sends a handover command to the source onboard base station.
步骤711：源星载基站向终端转发切换命令。Step 711: The source satellite-borne base station forwards the switching command to the terminal.
步骤712：终端执行N2切换。Step 712: The terminal performs N2 handover.
为了应对终端难以被同轨道卫星提供波束覆盖，或者采用异轨卫星服务更合适的情况。核心网可以根据星历和终端的位置相关信息确定多个备选星载基站，然后通过与这些备选星载基站进行协商，确定目标星载基站。In order to deal with the situation that it is difficult for the terminal to be covered by the beam provided by the satellite in the same orbit, or it is more appropriate to use the service of the off-orbit satellite. The core network can determine multiple candidate spaceborne base stations according to the ephemeris and the terminal's position-related information, and then determine the target spaceborne base station by negotiating with these candidate spaceborne base stations.
如，请参见图8为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图四。For example, please refer to FIG. 8 , which is a fourth schematic diagram of interaction of a terminal handover from a source satellite-borne base station to a target satellite-borne base station according to an embodiment of the present application.
步骤801：源星载基站根据星历信息和终端的位置相关信息，确定需要执行星间切换。Step 801: The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
步骤802：源星载基站向终端发送测量配置信息。Step 802: The source satellite-borne base station sends measurement configuration information to the terminal.
步骤803：终端返回测量报告。Step 803: the terminal returns a measurement report.
上述测量报告可以为邻区测量报告。The foregoing measurement report may be a neighboring cell measurement report.
步骤804：源星载基站根据测量报告，确定没有能为终端提供服务的备选目标卫星小区。Step 804: The source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal according to the measurement report.
步骤805：源星载基站向核心网发送N2切换要求。Step 805: The source onboard base station sends an N2 handover request to the core network.
步骤806：核心网根据星历信息和终端的位置相关信息，确定备选卫星。Step 806: The core network determines candidate satellites according to the ephemeris information and the location-related information of the terminal.
步骤807a：核心网向备选星载基站发送波束协商请求。Step 807a: The core network sends a beam negotiation request to the candidate spaceborne base station.
核心网分别向备选卫星1上的备选星载基站1、备选卫星2上的备选星载基站2发送波束协商请求，在该波束协商请求中携带终端的位置相关信息，用于向备选星载基站协商是否能为终端提供波束覆盖。The core network sends a beam negotiation request to the candidate satellite-borne base station 1 on the candidate satellite 1 and the candidate space-borne base station 2 on the candidate satellite 2, respectively, and the beam negotiation request carries the position-related information of the terminal, which is used to send The candidate spaceborne base station negotiates whether it can provide beam coverage for the terminal.
步骤807b：备选星载基站向核心网返回波束协商反馈。Step 807b: The candidate satellite-borne base station returns beam negotiation feedback to the core network.
核心网根据备选星载基站1返回的波束协商反馈确定其能为终端提供波束覆盖，根据备选星载基站2返回的波束协商反馈确定其不能为终端提供波束覆盖。因此，核心网最终确定备选星载基站1为目标星载基站。The core network determines that it can provide beam coverage for the terminal according to the beam negotiation feedback returned by the candidate spaceborne base station 1, and determines that it cannot provide beam coverage for the terminal according to the beam negotiation feedback returned by the candidate spaceborne base station 2. Therefore, the core network finally determines the candidate spaceborne base station 1 as the target spaceborne base station.
步骤808：核心网向备选星载基站1发送N2切换请求。Step 808: The core network sends an N2 handover request to the candidate satellite-borne base station 1 .
在核心网确定备选卫星1为目标卫星后，向备选星载基站1发送N2切换请求，N2切换请求用于请求为终端提供波束覆盖服务。在N2切换请求中可以不携带终端的位置相关信息。After the core network determines that the candidate satellite 1 is the target satellite, it sends an N2 handover request to the candidate satellite-borne base station 1, and the N2 handover request is used to request to provide beam coverage services for the terminal. The location-related information of the terminal may not be carried in the N2 handover request.
步骤809：备选星载基站1根据终端的位置相关信息调整波束，向终端提供波束覆盖。Step 809: The candidate spaceborne base station 1 adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
备选星载基站1根据终端的位置相关信息，让备选卫星1调整波束，向终端提供波束覆盖服务。The candidate satellite-borne base station 1 allows the candidate satellite 1 to adjust the beam according to the location-related information of the terminal, and provide beam coverage services to the terminal.
步骤810：备选星载基站1向核心网返回N2切换确认。Step 810: The candidate satellite-borne base station 1 returns an N2 handover confirmation to the core network.
步骤811：核心网向源星载基站发送切换命令。Step 811: The core network sends a handover command to the source on-board base station.
核心网在接收到N2切换确认后，向源星载基站发送切换命令。After receiving the N2 handover confirmation, the core network sends a handover command to the source onboard base station.
步骤812：源星载基站向终端转发切换命令。Step 812: The source satellite-borne base station forwards the switching command to the terminal.
步骤813：终端执行N2切换。Step 813: the terminal performs N2 handover.
在本申请提供的实施例中，通过与多个备选星载基站进行波束协商的方式，确定目标星载基站，可以避免担心过载的情况出现，从而使终端的业务保持稳定。In the embodiment provided in the present application, the target satellite-borne base station is determined by performing beam negotiation with multiple candidate satellite-borne base stations, which can avoid worrying about overloading and thus keep the service of the terminal stable.
通过卫星运控中心确定能为终端提供服务的目标卫星的方式：向卫星运控中心发送波束调度要求；其中，波束调度要求用于请求为终端确定目标卫星。The method of determining the target satellite that can provide services for the terminal through the satellite operation and control center: sending the beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
请参见图9为本申请实施例提供的终端从源星载基站切换到目标星载基站的交互示意图五。Please refer to FIG. 9 , which is a fifth schematic diagram of interaction of a terminal handover from a source on-board base station to a target on-board base station according to an embodiment of the present application.
步骤901：源星载基站根据星历信息和终端的位置相关信息，确定需要执行星间切换。Step 901: The source satellite-borne base station determines that inter-satellite handover needs to be performed according to the ephemeris information and the location-related information of the terminal.
步骤902：源星载基站向终端发送测量配置信息。Step 902: The source satellite-borne base station sends measurement configuration information to the terminal.
步骤903：终端返回测量报告。Step 903: the terminal returns a measurement report.
步骤904：源星载基站根据测量报告，确定没有能为终端提供服务的备选目标卫星小区。Step 904: According to the measurement report, the source satellite-borne base station determines that there is no candidate target satellite cell that can provide services for the terminal.
步骤905：源星载基站向卫星运控中心发送波束调度要求。Step 905: The source onboard base station sends a beam scheduling request to the satellite operation and control center.
步骤906：卫星运控中心根据星历信息和终端的位置相关信息，确定目标卫星。Step 906: The satellite operation and control center determines the target satellite according to the ephemeris information and the position-related information of the terminal.
步骤907：卫星运控中心向目标星载基站发送波束调度指令。Step 907: The satellite operation and control center sends beam scheduling instructions to the target satellite-borne base station.
该波束调度指令中携带终端的位置相关信息。The beam scheduling instruction carries position-related information of the terminal.
步骤908：目标星载基站根据终端的位置相关信息调整波束，向终端提供波束覆盖。Step 908: The target spaceborne base station adjusts the beam according to the location-related information of the terminal, and provides beam coverage to the terminal.
步骤909：目标星载基站向卫星运控中心返回波束调度结果。Step 909: The target satellite-borne base station returns the beam scheduling result to the satellite operation and control center.
步骤910：卫星运控中心向源星载基站发送波束调度反馈。Step 910: The satellite operation and control center sends beam scheduling feedback to the source onboard base station.
步骤911：终端执行Xn或N2切换。Step 911: The terminal performs Xn or N2 handover.
在本申请提供的实施例中，为需要执行星间切换的终端确定在调整波束后能为终端提供服务的目标卫星，从而在卫星的波束非连续覆盖的情况下， 避免出现没有合适的目标卫星接入小区的情况，进而将终端切换到目标卫星上的目标星载基站，防止终端的业务中断。In the embodiment provided by this application, the target satellite that can provide services for the terminal after adjusting the beam is determined for the terminal that needs to perform inter-satellite handover, so that in the case of non-continuous coverage of the satellite beam, it is avoided that there is no suitable target satellite In the case of access to the cell, the terminal is then handed over to the target satellite-borne base station on the target satellite to prevent the terminal's service from being interrupted.
在从源星载基站侧介绍完星间切换的方法后，下面将从目标星载基站侧进行介绍。After introducing the inter-satellite handover method from the side of the source satellite-borne base station, the following will introduce it from the side of the target satellite-borne base station.
基于同一发明构思，本申请实施例提供一种星间切换的方法，应用于目标星载基站，该目标星载基站侧的星间切换的方法的具体实施方式可参见源星载基站侧方法实施例部分的描述，重复之处不再赘述，请参见图10，该方法包括：Based on the same inventive concept, the embodiment of the present application provides a method for inter-satellite handover, which is applied to the target on-board base station. For the specific implementation of the method for the inter-satellite handover on the side of the target on-board base station, please refer to the method implementation on the side of the source on-board base station. The description of the example part, the repeated parts will not be repeated, please refer to Figure 10, the method includes:
步骤1001：根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；Step 1001: Adjust the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
步骤1002：返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。Step 1002: Return feedback information of completion of beam adjustment; wherein, the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
一种可能的实施方式，根据接收到的终端的位置相关信息，调整波束之前，还包括：In a possible implementation manner, before adjusting the beam according to the received position-related information of the terminal, the method further includes:
从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；receiving an Xn handover request from the source satellite-borne base station; wherein the Xn handover request carries the position-related information;
或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from a satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
一种可能的实施方式，从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，还包括：A possible implementation manner, after receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, further includes:
若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。If it is determined according to the position-related information that there is currently no beam resource to provide beam coverage to the terminal, a beam scheduling request is sent to the satellite operation and control center; wherein the beam scheduling request is used to request to increase the target satellite carrier The target satellite where the base station is located covers the beam of the terminal.
一种可能的实施方式，从核心网接收N2切换请求之前，还包括：A possible implementation manner, before receiving the N2 handover request from the core network, further includes:
接收所述核心网发送的波束协商请求；receiving a beam negotiation request sent by the core network;
根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
在从目标星载基站侧介绍完星间切换的方法后，下面将从核心网侧进行介绍。After introducing the inter-satellite handover method from the side of the target satellite-borne base station, the following will introduce it from the core network side.
基于同一发明构思，本申请实施例提供一种星间切换的方法，应用于核心网设备，该核心网设备侧的星间切换的方法的具体实施方式可参见源星载基站侧方法实施例部分的描述，重复之处不再赘述，请参见图11，该方法包括：Based on the same inventive concept, the embodiment of this application provides a method for inter-satellite handover, which is applied to core network equipment. For the specific implementation of the method for inter-satellite handover on the core network equipment side, please refer to the method embodiment part of the source satellite-borne base station side. The description of the method will not be repeated, please refer to Figure 11, the method includes:
步骤1101：接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；Step 1101: Receive the first N2 handover request sent by the source spaceborne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or the beam serving the terminal information; or receive the second N2 handover request sent by the source spaceborne base station, and initiate the process of locating the terminal according to the second N2 handover request, and obtain the current location of the terminal; the second N2 handover request The purpose of not carrying the information of the target cell or carrying the target access cell to be determined;
步骤1102：根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；Step 1102: Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
步骤1103：向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星通过调整波束为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。Step 1103: Send an N2 handover request to the target satellite-borne base station on the target satellite, the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to the Target satellite base station.
一种可能的实施方式，根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星，包括：In a possible implementation manner, determining a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information includes:
根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选卫星确定是否能为所述终端提供波束覆盖；sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
如图12所示，本申请实施例提供的一种源星载基站，包括：As shown in Figure 12, a source satellite-borne base station provided in the embodiment of the present application includes:
存储器1201，收发机1202，处理器1203： Memory 1201, transceiver 1202, processor 1203:
存储器1201，用于存储计算机程序；收发机1202，用于在所述处理器1203的控制下收发数据；处理器1203，用于读取所述存储器1201中的计算机程序并执行以下操作：The memory 1201 is used to store computer programs; the transceiver 1202 is used to send and receive data under the control of the processor 1203; the processor 1203 is used to read the computer programs in the memory 1201 and perform the following operations:
为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星为通过调整波束后为所述终端提供波束覆盖的卫星；Determining a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
将所述终端切换到所述目标卫星上的目标星载基站。Handing over the terminal to the target on-board base station on the target satellite.
一种可能的实施方式，所述处理器1203还用于：In a possible implementation manner, the processor 1203 is further configured to:
将星历信息中波束覆盖范围包括所述终端的当前位置或者当前服务所述终端的波束的覆盖范围的卫星，作为所述目标卫星；taking the satellites whose beam coverage in the ephemeris information includes the current position of the terminal or the coverage of the beam currently serving the terminal as the target satellite;
或，将星历信息中到达指定轨道位置的卫星，作为所述目标卫星。Or, the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
一种可能的实施方式，所述处理器1203还用于：In a possible implementation manner, the processor 1203 is further configured to:
确定能为所述终端提供服务的目标卫星之后，向所述目标卫星上的星载基站发送Xn切换请求；其中，所述Xn切换请求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。After determining the target satellite that can provide services for the terminal, send an Xn handover request to the on-board base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam currently serving the terminal Information, the beam information includes the wave position, the tracking area TA or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
一种可能的实施方式，所述处理器1203还用于：In a possible implementation manner, the processor 1203 is further configured to:
向核心网发送第一N2切换要求，所述第一N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第一N2切换要求携带所述终端的当前位置信息或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或所述源星载基站根据终端的当前位置映射生成的小区全球标识CGI。sending a first N2 handover request to the core network, where the first N2 handover request is used to request the core network to determine the target satellite, where the first N2 handover request carries the current location information of the terminal or the current service The beam information of the terminal, where the beam information includes a beam position, a tracking area TA, or a cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
或，向所述核心网发送第二N2切换要求，所述第二N2切换要求用于要 求所述核心网确定所述目标卫星，其中，所述第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途；Or, sending a second N2 handover request to the core network, where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
或，向卫星运控中心发送波束调度要求；其中，所述波束调度要求用于要求为所述终端确定所述目标卫星。Or, sending a beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
收发机1202，用于在处理器1203的控制下接收和发送数据。The transceiver 1202 is configured to receive and send data under the control of the processor 1203 .
其中，在图12中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1203代表的一个或多个处理器和存储器1201代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1202可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1203负责管理总线架构和通常的处理，存储器1201可以存储处理器1203在执行操作时所使用的数据。Wherein, in FIG. 12 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1203 and various circuits of the memory represented by the memory 1201 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. The transceiver 1202 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. The processor 1203 is responsible for managing the bus architecture and general processing, and the memory 1201 can store data used by the processor 1203 when performing operations.
处理器1203可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。The processor 1203 can be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
如图13所示，本申请实施例提供的一种目标星载基站，包括：As shown in Figure 13, a target satellite-borne base station provided by the embodiment of the present application includes:
存储器1301，收发机1302，处理器1303： Memory 1301, transceiver 1302, processor 1303:
存储器1301，用于存储计算机程序；收发机1302，用于在所述处理器1303的控制下收发数据；处理器1303，用于读取所述存储器1301中的计算机程序并执行以下操作：The memory 1301 is used to store computer programs; the transceiver 1302 is used to send and receive data under the control of the processor 1303; the processor 1303 is used to read the computer programs in the memory 1301 and perform the following operations:
根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；Adjusting the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端 对应的源星载基站通知所述终端切换到所述目标星载基站。Returning feedback information for completing beam adjustment; wherein, the feedback information is used to indicate that the source satellite-borne base station corresponding to the terminal notifies the terminal to switch to the target satellite-borne base station.
一种可能的实施方式，所述处理器1303还用于：In a possible implementation manner, the processor 1303 is further configured to:
根据接收到的终端的位置相关信息，调整波束之前，从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；According to the received location-related information of the terminal, before adjusting the beam, receive an Xn handover request from the source satellite-borne base station; wherein, the Xn handover request carries the location-related information;
或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from a satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
一种可能的实施方式，所述处理器1303还用于：In a possible implementation manner, the processor 1303 is further configured to:
从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。After receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, if it is determined according to the location-related information that there is currently no beam resource to provide beam coverage to the terminal, then send The control center sends a beam scheduling request; wherein, the beam scheduling request is used to request to add a beam covering the terminal in the target satellite where the target on-board base station is located.
一种可能的实施方式，所述处理器1303还用于：In a possible implementation manner, the processor 1303 is further configured to:
从核心网接收N2切换请求之前，接收所述核心网发送的波束协商请求；Before receiving the N2 handover request from the core network, receiving the beam negotiation request sent by the core network;
根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
收发机1302，用于在处理器1303的控制下接收和发送数据。The transceiver 1302 is used for receiving and sending data under the control of the processor 1303 .
其中，在图13中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1303代表的一个或多个处理器和存储器1301代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1302可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元， 这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1303负责管理总线架构和通常的处理，存储器1301可以存储处理器1303在执行操作时所使用的数据。Wherein, in FIG. 13 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1303 and various circuits of the memory represented by the memory 1301 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. The transceiver 1302 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. The processor 1303 is responsible for managing the bus architecture and general processing, and the memory 1301 can store data used by the processor 1303 when performing operations.
处理器1303可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。The processor 1303 can be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
如图14所示，本申请实施例提供的一种核心网设备，包括：As shown in FIG. 14, a core network device provided in an embodiment of the present application includes:
存储器1401，收发机1402，处理器1403； memory 1401, transceiver 1402, processor 1403;
存储器1401，用于存储计算机程序；收发机1402，用于在所述处理器1403的控制下收发数据；处理器1403，用于读取所述存储器1401中的计算机程序并执行以下操作：The memory 1401 is used to store computer programs; the transceiver 1402 is used to send and receive data under the control of the processor 1403; the processor 1403 is used to read the computer programs in the memory 1401 and perform the following operations:
接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；receiving the first N2 handover request sent by the source satellite-borne base station, where the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星通过调整波束为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。Sending an N2 handover request to the target on-board base station on the target satellite, the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal is handed over to the target on-board base station.
一种可能的实施方式，所述处理器1403还用于：In a possible implementation manner, the processor 1403 is further configured to:
根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选 卫星确定是否能为所述终端提供波束覆盖；Sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
收发机1402，用于在处理器1403的控制下接收和发送数据。The transceiver 1402 is configured to receive and send data under the control of the processor 1403 .
其中，在图14中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1403代表的一个或多个处理器和存储器1401代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1402可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1403负责管理总线架构和通常的处理，存储器1401可以存储处理器1403在执行操作时所使用的数据。Wherein, in FIG. 14 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1403 and various circuits of the memory represented by the memory 1401 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. The transceiver 1402 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. The processor 1403 is responsible for managing the bus architecture and general processing, and the memory 1401 can store data used by the processor 1403 when performing operations.
处理器1403可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。The processor 1403 may be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device , CPLD), the processor can also adopt a multi-core architecture.
在此需要说明的是，本申请实施例提供的上述装置，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。What needs to be explained here is that the above-mentioned device provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.
基于同一发明构思，本申请一实施例中提供一种源星载基站，该源星载基站的星间切换方法的具体实施方式可参见源星载基站侧方法实施例部分的描述，重复之处不再赘述，请参见图15，该源星载基站包括：Based on the same inventive concept, an embodiment of the present application provides a source satellite-borne base station. For the specific implementation of the inter-satellite handover method of the source satellite-borne base station, please refer to the description of the source satellite-borne base station method embodiment part. No more details, please refer to Figure 15, the source satellite-borne base station includes:
确定单元1501，用于为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星为通过调整波束后为所述终端提供波束覆盖的卫星；The determining unit 1501 is configured to determine a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal after beam adjustment;
切换单元1502，用于将所述终端切换到所述目标卫星上的目标星载基站。A switching unit 1502, configured to switch the terminal to a target on-board base station on the target satellite.
一种可能的实施方式，所述确定单元1501还用于：In a possible implementation manner, the determining unit 1501 is further configured to:
将星历信息中波束覆盖范围包括所述终端的当前位置或者当前服务所述终端的波束的覆盖范围的卫星，作为所述目标卫星；taking the satellites whose beam coverage in the ephemeris information includes the current position of the terminal or the coverage of the beam currently serving the terminal as the target satellite;
或，将星历信息中到达指定轨道位置的卫星，作为所述目标卫星。Or, the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
一种可能的实施方式，所述源星载基站还包括发送单元1503，所述发送单元1503用于：In a possible implementation manner, the source satellite-borne base station further includes a sending unit 1503, and the sending unit 1503 is configured to:
确定能为所述终端提供服务的目标卫星之后，向所述目标卫星上的星载基站发送Xn切换请求；其中，所述Xn切换请求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或源星载基站根据所述终端的当前位置映射生成的小区全球标识。After determining the target satellite that can provide services for the terminal, send an Xn handover request to the on-board base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam currently serving the terminal Information, the beam information includes the wave position, the tracking area TA or the global cell identity generated by the source spaceborne base station according to the current location mapping of the terminal.
一种可能的实施方式，所述确定单元1501还用于：In a possible implementation manner, the determining unit 1501 is further configured to:
向核心网发送第一N2切换要求，所述第一N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第一N2切换要求携带所述终端的当前位置信息或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。sending a first N2 handover request to the core network, where the first N2 handover request is used to request the core network to determine the target satellite, where the first N2 handover request carries the current location information of the terminal or the current service The beam information of the terminal, where the beam information includes a beam position, a tracking area TA, or a cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
或，向所述核心网发送第二N2切换要求，所述第二N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途；Or, sending a second N2 handover request to the core network, where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
或，向卫星运控中心发送波束调度要求；其中，所述波束调度要求用于要求为所述终端确定所述目标卫星。Or, sending a beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
基于同一发明构思，本申请一实施例中提供一种目标星载基站，该目标星载基站的星间切换的方法的具体实施方式可参见目标星载基站侧方法实施例部分的描述，重复之处不再赘述，请参见图16，该目标星载基站包括：Based on the same inventive concept, an embodiment of the present application provides a target satellite-borne base station. The specific implementation of the method for the inter-satellite handover of the target satellite-borne base station can refer to the description of the method embodiment part of the target satellite-borne base station side, and repeat No more details here, please refer to Figure 16, the target satellite-borne base station includes:
调整单元1601，用于根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；The adjustment unit 1601 is configured to adjust the beam according to the received position-related information of the terminal; wherein, the adjusted beam covers the terminal, and the position-related information includes the current position of the terminal or a beam serving the terminal information;
发送单元1602，用于返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基 站。The sending unit 1602 is configured to return feedback information for completing beam adjustment; wherein, the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
一种可能的实施方式，所述目标星载基站还包括接收单元1603，所述接收单元1603用于：In a possible implementation manner, the target spaceborne base station further includes a receiving unit 1603, and the receiving unit 1603 is configured to:
根据接收到的终端的位置相关信息，调整波束之前，从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；According to the received location-related information of the terminal, before adjusting the beam, receive an Xn handover request from the source satellite-borne base station; wherein, the Xn handover request carries the location-related information;
或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from a satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
一种可能的实施方式，所述发送单元1602还用于：In a possible implementation manner, the sending unit 1602 is further configured to:
从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。After receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, if it is determined according to the location-related information that there is currently no beam resource to provide beam coverage to the terminal, then send The control center sends a beam scheduling request; wherein, the beam scheduling request is used to request to add a beam covering the terminal in the target satellite where the target on-board base station is located.
一种可能的实施方式，所述接收单元1603还用于：In a possible implementation manner, the receiving unit 1603 is further configured to:
从核心网接收N2切换请求之前，接收所述核心网发送的波束协商请求；Before receiving the N2 handover request from the core network, receiving the beam negotiation request sent by the core network;
根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
基于同一发明构思，本申请一实施例中提供一种核心网设备，该核心网设备的星间切换方法的具体实施方式可参见方法实施例部分的描述，重复之处不再赘述，请参见图17，该核心网设备包括：Based on the same inventive concept, an embodiment of the present application provides a core network device. For the specific implementation of the inter-satellite handover method of the core network device, please refer to the description of the method embodiment. 17. The core network equipment includes:
接收单元1701，用于接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第 二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；The receiving unit 1701 is configured to receive the first N2 handover request sent by the source satellite-borne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or the Beam information of the terminal; or receiving a second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second The N2 handover request does not carry target cell information or carries the purpose of the target access cell to be determined;
确定单元1702，用于根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；A determining unit 1702, configured to determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
发送单元1703，用于向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星通过调整波束为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。The sending unit 1703 is configured to send an N2 handover request to the target satellite-borne base station on the target satellite, and the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal by adjusting the beam, so that the terminal switches to the target satellite-borne base station.
一种可能的实施方式，所述确定单元1702还用于：In a possible implementation manner, the determining unit 1702 is further configured to:
根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选卫星确定是否能为所述终端提供波束覆盖；sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个处理器可读取存储介质中。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全部或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)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、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。If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or 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 to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
在此需要说明的是，本申请实施例提供的上述装置，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。What needs to be explained here is that the above-mentioned device provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.
基于同一发明构思，本申请实施例还提一种处理器可读存储介质，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行如上所述的源星载基站或目标星载基站或核心网所述的星间切换方法。Based on the same inventive concept, an embodiment of the present application further provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above source The satellite-borne base station or the target satellite-borne base station or the inter-satellite handover method described in the core network.
所述处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备，包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.
本领域内的技术人员应明白，本申请的实施例可提供为方法、***、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
本申请是参照根据本申请实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagrams, and combinations of procedures and/or blocks in the flowchart and/or block diagrams can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine, such that instructions executed by the processor of the computer or other programmable data processing equipment produce Means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理 设备以特定方式工作的处理器可读存储器中，使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented The executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (24)

  1. 一种星间切换的方法，应用于源星载基站，其特征在于，所述方法包括：A method for inter-satellite handover, applied to a source satellite-borne base station, characterized in that the method comprises:
    为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星是为所述终端提供波束覆盖的卫星；determining a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage for the terminal;
    将所述终端切换到所述目标卫星上的目标星载基站。Handing over the terminal to the target on-board base station on the target satellite.
  2. 如权利要求1所述的方法，其特征在于，为需要执行星间切换的终端确定目标卫星，包括：The method according to claim 1, wherein determining a target satellite for a terminal that needs to perform inter-satellite handover comprises:
    将星历信息中波束覆盖范围包括所述终端的当前位置或者当前服务所述终端的波束的覆盖范围的卫星，作为所述目标卫星；taking the satellites whose beam coverage in the ephemeris information includes the current position of the terminal or the coverage of the beam currently serving the terminal as the target satellite;
    或，将星历信息中到达指定轨道位置的卫星，作为所述目标卫星。Or, the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
  3. 如权利要求2所述的方法，其特征在于，为需要执行星间切换的终端确定目标卫星之后，还包括：The method according to claim 2, wherein after determining the target satellite for the terminal that needs to perform inter-satellite handover, it also includes:
    向所述目标卫星上的星载基站发送Xn切换请求；其中，所述Xn切换请求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。Send an Xn handover request to the satellite-borne base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or beam information currently serving the terminal, and the beam information includes wave position, tracking area TA Or the source on-board base station maps the cell global identity CGI generated according to the current location of the terminal.
  4. 如权利要求1所述的方法，其特征在于，为需要执行星间切换的终端确定目标卫星，包括：The method according to claim 1, wherein determining a target satellite for a terminal that needs to perform inter-satellite handover comprises:
    向核心网发送第一N2切换要求，所述第一N2切换要求用于要求所述核心网确定目标卫星，其中，所述第一N2切换要求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区或所述源星载基站根据所述终端的位置映射生成的接入小区全球标识；Sending a first N2 handover request to the core network, where the first N2 handover request is used to request the core network to determine a target satellite, where the first N2 handover request carries the current location of the terminal or the terminal currently serving the terminal The beam information includes the beam position, the tracking area, or the access cell global identifier generated by the source spaceborne base station according to the location mapping of the terminal;
    或，向所述核心网发送第二N2切换要求，所述第二N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途；Or, sending a second N2 handover request to the core network, where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
    或，向卫星运控中心发送波束调度要求；其中，所述波束调度要求用于要求为所述终端确定所述目标卫星。Or, sending a beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
  5. 一种星间切换的方法，应用于目标星载基站，其特征在于，所述方法包括：A method for inter-satellite handover, applied to a target satellite-borne base station, characterized in that the method comprises:
    根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；Adjusting the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
    返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。Returning feedback information for completing the beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  6. 如权利要求5所述的方法，其特征在于，根据接收到的终端的位置相关信息，调整波束之前，还包括：The method according to claim 5, characterized in that, before adjusting the beam according to the received position-related information of the terminal, further comprising:
    从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；receiving an Xn handover request from the source satellite-borne base station; wherein the Xn handover request carries the position-related information;
    或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
    或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from the satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  7. 如权利要求6所述的方法，其特征在于，从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，还包括：The method according to claim 6, wherein after receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, further comprising:
    若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。If it is determined according to the position-related information that there is currently no beam resource to provide beam coverage to the terminal, a beam scheduling request is sent to the satellite operation and control center; wherein the beam scheduling request is used to request to increase the target satellite carrier The target satellite where the base station is located covers the beam of the terminal.
  8. 如权利要求6所述的方法，其特征在于，从核心网接收N2切换请求之前，还包括：The method according to claim 6, wherein, before receiving the N2 handover request from the core network, further comprising:
    接收所述核心网发送的波束协商请求；receiving a beam negotiation request sent by the core network;
    根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端 提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
    若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
  9. 一种星间切换的方法，应用于核心网设备，其特征在于，所述方法包括：A method for inter-satellite handover, applied to core network equipment, characterized in that the method comprises:
    接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；receiving the first N2 handover request sent by the source satellite-borne base station, where the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
    根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
    向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。Sending an N2 handover request to a target on-board base station on the target satellite, where the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal, so that the terminal is handed over to the target on-board base station.
  10. 如权利要求9所述的方法，其特征在于，根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星，包括：The method according to claim 9, wherein, according to the current position or the beam information and ephemeris information, determining a target satellite that can provide beam coverage for the terminal includes:
    根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
    向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选卫星确定是否能为所述终端提供波束覆盖；sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
    将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  11. 一种源星载基站，其特征在于，包括存储器，收发机，处理器：A source satellite-borne base station is characterized in that it includes a memory, a transceiver, and a processor:
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
    为需要执行星间切换的终端确定能目标卫星，其中，所述目标卫星是为所述终端提供波束覆盖的卫星；Determining a target satellite for a terminal that needs to perform inter-satellite handover, where the target satellite is a satellite that provides beam coverage for the terminal;
    将所述终端切换到所述目标卫星上的目标星载基站。Handing over the terminal to the target on-board base station on the target satellite.
  12. 如权利要求11所述的源星载基站，其特征在于，所述处理器还用于：The source spaceborne base station according to claim 11, wherein the processor is also used for:
    将星历信息中波束覆盖范围包括所述终端的当前位置或者当前服务所述终端的波束的覆盖范围的卫星，作为所述目标卫星；taking the satellites whose beam coverage in the ephemeris information includes the current position of the terminal or the coverage of the beam currently serving the terminal as the target satellite;
    或，将星历信息中到达指定轨道位置的卫星，作为所述目标卫星。Or, the satellite that reaches the designated orbital position in the ephemeris information is used as the target satellite.
  13. 如权利要求12所述的源星载基站，其特征在于，所述处理器还用于：The source spaceborne base station according to claim 12, wherein the processor is also used for:
    确定能为所述终端提供服务的目标卫星之后，向所述目标卫星上的星载基站发送Xn切换请求；其中，所述Xn切换请求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI。After determining the target satellite that can provide services for the terminal, send an Xn handover request to the on-board base station on the target satellite; wherein, the Xn handover request carries the current position of the terminal or the beam currently serving the terminal information, the beam information includes the wave position, the tracking area TA, or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal.
  14. 如权利要求11所述的源星载基站，其特征在于，所述处理器还用于：The source spaceborne base station according to claim 11, wherein the processor is also used for:
    向核心网发送第一N2切换要求，所述第一N2切换要求用于要求所述核心网确定目标卫星，其中，所述第一N2切换要求携带所述终端的当前位置或者当前服务所述终端的波束信息，所述波束信息包括波位、跟踪区TA或所述源星载基站根据所述终端的当前位置映射生成的小区全球标识CGI；Sending a first N2 handover request to the core network, where the first N2 handover request is used to request the core network to determine a target satellite, where the first N2 handover request carries the current location of the terminal or the terminal currently serving the terminal The beam information includes the beam position, the tracking area TA or the cell global identity CGI generated by the source spaceborne base station according to the current location mapping of the terminal;
    或，向所述核心网发送第二N2切换要求，所述第二N2切换要求用于要求所述核心网确定所述目标卫星，其中，所述第二N2切换要求不携带具体目标小区信息或携带待确定的目标接入小区的用途；Or, sending a second N2 handover request to the core network, where the second N2 handover request is used to require the core network to determine the target satellite, where the second N2 handover request does not carry specific target cell information or The purpose of carrying the target to be determined to access the cell;
    或，向卫星运控中心发送波束调度要求；其中，所述波束调度要求用于要求为所述终端确定所述目标卫星。Or, sending a beam scheduling request to the satellite operation and control center; wherein, the beam scheduling request is used to request to determine the target satellite for the terminal.
  15. 一种目标星载基站，其特征在于，包括存储器，收发机，处理器：A target satellite-borne base station is characterized in that it includes a memory, a transceiver, and a processor:
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
    根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终 端的波束信息；adjusting the beam according to the received location-related information of the terminal; wherein, the adjusted beam covers the terminal, and the location-related information includes the current location of the terminal or beam information serving the terminal;
    返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。Returning feedback information for completing the beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  16. 如权利要求15所述的目标星载基站，其特征在于，所述处理器还用于：The target spaceborne base station according to claim 15, wherein the processor is also used for:
    根据接收到的终端的位置相关信息，调整波束之前，从所述源星载基站接收Xn切换请求；其中，所述Xn切换请求中携带所述位置相关信息；According to the received location-related information of the terminal, before adjusting the beam, receive an Xn handover request from the source satellite-borne base station; wherein, the Xn handover request carries the location-related information;
    或，从核心网接收N2切换请求；其中，所述N2切换请求中携带所述位置相关信息；Or, receiving an N2 handover request from the core network; wherein, the N2 handover request carries the location-related information;
    或，从卫星运控中心接收波束调度指令；其中，所述波束调度指令中携带所述位置相关信息，在位置相关信息包括服务所述终端的波束信息时，所述波束信息为服务使所述终端的波位。Or, receiving a beam scheduling instruction from a satellite operation and control center; wherein, the beam scheduling instruction carries the location-related information, and when the location-related information includes beam information serving the terminal, the beam information is the service that enables the The wave position of the terminal.
  17. 如权利要求16所述的目标星载基站，其特征在于，所述处理器还用于：The target spaceborne base station according to claim 16, wherein the processor is also used for:
    从所述源星载基站接收Xn切换请求后，或从核心网接收N2切换请求后，若根据所述位置相关信息，确定目前没有波束资源向所述终端提供波束覆盖，则向所述卫星运控中心发送波束调度请求；其中，所述波束调度请求用于请求增加所述目标星载基站所在目标卫星中覆盖所述终端的波束。After receiving the Xn handover request from the source satellite-borne base station, or after receiving the N2 handover request from the core network, if it is determined according to the location-related information that there is currently no beam resource to provide beam coverage to the terminal, then send The control center sends a beam scheduling request; wherein, the beam scheduling request is used to request to add a beam covering the terminal in the target satellite where the target on-board base station is located.
  18. 如权利要求16所述的目标星载基站，其特征在于，所述处理器还用于：The target spaceborne base station according to claim 16, wherein the processor is also used for:
    从核心网接收N2切换请求之前，接收所述核心网发送的波束协商请求；Before receiving the N2 handover request from the core network, receiving the beam negotiation request sent by the core network;
    根据所述波束协商请求及波束资源的使用情况，确定是否能为所述终端提供波束覆盖；Determine whether beam coverage can be provided for the terminal according to the beam negotiation request and the usage of beam resources;
    若确定能为所述终端提供波束覆盖，则向所述核心网返回确认信息，否则返回拒绝信息。If it is determined that beam coverage can be provided for the terminal, return confirmation information to the core network, otherwise return rejection information.
  19. 一种核心网设备，其特征在于，包括存储器，收发机，处理器：A core network device, characterized in that it includes a memory, a transceiver, and a processor:
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收 发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
    接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；receiving the first N2 handover request sent by the source satellite-borne base station, where the first N2 handover request carries location-related information of the terminal, where the location-related information includes the current location of the terminal or beam information serving the terminal; or receiving the second N2 handover request sent by the source satellite-borne base station, and initiating a process of locating the terminal according to the second N2 handover request, and obtaining the current location of the terminal; the second N2 handover request does not carry Target cell information or the purpose of carrying the target access cell to be determined;
    根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；Determine a target satellite that can provide beam coverage for the terminal according to the current position or the beam information and ephemeris information;
    向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。Sending an N2 handover request to a target on-board base station on the target satellite, where the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal, so that the terminal is handed over to the target on-board base station.
  20. 如权利要求19所述的核心网设备，其特征在于，所述处理器还用于：The core network device according to claim 19, wherein the processor is also used for:
    根据当前位置或服务所述终端的波束信息及星历信息，确定多个备选卫星；Determine a plurality of candidate satellites according to the current position or beam information and ephemeris information serving the terminal;
    向每个备选卫星发送波束协商请求，所述波束协商请求用于向所述备选卫星确定是否能为所述终端提供波束覆盖；sending a beam negotiation request to each candidate satellite, where the beam negotiation request is used to determine whether beam coverage can be provided for the terminal to the candidate satellite;
    将所述波束协商请求对应的波束协商反馈中，确认能为所述终端提供波束覆盖的备选卫星作为所述目标卫星。In the beam negotiation feedback corresponding to the beam negotiation request, a candidate satellite that can provide beam coverage for the terminal is confirmed as the target satellite.
  21. 一种源星载基站，其特征在于，包括：A source satellite-borne base station is characterized in that it comprises:
    确定单元，用于为需要执行星间切换的终端确定目标卫星，其中，所述目标卫星为向所述终端提供波束覆盖的卫星；a determining unit, configured to determine a target satellite for a terminal that needs to perform inter-satellite handover, wherein the target satellite is a satellite that provides beam coverage to the terminal;
    切换单元，用于将所述终端切换到所述目标卫星上的目标星载基站。A switching unit, configured to switch the terminal to a target on-board base station on the target satellite.
  22. 一种目标星载基站，其特征在于，包括：A target spaceborne base station, characterized in that it comprises:
    调整单元，用于根据接收到的终端的位置相关信息，调整波束；其中，调整波束后的波束覆盖所述终端，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；An adjusting unit, configured to adjust the beam according to the received position-related information of the terminal; wherein, the adjusted beam covers the terminal, and the position-related information includes the current position of the terminal or beam information serving the terminal ;
    发送单元，用于返回完成波束调整的反馈信息；其中，所述反馈信息用于指示所述终端对应的源星载基站通知所述终端切换到所述目标星载基站。The sending unit is configured to return feedback information for completing beam adjustment; wherein the feedback information is used to instruct the source satellite-borne base station corresponding to the terminal to notify the terminal to switch to the target satellite-borne base station.
  23. 一种核心网设备，其特征在于，包括：A core network device, characterized in that it includes:
    接收单元，用于接收源星载基站发送的第一N2切换要求，所述第一N2切换要求中携带终端的位置相关信息，所述位置相关信息包括所述终端的当前位置或服务所述终端的波束信息；或者接收所述源星载基站发送的第二N2切换要求，并根据所述第二N2切换要求发起定位所述终端的过程，获取所述终端的当前位置；所述第二N2切换要求中不携带目标小区信息或携带待确定的目标接入小区的用途；The receiving unit is configured to receive the first N2 handover request sent by the source satellite-borne base station, the first N2 handover request carries the location-related information of the terminal, and the location-related information includes the current location of the terminal or serves the terminal beam information; or receive a second N2 handover request sent by the source spaceborne base station, and initiate a process of locating the terminal according to the second N2 handover request, and acquire the current location of the terminal; the second N2 The handover request does not carry the target cell information or carries the purpose of the target access cell to be determined;
    确定单元，用于根据所述当前位置或所述波束信息及星历信息，确定能为所述终端提供波束覆盖的目标卫星；a determining unit, configured to determine a target satellite capable of providing beam coverage for the terminal according to the current position or the beam information and ephemeris information;
    发送单元，用于向所述目标卫星上的目标星载基站发送N2切换请求，所述N2切换请求用于指示所述目标卫星为所述终端提供波束覆盖，使所述终端切换到所述目标星载基站。A sending unit, configured to send an N2 handover request to a target satellite-borne base station on the target satellite, where the N2 handover request is used to instruct the target satellite to provide beam coverage for the terminal, so that the terminal is handed over to the target Satellite base station.
  24. 一种处理器可读存储介质，其特征在于，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行权利要求1-4任一项所述的方法，或者执行权利要求5-8任一项所述的方法，或者执行权利要求9-10任一项所述的方法。A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to any one of claims 1-4 , or execute the method described in any one of claims 5-8, or execute the method described in any one of claims 9-10.
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