Satellite-ground network switching method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of wireless communication, and provides a satellite-ground network switching method and device, electronic equipment and a storage medium. The method comprises the following steps: determining that first terminal equipment accesses a ground network provided by the first terminal equipment; determining at least one candidate target cell according to the neighbor relation information of the cell; the first terminal equipment sends measurement configuration carrying information of the at least one candidate target cell, so that the first terminal equipment carries out measurement reporting based on the measurement configuration; and receiving a measurement report for the measurement configuration sent by the first terminal device, and sending a switching command for switching to one of the at least one candidate target cell to the first terminal device. According to the satellite-ground network switching method and device, the electronic equipment and the storage medium provided by the invention, the switching of the terminal equipment can be efficiently and accurately executed in the hot spot region, so that the stability and reliability of communication service are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular to a satellite-ground network switching method and device, an electronic device and a storage medium. BACKGROUND

[0002] Under the background of the continuous development of satellite-ground integration industry, there are two typical scenarios for satellite-ground collaborative deployment. One is that satellites complement the blind area of ground networks, and satellite networks cover remote areas that are not covered by ground cellular networks, so as to reduce the construction and operation and maintenance costs of ground base stations. The other is that satellites serve as temporary coverage in special scenarios, such as emergency coverage when the ground network is paralyzed or load balancing in hot areas. Since the coverage range of a single satellite is extremely large, it can reach tens of thousands or even hundreds of thousands of square kilometers, containing hundreds of wave positions, and a single beam covers several hundred to several thousand square kilometers. The coverage range of a ground base station is usually only a few square kilometers, which is much smaller than that of a satellite. This leads to a large number of ground cells in the overlapping area of satellite-ground collaborative networking scenarios.

[0003] Under the existing satellite-ground collaborative networking mode, the TN network (Terrestrial Network) priority principle is followed, and the terminal preferentially accesses the TN network when there is TN network coverage and the signal strength meets the requirements. However, in the load balancing scenario of hot areas, there is TN and NTN network (Non-Terrestrial Network) coverage in the same area, and when the terminal moves to a TN cell with NTN coverage, both the TN and NTN cells are adjacent cells. At this time, the TN base station is heavily loaded and has limited capacity, and if the TN priority principle is still followed for switching, it will lead to switching or reselection failure.

[0004] Therefore, how to efficiently and accurately perform the switching of terminal devices in hot areas to ensure the stability and reliability of communication services is a technical problem to be solved. SUMMARY

[0005] The embodiments of the present application provide a satellite-ground network switching method, device, electronic device and storage medium to solve the above technical problems, efficiently and accurately perform the switching of terminal devices in hot areas to ensure the stability and reliability of communication services.

[0006] In a first aspect, the embodiments of the present application provide a satellite-ground network switching method applied to a first ground network base station, comprising: determining that the first terminal device accesses a terrestrial network provided by itself; determining at least one candidate target cell according to a neighbor relation information of the first terminal device; wherein a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by the terrestrial network, and the second communication cell is covered by a non-terrestrial network; sending, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration; and receiving a measurement report sent by the first terminal device for the measurement configuration, and sending, to the first terminal device, a handover command for handover to one of the at least one candidate target cell.

[0007] In one embodiment, the method further comprises: receiving the neighbor relation information issued by the space-ground cooperative gateway; wherein the neighbor relation information is filtered out from a neighbor relation mapping table by the space-ground cooperative gateway, the neighbor relation mapping table records the adjacency relationship of each communication cell in the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor cell of other cells has a physical resource block utilization less than a preset threshold; and deploying the neighbor relation information locally.

[0008] In one embodiment, the method further comprises: receiving an update notification of the neighbor relation information from the space-ground cooperative gateway; and deploying the updated neighbor relation information locally; wherein the updated neighbor relation information is filtered out from the updated neighbor relation mapping table by the space-ground cooperative gateway after receiving a triggering event of a change in physical resource block utilization; and wherein the triggering event is reported to the space-ground cooperative gateway after a ground network base station covering the first communication cell determines that the change in physical resource block utilization satisfies a triggering condition.

[0009] In one embodiment, the triggering condition comprises a change of the physical resource block utilization from a first value less than a preset threshold to a second value greater than the preset threshold, or from the second value to the first value, and the change is maintained for a preset time length.

[0010] In a second aspect, the embodiments of the present application provide a satellite-to-ground network switching method, applied to a second ground network base station, comprising: determining that a physical resource block utilization rate change satisfies a triggering condition; and reporting a triggering event for the physical resource block utilization rate change to a satellite-to-ground cooperation gateway; wherein, after receiving the triggering event, the satellite-to-ground cooperation gateway updates a neighbor relation mapping table, and filters out neighbor relation update information of a ground network base station from the updated neighbor relation mapping table, and sends an update notification for the neighbor relation information to the ground network base station whose neighbor relation is changed; wherein, the neighbor relation mapping table records the neighbor relation of each communication cell in the management range of the satellite-to-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as the second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein, the second ground network base station is a ground network base station covering the first communication cell.

[0011] In one embodiment, the triggering condition comprises: the triggering condition comprises that the physical resource block utilization rate changes from a first value less than a preset threshold to a second value greater than the preset threshold, or changes from the second value to the first value, and the change remains for a preset time length.

[0012] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the first value to the second value, and the change remains for a preset time length; and replacing the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with its corresponding second communication cell.

[0013] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the second value to the first value, and the change remains for a preset time length; and replacing the second communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with its corresponding first communication cell.

[0014] In a third aspect, the embodiments of the present application provide a satellite-to-ground network switching method applied to a first terminal device, comprising: receiving a measurement configuration sent by a ground network base station, the measurement configuration carrying information of candidate target cells; performing measurement reporting on the at least one candidate target cell according to the measurement configuration and a measurement threshold configuration; receiving a switching command sent by the ground network base station, the switching command being to switch to one of the at least one candidate target cell, and initiating a network access application to a ground network base station or a non-ground network base station covering the candidate target cell; wherein the measurement configuration is sent by the first ground network base station to the first terminal device after the first ground network base station determines that the first terminal device accesses a ground network provided by the first ground network base station, determines at least one candidate target cell according to its own neighbor relation information, and sends the measurement configuration; wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a satellite-to-ground cooperation gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the satellite-to-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; and wherein the switching command is sent by the ground network base station after the ground network base station receives the measurement report sent by the first terminal device on the measurement configuration.

[0015] In a fourth aspect, the embodiments of the present application provide a satellite-to-ground network switching method applied to a satellite-to-ground cooperation gateway, comprising: obtaining service area information of a ground network cell and service area information of a non-ground network cell in the management range of the satellite-to-ground cooperation gateway; establishing a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; wherein the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the satellite-to-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold; filtering out neighbor relation information for each ground network base station from the neighbor relation mapping table, and sending the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when the each ground network base station determines that a first terminal device accesses a ground network provided by the each ground network base station, the each ground network base station determines at least one candidate target cell according to its own neighbor relation information, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after the each ground network base station receives a measurement report sent by the first terminal device on the measurement configuration, sends a switching command to the first terminal device, the switching command being to switch to one of the at least one candidate target cell.

[0016] In one embodiment, the method further comprises: receiving a triggering event for a change in physical resource block utilization; updating the neighbor relation mapping table; issuing an update notification for the neighbor relation mapping table to ground network base stations within a self-managed range; wherein the triggering event is that a ground network base station covering the first communication cell reports to the space-ground cooperation gateway after determining that a change in its physical resource block utilization satisfies a triggering condition.

[0017] In one embodiment, the triggering condition comprises that the physical resource block utilization changes from a first value less than a preset threshold value to a second value greater than the preset threshold value, or changes from the second value to the first value, and the change remains for a preset time length.

[0018] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization changes from the first value to the second value and the change remains for a preset time length; and replacing the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with a corresponding second communication cell.

[0019] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization changes from the second value to the first value and the change remains for a preset time length; and replacing the second communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with a corresponding first communication cell.

[0020] In one embodiment, the service area information of the non-ground network cell comprises at least satellite ephemeris information, non-ground network serving cell information, intra-cell wave position information, and ground network neighbor information; and the service area information of the ground network cell comprises at least base station identification, base station location information, base station corresponding cell information, and non-ground network neighbor information.

[0021] In a fifth aspect, an embodiment of the present application provides a space-ground network switching device, arranged in a first ground network base station, comprising: The first determining module is configured to determine that the first terminal device accesses a terrestrial network provided by itself; the second determining module is configured to determine at least one candidate target cell according to the neighbor relation information of itself; wherein, a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by the terrestrial network, and the second communication cell is covered by a non-terrestrial network; the sending module is configured to send, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement and reporting based on the measurement configuration; and the receiving module is configured to receive a measurement report sent by the first terminal device for the measurement configuration, and send, to the first terminal device, a handover command for switching to one of the at least one candidate target cell.

[0022] In a sixth aspect, an embodiment of the present application provides a satellite-terrestrial network switching device, which is arranged in a second terrestrial network base station, and includes: a determining module configured to determine that a physical resource block utilization changes to meet a triggering condition; and a reporting module configured to report a triggering event for the physical resource block utilization change to a satellite-terrestrial cooperation gateway; wherein, after receiving the triggering event, the satellite-terrestrial cooperation gateway updates a neighbor relation mapping table, and filters out neighbor relation update information of a terrestrial network base station from the updated neighbor relation mapping table, and sends an update notification for the neighbor relation information to a terrestrial network base station in which a neighbor relation is changed; the neighbor relation mapping table records a neighbor relation of each communication cell in a management range of the satellite-terrestrial cooperation gateway, and a first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization less than a preset threshold; the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by a terrestrial network, and the second communication cell is covered by a non-terrestrial network; wherein, the second terrestrial network base station is a terrestrial network base station covering the first communication cell.

[0023] In a seventh aspect, an embodiment of the present application provides a satellite-to-ground network switching device, arranged in a first terminal device, comprising: a receiving module, configured to receive a measurement configuration sent by a ground network base station, the measurement configuration carrying information of candidate target cells; a measurement module, configured to perform measurement reporting on the at least one candidate target cell according to the measurement configuration and a measurement threshold configuration; and a switching module, configured to receive a switching command sent by the ground network base station, the switching command instructing to switch to one of the at least one candidate target cell, and to initiate a network access application to a ground network base station or a non-ground network base station covering the candidate target cell; wherein the measurement configuration is sent by the first ground network base station to the first terminal device after the first ground network base station determines that the first terminal device accesses a ground network provided by the first ground network base station, determines at least one candidate target cell according to its own neighbor relation information, and sends the measurement configuration; wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a satellite-to-ground cooperation gateway and sent to the ground network base station, the neighbor relation mapping table records the neighbor relation of each communication cell in the management range of the satellite-to-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; and wherein the switching command is sent by the ground network base station after the ground network base station receives a measurement report sent by the first terminal device on the measurement configuration.

[0024] In an eighth aspect, an embodiment of the present application provides a satellite-to-ground network switching device, arranged in a satellite-to-ground cooperation gateway, comprising: an obtaining module, configured to establish a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; wherein the neighbor relation mapping table records the neighbor relation of each communication cell in the management range of the satellite-to-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; and a sending module, configured to filter out the neighbor relation information of each ground network base station from the neighbor relation mapping table, and send the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when the ground network base station determines that a first terminal device accesses a ground network provided by the ground network base station, the ground network base station determines at least one candidate target cell according to its own neighbor relation information, sends a measurement configuration carrying the information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving a measurement report sent by the first terminal device on the measurement configuration, sends a switching command to the first terminal device, the switching command instructing to switch to one of the at least one candidate target cell.

[0025] In a ninth aspect, an embodiment of the present application provides a memory for storing a computer program; a transceiver for transceiving data under control of the processor; and a processor for reading the computer program in the memory and performing the following operations: receiving a measurement configuration carrying information of candidate target cells sent by a ground network base station; performing measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to a ground network base station or a non-ground network base station covering the candidate target cell; wherein the measurement configuration is sent by the first ground network base station to the first terminal device after determining that the first terminal device accesses a ground network provided by the first ground network base station, determining at least one candidate target cell according to its own neighbor relation information; wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a space-ground cooperation gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the space-ground cooperation gateway, the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; and wherein the handover command is sent by the ground network base station after receiving the measurement report for the measurement configuration sent by the first terminal device.

[0026] In a tenth aspect, an embodiment of the present application provides a network device, comprising a memory, a transceiver, and a processor; the memory is for storing a computer program; the transceiver is for transceiving data under control of the processor; and the processor is for reading the computer program in the memory and performing the following operations: determining that a first terminal device accesses a ground network provided by the network device; determining at least one candidate target cell according to its own neighbor relation information; wherein a first communication cell in the neighbor relation information has a physical resource block utilization rate less than a preset threshold, the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; sending a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration; receiving a measurement report for the measurement configuration sent by the first terminal device, and sending a handover command to the first terminal device to hand over to one of the at least one candidate target cell; or Measurement configuration received from the terrestrial network base station carrying information about candidate target cells; According to the measurement threshold configuration, measurement reporting is performed for at least one candidate target cell. Upon receiving a handover command from the terrestrial network base station to switch to one of the candidate target cells, a network access request is initiated to the terrestrial network base station or non-terrestrial network covering the candidate target cell. The measurement configuration is determined by the first terrestrial network base station after determining that the first terminal device is accessing its own terrestrial network and identifying at least one candidate target cell based on its neighbor cell relationship information. The neighbor cell relationship information is filtered from a neighbor cell relationship mapping table by the satellite-ground cooperation gateway and sent to the terrestrial network base station. The neighbor cell relationship mapping table records the adjacency relationships of communication cells within the management scope of the satellite-ground cooperation gateway. The first communication cell, recorded in the neighbor cell relationship mapping table as a neighbor of other cells, has a physical resource block utilization rate less than a preset threshold. The first communication cell corresponds to the same physical area as the second communication cell, is covered by the terrestrial network, and the second communication cell is covered by a non-terrestrial network. The handover command is sent by the terrestrial network base station after receiving the measurement report for the measurement configuration from the first terminal device. or, Obtain service area information of terrestrial network cells and non-terrestrial network cells within its own management scope; A neighbor cell relationship mapping table is established based on the service area information of the terrestrial network cell and the service area information of the non-terrestrial network cell. The neighbor cell relationship mapping table records the adjacency relationships of each communication cell within the management range of the satellite-ground cooperation gateway. The first communication cell recorded in the neighbor cell relationship mapping table as a neighbor cell of other cells has a physical resource block utilization rate less than a preset threshold. Neighbor cell relationship information for each terrestrial network base station is filtered from the neighbor cell relationship mapping table, and this information is sent to the corresponding terrestrial network base station. This allows each terrestrial network base station, upon determining that the first terminal device is accessing its provided terrestrial network, to identify at least one candidate target cell based on its own neighbor cell relationship information. The base station then sends a measurement configuration carrying information about the at least one candidate target cell to the first terminal device. This enables the first terminal device to perform measurement reporting based on the measurement configuration. Upon receiving the measurement report from the first terminal device regarding the measurement configuration, the base station sends a handover command to the first terminal device to switch to one of the at least one candidate target cell.

[0027] In a eleventh aspect, an electronic device is provided, which comprises a processor and a memory storing a computer program, and the processor implements the steps of the satellite-to-ground network switching method of the first aspect or the second aspect or the third aspect or the fourth aspect when executing the program.

[0028] In a twelfth aspect, a non-transitory computer-readable storage medium is provided, which stores a computer program, and the computer program implements the steps of the satellite-to-ground network switching method of the first aspect or the second aspect or the third aspect or the fourth aspect when executed by a processor.

[0029] In a thirteenth aspect, a computer program product is provided, which comprises a computer program, and the computer program implements the steps of the satellite-to-ground network switching method of the first aspect or the second aspect or the third aspect or the fourth aspect when executed by a processor.

[0030] The satellite-to-ground network switching method, device, electronic device and storage medium provided by the embodiments of the present application determine that a first terminal device accesses a ground network provided by itself; determine at least one candidate target cell according to the neighbor relation information of itself; send a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration; receive a measurement report sent by the first terminal device for the measurement configuration, and send a switching command to the first terminal device to switch to one of the at least one candidate target cell. Since the physical resource block utilization rate of the first communication cell in the neighbor relation information is less than a preset threshold, the switching operation for the ground network or the non-ground network can be selected according to the neighbor physical resource block utilization rate, thereby reducing the switching failure probability caused by the too high load of the ground network neighbor base station, so that the network switching of the terminal device can be efficiently and accurately performed, and the stability and reliability of the communication service are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0032] Figure 1 is one of the flowcharts of the satellite-to-ground network switching method provided by the embodiments of the present application; Figure 2 is the second flowchart of the satellite-to-ground network switching method provided by the embodiments of the present application; Figure 3 is the third flowchart of the satellite-to-ground network switching method provided by the embodiments of the present application; Figure 4 FIG. 4 is a flowchart of a fourth embodiment of a method for switching a satellite-ground network provided by the present application; Figure 5 FIG. 5 is a schematic diagram of a satellite-ground cooperative networking network architecture; Figure 6 FIG. 6 is a schematic diagram of a first communication cell; Figure 7 FIG. 7 is a schematic diagram of an exemplary scenario of an embodiment of the present application; Figure 8 FIG. 8 is a schematic diagram of a first embodiment of a device for switching a satellite-ground network provided by the present application; Figure 9 FIG. 9 is a schematic diagram of a second embodiment of a device for switching a satellite-ground network provided by the present application; Figure 10 FIG. 10 is a schematic diagram of a third embodiment of a device for switching a satellite-ground network provided by the present application; Figure 11 FIG. 11 is a schematic diagram of a fourth embodiment of a device for switching a satellite-ground network provided by the present application; Figure 12 FIG. 12 is a schematic diagram of a terminal according to an embodiment of the present application; Figure 13 FIG. 13 is a schematic diagram of a network device according to an embodiment of the present application; Figure 14 FIG. 14 is a schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions, and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] Figure 1 FIG. 1 is a flowchart of a first embodiment of a method for switching a satellite-ground network provided by the present application.

[0035] With reference to Figure 1 the present application provides a method for switching a satellite-ground network, applied to a first ground network base station, which can include: Step 101, determining that a first terminal device accesses a ground network provided by itself.

[0036] The first terminal device is a user terminal device used in a satellite-ground cooperative network environment, such as a mobile phone, a tablet computer, and the like, which is a device with a communication function and can move and access a network in a ground network and non-ground network coverage area.

[0037] The first ground network base station is a base station device of a TN (Terrestrial Network) and is responsible for providing ground network communication services for cells within its coverage range. The ground network can include but is not limited to: Cellular mobile communication network: such as 5G network, 4G LTE network, etc. These networks provide extensive wireless coverage for users through ground base stations, supporting voice, data, video, and other services. For example, in cities, a large number of 5G base stations provide high-speed mobile Internet access services for users.

[0038] Wireless local area network (WLAN): commonly known as Wi-Fi network. It is usually used indoors or in small areas to provide users with convenient wireless access. For example, in homes, offices, cafes, etc., users can connect to the Internet through Wi-Fi.

[0039] After the first terminal device accesses the first ground network base station, it will face the problem of how to select and switch networks during its movement to the first communication cell.

[0040] The first communication cell is a communication cell corresponding to the same physical area as the second communication cell. The first communication cell is covered by the ground network, and the second communication cell is covered by the non-ground network. That is, there is signal coverage of TN (Terrestrial Network) and NTN (Non-Terrestrial Network) in the physical area corresponding to the first communication cell. For example, the first communication cell is a hotspot ground cell as shown in the following figure. Figure 6

[0041] The first communication cell and the second communication cell have geographical coverage overlap and are associated with each other in network switching and management, and can both provide communication services for terminal devices in the same physical area.

[0042] Among them, the non-ground network is a communication network constructed using non-ground carriers, which can include but is not limited to: Geosynchronous orbit (GEO) satellite network: GEO satellites are located about 36,000 kilometers above the Earth's equator and are relatively stationary. It can provide wide coverage and is commonly used for broadcast television signal transmission, international communication, etc. For example, some international satellite communication companies use GEO satellites to provide voice and data communication services for global users.

[0043] ​Medium Earth Orbit (MEO) satellite network: MEO satellites are typically between 5,000-12,000 kilometers in altitude. Its coverage and transmission delay are between GEO and Low Earth Orbit (LEO) satellites, commonly used for global positioning systems (such as part of the GPS satellite) and some regional communication services.

[0044] Low Earth Orbit (LEO) satellite network: LEO satellites are typically between 500-2,000 kilometers in altitude. Due to its low orbit, it has a small transmission delay and can provide high-bandwidth communication services. For example, the Starlink project provides users with global high-speed Internet access services through a large number of LEO satellites.

[0045] Step 102, determine at least one candidate target cell according to the neighbor relation information of itself.

[0046] The neighbor relation mapping table that the first ground network base station screens out and sends contains the neighbor cells of the communication cells covered by the first ground network base station.

[0047] The neighbor relation mapping table is a table maintained by the space-ground cooperation gateway, which records the adjacency relationship of each communication cell within the management range of the space-ground cooperation gateway. The information in the neighbor relation mapping table is based on the maintenance of the service area information and mapping relationship of the space-ground cooperation gateway for non-terrestrial network cells and ground network cells. Since when the PRB utilization rate of a TN cell exceeds a preset threshold (for example, 95%), the cell is in a full load state and is not suitable as a candidate cell for handover, the first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than the preset threshold. Therefore, the physical resource block utilization rate of the first communication cell in the neighbor relation information is less than the preset threshold.

[0048] In the specific implementation process, the first ground network base station receives the neighbor relation information issued by the space-ground cooperation gateway; and deploys the neighbor relation information locally.

[0049] In some embodiments, the first ground network base station also receives an update notification of the neighbor relation information from the space-ground cooperation gateway; and deploys the updated neighbor relation information locally.

[0050] The updated neighbor relation information is screened out from the updated neighbor relation mapping table and issued to the corresponding ground network base station by the space-ground cooperation gateway after receiving a triggering event for the change of the physical resource block utilization rate.

[0051] The detailed description of the triggering event and the updating of the neighbor relation mapping table can be found in the related content in Figure 4 , which will not be repeated here.

[0052] The candidate target cell is a communication cell contained in the neighbor relation information, which is a cell that the first terminal device can access in the future. The candidate target cell can be a cell corresponding to a different frequency NTN wave position in the same area coverage, or a TN cell that meets the PRB utilization rate condition.

[0053] Step 103, sending a measurement configuration carrying information of at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration.

[0054] The measurement configuration is configuration information sent by the first ground network base station to the first terminal device, which is used to guide the first terminal device to perform signal measurement and other related operations on the candidate target cell.

[0055] The measurement configuration can include but is not limited to: Cell identification information, such as physical cell identification (PCI), global cell identification (CGI), cell global identification code (E-CGI, Evolved CGI), etc.

[0056] Network type information, such as network standard identification (such as GSM, CDMA, WCDMA, TD-SCDMA, LTE, 5G NR, etc.), whether it is a non-terrestrial network (NTN) cell identification, etc.

[0057] Frequency information, such as working frequency, frequency bandwidth, etc.

[0058] Measurement threshold value, which sets the signal quality threshold for the terminal device to perform measurement reporting, such as reference signal received power (RSRP) threshold, reference signal received quality (RSRQ) threshold, signal-to-noise ratio (SINR) threshold, etc. When the terminal measures the signal quality index of the target cell to exceed the measurement threshold value, the measurement result is reported to the first ground network base station.

[0059] Measurement period, which specifies the time interval for the terminal device to perform signal measurement.

[0060] In the specific implementation process, the first ground network base station can send the measurement configuration carrying the information of the candidate target cell to the first terminal device through the SIB message (System Information Block Message, system information block message) or RRCReconfiguration (Radio Resource Control Reconfiguration) and other ways.

[0061] The first terminal device, after receiving the measurement configuration, parses it to understand the objects to be measured, measurement parameters, and reporting conditions, etc. The first terminal device measures the signals of the at least one candidate target cell received according to the configuration requirements, and obtains relevant index data. When the reporting conditions are met (for example, when the first terminal device moves to within a preset range of any candidate target cell), the first terminal device reports the measurement results to the first ground network base station through specific signaling.

[0062] Step 104, receiving the measurement report sent by the first terminal device for the measurement configuration, sending a handover command to the first terminal device to hand over to one of the at least one candidate target cell.

[0063] The measurement report is a report on the signal quality of the candidate target cell, etc. feedback by the first terminal device to the first ground network base station after measuring according to the measurement configuration.

[0064] The handover command is an instruction sent by the first ground network base station to the first terminal device after receiving the measurement report of the terminal device, instructing the first terminal device to hand over to one of the at least one candidate target cell.

[0065] After the first ground network base station receives the measurement report sent by the first terminal device for the measurement configuration, it decides whether to send a handover command to the first terminal device to hand over to the candidate target cell reported in the measurement report according to the information in the measurement report (such as the signal quality of the candidate target cell). If the measurement report shows that the signal quality of the candidate target cell meets the handover conditions, the first ground network base station will send a handover command to the terminal device, instructing the terminal device to hand over to the candidate target cell, so as to realize smooth handover of the network and continuous guarantee of communication service.

[0066] The implementation process of the above steps 101~104 is described below with specific examples.

[0067] As Figure 7As shown, the first terrestrial network base station TN gNB1 (Terrestrial Network gNodeB 1) corresponds to TN cell 1 and the first terrestrial network base station TN gNB2 (Terrestrial Network gNodeB 2) corresponds to TN cell 2, both of which are in a hotspot area. To alleviate the load pressure in the hotspot area, a non-terrestrial network beam 1 (NTN Beam 1) is scheduled for supplementary coverage, covering an NTN beam position 1 (NTN Beam Position 1), corresponding to TN cell 1 and TN cell 2. The first terrestrial network base station TN gNB3 corresponds to TN cell 3, which is in a non-hotspot area and is a neighbor of TN cell 1 and TN cell 2.

[0068] Since the physical resource block utilization rate of TN gNB1 is higher than the preset threshold value, in the neighbor relationship information received by TN gNB3 from the space-earth cooperative gateway, the neighbor of TN gNB3 includes NTN beam 1 and TN cell 2.

[0069] After terminal device UE (User Equipment) 1 and terminal device UE2 access TN cell 3, TN gNB3 determines the candidate target cells of UE1 and UE2 to be NTN beam 1 and TN cell 2 according to its own neighbor relationship information.

[0070] TN gNB3 sends a measurement configuration carrying information of NTN beam 1 and TN cell 2 to UE1 and a measurement configuration carrying information of NTN beam 1 and TN cell 2 to UE2.

[0071] UE1 performs measurement on NTN beam 1 and TN cell 2 based on the measurement threshold configuration and the measurement configuration received by it.

[0072] UE1 moves to the coverage range of TN cell 1, and when UE1 enters the preset range of TN cell 1, since the measured signal strength of NTN beam 1 meets the measurement threshold configuration, UE1 reports the measurement on NTN beam 1 to TN gNB3.

[0073] UE2 performs measurement on NTN beam 1 and TN cell 2 based on the measurement threshold configuration and the measurement configuration received by it.

[0074] UE2 moves to TN cell 2 coverage, when UE2 enters the preset range of TN cell 2, due to the measured signal strength of TN cell 2 meeting the measurement threshold configuration, the measurement report to TN gNB3 for TN cell 2 is sent.

[0075] After receiving the measurement report sent by UE1 and UE2, TN gNB3 triggers the cell switching process, sends the switching command to UE1 to switch to NTN wave bit 1, and sends the switching command to UE2 to switch to TN cell 2, finally UE1 switches to NTN wave bit 1, and UE2 switches to TN cell 2.

[0076] Figure 2 Figure 2 is a flowchart of a satellite-to-ground network switching method provided by an embodiment of the present application.

[0077] With reference to Figure 2 , the present application provides a satellite-to-ground network switching method applied to a second ground network base station, which can include: Step 201, determine that the change of the physical resource block utilization rate of itself meets the triggering condition.

[0078] In some embodiments, the triggering condition includes that the physical resource block utilization rate changes from a first value less than a preset threshold value to a second value greater than the preset threshold value, or changes from the second value to the first value, and the change remains for a preset time length.

[0079] The first value is the specific value of the measured physical resource block utilization rate at the start of the triggering condition monitoring stage, and the value is less than the pre-set threshold value. It represents the relatively low utilization state of the physical resource block at a certain time or a certain period of time. For example, the preset threshold value is 70%, when the monitoring starts, the physical resource block utilization rate is 50%, and here 50% is the first value, which indicates that there are more idle resources of the physical resource block available for allocation and use.

[0080] The second value refers to the value reached after the change of the physical resource block utilization rate, and the value is greater than the pre-set threshold value. The second value is relative to the first value, and appears in the change process meeting the triggering condition, representing the high utilization state of the physical resource block. Continue with the above example, the preset threshold value is 70%, when the physical resource block utilization rate rises from the initial 50% (first value) to 80%, and here 80% is the second value, which means that the utilization degree of the physical resource block is high at this time, and may be close to or has reached the state of system resource allocation tension.

[0081] In a specific implementation process, the second ground network base station can set a preset threshold value of PRB utilization rate according to its load capacity (such as the maximum number of active users) and its PRB utilization situation (such as PRB occupation, PRB availability, etc.). When the PRB utilization rate of the second ground network base station exceeds the threshold value, it indicates that the current second ground network base station is in a full load state, and other terminal devices cannot be switched to the current TN cell at this time.

[0082] The second ground network base station is a base station covering the first communication cell. For detailed description of the first communication cell, please refer to the related content in Figure 1 , which will not be repeated here.

[0083] Step 202, reporting the triggering event for the change of physical resource block utilization to the space-ground cooperation gateway.

[0084] When it is judged that the triggering condition is met, the second ground network base station can generate a triggering event report for the change of physical resource block utilization, and transmit the triggering event report to the space-ground cooperation gateway through the network. For example, the second ground network base station can report the triggering event to the space-ground cooperation gateway through edge OAM (Operation, Administration and Maintenance).

[0085] The triggering event report can include but is not limited to the following information: Event type, explicitly identified as a physical resource block utilization change triggering event.

[0086] Utilization change, recording the specific change value, change direction (up or down) and time point or time period of the change of physical resource block utilization.

[0087] Base station identification information, including the unique identifier (such as base station ID) of the second ground network base station, geographic location information, etc., so that the space-ground cooperation gateway can accurately identify the source of the event.

[0088] After the space-ground cooperation gateway receives the triggering event, it updates the neighbor relation mapping table, and filters the neighbor relation update information of the ground network base station from the updated neighbor relation mapping table, and issues an update notification for the neighbor relation information to the ground network base station whose neighbor relation has changed.

[0089] For detailed description of the neighbor relation mapping table, please refer to the related content in Figure 1 , which will not be repeated here.

[0090] For detailed description of the space-ground cooperation gateway updating the neighbor relation mapping table after receiving the triggering event, please refer to the related content in Figure 4 , which will not be repeated here.

[0091] Figure 3 FIG. 3 is a flowchart of a third embodiment of a method for switching a satellite-ground network provided by the present application.

[0092] With reference to Figure 3 The present application provides a method for switching a satellite-ground network, which is applied to a first terminal device and can include the following steps. Step 301: receiving a measurement configuration sent by a ground network base station, the measurement configuration carrying information of at least one candidate target cell.

[0093] For detailed description of the candidate target cell and the measurement configuration, please refer to the related content in Figure 1 , which will not be repeated here.

[0094] Step 302: performing measurement reporting on the at least one candidate target cell according to the measurement configuration and a measurement threshold configuration.

[0095] The measurement threshold configuration is a series of signal parameter thresholds and related rules preset for determining whether to trigger the measurement reporting. In a communication network, these signal parameters usually include signal strength (such as RSRP, Reference Signal Received Power), signal quality (such as RSRQ, Reference Signal Received Quality), signal-to-interference ratio (SINR), etc. The measurement threshold configuration is set according to different network scenarios, business requirements, and characteristics of the terminal device, etc.

[0096] The measurement reporting refers to the process of sending the measured relevant information (such as the identifier of the candidate target cell, the measured signal parameter value, the measurement time, etc.) to the ground network base station in a certain format and rule when the measurement result of one of the candidate target cells meets the preset triggering condition, according to the measurement threshold configuration.

[0097] When the measurement result of one of the candidate target cells by the first terminal device meets the triggering condition in the measurement threshold configuration, the terminal device will generate a measurement report. The measurement report can contain the identifier information (such as PCI) of the candidate target cell, the measured signal parameter value (such as RSRP = -85dBm), the measurement time, etc. Then, the terminal device sends the measurement report to the ground network base station in the format and manner specified by the communication protocol.

[0098] Step 303: receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to the ground network base station or non-ground network covering the candidate target cell.

[0099] Figure 4FIG. 4 is a flowchart of a fourth embodiment of a satellite-to-ground network switching method provided by the present application.

[0100] Referring to Figure 4 , the present application provides a satellite-to-ground network switching method applied to a satellite-ground cooperative gateway, which can include the following steps. Step 401: Obtain service area information of a ground network cell and service area information of a non-ground network cell within a management range of the satellite-ground cooperative gateway.

[0101] In the specific implementation process, the satellite-ground cooperative gateway needs to obtain and maintain the service area information of the non-ground network cell, the service area information of the ground network cell, and the mapping relationship between the non-ground network and the ground network within the management range thereof.

[0102] As shown in Figure 5 , the satellite-ground cooperative gateway is a network device capable of realizing protocol conversion, data routing and forwarding, and resource overall scheduling between a satellite communication network and a ground communication network, so as to realize interconnection and cooperation between the two networks.

[0103] The service area information of the non-ground network cell at least includes satellite ephemeris information, non-ground network service cell information, intra-cell wave position information, and ground network neighboring cell information.

[0104] The service area information of the ground network cell at least includes base station identification, base station location information, base station corresponding cell information (such as cell radius), non-ground network neighboring cell information (such as SSBindex, polling period and other configuration information carried by the control beam in the wave position polling process), and the like.

[0105] The mapping relationship between the non-ground network and the ground network includes service area overlap identification, neighboring cell priority ranking, and switching parameter configuration.

[0106] Step 402: Establish a neighboring cell relationship mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell.

[0107] For detailed description of the neighboring cell relationship mapping table, refer to the related content in Figure 1 , which will not be described here again.

[0108] Step 403: From the neighboring cell relationship mapping table, screen out the neighboring cell relationship information for each ground network base station, and send the neighboring cell relationship information of each ground network base station to the corresponding ground network base station.

[0109] In some embodiments, the satellite-ground cooperative gateway updates the neighbor relation mapping table after receiving the triggering event for the change in the physical resource block utilization; screens the neighbor relation update information of the ground network base station from the updated neighbor relation mapping table; and issues an update notification for the neighbor relation information to the ground network base station whose neighbor relation is changed.

[0110] The neighbor relation update information includes the updated neighbor relation information of the ground network base station whose neighbor relation is changed. For example, for Figure 7 The example described above, when the physical resource block utilization of the TN gNB1 is lower than the preset threshold value for a preset length of time, the TN gNB1 reports a triggering event for the change in the physical resource block utilization to the satellite-ground cooperative gateway. After the satellite-ground cooperative gateway receives the triggering event, the satellite-ground cooperative gateway updates the neighbor relation mapping table, changes NTN wave position 1, which is a neighbor of other communication cells in the neighbor relation mapping table, to TN cell 1, and screens the updated neighbor information of the communication cell (for example, TN cell 3) that originally takes NTN wave position 1 as a neighbor from the updated neighbor relation mapping table. And issues an update notification for the neighbor relation information to the ground network base station that originally takes NTN wave position 1 as a neighbor, for example, issues an update notification for the neighbor relation information to TN gNB3 and TN gNB6 (which originally take NTN wave position 1 as a neighbor). For detailed description of the triggering event for the change in the physical resource block utilization, see the related content in Figure 2 , which will not be repeated here.

[0111] In the specific implementation process, when the satellite-ground cooperative gateway determines that the physical resource block utilization changes from a first value to a second value and the change lasts for a preset length of time, the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells is replaced by its corresponding second communication cell. Or determines that the physical resource block utilization changes from the second value to the first value and the change lasts for a preset length of time; and replaces the second communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with its corresponding first communication cell.

[0112] For detailed description of the first value and the second value, see the related content in Figure 2 , which will not be repeated here.

[0113] For detailed description of the first communication cell and the second communication cell, see the related content in Figure 2 , which will not be repeated here.

[0114] The satellite-ground network switching device provided by the embodiments of the present application is described below. The satellite-ground network switching device described below can be mutually corresponding to the satellite-ground network switching method described above.

[0115] Figure 8 is one of structural schematic diagrams of a satellite-to-ground network switching device provided by an embodiment of the present application.

[0116] As shown in Figure 8 , the satellite-to-ground network switching device 800 is arranged at a first ground network base station and includes: A first determining module 810 is configured to determine that a first terminal device accesses a ground network provided by itself.

[0117] A second determining module 820 is configured to determine at least one candidate target cell according to neighbor relation information of itself, wherein a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network.

[0118] A sending module 830 is configured to send, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration.

[0119] A receiving module 840 is configured to receive a measurement report sent by the first terminal device for the measurement configuration, and send, to the first terminal device, a switching command for switching to one of the at least one candidate target cell.

[0120] Figure 9 is another structural schematic diagram of a satellite-to-ground network switching device provided by an embodiment of the present application.

[0121] As shown in Figure 9 , the satellite-to-ground network switching device 900 is arranged at a second ground network base station and includes: A determining module 910 is configured to determine that a physical resource block utilization of itself changes to satisfy a triggering condition.

[0122] The reporting module 920 is used to report triggering events related to changes in the utilization rate of the physical resource blocks to the satellite-ground cooperation gateway. Upon receiving the triggering event, the satellite-ground cooperation gateway updates the neighbor cell relationship mapping table, filters out the neighbor cell relationship update information of the terrestrial network base stations from the updated neighbor cell relationship mapping table, and sends an update notification regarding the neighbor cell relationship information to the terrestrial network base stations whose neighbor cell relationships have changed. The neighbor cell relationship mapping table records the adjacency relationships of each communication cell within the management range of the satellite-ground cooperation gateway. The first communication cell, recorded in the neighbor cell relationship mapping table as a neighbor of other cells, has a physical resource block utilization rate less than a preset threshold. The first communication cell corresponds to the same physical area as the second communication cell, and the first communication cell is covered by a terrestrial network, while the second communication cell is covered by a non-terrestrial network.

[0123] The second terrestrial network base station is a terrestrial network base station that covers the first communication cell.

[0124] Figure 10 This is the third schematic diagram of the satellite-to-ground network switching device provided in the embodiments of this application.

[0125] like Figure 10 As shown, the satellite-to-ground network switching device 1000 is installed in the first terminal device and includes: The receiving module 1010 is used to receive the measurement configuration carrying information about candidate target cells sent by the terrestrial network base station.

[0126] The measurement module 1020 is configured to perform measurement reporting for the at least one candidate target cell according to the measurement threshold configuration.

[0127] The handover module 1030 is used to receive a handover command sent by the terrestrial network base station to hand over to one of the at least one candidate target cells, and to initiate a network access application to the terrestrial network base station or non-terrestrial network covering the candidate target cell.

[0128] The measurement configuration is sent by the first terrestrial network base station to the first terminal device after determining that the first terminal device has accessed the terrestrial network it provides and identifying at least one candidate target cell based on its neighbor cell relationship information.

[0129] The neighbor relation information is filtered out by the space-ground cooperative gateway from a neighbor relation mapping table and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperative gateway, the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as the second communication cell, the first communication cell is covered by the ground network, and the second communication cell is covered by the non-ground network.

[0130] The switching command is sent by the ground network base station after receiving a measurement report sent by the first terminal device for the measurement configuration.

[0131] Figure 11 Figure 4 is a structural schematic diagram of a space-ground network switching device provided by an embodiment of the application.

[0132] As shown in Figure 11 The space-ground network switching device 1100 is arranged in a space-ground cooperative gateway and includes: The acquisition module 1110 is configured to acquire service area information of a ground network cell and service area information of a non-ground network cell within a management range of the space-ground cooperative gateway.

[0133] The establishment module 1120 is configured to establish a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization rate less than a preset threshold.

[0134] The sending module 1130 is configured to filter out neighbor relation information for each ground network base station from the neighbor relation mapping table and send the neighbor relation information of each ground network base station to the corresponding ground network base station, so that the ground network base station determines at least one candidate target cell according to the neighbor relation information of the ground network base station when determining that a first terminal device accesses a ground network provided by the ground network base station, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and sends a switching command to switch to one of the at least one candidate target cell to the first terminal device after receiving a measurement report sent by the first terminal device for the measurement configuration.

[0135] The terminal referred to in the embodiments of the present application can be a device that provides voice and / or data connectivity for a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem, etc. In different systems, the names of terminal devices can also be different, for example, in a 5G system, the terminal device can be referred to as a user equipment (UE).

[0136] The network device referred to in the embodiments of the present application can be a base station, which can include a plurality of cells serving terminals. According to different application occasions, the base station can also be referred to as an access point, or can be a device in an access network that communicates with a wireless terminal device through one or more sectors over an air interface, or other names.

[0137] Figure 12 For a structural schematic diagram of a terminal according to the embodiments of the present application, refer to Figure 12 The embodiments of the present application also provide a terminal, which can include a memory 1210, a transceiver 1220, and a processor 1230. The memory 1210 is configured to store a computer program; the transceiver 1220 is configured to transceive data under the control of the processor 1230; and the processor 1230 is configured to read the computer program in the memory 1210 and perform the following operations: receiving a measurement configuration sent by a ground network base station and carrying information of a candidate target cell; performing measurement reporting on the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to a ground network base station covering the candidate target cell or a non-ground network; wherein the measurement configuration is sent to the first terminal device by the first ground network base station after determining that the first terminal device accesses the ground network provided by the first ground network base station, determining at least one candidate target cell according to its own neighbor relation information; wherein the neighbor relation information is filtered out by a star-ground cooperative gateway from a neighbor relation mapping table and sent to the ground network base station, the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the star-ground cooperative gateway, the first communication cell recorded in the neighbor relation mapping table as the neighbor cell of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as the second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein the handover command is sent by the ground network base station after receiving the measurement report sent by the first terminal device for the measurement configuration.

[0138] Wherein, in Figure 12In particular embodiments, the bus architecture can include any number of interconnecting buses and bridges, and the various circuitry representative of the processor 1230 and the memory 1210, for example, can be linked through various busses and bridges to each other in the bus architecture. The bus architecture can also include various other circuitry that can be desired in a bus implementation as well, which is all conventionally known, and therefore, need not be further described herein. The bus interface provides an interface to the transceiver 1220. The transceiver 1220 can be a plurality of elements, including a transmitter and a receiver, for communicating with various other apparatus over a transmission medium. The user interface 1240 can also be an interface to external devices, for example, for enabling a user to interact with the apparatus.

[0139] The processor 1230 is responsible for managing the bus architecture and general processing, and the memory 1210 can store data used by the processor 1230 in executing its operations.

[0140] The processor 1230 is responsible for managing the bus architecture and general processing, and the memory 1210 can store data used by the processor 1230 in executing its operations.

[0141] Figure 13 For the structure of the network device according to the embodiments of the present application, refer to Figure 13 The embodiments of the present application also provide a network device, which can include a memory 1310, a transceiver 1320 and a processor 1330. The memory 1310 is configured to store a computer program; the transceiver 1320 is configured to transceive data under the control of the processor 1330; and the processor 1330 is configured to read the computer program in the memory 1310 and perform the following operations: determining that a first terminal device accesses a ground network provided by itself; determining at least one candidate target cell according to a neighbor relation information of itself; wherein a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by the ground network, and the second communication cell is covered by a non-ground network; sending, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration; receiving a measurement report sent by the first terminal device for the measurement configuration, and sending, to the first terminal device, a handover command for handover to one of the at least one candidate target cell; or receiving a measurement configuration carrying information of candidate target cells sent by a ground network base station; performing measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to a ground network base station or a non-ground network covering the candidate target cell; wherein the measurement configuration is sent to the first terminal device by the first ground network base station after determining that the first terminal device accesses a ground network provided by the first ground network base station, determining at least one candidate target cell according to its own neighbor relation information, wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a space-ground cooperative gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein the handover command is sent by the ground network base station after receiving the measurement report sent by the first terminal device for the measurement configuration; or obtaining service area information of a ground network cell and service area information of a non-ground network cell within its own management range; establishing a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; wherein the neighbor relation mapping table records the adjacency relation of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; filtering out neighbor relation information for each ground network base station from the neighbor relation mapping table, and sending the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when determining that a first terminal device accesses a ground network provided by the ground network base station, the ground network base station determines at least one candidate target cell according to its own neighbor relation information, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving a measurement report sent by the first terminal device for the measurement configuration, sends a handover command to hand over to one of the at least one candidate target cell to the first terminal device.

[0142] wherein, in Figure 13In particular embodiments, the bus architecture can include any number of interconnecting buses and bridges, and the various circuitry representative of the processor(s) 1330 and the memory 1310 that can be linked together by the bus architecture. The bus architecture can also link various other circuitry, which is well known, such as, for example, peripheral devices, voltage regulators, power management circuitry, and the like, thus, the further description herein will not be further described. The bus interface provides an interface. The transceiver 1320 can be a plurality of elements, including a transmitter and a receiver, that provide a means of communicating with various other apparatus over a transmission medium. The processor 1330 is responsible for managing the bus architecture and generally carrying out the processing functions, and the memory 1310 can store the data used by the processor 1330 in executing its operations.

[0143] Optionally, the processor 1330 is further configured to perform the following operations: In one embodiment, the method further comprises: receiving the neighboring cell relationship information issued by the space-earth cooperative gateway; wherein the neighboring cell relationship information is filtered out from a neighboring cell relationship mapping table by the space-earth cooperative gateway, the neighboring cell relationship mapping table records the adjacency relationship of each communication cell within the management range of the space-earth cooperative gateway, and the first communication cell recorded in the neighboring cell relationship mapping table as a neighboring cell of other cells has a physical resource block utilization rate less than a preset threshold; and deploying the neighboring cell relationship information locally.

[0144] In one embodiment, the method further comprises: receiving an update notification of the neighboring cell relationship information by the space-earth cooperative gateway; and deploying the updated neighboring cell relationship information locally; wherein the updated neighboring cell relationship information is filtered out from the updated neighboring cell relationship mapping table by the space-earth cooperative gateway after receiving a triggering event of a change in the physical resource block utilization rate; and wherein the triggering event is reported to the space-earth cooperative gateway by a ground network base station covering the first communication cell after determining that the change in the physical resource block utilization rate satisfies a triggering condition.

[0145] In one embodiment, the triggering condition includes a change in the physical resource block utilization rate from a first value less than a preset threshold to a second value greater than the preset threshold, or from the second value to the first value, and the change is maintained for a preset duration.

[0146] Alternatively, In one embodiment, the triggering condition includes a change in the physical resource block utilization rate from a first value less than a preset threshold to a second value greater than the preset threshold, or from the second value to the first value, and the change is maintained for a preset duration.

[0147] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the first value to the second value, and the change maintains for a preset time length; replacing the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding second communication cell.

[0148] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the second value to the first value, and the change maintains for a preset time length; replacing the second communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding first communication cell.

[0149] Or, In one embodiment, the method further comprises: receiving a triggering event for the change of the physical resource block utilization rate; updating the neighbor relation mapping table; and issuing an update notification for the neighbor relation mapping table to the ground network base stations within the self-managed range; wherein the triggering event is that the ground network base station covering the first communication cell determines that the change of the physical resource block utilization rate satisfies a triggering condition and reports to the space-ground cooperation gateway.

[0150] In one embodiment, the triggering condition comprises that the physical resource block utilization rate changes from a first value less than a preset threshold value to a second value greater than the preset threshold value, or changes from the second value to the first value, and the change maintains for a preset time length.

[0151] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the first value to the second value, and the change maintains for a preset time length; replacing the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding second communication cell.

[0152] In one embodiment, the updating the neighbor relation mapping table comprises: determining that the physical resource block utilization rate changes from the second value to the first value, and the change maintains for a preset time length; replacing the second communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding first communication cell.

[0153] In one embodiment, the service area information of the non-ground network cell at least comprises satellite ephemeris information, non-ground network service cell information, intra-cell wave position information, and ground network neighbor cell information; and the service area information of the ground network cell at least comprises base station identification, base station location information, base station corresponding cell information, and non-ground network neighbor cell information.

[0154] It should be noted that the terminal and network device provided in this application embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0155] Figure 14 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 14 As shown, the electronic device may include: a processor 1410, a communication interface 1420, a memory 1430, and a communication bus 1440, wherein the processor 1410, the communication interface 1420, and the memory 1430 communicate with each other via the communication bus 1440. The processor 1410 can call a computer program in the memory 1430 to execute the steps of the satellite-to-ground network handover method, such as including: The system determines that the first terminal device is connected to its own terrestrial network; based on its neighbor cell relationship information, it identifies at least one candidate target cell; wherein the physical resource block utilization rate of the first communication cell in the neighbor cell relationship information is less than a preset threshold, the first communication cell is a communication cell in the same physical area as the second communication cell, the first communication cell is covered by the terrestrial network, and the second communication cell is covered by a non-terrestrial network; it sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device can perform measurement reporting based on the measurement configuration; upon receiving the measurement report sent by the first terminal device for the measurement configuration, it sends a handover command to the first terminal device to switch to one of the candidate target cells of the at least one candidate target cell; or, receive a measurement configuration carrying information of candidate target cells sent by a ground network base station; perform measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receive a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiate a network access application to a ground network base station or a non-ground network covering the candidate target cell; wherein the measurement configuration is sent to the first terminal device by the first ground network base station after determining that the first terminal device accesses a ground network provided by the first ground network base station, determining at least one candidate target cell according to its own neighbor relation information, wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a space-ground cooperative gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as the second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein the handover command is sent by the ground network base station after receiving the measurement report sent by the first terminal device for the measurement configuration; or obtain service area information of a ground network cell and service area information of a non-ground network cell within its own management range; establish a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; wherein the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold; from the neighbor relation mapping table, filter out the neighbor relation information for each ground network base station, and send the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when the each ground network base station determines that the first terminal device accesses a ground network provided by itself, it determines at least one candidate target cell according to its own neighbor relation information, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving the measurement report sent by the first terminal device for the measurement configuration, sends a handover command to hand over to one of the at least one candidate target cell to the first terminal device.

[0156] Further, the logic instructions in the memory 1430 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0157] In another aspect, the embodiments of the present application also provide a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the steps of the satellite-ground network switching method provided by the above-mentioned embodiments, for example, including: determining that a first terminal device accesses a ground network provided by itself; determining at least one candidate target cell according to its own neighbor relation information, wherein the physical resource block utilization rate of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by the ground network, and the second communication cell is covered by a non-ground network; sending a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration; receiving a measurement report sent by the first terminal device for the measurement configuration, and sending a handover command to the first terminal device to hand over to one of the at least one candidate target cell; or, receiving a measurement configuration carrying information of candidate target cells sent by a ground network base station; performing measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to a ground network base station or a non-ground network covering the candidate target cell; wherein the measurement configuration is sent to the first terminal device by the first ground network base station after determining that the first terminal device accesses a ground network provided by the first ground network base station, determining at least one candidate target cell according to its own neighbor relation information, wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a space-ground cooperative gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein the handover command is sent by the ground network base station after receiving the measurement report sent by the first terminal device for the measurement configuration; or obtaining service area information of a ground network cell and service area information of a non-ground network cell within its own management range; establishing a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell; wherein the neighbor relation mapping table records the adjacency relation of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; filtering out neighbor relation information for each ground network base station from the neighbor relation mapping table, and sending the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when determining that a first terminal device accesses a ground network provided by the ground network base station, the ground network base station determines at least one candidate target cell according to its own neighbor relation information, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving a measurement report sent by the first terminal device for the measurement configuration, sends a handover command to hand over to one of the at least one candidate target cell to the first terminal device.

[0158] In another aspect, an embodiment of the present application also provides a processor-readable storage medium storing a computer program for causing a processor to perform the steps of the method provided by any of the above embodiments, for example comprising: determining that the first terminal device accesses a terrestrial network provided by the first terminal device; determining at least one candidate target cell according to the neighbor relation information of the first terminal device; wherein a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by the terrestrial network, and the second communication cell is covered by a non-terrestrial network; sending, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration; receiving a measurement report sent by the first terminal device for the measurement configuration, and sending, to the first terminal device, a handover command for switching to one of the at least one candidate target cell; or receiving a measurement configuration carrying information of a candidate target cell sent by a terrestrial network base station; performing measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receiving a handover command sent by the terrestrial network base station for switching to one of the at least one candidate target cell, and initiating a network access application to a terrestrial network base station covering the candidate target cell or a non-terrestrial network; wherein the measurement configuration is sent by the first terminal device to the first terminal device after the first terminal device determines that the first terminal device accesses a terrestrial network provided by the first terminal device, and determines at least one candidate target cell according to the neighbor relation information of the first terminal device; wherein the neighbor relation information is filtered out by a star-ground cooperative gateway from a neighbor relation mapping table and sent to the terrestrial network base station, the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the star-ground cooperative gateway, the first communication cell recorded in the neighbor relation mapping table as the neighbor cell of other cells has a physical resource block utilization less than a preset threshold; the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by a terrestrial network, and the second communication cell is covered by a non-terrestrial network; or obtaining service area information of a terrestrial network cell and service area information of a non-terrestrial network cell within a management range of the first terminal device; According to the service area information of the ground network cell and the service area information of the non-ground network cell, a neighbor relation mapping table is established; wherein the neighbor relation mapping table records the adjacent relation of each communication cell in the range managed by the star-ground cooperation gateway, and the first communication cell recorded in the neighbor relation mapping table as the neighbor cell of other cell has a physical resource block utilization rate less than a preset threshold; from the neighbor relation mapping table, the neighbor relation information for each ground network base station is screened out, and the neighbor relation information of each ground network base station is sent to the corresponding ground network base station, so that when the first terminal device accesses the ground network provided by the ground network base station, according to the neighbor relation information of the ground network base station, at least one candidate target cell is determined, the first terminal device is sent the measurement configuration carrying the information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving the measurement report of the first terminal device for the measurement configuration, the first terminal device is sent the handover command to hand over to one of the at least one candidate target cell.

[0159] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to a magnetic storage (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical storage (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a NAND FLASH, a solid state disk (SSD)), etc.

[0160] The device embodiments described above are only schematic, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0161] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0162] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements for some of the technical features therein. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A satellite-to-ground network switching method, characterized by, The application is applied to a first ground network base station, comprising: determining that a first terminal device accesses a ground network provided by itself; determining at least one candidate target cell according to the neighbor relation information of itself; wherein the physical resource block utilization rate of a first communication cell in the neighbor relation information is less than a preset threshold value, the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; sending a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration; receiving a measurement report sent by the first terminal device for the measurement configuration, and sending a handover command to the first terminal device to hand over to one of the at least one candidate target cell. 2.The satellite-to-ground network switching method of claim 1, wherein, The method further comprises: receiving the neighbor relation information issued by a space-ground cooperative gateway; wherein the neighbor relation information is filtered out by the space-ground cooperative gateway from a neighbor relation mapping table, the neighbor relation mapping table records the adjacency relationship of each communication cell within the management range of the space-ground cooperative gateway, and the physical resource block utilization rate of the first communication cell recorded as the neighbor cell of other cells in the neighbor relation mapping table is less than a preset threshold value; deploying the neighbor relation information locally. 3.The satellite-to-ground network switching method of claim 2, wherein, The method further comprises: receiving an update notification of the neighbor relation information from the space-ground cooperative gateway; deploying the updated neighbor relation information locally; wherein the updated neighbor relation information is filtered out from the updated neighbor relation mapping table after the space-ground cooperative gateway receives a triggering event of the change of the physical resource block utilization rate and updates the neighbor relation mapping table; wherein the triggering event is reported to the space-ground cooperative gateway after the ground network base station covering the first communication cell determines that the change of the physical resource block utilization rate meets the triggering condition.

4. The satellite network switching method of claim 3, wherein, The triggering condition includes that the physical resource block utilization rate changes from a first value less than a preset threshold value to a second value greater than the preset threshold value, or changes from the second value to the first value, and the change remains for a preset time length.

5. A satellite-to-ground network switching method, characterized by, The application is applied to a second ground network base station, comprising: determining that the physical resource block utilization rate of itself changes to meet a triggering condition; reporting a triggering event for the physical resource block utilization rate change to a space-ground cooperative gateway; wherein, after receiving the triggering event, the space-ground cooperative gateway updates a neighbor relation mapping table, and screens out neighbor relation update information of a ground network base station from the updated neighbor relation mapping table, and sends an update notification for the neighbor relation information to the ground network base station whose neighbor relation is changed; wherein, the neighbor relation mapping table records the neighbor relation of each communication cell within the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network. The second ground network base station is a ground network base station covering the first communication cell.

6. The satellite-to-ground network switching method of claim 5, wherein, The triggering condition includes: The triggering condition includes that the physical resource block utilization rate changes from a first value less than a preset threshold to a second value greater than the preset threshold, or changes from the second value to the first value, and the change remains for a preset time length.

7. The satellite-to-ground network switching method of claim 6, wherein, The updating of the neighbor relation mapping table includes: Determining that the physical resource block utilization rate changes from the first value to the second value, and the change remains for a preset time length; Replacing the first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with its corresponding second communication cell. 8.The satellite-to-ground network switching method of claim 6, wherein, The updating of the neighbor relation mapping table includes: Determining that the physical resource block utilization rate changes from the second value to the first value, and the change remains for a preset time length; Replacing the second communication cell recorded in the neighbor relation mapping table as a neighbor of other cells with its corresponding first communication cell.

9. A satellite-to-ground network switching method, characterized by, Applied to a first terminal device, comprising: Receiving a measurement configuration sent by a ground network base station, the measurement configuration carrying information of at least one candidate target cell; According to the measurement threshold configuration, performing measurement reporting on the at least one candidate target cell according to the measurement configuration; Receiving a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiating a network access application to a ground network base station covering the candidate target cell or a non-ground network; The measurement configuration is sent by the first ground network base station to the first terminal device after determining that the first terminal device accesses the ground network provided by the first ground network base station, and determining at least one candidate target cell according to the neighbor relation information of the first ground network base station. The neighbor relation information is filtered out from a neighbor relation mapping table by the space-ground cooperative gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as the second communication cell, the first communication cell is covered by the ground network, and the second communication cell is covered by the non-ground network. The switching command is sent by the ground network base station after receiving a measurement report sent by the first terminal device for the measurement configuration.

10. A satellite-to-ground network switching method, characterized by, The space-ground cooperative gateway comprises: Obtain the service area information of the ground network cell and the service area information of the non-ground network cell in the management range of the space-ground cooperative gateway; According to the service area information of the ground network cell and the service area information of the non-ground network cell, a neighbor relation mapping table is established; wherein the neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperative gateway, and the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of another cell has a physical resource block utilization rate less than a preset threshold; From the neighbor relation mapping table, the neighbor relation information for each ground network base station is filtered out, and the neighbor relation information of each ground network base station is sent to the corresponding ground network base station, so that when the first terminal device accesses the ground network provided by the ground network base station, the ground network base station determines at least one candidate target cell according to the neighbor relation information of the ground network base station, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving the measurement report sent by the first terminal device for the measurement configuration, sends a switching command to the first terminal device to switch to one of the at least one candidate target cell.

11. The satellite-to-ground network switching method of claim 10, wherein, The method further comprises: Receiving a triggering event for the change of physical resource block utilization rate; Updating the neighbor relation mapping table; Filtering out the neighbor relation update information of the ground network base station from the updated neighbor relation mapping table; Sending an update notification for the neighbor relation information to the ground network base station whose neighbor relation has changed; The triggering event is reported to the space-ground cooperative gateway by the ground network base station covering the first communication cell when it determines that the change of physical resource block utilization rate meets the triggering condition.

12. The satellite-to-ground network switching method of claim 11, wherein, The triggering condition includes that the physical resource block utilization rate changes from a first value less than a preset threshold to a second value greater than the preset threshold, or changes from the second value to the first value, and the change remains for a preset time length.

13. The satellite-to-ground network switching method of claim 12, wherein, The updating of the neighbor relation mapping table comprises: Determining that the physical resource block utilization rate changes from the first value to the second value, and the change remains for a preset time length; replace the first communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding second communication cell.

14. The satellite-to-ground network switching method of claim 12, wherein, The updating the neighbor relation mapping table comprises: determining that the physical resource block utilization changes from the second value to the first value, and the change remains for a preset time length; replace the second communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells with the corresponding first communication cell.

15. The satellite-to-ground network switching method of any one of claims 10 to 14, characterized in that, The service area information of the non-terrestrial network cell at least comprises satellite ephemeris information, non-terrestrial network serving cell information, intra-cell wave position information, and terrestrial network neighbor cell information. The service area information of the terrestrial network cell at least comprises base station identification, base station location information, base station corresponding cell information, and non-terrestrial network neighbor cell information.

16. A satellite-to-ground network switching apparatus, characterized by comprising: The first terrestrial network base station comprises: a first determination module configured to determine that a first terminal device accesses a terrestrial network provided by the first terrestrial network base station; a second determination module configured to determine at least one candidate target cell according to neighbor relation information of the first terrestrial network base station; wherein a physical resource block utilization of a first communication cell in the neighbor relation information is less than a preset threshold value, the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by a terrestrial network, and the second communication cell is covered by a non-terrestrial network; a sending module configured to send, to the first terminal device, a measurement configuration carrying information of the at least one candidate target cell, so that the first terminal device performs measurement reporting based on the measurement configuration; a receiving module configured to receive a measurement report for the measurement configuration sent by the first terminal device, and send a handover command to the first terminal device to hand over to one of the at least one candidate target cell.

17. A satellite-to-ground network switching apparatus, characterized by comprising: The second terrestrial network base station comprises: a determination module configured to determine that a physical resource block utilization of the second terrestrial network base station changes to satisfy a triggering condition; a reporting module configured to report a triggering event for the change of the physical resource block utilization to a space-earth cooperation gateway; wherein after receiving the triggering event, the space-earth cooperation gateway updates a neighbor relation mapping table, filters out neighbor relation update information of the terrestrial network base station from the updated neighbor relation mapping table, and sends an update notification for the neighbor relation information to the terrestrial network base station whose neighbor relation is changed; the neighbor relation mapping table records a neighboring relation of each communication cell within a management range of the space-earth cooperation gateway, a first communication cell recorded in the neighbor relation mapping table as a neighbor cell of other cells has a physical resource block utilization less than a preset threshold value; the first communication cell is a communication cell corresponding to a same physical area as a second communication cell, the first communication cell is covered by a terrestrial network, and the second communication cell is covered by a non-terrestrial network; wherein the second terrestrial network base station is a terrestrial network base station covering the first communication cell.

18. A satellite-to-ground network switching apparatus, characterized by comprising: The first terminal device comprises: a receiving module configured to receive a measurement configuration carrying information of a candidate target cell sent by a terrestrial network base station; The measurement module is configured to perform measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; The switching module is configured to receive a switching command sent by the ground network base station to switch to one of the at least one candidate target cell, and initiate a network access application to the ground network base station or non-ground network covering the candidate target cell; The measurement configuration is determined by the first ground network base station, and is sent to the first terminal device after the first ground network base station determines that the first terminal device accesses the ground network provided by the first ground network base station, determines at least one candidate target cell according to the neighbor relation information of the first ground network base station, and determines at least one candidate target cell according to the neighbor relation information of the first ground network base station. The neighbor relation information is filtered out from a neighbor relation mapping table by the space-ground cooperation gateway and sent to the ground network base station. The neighbor relation mapping table records the adjacent relationship of each communication cell in the management range of the space-ground cooperation gateway. The first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold. The first communication cell is a communication cell corresponding to the same physical area as the second communication cell. The first communication cell is covered by the ground network, and the second communication cell is covered by the non-ground network. The switching command is sent by the ground network base station after the ground network base station receives the measurement report for the measurement configuration sent by the first terminal device.

19. A satellite-to-ground network switching apparatus, characterized by comprising: The space-ground cooperation gateway comprises: The acquisition module is configured to acquire service area information of a ground network cell and service area information of a non-ground network cell in the management range of the space-ground cooperation gateway; The establishment module is configured to establish a neighbor relation mapping table according to the service area information of the ground network cell and the service area information of the non-ground network cell. The neighbor relation mapping table records the adjacent relationship of each communication cell in the management range of the space-ground cooperation gateway. The first communication cell recorded in the neighbor relation mapping table as the neighbor of other cells has a physical resource block utilization rate less than a preset threshold. The sending module is configured to filter out neighbor relation information for each ground network base station from the neighbor relation mapping table, and send the neighbor relation information of each ground network base station to the corresponding ground network base station, so that when the first terminal device accesses the ground network provided by the first ground network base station, the first ground network base station determines at least one candidate target cell according to the neighbor relation information of the first ground network base station, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving the measurement report for the measurement configuration sent by the first terminal device, sends a switching command to the first terminal device to switch to one of the at least one candidate target cell.

20. A terminal, characterized by The memory is configured to store computer programs; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer programs in the memory and perform the following operations: The memory is configured to store computer programs; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer programs in the memory and perform the following operations: receive a measurement configuration carrying information of candidate target cells sent by a ground network base station; perform measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receive a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiate a network access application to a ground network base station covering the candidate target cell or a non-ground network; wherein the measurement configuration is sent to the first terminal device by the first ground network base station after determining that the first terminal device accesses a ground network provided by the first ground network base station, and determining at least one candidate target cell according to its own neighbor relation information; wherein the neighbor relation information is filtered out from a neighbor relation mapping table by a space-ground cooperation gateway and sent to the ground network base station, the neighbor relation mapping table records the adjacency relation of each communication cell within the management range of the space-ground cooperation gateway, the first communication cell recorded in the neighbor relation mapping table as the neighbor cell of other cells has a physical resource block utilization rate less than a preset threshold; the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; wherein the handover command is sent by the ground network base station after receiving a measurement report for the measurement configuration sent by the first terminal device.

21. A network device, comprising: comprising a memory, a transceiver, and a processor; the memory is used to store a computer program; the transceiver is used to transceive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations: determine that a first terminal device accesses a ground network provided by the first terminal device; determine at least one candidate target cell according to its own neighbor relation information; wherein the physical resource block utilization rate of the first communication cell in the neighbor relation information is less than a preset threshold, the first communication cell is a communication cell corresponding to the same physical area as a second communication cell, the first communication cell is covered by a ground network, and the second communication cell is covered by a non-ground network; send a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration; receive a measurement report for the measurement configuration sent by the first terminal device, and send a handover command to the first terminal device to hand over to one of the at least one candidate target cell; or receive a measurement configuration carrying information of candidate target cells sent by a ground network base station; perform measurement reporting for the at least one candidate target cell according to the measurement configuration in accordance with a measurement threshold configuration; receive a handover command sent by the ground network base station to hand over to one of the at least one candidate target cell, and initiate a network access application to a ground network base station covering the candidate target cell or a non-ground network; The measurement configuration is sent by the first ground network base station to the first terminal device after the first ground network base station determines at least one candidate target cell according to the own neighbor relation information when determining that the first terminal device accesses the ground network provided by the first ground network base station. The neighbor relation information is filtered out from a neighbor relation mapping table by the space-ground cooperation gateway and sent to the ground network base station. The neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperation gateway. The first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold. The first communication cell is a communication cell corresponding to the same physical area as the second communication cell. The first communication cell is covered by the ground network, and the second communication cell is covered by the non-ground network. The handover command is sent by the ground network base station after the ground network base station receives the measurement report sent by the first terminal device for the measurement configuration. Or, Obtain the service area information of the ground network cells and the service area information of the non-ground network cells in the management range of the space-ground cooperation gateway. According to the service area information of the ground network cells and the service area information of the non-ground network cells, a neighbor relation mapping table is established. The neighbor relation mapping table records the adjacency relation of each communication cell in the management range of the space-ground cooperation gateway. The first communication cell recorded in the neighbor relation mapping table as a neighbor of other cells has a physical resource block utilization rate less than a preset threshold. From the neighbor relation mapping table, the neighbor relation information for each ground network base station is filtered out and sent to the corresponding ground network base station, so that when the ground network base station determines that the first terminal device accesses the ground network provided by the ground network base station, the ground network base station determines at least one candidate target cell according to the own neighbor relation information, sends a measurement configuration carrying information of the at least one candidate target cell to the first terminal device, so that the first terminal device performs measurement reporting based on the measurement configuration, and after receiving the measurement report sent by the first terminal device for the measurement configuration, sends a handover command to the first terminal device to hand over to one of the at least one candidate target cell.

22. An electronic device comprising a processor and a memory having a computer program stored therein, characterized in that The processor executes the computer program to implement the steps of the space-ground network handover method of any one of claims 1 to 4, or the steps of the space-ground network handover method of any one of claims 5 to 8, or the steps of the space-ground network handover method of claim 9, or the steps of the space-ground network handover method of any one of claims 10 to 15. 23.A non-transitory computer-readable storage medium having stored thereon a computer program. The computer program is executed by the processor to implement the space-ground network handover method of any one of claims 1 to 15.

24. A computer program product comprising a computer program, characterized in that, The computer program, when executed by a processor, implements the steps of the satellite-to-ground network switching method according to any one of claims 1 to 4, or implements the steps of the satellite-to-ground network switching method according to any one of claims 5 to 8, or implements the steps of the satellite-to-ground network switching method according to claim 9, or implements the steps of the satellite-to-ground network switching method according to any one of claims 10 to 15.

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