Cooperative switching method, device, equipment, medium and product

Abstract

The invention discloses a collaborative switching method, device and equipment, a medium and a product. The method comprises the following steps: judging a switching type according to first information; initiating a switching process corresponding to the switching type; wherein the switching type comprises at least one of the following types: coupled feed switching and independent switching; the coupled feed switching is used for indicating a coupled feed link switching process in a satellite-ground cooperative control network element switching process; the independent switching is used for indicating that only a satellite-ground cooperative control network element switching process or a feed link switching process is executed; according to the invention, the coordination problem of satellite-ground coordination control network element switching and feed link switching can be effectively solved, service interruption caused by conflicts in the switching process is avoided, and the satellite-ground coordination control network element can provide continuous wide-area satellite-ground coordination service in a low-orbit satellite moving scene.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a cooperative handover method, apparatus, device, medium, and product. Background Technology

[0002] In satellite mobile communication scenarios, the feeder link between the satellite and the ground gateway station is the core channel for realizing satellite-to-ground data transmission. However, due to the high-speed movement of low-Earth orbit satellites, the visible window between the satellite and the ground gateway station is short, typically lasting only a few minutes. When the satellite is about to exceed the communication angular range of the current gateway station, the system needs to trigger a feeder link handover, switching the connection to a gateway station in another coverage area to ensure service continuity. Simultaneously, the satellite-to-ground cooperative control network element (also known as the satellite-to-ground cooperative gateway / network element) is deployed on the ground and connected to non-terrestrial network (NTN) base stations or network management systems, and terrestrial network (TN) network management systems or base stations. It is responsible for mobility policies, interference coordination, and resource scheduling between the satellite network and the terrestrial network. The service range of this satellite-to-ground cooperative control network element is usually related to the coverage area of ​​the gateway station. When satellite movement causes a feeder link handover, if the service boundary of the satellite-to-ground cooperative control network element coincides with the gateway station's handover boundary, the feeder link handover will simultaneously trigger a handover between the satellite-to-ground cooperative control network elements. If the service areas of the two are inconsistent, the change in coverage area caused by satellite movement may independently trigger the handover of satellite-ground cooperative control network elements.

[0003] However, in the existing technology, the handover process between satellite-ground cooperative control network elements is not perfect. The handover process of satellite-ground cooperative control network elements does not fully consider the relationship between them and the power supply link handover. For example, when the handover boundaries of the two are consistent, the two handover processes may overlap and cause conflicts. Depending on the timing of the overlap, it may cause communication interruption or resource conflict, resulting in service interruption of satellite-ground cooperative control network elements. Summary of the Invention

[0004] To address the problems existing in the prior art, embodiments of the present invention provide a collaborative switching method, apparatus, device, medium, and product, which can effectively solve the coordination problem of switching between satellite-ground cooperative control network elements and power supply link switching, avoid service interruptions caused by conflicts during the switching process, and ensure that satellite-ground cooperative control network elements can provide continuous wide-area satellite-ground cooperative services in low-orbit satellite mobile scenarios.

[0005] In a first aspect, embodiments of the present invention provide a cooperative handover method, applied to a first network device, comprising:

[0006] Determine the switching type based on the first piece of information;

[0007] Initiate a switching process corresponding to the switching type;

[0008] The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

[0009] As an improvement to the above scheme, the switching process corresponding to the coupling power supply switching indicates that when the target power supply link is established, the first network device initiates the link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0010] The independent handover includes a first independent handover that indicates only the handover process of the satellite-ground cooperative control network element handover and a second independent handover that indicates only the handover process of the power supply link handover.

[0011] The handover process corresponding to the first independent handover indicates that, after the handover preparation process is completed, the first network device autonomously initiates a link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0012] As an improvement to the above solution, the first information includes at least one of the following:

[0013] The first indication information sent in advance by the satellite associated with the first network device; wherein, the first indication information is used to indicate that the first network device is about to undergo a power supply link switch, and the first indication information carries the switch time of the power supply link;

[0014] The satellite's ephemeris prediction information;

[0015] The satellite's service wavelength prediction information;

[0016] The elevation angle range of the source gateway station connected to the satellite;

[0017] Service range of source-space-ground collaborative control network elements.

[0018] As an improvement to the above solution, the step of determining the switching type based on the first information includes:

[0019] Based on at least one of the following information: the ephemeris prediction information, the service wavelength prediction information, the elevation angle range of the source gateway station, the elevation angle range of the target gateway station, and the power supply link switching time, determine whether to trigger a power supply link switching; or, determine whether to trigger a power supply link switching upon receiving the first indication information.

[0020] Based on at least one of the following information: ephemeris prediction information, service wave position prediction information, service range of the source satellite-ground cooperative control network element, and elevation angle range of the target satellite-ground cooperative control network element, determine whether to trigger satellite-ground cooperative control network element handover.

[0021] When both power supply link switching and satellite-to-ground cooperative control network element switching are triggered simultaneously, the switching type is determined to be coupled power supply switching.

[0022] In the case where only the satellite-ground cooperative control network element handover is triggered, the handover type is determined to be the first independent handover;

[0023] If only the power supply link is switched, the switching type is determined to be the second independent switching.

[0024] As an improvement to the above scheme, the switching process corresponding to the coupling feed switching includes:

[0025] Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type;

[0026] Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete;

[0027] Receive a second message sent by the satellite; wherein the second message is used to indicate that the target feed link has been successfully established;

[0028] Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element;

[0029] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0030] As an improvement to the above scheme, the second message is triggered after the target power supply link between the satellite and the target gateway station is established;

[0031] The target power supply link is established after the handover preparation process is completed and is released after the connection between the target satellite-ground cooperative control network element and the first network device is successfully established.

[0032] Alternatively, the target power supply link is established after the source power supply link is released, and the source power supply link is released after the handover preparation process is completed.

[0033] As an improvement to the above scheme, the switching process corresponding to the first independent switching includes:

[0034] Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type;

[0035] Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete;

[0036] Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element;

[0037] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0038] As an improvement to the above scheme, the interface link resources between the source-space-ground cooperative control network element and the first network element device are released in at least one of the following ways:

[0039] The target satellite-ground cooperative control network element instructs the source satellite-ground cooperative control network element to release the interface link resources of the first network element device through the second indication information; wherein, the second indication information is sent by the target satellite-ground cooperative control network element to the source satellite-ground cooperative control network element after sending the third message;

[0040] The source-satellite-ground collaborative control network element actively releases the interface link resources of the first network element device when the timer expires; wherein, the timer is started by the source-satellite-ground collaborative control network element when sending the fourth message; wherein, the fourth message is used to indicate that the second message was successfully handed over.

[0041] As an improvement to the above solution, the method further includes:

[0042] Upon receiving the third message, the interface link resources of the source-satellite-ground cooperative control network element are actively released.

[0043] As an improvement to the above scheme, during the handover preparation process, the source satellite-ground cooperative control network element transfers the second information to the target satellite-ground cooperative control network element associated with the next service area, so that the target satellite-ground cooperative control network element performs satellite-ground resource collaborative allocation function according to the second information.

[0044] As an improvement to the above scheme, during the link establishment process, the target satellite-ground cooperative control network element establishes a connection with the first network device and saves the context information of the first network device and the satellite associated with the first network device.

[0045] As an improvement to the above solution, the second request includes third information; the third information includes: first identification information of the first network device and second identification information of the satellite associated with the first network device.

[0046] As an improvement to the above scheme, the second information includes: the first identification information, operating mode, and service wavelength information of the first network device, and the second identification information, operating mode, and ephemeris prediction information of the satellite associated with the first network device.

[0047] As an improvement to the above scheme, the handover process corresponding to the second independent handover indicates at least one of the following:

[0048] First, the target feeder link establishment process is initiated from the satellite associated with the first network device to the target gateway station, and then the source feeder link of the source gateway station is released.

[0049] When the satellite associated with the first network device is in transparent mode, the source feed link of the source gateway station is first released through the satellite associated with the first network device, and then the target feed link establishment process is initiated to the target gateway station.

[0050] When the satellite associated with the first network device is in regeneration mode, the source power supply link of the source gateway station is first released through the satellite associated with the first network device, and then the target power supply link establishment process is initiated to the target gateway station; wherein, the satellite-ground cooperative control network element decides whether to trigger the link establishment process based on the power supply link interruption duration, so as to re-establish the connection between the satellite-ground cooperative control network element and the first network device.

[0051] As an improvement to the above solution, the method further includes:

[0052] When the first network device establishes a connection with the satellite-ground cooperative control network element for the first time, it queries the first information table based on the locally stored first information table or from an external server; wherein, the first information table indicates the correspondence between the address information and service range of the satellite-ground cooperative control network element;

[0053] Based on the first information table, select a satellite-ground cooperative control network element whose service range matches the service area of ​​the satellite associated with the first network device to establish a link.

[0054] In a second aspect, embodiments of the present invention provide a cooperative handover device, applied to a first network device, comprising:

[0055] The switching type determination module is used to determine the switching type based on the first information;

[0056] A switch initiation module is used to initiate a switch process corresponding to the switch type;

[0057] The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

[0058] Thirdly, embodiments of the present invention provide a cooperative switching device, comprising: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the cooperative switching method as described in any one of the first aspects.

[0059] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the cooperative switching method as described in any one of the first aspects.

[0060] Fifthly, embodiments of the present invention provide a computer program product, including a computer program / instruction that, when executed by a processor, implements the cooperative switching method as described in any one of the first aspects.

[0061] Compared to existing technologies, this invention provides a collaborative handover method, apparatus, device, medium, and product. A first network device determines the handover type based on first information and initiates a handover process corresponding to the handover type. The handover type includes at least one of the following: coupled power supply handover and independent handover. Coupled power supply handover indicates that a power supply link handover process is coupled during the handover process of the satellite-to-ground cooperative control network element. Independent handover indicates that only the satellite-to-ground cooperative control network element handover process or the power supply link handover process is executed. This invention effectively solves the coordination problem between satellite-to-ground cooperative control network element handover and power supply link handover, avoids service interruptions caused by handover process conflicts, and ensures that satellite-to-ground cooperative control network elements can provide continuous wide-area satellite-to-ground cooperative services in low-Earth orbit satellite mobile scenarios. Attached Figure Description

[0062] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 This is a flowchart of a collaborative switching method provided in an embodiment of the present invention;

[0064] Figure 2 This is a flowchart illustrating the switching type determination provided in an embodiment of the present invention;

[0065] Figure 3 This is a schematic diagram of the coupling power supply switching process in a dual-power supply link scenario provided by an embodiment of the present invention;

[0066] Figure 4 This is a schematic diagram of the coupling power supply switching process in a single power supply link scenario provided by an embodiment of the present invention;

[0067] Figure 5 This is a schematic diagram of the process for independent switching of satellite-ground cooperative control network elements provided in an embodiment of the present invention;

[0068] Figure 6 This is a structural block diagram of a cooperative switching device provided in an embodiment of the present invention;

[0069] Figure 7 This is a structural block diagram of a cooperative switching device provided in an embodiment of the present invention. Detailed Implementation

[0070] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] It is understood that the various numerical designations used in the embodiments of this invention are merely for descriptive convenience and are not intended to limit the scope of this application. The order of the process numbers does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

[0072] In embodiments of the invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terms "a plurality or several" refer to two or more. "At least one / item" refers to one / item or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0073] See Figure 1 , Figure 1 This is a flowchart of a cooperative handover method provided in an embodiment of the present invention. The cooperative handover method is applied to a first network device and includes:

[0074] S11: Determine the switching type based on the first information;

[0075] S12: Initiate a switching process corresponding to the switching type;

[0076] The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

[0077] It should be noted that network equipment refers to nodes or devices that connect user equipment to a wireless network, and can also be called base stations or RAN equipment. For example, network equipment can be a base station, gNB (Generation NodeB, the next-generation node B in 5G, a 5G base station), Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved NodeB, or Home Node B, HNB), Base Band Unit (BBU), Transmitting and Receiving Point (TRP), Transmitting Point (TP), and / or Mobile Switching Center, etc., which are not limited in this invention. In this embodiment of the invention, the first network equipment is an NTN base station, which provides wireless access services to NTN terminals. The satellite's operating modes include, but are not limited to, transparent mode and regenerative mode. In transparent mode, the first network element is deployed on the ground, and the satellite only acts as a link for signal relay, without parsing or modifying the protocol layer data in the signal. In regenerative mode, the first network element is deployed on its associated satellite, enabling the satellite to have the complete functions of a base station.

[0078] The satellite-ground cooperative control network element is mainly used to: acquire cell / wavelength coverage information, configuration parameters, resource and performance parameters from terrestrial and satellite networks; and output information to the NTN and TN networks, including strategies for inter-satellite frequency reuse, interference coordination, satellite-ground mobility broadcasting and measurement, real-time beam control, and unified resource scheduling. Each satellite-ground cooperative control network element has its own service range, and multiple satellite-ground cooperative control network elements can jointly form a network to achieve coordinated satellite-ground resource services for the target area.

[0079] When a satellite moves through the service area of ​​different satellite-ground cooperative control network elements, a handover process needs to be performed between adjacent satellite-ground cooperative control network elements. In this embodiment of the invention, the satellite-ground cooperative control network element associated with the current service area is called the source satellite-ground cooperative control network element, and the satellite-ground cooperative control network element associated with the next service area is called the target satellite-ground cooperative control network element.

[0080] Simultaneously, as the satellite moves, when it is about to exceed the communication angular range of the source gateway station it is connected to, a feed link switch will be triggered. This means the gateway station connected to the satellite changes, and the target gateway station, whose elevation angular range meets the communication requirements (e.g., the signal strength between the satellite and the gateway station needs to reach a certain threshold within the elevation angular range), takes over the work of the source gateway station and establishes a new feed link with the satellite (i.e., the target feed link). Depending on whether the satellite-ground cooperative control network element switch and the feed link switch occur simultaneously, three different scenarios can be identified: Scenario 1: Feed link switch and satellite-ground cooperative control network element switch simultaneously; Scenario 2: Only satellite-ground cooperative control network element switch without feed link switch; Scenario 3: Only feed link switch without satellite-ground cooperative control network element switch.

[0081] The switching type corresponding to the above scenario can be defined as coupled power supply switching. The switching process corresponding to the coupled power supply switching indicates that when the target power supply link is established, the first network device initiates the link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0082] In the above scenario, the first network device needs to wait for the satellite's target feed link to be established before initiating the link establishment process to the target satellite-ground cooperative control network element, and then release the source satellite-ground cooperative control network element interface link resources.

[0083] The handover types corresponding to scenarios two and three above can be defined as independent handover, wherein the independent handover includes a first independent handover that indicates only the handover process of the satellite-ground cooperative control network element and a second independent handover that indicates only the handover process of the power supply link.

[0084] The handover process corresponding to the first independent handover indicates that, after the handover preparation process is completed, the first network device autonomously initiates a link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0085] In scenario two above, after the first network device receives the handover preparation completion response from the source satellite-ground cooperative control network element and establishes a connection with the target satellite-ground cooperative control network element, it can release the interface link resources of the source satellite-ground cooperative control network element. It should be noted that during the period between the completion of the handover preparation and the establishment of the link with the target satellite-ground cooperative control network element, services are provided through the source satellite-ground cooperative control network element.

[0086] The second independent handover corresponds to a handover process that instructs the satellite associated with the first network device to perform a feeder link handover process when the handover conditions are met (e.g., the satellite is about to exceed the communication angle range of the connected source gateway station).

[0087] In this embodiment of the invention, by introducing a handover type, during the handover preparation process, the first network device first determines whether the handover type is coupled power supply handover or independent handover, and then initiates the corresponding handover process based on different handover types. This effectively solves the coordination problem of handover between satellite-ground cooperative control network elements and power supply link handover, avoids service interruption caused by handover process conflicts, and ensures that satellite-ground cooperative control network elements can provide continuous wide-area satellite-ground cooperative services in low-orbit satellite mobile scenarios.

[0088] Furthermore, the method also includes:

[0089] When the first network device establishes a connection with the satellite-ground cooperative control network element for the first time, it queries the first information table based on the locally stored first information table or from an external server; wherein, the first information table indicates the correspondence between the address information and service range of the satellite-ground cooperative control network element;

[0090] Based on the first information table, select a satellite-ground cooperative control network element whose service range matches the service area of ​​the satellite associated with the first network device to establish a link.

[0091] In this embodiment of the invention, the first network device has a built-in information table of satellite-ground cooperative control network elements or queries a first information table of satellite-ground cooperative control network elements from an external server. This first information table maintains the correspondence between at least one of the address information (IP, port, domain name) of the satellite-ground cooperative control network element and its service range. When the first network device establishes a connection with a satellite-ground cooperative control network element for the first time, it can obtain and select a satellite-ground cooperative control network element whose service range matches the service area of ​​the satellite associated with the first network device, and select that satellite-ground cooperative control network element to provide satellite-ground cooperative services. Subsequently, when the satellite moves through the service range of different satellite-ground cooperative control network elements, a switching process between adjacent satellite-ground cooperative control network elements can be triggered to ensure the continuity of satellite-ground cooperative services.

[0092] The first information includes at least one of the following:

[0093] The first indication information sent in advance by the satellite associated with the first network device; wherein, the first indication information is used to indicate that the first network device is about to undergo a power supply link switch, and the first indication information carries the switch time of the power supply link;

[0094] The satellite's ephemeris prediction information;

[0095] The satellite's service wavelength prediction information;

[0096] The elevation angle range of the source gateway station connected to the satellite;

[0097] Service range of source-space-ground collaborative control network elements.

[0098] Specifically, determining the switching type based on the first information includes:

[0099] Based on at least one of the following information: the ephemeris prediction information, the service wavelength prediction information, the elevation angle range of the source gateway station, the elevation angle range of the target gateway station, and the power supply link switching time, determine whether to trigger a power supply link switching; or, determine whether to trigger a power supply link switching upon receiving the first indication information.

[0100] Based on at least one of the following information: ephemeris prediction information, service wave position prediction information, service range of the source satellite-ground cooperative control network element, and elevation angle range of the target satellite-ground cooperative control network element, determine whether to trigger satellite-ground cooperative control network element handover.

[0101] When both power supply link switching and satellite-to-ground cooperative control network element switching are triggered simultaneously, the switching type is determined to be coupled power supply switching.

[0102] In the case where only the satellite-ground cooperative control network element handover is triggered, the handover type is determined to be the first independent handover;

[0103] If only the power supply link is switched, the switching type is determined to be the second independent switching.

[0104] For example, whether a power supply link switching is triggered can be determined by at least one of the following methods:

[0105] The satellite provides instructions to the first network device; for example, the satellite sends a first indication message to the first network device a certain amount of time in advance to indicate that the first network device is about to undergo a power supply link switch. The first indication message carries the switching time of the power supply link; for example, when the switching time of the power supply link is reached, the power supply link switch is triggered.

[0106] The first network device determines whether to trigger a feeder link handover based on at least one of the following: ephemeris prediction information, service beam position prediction information, and the elevation angle range of the source gateway station. For example, based on the satellite position change trajectory recorded by the ephemeris prediction information over a future period, it calculates the relative position change between the satellite and the source gateway station. If the satellite is about to move to the edge of the elevation angle range of the source gateway station or is about to exceed that elevation angle range, it determines that a feeder link handover should be triggered. Or, for example, if the beam pointing of the satellite recorded by the service beam position prediction information deviates from the elevation angle range of the source gateway station, it determines that a feeder link handover should be triggered.

[0107] Whether the first independent handover, which instructs only to perform a handover of satellite-ground cooperative control network elements, has been triggered can be determined by at least one of the following methods:

[0108] The first network device or source-satellite-ground cooperative control network element determines whether to trigger a satellite-ground cooperative control network element handover based on at least one of the following: ephemeris prediction information, service beam position prediction information, the service range of the source-satellite-ground control network element, and the elevation angle range of the target satellite-ground cooperative control network element. For example, based on the satellite position change trajectory recorded in the ephemeris prediction information over a future period, the relative position change between the satellite and the source-satellite-ground cooperative control network element is calculated. If the satellite is about to move to the edge of the service range of the source-satellite-ground cooperative control network element or is about to exceed the service range, a satellite-ground cooperative control network element handover is triggered. Alternatively, if the satellite's beam pointing deviates from the service range of the source-satellite-ground cooperative control network element as recorded in the service beam position prediction information, a satellite-ground cooperative control network element handover is triggered.

[0109] In this embodiment of the invention, a first network device performs a handover type determination to determine whether a power supply link handover or a satellite-to-ground cooperative control network element handover is triggered. If both are triggered simultaneously (i.e., scenario one above), it further determines whether the associated satellite supports a dual-power supply link scenario. If supported, the coupled power supply handover process under the dual-power supply link scenario is executed; otherwise, the coupled power supply handover process under the single-power supply link scenario is executed. If only a satellite-to-ground cooperative control network element handover is triggered (i.e., scenario two above), only the satellite-to-ground cooperative control network element handover process is executed. If only a power supply link handover is triggered (i.e., scenario three above), only the power supply link handover process is triggered. Figure 2 As shown.

[0110] If the first network device determines that it is either scenario one or scenario two, then the first network device initiates a handover preparation process to the source-satellite-ground cooperative control network element, carrying the handover type (such as coupled power supply handover or independent handover), so that the source-satellite-ground cooperative control network element transfers the context information of the first network device to the target satellite-ground cooperative control network element, and after the handover is completed, sends a response to the first network device that the handover preparation is complete.

[0111] Furthermore, in Scenario 1, if the first network device receives the switching time of the feeder link indicated by the satellite, it can also carry the switching time of the feeder link when the first network device initiates the switching preparation process to the source-satellite-ground cooperative control network element.

[0112] Specifically, the switching process corresponding to the coupling feed switching includes:

[0113] A first request is sent to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the source-satellite-ground cooperative control network element to initiate a handover preparation process, and the first request carries the handover type (and may further carry the handover time of the target feeder link); the second information includes, but is not limited to: the first identification information, operating mode (e.g., flat scan or staring), and service spectral information of the first network device, and the second identification information, operating mode (e.g., transparent mode or regeneration mode), and ephemeris prediction information of the satellite associated with the first network device.

[0114] During the handover preparation process, the source satellite-ground cooperative control network element transfers the second information to the target satellite-ground cooperative control network element associated with the next service area, so that the target satellite-ground cooperative control network element performs satellite-ground resource collaborative allocation function according to the second information.

[0115] The satellite-ground resource collaborative allocation function includes at least one of the following:

[0116] Neighbor relationship calculation;

[0117] Frequency coordination;

[0118] Beam to beam position allocation.

[0119] It should be noted that the satellite-ground cooperative control network element performs services such as neighbor cell relationship calculation, frequency coordination, and beam-to-position allocation based on the first identification information (i.e., NTN base station identifier), operating mode (e.g., flat scan or staring), and service position information of the first network device, as well as the second identification information (i.e., satellite identifier), operating mode (e.g., transparent mode or regeneration mode), and ephemeris prediction information of the satellite associated with the first network device. These functions are existing technologies and will not be described in detail in this embodiment of the invention.

[0120] The system receives a first message sent by the source-satellite-ground cooperative control network element; wherein the first message is used to indicate that the handover preparation process is complete.

[0121] Receive a second message sent by the satellite; wherein the second message is used to indicate that the target feed link has been successfully established.

[0122] The second message is triggered after the target power supply link between the satellite and the target gateway station is established.

[0123] For example, since the establishment and release of the power supply link occur between the satellite and the gateway station, the first network device can prepare for handover in advance based on satellite indications or its own calculations, enabling the establishment of the target power supply link between the satellite and the gateway station at any time. Alternatively, the first network device can know in advance that the source power supply link will be released, and therefore prepare for handover in advance, enabling the release of the source power supply link between the satellite and the gateway station at any time. As an example, in a scenario of establishing first and then deleting, the target power supply link can be triggered for establishment after the handover preparation process is completed, and the source power supply link can be released after the connection between the target satellite-ground cooperative control network element and the first network device is successfully established; that is, the source power supply link between the satellite and the source gateway station remains connected during the establishment of the target power supply link. As another example, in a scenario of deleting first and then establishing, the target power supply link can be triggered for establishment after the source power supply link is released, and the source power supply link can be released after the handover preparation process is completed.

[0124] A second request is sent to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element; the second request includes third information; the third information includes, but is not limited to: the first identification information of the first network device and the second identification information of the satellite associated with the first network device; during the link establishment process, the target satellite-ground cooperative control network element establishes a connection with the first network device and saves the context information of the first network device and the satellite associated with the first network device.

[0125] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0126] Upon receiving the third message, the first network element actively releases the interface link resources of the source-satellite-ground cooperative control network element.

[0127] The interface link resources between the source-satellite-ground cooperative control network element and the first network element device are released in at least one of the following ways:

[0128] The target satellite-ground cooperative control network element instructs the source satellite-ground cooperative control network element to release the interface link resources of the first network element device through the second indication information; wherein, the second indication information is sent by the target satellite-ground cooperative control network element to the source satellite-ground cooperative control network element after sending the third message;

[0129] The source-satellite-ground collaborative control network element actively releases the interface link resources of the first network element device when the timer expires; wherein, the timer is started by the source-satellite-ground collaborative control network element when sending the fourth message; wherein, the fourth message is used to indicate that the second message was successfully handed over.

[0130] In this embodiment of the invention, the switching process corresponding to the coupling power supply switching includes: the coupling power supply switching process in the dual power supply link scenario and the coupling power supply switching process in the single power supply link scenario.

[0131] For example, such as Figure 3 As shown, taking the NTN base station as the first network device, the coupled feeder switching process in the dual-feed link scenario is explained in detail. The specific process is as follows:

[0132] (Optional) Step 1: The satellite indicates to the NTN base station that a power supply link switch is about to occur at a certain amount of time in advance, carrying the power supply link switch time.

[0133] Step 2: If Step 1 is not present, the NTN base station determines, based on ephemeris prediction information, service beam prediction information, and the elevation angle range of the source signaling station, that the satellite will illuminate a new area (i.e., the next service area) after a certain amount of time, thus triggering a feeder link handover. At this time, the NTN base station initiates an NTN base station handover request (i.e., the first request mentioned above) to the source satellite-ground cooperative control network element associated with the current service area. If Step 1 is present, the NTN base station initiates an NTN base station handover request (i.e., the first request mentioned above) to the source satellite-ground cooperative control network element associated with the current service area before the feeder link handover time is reached. That is, a certain amount of time is needed to initiate the handover preparation process in advance.

[0134] Step 3: After receiving the NTN base station handover request, or if it determines that a power supply link handover is needed, the source satellite-ground cooperative control network element initiates an NTN base station information transfer request to the target satellite-ground cooperative control network element, forwarding the relevant information of the NTN base station and satellite (i.e., the second information mentioned above) to the target satellite-ground cooperative control network element associated with the next service area. It should be noted that the logic of the satellite-ground cooperative control network element in determining whether a power supply link handover is needed is the same as the logic of the NTN base station.

[0135] Step 4: The target satellite-ground cooperative control network element stores the relevant information of the above-mentioned NTN base station and satellite, begins to perform pre-calculation of service functions such as neighbor cell relationship calculation, frequency coordination, and beam-to-position allocation, and replies the base station information transfer response to the source satellite-ground cooperative control unit.

[0136] It should be noted that the target satellite-ground cooperative control network element stores the information (such as neighbor cell information or frequency usage strategy) obtained after pre-calculating the service functions it executes locally, and does not output any neighbor cell information or frequency usage strategy to the base station. Until the source feeder link is interrupted, the source satellite-ground cooperative network element still provides cooperative services. By pre-calculating the service functions executed by the target satellite-ground cooperative network element, it can avoid the target satellite-ground cooperative network element not having enough time to calculate the relevant service functions after the target feeder link is established, which would lead to a lack of connection and service interruption.

[0137] Step 5: After receiving the relevant information (i.e., the second information mentioned above) and the transfer response (i.e., the fourth message mentioned above) from the NTN base station and the satellite, the source-satellite-ground cooperative control network element starts a timer to release the interface link resources of the NTN base station and replies to the NTN base station with a base station handover response (i.e., the first message mentioned above), indicating that the handover preparation process is complete.

[0138] Step 6: The satellite executes the feed link switching procedure when the switching conditions defined by its own strategy are met. If the satellite supports dual feed links, it can adopt the method of first establishing the target feed link and then deleting the source strategy. That is, while maintaining the source feed link with the source gateway station, the satellite establishes the target feed link with the target gateway station.

[0139] Step 7: After the target feed link is established, the satellite sends a message to the NTN base station indicating that the target feed link has been established.

[0140] Step 7': After step 6 is completed, the source feed link is released between the satellite and the source gateway station;

[0141] Step 8: The NTN base station receives a message from the satellite indicating that the target feeder link has been successfully established (i.e., the second message mentioned above), and initiates a connection establishment request (i.e., the second request mentioned above) to the target satellite-ground cooperative control network element.

[0142] Step 9: The target satellite-ground cooperative control network element establishes a connection with the NTN base station, saves and associates the context information of the NTN base station / satellite, and replies with a response message.

[0143] (Optional) Step 10: After replying to the NTN base station with a response message, the target satellite-ground cooperative control network element may initiate a connection release request to the source satellite-ground cooperative control network element, instructing the source satellite-ground cooperative control network element to release the interface link resources of the NTN base station. If the target satellite-ground cooperative control network element does not instruct the source satellite-ground cooperative control network element to release the interface link resources of the NTN base station, the source satellite-ground cooperative control network element will release the interface link resources of the NTN base station according to the timer timeout started in step 5.

[0144] It should be noted that interface link resources include, but are not limited to, the interface resources of NTN base station / space-ground cooperative control network element (the connection interface between NTN base station and space-ground cooperative control network element) and its context information, which are not specifically limited in the embodiments of the present invention.

[0145] Step 11: After receiving the response message that the target satellite-ground cooperative control network element connection has been successfully established (i.e., the third message mentioned above), the NTN base station releases the source feeder link and context information of the source gateway station.

[0146] It should be noted that step 7' can be carried out in parallel with steps 7 to 11, and no specific limitation is made in this embodiment of the invention.

[0147] For example, taking the first network device as an NTN base station, the coupled feeder switching process in a single feeder link scenario is as follows: Figure 4 As shown, the coupled feeder switching process in a single-feed link scenario is the same as described above. Figure 3 The difference in the coupled feeder switching process under the dual-feed link scenario shown is that: in scenarios where the satellite supports a single feeder link, the feeder link switching adopts the method of first releasing the source feeder link and then establishing the target feeder link, while simultaneously coupling the switching process between satellite-ground cooperative control network elements. The specific process is as follows:

[0148] Steps 1-5 are the same as steps 1-5 in the coupled power supply switching process under the dual-power supply link scenario described above.

[0149] Step 6: After the handover preparation process in Step 5 is completed, the source feed link is released between the satellite and the source gateway station;

[0150] Steps 7-12: Steps 6-11 (excluding step 7') of the coupling power supply switching process in the dual-power supply link scenario described above are the same.

[0151] Specifically, the switching process corresponding to the first independent switch includes:

[0152] Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type;

[0153] Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete;

[0154] Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element;

[0155] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0156] In this embodiment of the invention, if the service ranges of the satellite-to-ground cooperative control network element and the gateway station differ along the satellite's orbital path, then even if the feeder link remains unchanged, the change in the satellite's illumination area due to satellite movement will cause a change in the corresponding satellite-to-ground cooperative control network element, thereby triggering a handover between the satellite-to-ground cooperative control network elements. For example, taking an NTN base station as the first network device, if the feeder link does not switch, the process of only performing the handover of the satellite-to-ground cooperative control network element is as follows: Figure 5 As shown, the specific process is as follows:

[0157] Steps 1-4 are the same as steps 2-5 of the coupled power supply switching process in the dual-power supply link scenario described above.

[0158] Steps 5-8: Steps 8-11 (excluding step 7') of the coupling power supply switching process in the dual-power supply link scenario described above are the same.

[0159] Specifically, the handover process corresponding to the second independent handover indicates at least one of the following:

[0160] First, the target feeder link establishment process is initiated from the satellite associated with the first network device to the target gateway station, and then the source feeder link of the source gateway station is released.

[0161] When the satellite associated with the first network device is in transparent mode, the source feed link of the source gateway station is first released through the satellite associated with the first network device, and then the target feed link establishment process is initiated to the target gateway station.

[0162] When the satellite associated with the first network device is in regeneration mode, the source power supply link of the source gateway station is first released through the satellite associated with the first network device, and then the target power supply link establishment process is initiated to the target gateway station; wherein, the satellite-ground cooperative control network element decides whether to trigger the link establishment process based on the power supply link interruption duration, so as to re-establish the connection between the satellite-ground cooperative control network element and the first network device.

[0163] In this embodiment of the invention, the service range of the satellite-ground cooperative control network element is larger than that of the gateway station on the satellite's orbital path. Therefore, due to satellite movement, changes in its illumination area may cause changes in the gateway station while the satellite-ground cooperative control network element remains unchanged. That is, the satellite-ground cooperative control network element does not switch while the feeder link switch is performed. In this case, a separate feeder link switch process can be performed. There are three main scenarios for this separate feeder link switch:

[0164] The first scenario: establishing the target feeder link first and then deleting the source feeder link (see [reference]). Figure 3 The switching process of the feeder link in the coupled feeder switching process under the dual-feeder link scenario is shown. In this case, the satellite-ground cooperative control network element does not take any action, that is, there is no need to switch the satellite-ground cooperative control network element.

[0165] The second scenario: In transparent mode, the source feeder link is deleted first, and then the target feeder link is established (see [reference]). Figure 4 The switching process of the feeder link in the coupled feeder switching process under the single feeder link scenario is shown. In this case, the satellite-ground cooperative control network element does not take any action, that is, there is no need to perform satellite-ground cooperative control network element switching.

[0166] The third scenario: In regenerative mode, the method of first deleting the source feed link and then establishing the target feed link can be found in [reference needed]. Figure 3 The diagram illustrates the switching process of the feeder link in the coupled feeder switching procedure under the dual-feeder link scenario. The difference from the second scenario is that, since the first network device (e.g., an NTN base station) is deployed on a satellite, there will be a brief feeder link interruption from the deletion of the source feeder link to the successful establishment of the target feeder link. The satellite-ground cooperative control network element decides whether to trigger the re-establishment of the connection with the first network device based on the duration of the feeder link interruption. For example, triggering the re-establishment of the connection with the first network device when the feeder link interruption duration exceeds a set threshold can reduce unnecessary link re-establishment operations. Frequent triggering of link re-establishment between base stations may lead to frequent changes in the network topology, thus ensuring network stability.

[0167] Compared to existing technologies, this invention proposes a method for handover of satellite-ground cooperative control network elements in low-Earth orbit (LEO) satellite mobile scenarios. During the handover preparation process, the NTN base station performs handover type perception and judgment, including coupled feeder link handover (where LEO cooperative control network element handover is coupled with feeder link handover), independent handover (where LEO cooperative control network element handover is independent), and independent handover (where feeder link handover is independent). Then, different handover processes are performed based on different handover types. This invention fully considers the relationship between handover between LEO cooperative control network elements and feeder link handover, and can complete LEO satellite cooperative control in low-Earth orbit (LEO) satellite mobile scenarios. The network element handover process solves the coordination problem of handover between satellite-ground cooperative control network elements and power supply link handover. Through a multi-mode handover process that dynamically adapts to handover types, resource conflicts and service interruptions during handover can be avoided, network resource optimization is achieved, and satellite-ground cooperative control network elements can provide continuous wide-area satellite-ground cooperative services in low-Earth orbit satellite mobile scenarios. It also solves the problems of rigid strategies and low success rates in existing technologies, providing highly reliable and low-interruption satellite-ground cooperative communication guarantees for high-throughput satellite constellations. It is suitable for satellite-ground integrated communication systems and provides technical support for providing continuous full-coverage services for subsequent satellite-ground cooperative control network element networking.

[0168] Secondly, solutions are provided for two scenarios in coupled power supply scenarios: first deletion and then reconstruction of power supply links, and first reconstruction and then deletion. These solutions can address the problem of how satellite-ground cooperative control network elements can provide continuous wide-area satellite-ground cooperative services when the satellite is moving, ensuring efficient and stable wide-area continuous, highly reliable, and low-interruption satellite-ground cooperative communication for the target area.

[0169] See Figure 6 , Figure 6 This is a structural block diagram of a cooperative handover device provided in an embodiment of the present invention. The cooperative handover device is applied to a first network device and includes:

[0170] Switching type determination module 11 is used to determine the switching type based on the first information;

[0171] The switching initiation module 12 is used to initiate a switching process corresponding to the switching type.

[0172] The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

[0173] In an optional embodiment, the switching process corresponding to the coupling power supply switching indicates that, after the target power supply link is established, the first network device initiates a link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0174] The independent handover includes a first independent handover that indicates only the handover process of the satellite-ground cooperative control network element handover and a second independent handover that indicates only the handover process of the power supply link handover.

[0175] The handover process corresponding to the first independent handover indicates that, after the handover preparation process is completed, the first network device autonomously initiates a link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

[0176] In one optional embodiment, the first information includes at least one of the following:

[0177] The first indication information sent in advance by the satellite associated with the first network device; wherein, the first indication information is used to indicate that the first network device is about to undergo a power supply link switch, and the first indication information carries the switch time of the power supply link;

[0178] The satellite's ephemeris prediction information;

[0179] The satellite's service wavelength prediction information;

[0180] The elevation angle range of the source gateway station connected to the satellite;

[0181] Service range of source-space-ground collaborative control network elements.

[0182] In an optional embodiment, the switching type determination module 11 includes:

[0183] The first judgment unit is used to determine whether to trigger a power supply link switch based on at least one of the following information: the ephemeris prediction information, the service wavelength prediction information, the elevation angle range of the source gateway station, the elevation angle range of the target gateway station, and the power supply link switching time; or, to determine whether to trigger a power supply link switch when the first indication information is received.

[0184] The second judgment unit is used to determine whether to trigger a satellite-ground cooperative control network element handover based on at least one of the following information: the ephemeris prediction information, the service wave position prediction information, the service range of the source satellite-ground cooperative control network element, and the elevation angle range of the target satellite-ground cooperative control network element.

[0185] In the case of simultaneously triggering power supply link switching and satellite-ground cooperative control network element switching, the switching type is determined to be coupled power supply switching.

[0186] In the case where only the satellite-ground cooperative control network element handover is triggered, the handover type is determined to be the first independent handover;

[0187] If only the power supply link is switched, the switching type is determined to be the second independent switching.

[0188] In one optional embodiment, the switching process corresponding to the coupling feed switching includes:

[0189] Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type;

[0190] Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete;

[0191] Receive a second message sent by the satellite; wherein the second message is used to indicate that the target feed link has been successfully established;

[0192] Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element;

[0193] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0194] In one alternative embodiment, the second message is triggered after the target power supply link between the satellite and the target gateway station is established.

[0195] In one optional embodiment, the switching process corresponding to the first independent switch includes:

[0196] Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type;

[0197] Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete;

[0198] Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element;

[0199] Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

[0200] In an optional embodiment, the interface link resources between the source-satellite-ground cooperative control network element and the first network element device are released in at least one of the following ways:

[0201] The target satellite-ground cooperative control network element instructs the source satellite-ground cooperative control network element to release the interface link resources of the first network element device through the second indication information; wherein, the second indication information is sent by the target satellite-ground cooperative control network element to the source satellite-ground cooperative control network element after sending the third message;

[0202] The source-satellite-ground collaborative control network element actively releases the interface link resources of the first network element device when the timer expires; wherein, the timer is started by the source-satellite-ground collaborative control network element when sending the fourth message; wherein, the fourth message is used to indicate that the second message was successfully handed over.

[0203] In an optional embodiment, the device further includes:

[0204] The link resource release module is used to actively release the interface link resources of the source-satellite-ground cooperative control network element after receiving the third message.

[0205] In an optional embodiment, during the handover preparation process, the source satellite-ground cooperative control network element transfers the second information to the target satellite-ground cooperative control network element associated with the next service area, so that the target satellite-ground cooperative control network element performs satellite-ground resource collaborative allocation function according to the second information.

[0206] In an optional embodiment, during the link establishment process, the target satellite-ground cooperative control network element establishes a connection with the first network device and saves the context information of the first network device and the satellite associated with the first network device.

[0207] In one optional embodiment, the second request includes third information; the third information includes: first identification information of the first network device and second identification information of the satellite associated with the first network device.

[0208] In one optional embodiment, the second information includes: the first identification information, operating mode, and service wavelength information of the first network device, and the second identification information, operating mode, and ephemeris prediction information of the satellite associated with the first network device.

[0209] In one optional embodiment, the switching process corresponding to the second independent switching indicates at least one of the following:

[0210] First, the target feeder link establishment process is initiated from the satellite associated with the first network device to the target gateway station, and then the source feeder link of the source gateway station is released.

[0211] When the satellite associated with the first network device is in transparent mode, the source feed link of the source gateway station is first released through the satellite associated with the first network device, and then the target feed link establishment process is initiated to the target gateway station.

[0212] When the satellite associated with the first network device is in regeneration mode, the source power supply link of the source gateway station is first released through the satellite associated with the first network device, and then the target power supply link establishment process is initiated to the target gateway station; wherein, the satellite-ground cooperative control network element decides whether to trigger the link establishment process based on the power supply link interruption duration, so as to re-establish the connection between the satellite-ground cooperative control network element and the first network device.

[0213] In an optional embodiment, the device further includes:

[0214] The information table query module is used to query the first information table based on the locally stored first information table or from an external server when the first network device establishes a connection with the satellite-ground cooperative control network element for the first time; wherein, the first information table indicates the correspondence between the address information and the service range of the satellite-ground cooperative control network element;

[0215] The link establishment module is used to select a satellite-ground cooperative control network element whose service range matches the service area of ​​the satellite associated with the first network device, based on the first information table, for link establishment.

[0216] It should be noted that the working process of each module in the cooperative switching device described in the embodiments of the present invention can refer to the working process of the cooperative switching method described in the above embodiments, and the technical effect achieved is the same as that of the cooperative switching method described in the above embodiments, so it will not be repeated here.

[0217] See Figure 7 , Figure 7 This is a structural block diagram of a cooperative handover device provided in an embodiment of the present invention. The cooperative handover device includes a processor 21, a memory 22, and a computer program stored in the memory 22 and executable on the processor 21. When the processor 21 executes the computer program, it implements the steps in the various cooperative handover method embodiments described above, such as steps S11 to S12.

[0218] For example, the computer program may be divided into one or more modules / units, which are stored in the memory 22 and executed by the processor 21 to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the cooperative switching device.

[0219] The cooperative handover device may include, but is not limited to, processor 21 and memory 22. Those skilled in the art will understand that the schematic diagram is merely an example of a cooperative handover device and does not constitute a limitation on the cooperative handover device. It may include more or fewer components than illustrated, or combine certain components, or different components. For example, the cooperative handover device may also include input / output devices, network access devices, buses, etc.

[0220] The processor 21 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. The processor 21 is the control center of the cooperative switching device, connecting various parts of the entire cooperative switching device through various interfaces and lines.

[0221] The memory 22 can be used to store the computer programs and / or modules. The processor 21 implements various functions of the cooperative switching device by running or executing the computer programs and / or modules stored in the memory 22 and calling the data stored in the memory 22. The memory 22 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory 22 may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0222] Wherein, if the modules / units integrated in the cooperative switching device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor 21, it can implement the steps of the various method embodiments described above. Wherein, the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0223] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0224] The above description represents the preferred embodiments of the present invention. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A cooperative handover method, characterized in that, Applied to the first network device, including: Determine the switching type based on the first piece of information; Initiate a switching process corresponding to the switching type; The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

2. The cooperative handover method as described in claim 1, characterized in that, The switching process corresponding to the coupling power supply switching indicates that, after the target power supply link is established, the first network device initiates the link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element. The independent handover includes a first independent handover that indicates only the handover process of the satellite-ground cooperative control network element handover and a second independent handover that indicates only the handover process of the power supply link handover. The handover process corresponding to the first independent handover indicates that, after the handover preparation process is completed, the first network device autonomously initiates a link establishment process to the target satellite-ground cooperative control network element and releases the interface link resources of the source satellite-ground cooperative control network element.

3. The cooperative handover method as described in claim 2, characterized in that, The first information includes at least one of the following: The first indication information sent in advance by the satellite associated with the first network device; wherein, the first indication information is used to indicate that the first network device is about to undergo a power supply link switch, and the first indication information carries the switch time of the power supply link; The satellite's ephemeris prediction information; The satellite's service wavelength prediction information; The elevation angle range of the source gateway station connected to the satellite; Service range of source-space-ground collaborative control network elements.

4. The cooperative handover method as described in claim 3, characterized in that, The step of determining the switching type based on the first information includes: Based on at least one of the following information: the ephemeris prediction information, the service wavelength prediction information, the elevation angle range of the source gateway station, the elevation angle range of the target gateway station, and the power supply link switching time, determine whether to trigger a power supply link switching; or, determine whether to trigger a power supply link switching upon receiving the first indication information. Based on at least one of the following information: ephemeris prediction information, service wave position prediction information, service range of the source satellite-ground cooperative control network element, and elevation angle range of the target satellite-ground cooperative control network element, determine whether to trigger satellite-ground cooperative control network element handover. When both power supply link switching and satellite-to-ground cooperative control network element switching are triggered simultaneously, the switching type is determined to be coupled power supply switching. In the case where only the satellite-ground cooperative control network element handover is triggered, the handover type is determined to be the first independent handover; If only the power supply link is switched, the switching type is determined to be the second independent switching.

5. The cooperative handover method as described in claim 2, characterized in that, The switching process corresponding to the coupling feed switching includes: Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type; Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete; Receive a second message sent by the satellite; wherein the second message is used to indicate that the target feed link has been successfully established; Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element; Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

6. The cooperative handover method as described in claim 5, characterized in that, The second message is triggered after the target power supply link between the satellite and the target gateway station is established.

7. The cooperative handover method as described in claim 2, characterized in that, The switching process corresponding to the first independent switch includes: Send a first request to the source-satellite-ground cooperative control network element associated with the current service area; wherein, the first request is used to instruct the initiation of a handover preparation process to the source-satellite-ground cooperative control network element, and the first request carries the handover type; Receive a first message sent by the source-satellite-ground cooperative control network element; wherein, the first message is used to indicate that the handover preparation process is complete; Send a second request to the target satellite-ground cooperative control network element; wherein the second request is used to instruct the initiation of a link establishment process to the target satellite-ground cooperative control network element; Receive a third message sent by the target satellite-ground cooperative control network element; wherein the third message is used to indicate that the link establishment process is complete.

8. The cooperative switching method as described in claim 6 or 7, characterized in that, The interface link resources between the source-space-ground collaborative control network element and the first network element device are released in at least one of the following ways: The target satellite-ground cooperative control network element instructs the source satellite-ground cooperative control network element to release the interface link resources of the first network element device through the second indication information; wherein, the second indication information is sent by the target satellite-ground cooperative control network element to the source satellite-ground cooperative control network element after sending the third message; The source-satellite-ground collaborative control network element actively releases the interface link resources of the first network element device when the timer expires; wherein, the timer is started by the source-satellite-ground collaborative control network element when sending the fourth message; wherein, the fourth message is used to indicate that the second message was successfully handed over.

9. The cooperative switching method as described in claim 6 or 7, characterized in that, The method further includes: Upon receiving the third message, the interface link resources of the source-satellite-ground cooperative control network element are actively released.

10. The cooperative switching method as described in claim 6 or 7, characterized in that, During the handover preparation process, the source satellite-ground cooperative control network element transfers the second information to the target satellite-ground cooperative control network element associated with the next service area, so that the target satellite-ground cooperative control network element performs satellite-ground resource collaborative allocation function according to the second information.

11. The cooperative switching method as described in claim 6 or 7, characterized in that, During the link establishment process, the target satellite-ground cooperative control network element establishes a connection with the first network device and saves the context information of the first network device and the satellite associated with the first network device.

12. The cooperative switching method as described in claim 6 or 7, characterized in that, The second request includes third information; the third information includes: first identification information of the first network device and second identification information of the satellite associated with the first network device.

13. The cooperative handover method as described in claim 10, characterized in that, The second information includes: the first identification information, operating mode, and service wavelength information of the first network device, and the second identification information, operating mode, and ephemeris prediction information of the satellite associated with the first network device.

14. The cooperative handover method as described in claim 2, characterized in that, The handover process corresponding to the second independent handover indicates at least one of the following: First, the target feeder link establishment process is initiated from the satellite associated with the first network device to the target gateway station, and then the source feeder link of the source gateway station is released. When the satellite associated with the first network device is in transparent mode, the source feed link of the source gateway station is first released through the satellite associated with the first network device, and then the target feed link establishment process is initiated to the target gateway station. When the satellite associated with the first network device is in regeneration mode, the source power supply link of the source gateway station is first released through the satellite associated with the first network device, and then the target power supply link establishment process is initiated to the target gateway station; wherein, the satellite-ground cooperative control network element decides whether to trigger the link establishment process based on the power supply link interruption duration, so as to re-establish the connection between the satellite-ground cooperative control network element and the first network device.

15. The cooperative handover method as described in claim 1, characterized in that, The method further includes: When the first network device establishes a connection with the satellite-ground cooperative control network element for the first time, it queries the first information table based on the locally stored first information table or from an external server; wherein, the first information table indicates the correspondence between the address information and service range of the satellite-ground cooperative control network element; Based on the first information table, select a satellite-ground cooperative control network element whose service range matches the service area of ​​the satellite associated with the first network device to establish a link.

16. A cooperative switching device, characterized in that, Applied to the first network device, including: The switching type determination module is used to determine the switching type based on the first information; A switch initiation module is used to initiate a switch process corresponding to the switch type; The switching type includes at least one of the following types: coupled power supply switching and independent switching; the coupled power supply switching is used to indicate the coupled power supply link switching process during the satellite-ground cooperative control network element switching process; the independent switching is used to indicate that only the satellite-ground cooperative control network element switching process or the power supply link switching process is performed.

17. A cooperative switching device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the cooperative switching method as described in any one of claims 1 to 15.

18. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the cooperative switching method as described in any one of claims 1 to 15.

19. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instruction is executed by the processor, it implements the cooperative switching method as described in any one of claims 1 to 15.

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