Switching processing and device of feed link

Abstract

The invention provides a switching processing method and device for a feed link, and aims to solve the problem that more air resources are occupied when an IP address of a base station is updated when the feed link in a regeneration mode is switched. The method provided by the embodiment of the invention comprises the following steps: under the condition that a feed link of a satellite base station is switched, determining a target control plane IP address and a target user plane IP address corresponding to a target NTN gateway according to a corresponding relationship between the non-ground network NTN gateway and an IP address of the base station, the target NTN gateway being an NTN gateway connected with the switched feed link; according to the target control plane IP address, a connection establishment request message is sent to a first core network device, the connection establishment request message comprises indication information and a target user plane IP address, and the indication information is used for indicating that a feed link of the satellite base station is switched or an IP address of the satellite base station is changed.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a switching process and apparatus for a power supply link. Background Technology

[0002] In related technologies, for regeneration mode (i.e., base stations deployed on satellites), the base station connects to the terrestrial network via a feeder link and a non-terrestrial network (NTN) gateway, and provides access to the UE via a service link. When the feeder link switches, the base station needs to change its address due to deployment and IP transmission network planning requirements. Taking 5G networks as an example, the base station gNB is connected to the Access and Mobility Management Function (AMF) / User Plane Function (UPF). In existing solutions, when the base station gNB changes its N3 IP address, it needs to initiate an N3 address update with the AMF for each session. If there are many current sessions, this will result in a large amount of signaling data interaction between the satellite base station and the terrestrial AMF, consuming air resources. Summary of the Invention

[0003] The purpose of this application is to provide a method and apparatus for switching power supply links, so as to solve the problem that updating the IP address of the base station will occupy a lot of air resources when the power supply link in regenerative mode is switched.

[0004] To achieve the above objectives, this application provides a handover processing method for a feeder link, executed by a satellite base station, the method comprising:

[0005] In the event of a switchover of the feeder link of a satellite base station, the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway are determined based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the feeder link after the switchover.

[0006] Based on the target control plane IP address, a connection establishment request message is sent to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0007] Optionally, the connection establishment request message may further include at least one of the following:

[0008] The original control plane IP address of the satellite base station;

[0009] The original user plane IP address of the satellite base station;

[0010] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0011] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0012] Optionally, the first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

[0013] This application provides a switching processing method for a power supply link, executed by a first core network device, the method comprising:

[0014] Obtain a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed.

[0015] Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, the first session update request message including the target user plane IP address.

[0016] Optionally, based on the indication information and the target user plane IP address, a first session update request message is sent to the second core network device, including:

[0017] Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station;

[0018] Send the first session update request message to the second core network device corresponding to the at least one session.

[0019] Optionally, the connection establishment request message may further include at least one of the following: the original control plane IP address of the satellite base station; the original user plane IP address of the satellite base station;

[0020] The first session update request message also includes:

[0021] The original user plane IP address of the satellite base station;

[0022] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0023] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0024] Optionally, the second core network device is a Session Management Function (SMF) or a Serving Gateway (SGW).

[0025] This application provides a switching processing method for a power supply link, executed by a second core network device, the method comprising:

[0026] Obtain a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station;

[0027] Send a second session update request message to the user plane function UPF, the second session update request message including the target user plane IP address.

[0028] Optionally, the first session update request message may further include:

[0029] Original user plane IP address;

[0030] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0031] This application provides a switching processing device for a power supply link, including a memory, a transceiver, and a processor;

[0032] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0033] In the event of a switchover of the feeder link of a satellite base station, the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway are determined based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the feeder link after the switchover.

[0034] Based on the target control plane IP address, a connection establishment request message is sent to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0035] Optionally, the connection establishment request message may further include at least one of the following:

[0036] The original control plane IP address of the satellite base station;

[0037] The original user plane IP address of the satellite base station;

[0038] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0039] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0040] Optionally, the first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

[0041] This application provides a switching processing device for a power supply link, including a memory, a transceiver, and a processor;

[0042] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0043] Obtain a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed.

[0044] Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, the first session update request message including the target user plane IP address.

[0045] Optionally, the processor further implements the following steps:

[0046] Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station;

[0047] Send the first session update request message to the second core network device corresponding to the at least one session.

[0048] Optionally, the connection establishment request message may further include at least one of the following: the original control plane IP address of the satellite base station; the original user plane IP address of the satellite base station;

[0049] The first session update request message also includes:

[0050] The original user plane IP address of the satellite base station;

[0051] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0052] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0053] Optionally, the second core network device is a Session Management Function (SMF) or a Serving Gateway (SGW).

[0054] This application provides a switching processing device for a power supply link, including a memory, a transceiver, and a processor;

[0055] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0056] Obtain a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station;

[0057] Send a second session update request message to the user plane function UPF, the second session update request message including the target user plane IP address.

[0058] Optionally, the first session update request further includes:

[0059] Original user plane IP address;

[0060] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0061] This application provides a switching processing device for a power supply link, including:

[0062] The determining unit is used to determine the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station when the feeder link of the satellite base station is switched. The target NTN gateway is the NTN gateway connected to the feeder link after the switch.

[0063] The first sending unit is configured to send a connection establishment request message to the first core network device according to the target control plane IP address. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0064] This application provides a switching processing device for a power supply link, including:

[0065] The first acquisition unit is used to acquire a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed.

[0066] The second sending unit is configured to send a first session update request message to the second core network device according to the indication information and the target user plane IP address, wherein the first session update request message includes the target user plane IP address.

[0067] This application provides a switching processing device for a power supply link, including:

[0068] The second acquisition unit is used to acquire a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station;

[0069] The third sending unit is used to send a second session update request message to the user plane function (UPF), the second session update request message including the target user plane IP address.

[0070] This application provides a processor-readable storage medium storing a computer program for causing the processor to perform the steps of the power supply link switching processing method described above.

[0071] This application provides a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the power supply link switching processing method described above.

[0072] The above-mentioned technical solution of this application has at least the following beneficial effects:

[0073] In this embodiment, the satellite base station determines the target control plane IP address and target user plane IP address corresponding to the target NTN gateway based on the correspondence between the NTN gateway and the base station's IP addresses. The target NTN gateway is the NTN gateway connected to the switched feeder link. Based on the target control plane IP address, a connection establishment request message including indication information and the target user plane IP address is sent to the first core network device. This indication information indicates that the feeder link of the satellite base station has been switched or that the IP address of the satellite base station has changed. This causes the first core network device to send a first session update request message to the second core network device based on the indication information and the target user plane IP address. This first session update request message includes the target user plane IP address, thereby enabling the user plane function to update the user plane IP address of the satellite base station based on the target user plane IP address. In other words, the update of the user plane IP address for all sessions related to the satellite base station is achieved through node-level signaling (connection establishment request message and first session update request message), eliminating the need to send a separate user plane IP address update request message for each session. This significantly reduces signaling interaction between the satellite base station and the terrestrial network, effectively saving airborne resources. Attached Figure Description

[0074] Figure 1 A schematic diagram of the network architecture representing the regeneration mode;

[0075] Figure 2 One of the flowcharts illustrates a switching process for a power supply link according to an embodiment of this application;

[0076] Figure 3 A second flowchart illustrating the switching process of the power supply link according to an embodiment of this application;

[0077] Figure 4 The third flowchart illustrates the switching process of the power supply link according to an embodiment of this application;

[0078] Figure 5 This diagram illustrates a power supply link switching caused by satellite movement in an embodiment of this application.

[0079] Figure 6 An interactive schematic diagram illustrating the switching processing method of the power supply link according to an embodiment of this application;

[0080] Figure 7 A structural block diagram illustrating the switching processing apparatus for the power supply link according to an embodiment of this application;

[0081] Figure 8 One of the module schematic diagrams illustrating a switching processing device for a power supply link according to an embodiment of this application;

[0082] Figure 9A second schematic diagram of a switching processing device for a power supply link according to an embodiment of this application;

[0083] Figure 10 The third schematic diagram illustrates the switching processing device for the power supply link in an embodiment of this application. Detailed Implementation

[0084] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0085] The terms “first,” “second,” etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein may be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] In this application's embodiments, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. In this application's embodiments, the term "multiple" refers to two or more, and other quantifiers are similar.

[0087] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0088] To enable those skilled in the art to better understand the embodiments of this application, the following description will be provided first.

[0089] Among related technologies, research has been conducted on satellite access based on regenerative mode. A schematic diagram of the network architecture of regenerative mode is shown below. Figure 1 As shown.

[0090] The base station is deployed on a satellite and connects to the terrestrial Access and Mobility Management Function (AMF) / User Plane Function (UPF) via a feeder link and a non-terrestrial network (NTN) gateway. It provides NR access to the UE via a service link. For 4G access, the satellite base station connects to the terrestrial Mobility Management Entity (MME) / Serving Gateway (SGW).

[0091] For feed links, one NTN gateway can serve multiple satellites, and a satellite can also be served by multiple NTN gateways. Especially for Low Earth Orbit (LEO) / Middle Earth Orbit (MEO) satellites, as the satellite moves, it will connect to different NTN gateways at different locations. Therefore, the satellite's feed link will change.

[0092] Related technologies define and describe the process of feeder link switchover. Feeder link switchover refers to the process of switching a feeder link from a source NTN gateway to another target NTN gateway. It is a change process in the transport layer network and is divided into two types: hard feeder link switchover and soft feeder link switchover.

[0093] During a hard handover, a satellite can only be connected to one NTN gateway at a time, and the power supply link will be briefly interrupted. In contrast, during a soft handover, a satellite can connect to two NTN gateways simultaneously within the handover period.

[0094] The relevant technologies describe the power supply link switching process in regenerative mode, divided into two scenarios:

[0095] Scenario 1: The satellite connection service AMF / MME remains unchanged. For the satellite / base station IP, consider two scenarios: a) The base station IP changes. In 5G networks, the existing Transport Network Layer Association (TNLA) technology can be used. The satellite / base station adds a new Stream Control Transmission Protocol (SCTP) IP address and deletes the previous SCTP IP address; b) The base station IP remains unchanged, and the NG / S1 interface remains unchanged.

[0096] Scenario 2: Changes in the service AMF / MME for satellite connectivity. a) For the 5G scenario, since the existing process does not include an NG release procedure, it is necessary to study and clarify how to handle the connection from the base station to the original AMF; b) The base station needs to establish a connection to the new AMF / MME.

[0097] In related technologies, various solutions have been studied to address the problems caused by base station deployment on satellites and feeder link switching. The solutions related to this application are feeder link switching solutions, including:

[0098] Scenario 1: A handover occurs in the power supply link. The UE's serving cell remains the same, but the serving Mobility Management Entity (MME) changes. In this case, a Tracking Area Update (TAU) procedure needs to be triggered on the UE. The TAU can be triggered by the eNB broadcasting a specific message or by the MME notifying the UE via a Non-Access Stratum (NAS) message. After the TAU is completed, for a hard handover, the eNB and MME locally release the S1 connection; for a soft handover, either the eNB or the MME initiates the S1 connection release procedure.

[0099] Option 2 uses existing load balancing methods to handle feeder link handover, redirecting services to the target MME / AMF. For 4G systems, the weight factor of the original MME is set to 0, and the original MME initiates the S1 release process (carrying a specific reason value, such as feeder link handover); for 5G systems, the AMF initiates the user migration process or AN release process.

[0100] Scheme 3, the scenario where the serving AMF remains unchanged after the feeder link handover: 1) Before the feeder link handover occurs, the base station notifies the AMF of the impending feeder link handover based on each UE's session notification, or through node-level signaling (such as RAN CONFIGURATION UPDATE); 2) The AMF notifies the Session Management Function (SMF) of the impending feeder link handover through session-level messages (using the Protocol Data Unit Session Update Session Management Context Request (Nsmf_PDUSession_UpdateSMContextRequest) message) or through node-level messages (defining new service operations); 3) The SMF notifies the User Plane Function (UPF) to cache downlink data; 4) The feeder link handover then begins, and after the handover is completed, the base station updates the N3 address to the AMF / SMF / UPF using the N2 Path Switch Request or PDU Session Resource Modify Indication procedure.

[0101] After the power supply link is switched, the serving AMF changes in the following scenarios: 1) The base station first disconnects or suspends the connection with the original AMF, establishes a connection to the new AMF, and updates all PDU sessions to the new AMF through session-level messages; 2) Power supply link switching is achieved through N2 switching (only applicable to soft switching scenarios).

[0102] Option 4 analyzes two scenarios: one where the serving AMF remains unchanged after power supply link handover, and another where the AMF changes. When the serving AMF remains unchanged, existing solutions are used, including multi-TNLA support, N2 / S1 interface replacement (based on UE retention information IE), and session updates using the PDU Session Resource Modify Indication / Evolved Radio Access Bearer Modification Indication (E-RAB MODIFICATION INDICATION). When the serving AMF changes, for soft handover scenarios, logical eNB / gNB triggers UE handover (this method also applies to cases where the serving AMF remains unchanged). For both hard and soft handover scenarios, different TAIs are broadcast before and after handover to trigger UE TAU.

[0103] Of the aforementioned solutions, Schemes 1, 2, and 4 (partial schemes) primarily address scenarios where the AMF / MME changes after the feeder link switch. However, in a real-world environment, even if the base station address changes, the base station can still interconnect and establish a connection with the original AMF / MME through the bearer network. Therefore, this application focuses on scenarios where the AMF / MME remains unchanged before and after the feeder link switch.

[0104] For this scenario, Solution 4 proposes to implement link handover between the base station and the AMF / MME based on existing solutions, and to update the session using the PDU SESSION RESOURCE MODIFY INDICATION / E-RAB MODIFICATION INDICATION procedure. This solution is based on UE session-level updates, meaning that the gNB will initiate a session update to the AMF / MME for each session according to the current session status.

[0105] Option 3 proposes that before power supply handover, the base station notifies the AMF / SMF / UPF to cache downlink data, and during the handover process, updates the N3 address to the AMF / SMF / UPF using the N2 Path Switch Request or PDU Session Resource Modify Indication procedure. In this option, the process of the base station notifying the AMF / SMF / UPF to cache downlink data can be based on the UE session or on the node level. However, the N3 address update during power supply link handover is still based on each session.

[0106] Schemes 4 and 3 above initiate user plane address updates to the AMF / MME for each session. If there are many sessions, this will lead to a large amount of signaling data interaction between the satellite base station and the ground AMF / MME, consuming air resources. Therefore, it is essential to further optimize this process.

[0107] The switching processing method for the power supply link provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0108] like Figure 2 As shown in the embodiment of this application, a handover processing method for a power supply link is provided, which is executed by a satellite base station. The method includes:

[0109] Step 201: In the event of a switchover of the satellite base station's feeder link, determine the target control plane IP address and target user plane IP address corresponding to the target NTN gateway based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the switched feeder link.

[0110] The aforementioned satellite base station refers to a base station deployed on a satellite. This satellite base station can also be described as a satellite or a base station.

[0111] In this embodiment, the satellite base station configures and stores the mapping between the IP addresses of the NTN gateway (GW) and the base station. The IP address of the base station includes a control plane IP address and a user plane IP address.

[0112] Optionally, the control plane IP address can be an N2 IP address or an S1-C address, and the user plane IP address can be an N3 IP address or an S1-U address.

[0113] For example, as shown in Table 1, when the satellite base station uses NTN GW1, the N2 IP of the base station is IP1 and the N3 IP is IP2. When the satellite base station uses NTN GW2, the N2 IP of the base station is IP3 and the N3 IP is IP4.

[0114] Table 1

[0115]

[0116] It should be noted that the N2 / N3 addresses of the base stations can be the same or different. The above correspondence can be dynamically updated through Operation Administration and Maintenance (OAM).

[0117] Step 202: Based on the target control plane IP address, send a connection establishment request message to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0118] Optionally, the first core network device includes an AMF or an MME.

[0119] Here, the satellite base station uses a defined target control plane IP address to send a connection establishment request message to the AMF or MME, carrying the target user plane IP address and indication information in the request message. For 5G NR access, the AMF sends a first session update request message containing the target user plane IP address to the SMF based on the connection establishment request, which in turn causes the SMF to send the target user plane IP address to the UPF, allowing the UPF to update the base station's N3 IP address based on the target user plane IP address. For 4G access, the MME sends a first session update request message containing the target user plane IP address to the SGW based on the connection establishment request.

[0120] After the satellite base station sends the connection establishment request message to the first core network device, the first core network device (AMF / MME) sends a first session update request message to the second core network device (SMF / SGW associated with the satellite base station's session). This first session update request message includes the target user plane IP address. For 5G access, the second core network device sends a second session update request message to the UPF based on the first session update request message. This second session update request message also includes the target user plane IP address. The UPF then updates the N3 address of the satellite base station based on this target user plane IP address.

[0121] In the above scheme, the update of user plane IP addresses for all sessions related to the satellite base station is achieved through node-level signaling (connection establishment request message and first session update request message). There is no need to send user plane IP address update request messages separately for each session, which greatly reduces the signaling interaction between the satellite base station and the ground network and effectively saves air resources.

[0122] Optionally, the connection establishment request message may further include at least one of the following:

[0123] The original control plane IP address of the satellite base station;

[0124] The original user plane IP address of the satellite base station;

[0125] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0126] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0127] Here, by including the original control plane IP address of the satellite base station in the connection establishment request message, the first core network device can quickly match the corresponding satellite base station based on the original control plane IP address. By including the original user plane IP address in the connection establishment request, the subsequent user plane functions can quickly match the corresponding satellite base station based on the original user plane IP address.

[0128] Optionally, the connection establishment request message may also include a UE Retention Information IE, which indicates that the satellite base station requests the first core network device to retain the existing UE registration, session context, and signaling connection.

[0129] In this embodiment, the satellite base station determines the target control plane IP address and target user plane IP address corresponding to the target NTN gateway based on the correspondence between the NTN gateway and the base station's IP addresses. The target NTN gateway is the NTN gateway connected to the switched feeder link. Based on the target control plane IP address, a connection establishment request message including indication information and the target user plane IP address is sent to the first core network device. This indication information indicates that the feeder link of the satellite base station has been switched or that the IP address of the satellite base station has changed. This causes the first core network device to send a first session update request message to the second core network device based on the indication information and the target user plane IP address. This first session update request message includes the target user plane IP address, thereby enabling the user plane function to update the user plane IP address of the satellite base station based on the target user plane IP address. In other words, the update of the user plane IP address for all sessions related to the satellite base station is achieved through node-level signaling (connection establishment request message and first session update request message), eliminating the need to send a separate user plane IP address update request message for each session. This significantly reduces signaling interaction between the satellite base station and the terrestrial network, effectively saving airborne resources.

[0130] like Figure 3 As shown in the figure, this application embodiment also provides a switching processing method for a power supply link, which is executed by a first core network device. The method includes:

[0131] Step 301: Obtain a connection establishment request message sent by the satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0132] Optionally, the first core network device includes an AMF or an MME.

[0133] Step 302: Based on the indication information and the target user plane IP address, send a first session update request message to the second core network device, wherein the first session update request message includes the target user plane IP address.

[0134] Optionally, the second core network device is an SMF or an SGW.

[0135] Optionally, the first session update request message may further include indication information, which is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0136] In this embodiment, after the satellite base station sends the connection establishment request message to the first core network device, the first core network device sends a first session update request message to the second core network device (the SMF / SGW associated with the satellite base station's session). This first session update request message includes the target user plane IP address. For 5G access, the second core network device sends a second session update request message to the UPF based on the first session update request message. This second session update request message also includes the target user plane IP address. The UPF then updates the N3 address of the satellite base station based on this target user plane IP address.

[0137] In the above scheme, the update of user plane IP addresses for all sessions related to the satellite base station is achieved through node-level signaling (connection establishment request message and first session update request message). There is no need to send user plane IP address update request messages separately for each session, which greatly reduces the signaling interaction between the satellite base station and the ground network and effectively saves air resources.

[0138] Optionally, the connection establishment request message may further include at least one of the following: the original control plane IP address of the satellite base station; the original user plane IP address of the satellite base station;

[0139] The first session update request message also includes:

[0140] The original user plane IP address of the satellite base station;

[0141] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0142] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0143] By including the original user plane IP address in the first session update request message, the second core network device can send a second session update request message containing the original user plane IP address to the UPF, thereby facilitating the user plane function to quickly match the corresponding satellite base station based on the original user plane IP address.

[0144] Optionally, based on the indication information and the target user plane IP address, a first session update request message is sent to the second core network device, including:

[0145] Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station;

[0146] Send the first session update request message to the second core network device corresponding to the at least one session.

[0147] In this embodiment of the application, when the connection establishment request includes the original control plane IP address of the satellite base station, the first core network device quickly matches the satellite base station based on the original control plane IP address, updates the NG connection with the satellite base station based on the target control plane IP address, queries at least one session (such as a session list) related to the satellite base station stored internally, and initiates a first session update request message to the anchored SMF (i.e., the SMF corresponding to the at least one session).

[0148] In addition, if the connection establishment request does not contain the original control plane IP address of the satellite base station, the corresponding satellite base station can be matched based on the satellite base station's identification information.

[0149] As one implementation, for each anchored SMF, a first session update request is sent to perform a batch session update. This first session update request carries a list of session identifiers (SM Context IDs) and the target user plane IP address. Optionally, it also includes the original user plane IP address.

[0150] As an alternative implementation, the first session update request described above can be sent using the Service Operation Protocol Data Unit Session Update Session Management Context Request (Nsmf_PDUSession_UpdateSMContext Request). This request carries a list of session identifiers (SM Context IDs) and the target user plane IP address. Optionally, it may also include the original user plane IP address.

[0151] In this embodiment, a first core network device acquires a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information indicates that the feeder link of the satellite base station has switched or that the IP address of the satellite base station has changed. Based on the indication information and the target user plane IP address, a first session update request message is sent to a second core network device. The first session update request message includes the target user plane IP address, thereby enabling the user plane function to update the user plane IP address of the satellite base station based on the target user plane IP address. In other words, the update of the user plane IP address for all sessions related to the satellite base station is achieved through node-level signaling (the connection establishment request message and the first session update request message), eliminating the need to send a separate user plane IP address update request for each session. This significantly reduces signaling interaction between the satellite base station and the terrestrial network, effectively saving airborne resources.

[0152] like Figure 4 As shown in the embodiment of this application, a switching processing method for a power supply link is also provided, which is executed by a second core network device. The method includes:

[0153] Step 401: Obtain the first session update request message, which includes the target user plane IP address of the satellite base station.

[0154] The second core network device is the Session-Related Function (SMF) for the satellite base station. The second core network device receives the first session update request sent by the first core network device. This first core network device is the AMF.

[0155] The target user plane IP address is the correspondence between the IP address of the satellite base station's non-terrestrial network NTN gateway and the base station. The user plane IP address corresponding to the target NTN gateway is determined. The target NTN gateway is the NTN gateway connected to the feeder link after the handover.

[0156] Step 402: Send a second session update request message to the User Plane Function (UPF), the second session update request message including the target user plane IP address.

[0157] Optionally, the second session update request message may also include indication information, which is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0158] In this embodiment, the second core network device obtains a first session update request message, which includes the target user plane IP address of the satellite base station. This target user plane IP address is determined by the mapping between the IP addresses of the satellite base station's non-terrestrial network (NTN) gateway and the base station, identifying the user plane IP address corresponding to the target NTN gateway. The target NTN gateway is an NTN gateway connected to the feeder link after handover. The device then sends a second session update request message to the User Plane Function (UPF), which includes the target user plane IP address. This allows the UPF to update the user plane IP address of the satellite base station based on the target user plane IP address. In other words, the update of the user plane IP address for all sessions related to the satellite base station is achieved through node-level signaling (connection establishment request message and first session update request message), eliminating the need to send separate user plane IP address update request messages for each session. This significantly reduces signaling interaction between the satellite base station and the terrestrial network, effectively saving airborne resources.

[0159] Optionally, the first session update request message may further include:

[0160] Original user plane IP address;

[0161] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0162] Optionally, the second session update request message may also include:

[0163] Original user plane IP address;

[0164] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0165] By including the original user plane IP address in the first session update request message, the second core network device can send a second session update request message containing the original user plane IP address to the UPF, thereby facilitating the user plane function to quickly match the corresponding satellite base station based on the original user plane IP address.

[0166] In the above scheme, the second core network device obtains a first session update request message, which includes the target user plane IP address of the satellite base station. This target user plane IP address is determined by the mapping between the IP addresses of the satellite base station's non-terrestrial network (NTN) gateway and the base station, identifying the user plane IP address corresponding to the target NTN gateway. The target NTN gateway is the NTN gateway connected to the feeder link after handover. The device then sends a second session update request message to the User Plane Function (UPF), which includes the target user plane IP address. This allows the UPF to update the user plane IP address of the satellite base station based on the target user plane IP address. In other words, by using node-level signaling (connection establishment request message and first session update request message), the update of the user plane IP address for all sessions related to the satellite base station is achieved, eliminating the need to send separate user plane IP address update requests for each session. This significantly reduces signaling interaction between the satellite base station and the terrestrial network, effectively saving airborne resources.

[0167] The switching processing method of the power supply link of this application will be described in detail below with reference to the embodiments.

[0168] Example 1: 5G scenario;

[0169] As the satellite / base station moves relative to the ground, the feeder link switches from NTN gateway 1 to NTN gateway 2, accessing the same terrestrial core network (AMF / SMF / UPF, etc.), such as... Figure 5 As shown.

[0170] According to IP network planning and deployment requirements, gNBs may require different IP addresses when communicating with the terrestrial network through different NTN gateways. Therefore, this application requires the base station to configure and store a mapping table of NTN gateways and N2 / N3 IP addresses / lists. Assume that when the base station communicates with the terrestrial core network through NTN gateway 1, the N2 IP address is IP1 and the N3 IP address is IP2. When the base station communicates with the terrestrial core network through NTN gateway 2, the N2 IP address is IP3 and the N3 IP address is IP4.

[0171] like Figure 6 As shown, the process during power supply link switching includes:

[0172] Step 1: The base station establishes an NG connection with the ground AMF / UPF through NTN GW1 and provides services to the UE.

[0173] At this time, the N2 / N3 IP addresses of the base station are IP1 / IP2, respectively.

[0174] Step 2: As the satellite / base station moves relative to the ground, it needs to access the terrestrial network via NTN GW2. The gNB activates IP3 / IP4 based on the NTN network and the gNB IP address mapping table, and initiates an NG Setup Request to the AMF using the N2 IP address IP3. The NG Setup Request message carries:

[0175] The first item, UE Retention Information (IE), indicates that the gNB requests the AMF to retain the existing UE registration, session context, and signaling connection.

[0176] The second item: Indication information, indicating that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0177] The third item: the base station's new N3 IP address, namely the N3 address IP4 activated by the gNB.

[0178] The fourth item: the original N2 IP address of the base station, i.e., IP1.

[0179] Fifth item: The original N3 IP address of the base station, i.e., IP2.

[0180] The fourth and fifth items above are optional.

[0181] Step 3: AMF sends an NG connection establishment response.

[0182] Step 4: The AMF updates the NG connection with the gNB based on the instruction information and the original N2 IP address of the base station. The AMF queries the internally stored list of sessions related to this base station.

[0183] Step 5: Based on the queried session list, the AMF initiates the first session update request to the SMF to which the session is anchored.

[0184] Specifically, the first session update request message can be sent in the following two ways;

[0185] Method 1: For each session, use the service operation Nsmf_PDUSession_UpdateSMContextRequest to send the first session update request mentioned above. This request carries the following information:

[0186] A1: SM Context ID, i.e., session identifier.

[0187] A2: The new N3 IP address of the base station, that is, the N3 address newly activated by the base station as indicated by the AMF to the SMF.

[0188] A3: The original N3 IP address of the base station, that is, the original N3 address of the base station indicated by the AMF to the SMF.

[0189] Option A3 is optional.

[0190] Method 2: For each SMF, perform batch session updates using a new service operation. That is, use a new service operation to send the first session update request, which carries the following information:

[0191] A1: SM Context ID, i.e., session identifier.

[0192] A2: The new N3 IP address of the base station, that is, the N3 address newly activated by the base station as indicated by the AMF to the SMF.

[0193] A3: The original N3 IP address of the base station, that is, the original N3 address of the base station indicated by the AMF to the SMF.

[0194] Option A3 is optional.

[0195] Step 6: The SMF sends a second session update request (N4 Session Modification Request) message to the UPF, requesting the UPF to update the N3 address of the gNB.

[0196] Step 7: UPF replies to SMF with a session update response.

[0197] Step 8: SMF replies to AMF with a session update response.

[0198] For example, the session update response is Nsmf_PDUSession_UpdateSMContext Response.

[0199] Example 2: 4G scenario;

[0200] Similar to the 5G scenario described above, the 4G eNB configures and stores the mapping relationship between the NTN gateway and the S1-C / S1-U IP address / list.

[0201] During feeder link switching, the eNB sends a connection establishment request (such as an S1 Setup Request) message to the MME through the new NTN gateway. This message carries indication information and the base station's new S1-U IP address. Optionally, it also carries the base station's original S1-C IP address and original S1-U IP address. This indication information indicates that a feeder link switchover has occurred or that the eNB address has changed. Based on the received indication information and the user plane address, the MME sends a Modify Bearer Request message to the SGW.

[0202] It should be noted that the implementation process in this scenario is different from that in the 5G scenario, which will not be elaborated here.

[0203] like Figure 7 As shown, this application embodiment also provides a power supply link switching processing device, including a memory 720, a transceiver 700, and a processor 710;

[0204] The memory 720 is used to store computer programs; the transceiver 700 is used to send and receive data under the control of the processor.

[0205] In one embodiment of this application, the processor 710 is configured to read a computer program from the memory and perform the following operations:

[0206] In the event of a switchover of the feeder link of a satellite base station, the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway are determined based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the feeder link after the switchover.

[0207] Based on the target control plane IP address, a connection establishment request message is sent to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0208] Optionally, the connection establishment request message may further include at least one of the following:

[0209] The original control plane IP address of the satellite base station;

[0210] The original user plane IP address of the satellite base station;

[0211] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0212] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0213] Optionally, the first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

[0214] In one embodiment of this application, the processor 710 is configured to read a computer program from the memory and perform the following operations:

[0215] Obtain a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed.

[0216] Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, the first session update request message including the target user plane IP address.

[0217] Optionally, the processor 710 is also used for:

[0218] Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station;

[0219] Send the first session update request message to the second core network device corresponding to the at least one session.

[0220] Optionally, the connection establishment request message may further include at least one of the following: the original control plane IP address of the satellite base station; the original user plane IP address of the satellite base station;

[0221] The first session update request message also includes:

[0222] The original user plane IP address of the satellite base station;

[0223] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0224] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0225] Optionally, the second core network device is a Session Management Function (SMF) or a Serving Gateway (SGW).

[0226] In one embodiment of this application, the processor 710 is configured to read a computer program from the memory and perform the following operations:

[0227] Obtain a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station;

[0228] Send a second session update request message to the user plane function UPF, the second session update request message including the target user plane IP address.

[0229] Optionally, the first session update request message may further include:

[0230] Original user plane IP address;

[0231] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0232] Among them, Figure 7 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 710) and memory (memory 720). The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 700 can be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 710 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 710 during operation.

[0233] The processor 710 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0234] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above embodiment of the switching processing method for the power supply link of a satellite base station, a first core network device or a second core network device, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0235] like Figure 8 As shown in the figure, this application embodiment also provides a switching processing device for a power supply link, including:

[0236] The determining unit 801 is used to determine the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station when the feeder link of the satellite base station is switched. The target NTN gateway is the NTN gateway connected to the feeder link after the switch.

[0237] The first sending unit 802 is used to send a connection establishment request message to the first core network device according to the target control plane IP address. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0238] Optionally, the connection establishment request message may further include at least one of the following:

[0239] The original control plane IP address of the satellite base station;

[0240] The original user plane IP address of the satellite base station;

[0241] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0242] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0243] Optionally, the first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

[0244] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above-mentioned method embodiment for switching processing of the power supply link of a satellite base station, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0245] like Figure 9 As shown in the figure, this application embodiment also provides a switching processing device for a power supply link, including:

[0246] The first acquisition unit 901 is used to acquire a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

[0247] The second sending unit 902 is configured to send a first session update request message to the second core network device according to the indication information and the target user plane IP address, wherein the first session update request message includes the target user plane IP address.

[0248] Optionally, the second transmitting unit includes:

[0249] The acquisition subunit is used to acquire at least one session related to the satellite base station based on the indication information and the target user plane IP address;

[0250] The sending subunit is used to send the first session update request message to the second core network device corresponding to the at least one session.

[0251] Optionally, the connection establishment request message may further include at least one of the following: the original control plane IP address of the satellite base station; the original user plane IP address of the satellite base station;

[0252] The first session update request also includes:

[0253] The original user plane IP address of the satellite base station;

[0254] Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network;

[0255] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0256] Optionally, the second core network device is a Session Management Function (SMF) or a Serving Gateway (SGW).

[0257] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above embodiment of the switching processing method for the power supply link applied to the first core network equipment, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0258] like Figure 10 As shown in the figure, this application embodiment also provides a switching processing device for a power supply link, including:

[0259] The second acquisition unit 1001 is used to acquire a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station;

[0260] The third sending unit 1002 is used to send a second session update request to the User Plane Function (UPF), the second session update request including the target user plane IP address.

[0261] Optionally, the first session update request message may further include:

[0262] Original user plane IP address;

[0263] The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

[0264] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above embodiment of the switching processing method for the power supply link applied to the second core network equipment, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0265] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0266] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0267] In some embodiments of this application, a processor-readable storage medium is also provided, which stores program instructions for causing the processor to execute all the steps implemented in the method embodiments for implementing the above-described satellite base station or all the steps implemented in the method embodiments for implementing the first core network device or the second core network device, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail.

[0268] This application also provides a computer program product, including computer instructions. When executed by a processor, the computer instructions implement the various processes of the above-described power supply link switching method embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0269] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0270] The network device (or network-side device) involved in the embodiments of this application can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, the base station may also be called an access point, or a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA) system, a 5G base station (gNB) in a next-generation 5G network architecture, an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may also be geographically separated.

[0271] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0272] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0273] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0274] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0275] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0276] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A switching processing method for a power supply link, characterized in that, Performed by a satellite base station, the method includes: In the event of a switchover of the feeder link of a satellite base station, the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway are determined based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the feeder link after the switchover. Based on the target control plane IP address, a connection establishment request message is sent to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

2. The method according to claim 1, characterized in that, The connection establishment request message also includes at least one of the following: The original control plane IP address of the satellite base station; The original user plane IP address of the satellite base station; Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

3. The method according to claim 1 or 2, characterized in that, The first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

4. A switching processing method for a power supply link, characterized in that, Performed by the first core network device, the method includes: Obtain a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed. Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, the first session update request message including the target user plane IP address.

5. The method according to claim 4, characterized in that, Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, including: Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station; Send the first session update request message to the second core network device corresponding to the at least one session.

6. The method according to claim 4 or 5, characterized in that, The connection establishment request message also includes at least one of the following: the original control plane IP address of the satellite base station; The original user plane IP address of the satellite base station; The first session update request message also includes: The original user plane IP address of the satellite base station; Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

7. The method according to claim 4, characterized in that, The second core network device is either a Session Management Function (SMF) or a Service Gateway (SGW).

8. A switching processing method for a power supply link, characterized in that, Performed by a second core network device, the method includes: Obtain a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station; Send a second session update request message to the user plane function UPF, the second session update request message including the target user plane IP address.

9. The method according to claim 8, characterized in that, The first session update request message also includes: Original user plane IP address; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

10. A switching processing device for a power supply link, characterized in that, Includes memory, transceiver, and processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor. Processor, configured to read the computer program in the memory and perform the following operations: In the event of a switchover of the feeder link of a satellite base station, the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway are determined based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station. The target NTN gateway is the NTN gateway connected to the feeder link after the switchover. Based on the target control plane IP address, a connection establishment request message is sent to the first core network device. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

11. The apparatus according to claim 10, characterized in that, The connection establishment request message also includes at least one of the following: The original control plane IP address of the satellite base station; The original user plane IP address of the satellite base station; Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

12. The apparatus according to claim 10 or 11, characterized in that, The first core network device includes an Access and Mobility Management Function (AMF) or a Mobility Management Entity (MME).

13. A switching processing device for a power supply link, characterized in that, Includes memory, transceiver, and processor; A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Obtain a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed. Based on the indicated information and the target user plane IP address, a first session update request message is sent to the second core network device, the first session update request message including the target user plane IP address.

14. The apparatus according to claim 13, characterized in that, The processor also performs the following steps: Based on the indicated information and the target user plane IP address, obtain at least one session associated with the satellite base station; Send the first session update request message to the second core network device corresponding to the at least one session.

15. The apparatus according to claim 13 or 14, characterized in that, The connection establishment request message also includes at least one of the following: the original control plane IP address of the satellite base station; The original user plane IP address of the satellite base station; The first session update request message also includes: The original user plane IP address of the satellite base station; Wherein, the original control plane IP address is the IP address of the satellite base station communicating with the first core network device before the power supply link is switched, and the first core network device includes the control plane function of the core network; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

16. The apparatus according to claim 13, characterized in that, The second core network device is either a Session Management Function (SMF) or a Service Gateway (SGW).

17. A switching processing device for a power supply link, characterized in that, Includes memory, transceiver, and processor; A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Obtain a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station; Send a second session update request message to the user plane function UPF, the second session update request message including the target user plane IP address.

18. The apparatus according to claim 17, characterized in that, The first session update request message also includes: Original user plane IP address; The original user plane IP address is the IP address used by the satellite base station to communicate with the user plane functions of the core network before the power supply link is switched.

19. A switching processing device for a power supply link, characterized in that, include: The determining unit is used to determine the target control plane IP address and the target user plane IP address corresponding to the target NTN gateway based on the correspondence between the IP addresses of the non-terrestrial network NTN gateway and the base station when the feeder link of the satellite base station is switched. The target NTN gateway is the NTN gateway connected to the feeder link after the switch. The first sending unit is configured to send a connection establishment request message to the first core network device according to the target control plane IP address. The connection establishment request message includes indication information and the target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or the IP address of the satellite base station has been changed.

20. A switching processing device for a power supply link, characterized in that, include: The first acquisition unit is used to acquire a connection establishment request message sent by a satellite base station. The connection establishment request message includes indication information and a target user plane IP address. The indication information is used to indicate that the power supply link of the satellite base station has been switched or that the IP address of the satellite base station has been changed. The second sending unit is configured to send a first session update request message to the second core network device according to the indication information and the target user plane IP address, wherein the first session update request message includes the target user plane IP address.

21. A switching processing device for a power supply link, characterized in that, include: The second acquisition unit is used to acquire a first session update request message, wherein the session update request message includes the target user plane IP address of the satellite base station; The third sending unit is used to send a second session update request message to the user plane function (UPF), the second session update request message including the target user plane IP address.

22. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program that causes the processor to perform the steps of the power supply link switching processing method as described in any one of claims 1 to 3, or to perform the steps of the power supply link switching processing method as described in any one of claims 4 to 7, or to perform the steps of the power supply link switching processing method as described in any one of claims 8 to 9.

23. A computer program product, characterized in that, The method includes computer instructions that, when executed by a processor, implement the steps of the power supply link switching process method as described in any one of claims 1 to 3, or implement the steps of the power supply link switching process method as described in any one of claims 4 to 7, or implement the steps of the power supply link switching process method as described in any one of claims 8 to 9.

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