Connection management method, device and storage medium based on satellite backpack base station

Abstract

The present application provides a connection management method, device and storage medium based on a satellite backpack base station; wherein the method includes: the satellite backpack base station determines first information, the first information is used to assist UE in motion control, and the first information is also used to instruct the UE to feedback the UE's predicted motion trajectory to the satellite backpack base station before moving out of the satellite backpack base station cell, and the motion trajectory is used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE; thereby, the satellite backpack base station can perform reasonable operations on the RRC connection according to the UE's motion trajectory, so as to effectively improve the utilization rate of the satellite backpack base station network resources.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a connection management method, device and storage medium based on a satellite backpack base station. Background Art

[0002] In cellular communication systems, user equipment (UE) is usually connected to the base station through a wireless interface, and the base station is connected to the core network through optical fiber. The optical fiber interface has reliable transmission and larger transmission capacity, but it is easy to be damaged in the face of major natural disasters such as earthquakes and floods, and temporary communication islands are easily formed in areas where natural disasters occur; in order to solve the communication problem of communication islands, satellite backpack base stations came into being.

[0003] The satellite backpack base station is connected to the satellite through a wireless interface, and the satellite is connected to the core network element on the ground, thereby realizing the communication service of the UE. The satellite backpack base station can not only cope with natural disasters, but also be applied to temporary communication islands formed naturally in deserts and ocean cruise ships. By deploying backpack base stations and using satellite links to meet the communication needs of communication islands, the cost is low and the installation is convenient.

[0004] When deploying satellite backpack base stations on temporary communication islands, user equipment with fast movement capabilities is required to collect disaster information from different areas on the island in order to initiate rescue operations in the affected areas. However, UEs move quickly in isolated cells maintained by satellite backpack base stations and can easily move out of the cell coverage and lose connection with the wireless network. In this case, the satellite backpack base station cannot effectively manage the Radio Resource Control (RRC) connection between it and the UE, resulting in the ineffective use of the satellite backpack base station's network resources.

[0005] Therefore, in the scenario where the UE moves in an isolated cell maintained by a satellite backpack base station, how to effectively manage the RRC connection between it and the UE to improve the utilization of the satellite backpack base station network resources is an urgent problem to be solved. Summary of the invention

[0006] In view of the above problems, the present invention provides a connection management method, device and storage medium based on a satellite backpack base station. The satellite backpack base station can reasonably manage the RRC connection between the satellite backpack base station and the UE, thereby improving the utilization rate of the network resources of the satellite backpack base station.

[0007] In a first aspect, the present application provides a connection management method based on a satellite backpack base station, the connection management method comprising: the satellite backpack base station determines first information, the first information is used to assist a user equipment UE within the satellite backpack base station cell to perform motion control, and the first information is also used to instruct the UE to feedback the predicted motion trajectory of the UE to the satellite backpack base station before moving out of the satellite backpack base station cell, the motion trajectory being used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE; the satellite backpack base station sends the first information to the UE.

[0008] In the second aspect, the present application provides a connection management method based on a satellite backpack base station, the connection management method comprising: a UE receives first information sent by a satellite backpack base station, the first information being used to instruct the UE to feedback to the satellite backpack base station a predicted motion trajectory of the UE before moving out of the satellite backpack base station cell, the motion trajectory being used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE; based on the motion state of the UE and the first information, the communication behavior of the UE with the satellite backpack base station when moving is controlled.

[0009] In a third aspect, the present application provides a connection management device based on a satellite backpack base station, comprising a module for executing the connection management method based on a satellite backpack base station provided in the first aspect or the second aspect of the present application.

[0010] In a fourth aspect, the present application provides an electronic device comprising a memory and a processor, wherein the memory is configured to store computer program instructions; the processor is configured to execute the computer program instructions so that the electronic device implements the connection management method provided in the first aspect or the second aspect of the present application.

[0011] In a fifth aspect, the present application provides a readable storage medium including computer program instructions. A processor of an electronic device executes the computer program instructions so that the electronic device implements the connection management method described in the first aspect or the second aspect.

[0012] In the connection management method based on the satellite backpack base station provided in the present application, the satellite backpack base station determines information including one or more base stations, and sends the information to the UE, so that the UE performs motion control based on the information and feeds back the UE's motion trajectory to the satellite backpack base station. The UE's motion trajectory can be used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE; in this way, after sending the information of one or more base stations, the satellite backpack base station can know the motion trajectory of the UE, so that the satellite backpack base station can perform reasonable operations on the RRC connection according to the motion trajectory of the UE, thereby improving the utilization rate of the network resources of the satellite backpack base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a cellular communication system provided in an embodiment of the present application;

[0014] Figure 2A A schematic diagram of the structure of another communication system provided in an embodiment of the present application;

[0015] Figure 2B A schematic diagram of the positional relationship between the backpack base station and other base stations provided in the embodiment of the present application;

[0016] Figure 3 A schematic diagram of signaling interaction of a connection management method provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of signaling interaction of a connection management method provided in an embodiment of the present application;

[0018] Figure 5 A schematic diagram of signaling interaction of a connection management method provided in an embodiment of the present application;

[0019] Figure 6 A schematic diagram of signaling interaction of a connection management method provided in an embodiment of the present application;

[0020] Figure 7 A schematic diagram of the structure of a connection management device provided in an embodiment of the present application;

[0021] Figure 8 A schematic diagram of the structure of a connection management device provided in an embodiment of the present application;

[0022] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0028] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] An existing cellular communication system such as Figure 1As shown in the figure, the UE is connected to the traditional ground base station through a wireless interface, and the traditional ground base station is connected to the core network element through an optical fiber interface. Compared with the wireless interface, the transmission of the optical fiber interface is more reliable and has a larger transmission capacity. However, once a natural disaster such as an earthquake or flood occurs, the optical fiber interface is easily damaged. In this case, a backpack base station that uses a wireless interface for data communication comes into being.

[0031] Figure 2A A communication system based on satellites and satellite backpack base stations is provided to realize communication between UE and core network elements. Figure 2A As shown, a satellite backpack base station refers to a base station connected to a satellite through a wireless interface. The satellite is then connected to the core network elements on the ground. The satellite backpack base station uses the satellite to communicate with the core network elements on the ground, thereby realizing the communication service of the UE.

[0032] For the sake of simplicity, the satellite backpack base station in the embodiment of the present application can also be described as a backpack base station. The embodiment of the present application does not limit the name of the satellite backpack base station.

[0033] Backpack base stations can be used on temporary islands caused by disasters, or temporary communication islands formed naturally in deserts, ocean cruise ships, etc. When backpack base stations are deployed on temporary communication islands, user devices with fast-moving capabilities (such as drones) are needed to collect natural conditions in different areas on the islands, which is of great significance for disaster relief deployment.

[0034] In order to observe the natural conditions of various areas on the temporary island, the mobile area of ​​​​the user equipment is set to be larger, while the cell radius maintained by the backpack base station is usually smaller. Therefore, multiple backpack base stations are required to be deployed in different areas on the island in a dispersed manner. The user equipment moves between multiple backpack base station cells and can continuously observe the natural conditions of different areas on the island to carry out rescue in the disaster-stricken areas.

[0035] However, when backpack base stations are deployed, the distance between different backpack base stations may be far. Figure 2B As shown, the backpack base station cell may not have an overlapping area with other base station cells, and the other base station cells may be backpack base station cells or non-backpack base station cells, such as optical fiber base station cells.

[0036] When the UE moves at a fast speed, it is easy for the UE to move out of the current backpack base station cell. In the prior art, the backpack base station cannot know the movement trajectory of the UE. Therefore, after the UE moves out of the backpack base station cell, the backpack base station cannot reasonably manage the RRC connection between it and the UE, which may cause a waste of network resources of the backpack base station.

[0037] For example, after the UE leaves the backpack base station cell, the backpack base station manages the RRC connection by suspending the RRC connection and retaining the UE context for a long time. If the UE's movement trajectory is to enter the next base station cell after leaving the backpack base station cell and will not return to the backpack base station cell, then retaining the UE context for a long time will occupy the memory resources of the backpack base station.

[0038] For another example, after the UE leaves the backpack base station cell, the backpack base station may release the RRC connection and delete the UE's context, but the UE's movement trajectory is that it will return to the backpack base station cell in a short time after leaving the backpack base station. Then, after the UE returns to the backpack base station cell, it needs to re-establish an RRC connection with the backpack base station cell and send context information to the backpack base station. In this way, the backpack base station needs to respond to the UE's RRC establishment request and re-execute the RRC connection establishment process, wasting the signaling resources of the backpack base station.

[0039] In addition, when the UE moves out of the backpack base station cell, the backpack base station does not have time to release the RRC connection between it and the UE. If the UE moves to an adjacent base station cell, the UE assumes that the wireless link with the backpack base station has failed. When the UE moves to the coverage area of ​​the next base station cell, it will initiate a wireless link recovery process. However, before the UE moves to the next base station cell, the backpack base station does not pass the UE's context information to the next base station, and the UE's wireless link recovery process will fail. The UE needs to re-initiate the RRC connection establishment process, resulting in a more cumbersome signaling interaction process related to the UE.

[0040] Based on this, an embodiment of the present application provides a connection management method based on a backpack base station. Based on the connection management method, the backpack base station can reasonably manage the RRC connection between the backpack base station and the UE.

[0041] Figure 3 A signaling interaction diagram of a connection management method based on a satellite backpack base station provided in an embodiment of the present application, the method includes the following steps 301 to 303:

[0042] Step 301, the backpack base station determines the first information, the first information is used to assist the user equipment UE in the backpack base station cell to perform motion control, and the first information is also used to instruct the UE to feedback the UE's predicted motion trajectory to the backpack base station before moving out of the backpack base station cell, and the motion trajectory is used by the backpack base station to manage the RRC connection between the backpack base station and the UE.

[0043] In the present application, the functions of the first information include: assisting the UE in the backpack base station cell to perform motion control, and instructing the UE to feedback the UE's predicted motion trajectory to the backpack base station before moving out of the backpack base station cell.

[0044] The first information includes information of one or more base stations associated with the UE; wherein, the one or more base stations include the backpack base station, or the one or more base stations include the backpack base station and one or more first base stations whose distances from the backpack base station meet preset conditions.

[0045] In some embodiments, the UE may be a terminal device with mobility, such as a drone or an aircraft, and its moving speed is greater than or equal to a preset speed threshold. The preset speed threshold may be pre-set by the UE according to actual needs before moving.

[0046] The first base station meets the preset condition including: the distance between the first base station and the backpack base station is greater than a distance threshold.

[0047] In some embodiments, before determining the first information, the backpack base station may determine the distance threshold according to actual needs, so that the first base station is within the communication distance of the backpack base station.

[0048] It should be noted that if the first base station is within the communication distance of the backpack base station, it means that the first base station and the backpack base station can communicate wirelessly. However, this does not mean that the cell maintained by the first base station has an overlapping area with the cell maintained by the backpack base station.

[0049] The solution of this application is developed for the scenario where the cell maintained by the backpack base station is an isolated cell. Figure 2B As shown, an isolated cell refers to a cell maintained by the current backpack base station and at least one of its adjacent cells having no overlapping area, and the current backpack base station cell cannot provide information about adjacent cells.

[0050] In step 301, the base station associated with the UE may be predetermined, and the UE may move to a base station within the coverage of its cell. The type of the base station associated with the UE may be a backpack base station or a non-backpack base station. Exemplarily, the type of the base station associated with the UE may be a fiber optic base station.

[0051] like Figure 1 As shown, a backpack base station is a base station that uses a wireless interface and a satellite as an intermediate communication node to establish a communication connection with a core network element. A fiber optic base station is a base station that uses a fiber optic interface to directly establish a connection with a core network element, and a fiber optic base station does not need a satellite as an intermediate communication node.

[0052] It can be understood that there are two situations for the first information: situation (1) is: information of one of the backpack base stations; situation (2) is: information of one of the backpack base stations and information of one or more first base stations whose distances from the backpack base station meet preset conditions. The type of the first base station can be a backpack base station or a non-backpack base station. Exemplarily, the type of the base station associated with the UE can be a fiber optic base station.

[0053] Case (1) may be applicable to a scenario where there is no adjacent base station near the backpack base station. In this case, the UE may determine, based on the first information, that the current cell has no adjacent cell, thereby ensuring that the UE moves within the backpack base station cell as much as possible.

[0054] Case (2) can be applicable to the scenario where there are adjacent base stations near the backpack base station. In this way, the UE can determine the coverage area of ​​the backpack base station and the nearby base stations based on the first information. In case (2), the distance between the adjacent one or more base stations and the backpack base station meets the preset conditions, thereby ensuring that the UE moves in the area with signal coverage as much as possible and avoiding the UE from losing connection with the base station as much as possible.

[0055] In the existing protocol, the backpack base station will not send relevant information about itself or other base stations. This application notifies the UE of the relevant information of the base station and assists the UE in motion control, thereby ensuring that the UE moves within the coverage of the base station cell as much as possible.

[0056] Whether the backpack base station sends the first information in case 1 or case 2 can be determined by the backpack base station according to the interaction between base stations.

[0057] Furthermore, if the backpack base station detects that there is no neighboring base station within a preset range, the backpack base station sends the information shown in situation (1) to the UE.

[0058] If the backpack base station detects that there are one or more first base stations within a preset range nearby, the backpack base station sends the information shown in situation (2) to the UE.

[0059] When the first information includes information of the backpack base station but does not include information of the first base station, the first information includes at least one of the following: location information of the backpack base station, a first coverage radius of the backpack base station cell, and a maximum duration for which the UE is allowed to leave the backpack base station cell.

[0060] In the case where the first information includes information of the backpack base station and information of one or more first base stations, the first information includes at least one of the following: location information of the backpack base station, location information of one or more first base stations, a first coverage radius of the backpack base station cell, and a second coverage radius of the first base station cell.

[0061] The location information may be a Global Positioning System (GPS) coordinate; that is, the location information of the backpack base station may be the GPS coordinate of the backpack base station, and the location information of the first base station may be the GPS coordinate of the first base station, which is determined by the longitude and latitude of the base station. Wherein, when there are multiple base stations associated with the UE, the locations of the multiple base stations are different.

[0062] When the base stations associated with the UE include a backpack base station and a first base station, the first coverage radius of the backpack base station cell and the second coverage radius of the first base station cell may be the same or different, and this embodiment of the present application does not limit this.

[0063] The maximum time duration for which the UE is allowed to leave the backpack base station can be pre-set according to actual needs; the maximum time duration for which the backpack base station allows different UEs to leave the backpack base station can be different, or can be partially or completely the same, and this embodiment of the present application does not limit this.

[0064] Step 302: The backpack base station sends first information to the UE.

[0065] Correspondingly, the UE receives the first information.

[0066] Step 303: The UE controls the communication behavior between the UE and the backpack base station when the UE moves based on the motion state of the UE and the first information.

[0067] The backpack base station sends the first information to the UE. After the UE receives the first information, the UE can control the communication behavior with the backpack base station when the UE moves based on its own motion state and the first information.

[0068] Specifically, the UE can plan a motion trajectory based on its own motion state and the first information and determine the motion parameters of the UE when moving along the motion trajectory, such as moving speed, height, acceleration and other parameters, and then notify the backpack base station of its motion trajectory based on the motion parameters.

[0069] In some embodiments, if the movement trajectory planned by the UE indicates that the UE moves within the backpack base station cell, that is, the UE will not move out of the backpack base station cell, the UE does not notify the backpack base station of its movement trajectory; if the movement trajectory planned by the UE indicates that the UE will move out of the backpack base station cell, the UE needs to inform the backpack base station of its movement trajectory before moving out of the backpack base station cell, so that the backpack base station can manage the RRC connection between the UE and the backpack base station based on the UE's movement trajectory.

[0070] In some embodiments, the movement trajectory of the UE includes the UE leaving the current backpack base station cell and returning to the backpack base station cell, or the UE leaving the current backpack base station cell and entering a first target base station among one or more first base stations.

[0071] The base station associated with the UE may include a backpack base station but not the first base station, or may include a backpack base station and one or more first base stations. The base stations associated with the UE are different, the cells maintained by the base stations associated with the UE are also different, and the content of the first information is also different. The first information will affect the predicted motion trajectory of the UE.

[0072] Exemplarily, when the first information includes information of the backpack base station, the movement trajectory of the UE includes leaving the backpack base station cell and then returning to the backpack base station cell.

[0073] When the content of the first information includes information of the backpack base station and information of one or more first base stations, the movement trajectory of the UE includes returning to the backpack base station cell after leaving the backpack base station cell, and entering the first target base station cell after leaving the backpack base station cell.

[0074] The movement trajectory of the UE is determined by the application layer of the UE. The application layer determines whether the movement trajectory of the UE leaves the backpack base station cell and then returns to the backpack base station cell, or leaves the backpack base station cell and enters the adjacent first target base station cell based on the received user flight instructions, its own flight speed, the cell coverage radius of the backpack base station and the cell coverage radius of the adjacent base station.

[0075] For example, the user's flight instruction instructs the UE to fly along the current direction within a preset time, the current direction points to the first target base station cell, the UE's own flight speed is fast, and the coverage of the first target base station cell is large, so the UE may fly to a neighboring cell in a short time. In this case, the UE determines that its motion trajectory is to enter the first target base station cell after leaving the backpack base station.

[0076] Exemplarily, the UE's flight instruction instructs the UE to fly freely within a preset time, the UE's flight speed is slow, the coverage range of the first target base station cell is small, and the UE takes a long time to fly to the first target base station cell. In this case, the UE determines that its movement trajectory is to leave the backpack base station cell and then return to the backpack base station cell.

[0077] The movement trajectory of the UE is used by the backpack base station to manage the RRC connection between the backpack base station and the UE, so that the backpack base station can perform reasonable operations on the RRC connection according to the movement trajectory of the UE to improve the utilization rate of the network resources of the backpack base station.

[0078] Among them, the way in which the backpack base station manages the RRC connection is different depending on the movement trajectory of the UE.

[0079] Furthermore, an embodiment of the present application provides a connection management method, which describes how the backpack base station manages the RRC connection when the base station associated with the UE includes a backpack base station, the first information includes information of the backpack base station, and the UE's movement trajectory is leaving the backpack base station and then returning to the backpack base station.

[0080] Figure 4Schematic diagram of signaling interaction of the connection management method based on the satellite backpack base station of this embodiment; the connection management method includes the following steps 401 to 409:

[0081] Step 401: The backpack base station determines first information, where the first information includes information of the backpack base station.

[0082] The first information is used to assist the UE in motion control, and the first information is at least used to instruct the UE to feed back the predicted motion trajectory of the UE to the backpack base station before moving out of the backpack base station cell.

[0083] In this embodiment, the first information includes at least one of the following: location information of the backpack base station, a first coverage radius of the backpack base station cell, and a maximum time duration allowed for the UE to leave the backpack base station cell. The first information is used to assist the UE in motion control. Exemplarily, the maximum time duration allowed for the UE to leave the backpack base station cell is short. If other base stations are far away from the backpack base station, the backpack base station may not be able to move to the coverage area of ​​other base stations. It may move out of the backpack base station and return to the backpack base station within the maximum time duration allowed by the backpack base station.

[0084] In some embodiments, the maximum time that the backpack base station allows the UE to leave the backpack base station cell is related to the importance of the UE's service. The higher the importance of the UE's current service, the shorter the time that the backpack base station allows the current service to be interrupted, and the smaller the maximum time that the backpack base station allows the UE to leave. The lower the importance of the UE's current service, the longer the maximum time that the backpack base station allows the UE to leave.

[0085] Step 402: The backpack base station sends first information to the UE.

[0086] Correspondingly, the UE receives the first information.

[0087] Step 403: The UE determines second information based on the motion state of the UE and the first information, where the second information is used to indicate that the motion trajectory predicted by the UE is that the UE leaves the backpack base station cell and then returns to the backpack base station cell.

[0088] The motion state of the UE includes the moving speed and moving direction of the UE. The UE can determine the motion trajectory of the UE and determine the motion parameters based on part or all of the current moving speed, moving direction, location information of the backpack base station, the first coverage radius of the backpack base station cell, and the maximum time allowed for the UE to leave the backpack base station cell.

[0089] The UE determines the second information based on the UE's motion state and the first information; specifically, if the UE's moving speed is slow, the maximum time allowed for the UE to leave is short, and the first information only includes the information of the backpack base station, the UE can determine the third information based on the UE's motion state and the first information to control it to continue moving in the current direction until it moves out of the backpack base station cell and returns to the backpack base station cell as soon as possible.

[0090] Step 404: Before leaving the backpack base station cell, the UE sends second information to the backpack base station.

[0091] Correspondingly, the backpack base station receives the second information.

[0092] The second information may be a Boolean variable, and the second information is used to indicate that the predicted movement trajectory of the UE is that the UE leaves the backpack base station cell and then returns to the backpack base station cell. Specifically, the second information is used to indicate the time when the UE returns to the backpack base station cell.

[0093] In some embodiments, the time when the UE leaves the backpack base station cell is related to the moving speed of the UE and the distance between the UE's current position and the boundary of the backpack base station cell; the greater the moving speed of the backpack base station, the earlier the UE may move to the boundary of the backpack base station cell, that is, the time when the UE leaves the backpack base station cell is closer to the current time; the smaller the moving speed of the backpack base station, the farther the time when the UE leaves the backpack base station cell is from the current time.

[0094] The latest return time of the UE to the backpack base station cell is related to the UE's moving speed. The faster the UE's moving speed, the closer the latest return time is to the time when the UE leaves the backpack base station cell. The slower the UE's moving speed, the farther the latest return time is from the time when the UE leaves the backpack base station cell.

[0095] In some embodiments, the second information includes the time when the UE leaves the backpack cell, but does not include information indicating the latest return time to the backpack base station cell, that is, the information indicating the latest return time to the backpack base station cell can be transmitted in a default manner, which can reduce signaling overhead. In this way, after the backpack base station receives the second information, it knows when the UE leaves the backpack base station, and the backpack base station can maintain the maximum duration allowed for the UE to leave, thereby determining the latest return time for the UE to return to the backpack base station cell based on the time when the UE leaves the backpack cell and the maximum duration allowed for the UE to leave.

[0096] In some other embodiments, the second information includes the time when the UE leaves the backpack cell and the latest return time for the UE to return to the backpack base station cell. In this way, after receiving the second information, the backpack base station knows when the UE leaves the backpack base station, and the backpack base station can directly determine the time when the UE leaves the backpack cell and the latest return time when the UE returns to the backpack base station cell based on the second information.

[0097] Step 405: When the UE leaves the backpack base station cell, the backpack base station suspends the RRC connection between the UE and the backpack base station.

[0098] Since the UE will return to the backpack base station cell, the RRC connection between the UE and the backpack base station will continue to be used after the UE returns to the backpack base station cell. In this case, the backpack base station suspends the RRC connection. The duration of the RRC suspension is determined by the maximum duration that the backpack base station allows the UE to leave.

[0099] It can be understood that when the UE transmits data services in the current backpack base station cell, it needs to establish an RRC connection with the backpack base station. The UE can perform signaling interaction with the backpack base station through the RRC connection to meet communication needs. When establishing an RRC connection, the UE and the base station need to establish context information interaction. The UE context includes configuration information related to the UE, such as: terminal capability information, authentication information, service quality category identifier (QoS Class Identifier, QCI), etc. These context information are transmitted to the backpack base station through the RRC connection. The backpack base station needs to save the context information for the backpack base station to authenticate the UE, schedule transmission resources, manage and track, etc.

[0100] The backpack base station suspends the RRC connection, which means that no data is transmitted between the backpack base station and the UE, while retaining the context information of the UE. The context information of the UE is retained to provide the backpack base station with necessary information for performing the RRC connection recovery operation without re-establishing the connection; performing the RRC connection recovery operation at least reduces the steps of establishing the context compared to performing the RRC connection establishment operation, which can reduce the network resource overhead of the backpack base station.

[0101] Step 406: The backpack base station determines a first duration based on the second information, where the first duration indicates a maximum duration allowed for the backpack base station to retain the context of the UE.

[0102] Alternatively, the first duration may also be determined by the UE, and the UE sends information of the first duration to the backpack base station after sending the second information.

[0103] This embodiment does not limit the execution order of step 405 and step 406.

[0104] The maximum time for the backpack base station to retain the UE context is related to the latest return time of the UE to the backpack base station cell. It can also be understood that the maximum time for the backpack base station to retain the UE context is related to the maximum time for the UE to leave the backpack base station.

[0105] Step 407 , the backpack base station determines whether it has received an RRC connection recovery request sent by the UE within a first time period after the departure time. If so, execute step 408 ; otherwise, execute step 409 .

[0106] Step 408: The backpack base station performs an RRC connection recovery operation to recover the RRC connection between the backpack base station and the UE.

[0107] It can be understood that if the backpack base station receives the RRC connection recovery request sent by the UE within the maximum time allowed for retaining the context, the backpack base station executes step 408 and can restore the RRC connection based on the retained context, so that the UE switches to the connected state.

[0108] Step 409: The backpack base station releases the suspended RRC connection and deletes the context of the UE.

[0109] It can be understood that if the backpack base station waits for a time longer than the maximum time allowed for the backpack base station to retain the context and does not receive a request to resume the connection from the UE, the backpack base station releases the suspended RRC connection and deletes the UE's context at the same time to provide connection resources and memory resources to other UEs to make full use of the network resources of the backpack base station.

[0110] In this embodiment, the backpack base station informs the UE of the location information, coverage radius and the maximum time that the backpack base station allows the UE to leave the backpack base station cell, so as to assist the UE in motion control, so that the UE can return to the backpack cell as much as possible within a specific time period; at the same time, the backpack base station manages the RRC connection based on the second information returned by the UE, as shown in steps 404 to 408, the backpack base station suspends the RRC connection when the UE leaves the backpack base station cell, and restores the RRC connection when the UE returns to the backpack base station cell. In this way, frequent establishment of RRC connections can be avoided, thereby reducing the signaling interaction process between the UE and the backpack base station, reducing the time required for the UE to access the backpack base station again, and thus shortening the communication delay.

[0111] The present application further provides a connection management method, which describes how the backpack base station manages the RRC connection when the base stations associated with the UE include a backpack base station and one or more first base stations, the first information includes information of the backpack base station and one or more base stations, and the movement trajectory of the UE is to leave the backpack base station cell and then enter the first target base station cell.

[0112] The signaling interaction diagram of the connection management method is as follows Figure 5 As shown, the method comprises the following steps:

[0113] Step 501: The backpack base station determines first information, where the first information includes information of the backpack base station and one or more first base stations.

[0114] The first information is used to assist the UE in motion control, and the first information is also used to instruct the UE to feedback the predicted motion trajectory of the UE to the backpack base station before moving out of the backpack base station cell; the motion trajectory is used by the backpack base station to manage the RRC connection between the backpack base station and the UE.

[0115] The movement trajectory of the UE includes the UE leaving the current backpack base station cell and returning to the backpack base station cell, or the UE leaving the current backpack base station cell and entering a first target base station among one or more first base stations.

[0116] Step 502: The backpack base station sends first information to the UE, where the first information includes: location information of the backpack base station, location information of one or more first base stations, a first coverage radius of the backpack base station cell, and a second coverage radius of the first base station cell.

[0117] Correspondingly, the UE receives the first information.

[0118] Step 503, the UE determines third information based on the UE's motion state and the first information, where the third information is used to indicate that the UE's predicted motion trajectory is that the UE leaves the backpack base station cell and enters the first target base station cell, and the one or more first base stations include the first target base station.

[0119] The one or more first base stations include a first target base station, that is, the first target base station is a base station in the one or more first base stations.

[0120] In some embodiments, the first target base station cell is a base station that is closest to the backpack base station and / or has the largest second coverage range among the one or more first base stations.

[0121] The motion state of the UE includes the moving speed and moving direction of the UE. The UE can predict its own moving trajectory and determine the motion parameters based on part or all of the current moving speed, moving direction, location information of the backpack base station, location information of one or more first base stations, the first coverage radius of the backpack base station cell, and the second coverage radius of the first base station cell.

[0122] The UE determines third information based on the motion state of the UE and the first information;

[0123] Specifically, the first information indicates that the first coverage radius of the backpack base station cell is small, the second coverage radius of the first base station cell is large, the distance between the first base station cell and the second base station cell is close, and the movement state of the UE indicates that the speed of the UE is fast. The UE determines the third information based on the above first information and the movement state of the UE to instruct it to continue moving in the current direction until it moves out of the backpack base station cell, and then controls itself to enter the first target base station cell.

[0124] Step 504: Before leaving the backpack base station cell, the UE sends third information to the backpack base station.

[0125] In some embodiments, the third information includes third time information when the UE enters the first target base station cell and a cell identifier of the first target base station cell. The cell identifier may be a physical cell identifier (PCI).

[0126] If the UE predicts that its movement trajectory is to leave the backpack base station cell and then enter the first target base station cell, the UE sends the third time information of the UE entering the first target base station cell and the cell identifier of the first target base station cell to the backpack base station, so that the backpack base station performs signaling interaction with the first target base station cell in advance, notifies the first target base station cell that the UE is about to enter the first target base station cell, and enables the first target base station cell to perform relevant configurations for RRC connection recovery in advance.

[0127] Step 505: The backpack base station sends fourth information to the first target base station, where the fourth information is used to notify the first target base station to perform relevant configurations for RRC connection recovery in advance.

[0128] In some embodiments, the fourth information includes a cell identifier of the first base station cell entered by the UE, the third time information and relevant information of the UE. The relevant information of the UE includes identity information and service information of the UE.

[0129] In some embodiments, the relevant information of the UE includes context information of the UE.

[0130] After the UE sends the third time information of its entry into the cell of the first target base station and the cell identifier of the first target base station cell to the backpack base station, the backpack base station knows that the UE is about to leave the backpack base station. The backpack base station does not need to initiate the RRC release process. Instead, before the UE reaches the cell of the first target base station, the backpack base station sends the third time information and relevant information of the UE to the first target base station through the core network, so that the first target base station can perform relevant configurations for RRC connection recovery in advance.

[0131] In this embodiment, the movement trajectory of the UE is to enter the first target base station cell after leaving the backpack base station cell. After the backpack base station sends the fourth message to the first target base station, if it is determined that the UE will not return to the backpack base station, the following steps 506a can be performed. If it is not determined whether the UE will return to the backpack base station, steps 506b to 509b are performed:

[0132] Step 506a: When the UE leaves the backpack base station cell, the backpack base station releases the RRC connection between the backpack base station and the UE and deletes the context of the UE.

[0133] It can be understood that if the backpack base station determines that the UE will not return to the backpack base station after moving to the coverage of the first target base station cell, or the UE will not return to the backpack base station within the maximum time allowed by the backpack base station, the RRC connection established between the UE and the backpack base station may no longer be used. Therefore, the RRC connection can be released and the UE context can be deleted to provide communication resources for other UEs.

[0134] Step 506b: The backpack base station retains the context of the UE after the UE leaves the backpack base station cell.

[0135] If the backpack base station is not sure whether the UE will return to the backpack base station after leaving the backpack base station and entering the first target base station cell, the backpack base station can retain the UE context after the UE leaves the backpack base station cell. If the UE subsequently returns to the backpack base station within the specified time, the RRC connection can be restored based on the retained UE context.

[0136] In some embodiments, the backpack base station can determine whether the UE will return to the backpack base station by whether the return indication information of the UE is received within a preset time period, or the backpack base station can determine whether the UE will return to the backpack base station based on past experience.

[0137] Step 507b, the backpack base station determines whether it has received an RRC connection recovery request sent by the UE within the second time period after the UE leaves the backpack base station cell. If the RRC connection request sent by the UE is received, execute step 508b; if the RRC connection request sent by the UE is not received, execute step 509b.

[0138] In some embodiments, the first duration and the second duration may be the same, both being the maximum duration that the backpack base station allows the UE to leave.

[0139] Alternatively, the first duration and the second duration are different, and the second duration can be preset according to actual needs.

[0140] Step 508b: The backpack base station performs an RRC connection recovery operation.

[0141] Step 509b: The backpack base station releases the RRC connection between the backpack base station and the UE, and deletes the context of the UE.

[0142] In this embodiment, if the movement trajectory of the UE is that the UE enters the first target base station cell after leaving the backpack base station cell, the backpack base station releases the RRC connection and deletes the UE's context when it is determined that the UE will not return to the backpack base station cell, so as to provide communication resources for other UEs. When the backpack base station is uncertain whether the UE will return to the backpack base station cell, it can first retain the UE's context information. If the UE does not return to the backpack base station within the specified time, the RRC connection between the backpack base station and the UE is released, and the UE's context is deleted. If the UE returns to the backpack base station within the specified time, the RRC connection established between them is restored based on the retained UE context information, thereby reducing the additional signaling interaction between the backpack base station and the UE due to the movement of the UE, reducing the signaling overhead of the backpack base station, and thus reducing the power overhead of the backpack base station.

[0143] The present application embodiment provides a connection management method based on a satellite backpack base station, such as Figure 6 As shown, the connection management method is Figure 3 On the basis of the connection management method shown, step 300 is added before step 301, and step 300 is: the backpack base station receives a request message sent by the UE, and the request message is used to request the backpack base station to send first information for assisting the UE in motion control.

[0144] Correspondingly, after receiving the request message, the backpack base station determines the first information based on the request message.

[0145] In this embodiment, if the UE needs to perform a mobile operation, the UE sends a request message to the backpack base station to request the backpack base station to assist the UE in performing motion control.

[0146] Based on the foregoing embodiments, an embodiment of the present application provides a communication device, which includes the modules included and the units included in the modules, which can be implemented by a processor; of course, it can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA), etc.

[0147] Figure 7 Schematic diagram of the structure of the connection management device based on the satellite backpack base station in the embodiment of the present application. Figure 7 As shown, the connection management device 70 based on the satellite backpack base station includes a first determination module 71 and a first sending module 72; wherein,

[0148] The first determination module 71 is used to determine first information, where the first information is used to assist the UE in motion control, and the first information is also used to instruct the UE to feedback the predicted motion trajectory of the UE to the satellite backpack base station before moving out of the satellite backpack base station cell, and the motion trajectory is used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE.

[0149] The first sending module 72 is configured to send the first information to the UE.

[0150] In some embodiments, when the one or more base stations include the satellite backpack base station, the first information includes: location information of the satellite backpack base station, a first coverage radius of the satellite backpack base station cell, and a maximum time duration allowing the UE to leave the satellite backpack base station cell.

[0151] In some embodiments, when the one or more base stations include the satellite backpack base station, the first information includes at least one of the following: location information of the satellite backpack base station, a first coverage radius of the satellite backpack base station cell, and a maximum time duration during which the UE is allowed to leave the satellite backpack base station cell.

[0152] In some embodiments, the connection management device 70 based on the satellite backpack base station also includes a first receiving module, the first receiving module is used to receive the second information sent by the UE before leaving the satellite backpack base station cell; the second information is used to indicate that the predicted movement trajectory of the UE is that the UE returns to the satellite backpack base station cell after leaving the satellite backpack base station cell; based on the second information, a first duration is determined, and the first duration indicates the duration for which the context of the UE is allowed to be retained;

[0153] In some embodiments, the connection management device 70 based on the satellite backpack base station also includes a first management module, and the first management module is used to suspend the RRC connection between the UE and the satellite backpack base station when the UE leaves the satellite backpack base station cell.

[0154] In some embodiments, the first management module is also used to perform an RRC connection recovery operation to restore the RRC connection between the satellite backpack base station and the UE if an RRC connection recovery request sent by the UE is received within a first time period after the departure time; if the UE does not receive the RRC connection recovery request sent by the UE within the first time period after the departure time, release the suspended RRC connection and delete the context of the UE.

[0155] In some embodiments, the second information includes first time information, and the first time information indicates the moment when the UE leaves the satellite backpack base station cell. Then determining the first duration includes: determining that the maximum duration allowed for the UE to leave the satellite backpack base station is the first duration; or, the second information includes first time information and second time information, and the second time information indicates the latest return time for the UE to return to the satellite backpack base station cell. Then determining the first duration includes: determining the moment when the UE leaves the satellite backpack base station as the starting time of the first duration, and determining the latest return time for the UE to return to the satellite backpack base station cell as the end time of the first duration.

[0156] In some embodiments, when the one or more base stations include the satellite backpack base station and the one or more first base stations, the first information includes: location information of the satellite backpack base station, location information of the one or more first base stations, the first coverage radius of the satellite backpack base station cell, and the second coverage radius of the first base station cell.

[0157] In some embodiments, the first receiving module is also used to receive third information sent by the UE before leaving the satellite backpack base station cell; the third information is used to indicate that the predicted movement trajectory of the UE is that the UE enters the first target base station cell after leaving the satellite backpack base station cell, and the one or more first base stations include the first target base station; the first sending module 72 is also used to send fourth information to the first target base station, and the fourth information is used to notify the first target base station to pre-perform relevant configurations for RRC connection recovery.

[0158] In some embodiments, the third information includes: third time information of the UE entering the first target base station cell and the cell identifier of the first target base station cell; the fourth information includes: the third time information and relevant information of the UE.

[0159] In some embodiments, the first management module is also used to release the RRC connection between the satellite backpack base station and the UE and delete the context of the UE when the UE leaves the satellite backpack base station cell; or, retain the context of the UE after the UE leaves the satellite backpack base station cell; if an RRC connection request sent by the UE is received within a second time period after the UE leaves the satellite backpack base station, perform an RRC connection recovery operation; if no RRC connection request sent by the UE is received within a second time period after the UE leaves the satellite backpack base station, release the RRC connection between the satellite backpack base station and the UE and delete the context of the UE.

[0160] In some embodiments, the first receiving module is further used to receive a request message sent by the UE, where the request message is used to request the satellite backpack base station to send first information for assisting the UE in motion control.

[0161] Based on the foregoing embodiments, an embodiment of the present application further provides a connection management device, which includes the modules included and the units included in the modules, and can be implemented by a processor; of course, it can also be implemented by a specific logic circuit; in the implementation process, the processor can be a CPU, MPU, DSP or FPGA, etc.

[0162] Figure 8 Schematic diagram of the structure of the connection management device based on the satellite backpack base station in the embodiment of the present application. Figure 8 As shown, the connection management device 80 based on the satellite backpack base station includes a second receiving module 81 and a control module 82; wherein,

[0163] The second receiving module 81 is used to receive the first information sent by the satellite backpack base station, where the first information is used to instruct the UE to feedback the predicted movement trajectory of the UE to the satellite backpack base station before moving out of the satellite backpack base station cell, and the movement trajectory is used by the satellite backpack base station to manage the RRC connection between the satellite backpack base station and the UE.

[0164] The control module 82 is used to control the communication behavior of the UE with the satellite backpack base station when the UE moves based on the motion state of the UE and the first information.

[0165] In some embodiments, the first information includes information of one or more base stations associated with the UE; wherein the one or more base stations include the satellite backpack base station, or the one or more base stations include the satellite backpack base station and one or more first base stations whose distances from the satellite backpack base station meet preset conditions.

[0166] In some embodiments, when the one or more base stations include the satellite backpack base station, the first information includes at least one of the following: location information of the satellite backpack base station, a first coverage radius of the satellite backpack base station cell, and a maximum time duration allowed for the UE to leave the satellite backpack base station cell.

[0167] In some embodiments, the connection management device 80 based on the satellite backpack base station also includes a second determination module and a second sending module. The second determination module is used to determine second information based on the motion state and the first information, and the second information is used to indicate that the predicted motion trajectory of the UE is that the UE leaves the satellite backpack base station cell and then returns to the satellite backpack base station cell; the second sending module is used to send the second information to the satellite backpack base station before leaving the satellite backpack base station cell.

[0168] In some embodiments, the second information includes: first time information when the UE leaves the satellite backpack base station cell, or the second information includes: the first time information and second time information when the UE returns to the satellite backpack base station cell.

[0169] In some embodiments, the connection management device 80 based on the satellite backpack base station includes a second management module, which is used to initiate an RRC connection recovery request to the satellite backpack base station when the UE returns to the satellite backpack base station cell within a first time period after leaving the satellite backpack base station cell, so as to request the restoration of the RRC connection between the UE and the satellite backpack base station cell; wherein the first time period is related to the maximum time period allowed for the UE to leave the satellite backpack base station cell, or the first time period is related to the latest return time indicated by the second time information.

[0170] In some embodiments, a second determination module is used to determine third information based on the motion state and the first information; the third information is used to indicate that the predicted motion trajectory of the UE is that the UE enters a first target base station cell after leaving the satellite backpack base station cell, and the one or more first base stations include a first target base station; the second sending module is used to send the third information to the satellite backpack base station before leaving the satellite backpack base station cell.

[0171] In some embodiments, the second sending module is used for the UE to send a request message to the satellite backpack base station, and the request message is used to request the satellite backpack base station to send a first information for assisting the UE in motion control.

[0172] The description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of the present application, please refer to the description of the method embodiment of the present application for understanding.

[0173] It should be noted that in the embodiments of this application Figure 7 and Figure 8The division of modules in the connection management device based on the satellite backpack base station shown is schematic, which is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or it can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. It can also be implemented in the form of a combination of software and hardware.

[0174] It should be noted that in the embodiments of the present application, if the above-mentioned connection management method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling an electronic device to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0175] The embodiment of the present application provides an electronic device, which may be a UE or a satellite backpack base station. Fig. 9 A schematic diagram of the hardware entity of the electronic device according to the embodiment of the present application is shown in FIG. Fig. 9 As shown, the electronic device 90 includes a memory 91 and a processor 92, wherein the memory 91 stores a computer program that can be run on the processor 92, and the processor 92 implements the steps in the method provided in the above embodiment when executing the program.

[0176] It should be noted that the memory 91 is configured to store instructions and applications executable by the processor 92, and can also cache data to be processed or already processed by the processor 92 and various modules in the electronic device 90 (for example, image data, audio data, voice communication data, and video communication data), which can be implemented through flash memory (FLASH) or random access memory (Random Access Memory, RAM).

[0177] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the connection management method provided in the above embodiment are implemented.

[0178] An embodiment of the present application provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the steps of the connection management method provided in the above method embodiment.

[0179] It should be noted here that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium, storage medium and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0180] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0181] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0182] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0183] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as: multiple modules or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or modules can be electrical, mechanical or other forms.

[0184] The modules described above as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules; they may be located in one place or distributed on multiple network units; some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0185] In addition, all functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may be a separate unit, or two or more modules may be integrated into one unit; the above-mentioned integrated modules may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0186] A person skilled in the art can understand that: all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, read-only memories (ROM), magnetic disks or optical disks.

[0187] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling an electronic device to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0188] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0189] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0190] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0191] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A connection management method based on a satellite backpack base station, characterized in that: The method comprises: The satellite backpack base station determines first information, where the first information is used to assist a user equipment UE in a cell of the satellite backpack base station in motion control, and the first information is also used to instruct the UE to feedback to the satellite backpack base station a predicted motion trajectory of the UE before moving out of the cell of the satellite backpack base station, where the motion trajectory is used by the satellite backpack base station to manage a radio resource control RRC connection between the satellite backpack base station and the UE; The satellite backpack base station sends the first information to the UE; wherein the first information includes information of one or more base stations associated with the UE; the one or more base stations include the satellite backpack base station; In the case where the one or more base stations include the satellite backpack base station, the first information includes at least one of the following: location information of the satellite backpack base station, a first coverage radius of the satellite backpack base station cell, and a maximum duration for which the UE is allowed to leave the satellite backpack base station cell.

2. The method according to claim 1, characterized in that The one or more base stations also include one or more first base stations whose distances from the satellite backpack base station meet preset conditions.

3. The method according to claim 1, characterized in that The method further comprises: The satellite backpack base station receives second information sent by the UE before leaving the satellite backpack base station cell; the second information is used to indicate that the predicted movement trajectory of the UE is that the UE returns to the satellite backpack base station cell after leaving the satellite backpack base station cell; The satellite backpack base station determines a first duration based on the second information, where the first duration indicates a maximum duration allowed for the satellite backpack base station to retain the context of the UE.

4. The method according to claim 3, characterized in that The method further comprises: When the UE leaves the satellite backpack base station cell, the satellite backpack base station suspends the RRC connection between the UE and the satellite backpack base station.

5. The method according to claim 4, characterized in that The method further comprises: If the satellite backpack base station receives an RRC connection recovery request sent by the UE within a first time period after the UE leaves, the satellite backpack base station performs an RRC connection recovery operation to restore the RRC connection between the satellite backpack base station and the UE; If the UE does not receive the RRC connection recovery request sent by the UE within a first time period after the departure time, the satellite backpack base station releases the suspended RRC connection and deletes the context of the UE.

6. The method according to claim 5, characterized in that The second information includes first time information, and the first time information indicates the time when the UE leaves the satellite backpack base station cell. Then determining the first duration includes: determining that the maximum duration allowed for the UE to leave the satellite backpack base station is the first duration; or, The second information includes first time information and second time information, and the second time information indicates the latest return time of the UE to return to the satellite backpack base station cell. Then determining the first duration includes: determining the time when the UE leaves the satellite backpack base station as the starting time of the first duration, and determining the latest return time of the UE to return to the satellite backpack base station cell as the end time of the first duration.

7. The method according to claim 2, characterized in that In the case where the one or more base stations include the satellite backpack base station and the one or more first base stations, the first information includes: location information of the satellite backpack base station, location information of the one or more first base stations, the first coverage radius of the satellite backpack base station cell and the second coverage radius of the first base station cell.

8. The method according to claim 7, characterized in that The method further comprises: The satellite backpack base station receives third information sent by the UE before leaving the satellite backpack base station cell; the third information is used to indicate that the predicted movement trajectory of the UE is that the UE enters a first target base station cell after leaving the satellite backpack base station cell, and the one or more first base stations include the first target base station; The satellite backpack base station sends fourth information to the first target base station, where the fourth information is used to notify the first target base station to perform relevant configurations for RRC connection recovery in advance.

9. The method according to claim 8, characterized in that The third information includes: first time information of the UE leaving the satellite backpack base station cell, third time information of the UE entering the first target base station cell, and a cell identifier of the first target base station cell; The fourth information includes: the third time information and relevant information of the UE.

10. The method according to claim 9, characterized in that The method further comprises: The satellite backpack base station releases the RRC connection between the satellite backpack base station and the UE and deletes the context of the UE when the UE leaves the satellite backpack base station cell; or The satellite backpack base station retains the context of the UE after the UE leaves the satellite backpack base station cell; if an RRC connection request sent by the UE is received within a second time period after the UE leaves the satellite backpack base station, an RRC connection recovery operation is performed; if no RRC connection request sent by the UE is received within a second time period after the UE leaves the satellite backpack base station, the RRC connection between the satellite backpack base station and the UE is released and the context of the UE is deleted.

11. The method according to claim 1, characterized in that: Before the satellite backpack base station sends the first information to the UE, the method further includes: The satellite backpack base station receives a request message sent by the UE, where the request message is used to request the satellite backpack base station to send first information for assisting the UE in motion control.

12. A connection management method based on a satellite backpack base station, characterized in that: The method comprises: The user equipment UE receives the first information sent by the satellite backpack base station, where the first information is used to instruct the UE to feedback the predicted motion trajectory of the UE to the satellite backpack base station before moving out of the satellite backpack base station cell, and the motion trajectory is used by the satellite backpack base station to manage the radio resource control RRC connection between the satellite backpack base station and the UE; The UE controls the communication behavior of the UE with the satellite backpack base station when the UE moves based on the motion state of the UE and the first information; the first information includes information of one or more base stations associated with the UE; wherein the one or more base stations include the satellite backpack base station; In the case where the one or more base stations include the satellite backpack base station, the first information includes at least one of the following: location information of the satellite backpack base station, a first coverage radius of the satellite backpack base station cell, and a maximum duration for which the UE is allowed to leave the satellite backpack base station cell.

13. The method according to claim 12, characterized in that The one or more base stations also include the satellite backpack base station and one or more first base stations whose distances from the satellite backpack base station meet preset conditions.

14. The method according to claim 12, characterized in that The controlling the communication behavior of the UE with the satellite backpack base station when moving based on the motion state of the UE and the first information includes: The UE determines, based on the motion state and the first information, second information, where the second information is used to indicate that a motion trajectory predicted by the UE is that the UE leaves the satellite backpack base station cell and then returns to the satellite backpack base station cell; Before leaving the satellite backpack base station cell, the UE sends the second information to the satellite backpack base station.

15. The method according to claim 14, characterized in that The second information includes: first time information when the UE leaves the satellite backpack base station cell, or the second information includes: the first time information and second time information when the UE returns to the satellite backpack base station cell.

16. The method according to claim 15, characterized in that The method further comprises: If the UE returns to the satellite backpack base station cell within a first time period after leaving the satellite backpack base station cell, the UE initiates an RRC connection recovery request to the satellite backpack base station to request the restoration of the RRC connection with the satellite backpack base station cell; wherein the first time period is related to the maximum time period allowed for the UE to leave the satellite backpack base station cell, or the first time period is related to the latest return time indicated by the second time information.

17. The method according to claim 13, characterized in that The controlling the communication behavior of the UE with the satellite backpack base station when moving based on the motion state of the UE and the first information includes: The UE determines third information based on the motion state and the first information; the third information is used to indicate that the motion trajectory predicted by the UE is that the UE enters a first target base station cell after leaving the satellite backpack base station cell, and the one or more first base stations include a first target base station; Before the UE leaves the satellite backpack base station cell, the UE sends the third information to the satellite backpack base station.

18. The method according to claim 12, characterized in that Before the UE receives the first information sent by the satellite backpack base station, the method further includes: The UE sends a request message to the satellite backpack base station, where the request message is used to request the satellite backpack base station to send first information for assisting the UE in motion control.

19. A connection management device based on a satellite backpack base station, characterized in that: include: A module for executing the method according to any one of claims 1 to 11, or a module for executing the method according to any one of claims 12 to 18.

20. An electronic device, characterized in that: include: Memory and processor; The memory is configured to store computer program instructions; The processor is configured to execute the computer program instructions so that the electronic device implements the connection management method according to any one of claims 1 to 11, or implements the connection management method according to any one of claims 12 to 18.

21. A readable storage medium, characterized in that: include: Computer program instructions; The processor of the electronic device runs the computer program instructions, so that the electronic device implements the connection management method as described in any one of claims 1 to 11, or implements the connection management method as described in any one of claims 12 to 18.

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