Satellite terminal position reporting method and system based on NAS message extension

Abstract

The invention discloses a satellite terminal position reporting method and system based on NAS message extension, and the method comprises the steps: obtaining an NAS message interacted between a satellite terminal and a satellite core network, and obtaining a position updating request message and a position updating response message; based on the NAS message, carrying out message structure expansion of a newly added field on the position updating request message and the position updating response message; and controlling the satellite terminal to actively send a satellite updating message containing the newly added field to a satellite core network, and returning a response message to the satellite terminal after the satellite core network stores the satellite updating message. According to the invention, the NAS layer information in the satellite core network system is utilized to optimize the process of position updating and reporting, and the reliability of the position updating capability of the satellite terminal under the low-orbit satellite network is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication technology, and in particular to a satellite terminal position reporting method, system, terminal and computer-readable storage medium based on NAS message extension. Background Art

[0002] In the mobile satellite communication system, the user segment needs to access the mobile satellite communication network through the ground segment for mobile communication. The mobile satellite communication system consists of three parts: the space segment, the ground segment and the user segment. The space segment is the satellite transponder, and the ground segment includes the ground master station, the network control center and the satellite control center. The ground master station is also called the gateway station or the signal gateway station, which is responsible for the transfer of the shared telephone exchange network, the cellular communication network and the mobile satellite communication network. The user segment includes mobile terminals and handheld terminals.

[0003] The low-orbit satellite core network is a key component of the satellite communication system. It is a highly complex system consisting of a series of satellites, ground stations and communication networks. The purpose of the satellite communication core network is to provide reliable communication, navigation and positioning services to ensure the smooth operation of various applications. Among them, the core network of low-Earth orbit satellites is an important component, and the ground station is the bridge between the satellite communication network and the end user.

[0004] In a 3GPP (3rd Generation Partnership Project) standard mobile communication system, the acquisition and reporting of the terminal location is usually performed through an access network base station, which relies on signaling interaction and network management at the access layer.

[0005] However, due to the high-speed movement of low-orbit satellites, frequent satellite switching is caused, and the satellite base station can no longer be relied on to determine the location of the satellite terminal. The location coordinates, speed and other information of the satellite terminal need to be directly transmitted between the satellite terminal and the satellite core network.

[0006] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0007] The main purpose of the present invention is to provide a satellite terminal position reporting method, system, terminal and computer-readable storage medium based on NAS message extension, aiming to solve the problems of weak satellite terminal position update capability and low reliability in low-orbit satellite networks in the prior art.

[0008] To achieve the above object, the present invention provides a satellite terminal position reporting method based on NAS message extension, and the satellite terminal position reporting method based on NAS message extension comprises the following steps:

[0009] Obtain NAS messages exchanged between the satellite terminal and the satellite core network, and obtain location update request messages and location update response messages;

[0010] Based on the NAS message, the location update request message and the location update response message are extended with a message structure that adds a new field;

[0011] The satellite terminal is controlled to actively send a satellite update message including the newly added field to a satellite core network, and the satellite core network stores the message and then returns a response message to the satellite terminal.

[0012] Optionally, in the satellite terminal position reporting method based on NAS message extension, the location update request message includes: satellite terminal position information, satellite orbit data and link quality information.

[0013] Optionally, in the satellite terminal location reporting method based on NAS message extension, the location update request message is sent by the satellite terminal to the satellite core network.

[0014] Optionally, in the satellite terminal location reporting method based on NAS message extension, the location update response message includes whether the location update request message sent by the satellite terminal is successfully received and status information of processing the location update request.

[0015] Optionally, in the satellite terminal location reporting method based on NAS message extension, the location update response message is replied to the satellite terminal by the satellite core network.

[0016] Optionally, in the satellite terminal position reporting method based on NAS message extension, the newly added fields include: satellite terminal position information, satellite orbit information and link quality information.

[0017] Optionally, the satellite terminal location reporting method based on NAS message extension, wherein the NAS message includes: a satellite terminal registration message, a terminal authentication message and a location update message.

[0018] In addition, to achieve the above-mentioned purpose, the present invention also provides a satellite terminal position reporting system based on NAS message extension, wherein the satellite terminal position reporting system based on NAS message extension includes:

[0019] A message acquisition module is used to acquire NAS messages exchanged between the satellite terminal and the satellite core network, and acquire location update request messages and location update response messages;

[0020] A field extension module, configured to extend the message structure of the location update request message and the location update response message by adding a new field based on the NAS message;

[0021] The message sending module is used for controlling the satellite terminal to actively send a satellite update message including the newly added field to the satellite core network, and the satellite core network stores the message and returns a response message to the satellite terminal.

[0022] In addition, to achieve the above-mentioned purpose, the present invention also provides a terminal, wherein the terminal includes: a memory, a processor, and a satellite terminal position reporting program based on NAS message extension stored in the memory and executable on the processor, wherein the satellite terminal position reporting program based on NAS message extension, when executed by the processor, implements the steps of the satellite terminal position reporting method based on NAS message extension as described above.

[0023] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a satellite terminal position reporting program based on NAS message extension, and when the satellite terminal position reporting program based on NAS message extension is executed by a processor, the steps of the satellite terminal position reporting method based on NAS message extension as described above are implemented.

[0024] In the present invention, the NAS messages exchanged between the satellite terminal and the satellite core network are obtained, and the location update request message and the location update response message are obtained; the message structure of the location update request message and the location update response message is expanded with a new field based on the NAS message; the satellite terminal is controlled to actively send a satellite update message containing the new field to the satellite core network, and the satellite core network returns a response message to the satellite terminal after storage. The present invention optimizes the process of location update and reporting by utilizing the NAS layer information in the satellite core network system, and enhances the reliability of the satellite terminal location update capability in the low-orbit satellite network. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of a preferred embodiment of a satellite terminal position reporting method based on NAS message extension of the present invention;

[0026] Figure 2 It is a structural diagram of a preferred embodiment of a satellite terminal position reporting system based on NAS message extension of the present invention;

[0027] Figure 3 It is a structural diagram of a preferred embodiment of the terminal of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The satellite terminal position reporting method based on NAS message extension described in the preferred embodiment of the present invention is as follows: Figure 1 As shown, the satellite terminal position reporting method based on NAS message extension includes the following steps:

[0030] Step S10: Acquire NAS messages exchanged between the satellite terminal and the satellite core network, and acquire location update request messages and location update response messages;

[0031] Step S20: Extending the message structures of the location update request message and the location update response message by adding new fields based on the NAS message;

[0032] Step S30: Control the satellite terminal to actively send a satellite update message including the newly added field to the satellite core network, and the satellite core network stores the message and returns a response message to the satellite terminal.

[0033] Specifically, in order to implement the satellite terminal location reporting method based on the NAS (Non-Access Stratum, non-access layer signaling) layer, it is necessary to expand the message structure of the location update request message (Location Update Request, LUR) and the location update response message (Location Update Response, LURR) based on the existing NAS message. The newly added fields include the location information of the satellite terminal, satellite orbit information, link quality and other related information.

[0034] In a standard mobile communication system, the location of a user is determined by the location of the ground base station to which it is connected, and there is no need for the terminal to report its own latitude and longitude information; in satellite communication, the satellite serving as the base station moves at high speed in space, so the location information of the satellite terminal can no longer be determined by the satellite base station to which it is connected as in a standard mobile communication system; therefore, the present invention designs a satellite terminal to actively send a satellite update message (including a newly added field) to the satellite core network, which stores the message and returns a response message to the satellite terminal.

[0035] Among them, NAS message refers to the general term for control plane messages exchanged between satellite terminals and satellite core networks. The NAS messages include: satellite terminal registration messages, terminal authentication messages and location update messages. The location update message is only one type of NAS message.

[0036] The location update request message includes: location information of the satellite terminal, satellite orbit data and link quality information, and the location update request message is sent by the satellite terminal to the satellite core network.

[0037] As shown in Table 1, it indicates the specific information included in the location update request message.

[0038] Table 1: Location Update Request Message

[0039]

[0040]

[0041] The key fields in Table 1 are explained as follows:

[0042] IMSI / IMEI: Information that uniquely identifies the satellite terminal.

[0043] Location coordinates (Latitude / Longitude): Provides the current geographic location of the satellite terminal.

[0044] Speed: Provides the current speed of the satellite terminal (used to predict the next position update timing).

[0045] Satellite orbit information: contains the satellite's orbit data, which helps the satellite core network determine the changing trend of the terminal's position.

[0046] Link quality: Link quality score, which is used to judge the signal quality and whether the location update frequency needs to be adjusted.

[0047] Position update cycle: Dynamically adjust the position update frequency by predicting the orbit and link quality of the satellite terminal.

[0048] Timestamp: Marks the exact time when the request is sent to ensure timing consistency.

[0049] Additional information: an expandable field used to add information such as terminal working status, environmental data, etc.

[0050] The location update response message includes whether the location update request message sent by the satellite terminal is successfully received and status information of processing the location update request. The location update response message is replied to the satellite terminal by the satellite core network.

[0051] As shown in Table 2, it indicates the specific information included in the location update response message.

[0052] Table 2: Location Update Response Message

[0053]

[0054] The key fields in Table 2 are explained as follows:

[0055] Location update status: Returns the processing result of the location update.

[0056] Link quality assessment: The satellite core network assesses the stability of the link based on the received link quality information.

[0057] Recommended update cycle: If the satellite core network determines that the link quality is poor, a shorter cycle may be given to ensure that the location information is updated in a timely manner.

[0058] Timestamp: marks the time when the request is received and responded to.

[0059] Additional information: Additional information that can be returned as needed to help further optimize the timing and frequency of location updates.

[0060] The information in the newly added field (newly added NAS message field) is as follows:

[0061] Geographic location field: Double-precision floating point numbers are used to represent longitude and latitude, which can provide sufficient accuracy.

[0062] Satellite orbit information: The design of satellite orbit information needs to select the appropriate format according to the specific application scenario, which can include satellite ID, orbit altitude, speed, azimuth, etc.

[0063] Link quality field: The link quality field can represent the quality of the link through an integer value (0-255), or a comprehensive evaluation value calculated based on parameters such as real-time signal strength and bit error rate.

[0064] Additional information field: This field is designed to be flexible and can be expanded with other information as needed, such as the satellite terminal's operating mode, environmental impact data, etc.

[0065] The present invention reports the position of a satellite terminal based on NAS, optimizes the process of position updating and reporting by utilizing the NAS layer information in the satellite core network system, and enhances the reliability of the satellite terminal position updating capability in a low-orbit satellite network.

[0066] Furthermore, if Figure 2 As shown, based on the above-mentioned satellite terminal position reporting method based on NAS message extension, the present invention also provides a satellite terminal position reporting system based on NAS message extension, wherein the satellite terminal position reporting system based on NAS message extension includes:

[0067] The message acquisition module 51 is used to acquire the NAS messages exchanged between the satellite terminal and the satellite core network, and acquire the location update request message and the location update response message;

[0068] A field extension module 52, configured to extend the message structure of the location update request message and the location update response message by adding a new field based on the NAS message;

[0069] In the message sending module 53, the user controls the satellite terminal to actively send a satellite update message including the newly added field to the satellite core network, and the satellite core network stores the message and returns a response message to the satellite terminal.

[0070] Furthermore, if Figure 3 As shown, based on the above-mentioned satellite terminal position reporting method and system based on NAS message extension, the present invention also provides a terminal accordingly, and the terminal includes a processor 10, a memory 20 and a display 30. Figure 3 Only some components of the terminal are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0071] In some embodiments, the memory 20 may be an internal storage unit of the terminal, such as a hard disk or memory of the terminal. In other embodiments, the memory 20 may also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the terminal. Further, the memory 20 may also include both an internal storage unit of the terminal and an external storage device. The memory 20 is used to store application software and various types of data installed in the terminal, such as the program code of the installation terminal, etc. The memory 20 may also be used to temporarily store data that has been output or is to be output. In one embodiment, a satellite terminal position reporting program 40 based on NAS message extension is stored on the memory 20, and the satellite terminal position reporting program 40 based on NAS message extension can be executed by the processor 10, thereby realizing the satellite terminal position reporting method based on NAS message extension in the present application.

[0072] In some embodiments, the processor 10 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run the program code or process data stored in the memory 20, such as executing the satellite terminal position reporting method based on NAS message extension.

[0073] In some embodiments, the display 30 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 30 is used to display information on the terminal and to display a visual user interface. The processor 10, the memory 20, and the display 30 of the terminal communicate with each other via a system bus.

[0074] In one embodiment, when the processor 10 executes the satellite terminal position reporting program 40 based on NAS message extension in the memory 20, the following steps are implemented:

[0075] Obtain NAS messages exchanged between the satellite terminal and the satellite core network, and obtain location update request messages and location update response messages;

[0076] Based on the NAS message, the location update request message and the location update response message are extended with a message structure that adds a new field;

[0077] The satellite terminal is controlled to actively send a satellite update message including the newly added field to a satellite core network, and the satellite core network stores the message and then returns a response message to the satellite terminal.

[0078] The location update request message includes: location information of the satellite terminal, satellite orbit data and link quality information.

[0079] The location update request message is sent by the satellite terminal to the satellite core network.

[0080] The location update response message includes whether the location update request message sent by the satellite terminal is successfully received and status information of processing the location update request.

[0081] The location update response message is replied by the satellite core network to the satellite terminal.

[0082] The newly added fields include: satellite terminal location information, satellite orbit information and link quality information.

[0083] The NAS messages include: satellite terminal registration message, terminal authentication message and location update message.

[0084] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a satellite terminal position reporting program based on NAS message extension, and when the satellite terminal position reporting program based on NAS message extension is executed by a processor, the steps of the satellite terminal position reporting method based on NAS message extension as described above are implemented.

[0085] In summary, the present invention provides a method, system, terminal and computer-readable storage medium for reporting the location of a satellite terminal based on NAS message extension, the method comprising: obtaining NAS messages exchanged between a satellite terminal and a satellite core network, and obtaining a location update request message and a location update response message; performing message structure extension of the location update request message and the location update response message with a newly added field based on the NAS message; controlling the satellite terminal to actively send a satellite update message containing the newly added field to the satellite core network, and the satellite core network returns a response message to the satellite terminal after storing it. The present invention optimizes the process of location update and reporting by utilizing the NAS layer information in the satellite core network system, and enhances the reliability of the satellite terminal location update capability in a low-orbit satellite network.

[0086] 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 terminal 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 terminal. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or terminal including the element.

[0087] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the program can be stored in a computer-readable storage medium that can be read by a computer, and the program can include the processes of the above-mentioned method embodiments when executed. The computer-readable storage medium can be a memory, a disk, an optical disk, etc.

[0088] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A satellite terminal position reporting method based on NAS message extension, characterized in that: The satellite terminal position reporting method based on NAS message extension includes: Obtain NAS messages exchanged between the satellite terminal and the satellite core network, and obtain location update request messages and location update response messages; Based on the NAS message, the location update request message and the location update response message are extended with a message structure that adds a new field; The satellite terminal is controlled to actively send a satellite update message including the newly added field to a satellite core network, and the satellite core network stores the message and then returns a response message to the satellite terminal.

2. The satellite terminal position reporting method based on NAS message extension according to claim 1, characterized in that: The location update request message includes: location information of the satellite terminal, satellite orbit data and link quality information.

3. The satellite terminal position reporting method based on NAS message extension according to claim 2 is characterized in that: The location update request message is sent by the satellite terminal to the satellite core network.

4. The satellite terminal position reporting method based on NAS message extension according to claim 3 is characterized in that: The location update response message includes whether the location update request message sent by the satellite terminal is successfully received and status information of processing the location update request.

5. The satellite terminal position reporting method based on NAS message extension according to claim 4 is characterized in that: The location update response message is replied by the satellite core network to the satellite terminal.

6. The satellite terminal position reporting method based on NAS message extension according to claim 1, characterized in that: The newly added fields include: satellite terminal location information, satellite orbit information and link quality information.

7. The satellite terminal position reporting method based on NAS message extension according to claim 1, characterized in that: The NAS messages include: satellite terminal registration message, terminal authentication message and location update message.

8. A satellite terminal position reporting system based on NAS message extension, characterized in that: The satellite terminal position reporting system based on NAS message extension includes: A message acquisition module is used to acquire NAS messages exchanged between the satellite terminal and the satellite core network, and acquire location update request messages and location update response messages; A field extension module, configured to extend the message structure of the location update request message and the location update response message by adding a new field based on the NAS message; The message sending module is used for controlling the satellite terminal to actively send a satellite update message including the newly added field to the satellite core network, and the satellite core network stores the message and returns a response message to the satellite terminal.

9. A terminal, characterized in that: The terminal includes: a memory, a processor, and a satellite terminal position reporting program based on NAS message extension stored in the memory and executable on the processor. When the satellite terminal position reporting program based on NAS message extension is executed by the processor, the steps of the satellite terminal position reporting method based on NAS message extension as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a satellite terminal position reporting program based on NAS message extension. When the satellite terminal position reporting program based on NAS message extension is executed by a processor, the steps of the satellite terminal position reporting method based on NAS message extension as described in any one of claims 1-7 are implemented.

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