WO2022001173A1

WO2022001173A1 - Satellite-ground cooperative paging method and device for satellite communication system

Info

Publication number: WO2022001173A1
Application number: PCT/CN2021/080266
Authority: WO
Inventors: 史焱; 李江华; 齐东元
Original assignee: 凯睿星通信息科技(南京)股份有限公司
Priority date: 2020-07-02
Filing date: 2021-03-11
Publication date: 2022-01-06
Also published as: CN111510203A; CN111510203B

Abstract

The present invention relates to the technical field of satellite communications. Disclosed are a satellite-ground cooperative paging method and device for a satellite communication system, aiming at solving the problems in the prior art that the greater the pressure on a satellite-ground signaling channel, the more the security needs to be improved, and that the on-satellite storage and processing capacity is limited. The key points of the technical solution are: first, classifying terminals and, according to the different classes of terminals, performing initial location management after network access registration; then, a ground area control center and an on-satellite processing unit cooperatively initiating paging to a called terminal, and according to different terminals, the on-satellite processing unit or the ground area control center searching for the location of the called terminal and performing paging; and finally, performing location update management on the terminal to ensure that the ground area control center or the on-satellite processing unit records the latest terminal location information in a timely manner, thereby realizing efficient paging for terminals. According to the present invention, the effects of improving the system reliability, and improving the paging efficiency and the concealment and security of a high-speed terminal and a special terminal are achieved.

Description

A satellite-ground coordinated paging method and device for a satellite communication system

technical field

The present invention relates to the technical field of satellite communication, in particular to a satellite-ground cooperative paging method and device of a satellite communication system.

Background technique

With the development of communication satellite technology, the capacity of satellite communication continues to increase, especially the development of high-throughput communication satellites, resulting in a huge number of terminals served by a single satellite communication system and a single satellite. Due to the mobility of satellite communication terminals, when there is a communication demand, the satellite communication system must initiate paging to the terminal to establish a communication connection. Therefore, in order to ensure the success rate and accuracy of paging, the satellite communication system needs to perform effective Location management and paging.

Generally, the satellite communication system centrally manages the location information of all terminals in the ground control center. The terminal reports its location information to the ground control center through the satellite, and the ground control center initiates paging according to the terminal location information.

The above method requires frequent interaction between each terminal and the ground control center, and the huge number of mobile terminals will put greater pressure on the satellite-to-earth signaling channel. big. In addition, due to the fixed location of the ground control center, there is a greater security risk for special terminals to report real-time location information through the satellite-to-ground signaling channel. For satellite communication systems with on-board processing capabilities, location management and paging functions can be implemented on-board, but for systems with a large number of terminals, the limited storage and processing capabilities on-board are difficult to meet the needs.

SUMMARY OF THE INVENTION

One of the above-mentioned purposes of the present invention is achieved through the following technical solutions:

A satellite-ground coordinated paging method for a satellite communication system, performing initial position management after network registration for conventional terminals, high-speed terminals and special terminals, the conventional terminals are registered and location management at a ground area control center, the high-speed terminals and After the special terminal is registered in the ground area control center, it is transferred to the onboard processing unit for location management;

The ground area control center and the onboard processing unit cooperate to initiate paging to the called terminal, the conventional terminal is coordinated by the ground area control center to find the location of the called terminal and perform paging, and the high-speed terminal and the special terminal are operated by the satellite. The processing unit searches for the location of the called terminal and performs paging;

The location update management of the terminal is performed, and the ground area control center or the onboard processing unit records the latest terminal location information in time.

The present invention is further set up as follows: the initial location management steps after the conventional terminal, high-speed terminal and special terminal are registered in the network include:

The terminal performs network access registration at its home ground area control center to obtain a corresponding terminal ID;

The ground area control center distinguishes the terminal type, the conventional terminal is stored in the conventional terminal management unit of the local location register management unit, the high-speed terminal or the special terminal is stored in the high-speed and special terminal management unit of the local location register management unit, and Assign a VID to the high-speed terminal or special terminal;

The local location register management unit sends the terminal ID of the high-speed terminal or the special terminal and the assigned VID information to the on-board virtual location management unit, and the on-board virtual location management unit receives and stores;

After the terminal starts up and works, reports the terminal ID and location information to the current access area control center, and the current access area control center judges whether it belongs to the current area control center according to the terminal ID.

The present invention is further set as: if the terminal ID belongs to the current access area control center, the local location register management unit judges the terminal type, and if the terminal is a conventional terminal, searches for the terminal ID in the conventional terminal management unit and records its position information;

If the terminal is a high-speed terminal or a special terminal, search the terminal ID and VID information in the high-speed and special terminal management unit, and send the VID and location information to the satellite signaling processing unit through the ground signaling processing unit, and send the information to the satellite signaling processing unit at the same time. The terminal feeds back the confirmation signaling including the VID information; the satellite signaling processing unit receives the VID and the location information and sends them to the on-board virtual location management unit, and the on-board virtual location management unit finds the terminal ID through the VID and records the location information.

The present invention is further set to: if the terminal ID does not belong to the current access area control center, then record the terminal ID and the location information in the access location register management unit, and record the terminal ID, location information and the current access area control center The number is forwarded to the regional control center to which it belongs;

After the regional control center to which the terminal ID belongs receives the information, the local location register management unit judges the terminal type, and if the terminal type is a conventional terminal, searches for the terminal ID in the conventional terminal management unit and records its location information, and records the terminal ID. The current access control center number corresponding to the terminal ID;

If the terminal is a high-speed terminal or a special terminal, search the terminal ID and VID information in the high-speed and special terminal management unit, and send the VID and location information to the satellite signaling processing unit through the ground signaling processing unit, and the The satellite signaling processing unit receives the VID and the location information and sends them to the on-board virtual location management unit, where the on-board virtual location management unit finds the terminal ID through the VID and records the location information.

The present invention is further set up as follows: the step of coordinating the ground area control center and the on-board processing unit to initiate paging to the called terminal includes:

When the calling terminal has a call request to the called terminal, the calling terminal sends a call request signaling including the terminal ID of the called terminal, and the satellite signaling processing unit receives the call request signaling and determines the terminal ID of the called terminal Whether it is stored in the on-board virtual location management unit;

If the terminal ID of the called terminal is stored in the on-board virtual location management unit, query the location of the terminal ID of the called terminal and the corresponding beam, and initiate paging signaling under the beam;

If the terminal ID of the called terminal is not stored in the on-board virtual location management unit, the call request signaling is forwarded to the ground area control center where the beam where the calling terminal belongs. After receiving the call request, the ground area control center will paging by the ground The management unit inquires the terminal ID of the called terminal in the home location register management unit and the visitor location register management unit.

The invention is further set as: if the terminal ID of the called terminal inquires the record in the local access location register management unit, then the on-satellite paging management unit initiates paging signaling through the satellite in the beam where the terminal ID of the called terminal is located;

If the terminal ID of the called terminal is queried and recorded in the local location register management unit, and the current position is within the beam coverage area corresponding to the local control center, the on-board paging management unit will directly pass the satellite to the called terminal's The beam where the terminal ID is located initiates paging signaling;

If the terminal ID of the called terminal is recorded in the local location register management unit, but the current location of the record is not within the responsible area of the local control center, the ground paging management unit obtains the access area control center where the called terminal is currently located and forward the call request signaling to the area control center; the ground paging management unit of the access area control center queries and obtains the beam corresponding to the current location of the called terminal from the local access location register management unit, and passes The satellite initiates paging signaling in the beam where the terminal ID of the called terminal is located;

After receiving the paging signaling, the called terminal feeds back the paging response signaling, and the paging ends.

The present invention is further set as: the step of performing location update management on the terminal includes:

If the terminal is a conventional terminal, when the terminal judges that the current location update condition is met, it sends a location update signaling including at least the terminal ID and the current location to the ground area control center corresponding to the current beam; the ground area control center receives the location update After signaling, perform the initial location management steps after the network access registration is performed to complete the location update of the conventional terminal;

If the terminal is a high-speed terminal or a special terminal that has been assigned a VID, when the terminal determines that the current location update condition is met, it sends a location update signaling including at least the VID and the current location to the satellite signaling processing unit, and the satellite signaling The processing unit judges that the location update signaling needs to be processed by the on-board virtual location management unit according to the VID, and the on-board virtual location management unit searches and updates the corresponding terminal location record according to the VID to complete the location update of the high-speed terminal or special terminal;

The location update of the conventional terminal and the location update of the high-speed terminal or the special terminal are performed cyclically to ensure that the latest terminal location information is recorded in the location management unit.

The present invention is further arranged as follows: the ground area control center includes a ground signaling processing unit, a ground paging management unit, a visiting location register management unit, and a local location register management unit, and the ground signaling processing unit realizes the processing of satellite signaling. Signal transmission between the unit and the ground signaling processing units of other regional control centers, the ground paging management unit realizes the paging processing of the terminal by the regional control center, and the access location register management unit is responsible for managing the local area. Control the information of the terminals within the service area of the center but not belonging to the center, and the local location register management unit is responsible for managing the information of the terminals belonging to the center.

The present invention is further provided that: the local location register management unit includes a conventional terminal management unit and a high-speed and special terminal management unit, which respectively manage the location information of the conventional terminal and the location information of the high-speed terminal and the special terminal.

The present invention is further arranged as follows: the on-board processing unit includes a satellite signaling processing unit, an on-board paging management unit, and an on-board virtual location management unit, and the satellite signaling processing unit realizes the satellite signaling processing unit and the ground area control. Signaling transmission between signaling processing units in the center, the on-board paging management unit implements paging processing for high-speed terminals and special terminals managed in the on-board virtual location management unit, the on-board virtual location management unit Responsible for managing information on high-speed terminals and special terminals.

The second purpose of the present invention is achieved through the following technical solutions:

A satellite-ground coordinated paging device of a satellite communication system includes a ground area control center, an on-board processing unit and several terminals, the ground area control center, the on-board processing unit and the terminals execute the above method.

The third purpose of the present invention is achieved through the following technical solutions:

A readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, is used to realize the object of the present invention, the method of various possible designs.

To sum up, the beneficial technical effects of the present invention are:

1. Compared with the single ground control center paging management technology in the existing method, the present invention improves the system reliability and reduces the communication and processing load of the single control center;

2. For the paging management technology in the existing method that is only implemented in the ground control center, the present invention improves the paging efficiency and concealment security of the high-speed terminal and the special terminal, and avoids the terminal position of the ground control center with a fixed position. Risk of information leakage caused by frequent updates of information;

3. Compared with the paging management technology of realizing all terminals on the satellite in the existing method, the present invention effectively reduces the processing load and resource requirements on the satellite, and increases the terminal capacity of the entire satellite communication system.

Description of drawings

Fig. 1 is the overall flow chart of Embodiment 1 of the present invention;

2 is a system functional block diagram of Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a paging process according to Embodiment 1 of the present invention.

detailed description

Example 1

The invention discloses a satellite-ground coordinated paging method for a satellite communication system, which includes several ground area control centers, on-board processing units, satellites and a large number of terminal devices. The functions of each part are composed as follows:

Ground area control center: including ground signaling processing unit, ground paging management unit, HLR management unit (Home Location Register, local location register), VLR management unit (Visitor Location Register, access location register). Since the satellite covers a wide geographical area, according to the operational convenience of the satellite system, multiple ground area control centers can be configured, and each ground area control center manages functions such as terminal registration, paging, and communication within the coverage area of a certain number of satellite beams.

On-board processing unit: including satellite signaling processing unit, on-board paging management unit, and SVL (Satellite virtual location, on-board virtual location) management unit. Through the coordination with the ground area control center, the location management and paging functions of high-speed terminals and special terminals are realized.

Terminal equipment: The equipment that uses the satellite communication system to realize mobile communication, based on different attribute requirements, is divided into conventional terminals, high-speed terminals, and special terminals. Among them, high-speed terminals have the characteristics of high mobility, such as aircraft and low-orbit aircraft, etc., special terminals have high concealment requirements, and other terminals are conventional terminals without special requirements, but the number of terminals is very large.

It is assumed that the satellite communication system consists of several beams covering the ground, and N ground regional control centers are distributed in different geographical areas. Each regional control center is responsible for terminal management and communication in several beams covering the area, and is connected through a ground interconnection network; The regional control center communicates with the terminal in the beam it is responsible for through the on-board transparent forwarding channel. At the same time, for a specific signaling channel, the satellite has on-board processing capabilities. When the terminal or the ground regional control center needs to send signaling to the on-board processing functional unit Use that specific signaling channel. It is assumed that terminal A (special terminal type) belongs to ground area control center 1 and terminal B (regular terminal type) belongs to ground area control center 2 .

Referring to FIG. 1 and FIG. 2 , this specific implementation includes three stages: an initial location management process after a terminal is registered in a network, a terminal paging process, and a terminal location update process.

Stage 1: The initial location management process after the terminal is registered in the network, including the following steps:

S1: Terminal A performs network access registration at its home ground area control center 1, and obtains the corresponding terminal ID as "9001-1001"; terminal B performs network access registration at its home ground area control center 2, and obtains the corresponding terminal ID as "9002" -1002"; the specific implementation steps are as follows:

The terminal registration and allocation ID consists of at least the following two parts of information: the attribution number and the equipment number, where the attribution number represents the ground area control center to which the terminal belongs, and each ground area control center corresponds to a unique number; the equipment number uniquely distinguishes the control center belonging to the area. All terminals in the center. The number of the ground area control center 1 is "9001", and the number of the ground area control center 2 is "9002", then the terminal A is registered in the ground area control center 1, the assigned terminal ID is "9001-1001", and the terminal is registered in the ground area Control Center 2, assign the terminal ID as "9002-1002";

S2: The ground area control center distinguishes the terminal type, performs storage management in the HLR management unit according to the terminal type, and at the same time, cooperates with the SVL management unit. The specific steps are as follows:

S2-1: The ground area center 2 judges that the terminal B is a conventional terminal according to specific judgment conditions, such as a service agreement with the user, etc., and then uses the information of the terminal B, including but not limited to the terminal ID "9002-1002", type "normal terminal" ", stored in the conventional terminal management unit of the HLR management unit;

S2-2: The ground area center 1 judges that the terminal A is a special terminal according to specific judgment conditions, such as the service agreement with the user, etc., and then uses the information of the terminal A, including but not limited to the terminal ID "9001-1001", type "special ”, which is stored in the high-speed and special terminal management unit of the HLR management unit, and assigns a virtual number (VID) to the terminal, VID=0001;

S2-3: The HLR management unit of the ground area center 1 sends the ID "9001-1001" of terminal A and the assigned VID "0001" information through the signaling processing unit on a specific signaling channel, and sends it to the onboard processing channel after receiving it. Arriving at the satellite SVL management unit, the SVL management unit receives and stores it.

S3: The terminal starts up and works, and reports the terminal ID and location information to the ground area control center belonging to the geographical area where it is located, and the area control center is called the current access area control center of the terminal ID. The current access regional control center judges whether it belongs to the regional control center according to the terminal ID. If the terminal ID belongs to the regional control center, the HLR management unit further determines the terminal type; if the terminal ID does not belong to the regional control center, the terminal ID and The location information is forwarded to the regional control center to which it belongs for further processing.

Specific examples are as follows:

Referring to FIG. 3 , it is assumed that terminal A and terminal B are respectively located in the coverage areas of beams numbered 1-1 and 1-2 that are responsible for the ground area control center 1, terminal A and terminal B are powered on from the off state, and terminal A passes through The transparent forwarding channel reports its terminal ID "9001-1001" and location information (such as beam number 1-1). The ground area control center 1 determines the home center according to the terminal ID of terminal A, and the HLR management unit further determines the terminal type. Terminal B reports its terminal ID "9002-1002" and location information (such as beam number 1-2) through the transparent forwarding channel. The ground area control center 1 judges that it does not belong to the center according to the terminal ID of terminal B, and then converts the ID of terminal B to the center. And the location information is forwarded to the regional control center (number 9002) to which it belongs for further processing.

Further, the specific steps for the current access area control center to process the terminal location information belonging to this control center are as follows:

S3-1: The HLR management unit judges the type of terminal A, and if the terminal type is a conventional terminal, searches for the terminal ID in the conventional terminal management unit and records its location information;

S3-2: If the type of terminal A is a high-speed or special terminal, search for the terminal ID=9001-1001 and VID=0001 in the high-speed and special terminal management unit, and send the VID and location information to the satellite through the signaling processing unit The signaling processing unit feeds back the confirmation signaling including the VID information to the terminal A at the same time;

S3-3: The satellite signaling processing unit receives and sends it to the SVL management unit, and the SVL management unit finds the terminal ID=9001-1001 through VID=0001 and records the position information (beam number 1-1);

Further, the specific steps for the current access area control center to process the terminal location information that does not belong to the control center are as follows:

S3-1: It is judged that the ID of terminal B=9002-1002, and it does not belong to the current access area control center, then the terminal ID=9002-1002 and the location information (beam 1-2) are recorded in the VLR management unit, and the terminal ID is recorded at the same time. = 9002-1002 and the location information (beam 1-2) and the current access area control center number 9001 and other information, forwarded to the area control center 2 (number 9002) to which it belongs through the ground interconnection network;

S3-2: After the regional control center 2 to which the terminal B belongs receives the information, the HLR management unit determines that the terminal type is a conventional terminal, then searches for the terminal ID in the conventional terminal management unit and records its location information (beam 1-2), and at the same time, Record the current access control center corresponding to terminal B as number 9001;

S4: So far, after the terminal A and the terminal B are powered on, the location management function necessary for the paging function has been completed. When there is a call request for a certain terminal, the satellite communication system will initiate a paging process for the terminal.

Stage 2: Initiating a paging process flow to the called terminal.

S1: Suppose that terminal C initiates a call request to terminal A, and terminal D initiates a call to terminal B. The calling terminal C sends the call request signaling containing the terminal ID of the called terminal A=9001-1001, the calling terminal D sends the call request signaling containing the terminal ID=9002-1002 of the called terminal B, and the satellite signaling process Unit receives and processes.

S2: The satellite signaling processing unit finds the position of the ID of the called terminal A corresponding to beam 1-1 in the SVL management unit, and initiates paging signaling to the called terminal A under the beam, and the called terminal A receives After the paging signaling, the paging response signaling is fed back, and the paging process for terminal A ends;

S3: The satellite signaling processing unit does not query the terminal ID of the called terminal B in the SVL management unit, and then forwards the call request signaling to the ground area control center 2 to which the beam where the calling terminal D belongs. After the ground area control center 2 receives the call request, the ground paging management unit queries the called terminal B in the local HLR management unit and the VLR management unit, and further processes according to the query result. The process is as follows:

S3-1: If the called terminal ID is queried and recorded in the local VLR management unit, indicating that the current position of the terminal is within the beam coverage area corresponding to the local control center, the on-satellite paging management unit directly passes the satellite to the called terminal The beam where the ID is located initiates paging signaling, if the called terminal B cannot find the record in the local VLR management unit, go to step S3-2;

S3-2: If the called terminal ID is queried and recorded in the local HLR management unit, and the current position is within the coverage area of the beam corresponding to the local control center, the paging management unit directly initiates the call through the satellite in the beam where the called terminal ID is located. Paging signaling, if the called terminal B queries the record in the local HLR management unit, but the current position of the record is not in the beam coverage area corresponding to the local control center, go to step S3-3;

S3-3: The called terminal B queries the record in the local HLR management unit, but the current location of the record is not in the area in charge of the local control center. The paging management unit obtains the access area control center number where the called terminal B is currently located as 9001 , and forward the call request signaling to the regional control center (number 9001) through the terrestrial interconnection network; the paging management unit of the access regional control center 9001 queries and obtains the current information of the called terminal B from the local VLR management unit The corresponding beam of the location is 1-2, and the paging signaling is initiated in the beam 1-2 where the called terminal B is located through the satellite;

S4: After receiving the paging signaling, the called terminal B feeds back the paging response signaling, and the paging process for the terminal B ends.

Stage 3: Location update processing flow during terminal movement:

Due to the mobility of the terminal, the location is constantly changing, and the new location needs to be sent to the location management unit. Suppose that terminal A moves to the coverage area of beam 3-1, which is in charge of area control center 3, and terminal B moves to the beam that area control center 3 is responsible for. Within the coverage of 3-2, the specific processing flow is as follows:

S1: Terminal B is a conventional terminal. At this time, terminal B judges that the current location update condition is met, and sends the location update signaling including at least the terminal ID and the current location (beam 3-2) through the on-board transparent forwarding channel to the corresponding beam of the current location. The ground area control center 3; after receiving the location update signaling, the ground area control center 3 executes step S3 of phase one, and the embodiment of the same phase one of S3 will not be repeated here.

S2: Terminal A is a special terminal that has been assigned VID=001. Terminal A judges that the current location update condition is met, and sends a location update signaling including at least terminal VID=001 and current location (beam 3-2) through the onboard processing channel To the satellite signaling processing unit, the satellite signaling processing unit judges that the position update signaling needs to be processed by the SVL management unit according to the VID; the SVL management unit searches for the corresponding terminal ID=9001-1001 according to VID=001, and updates the location record as beam 3 -1;

S3: The location update processing flow always runs S1-S2 in the third stage in a loop, ensuring that the latest location information of terminal A and terminal B is recorded in the location management unit.

Example 2

The invention discloses a satellite-ground coordinated paging device for a satellite communication system, comprising a ground area control center, an on-board processing unit and several terminals, and the ground area control center, the on-board processing unit and the terminal execute the method disclosed in Embodiment 1 .

Example 3

The present invention discloses a readable storage medium, where a computer program is stored in the readable storage medium, and the computer program is used to implement the method in Embodiment 1 when the computer program is executed by a processor.

The readable storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media can be any available media that can be accessed by a general purpose or special purpose computer. For example, a readable storage medium is coupled to the processor such that the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium may be located in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). Alternatively, the ASIC may be located in the user equipment. Of course, the processor and the readable storage medium may also exist in the communication device as discrete components. The readable storage medium may be read only memory (ROM), random access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like.

The present invention also provides a program product including execution instructions stored in a readable storage medium. At least one processor of the device can read the execution instruction from the readable storage medium, and the execution of the execution instruction by the at least one processor causes the device to implement the methods provided by the various embodiments described above.

In the above embodiments of the terminal or server, it should be understood that the processor may be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processors, digital signal processors (English: Digital Signal Processor) , referred to as: DSP), application specific integrated circuit (English: Application Specific Integrated Circuit, referred to as: ASIC) and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the present invention can be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The embodiments of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered in within the protection scope of the present invention.

Claims

A satellite-ground coordinated paging method for a satellite communication system, characterized in that:

The initial location management after network registration is performed for conventional terminals, high-speed terminals and special terminals. The conventional terminals are registered and managed at the ground area control center, and the high-speed terminals and special terminals are registered in the ground area control center. The upper processing unit performs location management;

The ground area control center and the onboard processing unit cooperate to initiate paging to the called terminal, the conventional terminal is coordinated by the ground area control center to find the location of the called terminal and perform paging, and the high-speed terminal and the special terminal are operated by the satellite. The processing unit searches for the location of the called terminal and performs paging;

The location update management of the terminal is performed, and the ground area control center or the onboard processing unit records the latest terminal location information in time.
The satellite-ground coordinated paging method for a satellite communication system according to claim 1, wherein the initial location management step after the network access registration of the conventional terminal, the high-speed terminal and the special terminal comprises:

The terminal performs network access registration at its home ground area control center to obtain a corresponding terminal ID;

The ground area control center distinguishes the terminal type, the conventional terminal is stored in the conventional terminal management unit of the local location register management unit, the high-speed terminal or the special terminal is stored in the high-speed and special terminal management unit of the local location register management unit, and Assign a VID to the high-speed terminal or special terminal;

The local location register management unit sends the terminal ID of the high-speed terminal or the special terminal and the assigned VID information to the on-board virtual location management unit, and the on-board virtual location management unit receives and stores;

After the terminal starts up and works, reports the terminal ID and location information to the current access area control center, and the current access area control center judges whether it belongs to the current area control center according to the terminal ID.
A satellite-ground coordinated paging method for a satellite communication system according to claim 2, wherein: if the terminal ID belongs to the current access area control center, the local location register management unit determines the terminal type, and if the terminal is a conventional terminal, look up the terminal ID in the conventional terminal management unit and record its location information;

If the terminal is a high-speed terminal or a special terminal, search the terminal ID and VID information in the high-speed and special terminal management unit, and send the VID and location information to the satellite signaling processing unit through the ground signaling processing unit, and send the information to the satellite signaling processing unit at the same time. The terminal feeds back the confirmation signaling including the VID information; the satellite signaling processing unit receives the VID and the location information and sends them to the on-board virtual location management unit, and the on-board virtual location management unit finds the terminal ID through the VID and records the location information.
The satellite-ground cooperative paging method of a satellite communication system according to claim 2, wherein if the terminal ID does not belong to the current access area control center, the terminal ID and location information are recorded in the access location register management unit , and forward the terminal ID, location information and current access area control center number to the area control center to which it belongs;

After the regional control center to which the terminal ID belongs receives the information, the local location register management unit judges the terminal type, and if the terminal type is a conventional terminal, searches for the terminal ID in the conventional terminal management unit and records its location information, and records the terminal ID. The current access control center number corresponding to the terminal ID;

If the terminal is a high-speed terminal or a special terminal, search the terminal ID and VID information in the high-speed and special terminal management unit, and send the VID and location information to the satellite signaling processing unit through the ground signaling processing unit, and the The satellite signaling processing unit receives the VID and the location information and sends them to the on-board virtual location management unit, where the on-board virtual location management unit finds the terminal ID through the VID and records the location information.
The satellite-ground coordinated paging method of a satellite communication system according to claim 1, wherein the step of coordinating the ground area control center and the on-board processing unit to initiate paging to the called terminal comprises:

When the calling terminal has a call request to the called terminal, the calling terminal sends a call request signaling including the terminal ID of the called terminal, and the satellite signaling processing unit receives the call request signaling and determines the terminal ID of the called terminal Whether it is stored in the on-board virtual location management unit;

If the terminal ID of the called terminal is stored in the on-board virtual location management unit, query the location of the terminal ID of the called terminal and the corresponding beam, and initiate paging signaling under the beam;

If the terminal ID of the called terminal is not stored in the on-board virtual location management unit, the call request signaling is forwarded to the ground area control center where the beam where the calling terminal belongs. After receiving the call request, the ground area control center will paging by the ground The management unit inquires the terminal ID of the called terminal in the home location register management unit and the visitor location register management unit.
The satellite-ground coordinated paging method of a satellite communication system according to claim 5, wherein if the terminal ID of the called terminal is queried for a record in the local access location register management unit, the on-board paging management The unit initiates paging signaling through the satellite in the beam where the terminal ID of the called terminal is located;

If the terminal ID of the called terminal is queried and recorded in the local location register management unit, and the current position is within the beam coverage area corresponding to the local control center, the on-board paging management unit will directly pass the satellite to the called terminal's The beam where the terminal ID is located initiates paging signaling;

If the terminal ID of the called terminal is recorded in the local location register management unit, but the current location of the record is not within the responsible area of the local control center, the ground paging management unit obtains the access area control center where the called terminal is currently located and forward the call request signaling to the area control center; the ground paging management unit of the access area control center queries and obtains the beam corresponding to the current location of the called terminal from the local access location register management unit, and passes The satellite initiates paging signaling in the beam where the terminal ID of the called terminal is located;

After receiving the paging signaling, the called terminal feeds back the paging response signaling, and the paging ends.
A satellite-ground coordinated paging method for a satellite communication system according to claim 1, wherein the step of performing location update management on the terminal comprises:

If the terminal is a conventional terminal, when the terminal judges that the current location update condition is met, it sends a location update signaling including at least the terminal ID and the current location to the ground area control center corresponding to the current beam; the ground area control center receives the location update After signaling, perform the initial location management steps after the network access registration is performed to complete the location update of the conventional terminal;

If the terminal is a high-speed terminal or a special terminal that has been assigned a VID, when the terminal determines that the current location update condition is met, it sends a location update signaling including at least the VID and the current location to the satellite signaling processing unit, and the satellite signaling The processing unit judges that the location update signaling needs to be processed by the onboard virtual location management unit according to the VID, and the onboard virtual location management unit searches and updates the corresponding terminal location record according to the VID to complete the location update of the high-speed terminal or special terminal; cyclically execute the conventional terminal The location update of the high-speed terminal and the location update of the special terminal ensure that the latest terminal location information is recorded in the location management unit.
A satellite-ground coordinated paging method for a satellite communication system according to any one of claims 1 to 7, wherein the ground area control center includes a ground signaling processing unit, a ground paging management unit, an access Location register management unit, local location register management unit, the ground signaling processing unit realizes signaling transmission between the satellite signaling processing unit and the ground signaling processing units of other regional control centers, the ground paging management unit Realize the paging processing of the terminal by the local control center, the visiting location register management unit is responsible for managing the information of the terminal located in the service area of the local control center and not belonging to the center, and the local location register management unit is responsible for managing the belonging information on the terminal at the center.
The satellite-ground coordinated paging method of a satellite communication system according to claim 8, wherein the local location register management unit includes a conventional terminal management unit and a high-speed and special terminal management unit, which respectively manage the location information of the conventional terminals and location information of high-speed terminals and special terminals.
A satellite-ground coordinated paging method for a satellite communication system according to any one of claims 1-7, wherein the on-board processing unit comprises a satellite signaling processing unit, an on-board paging management unit, On-board virtual location management unit, the satellite signaling processing unit realizes signaling transmission between the satellite signaling processing unit and the signaling processing unit of the ground area control center, and the on-board paging management unit realizes on-board virtual Paging processing of high-speed terminals and special terminals managed in the location management unit, the on-board virtual location management unit is responsible for managing the information of high-speed terminals and special terminals.
A satellite-ground coordinated paging device for a satellite communication system, characterized in that it comprises a ground area control center, an on-board processing unit and several terminals, and the ground area control center, the on-board processing unit and the terminal implement claims 1-7 The method of any of the above.
A readable storage medium, characterized in that, a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, is used to implement the method of any one of claims 1 to 7.