Inter-satellite instruction forwarding system and method based on laser communication

Abstract

The invention discloses an inter-satellite instruction forwarding system and method based on laser communication, and relates to the field of satellite communication. Comprising a ground measurement and control station, a satellite A, a satellite B, a satellite-ground channel and a laser link, wherein the satellite A is used for describing satellites in a visible arc range of the ground measurement and control station; the satellite B is used for describing satellites in a non-measurement and control arc section of the ground measurement and control station; the satellite-ground channel is a space information channel between the ground measurement and control station and a satellite A; the laser link is a space forwarding channel between a satellite A and a satellite B; the ground measurement and control station sends a control instruction for the satellite B to the satellite A through a satellite-ground channel, and the satellite A forwards the control instruction for the satellite B to the satellite B through a laser link. The method and the device are used for solving the problem that the measurement and control requirements of a large number of low-orbit satellites cannot be met due to the limitation of the number and the positions of ground measurement and control stations in the networking working condition of a plurality of low-orbit satellites, especially in the construction stage of large-scale low-orbit constellations in the future.

Description

Technical Field

[0001] The present invention relates to the field of satellite communications, and in particular to an inter-satellite command forwarding system and method based on laser communications. Background Art

[0002] Currently, many countries in the world are promoting the construction of space-based Internet systems. Space-based Internet, which consists of hundreds to tens of thousands of low-orbit satellite constellations, provides broadband communication services to any area on the ground. It is an important part of future 6G communications and has important political, military and economic value. In the process of satellite constellation formation, use and maintenance, it is necessary to monitor and control the status of satellites through ground measurement and control stations.

[0003] Due to the limited number of tracking and control stations and the locations of their construction, when there are a large number of low-orbit satellites and orbits, the resources of ground tracking and control stations are difficult to meet the tracking and control needs of a large number of low-orbit satellites. At the same time, due to the influence of the earth's curvature, the visibility time of low-orbit satellites to ground stations is limited, and each orbit is only visible for a few minutes, which affects the timeliness and effectiveness of tracking and control. Current solutions include: First, sending timing control instructions when the satellite tracking and control station passes through the tracking and control area. This method has poor real-time performance, and satellites in some orbits are not visible to the tracking and control station; second, data is forwarded through high-orbit satellites, but this method requires the use of communication resources of high-orbit satellites. It can be seen that the existing methods have great limitations. Summary of the invention

[0004] The purpose of the present invention is to provide an inter-satellite command forwarding system and method based on laser communication, so as to solve the problem of multiple low-orbit satellite networking working conditions, especially in the stage of future large-scale low-orbit constellation construction, due to the limitation of the number and location of ground measurement and control stations, it is impossible to meet the measurement and control needs of a large number of low-orbit satellites.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] On the one hand, this specification provides an inter-satellite command forwarding system based on laser communication, including a ground tracking and control station, a satellite A, a satellite B, a satellite-to-ground channel and a laser link, wherein:

[0007] Satellite A is used to describe the satellite within the visible arc range of the ground tracking and control station;

[0008] The satellite B is used to describe the satellite in the non-tracking arc of the ground tracking station;

[0009] The satellite-to-ground channel is a space information channel between the ground tracking and control station and satellite A; the laser link is a space forwarding channel between satellite A and satellite B;

[0010] The ground measurement and control station sends the control instructions for satellite B to satellite A through the satellite-to-ground channel, and satellite A forwards the control instructions for satellite B to satellite B through the laser link.

[0011] On the other hand, this specification also provides an inter-satellite command forwarding method based on laser communication, comprising:

[0012] The ground tracking and control station sends the control instructions for satellite B to satellite A through the satellite-to-ground channel;

[0013] Satellite A forwards the control instruction to satellite B to satellite B via a laser link;

[0014] Among them, the satellite A is used to describe the satellite within the visible arc range of the ground tracking and control station; the satellite B is used to describe the satellite in the non-tracking and control arc range of the ground tracking and control station; the satellite-to-ground channel is the space information channel between the ground tracking and control station and satellite A; the laser link is the space forwarding channel between satellite A and satellite B.

[0015] Based on the above technical solution, this specification can achieve the following technical effects:

[0016] The inter-satellite command forwarding system based on laser communication proposed by the present invention uses a satellite-borne laser communication terminal to realize command forwarding. It is implemented by software on existing equipment without the need for other equipment or hardware resources. The technical effects of the present invention are:

[0017] (1) Through inter-satellite command forwarding, the ground tracking and control station can remotely monitor and control satellites in non-tracking areas in real time, including: (a) satellite platform control, such as attitude adjustment and orbit change; (b) satellite payload control, such as remote sensing camera data collection and communication equipment transmission and reception control;

[0018] (2) Furthermore, satellites in non-TT&C areas can be used to achieve communication interconnection and command forwarding with other ground, air, and ocean vehicles, thus realizing a real-time control closed loop of the sea, air, and space Internet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the composition of an intersatellite command forwarding system based on laser communication provided in Examples 1 and 2 of this specification;

[0020] Figure 2 This is a functional schematic diagram of an intersatellite command forwarding system based on laser communication provided in Example 1 of this specification;

[0021] Figure 3 This is a functional diagram of the channel interface provided in Example 1 of this specification. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0023] It should be noted that, in order to clearly explain the content of the present invention, the present invention specifically cites multiple embodiments to further illustrate different implementations of the present invention, wherein the multiple embodiments are enumerated rather than exhaustive. In addition, for the sake of brevity of explanation, the contents mentioned in the previous embodiments are often omitted in the subsequent embodiments. Therefore, the contents not mentioned in the subsequent embodiments can refer to the previous embodiments accordingly.

[0024] Example 1

[0025] Please refer to Figure 1 , Figure 2 , Figure 1 FIG. 1 is a schematic diagram showing the composition of an intersatellite command forwarding system based on laser communication provided in this embodiment. Figure 2 The figure shows a functional schematic diagram of an intersatellite command forwarding system based on laser communication provided by this embodiment. The system specifically includes: a ground measurement and control station (1), a satellite-to-ground channel (2), a satellite A (3), a satellite B (4) and a laser link (18). It also includes: satellite-to-ground communication equipment A (5), satellite service (6), a control channel A (7), a control module A (8), a channel interface A (9), a communication module A (10), a laser terminal A (11), a laser terminal B (12), a communication module B (13), a channel interface B (14), a control module B (15), a control channel B (16) and satellite service B (17).

[0026] Among them, satellite-to-ground communication equipment A (5), satellite service A (6), and laser terminal A (11) are devices installed on satellite A (3). Satellite service B (17) and laser terminal B (12) are devices installed on satellite B (4). The control module A (8) and the communication module A (10) are software modules of the laser communication terminal A (11); the control module B (15) and the communication module B (13) are software modules of the laser communication terminal B (12); the satellite-to-ground channel (2) is a space information channel between the ground control station (1) and the satellite A (3); the control channel A (7) is a command transmission channel between the satellite service A (6) and the laser communication terminal A (11); the control channel B (16) is a command transmission channel between the satellite service B (17) and the laser communication terminal B (12); the channel interface A (9) is a data interface forwarding channel between the laser communication payload control module A (8) and the communication module A (10); the channel interface B (14) is a data interface forwarding channel between the laser communication payload control module B (15) and the communication module B (13); the laser link (18) is the core of the system and is a space forwarding channel between the laser terminal (A) and the laser terminal (B).

[0027] The working principle of this system is as follows: the ground control station sends the control command for satellite B to the satellite-to-ground communication equipment of satellite A within the visible arc through the satellite-to-ground channel. The satellite-to-ground communication equipment stores the command information in satellite service A. Then, satellite service A sends the command information to laser communication terminal A through the command channel between satellite service and laser. Inside laser communication terminal A, after the terminal recognizes it as a command for satellite B, it inserts the command as communication data into the communication data stream generated by the communication module through the interface of the control and communication software, such as Figure 3 Then, laser communication terminal A sends the information to the laser terminal of satellite B through the intersatellite laser link. After the internal communication module of the laser terminal recognizes and extracts the data, it transfers the command to satellite service B. Then, satellite service B operates satellite B according to the command information.

[0028] In summary, the inter-satellite command forwarding system based on laser communication proposed by the present invention uses a satellite-borne laser communication terminal to realize command forwarding. It is implemented by software on existing equipment without the need for other equipment or hardware resources. The technical effects of the present invention are:

[0029] (1) Through inter-satellite command forwarding, the ground tracking and control station can remotely monitor and control satellites in non-tracking areas in real time, including: (a) satellite platform control, such as attitude adjustment and orbit change; (b) satellite payload control, such as remote sensing camera data collection and communication equipment transmission and reception control;

[0030] (2) Furthermore, satellites in non-TT&C areas can be used to achieve communication interconnection and command forwarding with other ground, air, and ocean vehicles, thus realizing a real-time control closed loop of the sea, air, and space Internet.

[0031] Example 2

[0032] This embodiment provides another inter-satellite command forwarding system based on laser communication. The system composition is as follows: Figure 1 As shown, it includes: ground tracking and control station (1), satellite-to-ground channel (2), satellite A (3), satellite B (4), satellite-to-ground communication equipment A (5), satellite service (6), control channel A (7), control module A (8), channel interface A (9), communication module A (10), laser terminal A (11), laser terminal B (12), communication module B (13), channel interface B (14), control module B (15), control channel B (16), satellite service B (17), laser link (18). Specifically:

[0033] To verify the inter-satellite command forwarding function, in this embodiment, satellite A (3) and satellite B (4) are respectively a certain type of remote sensing satellite, weighing about 90 kg, equipped with laser terminal, VDES payload, camera payload, etc. Satellite-to-ground communication equipment A (5) is an X-signaling transceiver antenna mounted on satellite A, satellite service (6) and satellite service B (17) are satellite service computers of satellite A and satellite B respectively, laser terminal A (11) and laser terminal B (12) are laser communication terminals carried by satellite A and satellite B respectively, with an effective communication distance of 4800 km and a communication rate of 1 Gbps. Control channel A (7) and control channel B (16) are respectively CAN bus channels of satellite A and satellite B, using CAN2.0B standard. Control module A (8) and control module B (15) are respectively the main control software of laser terminal A and laser terminal B, realizing command transmission and reception, analysis and terminal control functions. Communication module A (10) and communication module B (13) are communication software modules of laser communication terminals A and B. Channel interface A (9) and channel interface B (14) are data interfaces between the laser control module and the communication module, and are set according to the instruction size, which is 64 bytes in this project; laser link (18) is the intersatellite link between laser terminal A and laser terminal B, and has a wavelength of 1550nm.

[0034] In actual engineering applications, the command control content includes camera switch, acquisition command, VDES communication start command, etc. The ground station can realize remote real-time acquisition of remote sensing data and command forwarding through the above command forwarding function.

[0035] In summary, the inter-satellite command forwarding system based on laser communication proposed by the present invention uses a satellite-borne laser communication terminal to realize command forwarding. It is implemented by software on existing equipment without the need for other equipment or hardware resources. The technical effects of the present invention are:

[0036] (1) Through inter-satellite command forwarding, the ground tracking and control station can remotely monitor and control satellites in non-tracking areas in real time, including: (a) satellite platform control, such as attitude adjustment and orbit change; (b) satellite payload control, such as remote sensing camera data collection and communication equipment transmission and reception control;

[0037] (2) Furthermore, satellites in non-TT&C areas can be used to achieve communication interconnection and command forwarding with other ground, air, and ocean vehicles, thus realizing a real-time control closed loop of the sea, air, and space Internet.

[0038] Example 3

[0039] This embodiment provides a method for forwarding inter-satellite instructions based on laser communication. The method specifically includes:

[0040] The ground tracking and control station sends the control instructions for satellite B to satellite A through the satellite-to-ground channel;

[0041] Satellite A forwards the control instruction to satellite B to satellite B via a laser link;

[0042] Among them, the satellite A is used to describe the satellite within the visible arc range of the ground tracking and control station; the satellite B is used to describe the satellite in the non-tracking and control arc range of the ground tracking and control station; the satellite-to-ground channel is the space information channel between the ground tracking and control station and satellite A; the laser link is the space forwarding channel between satellite A and satellite B.

[0043] It should be noted that a specific implementation of the steps of this method may be:

[0044] The ground tracking and control station sends the control instructions for satellite B to the satellite-to-ground communication equipment of satellite A within the visible arc through the satellite-to-ground channel. The satellite-to-ground communication equipment stores the instruction information in satellite service A. Then, satellite service A sends the instruction information to laser communication terminal A through the instruction channel between satellite service and laser. Inside laser communication terminal A, after the terminal recognizes it as an instruction to satellite B, it inserts the instruction as communication data into the communication data stream generated by the communication module through the interface of the control and communication software. Then, laser communication terminal A sends the information to the laser terminal of satellite B through the intersatellite laser link. After the communication module inside the laser terminal identifies and extracts the data, it transfers the instruction to satellite service B. Then, satellite service B implements the operation on satellite B according to the instruction information.

[0045] In summary, the inter-satellite command forwarding method based on laser communication proposed by the present invention uses a satellite-borne laser communication terminal to implement command forwarding. It is implemented by software on existing equipment without the need for other equipment or hardware resources. The technical effects of the present invention are:

[0046] (1) Through inter-satellite command forwarding, the ground tracking and control station can remotely monitor and control satellites in non-tracking areas in real time, including: (a) satellite platform control, such as attitude adjustment and orbit change; (b) satellite payload control, such as remote sensing camera data collection and communication equipment transmission and reception control;

[0047] (2) Furthermore, satellites in non-TT&C areas can be used to achieve communication interconnection and command forwarding with other ground, air, and ocean vehicles, thus realizing a real-time control closed loop of the sea, air, and space Internet.

[0048] The above description is only an embodiment of the present specification and is not intended to limit the present specification. For those skilled in the art, the present specification can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification should be included in the scope of the claims of the present specification.

Claims

1. An intersatellite command forwarding system based on laser communication, characterized in that: It includes ground tracking and control station, satellite A, satellite B, satellite-to-ground channel and laser link, among which: Satellite A is used to describe the satellite within the visible arc range of the ground tracking and control station; The satellite B is used to describe the satellite in the non-tracking arc of the ground tracking station; The satellite-to-ground channel is a space information channel between the ground tracking and control station and satellite A; the laser link is a space forwarding channel between satellite A and satellite B; The ground measurement and control station sends the control instructions for satellite B to satellite A through the satellite-to-ground channel, and satellite A forwards the control instructions for satellite B to satellite B through the laser link.

2. The system according to claim 1, characterized in that The satellite A and satellite B are respectively equipped with laser terminals, wherein: The laser terminal of the satellite A includes a control module A and a communication module A, and the laser terminal of the satellite B includes a control module B and a communication module B, wherein: The control module A is used to identify the control instruction for the satellite B, and insert the control instruction for the satellite B as communication data into the communication data stream generated by the communication module A; The communication module A is used to send the control instruction for the satellite B to the laser terminal of the satellite B through the laser link; The communication module B is used to identify and extract the control instruction for the satellite B and send it to the control module B; The control module B is used to perform control operations on the satellite B based on the control instructions for the satellite B.

3. The system according to claim 2, characterized in that The effective communication distance of the laser terminal is 4800km and the communication rate is 1Gbps.

4. The system according to claim 2, characterized in that The satellite A and satellite B also carry satellite services respectively, wherein: The satellite service is a satellite service computer for storing control instructions and performing control operations on the satellite according to the control instructions.

5. The system according to claim 4, characterized in that The satellite A and the satellite B also include control channels respectively, wherein: The control channel is a command transmission channel between the satellite service and the laser terminal.

6. The system according to claim 4, characterized in that The satellite A also includes satellite-to-ground communication equipment, wherein: The satellite-to-ground communication equipment is used to receive the control instruction for satellite B sent by the ground measurement and control station, and store the control instruction for satellite B in the satellite service of satellite A.

7. The system according to claim 6, characterized in that The satellite-to-ground communication equipment includes an X-signaling transceiver antenna.

8. The system according to claim 1, characterized in that The laser link is an inter-satellite link between the laser terminal of satellite A and the laser terminal of satellite B, and the wavelength band is 1550nm.

9. The system according to claim 1, characterized in that The control instructions for satellite B include operating instructions for the satellite B payload and control instructions for the entire satellite B. The operating instructions for the satellite B payload include camera switch instructions, data acquisition instructions and VDES communication start instructions. The control instructions for the entire satellite B include attitude orbit control and the entire satellite working mode.

10. A method for forwarding intersatellite instructions based on laser communication, characterized in that: include: The ground tracking and control station sends the control instructions for satellite B to satellite A through the satellite-to-ground channel; Satellite A forwards the control instruction to satellite B to satellite B via a laser link; The satellite A is used to describe the satellite within the visible arc of the ground tracking and control station; the satellite B is used to describe the satellite in the non-tracking and control arc of the ground tracking and control station; the satellite-to-ground channel is the space information channel between the ground tracking and control station and satellite A; The laser link is a space forwarding channel between satellite A and satellite B.

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