Spacecraft communication system based on data link communication technology

Abstract

The present application relates to the field of communication technology, in particular to an aerospace vehicle communication system based on data link communication technology, comprising: a control terminal, which is the master control terminal of the system and is used for issuing execution commands; and a docking module, which is used for uploading satellite space coordinates around the vehicle and enabling the vehicle to establish a communication connection with the satellite based on the satellite space coordinates around the vehicle; the present application can send first communication request information based on the respective space coordinates of the vehicle and the satellite, and then perform identity verification with a set verification key, so as to realize the communication connection between the vehicle and the satellite; and in the communication data interaction process after the communication connection, the actual communication data to be transmitted is masked in the form of synchronous transmission of any data in any format, so as to achieve the purpose of cover and bring a certain degree of security maintenance to the communication data transmission process.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more specifically to aerospace communication systems based on data link communication technology. Background Technology

[0002] Communication technology, also known as communication engineering, is an important branch of electronic engineering and a fundamental discipline. This discipline focuses on the principles and applications of information transmission and signal processing in communication processes. Communication engineering studies the transmission of information from a transmitter (source) to one or more receivers (destination) via electrical pulses in the form of electromagnetic waves, sound waves, or light waves. Aerospace communication is one type of communication technology.

[0003] However, the communication docking time between aerospace vehicles and ground terminals or satellites is relatively long, which affects communication efficiency to some extent. Furthermore, the encryption technology used in the communication process has not been updated for a long time, resulting in reduced communication security for aerospace vehicles.

[0004] To address this, an aerospace communication system based on data link communication technology is proposed. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an aerospace communication system based on data link communication technology, which solves the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] Aerospace communication systems based on data link communication technology include:

[0008] The control terminal is the main control terminal of the system, used to issue execution commands;

[0009] The docking module is used to upload the spatial coordinates of satellites around the spacecraft, and to establish a communication connection between the spacecraft and the satellites based on the spatial coordinates of the satellites around the spacecraft;

[0010] The positioning module is used to locate the real-time position relationship between the spacecraft and the satellite, and based on the real-time position relationship between the spacecraft and the satellite, to coordinate the direction of the spacecraft or satellite when they send communication request information to each other in real time.

[0011] The monitoring module is used to monitor the real-time communication behavior between the spacecraft and the satellite, and to collect and record the parameters of the communication behavior between the spacecraft and the satellite.

[0012] The reset module is used to reset system operation;

[0013] The feedback module is used to receive the communication behavior parameters between the spacecraft and the satellite recorded in the monitoring module, and further package the communication behavior parameters and send them to the control terminal.

[0014] The feedback module runs synchronously with the reset module. The reset module has a running cycle that is manually set by the system user. The reset module runs in real time according to the set running cycle to reset the system.

[0015] Furthermore, when the spacecraft establishes a communication connection with the satellite, the spacecraft sends a communication request based on the spatial coordinates of the satellites around the spacecraft. The satellite receives the communication request in real time, verifies the communication request, and then the spacecraft and the satellite synchronously store each other's communication IP addresses.

[0016] Furthermore, the communication request information includes a verification key. The verification key generation logic is stored in the spacecraft and the satellite. Before the spacecraft sends a communication request, the verification key generation logic runs synchronously in the spacecraft and the satellite to generate the same key. The satellite runs in real time to receive the verification key in the communication request information sent by the spacecraft and further compares it with the key generated internally. When the result is consistent, the spacecraft and the satellite store each other's communication IP addresses.

[0017] Furthermore, the verification key generation logic is represented as follows:

[0018]

[0019] In the formula: S key Key; n, q, y are all key stores; m i χ is the i-th key number in the keystore n; χ is the m i ×x θ y z The integer part of (xθ:yz) is The timestamp at the time of retrieval; h z μ is the z-th key symbol in the keystore q; μ is h z ×u λ v t The integer part; (uλ:vt) is The timestamp at the time of retrieval; r c Let c be the key number in keystore y; for The integer part; for The timestamp at the time of retrieval.

[0020] Furthermore, the right-hand side of the verification key generation logic representation formula All are referred to as key segments. When the verification key generation logic is applied, the system-side user uploads a specified number of key libraries to the spacecraft and satellite based on the ground signal base station, and the verification key is generated based on the uploaded key libraries and the verification key generation logic.

[0021] When the verification key generation logic uses more than three sets of key libraries, the application timestamps corresponding to the three sets of key segments sorted by time queue in the verification key generation logic are all corrected for time difference before participating in the key segment acquisition.

[0022] Furthermore, the time difference of the application timestamp corresponding to the key segment is calculated using the following formula:

[0023]

[0024] In the formula: TDEV(t) is the time difference; f is the interval between obtaining adjacent key segments; N is the total number of key segments contained in the verification key; x i Let τ be the predicted time error value for the i-th key segment; τ0 is the original measurement timestamp.

[0025] The values ​​of i+2f and i+f are both less than the value of N.

[0026] Furthermore, after the spacecraft and the satellite establish a communication connection, they perform an interaction of the running path before each communication ends. Based on the interaction results of the running path between the spacecraft and the satellite and their respective position information at the time of the communication connection, the positioning module sends a communication request message in the specified direction when the spacecraft and the satellite re-establish a communication connection.

[0027] The interaction between the spacecraft and the satellite before the end of each communication includes the direction of the operational path and the speed of the operational path.

[0028] Furthermore, the communication behavior parameters recorded in the monitoring module include: communication duration, target of receiving communication content, target of sending communication content, and communication start and end timestamps;

[0029] The monitoring module contains sub-modules, including:

[0030] A database is used to store data in any format.

[0031] When the monitoring module detects communication between the spacecraft and the satellite, it further identifies the target for receiving and sending the communication content based on the communication behavior parameters collected by the monitoring module. The spacecraft or satellite corresponding to the target for receiving the communication content is used as the control target, and the spacecraft or satellite is controlled to retrieve data from the database and send it to the spacecraft or satellite corresponding to the target for sending the communication content.

[0032] Furthermore, the data content retrieved from the database and sent by the spacecraft or satellite corresponding to the communication content sending target is greater than the communication content sent by the communication content sending target to the communication content receiving target, and the data content retrieved from the database takes precedence over the communication content in the transmission operation.

[0033] Furthermore, the control terminal is electrically connected to a docking module, a positioning module, and a monitoring module via a medium. The monitoring module is electrically connected to a database via a medium. The monitoring module is also electrically connected to a reset module and a feedback module via a medium. The feedback module is electrically connected to the control terminal via a medium.

[0034] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects:

[0035] 1. This invention provides an aerospace communication system based on data link communication technology. During operation, the system can send an initial communication request based on the spatial coordinates of the spacecraft and the satellite, and then authenticate the identity with a set verification key to realize the communication connection between the spacecraft and the satellite. In the communication data interaction process after the communication connection is established, the actual communication data to be transmitted is masked by transmitting arbitrary data in any format in opposite directions to achieve the purpose of covert protection and bring a certain degree of security protection to the communication data transmission process.

[0036] 2. During operation, the system of this invention can synchronously interact with the orbital trajectories of the spacecraft and satellite during the communication data exchange. By interacting with the orbital trajectories, the positioning operation can be made faster and more convenient when the spacecraft and satellite conduct the next communication connection operation, thereby ensuring the communication connection efficiency between the spacecraft and the satellite.

[0037] 3. During the operation of the system in this invention, the time difference of each key segment in the verification key can be calculated during the generation stage of the verification key, so as to ensure that the generated key used for verification is more accurate during the key consistency verification stage after the spacecraft and the satellite receive the communication request information. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0039] Figure 1This is a schematic diagram of the structure of an aerospace communication system based on data link communication technology;

[0040] Figure 2 This is a schematic diagram illustrating the process of generating and reconstructing the verification key stored in the communication request information in this invention;

[0041] The labels in the diagram represent: 1. Control terminal; 2. Dating module; 3. Positioning module; 4. Monitoring module; 5. Database; 6. Reset module; 7. Feedback module. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] The present invention will be further described below with reference to embodiments.

[0044] Example 1

[0045] This embodiment describes an aerospace communication system based on data link communication technology, such as... Figure 1 As shown, it includes:

[0046] Control terminal 1 is the main control terminal of the system, used to issue execution commands;

[0047] Docking module 2 is used to upload the spatial coordinates of satellites around the spacecraft, and to establish a communication connection between the spacecraft and the satellites based on the spatial coordinates of the satellites around the spacecraft;

[0048] Positioning module 3 is used to locate the real-time position relationship between the spacecraft and the satellite, and based on the real-time position relationship between the spacecraft and the satellite, to coordinate the direction of the spacecraft or satellite when they send communication request information to each other in real time.

[0049] Monitoring module 4 is used to monitor the real-time communication behavior between the spacecraft and the satellite, and to collect and record the parameters of the communication behavior between the spacecraft and the satellite.

[0050] Reset module 5 is used to reset system operation;

[0051] Feedback module 6 is used to receive the communication behavior parameters between the spacecraft and the satellite recorded in monitoring module 4, and further package the communication behavior parameters and send them to control terminal 1;

[0052] The feedback module 6 runs synchronously with the reset module 5. The reset module 5 has a running cycle manually set by the system user. The reset module 5 runs in real time according to the set running cycle to reset the system.

[0053] The logic for generating the verification key is as follows:

[0054]

[0055] In the formula: S key Key; n, q, y are all key stores; m i χ is the i-th key number in the keystore n; χ is the m i ×x θ y z The integer part of (xθ:yz) is The timestamp at the time of retrieval; h z μ is the z-th key symbol in the keystore q; μ is h z ×u λ v t The integer part; (uλ:vt) is The timestamp at the time of retrieval; r c Let c be the key number in keystore y; for The integer part; for The timestamp at the time of retrieval.

[0056] like Figure 1 As shown, the right side of the verification key generation logic representation formula All are recorded as key segments. When the verification key generation logic is applied, the system-side user uploads a specified number of key libraries to the spacecraft and satellite based on the ground signal base station. The verification key is generated based on the uploaded key libraries and the verification key generation logic.

[0057] When the verification key generation logic uses more than three sets of key libraries, the application timestamps corresponding to the three sets of key segments sorted by time queue in the verification key generation logic are all corrected for time difference before participating in the key segment acquisition.

[0058] The control terminal 1 is electrically connected to the docking module 2, the positioning module 3 and the monitoring module 4 via a medium. The monitoring module 4 is electrically connected to the database 41 via a medium. The monitoring module 4 is also electrically connected to the reset module 5 and the feedback module 6 via a medium. The feedback module 6 is electrically connected to the control terminal 1 via a medium.

[0059] In this embodiment, the control terminal 1 controls the docking module 2 to upload the spatial coordinates of satellites surrounding the spacecraft. Based on the spatial coordinates of satellites surrounding the spacecraft, the spacecraft establishes a communication connection with the satellites. The positioning module 3 locates the real-time position relationship between the spacecraft and the satellites. Based on the real-time position relationship between the spacecraft and the satellites, the direction of the spacecraft or satellites when sending communication request information to each other is coordinated in real time. The monitoring module 4 runs synchronously to monitor the real-time communication behavior between the spacecraft and the satellites, and collects and records the parameters of the communication behavior between the spacecraft and the satellites. Finally, the reset module 5 controls the operation of the reset system. The feedback module 6 runs synchronously with the reset module 5, receives the communication behavior parameters between the spacecraft and the satellites recorded in the monitoring module 4, and further packages the communication behavior parameters and sends them to the control terminal 1.

[0060] Meanwhile, the verification key generation logic formula described above ensures the stable generation of the verification key, providing security for the communication interaction process between spacecraft and satellite.

[0061] Example 2

[0062] At the implementation level, based on Example 1, this example refers to... Figure 1 The aerospace communication system based on data link communication technology in Example 1 will be further described in detail below:

[0063] When a spacecraft establishes a communication connection with a satellite, the spacecraft sends a communication request based on the spatial coordinates of the satellites around it. The satellite receives the communication request in real time and verifies it. Then, the spacecraft and the satellite synchronously store each other's communication IP addresses.

[0064] The communication request information contains a verification key. The verification key generation logic is stored in the spacecraft and the satellite. Before the spacecraft sends a communication request, the verification key generation logic runs synchronously in the spacecraft and the satellite to generate the same key. The satellite runs in real time to receive the verification key in the communication request information sent by the spacecraft and further compares it with the key generated internally. When the result is consistent, the spacecraft and the satellite perform mutual communication IP address storage.

[0065] The above settings further limit the source path of the verification key, ensuring that spacecraft and satellite can verify the security of their respective operational status through the verification key and complete the exchange of communication data in a secure environment.

[0066] like Figure 1 As shown, the time difference of the application timestamp corresponding to the key segment is calculated using the following formula:

[0067]

[0068] In the formula: TDEV(t) is the time difference; f is the interval between obtaining adjacent key segments; N is the total number of key segments contained in the verification key; x i Let τ be the predicted time error value for the i-th key segment; τ0 is the original measurement timestamp.

[0069] The values ​​of i+2f and i+f are both less than the value of N.

[0070] The above formula can be used to calculate the time difference of the application timestamp corresponding to the key segment, thereby ensuring that the keys generated in spacecraft and satellites for verification are consistent at the key generation logic level, and thus ensuring that the generated keys are consistent when both are operating normally.

[0071] like Figure 1 As shown, after the spacecraft and the satellite establish a communication connection, they perform an interaction of the running path before each communication ends. Based on the interaction results of the running path between the spacecraft and the satellite and their respective position information during the communication connection, the positioning module 3 sends a communication request message in the specified direction when the spacecraft and the satellite re-establish a communication connection.

[0072] The interaction between the spacecraft and the satellite before the end of each communication includes the direction of the operational path and the speed of the operational path.

[0073] The above settings further limit the data content that the spacecraft and satellite will exchange during the communication reception phase, ensuring that they have the conditions for a quick connection when they reconnect.

[0074] Example 3

[0075] At the implementation level, based on Example 1, this example refers to... Figure 1 The aerospace communication system based on data link communication technology in Example 1 will be further described in detail below:

[0076] The communication behavior parameters recorded in monitoring module 4 include: communication duration, target of receiving communication content, target of sending communication content, and communication start and end timestamps;

[0077] Monitoring module 4 contains sub-modules, including:

[0078] Database 41 is used to store arbitrary data in any format;

[0079] When the monitoring module 4 detects communication between the spacecraft and the satellite, it further identifies the target for receiving and sending the communication content based on the communication behavior parameters collected by the monitoring module 4. The spacecraft or satellite corresponding to the target for receiving the communication content is used as the control target, and the spacecraft or satellite is controlled to retrieve data from the database 41 and send it to the spacecraft or satellite corresponding to the target for sending the communication content.

[0080] like Figure 1 As shown, the data content retrieved from database 41 sent by the spacecraft or satellite corresponding to the communication content sending target is greater than the communication content sent by the communication content sending target to the communication content receiving target. The data content retrieved from database 41 takes precedence over the communication content in the transmission operation.

[0081] By setting up the database 41, when communication content is transmitted by spacecraft or satellite, the useless data stored in the database 41 is used as the target of the attack, which provides a certain degree of cover for the actual communication data to be transmitted and minimizes the risk of communication data being stolen during transmission.

[0082] In summary, the system in the above embodiments can send the initial communication request information based on the respective spatial coordinates of the spacecraft and the satellite, and then perform identity verification using a set verification key, thereby realizing the communication connection between the spacecraft and the satellite. Furthermore, during the communication data exchange process after the connection is established, the actual communication data to be transmitted is simultaneously masked by transmitting arbitrary data in any format, achieving a degree of security protection for the communication data transmission process. During operation, the system can synchronously interact with the orbital trajectories of the spacecraft and satellite during the communication data exchange process. This interaction ensures that the positioning operation is faster and more convenient during subsequent communication connection operations, thus ensuring the efficiency of the communication connection between the spacecraft and the satellite. Simultaneously, during operation, the system can also calculate the time difference of each key segment in the verification key during the generation stage, ensuring that the generated key used for verification during the key consistency verification stage after the spacecraft and satellite receive the communication request information is more accurate.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aerospace communication system based on data link communication technology, characterized in that, include: The control terminal (1) is the main control terminal of the system, used to issue execution commands; The docking module (2) is used to upload the spatial coordinates of satellites around the spacecraft and establish a communication connection between the spacecraft and the satellites based on the spatial coordinates of satellites around the spacecraft. The positioning module (3) is used to locate the real-time position relationship between the spacecraft and the satellite, and to coordinate the direction of the spacecraft or the satellite in real time when they send communication request information to each other based on the real-time position relationship between the spacecraft and the satellite. The monitoring module (4) is used to monitor the real-time communication behavior between the spacecraft and the satellite, and to collect and record the parameters of the communication behavior between the spacecraft and the satellite. The reset module (5) is used to reset the system operation; Feedback module (6) is used to receive the communication behavior parameters between the spacecraft and the satellite recorded in monitoring module (4), and further package the communication behavior parameters and send them to control terminal (1); Among them, the feedback module (6) runs synchronously with the reset module (5). The system user manually sets the running cycle in the reset module (5). The reset module (5) runs in real time according to the set running cycle to reset the system. The communication request information contains a verification key. The verification key generation logic is stored in the spacecraft and the satellite. Before the spacecraft sends a communication request, the verification key generation logic runs synchronously in the spacecraft and the satellite to generate the same key. The satellite runs in real time to receive the verification key in the communication request information sent by the spacecraft and further compares it with the key generated internally. When the result is consistent, the spacecraft and the satellite store each other's communication IP addresses. The verification key generation logic is represented as follows: ； In the formula: For the key; , , All are keystores; For keystore The Middle One key number; for The integer part, for The timestamp at the time of retrieval; For keystore The Middle One key number; for The integer part; for The timestamp at the time of retrieval; For keystore The Middle One key number; for The integer part; for The timestamp at the time of retrieval.

2. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, When the spacecraft establishes a communication connection with the satellite, the spacecraft sends a communication request based on the spatial coordinates of the surrounding satellites. The satellite receives the communication request in real time, verifies the communication request, and then the spacecraft and the satellite synchronously store each other's communication IP addresses.

3. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, The verification key generation logic is represented on the right side of the formula. All are referred to as key segments. When the verification key generation logic is applied, the system-side user uploads a specified number of key libraries to the spacecraft and satellite based on the ground signal base station, and the verification key is generated based on the uploaded key libraries and the verification key generation logic. When the verification key generation logic uses more than three sets of key libraries, the application timestamps corresponding to the three sets of key segments sorted by time queue in the verification key generation logic are all corrected for time difference before participating in the key segment acquisition.

4. The aerospace communication system based on data link communication technology according to claim 3, characterized in that, The time difference of the application timestamp corresponding to the key segment is calculated using the following formula: ； In the formula: Time difference; Calculate the interval time between adjacent key segments; To verify the total number of key segments contained in the key; for Predicted time error values ​​for each key segment; Original measurement timestamp; in, , The values ​​are all less than The value of .

5. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, After the spacecraft and the satellite establish a communication connection, they perform an interaction of the running path before each communication ends. The positioning module (3) sends a communication request message in a specified direction when the spacecraft and the satellite re-establish a communication connection based on the interaction results of the running path between the spacecraft and the satellite and their respective position information during the communication connection. The interaction between the spacecraft and the satellite before the end of each communication includes the direction of the operational path and the speed of the operational path.

6. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, The communication behavior parameters recorded in the monitoring module (4) include: communication duration, target of receiving communication content, target of sending communication content, and communication start and end timestamps; The monitoring module (4) has a sub-module, including: Database (41) is used to store arbitrary data in any format; When the monitoring module (4) detects communication behavior between the spacecraft and the satellite, it further identifies the target for receiving the communication content and the target for sending the communication content based on the communication behavior parameters collected by the monitoring module (4). The spacecraft or satellite corresponding to the target for receiving the communication content is used as the control target, and the spacecraft or satellite is controlled to retrieve data from the database (41) and send it to the spacecraft or satellite corresponding to the target for sending the communication content.

7. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, The data content retrieved from the database (41) sent by the spacecraft or satellite corresponding to the target of the communication content sending is greater than the communication content sent by the target of the communication content sending to the target of the communication content receiving. The data content retrieved from the database (41) takes precedence over the communication content in the sending operation.

8. The aerospace communication system based on data link communication technology according to claim 1, characterized in that, The control terminal (1) is electrically connected to a docking module (2), a positioning module (3) and a monitoring module (4) via a medium. The monitoring module (4) is electrically connected to a database (41) via a medium. The monitoring module (4) is electrically connected to a reset module (5) and a feedback module (6) via a medium. The feedback module (6) is electrically connected to the control terminal (1) via a medium.

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