Communication method based on multi-level bidirectional space communication link

Abstract

The invention relates to a communication method, in particular to a communication method based on a bidirectional space communication link. Comprising the following steps: 1) configuring parameters; 2) integrating each bidirectional space communication link, establishing a bidirectional space communication link network, and setting a communication level; 3) selecting the bidirectional space communication link with the shortest communication distance in the corresponding communication level as required for communication; 4) judging the on-off state of the two-way space communication link, and if the two-way space communication link is in a smooth state, executing the step 5); if the bidirectional space communication link is in the disconnected state, the step 3) is executed again; according to the invention, the bidirectional space communication link network is used for communication, and when any bidirectional space communication link cannot communicate, the bidirectional space communication link network can be switched to other bidirectional space communication links in the bidirectional space communication link network for communication, so that the anti-interference capability of equipment is improved.

Description

Technical Field

[0001] This invention relates to communication methods, and more specifically to a communication method based on a multi-level bidirectional space communication link. Background Technology

[0002] Space activities have gradually expanded from simple near-Earth telemetry in the early stages to complex mission scenarios such as deep space exploration, manned flight, and massive data transmission. The core requirement is to achieve precise control of spacecraft, real-time status monitoring, reliable command uploading, and efficient scientific data downloading—this is the core "lifeline" to ensure that spacecraft remain connected throughout the entire process and that space missions are successfully completed.

[0003] Data transmission in space missions mainly relies on space links. Space link communication is an information network system with the ability to transmit digital information in real time. This system uses communication networks as the link and information processing as the core. It can realize the interconnection of land, sea, air and space perception systems. Through single network or multi-network architecture and adapted communication media, it can connect two or more command and control systems and mission payload systems to complete the stable transmission of standardized digital information according to the established format and protocol.

[0004] However, conventional space communication links are highly susceptible to interference from external environmental factors in practical applications, which can cause communication interruptions. Moreover, communication can only be restored after the interference is eliminated, making it difficult to continuously guarantee the command center's high-precision control needs for spacecraft and failing to meet the reliability requirements of complex space missions. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem that existing space communication links are easily affected by external environmental factors, causing communication interruptions, and can only be restored after the interference is eliminated, making it difficult to continuously guarantee the command center's high-precision control requirements for spacecraft. The invention provides a communication method based on a multi-level bidirectional space communication link.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A communication method based on a multi-level bidirectional space communication link includes the following steps: 1) Configuration parameters To mount communication terminal payloads and service center payloads on various command centers, relay equipment, and terminal equipment in the communication network; At the same time, the equipment ID is configured in the business center payload, and the receiving and sending parameters are configured in the communication terminal payload; 2) Establish link Integrate the two-way space communication links between various command centers, terminal equipment and relay equipment that meet the communication distance requirements to establish a two-way space communication link network; The communication level is set for each bidirectional space communication link in the bidirectional space communication link network according to the frequency range in the receiving and transmitting parameters. 3) Selecting a communication link Command centers or terminal equipment can select the shortest two-way space communication link within the corresponding communication level for communication as needed within the two-way space communication link network. 4) Link connectivity determination The command center or terminal equipment relies on the signal-to-noise ratio of the communication terminal payload. Useful signal power Pr, noise power N, and received interference power judge and The relationship between them; like If the two-way space communication link is in a working state, proceed to step 5). like If the two-way space communication link is disconnected, then exclude that two-way space communication link and execute step 3 on the remaining two-way space communication links. 5) Link communication The command center transmits instructions to terminal devices via a two-way space communication link; Alternatively, the terminal equipment can transmit the detection information to the command center via a two-way space communication link, where it can then be displayed.

[0007] Further, in step 1), the receiving parameters include gain, sensitivity, bandwidth, frequency, frequency range, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor; The transmission parameters include power, gain, loss, frequency, frequency range, beamwidth, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor.

[0008] Furthermore, in step 2), the specific method for establishing a two-way space communication link network is as follows: The command center and terminal equipment search for relay devices that meet the communication distance requirements; It iterates through each command center, terminal device, and relay device that meets the communication distance requirement, and determines whether the frequency, frequency range, antenna polarization, modulation method, communication system, effective omnidirectional radiated power, and quality factor of the command center, terminal device, and relay device that meet the communication distance requirement are completely consistent. If they are completely consistent, then a two-way space communication link is established between the command center, relay equipment and terminal equipment; If they are inconsistent, the two-way space communication link will fail to be established; The two-way space communication links between various command centers, terminal equipment and relay equipment that meet the communication distance requirements are integrated to form a two-way space communication link network.

[0009] Furthermore, in step 2), the specific method for setting the communication level is as follows: Based on the frequency range, bidirectional space communication links are divided into multiple communication levels; Traverse each bidirectional space communication link in the bidirectional space communication link network, and compare the frequency ranges of the command center, relay equipment and terminal equipment in the bidirectional space communication link with the frequency ranges corresponding to multiple communication levels one by one; If the frequency range of the command center, relay equipment, and terminal equipment in a two-way space communication link is the same as the frequency range corresponding to the communication level, then the communication level is set as the communication level of the two-way space communication link.

[0010] Furthermore, in step 4), the specific method for determining link connectivity is as follows: Calculate the signal-to-noise ratio of the communication terminal payload : ; In the formula: The useful signal power received by the receiver is represented in dB; N is the noise power of the receiver in dB. The power interference received by the receiver is represented in dB. Calculate the useful signal power Pr of the communication terminal payload: ; In the formula: The power of the useful signal received by the communication receiver; This is the transmit power input to the antenna port; The gain of the transmitting antenna of the communication device in the direction of the receiving antenna; The angle between the transmitting antenna and the receiving antenna in the transmitting antenna coordinate system; This refers to the radio wave propagation loss from the communication transmitter to the communication receiver. The receiving gain of the antenna at the communication receiver in the transmission direction of the communication transmitter. The angle between the receiving antenna and the transmitting antenna in the receiving antenna coordinate system; Calculate the noise power N of the communication terminal payload: ; In the formula: Use the receiver's receiving bandwidth for the noise bandwidth (Hz); This represents the noise figure of the receiver; Calculate the interference power received by the communication terminal payload : ; In the formula: The transmit power input to the antenna port of the jamming device transmitter; The transmit gain of the interference-resistant device's transmitting antenna facing the receiving antenna of the communication receiver; The angle between the transmitting antenna and the receiving antenna of the jamming device in the coordinate system of the transmitting antenna of the jamming device: This refers to the radio wave propagation loss from the interfering device to the communication receiver. The receiving gain of the communication receiver antenna in the direction of interference; This represents the angle in the coordinate system of the transmitting antenna of the jamming device, representing the direction from the transmitting antenna to the receiving antenna. This refers to polarization isolation loss caused by antenna polarization mismatch. Frequency-dependent suppression is used to measure the degree of suppression of unwanted transmitter transmission spectrum generated by the receiver's selectivity curve; judge and The relationship between them: like If so, the link is working smoothly; like If so, the link is broken.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The communication method based on multi-level bidirectional space communication links provided by this invention integrates bidirectional space communication links between various command centers, terminal devices, and relay devices that meet the communication distance requirements to form a bidirectional space communication link network. Communication is conducted using this network, and if any one bidirectional space communication link fails, communication can be switched to another bidirectional space communication link within the network, improving the device's anti-interference capability. Furthermore, by setting different communication levels for each bidirectional space communication link in the network according to frequency range, command centers or terminal devices can select the appropriate communication level bidirectional space communication link as needed during communication, which helps improve communication efficiency and speed. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2This is a schematic diagram illustrating the process of establishing a two-way space communication link in an embodiment of the present invention; Figure 3 This is a flowchart illustrating the process of determining the connectivity status of a bidirectional space communication link in an embodiment of the present invention. Figure 4 This is a flowchart illustrating the process of setting the communication level of a bidirectional space communication link in other embodiments of the present invention. Detailed Implementation

[0013] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] like Figure 1 As shown, a communication method based on a multi-level bidirectional space communication link includes the following steps: 1) Configuration parameters To mount communication terminal payloads and service center payloads on various command centers, relay equipment, and terminal equipment in the communication network; At the same time, the equipment ID is configured in the business center payload, and the receiving and sending parameters are configured in the communication terminal payload; The receiving parameters include gain, sensitivity, bandwidth, frequency, frequency range, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor. The transmission parameters include power, gain, loss, frequency, frequency range, beamwidth, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor. 2) Establish link like Figure 2 As shown, the command center and terminal equipment search for relay devices that meet the communication distance requirements; It iterates through each command center, terminal device, and relay device that meets the communication distance requirement, and determines whether the frequency, frequency range, antenna polarization, modulation method, communication system, effective omnidirectional radiated power, and quality factor of the command center, terminal device, and relay device that meet the communication distance requirement are completely consistent. If they are completely consistent, then a two-way space communication link is established between the command center, relay equipment and terminal equipment; If they are inconsistent, the two-way space communication link will fail to be established; Integrate the two-way space communication links between various command centers, terminal equipment and relay equipment that meet the communication distance requirements to form a two-way space communication link network; like Figure 4As shown, the bidirectional space communication link is divided into multiple communication levels based on the frequency range. In this embodiment, the communication level of the bidirectional space communication link can be divided into 1 to 10 levels as needed. Different communication levels correspond to different frequency ranges, which can avoid mutual interference between bidirectional space communication links. Through this level system, comprehensive data link coverage from strategic to tactical levels can be achieved, enabling reasonable resource allocation and providing limited guarantees for bidirectional space communication link communication. Traverse each bidirectional space communication link in the bidirectional space communication link network, and compare the frequency ranges of the command center, relay equipment and terminal equipment in the bidirectional space communication link with the frequency ranges corresponding to multiple communication levels one by one; If the frequency range of the command center, relay equipment, and terminal equipment in a two-way space communication link is the same as the frequency range corresponding to the communication level, then the communication level is set as the communication level of the two-way space communication link.

[0015] 3) Selecting a communication link Command centers or terminal equipment can select the shortest two-way space communication link within the corresponding communication level for communication as needed within the two-way space communication link network. 4) Link connectivity determination like Figure 3 As shown, the signal-to-noise ratio of the communication terminal payload is calculated. : ; In the formula: The useful signal power received by the receiver is represented in dB; N is the noise power of the receiver in dB. The power interference received by the receiver is represented in dB. Calculate the useful signal power Pr of the communication terminal payload: ; In the formula: The power of the useful signal received by the communication receiver; This is the transmit power input to the antenna port; The gain of the transmitting antenna of the communication device in the direction of the receiving antenna; The angle between the transmitting antenna and the receiving antenna in the transmitting antenna coordinate system; This refers to the radio wave propagation loss from the communication transmitter to the communication receiver. The receiving gain of the antenna at the communication receiver in the transmission direction of the communication transmitter. The angle between the receiving antenna and the transmitting antenna in the receiving antenna coordinate system; Calculate the noise power N of the communication terminal payload: ; In the formula: Use the receiver's receiving bandwidth for the noise bandwidth (Hz); This represents the noise figure of the receiver; Calculate the interference power received by the communication terminal payload : ; In the formula: The transmit power input to the antenna port of the jamming device transmitter; The transmit gain of the interference-resistant device's transmitting antenna facing the receiving antenna of the communication receiver; The angle between the transmitting antenna and the receiving antenna of the jamming device in the coordinate system of the transmitting antenna of the jamming device: This refers to the radio wave propagation loss from the interfering device to the communication receiver. The receiving gain of the communication receiver antenna in the direction of interference; This represents the angle in the coordinate system of the transmitting antenna of the jamming device, representing the direction from the transmitting antenna to the receiving antenna. This refers to polarization isolation loss caused by antenna polarization mismatch. Frequency-dependent suppression is used to measure the degree of suppression of unwanted transmitter transmission spectrum generated by the receiver's selectivity curve; judge and The relationship between them; like If the two-way space communication link is in a working state, proceed to step 5). like If the two-way space communication link is disconnected, then exclude that two-way space communication link and execute step 3 on the remaining two-way space communication links. 5) Link communication The command center transmits instructions to terminal devices via a two-way space communication link; Alternatively, the terminal equipment can transmit the detection information to the command center via a two-way space communication link, where it can then be displayed.

[0016] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A communication method based on a multi-level bidirectional space communication link, characterized in that, Includes the following steps: 1) Configuration parameters To mount communication terminal payloads and service center payloads on various command centers, relay equipment, and terminal equipment in the communication network; At the same time, the equipment ID is configured in the business center payload, and the receiving and sending parameters are configured in the communication terminal payload; 2) Establish link Integrate the two-way space communication links between various command centers, terminal equipment and relay equipment that meet the communication distance requirements to establish a two-way space communication link network; The communication level is set for each bidirectional space communication link in the bidirectional space communication link network according to the frequency range in the receiving and transmitting parameters. 3) Selecting a communication link Command centers or terminal equipment can select the shortest two-way space communication link within the corresponding communication level for communication as needed within the two-way space communication link network. 4) Link connectivity determination The command center or terminal equipment relies on the signal-to-noise ratio of the communication terminal payload. Useful signal power Pr, noise power N, and received interference power judge and The relationship between them; like If the two-way space communication link is in a working state, proceed to step 5). like If the two-way space communication link is disconnected, then exclude that two-way space communication link and execute step 3 in the remaining two-way space communication links. 5) Link communication The command center transmits instructions to terminal devices via a two-way space communication link; Alternatively, the terminal equipment can transmit the detection information to the command center via a two-way space communication link, where it can then be displayed.

2. The communication method based on a multi-level bidirectional space communication link according to claim 1, characterized in that: In step 1), the receiving parameters include gain, sensitivity, bandwidth, frequency, frequency range, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor. The transmission parameters include power, gain, loss, frequency, frequency range, beamwidth, elevation angle, antenna polarization, modulation method, communication system, effective isotropic radiated power, and quality factor.

3. The communication method based on a multi-level bidirectional space communication link according to claim 2, characterized in that, In step 2), the specific method for establishing a two-way space communication link network is as follows: The command center and terminal equipment search for relay devices that meet the communication distance requirements; It iterates through each command center, terminal device, and relay device that meets the communication distance requirement, and determines whether the frequency, frequency range, antenna polarization, modulation method, communication system, effective omnidirectional radiated power, and quality factor of the command center, terminal device, and relay device that meet the communication distance requirement are completely consistent. If they are completely consistent, then a two-way space communication link is established between the command center, relay equipment and terminal equipment; If they are inconsistent, the two-way space communication link will fail to be established; The two-way space communication links between various command centers, terminal equipment and relay equipment that meet the communication distance requirements are integrated to form a two-way space communication link network.

4. The communication method based on a multi-level bidirectional space communication link according to claim 2, characterized in that, In step 2), the specific method for setting the communication level is as follows: Based on the frequency range, bidirectional space communication links are divided into multiple communication levels; Traverse each bidirectional space communication link in the bidirectional space communication link network, and compare the frequency ranges of the command center, relay equipment and terminal equipment in the bidirectional space communication link with the frequency ranges corresponding to multiple communication levels one by one; If the frequency range of the command center, relay equipment, and terminal equipment in a two-way space communication link is the same as the frequency range corresponding to the communication level, then the communication level is set as the communication level of the two-way space communication link.

5. The communication method based on a multi-level bidirectional space communication link according to claim 1, characterized in that, In step 4), the specific method for determining link connectivity is as follows: Calculate the signal-to-noise ratio of the communication terminal payload : ； In the formula: The useful signal power received by the receiver is represented in dB; N is the noise power of the receiver in dB. The power interference received by the receiver is represented in dB. Calculate the useful signal power Pr of the communication terminal payload: ； In the formula: The power of the useful signal received by the communication receiver; This is the transmit power input to the antenna port; The gain of the transmitting antenna of the communication device in the direction of the receiving antenna; The angle between the transmitting antenna and the receiving antenna in the transmitting antenna coordinate system; This refers to the radio wave propagation loss from the communication transmitter to the communication receiver. The receiving gain of the antenna at the communication receiver in the transmission direction of the communication transmitter. The angle between the receiving antenna and the transmitting antenna in the receiving antenna coordinate system; Calculate the noise power N of the communication terminal payload: ； In the formula: Use the receiver's receiving bandwidth for the noise bandwidth (Hz); This represents the noise figure of the receiver; Calculate the interference power received by the communication terminal payload : ； In the formula: The transmit power input to the antenna port of the jamming device transmitter; The transmit gain of the interference-resistant device's transmitting antenna facing the receiving antenna of the communication receiver; The angle between the transmitting antenna and the receiving antenna of the jamming device in the coordinate system of the transmitting antenna of the jamming device: This refers to the radio wave propagation loss from the interfering device to the communication receiver. The receiving gain of the communication receiver antenna in the direction of interference; This represents the angle in the coordinate system of the transmitting antenna of the jamming device, representing the direction from the transmitting antenna to the receiving antenna. This refers to polarization isolation loss caused by antenna polarization mismatch. Frequency-dependent suppression is used to measure the degree of suppression of unwanted transmitter transmission spectrum generated by the receiver's selectivity curve; judge and The relationship between them: like If so, the link is working smoothly; like If so, the link is broken.

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