Wireless communication decision-making system for multi-task complex environment

Abstract

The invention discloses a wireless communication decision-making system for a multi-task complex environment. The wireless communication decision-making system runs in a wireless communication system architecture. The wireless communication decision-making system comprises six core modules including a system initialization module, a multi-source data receiving module, a precise control algorithm module, a dynamic relay satellite switching module, an efficient telemetry data subpackage module and a state monitoring and link transmission module. The main function of the wireless communication decision-making system is to monitor the operation state of a spacecraft, receive flight data, and carry out telemetering transmission on the data in a comprehensive subpackage mode through a satellite or a foundation mode. In the flight process, the wireless communication decision-making system formulates a satellite communication link control strategy in real time according to the monitored state of the spacecraft, and the satellite communication link control strategy is used for selecting a communication satellite or controlling satellite communication equipment to conduct communication. The wireless communication decision-making system is located in a key path of antenna angle control in a wireless communication system architecture, the real-time performance is high, and the dependence is strong.

Description

Technical Field

[0001] The present application relates to the technical field of aerospace line communication systems, and in particular to a wireless communication decision-making system for multi-task complex environments. Background Art

[0002] With the rapid development of aerospace technology, the complexity and diversity of space missions are increasing, which puts higher requirements on wireless communication systems. Under the same hardware conditions, ensuring the stability and reliability of communication links through software system optimization and redundant strategy design is the key to achieving mission success. Traditional wireless communication decision systems are often limited by problems such as insufficient angle control accuracy, untimely switching of relay satellites, and low data transmission efficiency. These defects are particularly prominent in complex aerospace activities, which directly affect the quality of data return and the timeliness of mission execution.

[0003] (1) Angle control accuracy defects: Previous antenna angle control technologies mostly relied on relatively simple model prediction and control strategies, which resulted in difficulty in achieving high-precision and fast-response adjustment of the antenna angle under high-speed maneuvers or complex orbital conditions, which easily caused communication interruption or quality degradation.

[0004] (2) Relay satellite switching lag: Traditional relay satellite switching mechanisms are often based on preset rules and manual intervention. They lack the ability to dynamically evaluate the real-time link status and spacecraft operating status. When the spacecraft's motion posture changes rapidly, it is easy to cause communication blind spots, affecting the continuity of the communication link.

[0005] (3) Inefficient data transmission: Due to limited wireless link bandwidth and non-optimized data transmission strategies, a large amount of critical telemetry data cannot be transmitted efficiently, which not only wastes valuable communication resources, but also may affect the timely issuance of key instructions and the recovery of important data due to data accumulation. Summary of the invention

[0006] The present application provides a wireless communication decision-making system for multi-task complex environments. Through the integrated design of six core modules, including system initialization module, multi-source data receiving module, precise control algorithm module, dynamic relay satellite switching module, efficient telemetry data packetization module, and status monitoring and link transmission module, the whole chain optimization from system configuration, data processing, angle control, relay switching, status monitoring to data transmission is realized. The system not only improves the accuracy and response speed of antenna angle control, realizes the intelligent switching of dynamic relay satellites, but also greatly improves the efficiency of data processing and transmission, ensures the efficient and stable execution of aerospace communication tasks, and significantly enhances the adaptability, robustness and resource utilization of aerospace communication systems, providing strong support for future aerospace missions.

[0007] In the first aspect, a wireless communication decision system for multi-task complex environment is provided, including a system initialization module, a multi-source data receiving module, a precise control algorithm module, a dynamic relay satellite switching module, an efficient telemetry data packetization module, and a status monitoring and link transmission module;

[0008] The system initialization module is used to perform basic configuration of the system kernel;

[0009] The multi-source data receiving module is used to receive ground commands and status feedback data of various external devices, as well as real-time monitoring and integration of various switch quantities and voltage signals;

[0010] The precise control algorithm module is used to calculate the optimal conversion angle of the phased array antenna relative to the target relay satellite based on the real-time attitude and orbital parameters of the spacecraft and the position information of the relay satellite;

[0011] The dynamic relay satellite switching module is used to automatically perform the relay satellite switching operation by analyzing the preset satellite switching conditions in real time and determining the timing;

[0012] The efficient telemetry data packetization module forms data packets by intelligently filtering and reorganizing the information of the control system, and uses the circular queue cache mechanism for storage and scheduling.

[0013] In combination with the first aspect, in some implementations of the first aspect, the basic configuration performed by the system initialization module includes: system clock frequency, configuring communication interface protocol, and initializing key global variables.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the multi-source data receiving module adopts a high-throughput data processing architecture, captures the control system data stream through a bus interface, uses a serial communication interface to safely receive ground commands and status feedback data of various external devices, and integrates digital input and output DI / DO and analog signal acquisition AD / DA functions to achieve real-time monitoring and integration of various switch quantities and voltage signals.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the precise control algorithm module first acquires and establishes the attitude parameters of the spacecraft and the real-time position information of the relay satellite through integrated data acquisition and initialization steps, and then performs relative attitude calculation; on this basis, the actual antenna angle is compared with the ideal azimuth, the pitch and yaw deviations are clarified, and the precise instructions for antenna adjustment are calculated in real time based on the deviation value, and transmitted to the antenna drive system to execute angle adjustment; at the same time, the system implements closed-loop feedback control, and collects new attitude data in real time to evaluate the adjustment effect until the predetermined azimuth accuracy standard is reached.

[0016] In combination with the first aspect, in some implementations of the first aspect, the precise control algorithm module is used to execute the pointing algorithm timing scheduling and calculation path planning optimization, and the execution process includes:

[0017] Path decomposition and stage target caching: Decompose the algorithm execution path into several steps, cache the intermediate calculation results for each step, and dynamically call the calculation results of a single step while the algorithm input continues to scroll, reducing the waiting time of a single step;

[0018] Optimization of overlapping subproblems: The pointing of the spacecraft relative to the satellite varies according to the frequency of the spacecraft position and speed changes. The algorithm dynamically evaluates the attitude adjustment results. For periodic and repetitive pointing tasks, the stage target cache is reused to reduce repeated calculation time.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the dynamic parameters based on the real-time position information, speed, and flight altitude of the spacecraft, and the performance indicators of the current communication link, including signal strength, transmission delay, and error rate, autonomously monitor whether the current parameters exceed a preset operation threshold, and determine whether there is a risk of link degradation or imminent communication interruption;

[0020] When monitoring data indicates that the existing communication link no longer meets the mission requirements, the candidate relay satellite with the best relative position to the spacecraft and the highest expected communication quality is quickly calculated based on the current spacecraft's flight trajectory and the real-time position information of the relay satellite network. The calculation process comprehensively considers the satellite's accessibility, signal coverage capability and potential obstruction effects, aiming to select the most suitable communication node.

[0021] The wireless communication decision system directs the spacecraft's antenna steering control system to automatically adjust the antenna direction based on the calculation results to align with the newly selected relay satellite.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the efficient telemetry data packetization module first parses the continuous control system data stream, filters and reorganizes key information to form streamlined data units, aiming to reduce the amount of data transmission; secondly, the reorganized data units are encapsulated into standardized data packets, each of which is equipped with a frame header, a frame trailer, and check code information; finally, a circular queue mechanism is used to manage data packets, and fixed-length data segments are extracted from the queue for telemetry framing according to transmission requirements.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the efficient telemetry data packetization module is used to perform at least one of the following:

[0024] Compress data before packetization to remove redundant information;

[0025] According to the different contents and processing methods of telemetry data, the wireless communication decision system is divided into multiple modules to distribute and process different data, including direct transmission data, route selection data, over-sampling data, and solution data. Different types of data are packaged separately and distributed according to channels.

[0026] Prioritize telemetry data according to its importance, reduce the length of critical data and increase the frequency of critical data, increase the length of non-critical data and reduce the frequency of non-critical data;

[0027] The correctness of the data is ensured through single-packet verification and large-packet verification, while data parsing is assisted by downlink error correction coding.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the status monitoring and link transmission module is used to process and transmit internal and external data of the system, integrate and package various peripheral operating status information, angle solution data, and wireless communication decision system operating status data, and send them periodically through satellite links and ground-based links.

[0029] In a second aspect, a wireless communication decision system is provided, in which the wireless communication decision system as described in any one of the implementation methods of the first aspect is operated in the wireless communication decision system to monitor the operating status of the spacecraft and receive flight data, and to integrate and sub-package the data for telemetry transmission via satellite or ground-based means.

[0030] Compared with the prior art, the solution provided by this application includes at least the following beneficial technical effects:

[0031] (1) Improving the stability and continuity of the communication link: Through real-time optimization and adjustment of the spacecraft phased array antenna by precise control algorithms, the system can quickly adapt to the dynamically changing state of the spacecraft and the positional relationship of the relay satellite, and maintain a stable communication connection even in complex flight environments, reducing the risk of link interruption and ensuring the continuity and reliability of data transmission.

[0032] (2) Improving the system’s adaptive capabilities in dealing with complex environments: The introduction of a dynamic relay satellite switching module enables the communication system to autonomously select the best relay satellite based on real-time link quality and spacecraft trajectory. This intelligent decision-making process not only enhances the system’s ability to self-regulate in the face of emergencies, but also maximizes the utilization efficiency of communication resources, ensuring the robustness of the communication link in the face of various challenges and the smooth progress of the mission.

[0033] (3) Optimize data processing and transmission efficiency and save bandwidth resources: The efficient telemetry data packetization module effectively compresses the data volume and reduces the demand for wireless link bandwidth by intelligently screening and reorganizing key telemetry information and adopting efficient data encapsulation technology. Combined with the circular queue cache mechanism, it not only improves the speed of data processing and transmission, but also optimizes the utilization of storage resources, freeing up valuable communication resources for other key operations on the spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of wireless communication system architecture.

[0035] Figure 2 Schematic diagram of wireless communication decision system. DETAILED DESCRIPTION

[0036] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Figure 1 The present invention provides a wireless communication decision system, which runs on Figure 1 The wireless communication system architecture shown in Figure 1. The main function of the wireless communication decision system is to monitor the operating status of the spacecraft and receive flight data, and to integrate and package the data for telemetry transmission via satellite or ground-based methods. During the flight, the wireless communication decision system formulates a satellite communication link control strategy in real time based on the monitored spacecraft status to select communication satellites or control satellite communication equipment for communication. The wireless communication decision system is in the critical path of antenna angle control in the wireless communication system architecture and has high real-time performance.

[0038] like Figure 2 As shown in the figure, the wireless communication decision system includes six core modules, namely, system initialization module, multi-source data receiving module, precise control algorithm module, dynamic relay satellite switching module, efficient telemetry data packetization module and status monitoring and link transmission module.

[0039] (1) System initialization module: This module is responsible for basic configuration of the system kernel, including but not limited to configuring the system clock frequency, configuring the communication interface protocol (such as 1553B, 422 serial port, etc.) to ensure high-speed data exchange, and initializing key global variables, laying the foundation for the smooth operation of subsequent modules.

[0040] (2) Multi-source data receiving module: This module adopts a high-throughput data processing architecture. It can quickly capture the control system data stream through the bus interface and safely receive ground commands and status feedback data of various external devices through the serial communication interface. It also integrates digital input and output (DI / DO) and analog signal acquisition (AD / DA) functions to achieve real-time monitoring and integration of various switch quantities and voltage signals, providing the system with comprehensive environmental perception capabilities.

[0041] (3) Precision control algorithm module: Based on the real-time attitude and orbital parameters of the spacecraft and the position information of the relay satellite, this module uses precise mathematical models and algorithms to quickly calculate the optimal conversion angle of the phased array antenna relative to the target relay satellite, ensuring the continuity and stability of the communication link.

[0042] The precise control algorithm module first acquires and establishes the attitude parameters of the spacecraft and the real-time position information of the relay satellite through integrated data acquisition and initialization steps, and then performs relative attitude calculations. On this basis, the algorithm compares the actual antenna angle with the ideal azimuth, clarifies the pitch and yaw deviations, and applies precise control strategies to calculate the precise instructions for antenna adjustment in real time based on the deviation values, and transmits them to the antenna drive system to perform angle adjustment. At the same time, the system implements closed-loop feedback control, collects new attitude data in real time to evaluate the adjustment effect until the predetermined azimuth accuracy standard is reached, thereby ensuring the phased array antenna's stable and precise tracking of the relay satellite throughout the flight segment, and ensuring the efficiency and reliability of the satellite communication link.

[0043] Compared with the traditional pointing algorithm implementation, this system achieves parallel calculation and effective resource utilization through pointing algorithm timing scheduling and calculation path planning optimization under the condition of limited serial processor computing power. The entire algorithm execution process is roughly divided into several major steps: spacecraft control parameter reception and processing, target satellite status analysis, coordinate system conversion, attitude solution, pointing angle solution and pointing angle check and antenna status recovery. Serial execution of the above steps is difficult to meet the needs of rapid change of pointing angle under high-speed operation of spacecraft. The following methods are used to realize dynamic planning of algorithm steps, realize "rolling" process, reduce resource idleness, and shorten the calculation cycle. The main methods include:

[0044] a. Path decomposition and stage target caching: Decompose the complex algorithm execution path into several steps, cache the intermediate calculation results for each step, and dynamically call the calculation results of a single step while the algorithm input continues to scroll, reducing the waiting time of a single step;

[0045] b. Optimization of overlapping sub-problems: The pointing of the spacecraft relative to the satellite varies according to the frequency of changes in the spacecraft's position and speed. The algorithm dynamically evaluates the attitude adjustment results. For periodic and repetitive pointing tasks, the stage target cache is reused to reduce repeated calculation time.

[0046] (4) Dynamic relay satellite switching module: This module performs real-time analysis on the preset switching conditions. It can automatically perform relay satellite switching operations at the most appropriate time, effectively avoiding link interruption and enhancing the robustness of the communication system.

[0047] The wireless communication decision system is based on the spacecraft's real-time position information, speed, flight altitude and other dynamic parameters, as well as the performance indicators of the current communication link, such as signal strength, transmission delay and error rate. It autonomously monitors whether the current parameters exceed the preset operation threshold and determines whether there is a risk of link degradation or imminent communication interruption. When the monitoring data shows that the existing communication link no longer meets the mission requirements, based on the current spacecraft's flight trajectory and the real-time position information of the relay satellite network, the candidate relay satellite with the best relative position to the spacecraft and the highest expected communication quality is quickly calculated. The calculation process comprehensively considers the satellite's accessibility, signal coverage capability and potential obstruction effects, aiming to select the most suitable communication node. Subsequently, the wireless communication decision system directs the spacecraft's antenna steering control system to automatically adjust the antenna direction according to the calculation results and accurately align it with the newly selected relay satellite. The satellite switching method used in this system is soft switching. Compared with the traditional hard switching method, although the efficiency is reduced, it maintains the connection with the current satellite and the dynamic switching condition judgment, which can achieve seamless switching of satellites and reduce the possibility of telemetry data blanks.

[0048] (5) Efficient telemetry data packetization module: In view of the bandwidth limitation of the wireless link, this module intelligently screens and reorganizes the key information of the control system to form a compact data packet, and uses a circular queue cache mechanism to optimize storage and scheduling to ensure efficient transmission and storage of data.

[0049] This module first parses the continuous control system data stream, filters and reorganizes key information to form streamlined data units, aiming to reduce the amount of data transmission; secondly, the reorganized data units are encapsulated into standardized data packets, each of which is equipped with necessary frame headers, frame trailers, checksums and other information to ensure data integrity and order; finally, a circular queue mechanism is used to manage data packets, and fixed-length data segments are extracted from the queue for telemetry framing according to transmission requirements. This strategy effectively utilizes cache resources, simplifies pre-transmission preparations, and ensures the continuity of data flow and system response speed. Traditional packetization strategies have certain limitations, because packetization means the incompleteness of single-packet data, especially in intersatellite wireless transmission links, which are affected by spacecraft status and environmental interference, and have a high probability of packet loss. It is very likely that the loss or error of a single packet will cause the data of the entire data packet to be abnormal or unable to be parsed. This system alleviates this problem through the following methods:

[0050] a. Data compression and redundancy removal: compress data before packetization to optimize redundant information and reduce data size while ensuring data accuracy;

[0051] b. Parallel transmission and pseudo-distributed processing: According to the different contents and processing methods of telemetry data, the wireless communication decision system distributes and processes different data in multiple modules, such as direct transmission data, route selection data, over-sampling data, and solution data. Different types of data are packaged separately and distributed according to channels. While improving the processing and transmission efficiency, it ensures that different types of data do not affect each other and improves the integrity of data packets;

[0052] c. Priority-based data scheduling mechanism: prioritize telemetry data according to their importance, reduce the length of critical data, increase the frequency of critical data, and vice versa for non-critical data;

[0053] d. Error checking and error correction coding: Single packet checking and large packet checking are used to ensure data correctness, while downlink error correction coding is used to assist data parsing.

[0054] (6) Status monitoring and link transmission module: This module is responsible for the comprehensive processing and reliable transmission of internal and external data of the system. It integrates and packages various peripheral operating status information, angle solution data, software operating status data, and other data, and periodically sends them through satellite links and ground-based links. It takes into account the reasonable use of data update frequency and link bandwidth, and provides the ground technical team with a real-time and comprehensive system view.

[0055] Although the present invention is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A wireless communication decision-making system for multi-task complex environments, characterized in that: It includes system initialization module, multi-source data receiving module, precise control algorithm module, dynamic relay satellite switching module, efficient telemetry data subpackaging module and status monitoring and link transmission module; The system initialization module is used to perform basic configuration of the system kernel; The multi-source data receiving module is used to receive ground commands and status feedback data of various external devices, as well as real-time monitoring and integration of various switch quantities and voltage signals; The precise control algorithm module is used to calculate the optimal conversion angle of the phased array antenna relative to the target relay satellite based on the real-time attitude and orbital parameters of the spacecraft and the position information of the relay satellite; The dynamic relay satellite switching module is used to automatically perform the relay satellite switching operation by analyzing the preset satellite switching conditions in real time and determining the timing; The efficient telemetry data packetization module forms data packets by intelligently filtering and reorganizing the information of the control system, and uses the circular queue cache mechanism for storage and scheduling.

2. The wireless communication decision system according to claim 1, characterized in that: The basic configuration performed by the system initialization module includes: system clock frequency, configuring communication interface protocol, and initializing key global variables.

3. The wireless communication decision system according to claim 1, characterized in that: The multi-source data receiving module adopts a high-throughput data processing architecture, captures the control system data stream through the bus interface, and uses the serial communication interface to safely receive ground commands and status feedback data of various external devices. It also integrates digital input and output DI / DO and analog signal acquisition AD / DA functions to achieve real-time monitoring and integration of various switch quantities and voltage signals.

4. The wireless communication decision system according to claim 1, characterized in that: The precise control algorithm module first acquires and establishes the attitude parameters of the spacecraft and the real-time position information of the relay satellite through integrated data acquisition and initialization steps, and then performs relative attitude calculation; on this basis, the actual antenna angle is compared with the ideal azimuth, the pitch and yaw deviations are clarified, and the precise instructions for antenna adjustment are calculated in real time based on the deviation values, and transmitted to the antenna drive system to execute angle adjustment; at the same time, the system implements closed-loop feedback control, and collects new attitude data in real time to evaluate the adjustment effect until the predetermined azimuth accuracy standard is reached.

5. The wireless communication decision system according to claim 4, characterized in that: The precise control algorithm module is used to execute the pointing algorithm timing scheduling and calculation path planning optimization, and the execution process includes: Path decomposition and stage target caching: Decompose the algorithm execution path into several steps, cache the intermediate calculation results for each step, and dynamically call the calculation results of a single step while the algorithm input continues to scroll, reducing the waiting time of a single step; Optimization of overlapping subproblems: The pointing of the spacecraft relative to the satellite varies according to the frequency of the spacecraft position and speed changes. The algorithm dynamically evaluates the attitude adjustment results. For periodic and repetitive pointing tasks, the stage target cache is reused to reduce repeated calculation time.

6. The wireless communication decision system according to claim 1, characterized in that: The dynamic parameters based on the real-time position information, speed, and flight altitude of the spacecraft, as well as the performance indicators of the current communication link, including signal strength, transmission delay, and error rate, autonomously monitor whether the current parameters exceed the preset operation threshold, and determine whether there is a risk of link degradation or imminent communication interruption; When monitoring data indicates that the existing communication link no longer meets the mission requirements, the candidate relay satellite with the best relative position to the spacecraft and the highest expected communication quality is quickly calculated based on the current flight trajectory of the spacecraft and the real-time position information of the relay satellite network; The calculation process comprehensively considers the satellite's accessibility, signal coverage and potential obstruction effects, aiming to select the most suitable communication node; The wireless communication decision system directs the spacecraft's antenna steering control system to automatically adjust the antenna direction based on the calculation results to align with the newly selected relay satellite.

7. The wireless communication decision system according to claim 1, characterized in that: The efficient telemetry data packetization module first parses the continuous control system data stream, filters and reorganizes key information to form streamlined data units, aiming to reduce the amount of data transmission; secondly, the reorganized data units are encapsulated into standardized data packets, each of which is equipped with a frame header, a frame trailer, and a check code information; finally, a circular queue mechanism is used to manage data packets, and fixed-length data segments are extracted from the queue for telemetry framing according to transmission requirements.

8. The wireless communication decision system according to claim 7, characterized in that: The efficient telemetry data packetization module is used to perform at least one of the following: Compress data before packetization to remove redundant information; According to the different contents and processing methods of telemetry data, the wireless communication decision system is divided into multiple modules to distribute and process different data, including direct transmission data, route selection data, over-sampling data, and solution data. Different types of data are packaged separately and distributed according to channels. Prioritize telemetry data according to its importance, reduce the length of critical data and increase the frequency of critical data, increase the length of non-critical data and reduce the frequency of non-critical data; The correctness of the data is ensured through single-packet verification and large-packet verification, while data parsing is assisted by downlink error correction coding.

9. The wireless communication decision system according to claim 1, characterized in that: The status monitoring and link transmission module is used to process and transmit the internal and external data of the system, integrate and package various peripheral operation status information, angle solution data and wireless communication decision system operation status data, and send them periodically through satellite links and ground-based links.

10. A wireless communication decision system, characterized in that: The wireless communication decision system as claimed in any one of claims 1 to 9 operates in the wireless communication decision system to monitor the operating status of the spacecraft and receive flight data, and to integrate and sub-package the data for telemetry transmission via satellite or ground-based means.

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