Rapid spaceflight measurement and control communication ground station task preparation method

Abstract

The invention discloses a spaceflight measurement and control communication ground station task quick preparation method, which comprises the following steps that: when multiple tasks are executed in parallel, a station-level monitoring system newly establishes a plurality of threads for independent execution, the resources among the threads are independent and do not influence each other, and the resources are distributed by adopting a thread synchronous mutual exclusion mode; when a single task is executed, the interaction level is reduced based on a flat management and control architecture, a baseband program is loaded in a local caching + parallel loading mode, and task parameters are issued in a parallel parameter control + centralized confirmation mode. According to the multi-task parallel execution method, different types of tasks are decoupled through multi-task parallel execution, it is guaranteed that mutual coupling and waiting do not exist during multi-task execution, and the degree of parallelism of the multiple tasks is improved. When a single task is executed, a plurality of processes such as program loading, task parameter configuration and communication parameter configuration are modified into parallel execution, so that the parallelism of a single process is improved, and the task preparation time of the single process is greatly shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace TT&C (Tracking, Telemetry and Command) communication, and particularly to a method for quickly preparing tasks of an aerospace TT&C communication ground station. Background Art

[0002] Aerospace TT&C communication refers to tracking and orbit determination of spacecraft (i.e., external measurement), telemetry (i.e., internal measurement), remote control, and communication (transmitting data, images, voice, etc.). The aerospace TT&C communication system is the lifeline for the connection between spacecraft and the ground and the transmission line for space-earth information, and is also an important part of aerospace engineering and space infrastructure. The frequency band of TT&C communication is still mainly based on radio frequency, and optical measurement and communication are gradually being applied; the coverage range of TT&C communication extends from the over-the-horizon area of land (sea) base stations to the near-earth space basically covered by the space-based network, and from the moon to deep space.

[0003] With the rapid development of China's aerospace technology, the task pressure of aerospace TT&C communication ground stations is increasing, and the bottleneck is becoming more and more obvious. With the increasing construction scale, aerospace TT&C communication ground stations show characteristics such as integration, multi-target service capabilities, and rapid task response, and there is an urgent need to improve the utilization rate of ground TT&C communication resources.

[0004] At the management and control level, the aerospace TT&C communication ground station mainly consists of three levels: a centralized monitoring system, a station-level monitoring system, and an equipment monitoring system. The centralized monitoring system is responsible for centralized management and scheduling of multiple stations, the station-level monitoring system is responsible for resource allocation, equipment management, and task control of the equipment of this station, and the equipment monitoring system completes the management and control of a certain equipment.

[0005] The aerospace TT&C communication ground station consists of multiple subsystems, including antenna servo subsystem, transmitting subsystem, high-frequency receiving subsystem, baseband subsystem, monitoring subsystem, data storage subsystem, time-frequency subsystem, test and calibration subsystem, etc.

[0006] The main work in the task preparation stage is the connection of task equipment, the setting of working parameters of each equipment, and the transmission of data files. In the task preparation stage, attention should be paid to the correctness of parameter control of each equipment and the reduction of the time used for equipment parameter control as much as possible.

[0007] The device parameters related to the task are stored in the database in the form of parameter macros and associated with the corresponding task scripts. The same task may involve multiple different devices of one or more ground stations. To reduce the system task switching time, the device parameter control is set according to the ground station. The device parameter control is completed by each station-level monitoring system. The parameter control of different devices is carried out independently and there is no dependence on the control timing between them. The parameter control and parameter check of the same device are carried out asynchronously to ensure the parallel execution of the device parameter control. To ensure the reliable control of the device parameters, it is necessary to consider the device parameter control strategy, including the processing strategies such as retransmission of control commands or parameters in case of errors and timeout of control command responses.

[0008] In the task preparation stage, the centralized monitoring system forwards the command to the corresponding station-level monitoring system for execution according to the parameters in the command. After the station-level monitoring system finishes the execution, it reports the execution result to the centralized monitoring system. The station-level monitoring system issues device control commands to the device monitoring system according to the task scheduling commands issued by the centralized monitoring system and the relevant task scripts; receives the control results reported by the device monitoring system and reports the task preparation results to the centralized monitoring system. During the task execution process, if a device fails, the station-level monitoring system needs to handle the failure according to the failure handling plan. The device monitoring system completes the internal parameter control and execution of the device according to the task parameters controlled by the station-level monitoring system and reports the control result to the station-level monitoring system after the execution is completed.

[0009] The number of targets supported by the space TT&C communication ground station is increasing, and the current solution cannot effectively solve the problem of high parallel operation of multi-target indicators. With the increase in the number of targets, the processing time of a single target is getting longer, resulting in the continuous extension of the task preparation time, which reduces the timeliness and efficiency of the ground station service.

[0010] Due to the increasing comprehensive service ability of the space TT&C communication ground station, high scalability has been considered in the system design from the beginning. As Figure 1 shown, in order to achieve high scalability, software at levels such as baseband device monitoring, platform management and control, and function management and control has been added to the current solution, resulting in more levels and less flatness. Eventually, the management efficiency of the ground station has decreased to a certain extent.

[0011] Step-by-step control and confirmation of the device: When the station-level monitoring system executes the single-task device control, it controls the device parameters step by step in a serial manner. After the control is completed, it confirms the device control result through the device status report. The device status report is sent once per second, so the above process of step-by-step multiple control of the device and status confirmation takes a long time.

[0012] Hierarchical resource management and allocation: The station-level monitoring system sends a resource application to the baseband equipment monitoring system according to the task requirements. The baseband equipment monitoring system interacts with the platform control software to control the function control function algorithm software to complete the program loading. The baseband resource allocation is completed through the interaction of the station-level monitoring system, the baseband equipment monitoring system, and the platform control software. The allocation levels are numerous, and the time consumption is relatively long. Summary of the Invention

[0013] To solve the above problems, the present invention proposes a method for quickly preparing tasks for a space TT&C communication ground station, which not only improves the task response time of the space TT&C communication ground station, but also improves the service efficiency of the ground station and the equipment utilization rate.

[0014] The technical solution adopted by the present invention is as follows:

[0015] A method for quickly preparing tasks for a space TT&C communication ground station, including:

[0016] When multiple tasks are executed in parallel, the station-level monitoring system creates multiple independent threads for execution. The resources between the threads are independent and do not affect each other, and the resources are allocated in a thread synchronization and mutual exclusion manner;

[0017] When a single task is executed, based on a flattened control architecture, the interaction level is reduced, the baseband program is loaded through a local cache + parallel loading method, and the task parameters are sent down through a parallel parameter control + centralized confirmation method.

[0018] Further, the workflow of the parallel execution of multiple tasks includes:

[0019] The centralized monitoring system creates a thread to separately process the task preparation command. The station-level monitoring system creates a thread to execute the task preparation command. After the task preparation command is executed, the task preparation result is reported to the centralized monitoring system;

[0020] When the centralized monitoring system starts a new task preparation, a new thread is re-created to execute the new task preparation command, and the two threads execute the task preparation command in parallel.

[0021] Further, when the station-level monitoring system receives the task preparation command, it creates a thread to execute the script, and considers the control of shared devices during the parallel execution of multiple tasks, so that the new task does not affect the tasks being executed; after the thread execution script is completed, the centralized monitoring system and the station-level monitoring system release the thread resources.

[0022] Further, the workflow of the single task execution includes:

[0023] The centralized monitoring system sends a task preparation command to the station-level monitoring system;

[0024] The station-level monitoring system allocates resources according to the task requirements in the task preparation command;

[0025] The station-level monitoring system executes relevant controls and deployments in parallel according to the resource allocation results, including communication parameter control, program dynamic deployment, and task parameter control;

[0026] The station-level monitoring system conducts status checks and reports the task preparation results to the centralized monitoring system.

[0027] Further, the communication parameter control includes: the station-level monitoring system reports the resource allocation results to the centralized monitoring system, the centralized monitoring system generates communication parameters and issues them to the station-level monitoring system, and the station-level monitoring system controls the digital transmission baseband to complete the establishment of communication ports.

[0028] Further, the program dynamic deployment includes: the station-level monitoring system issues a startup program loading command to the baseband device, and the baseband device completes program loading according to the program version.

[0029] Further, the task parameter control includes: the station-level monitoring system conducts task parameter control on the antenna servo subsystem, channel equipment, and baseband equipment according to the task requirements; after receiving the task parameter control, the antenna servo subsystem points the antenna according to the target orbit; after receiving the task parameters, the baseband equipment performs caching and automatically conducts control after the signal processing software deployment is completed.

[0030] Further, the flat control architecture includes a station-level monitoring system and baseband boards, where the station-level monitoring system communicates directly with the baseband boards and directly manages and controls the resources of the baseband boards; the baseband boards are deployed with baseband monitoring software to complete device-level control during device sub-control.

[0031] Further, the station-level monitoring system is configured to complete the resource management of relevant devices, including the resource management of baseband boards, up / down converters, and power amplifiers; the station-level monitoring system conducts dynamic resource allocation according to task needs in combination with the resource capabilities and usage status of the devices.

[0032] Further, when the station-level monitoring system executes the task process, it adopts a parallel control method for all devices. After the device control is completed, the station-level monitoring system conducts a unified inspection to confirm the device status. If the control is in place, it executes subsequent operations; otherwise, it executes the exception handling process.

[0033] The beneficial effects of the present invention are as follows:

[0034] The present invention can greatly shorten the mission preparation time of the space TT&C communication ground station, not only improving the mission response time of the space TT&C communication ground station, but also enhancing the service efficiency of the ground station and the utilization rate of equipment. Through parallel execution of multiple tasks, different types of tasks are decoupled to ensure that there is no mutual coupling or waiting during the execution of multiple tasks, thereby improving the parallelism of multiple tasks. When executing a single task, by modifying multiple processes such as program loading, task parameter configuration, and communication parameter configuration to be executed in parallel, the parallelism of a single process is improved, and the mission preparation time of a single process is greatly shortened.

[0035] The present invention flattens the ground station management and designs the control software of the baseband equipment in a flattened manner, streamlining the baseband equipment control, platform control software, and function control software. The baseband board cards are directly managed by the station-level monitoring system, reducing the number of information interactions and communication time between multiple software, and improving the control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a diagram of the existing space TT&C communication ground station management architecture.

[0037] Figure 2 is a flowchart of the parallel execution of multiple tasks in an embodiment of the present invention.

[0038] Figure 3 is a flowchart of the execution of a single task in an embodiment of the present invention.

[0039] Figure 4 is a schematic diagram of the dynamic loading of the baseband function software in an embodiment of the present invention.

[0040] Figure 5 is a flowchart of the device parameter distribution and confirmation in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will be described below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. That is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0042] This embodiment provides a method for quickly preparing the mission of a space TT&C communication ground station, including:

[0043] When multiple tasks are executed in parallel, multiple threads are newly created by the station-level monitoring system to execute independently. The resources between the threads are independent and do not affect each other, and the resources are allocated in a thread synchronization and mutual exclusion manner;

[0044] When performing single-task execution, the interaction level is reduced based on the flattened management and control architecture. The baseband program is loaded through the local cache + parallel loading method, and the task parameters are issued through the parallel parameter control + centralized confirmation method.

[0045] It should be noted that multi-task parallel execution includes parallelism between different types of tasks, parallelism of the same type of tasks, and parallelism of multiple data streams in the same task. When performing multi-task parallelism, task conflict checks need to be carried out. As long as the task resources do not conflict, these tasks can be considered non-conflicting and can be executed in parallel. When multiple tasks are executed concurrently, the station-level monitoring system creates multiple independent threads for execution. The resources between the threads are independent and do not affect each other. When allocating execution resources, a thread synchronization and mutual exclusion scheme is adopted to ensure that the resource allocation does not conflict and is not re-allocated.

[0046] Since the task preparation of the space TT&C communication ground station is a complex process, involving frequent information processing and interaction between three layers of monitoring, it is necessary to solve the problems of low management efficiency and long interaction time caused by complex information processing and interaction. Based on this, in this embodiment, the interaction level is reduced through the flattened management and control architecture to improve the information interaction efficiency; through a low-complexity, high-parallel allocation algorithm, the rapid allocation of resources is achieved; through the local cache + parallel loading method, the rapid loading of the baseband program is realized; through the parallel parameter control + centralized confirmation method, the rapid issuance of task parameters is realized.

[0047] As Figure 2 shown, the multi-task parallel execution workflow of this embodiment includes:

[0048] a) The centralized monitoring system creates a new thread to separately process the task preparation command;

[0049] b) The station-level monitoring system creates a new thread to execute this task;

[0050] c) After the task execution of the station-level monitoring system is completed, it reports the task preparation result to the centralized monitoring system;

[0051] d) When the centralized monitoring system starts a new task preparation, a new thread is re-created to execute this task, and these two threads execute the task preparation command in parallel;

[0052] e) When the station-level monitoring system receives the task preparation command, it creates a new thread to execute the script. In multi-task parallel execution, the control of shared devices needs to be considered, and it is necessary to ensure that the new task does not affect the tasks being executed;

[0053] f) After the script execution is completed, the centralized monitoring system and the station-level monitoring system release the thread resources.

[0054] As Figure 3 shown, the single-task execution workflow of this embodiment includes:

[0055] a) The centralized monitoring system issues a task preparation command to the station-level monitoring system;

[0056] b) The station-level monitoring system allocates resources according to the task requirements in the task preparation command;

[0057] c) The station-level monitoring system executes relevant controls and deployments in parallel according to the resource allocation results, including communication parameter control, program dynamic deployment, and task parameter control;

[0058] d) The station-level monitoring system conducts a status check and reports the task preparation result to the centralized monitoring system.

[0059] Preferably, the communication parameter control includes: the station-level monitoring system reports the resource allocation result to the centralized monitoring system, the centralized monitoring system generates communication parameters and issues them to the station-level monitoring system, and the station-level monitoring system controls the digital transmission baseband to complete the establishment of communication ports.

[0060] Preferably, the program dynamic deployment includes: the station-level monitoring system issues a start program loading command to the baseband device, and the baseband device completes the program loading according to the program version.

[0061] Preferably, the task parameter control includes: the station-level monitoring system conducts task parameter control on the antenna servo subsystem, channel equipment, and baseband equipment according to the task requirements; after receiving the task parameter control, the antenna servo subsystem completes the antenna pointing according to the target orbit; after receiving the task parameters, the baseband device performs caching and automatically conducts control after the signal processing software deployment is completed.

[0062] In order to improve the task preparation response speed, it is necessary to reduce the number of information interactions and transmissions. Therefore, a flattened management and control architecture can be adopted to reduce the interaction frequency. Preferably, the flattened management and control architecture of this embodiment mainly involves direct communication between the station-level monitoring system and the baseband board cards, directly managing and controlling the board card resources, eliminating the intermediate links in the process, and improving the system operation efficiency. At the same time, in order to ensure the continuity of operations and the convenience of control, the baseband monitoring software is deployed in parallel to complete device-level control during device sub-control.

[0063] After the baseband board cards are directly incorporated into the station-level monitoring system, the station-level monitoring system directly completes the management of all device resources, including baseband board cards, up / down converters, power amplifiers, etc. The station-level monitoring system needs to conduct dynamic allocation according to the task requirements in combination with the device resource capabilities and usage status.

[0064] Due to the complex types of space TT&C communication tasks, different resource requirements, and a large number of equipment types, it is necessary to support parallel allocation and low-complexity allocation strategies to shorten the task preparation time. The low-complexity allocation strategies include task residency, parameter switching, occupancy / idle + resource health, historical deployment query, etc. When designing the software, an open architecture is adopted to support seamless addition of new allocation strategies in the future.

[0065] Since the baseband equipment supports flexible combination of multi-users, multi-rates, and multi-functions, it is necessary to dynamically load the baseband function software during task preparation. In this embodiment, the method of remote warehouse + local cache is adopted to balance the centralized and convenient management and distributed fast download of the function software; the multi-board task parallel loading method is used to improve the algorithm loading speed.

[0066] As Figure 4 shown in the schematic diagram of dynamic loading of baseband function software, the algorithm warehouse is mainly responsible for software version management and provides the algorithm download function. DDR is configured in the signal processing board to cache the latest algorithm software to improve the loading speed. The board management software is used to pull the program from the algorithm warehouse to update the software version in DDR and support loading the algorithm into corresponding chips such as DSP and FPGA.

[0067] As Figure 5 shown, the task process of the station-level monitoring system involves control of equipment such as antenna servo equipment, channel equipment, baseband equipment, equalization amplifiers, etc., radio frequency switches, up / down matrix control, etc. All equipment adopts a parallel control method. After the equipment control is completed, the station-level monitoring system conducts a unified inspection to confirm the equipment status. If the control is in place, subsequent operations are executed; if the control is not in place, abnormal handling processes such as command retransmission are executed. By the above method, the interaction waiting time is reduced and the command execution time is shortened.

[0068] It should be noted that for the foregoing method embodiments, for the sake of simplicity of description, they are expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

Claims

1. A method for rapid preparation of a space measurement and control communication ground station mission, characterized in that: include: When multiple tasks are executed in parallel, multiple threads are created through the station-level monitoring system to execute independently. The resources between threads are independent and do not affect each other, and resources are allocated in a thread synchronization and mutual exclusion manner. When a single task is executed, the interaction level is reduced based on the flat management and control architecture, the baseband program is loaded through local cache + parallel loading, and the task parameters are issued through parallel parameter control + centralized confirmation.

2. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 1, characterized in that: The workflow of the multi-task parallel execution includes: The centralized monitoring system creates a new thread to independently process the task preparation command, and the station-level monitoring system creates a new thread to execute the task preparation command. After the task preparation command is executed, the task preparation result is reported to the centralized monitoring system; When the centralized monitoring system starts preparing a new task, a new thread is created to execute the new task preparation command, and two threads execute the task preparation command in parallel.

3. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 2, characterized in that: When the station-level monitoring system receives the task preparation command, it creates a new thread to execute the script and considers the control of shared equipment in the parallel execution of multiple tasks, so that the new task does not affect the tasks being executed; After the thread execution script is executed, the centralized monitoring system and the station-level monitoring system release the thread resources.

4. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 1, characterized in that: The workflow of the single task execution includes: The centralized monitoring system sends task preparation commands to the station-level monitoring system; The station-level monitoring system allocates resources according to the task requirements in the mission preparation order; The station-level monitoring system performs related control and deployment in parallel according to the resource allocation results, including communication parameter control, program dynamic deployment and task parameter control; The station-level monitoring system performs status checks and reports task preparation results to the centralized monitoring system.

5. A method for rapid preparation of aerospace measurement and control communication ground station mission according to claim 4, characterized in that: The communication parameter control includes: the station-level monitoring system reports the resource allocation result to the centralized monitoring system, the centralized monitoring system generates communication parameters and sends them to the station-level monitoring system, and the station-level monitoring system controls the data transmission baseband to complete the establishment of the communication port.

6. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 4, characterized in that: The program dynamic deployment includes: the station-level monitoring system sends a start program loading command to the baseband device, and the baseband device completes the program loading according to the program version.

7. A method for rapid preparation of a space telemetry and communication ground station mission according to claim 4, characterized in that: The mission parameter control includes: the station-level monitoring system controls the mission parameters to the servo-antenna feed system, channel equipment and baseband equipment according to the mission requirements; after the servo-antenna feed system receives the mission parameter control, it completes the antenna pointing according to the target orbit; after the baseband equipment receives the mission parameters, it caches them and automatically controls them after the signal processing software is deployed.

8. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 1, characterized in that: The flat management and control architecture includes a station-level monitoring system and a baseband board, wherein the station-level monitoring system communicates directly with the baseband board to directly manage and control the baseband board resources; the baseband board is deployed with baseband monitoring software to complete device-level control when the equipment is sub-controlled.

9. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 1, characterized in that: The station-level monitoring system is configured to complete resource management of related equipment, including resource management of baseband boards, up / down converters, and power amplifiers; the station-level monitoring system dynamically allocates resources based on task requirements and in combination with equipment resource capabilities and usage status.

10. The method for rapid preparation of a space telemetry and communication ground station mission according to claim 1, characterized in that: When the station-level monitoring system executes the task process, it adopts parallel control method for all equipment. After the equipment control is completed, the station-level monitoring system conducts a unified inspection to confirm the equipment status. If the control is in place, subsequent operations are executed, otherwise the abnormal handling process is executed.

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