Improved small satellite data transmission subsystem bus dispatching system

A technology of satellite data transmission and dispatching system, which is applied in the direction of digital transmission system, transmission system, radio transmission system, etc. It can solve the problems of unset response and retransmission mechanism, increase telemetry loss and repetition, etc., and achieve good scalability, The effect of increasing the success rate

CN109194555AActive Publication Date: 2019-01-11AEROSPACE DONGFANGHONG SATELLITE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-11

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Abstract

The present invention provides an improved small satellite data transmission subsystem bus dispatching system, and relates to the field of small satellite data transmission subsystem bus dispatching.The system comprises a data transmission control unit and n lower level devices, wherein the data transmission control unit comprises a main program module, an upper-level bus triggering interruptionmodule and a lower-level bus triggering interruption module; the upper-level bus triggering interrupting module comprises an upper-level processing return starting module and a processing response forwarding module; each lower level device comprises one device return starting module and one device response module; and the main program module comprises a retransmission module and a framing packingmodule. The improved small satellite data transmission subsystem bus dispatching system employs event triggering to replace the internal timer triggering to solve the phenomena of loss and repeating of telemetering frames caused by each independent clock and achieve common clock of a multi-level bus; response and re-transmission mechanisms are added to improve the success rate, the robustness andreliability of the communication; and moreover, the improved small satellite data transmission subsystem bus dispatching system has good expansibility, can be used for design of the satellite data transmission subsystem and can support the multi-bus design of the distributed system.
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Description

technical field

[0001] The invention relates to the field of bus dispatching of a small satellite data transmission subsystem, in particular to an improved bus dispatching system of a small satellite data transmission subsystem. Background technique

[0002] The satellite data transmission subsystem is a subsystem that transmits remote sensing and telemetry data to the ground in real time or with a delay after being stored on the satellite through a radio frequency link according to the set data format. There are many equipments in this subsystem. At present, the equipment mainly involved in small satellite data transmission includes data transmission control unit, compression encoder, data processor, modulation transmitter, solid-state memory, servo controller, antenna and other equipment. The design of the system adopts the architecture of the distributed control system. The digital transmission control unit is the control center and the nerve center of internal and extern...

Examples

Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0032] In view of the phenomenon of occasional loss and repetition of telemetry caused by the bus scheduling mechanism of the existing small satellite data transmission subsystem, and the risk of missing execution of remote control commands, an improved bus scheduling method is provided to improve the robustness and reliability of system communication .

[0033] like figure 1 Shown is a schematic diagram of a small satellite data transmission system. It can be seen from the figure that an improved small satellite data transmission subsystem bus scheduling system includes a data transmission control unit and n subordinate devices; n is a positive integer greater than or equal to 2; among them, The data transmission control unit includes a main program module, an upper-level bus trigger interrupt module and a lower-level bus trigger interrupt mod...