Inter-satellite link mesh routing system based on CCSDS specification

Abstract

The invention discloses an inter-satellite link mesh routing system based on a CCSDS specification. A data bus adopts a full mesh topology structure and comprises a bus control node, an AOS coding node, an inter-satellite link processing node, a measurement and control bus and a data bus, wherein the bus control node is used for completing on-orbit uploading updating of parameter configuration, collecting health telemetering of other nodes and diagnosing health conditions of the other nodes; the AOS coding node is used for framing and coding service data generated by the satellite according to a CCSDS specification; the inter-satellite link processing node is used for completing forward link base band receiving processing, backward link base band sending processing, satellite user data analysis and parameter configuration and health management of the node; the measurement and control bus adopts a bus type topology to complete measurement and control information connection of the bus control node and all terminals; and the data bus adopts a full mesh topology to complete data connection among all terminals.

Description

technical field [0001] The invention relates to the technical field of inter-satellite link routing, in particular to an inter-satellite link mesh routing system based on the CCSDS specification. Background technique [0002] With the development of aerospace technology, space missions are becoming more and more complex, and the demand for satellite networking and interconnection is increasing. The current space-based network mostly draws on the mature TCP / IP network standard on the ground. The TCP / IP protocol cluster has high requirements for network stability and connectivity; and due to the sparseness of satellites, high mobility, and limited communication range, often There is no continuous, stable, end-to-end path. In addition, the inter-satellite link also has the characteristics of high bit error, high delay and link bandwidth asymmetry, so TCP / IP is not suitable for inter-satellite Message transmission in the link. Information transmission generally adopts the CCSD...

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Problems solved by technology

In addition, the TCP / IP protocol has a large overhead, which greatly wastes the precious bandwidth resources of the inter-satellite link

Moreover, most of the satellite networks are small and sparse networks, and the advantages of implementing the TCP / IP protocol in the satellite system are insufficient.

[0003]On the other hand, satellite communication generally adopts an end-to-end method, and the communication service priority relationship, communication distance, and codec method of each inter-satellite link connected object They are not exactly the same, and the star topology is easy to form a heavy burden on the central router, forming a bottleneck

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