A spacefibre bus system with passive optical network structure

Abstract

The invention discloses a SpaceFibe bus system of a passive optical network structure. The system comprises a master control device and a plurality of slave devices which are connected through a passive optical splitter / combiner, wherein the master control device and the slave device are connected with a control protocol according to a SpaceFiberre multi-point connection; data conflict-free transmission is achieved in a time division multiplexing mode, and the SpaceFibre multi-point connection control protocol further comprises a connection ID identification frame, a connection request destruction frame and a connection confirmation destruction frame on the basis of a SpaceFibre standard protocol. The SpaceFiberre bus system solves the problems that in a centralized control type satellite-borne electronic system, the concurrent switching requirement is not obvious, and the SpaceFibere switch is large in size, high in power consumption, complex in reliability design and the like.

Description

technical field [0001] The invention belongs to the technical field of high-speed data transmission of spacecraft, and in particular relates to a SpaceFibre bus system with a passive optical network structure. Background technique [0002] With the development of aerospace technology, the tasks borne by spacecraft are becoming increasingly heavy, their functions are becoming more complex, and the types of equipment on board are gradually increasing. The amount of data that needs to be exchanged by each unit in the aerospace electronic system is increasing. In order to meet the needs of complex structure networking and massive data transmission of spacecraft electronic systems, the European Space Agency proposed the SpaceWire bus protocol in 2003, which is a high-speed, full-duplex, point-to-point serial data specially designed for aerospace applications. Transmission technology, the typical link rate is 200Mbps. Compared with the traditional data bus, its bandwidth has been...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a SpaceFibre bus system based on a passive optical network structure, aiming at the problems that the concurrent exchange requirement is not obvious in the centralized control spaceborne electronic system, and the SpaceFibre switch has large volume, high power consumption, and complicated reliability design. It uses a passive optical splitter / combiner to bundle the optical fibers in the SpaceFibre bus, each bus node shares the optical path, and uses time-division multiplexing to establish a data link in turn according to the SpaceFibre multi-point connection control protocol to complete data transmission

Images