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Time-trigger-based SpaceWire network communication method

A network communication and time-triggered technology, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems that cannot meet the requirements of real-time and certainty, and the delay of information transmission cannot be determined, so as to achieve real-time and Deterministic guarantees, effects of avoiding competing uses

Active Publication Date: 2012-08-01
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology

[0004] The above-mentioned SpaceWire high-level application protocols are all based on the ECSS-E-ST-50-12C standard specification based on the "event-triggered" communication protocol, and the spaceborne SpaceWire network established by using the information communication method is a multi-source, asynchronous communication network , its disadvantage is that the competition of communication nodes for network resources leads to the uncertainty of information transmission delay, and it cannot meet the real-time and deterministic requirements of important information such as on-board control for data transmission.

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  • Time-trigger-based SpaceWire network communication method
  • Time-trigger-based SpaceWire network communication method
  • Time-trigger-based SpaceWire network communication method

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Embodiment Construction

[0029] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown is flow chart of the present invention, and concrete process is as follows:

[0031] 1. Organize the data to be sent into data packets

[0032] The present invention is based on the ECSS-E-ST-50-12C standard specification of the SpaceWire bus, and carries out the data packet format agreement of communication between network nodes, specifically as follows:

[0033] 1) Divide the "destination address" domain (destination address) of the SpaceWire packet in the ECSS-E-ST-50-12C standard specification into two parts: the first n address identifiers constitute the path address from the source node to the destination node (n is equal to the number of routers on the specified path); the n+1th address identifier is the logical address of the destination node.

[0034] 2) Divide the "package data" domain (cargo) of the SpaceWire packet in the E...

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Abstract

The invention discloses a time-trigger-based SpaceWire network communication method which comprises the following steps of: performing packet packaging on to-be-sent data; confirming a bandwidth between a sending node and a receiving node and a time window according to the size of the to-be-sent data; and performing status switching by each network node according to a received time code, thereby finishing data transmission. According to the method provided by the invention, the problems of timeliness and determinacy of data transmission in a satellite-based SpaceWire network are solved and the quality of service of the satellite-based SpaceWire network is increased.

Description

technical field [0001] The invention relates to a time-triggered SpaceWire network communication method. Background technique [0002] The SpaceWire bus is a new data bus standard for aerospace applications jointly developed by the European Space Agency (ESA) in conjunction with European space companies and academia. Due to the advantages of high speed, simplicity and flexibility, open protocol, and adaptability to harsh space environments, the SpaceWire bus has become a new generation of spaceborne data bus recommended by ESA and NASA, and has been successfully used in many international space missions. [0003] The SpaceWire bus protocol was drafted by the University of Dundee in the UK. It became the ECSS-E-50-12A standard "SpaceWire-Links, nodes, routers and networks" after being approved by the European Cooperation for Space Standardization (ECSS) in 2003. The standard was revised in 2008 For ECSS-E-ST-50-12C. Compared with the Open System Interconnection (OSI) refere...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/00H04L12/801
Inventor 杨志李国军刘思远谢松刘胜利
Owner AEROSPACE DONGFANGHONG SATELLITE
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