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Method for constructing moment dispatch list suitable for SpaceWire network

A construction method and scheduling table technology, which is applied in the field of space-borne aviation communication, can solve problems such as the inability to guarantee the SpaceWire network, and achieve the effects of simple scheduling, guaranteed certainty, and guaranteed certainty

Active Publication Date: 2013-12-18
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing technology which only provides the method of deterministic data transmission in the end system, but cannot guarantee the whole SpaceWire network, especially the lack of real-time and deterministic routers, the present invention provides a time scheduling suitable for SpaceWire network table build method

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  • Method for constructing moment dispatch list suitable for SpaceWire network
  • Method for constructing moment dispatch list suitable for SpaceWire network
  • Method for constructing moment dispatch list suitable for SpaceWire network

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Embodiment

[0087] Combine below Figure 5 The end systems and routers listed in the examples further illustrate the present invention. Figure 5 The SpaceWire network shown contains 5 end systems and 2 routers. The E-end system is a large-capacity memory unit and also serves as a time master node. The A-end system and the B-end system are effective load devices, the C-end system is the control device, and the D-end system is the load data processing unit.

[0088] The process of information flow is: the payload device A-end system and B-end system send their own state information to the mass storage unit (E-end system), then the information sent by the A-end system to the E-end system is marked as f 15 , The information sent by the B-end system to the E-end system is denoted as f 25 ; At the same time, the A-side system and the B-side system send the original load data to the load data processing unit (the D-side system), and the information sent by the A-side system to the D-side system is m...

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Abstract

The invention discloses a method for constructing a moment dispatch list suitable for the SpaceWire network. The method comprises the steps that firstly periodic time-triggered messages are ranked, then the moment dispatch list format is initialized, finally transmission moments of the time-triggered messages are allocated according to transmission moment strategies until the transmission moments of all the time-triggered messages are planed, and the moment dispatch list is obtained through construction. Compared with an event-triggered SpaceWire network dispatching method, the SpaceWire network dispatching method maintains characteristics of simplicity and flexibility of event-triggered dispatching, and guarantees determinacy of data transmission delay through the time-triggered mode.

Description

Technical field [0001] The present invention relates to a method for constructing a time schedule, and more particularly, to a method for constructing a time schedule suitable for a SpaceWire network. The constructed time schedule can schedule the SpaceWire network triggered by time, which belongs to the field of spaceborne aviation communication technology. Background technique [0002] The SpaceWire bus is a serial, high-speed, point-to-point, full-duplex data network standard proposed by the European Space Agency (ESA), which is used for high-speed data transmission between modern spaceborne equipment. Its predecessor was IEEE 1355~1995. It was formally implemented by ESA in 2003. After three revisions, the latest version of the specification ECSS-E-ST-50-12C was released in July 2008. The SpaceWire bus has the advantages of high communication rate, strong fault tolerance, flexible topology, etc., which can well meet the needs of today's space missions, and has received the a...

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Application Information

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IPC IPC(8): H04L12/407
Inventor 何锋韩煜王琪代真熊华钢
Owner BEIHANG UNIV
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