SpaceWire冗余热备份网络设计及分析

摘要

SpaceWire是由欧空局专门面向航天应用提出的新一代高速数据总线技术,在链路故障检测、故障恢复等方面得到了加强.为了解决链路拥堵和减少网络传输延时,SpaceWire-D提出了在网络中流通时间码、调度表的运作机制.由于航天领域对网络可靠性有着严格要求,路由器作为网络中不可缺少的组成部分,基于路由器的网络可靠性设计具有重要价值.本文通过对SpaceWire路由器和SpaceWire-D标准的研究,提出将SpaceWire-D标准时间码保留位的其中一位与路由器转发时间码模式切换有机结合的方法,实现SpaceWire网络冗余热备份功能,从而提高SpaceWire网络的可靠性.%SpaceWire is a new bussing technique provided by European Space Agency.SpaceWire enhances the functions of error detection and error recover.In order to solve the problem of blocking in the net and reduce the SpaceWire delay,SpaceWire-D performs the time-code flowing in the net and schedule table.Aerospace has high requirements for the reliability of network.Router is the indispensable component in the net,the design of network reliability based on router is great value.This text based on research of the SpaceWire router and SpaceWire-D standard,a method for switching the SpaceWire-D standard time-code reservation bit with the router forwarding time-code mode is proposed to realize the SpaceWire network redundancy hot backup function and enhance the reliability of the SpaceWire network.