SpaceWire冗余网络故障检测恢复技术实现

Implementation of Fault Detection and Recovery Technique in SpaceWire Redundant Network

摘要:

为提高SapceWire网络可靠性,基于SpaceWire-D提出了一种应用于SpaceWire冗余网络的故障检测恢复技术。网络节点通过比较主、备份端口收到的时间码来判断链路故障状态,在确认主链路发生故障后,节点自动启用备份端口工作。通过引入时间码抖动容限参数,提高了节点对故障判断的准确性,避免了故障误判。测试结果表明,即使故障链路未与节点直接连接,节点也能够在一个时间槽长度内检测到链路故障并自动切换至备份链路。此技术保证了网络故障情况下的数据正确传输,提高了SpaceWire网络的可靠性,是一种稳定可靠的故障检测恢复技术。

Abstract:

A fault detection and recovery method based on SpaceWire-D for SpaceWire redundant network was proposed to improve the reliability of SpaceWire network. In the method, nodes detect link fault through comparing Time-Codes received from primary and redundant link, and enable redundant link automatically after confirming the fault of primary link. By introducing Time-Code jitter tolerance parameter, the fault detection accuracy is improved and the fault misjudgement is avoided. The experiment result shows that each node can detect link fault and switch to redundant link automatically within one Time-Slot, even the faulty link was not connected to the node directly. Therefore, the proposed method can ensure the data transmission when link faults occur, and improve the reliability of the SpaceWire network.