工业无线传感器网络节点通信中的瞬时故障恢复

Fault recovery of the node communication transient faults in the industrial wireless sensor network

无线传感器网络在工业领域应用广泛,由于电磁干扰、电源突然中断、软件突发错误等瞬时故障导致系统失效,影响系统安全,其控制和恢复在涉及安全的领域越发得到重视。考虑到瞬时故障在网络的多个层次可能都有发生,提出了一种三层故障处理机制,在芯片级采用硬件逻辑调整、在节点级采用重传和跳频、在系统级采用冗余路由等措施进行故障控制和恢复。实验结果表明,采用三层故障处理机制后,网络的丢包率和端对端的时延有效降低,节点通信的可靠性和安全性得到有效的提高。

Now the wireless sensor network is widely used in the modem industrial filed. System failure should be caused by the transient faults, such as electromagnetic interference （EMI）, unexpected power-off and burst software error. The transient faults recovery and safety control are aroused. Considering the transient faults come from the whole network, in this paper a three layers fault handling mechanism was proposed. The hardware logic was adjusted in the chip layer, the technology of retransmission and frequency hopping were used in the node layer, the redundancy route was employed in the system layer. The experimental results show that the packet loss rate and the end-to-end delay are effectively reduced by using the mechanism, so the reliability and security of the communication is effectively improved.