A new method for node fault detection in wireless sensor networks.
A new method for node fault detection in wireless sensor networks.
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DOI：
10.3390/s90201282
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Jiang P
中科院分区：
文献类型：
--
作者：
Jiang P
无线传感器网络（WSNs）是监控分布式远程环境的重要工具。作为无线传感器网络的关键技术之一，节点故障检测在大多数无线传感器网络应用中是必不可少的。分布式故障检测（DFD）方案通过网络中相邻节点之间的数据交换和相互测试来检测出故障节点。但当待诊断的邻居节点数量较少且节点故障率较高时，DFD方案的故障检测精度会迅速下降。本文通过定义新的检测准则，提出了一种改进的DFD方案。仿真结果表明，改进的DFD方案在上述情况下表现良好，可以大大提高故障检测精度。
Wireless sensor networks (WSNs) are an important tool for monitoring distributed remote environments. As one of the key technologies involved in WSNs, node fault detection is indispensable in most WSN applications. It is well known that the distributed fault detection (DFD) scheme checks out the failed nodes by exchanging data and mutually testing among neighbor nodes in this network., but the fault detection accuracy of a DFD scheme would decrease rapidly when the number of neighbor nodes to be diagnosed is small and the node's failure ratio is high. In this paper, an improved DFD scheme is proposed by defining new detection criteria. Simulation results demonstrate that the improved DFD scheme performs well in the above situation and can increase the fault detection accuracy greatly.