无线传感器网络环境下的一种轻量级事件容错检测算法

发布时间：2018-05-27 16:34

本文选题：无线传感器网络 + 事件检测　；参考：《传感技术学报》2014年01期

【摘要】：由于节点经常布置于恶劣的环境中以及节点自身资源的有限性,节点在运行过程中容易发生漏警错误和虚警错误,因此容错的事件检测方法受到了广泛的重视与研究。但传统方法在性能上表现出计算复杂度高和能耗大的特点,针对此,引入雷达目标检测中Cth/m的检测思想,提出一种基于时空特性的检测方法。该方法通过观察节点采样值数据变化率与时间特性相似度来判断是事件发生还是节点出错。方法在一次迭代过程中,节点只需做m次距离比较和一次邻居状态查询,根据节点间的空间特性做出决策,表现出轻量级和低能耗的特点。仿真表明,方法还具有较低的漏警率和虚警率以及较高的故障识别率。此外,由于引入了节点可信度自适应调整机制,方法能够保证事件检测概率在迭代过程中一直保持较高水平,而不随时间恶化。
[Abstract]:Because nodes are often arranged in bad environment and the resources of nodes are limited, the fault tolerant event detection methods are widely studied and paid more attention to because the nodes are prone to false alarm errors and false alarm errors in the running process. However, the traditional methods have the characteristics of high computational complexity and high energy consumption. In view of this, a detection method based on space-time characteristics is proposed by introducing the idea of Cth/m detection in radar target detection. By observing the similarity between the change rate of sampling data and the time characteristic, the method can determine whether the event occurred or the node error occurred. Methods in an iterative process, nodes only need m distance comparison and one neighbor state query to make decisions according to the spatial characteristics of nodes, showing the characteristics of lightweight and low energy consumption. The simulation results show that the method also has lower false alarm rate and higher fault identification rate. In addition, because the adaptive adjustment mechanism of node credibility is introduced, the method can ensure that the probability of event detection remains at a high level in the iterative process without deteriorating with time.
【作者单位】：武汉理工大学航运学院;武汉理工大学信息工程学院;浙江交通职业技术学院;
【基金】：国家自然科学基金项目(51279151) 中央高校基本科研业务费专项资金项目(2012-IV-28,2013-ZY-104) 浙江省交通运输厅科技计划项目(2012w05,2012w06)
【分类号】：TP212.9;TN929.5

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