标题：Normal Vector based Fault-Tolerant Event Boundary Detection in Wireless Sensor Networks
作者：Wang, Wei; Zhang, Ruihua; Chen, Zhongwei; Ju, Lei
作者机构：[Wang, Wei; Zhang, Ruihua; Chen, Zhongwei; Ju, Lei] Shandong Univ, Sch Comp Sci & Technol, Jinan 250100, Peoples R China.
会议名称：12th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)
会议日期：JUL 16-18, 2013
来源：2013 12TH IEEE INTERNATIONAL CONFERENCE ON TRUST, SECURITY AND PRIVACY IN COMPUTING AND COMMUNICATIONS (TRUSTCOM 2013)
关键词：event boundary detection; normal vector; fault tolerant; wireless sensor; networks
摘要：This paper presented a distributed fault-tolerant event boundary detection scheme for wireless sensor networks. In this paper, the node coordinate and its reading were mapped on a 3D mesh surface, By comparing the node normal vector got by Normal Vector Based Fault-Tolerant Event Boundary Detection (NVBD) with a predefined threshold, the event boundary nodes are found. This approach was composed of two major tasks: (1) detecting the faulty node and then replacing its detection value with its neighbors' weighted median value; (2) computing node normal vector using its neighbors' detection values. Then we compared it with a threshold to judge if it is a boundary node. The results of numerical simulations show that the NVBD scheme can achieve a substantial improvement on detection performance.