无线传感器网络中的节点位置验证方法∗

摘要

Locations of sensor nodes are an important contextfor the sensed data. Self-localization isone of the most essential technologies in WSNs. Since most current sensor localization schemesrely on location information that is provided by beacon nodes,reliability of the locations provided by beacon nodes becomes criticaltothe quality of net-workservice. Beacons drifting and malicious beacons lead to decline accuracy of sensor localization. A lightweight and distributedReputationbasedLocationVerificationscheme(RLV)is proposed. In our proposed scheme,we can i-dentify unreliable beacons by establishing a comprehensivereputationmodel based on mutual observations of sensor nodes. Extensive simulation results show that the reputation model can reflect the accuracy of nodes position authen-tically. And RLV can detect more than 95% of unreliable beacons.%节点位置信息是感测数据的重要上下文信息,节点自定位技术是无线传感器网络的支撑技术之一。在基于信标节点的定位技术中,信标节点位置的可靠性是影响网络服务质量的关键因素。针对信标节点位置漂移和恶意信标节点引起定位精度下降的问题,提出了一种基于信誉模型的分布式轻量级节点位置验证方法(ReputationbasedLocationVerification,RLV),通过建立无线传感器网络中的节点位置信誉模型来识别网络中的不可靠信标节点。仿真结果表明信誉模型能够较好的反映节点的定位精度,RLV算法可以探测出95%以上的不可靠信标节点。