Investigation On Attack-resistant Localization Algorithm In Mobile Wireless Sensor Networks

As one of the key supporting technologies,wireless sensor network(WSN)localization technology has solved the problem of high precision and low loss in static and secure network environment.But in recent years,with the wide application of mobile wireless sensor network(MWSN),the mobility of nodes has brought new challenges to the localization technology.The diversity and complexity of mobile network environment make node location reference information variable and bring mobile errors.Compared with the traditional sensor networks,MWSN is more vulnerable to attacks from outside the networks and interference within the networks,the anchors on which the positioning depends may be trapped to provide false beacon information,so that the nodes are mislocated.Therefore,the problem of secure location for mobile wireless sensor networks in non-secure scenes is urgently needed to be solved.This paper focuses on the research of security location algorithm in MWSN which based on Monte Carlo method.First of all,on the basis of consulting the existing literature,this paper summarizes the research status of WSN location and security positioning technology at home and abroad,and summarizes the shortcomings of the existing research.This paper introduces static WSN location and MWSN location algorithm,analyzes three typical attack models of location algorithm,summarizes the basic strategy of security location algorithm,and presents the performance evaluation standard of MWSN security location technology.Secondly,As a kind of special location algorithm in mobile wireless sensor networks,this thesis analyzes the performance and characteristics of Monte Carlo localization(MCL),Monte Carlo localization Boxed(MCB)algorithm and Multi-hop-based Monte Carlo localization(MMCL)algorithm,after that,this thesis compares their performance from the aspects of localization ratio,localization accuracy,anchor node density,and the speed of nodes and so on base on simulation.Combining with MWSN security location technology,this thesis analyzes the effect of spoofing attack on MCL algorithm,and verifies the anti-attack performance of SecMCL security location algorithm through simulation.Then,the performance of MCB algorithm in wormhole attack is analyzed,and a security location algorithm based on wormhole detection(DeWMCB)is proposed.The simulation results show that the improved algorithm can detect wormhole attack by whether the nodes can be positioned continuously.On the basis of eliminating the impact of the pseudo-anchor on the positioning process,the improved algorithm can improve the positioning accuracy and positioning rate.Next,this thesis firstly analyzes the effect of wormhole attack on MMCL algorithm.In order to resist wormhole attacks and improve localization performance,a secure LB-MMCL algorithm is proposed.Based on the abnormal nodes neighbor-lists when wormhole attack occurs,LB-MMCL can label and detect two kinds of wormhole link nodes according to distance-astrict property and packet uniqueness property,break wormhole links to mitigate the impact of wormhole attacks and enhance the node localization accuracy.The simulation results show that LB-MMCL can efficiently against the wormhole attack without extra-hardware,improve the node localization accuracy and the percentage of localizable nodes.Finally,the research work of this paper is summarized and suggestions are given for the follow-up research.