无线传感器网络中定位误差对覆盖控制算法的性能影响  

Effect of location error on performance of coverage control in wireless sensor networks

作　　者：石高涛[1] 王樱锦[1] 

机构地区：[1]天津大学计算机科学与技术学院,天津300072

出　　处：《计算机应用研究》2009年第4期1460-1462,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(90604013);国家"863"计划资助项目(2007AA01Z220);国家教育部博士点新教师基金资助项目(200800561042)

摘　　要：覆盖控制是无线传感器网络中的一个基本问题,其主要目的是在保证全覆盖要求的同时调度冗余节点轮流工作。为了找出冗余节点,当前的研究工作大都假定节点已经拥有精确的地理位置信息,但实际应用中节点是无法获取到精确的位置信息,为此,研究当节点位置信息存在误差时对覆盖控制算法的影响,分析了全覆盖控制算法的缺陷和失效的原因,并通过仿真研究了多种因素变化时的网络覆盖率变化规律。结果表明,在节点位置存在误差的情况下,网络覆盖率会随着误差率、网络区域、节点密度和感知半径的增加而降低。该结果为研究实用化的网络覆盖控制算法提供依据。Coverage control is the basic problem in wireless sensor networks. Its main objective is to schedule the redundancy node to work alternately under the requirement that the full-coverage is guaranteed. However, the existing works required ac- curate knowledge of the sensors locations to find the redundancy nodes, which could not be easily obtained. Studied the effect of location error on the performance of coverage control. Analyzed the shortcoming and the failure reason of the existing algo- rithms. Conducted some extensive simulations to evaluate the performance varying with different factor. The results show that the coverage rate will decrease with the increasing of error, network size, node density and sensing range.

关 键 词：无线传感器网络 定位误差 覆盖控制 地理位置信息 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]