一种基于移动信标的无线传感网节能定位方法  

A Type of Energy-efficient Localization Method Based on Mobile Beacons for Wireless Sensor Networks

作　　者：沙超[1] 王汝传[1] 

机构地区：[1]南京邮电大学计算机学院,江苏南京210003

出　　处：《计算机技术与发展》2012年第12期51-54,共4页Computer Technology and Development

基　　金：国家自然科学基金资助项目(61103195);江苏省自然科学基金(BK2012436);江苏省高校自然科学基础研究项目(11KJB520014)

摘　　要：文中针对固定锚节点定位方法在定位精度、定位成功率及定位能耗等方面的缺陷,提出一种基于螺旋状轨迹的移动信标定位方法。单信标节点以恒定角速度,沿螺旋轨迹自内向外逆时针运动,在固定点广播其坐标信息,确保了网内节点皆可获得足够的信标信息。同时,通过对移动路径与移动时间的估算,进行能耗判定,制定待定位节点休眠调度策略。仿真结果表明,同RSSI与DV-HOP等方法相比,该方法不仅具备较高定位精度和定位成功率,其能耗开销也相对较低。In the light of its defects in precision, success rate and energy consumption,node localization method with fixed anchor node is not suitable for wireless sensor networks. A type of localization method using mobile beacons based on spiral-like moving path is pro posed in this paper. One beacon node moves along the spiral path counterclockwise with a constant angular velocity and broadcasts its co- ordinate on the fixed points to ensure that all of the unknown nodes in the network could obtain enough information. Meanwhile,accord- ing to the moving path and the localization time, energy consumption of the network could be estimated and also give the sleep scheduling strategy for the node to be localized. Simulation results show that,compared with the RSSI and DV-HOP algorithms, this method could not only promote the accuracy and success rate of localization,but also reduce the energy consumption.

关 键 词：无线传感网 移动信标 定位 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]