基于移动节点的无线传感器网络节点定位新算法

摘要

In consideration of the low accuracy and high energy consumption of existing mobile anchor point based node localization algorithms for wireless sensor networks, this study puts forward a new node localization algorithm based on mobile anchor points.When using the algorithm, mobile anchor points move across the network in a particular model and broadcast beacon messages with position information in a certain period.Unknown sensor nodes receive the beacons within the sensing range.Then, the beacons' locating information, received signal strength and the property of particular move model are used to estimate sensor nodes' location based on geometric principles.Simulation result shows that proposed localization algorithm is efficient in improving the localization accuracy, stabilization and energy utilization compared with other localization algorithms.%针对现有基于移动节点的无线传感器网络节点定位算法精度不高、能耗大的问题,提出了一种新的利用移动节点定位未知节点的算法.该算法通过移动节点在未知节点所处区域按照一定的移动模式进行移动,周期性地广播信标点的位置信息,未知节点接收信标点,收集信标点的位置信息；根据信标点的位置信息和接收信号的强度,同时结合移动节点的移动规律,利用几何原理,对未知节点的位置进行多次限定,从而实现未知节点的定位.仿真结果表明,与其他定位算法相比,该算法能有效地提高节点的定位精度、稳定度和能量利用效率.