基于线性参数加权评估机制的无线传感器网络节点定位

摘要

为解决无线传感器网络节点定位过程中拓扑计算复杂,且因随机误差因素导致定位精度不高等问题,提出一种新的无线传感器网络节点定位算法.评估接收到的锚节点信息,根据线性参数评估机制对待定位网络节点的位置进行初步估计,计算线性参数数值,搜寻到最佳的锚三角,使用加权评估方式,利用不同锚节点的三角定位参数进行多次加权平均计算,以获取节点的准确位置信息.仿真结果表明,与DV-hop算法、DV-distance算法相比,该算法的定位精确度更高,其定位过程中的误差更低.%In order to solve the problems such as complex topology computation and low positioning accuracy induced by random error factors in the localization process of Wireless Sensor Network (WSN) nodes,a new node localization algorithm for WSN is proposed.Firstly,the received anchor node information is evaluated and the position of the node to be localized is preliminary estimated according to the linear parameter evaluation mechanism.Secondly,the linear parameter value is calculated for searching the anchor triangle.Finally,the precise node position is obtained by using the weighted evaluation method which uses the triangle location parameters of different anchor nodes for multiple weighted average calculation.Simulation results show that this algorithm has higher localization accuracy and lower error compared with DV-hop algorithm and DV-distance algorithm.