基于跳数-角度因子评估的WSN节点定位算法

摘要

当前无线传感网节点定位算法易受环境噪声的影响,且通过一次定位技术实现节点位置估算,使其存在较大的定位误差的问题,提出一种基于跳数-角度因子评估机制的无线传感网WSN节点定位算法.依据待定位节点依据与锚节点距离的远近,搜寻中继评估节点,依据该节点隶属的聚类进行初步定位计算;定义跳数响度因子,将其嵌入在定位过程中,计算初步定位数据的平均分布数值,实现节点二次精确定位,提高定位数据的精确程度.仿真结果表明,与DV-plus算法和DV-short算法相比,所提算法能够节约定位过程中的定位数据投送,降低定位误差,提高定位坐标的精确程度.%Traditional wireless sensor network node localization algorithm has problems including large positioning error,poor convergence performance and low positioning accuracy.To solve the problems,wireless sensor network node localization algorithm based on hop count-angle factor was proposed.By introducing the way of relay evaluation node,when the node location needed to be located,the relay node was searched,and the cluster was calculated according to the cluster of the node.In the process of positioning,the average distribution of the initial positioning data was calculated by introducing the hop count nonlinear factor,and the accuracy of the location data was improved.Simulation results show that compared with DV-plus and DVshort algorithm,the proposed algorithm can effectively save the positioning of the positioning data delivery,reduce positioning error,improve positioning accuracy,and it has strong practical application value.