基于多通信半径和跳距加权的WSNs三维迭代定位算法 �

针对三维DV-Hop全局跳数划分不够精确,平均跳距与实际跳距偏差大导致定位误差大的问题,提出一种基于多通信半径和跳距加权的WSNs三维迭代定位算法。首先,参考锚节点比例设置跳数阈值进行迭代定位;其次,利用多通信半径和多跳跳数偏差对单跳和多跳节点跳数进行精确划分;最后,将估计跳距与最大通信半径的偏差设为平均跳距的权值,采用最小最大法计算节点位置。仿真结果表明,在锚节点比例较大和通信距离较短时,该算法与3D-DVHop、3D-WD-DVHop和基于三维球形分割定位算法相比,定位精度明显提高。

A 3d Iterative Location Algorithm for WSNs Based on Multiple Communication Radii and Hop Distance Weighting

In order to solve the problem that the global hop number of 3D DV-Hop is not accurate enough and the deviation between the average hop distance and the actual hop distance is large,which leads to large positioning error,a three-dimensional iterative location algorithm for WSNs based on multi-communication radii and hop distance weighting is proposed.Firstly,the hop threshold is set with reference to the anchor node ratio for iterative positioning.Secondly,the hop number of single-hop and multi-hop nodes are accurately divided by the multi-communication radius and multi-hop number deviation.Finally,the deviation between the estimated hop distance and the maximum communication radius is set as the weight of the average hop distance,and the Min-Max method is adopted to calculate the node position.The simulation results show that,compared with 3D-DVHop,3D-WD-DVHop and three-dimensional spherical segmentation localization algorithm,the positioning accuracy of the proposed algorithm is significantly improved with a large proportion of anchor nodes and a short communication distance.