摘要： 针对现有节点定位算法精度和覆盖率低、能耗高等问题,提出一种基于四面体模型的无线传感器网络节点定位算法。根据改进的接收信号强度指示算法测定未知节点与信标节点的距离,找到与未知节点最近的4个信标节点构成空间四面体,通过空间四面体的体积坐标换算得 出未知节点的位置信息,从而实现节点定位。将该算法应用于煤矿井下的节点定位,通过与基于投影模型的井下节点定位算法的实验仿真对比表明,该算法具有更高的定位精度和定位覆盖率,更低的节点能耗和网络成本开销。

关键词: 四面体模型, 无线传感器网络, 节点定位, 能耗, 定位精度, 定位覆盖率

Abstract: Most of the existing algorithms have problems of low accuracy,low coverage,and high cost.This paper proposes a positioning mechanism based on improved Received Signal Strength Indication(RSSI) and tetrahedral model.This mechanism determines the space tetrahedron where the unknown node locates according to the spatial improved RSSI location algorithm.The positions of unknown nodes are drawn by translating the volume coordinate of space tetrahedron.Thus the unknown nodes can be located.Then apply the positioning mechanism to underground coal mine.According to the simulating comparison with the underground localization algorithm based on projection model,this algorithm has higher accuracy and positioning coverage,and also reduces the overhead of network cost by cutting the node energy consumption.

Key words: tetrahedral model, Wireless Sensor Network(WSN), node positioning, energy consumption, positioning accuracy, positioning coverage rate

中图分类号: 

• TP301.6