无线传感器网络质心算法的最佳通信半径  

Optimal Communication Range of Centroid Location Algorithm for Wireless Sensor Networks

作　　者：宫娜娜[1] 王缓缓[1] 

机构地区：[1]黄河科技学院信息工程学院通信系,河南郑州450063

出　　处：《计算机仿真》2013年第5期203-207,共5页Computer Simulation

基　　金：河南省科技厅项目(112102310582);河南省教育厅项目(12B520020);郑州市科技局项目(20120411)

摘　　要：关于无线传感器网络节点定位的精度优化问题,由于定位精度受到通信距离的影响,直接与能耗相关。为了在节点通信半径可调的网络中,能以较小的功耗达到较高的定位精度,提出一个新颖的解决思路,从通信半径的设定角度提高定位精度。以经典的质心算法为例,分析了通信半径对定位算法精度的影响,提出了最佳通信半径的概念。在最佳通信半径上,定位的相对误差第一次达到了极小值,到达了高精度、低功耗的目标。改变信标节点个数,得到不同条件下的最佳通信半径结果。由不同条件下的仿真数据,利用曲线拟合技术,得到了最佳通信半径函数表达式。仿真结果表明,改进方法对于实际工程中通信半径的设定具有积极的参考价值。In order to minimize the energy cost and improve the precision of location in wireless sensors networks with adjustable communication range, a novel solution which uses the communication range to improve the precision of location was put forward. The impact of communication range on centroid location algorithm performance was ana- lyzed, and optimal communication range was proposed. The relative error can reach a minimum for the first time at the optimal communication range where the high precision and low consume goals were achieved. Number of beacon nodes were changed to get some optimal communication ranges data. According to the simulation data, the approxima- ting function was obtained by the curve-fitting method. Simulation results show that it can be a big help for engineers to select the communication range.

关 键 词：无线传感器网络 质心算法 最佳通信半径 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]