摘要
针对因障碍物影响而无法实现动态无线传感网MWSN(mobile wireless sensor network)高精度定位的问题,提出了基于RSSI信号传播模型的α-驱动更新的质心定位算法α-drive renewing weighted centroid localization(α-DRWCL)。根据WCL(weighted centroid localization)的距离计算公式,建立了路径衰减因子α的计算模型,利用边界探测装置的探测结果适时改变α的值,得到较接近实际情况的各参考节点权重,达到了减小定位误差的目的。在实验环境中对α-DRWCL算法进行定位仿真,仿真结果表明了该算法的精确性和有效性。
Aimed at the problems of accurate localization result of mobile wireless sensor network is always can＇t be achieved because of obstruction,a new localization algorithm is proposed named α-drive renewing weighted centroid localization（α-DRWCL）,which is based on the RSSI signal propagation model.The computation model of α（pass-loss exponent） is proposed on the basis of the distance computation algorithm in WCL.The value of α is altered adapt to environment,and more accurate weight of every reference node is acquired with the result of reducing the error of localization.The experiment is conducted in the simulate environment and the result is analyzed,which prove that the positioning method based on α-DRWCL algorithm is valid and accurate.
出处
《计算机工程与设计》
CSCD
北大核心
2012年第2期431-434,共4页
Computer Engineering and Design
基金
河南省重大科技攻关基金项目(2009A520029)
