一种基于RSSI校验的无线传感器网络节点定位算法  

Localization Algorithm for Wireless Sensor Network Based on RSSI-verify

作　　者：汪炀[1,2] 黄刘生[1,2] 肖明军[1,2] 徐宏力[1,2] 

机构地区：[1]中国科学技术大学苏州研究院网络计算与信息安全研究中心,江苏苏州215123 [2]中国科学技术大学计算机科学技术系,安徽合肥230027

出　　处：《小型微型计算机系统》2009年第1期59-62,共4页Journal of Chinese Computer Systems

基　　金：国家"九七三"计划基金项目(2006CB303006)资助

摘　　要：由于事件发生的位置和获取信息的节点位置是无线传感器节点监测消息中所包含的重要信息,因此如何进行无线传感网络节点自定位成为了当前的一个研究热点.在过去权质心算法的研究基础上,本文提出了基于RSSI校验的无线传感器网络节点定位算法,利用固定节点之间的距离和RSSI值来校正移动节点与每个固定节点之间的权值,从而提高了算法的定位精度.实验结果表明,在相同实验环境下本算法的精度优于以往的权质心算法.尤其在平均定位误差方面,前者比后者改进了大约25%.Since the positions of events or nodes are the most important part of monitoring information from sensor nodes, how to obtain the accurate localization has become the focus of the attention. Based on Weighted Centroid method, this paper presents a new RSSI-verify based localization algorithm for wireless sensor network which takes the known distance and its corresponding RSSI between the fixed nodes into account and amends the weights of the fixed nodes, thus improving the localization accuracy of the mobile nodes. The experimental results show that the proposed method outperforms Weighted Centroid method under the same environment. Especially, the former decreases the average localization error by about 25% compared with the latter.

关 键 词：无线传感器网络 加权质心算法 RF信号 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]