基于RSSI跳数连续的DV-HOP改进算法  

Improved DV-HOP positioning algorithm using continuous hop count based on RSSI

作　　者：邬春明[1] 张金强[1] 焦龙龙[1] 

机构地区：[1]东北电力大学信息工程学院,吉林吉林132012

出　　处：《重庆邮电大学学报（自然科学版）》2015年第2期184-188,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：吉林省科技发展计划资助项目(20130206050GX)~~

摘　　要：针对经典DV-HOP（distance vector-hop）算法中节点间跳数信息对定位精度有较大影响这一问题,提出了一种基于接收信号强度指示（receive signal strength indicator,RSSI）的改进算法。该定位算法引入了连续跳数的定义,首先利用RSSI测距模型把直接邻居节点接收到的RSSI值转换为两节点之间的距离,再根据连续跳数的定义计算出两节点间的连续跳数。在相同的仿真网络环境里,与经典的DV-HOP算法相比,归一化定位误差降低了30%~45%;与其他改进定位算法相比,归一化定位误差也有不同程度的降低。仿真结果表明该改进算法大幅度地提高了定位精度。An improved algorithm based on RSSI is proposed to solve the problem that the information of hop counts among nodes has great influence on the localization accuracy of traditional DV-HOP（ distance vector-hop） algorithm. The improved method introduces the definition of continuous hop count. First of all,using RSSI ranging model,the RSSI values neighbor node receives are converted into the distance between neighbor nodes,then according to the definition of continuous hop count,the continuous hop count will be obtained. In the same simulation network environment,the normalized localization error is decreased by 30% ~ 45% compared with the traditional DV-HOP and has different degree of decrease compared with other improved algorithms. The simulation results show that this algorithm improves the localization accuracy substantially.

关 键 词：无线传感器网络 DV-HOP 接收信号强度指示(RSSI) 连续跳数 

分 类 号：TN926[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]