基于簇内RSSI测距改进的DV-Hop算法  

Intra-cluster Improved DV-Hop Localization Algorithm Based on RSSI Mechanism

作　　者：黄晨钟[1] 许力[1] 叶阿勇[1] 钟进发[1] 

机构地区：[1]福建师范大学网络安全与密码技术重点实验室,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2010年第6期29-34,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省科技计划项目(2008F5020);福建省教育厅重点资助项目(JA07030);福建省自然科学基金资助项目(2008J0014)

摘　　要：针对DV-Hop定位算法在实际环境中的定位精度较低、通信量较大等问题,在DV-Hop定位算法的基础上提出了一种基于簇内RSSI测距改进的DV-Hop定位算法.该算法利用以信标节点为簇头的分簇策略后,信标节点只发送校正值给其邻居节点,无需泛洪广播,且未知节点只需被动接收,无需交互通信,从而降低网络通信总量;簇内节点利用RSSI测距方案计算其与最近信标节点的距离,相比DV-Hop定位算法以校正值代替一跳通信范围内的所有节点距离更加精确,从而提高节点定位精度.Low localization accuracy and the high cost of network communication is a problem in DV-Hop localization algorithm.To solve the problem above,an intra-cluster improved scheme based on RSSI mechanism is proposed.After clustering the nodes in the network based beacon nodes,each beacon node sends one-hop correction value to its one-hop neighbor nodes only without ＂flooding broadcast＂.Unknown node is just a passive receiver instead of interactive communication.As a result,the total cost of network communication is lower than DV-Hop.Because of the distance between unknown nodes and the nearest beacon nodes in the cluster is calculated by RSSI mechanism,so the distance is more accurate than the one-hop correction in the DV-hop localization algorithm.

关 键 词：无线传感器网络 RSSI DV-HOP算法 

分 类 号：TP393.7[自动化与计算机技术—计算机应用技术]