WSNs中一种基于移动信标检测的定位算法  

An algorithm for localization based on mobile beacon detection in WSNs

作　　者：金纯[1,2] 王升刚 尹远阳[1] 

机构地区：[1]重庆邮电大学无线传输技术研究所,重庆400065 [2]重庆金瓯科技发展有限责任公司,重庆400041

出　　处：《传感器与微系统》2014年第2期142-145,共4页Transducer and Microsystem Technologies

基　　金：国家创新基金资助项目(11C26215113536);重庆市科技攻关计划资助项目(CSTC2009AC6203)

摘　　要：信标节点在无线传感器网络(WSNs)定位技术中起着重要的作用,它作为参考节点决定着被定位目标的位置。在WSNs的实际环境应用中,信标节点可能会因为各种原因发生移动成为不可靠的信标节点,此时依赖不可靠信标节点来定位的未知节点将可能产生较大的定位误差,甚至失去了利用价值。针对信标节点发生移动的问题,提出了一种定位前期的基于可用信标的移动信标检测(BAB—BMD)方案。在节点定位之前,对定位节点收到的所有信标进行检测,并对移动信标重定位计算其可靠度。然后,依据信标可靠度选择可用信标节点进行定位,即基于可用信标的信标择优(BAB—BOS)算法。实验结果表明:BABBMD具有较好的检测准确度,同时采用BAB—BOS定位算法定位准确度要高于未进行移动信标检测的定位准确度和丢弃移动信标的定位准确度。Beacon nodes are playing an important role in wireless sensor networks （WSNs） localization,which are used as the reference nodes to calculate the target position.But,the unnoticed changes of locations of some beacons may occur because of various reasons in the actual environment of WSNs applications.So,the moved beacons may become unreliable nodes and at this time if we depend on the moved beacon nodes to locate the unknown node may affect the localization precision,and even lost the use value.A scheme of beacon movement detection based on the available beacon （BAB-BMD） is proposed,aiming at the problem of beacon node movement.This algorithm detects all the beacon nodes and calculates reliability for each beacon which is received by the unknown nodes before the localization.Then select the high reliability of beacon nodes as the reference nodes in the first place for localization which is beacon optimal selection based on the available beacon （BAB-BOS）.Experimental results show that BAB-BMD has good detection for beacon movement.At the same time,BAB-BOS also has a better positioning accuracy compared with no detection of beacon movement and discard the moved beacon.

关 键 词：无线传感器网络 信标移动检测 节点定位 信标可靠度 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]