摘要
定位是无线传感器网络研究的一个热门课题。提出一种基于Zigbee的混合定位算法,将TOA(Time of Arrival)测距与DV_distance定位算法加以融合。TOA测得相邻节点间距离后,利用DV_distance获得未知节点到锚节点的累加距离并加以修正后对节点定位。其中TOA利用Zigbee网络中MAC(medium access control sub-layer)层协议,无需增加额外硬件实现精准测距。该混合算法定位精度高,受网络中锚节点所占比例影响小,适用于大规模传感器网络定位。
Localization is an emerging subject in the filed of Wireless Sensors Networks（WSNs）.This paper describes a hybrid localization approach combinning TOA（Time of Arrival） ranging with DV_distance localization algorithm based on Zigbee networks.The main principle of hybrid scheme is using DV_distance to get the culmulative distance with correction,after ranging the neighbor-nodes distance by TOA.The TOA ranging based on MAC-layer protocal of Zigbee can get a perfect result with no additional hardwares.This approach shows perfect precision,less affected by the proportion of anchor nodes,which is quite suitable for localization in large scale WSNs.
出处
《计算机系统应用》
2012年第1期77-80,共4页
Computer Systems & Applications
基金
安徽省教育厅自然科学基金(2005KJ004ZD)
