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定位技术是无线传感器网络的基础理论和关键技术之一.在实际应用中,一些信标节点在部署以后其位置由于各种原因而会发生漂移,由此就使得依赖于这些信标节点来定位的其他节点将无法准确定位,或者产生很大定位误差.本文针对信标节点产生漂移情况下的节点定位问题,提出了一种基于区域划分的信标节点移动检测算法(AD-BMD),在区域划分的基础上,通过两次判定过程将移动的信标节点检测出来,并为每个信标设置了坐标可信度值.为合理利用移动的和未移动的信标节点,提出一种基于信标移动检测的信标择优定位算法(BMD-BOS),通过合理选择信标节点来对其它未知节点进行定位.实验结果证明,AD-BMD算法具有很高的检测正确率和较低错误率,检测效果好于LB和SSV方法.BMD-BOS算法的定位精度远远高于没有进行移动信标检测的定位算法(N-BMD)和将移动信标丢弃的定位算法(D-BMD).
Positioning technology is one of the basic theories and key technologies of wireless sensor networks.In practical applications, some beacon nodes drift after deployment due to various reasons, thus making reliance on these beacon nodes to locate Of the other nodes will not be able to locate accurately or have a large positioning error.In this paper, we propose a beacon node movement detection algorithm (AD-BMD) based on the region division when the beacon node drifts, Based on the regional division, the mobile beacon nodes are detected through two decision processes, and the coordinate credibility value is set for each beacon.To make rational use of both mobile and non-mobile beacon nodes, a Based on the beacon position detection (BMD-BOS) algorithm, the beacon nodes are selected to locate other unknown nodes. Experimental results show that the AD-BMD algorithm has high detection accuracy and low error The detection efficiency is better than that of LB and SSV methods.The localization accuracy of MBD-BOS algorithm is much higher than that of N-BMD without mobile beacon detection and the positioning calculation of dropping mobile beacons Act (D-BMD).