针对使用单个移动锚节点的非测距定位方法精度较低的问题,提出一种使用三个移动锚节点的非测距定位方法:三个锚节点在移动过程中相对位置不变,并周期性广播数据包,而未知节点利用接收到的具有相同时间戳的两个或者三个锚节点信息进行质心定位。采用Scan作为信标的移动路径,并使用OMNET++进行了仿真实验,结果表明,该方法比使用单个移动锚节点提高了定位精度,且不受节点部署密度的影响。
To improve the accuracy of non-ranging localization algorithm with single mobile anchor node,a three mobile anchor nodes aided non-ranging localization method was proposed.In this method,three mobile anchor nodes keep their relative positions stable in the process of their movement and they broadcast data packets periodically.The unknown nodes made the centroid localization based on two or three anchor node messages with same time stamps.Using Scan as the moving path of beacons,the simulation was made by using OMNET++.The results showed that the accuracy of localization with this method was improved by comparing to that with single mobile anchor node,and was not affected by the deployment density of nodes.