一种改进的无线自主传感器网络定位算法

Improved Location Algorithm for Wireless Sensor Networks

节点定位技术是无线自主传感器网络中的关键技术之一。为了提高定位精度,提出一种基于几何斜率的无线传感器网络(WSN)定位算法。网络区域中的节点分为锚节点和未知节点,利用几何学斜率的方法选取合适的锚节点,能够更精确地确定未知节点的位置。在三边测量法上运用最小平方误差方法求解,能够提高算法的精度。在新算法的基础上建立Matlab仿真。仿真结果表明改进的DV-HOP算法,在相同的锚节点数量的情况下,节点定位精度有明显的提高。

The location information of the sensor node is one of the key technologies in Wireless sensor network（WSN）.To improve the location accuracy,a geometric localization algorithmis proposed for wireless sensor networks.Nodes in the network area is divided into anchor nodes and unknown nodes,using the method of slope geometry,select the appropriate anchor node,to determine the location of unknown nodes more accurately.This paper proposed the least square error method based on the trilateration to improve the algorithm accuracy.A Matlab simulation model based on the new algorithm is established.The results show that the proposed algorithm improves node location accuracy a lot with same amount of anchor nodes under same radio range condition.