WSN中节点定位方法的改进

无线传感器网络节点位置信息的获取非常关键。首先考虑节点分布问题提出了一种新的节点分布模式,并改进定位算法,将节点定位过程主要分为一级定位和二级定位。一级定位采用基于优先值阈值的质心定位算法,并将一级定位的节点作为新锚节点参与二级定位。二级定位使用基于优先值阈值的DV-Hop最小二乘定位算法。Matlab仿真结果证明,提出的节点分布模式利于节点定位,一级定位算法降低了计算量,并与二级定位算法一起提高了定位精度。

Improvement of Node Locating Algorithm in WSN

It is of great importance to acquire the node location information of wireless sensor network. Firstly, for the problem of node distribution, a novel node distribution model is proposed, and the locating algorithm modified. Meanwhile,the node locating process is divided into first-stage locating and second-stage locating. The first-stage locating adopts centroid locating algorithm based on priority threshold, with its node as a new anchor node participating in the second-stage locating,while the second-stage locating uses DV-Hop locating algorithm based on least square priority threshold. Matlab simulation results show that the proposed node distribution model could facilitate node locating, the first-stage locating algorithm could reduce the amount of calculation and together with the second-stage locating algorithm,improve the locating precision.