无线传感器网络中一种基于定向天线的节点定位算法

节点定位问题是无线传感器网络中的一个基本而非常重要的问题。已有的定位算法大致可以分为两类:基于测距的和无需测距的。基于测距的定位算法需要额外硬件的支持,成本较高,不适用于大规模的传感器网络;无需测距的定位算法不需要额外硬件的支持,是解决传感器网络节点定位问题的一个较为经济适用的方法。本文提出了一种新的基于定向天线的无需测距的分布式定位算法。其主要原理在于利用定向天线确定邻居节点之间的相对位置,然后判断未知节点是否在锚节点构成的三角形内。仿真研究表明,提出的算法是有效的,能够取得较好的定位精度。

A Localization Algorithm Based on the Directional Antenna in Wireless Sensor Networks

Node localization is a fundamental and important issue in Wireless Sensor Networks(WSNs).Many localization algorithms have been proposed,and these existing algorithms can be roughly classified into two categories:the range-based ones and range-free ones.The former requires the sensors to be equipped with additional hardware,has higher cost and does not suitable for large scale WSNs.While the latter does not need for additional hardware,so is a cost-effective approach for solving node localization problem.A ...