无线传感器节点均匀性估计算法及其应用  

Measurement of Uniformity for Wireless Sensor Nodes and Its Application

作　　者：宫娜娜[1] 王缓缓[1] 

机构地区：[1]黄河科技学院物联网传感技术及其应用郑州市重点实验室,郑州450063

出　　处：《电子科技大学学报》2014年第3期347-352,共6页Journal of University of Electronic Science and Technology of China

基　　金：河南省科技攻关项目(122102310412)

摘　　要：无线传感器网络中锚节点的分布情况是一个重要指标,在很大程度上影响未知节点定位的精度,但目前对均匀性的分析却很少。通过比较邻居节点的接收信号强度(RSS)确定未知节点移动后远离和靠近的锚节点个数,以此研究未知节点周围锚节点的分布情况。提出了一种对锚节点均匀性进行定量估计的算法,给出了均匀性评价指标——归一化均匀性偏差的概念及公式。将该算法应用到节点定位过程中,提出混合定位算法。仿真结果表明,基于均匀性估计的混合定位算法能提高原有算法的定位精度。The uniformity of anchor nodes distribution in a wireless sensor network has a very important impact on the positioning accuracy, but the related research is limited. In this paper, a method for measurement of uniformity is presented, a new criterion of normalized uniformity discrepancy is given, and then a hybrid algorithm for node localization is proposed. Experimental results show that the method for measurement of uniformity is effective and the hybrid algorithm improves the positioning accuracy.

关 键 词：质心算法 接收信号强度指示 传感器节点 最小包含圆 均匀性 无线传感器网络 

分 类 号：TN911[电子电信—通信与信息系统]