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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
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)
