无线传感器节点均匀性估计算法及其应用 |
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引用本文: | 宫娜娜,王缓缓. 无线传感器节点均匀性估计算法及其应用[J]. 电子科技大学学报(自然科学版), 2014, 43(3): 347-352. DOI: 10.3969/j.issn.1001-0548.2014.03.005 |
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作者姓名: | 宫娜娜 王缓缓 |
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作者单位: | 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 |
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基金项目: | 河南省科技攻关项目(122102310412) |
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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.
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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 |
收稿时间: | 2013-03-08 |
Measurement of Uniformity for Wireless Sensor Nodes and Its Application |
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Affiliation: | 1.Key Laboratory of Sensor Technology and Application of IOT,Huanghe Science and Technology College of China Zhengzhou 450063 |
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Abstract: | 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. |
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