计算机与现代化

• 算法设计与分析 •    下一篇

种基于锚节点筛选的改进DV-Hop算法

  

  1. 南京大学电子科学与工程学院,江苏南京210023
  • 收稿日期:2014-01-17 出版日期:2014-05-28 发布日期:2014-05-30
  • 作者简介:左文珺(1983-),女,江苏盐城人,南京大学电子科学与工程学院硕士研究生,研究方向:无线传感器网络定位算法; 通信作者:叶芝慧(1967-),女,江苏靖江人,教授,研究方向: 移动通信,宽带无线网络,无线传感器网络,无线个域网,认知无线电以及相关的人工智能在移动通信中的应用。
  • 基金资助:
    国家自然科学基金资助项目(60932002); 江苏省科技支撑计划资助项目(BE2012155); 国家海洋公益重大专项(201205035)

An Improved DV-Hop Algorithm Based on Anchor Node Filtering

  1. School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
  • Received:2014-01-17 Online:2014-05-28 Published:2014-05-30

摘要: 作为一种经典的无线传感网节点非测距定位算法,DV-Hop定位算法有其一定的优势,但其仅适用于节点均匀分布的情况,如果在节点分布不均匀的网络中,定位结果则存在较大的偏差。针对这一问题,研究人员提出一种锚节点筛选定位算法(Anchors Filtering DV-Hop, AFDV-Hop),它是通过筛选合格的锚节点对未知节点定位。与DV-Hop算法相比,AFDV-Hop算法在节点分布不均匀的情况下,对定位精度有一定程度的改善,但由于该算法对均匀度的计算较为简略,算法的改进程度并不明显。本文对该算法中锚节点的筛选和均匀度的衡量方式进行改进,以验证此AFDV-Hop算法对DV-Hop算法改进的优越性。仿真结果表明,对于节点定位偏差的改善将随着节点不均匀度的增加而更为显著。

关键词: 无线传感器网络, 筛选, 锚节点筛选定位算法, 不均匀度

Abstract: As a classical non-ranging algorithm for wireless sensor network node localization, DV-Hop localization algorithm has advantages under the uniform distribution of nodes, whereas the nodes are nonuniform distribution, there is a large deviation in the positioning results. In response to this situation, many improved algorithms have been proposed such as Anchors Filtering DV-Hop (AFDV-Hop), which is qualified by screening of the unknown node localization anchor nodes. Compared with the conventional DV-Hop algorithm, the positioning accuracy of AFDV-Hop algorithm is improved to some extent. The method for the calculation of uniformity is more simple,  but the degree of improvement algorithm is not obvious. In this paper, the anchor node selection algorithm and uniformity measurement methods are improved. Simulation results indicate that the improvement of the node positioning deviation is more significant with the increase of the nodes nonuniformity.

Key words: wireless sensor network, filtering, AFDV-Hop, nonuniformit

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