摘要
针对Dv-hop算法在估算跳数时引进较大误差的问题,提出了一种基于区间范围内修正跳数(RHWSR)的算法。根据Dv-hop算法定位过程,在平均每跳距离估算、未知节点到各参考节点之间距离的计算等两方面进行了改进,分析和仿真了不同通信半径与锚节点比率情况下的定位性能。结果表明,提出的改进措施可极大地提高节点定位精度。此外,改进措施不改变Dv-hop算法的定位过程,因此不需要增加网络通信量,是节点定位的一种可选方案。
This paper proposes an algorithm of revision hops within a certain space range（RHWSR） to address the problem that Dv-hop localization algorithm of wireless sensor networks produces so much error of hops estimation.According to the localization principle of the Dv-hop algorithm,this paper proposes two improvements including the estimation of average single hop distance,the calculation of distance between unknown nodes and reference nodes.The localization performances are analyzed in theory and with simulations at different communication radius and the rate of anchor nodes.The results show that the proposed improvements can greatly enhance the localization accuracy of the unknown nodes.In addition,the proposed schemes do not change the localization process of the Dv-hop algorithm,and hence they need no further communication resource.It is an optional scheme of localization.
出处
《计算机系统应用》
2011年第3期49-53,69,共6页
Computer Systems & Applications
基金
国家自然科学基金(90715043)
