电讯技术Issue(11)：1219-1224,6.DOI:10.3969/j.issn.1001-893x.2015.11.006
无线传感器网络中DV-Hop定位方法的一种改进策略
An Improved DV-Hop Localization Scheme for Wireless Sensor Networks
摘要
Abstract
The node localization process of the traditional Distance Vector-Hop( DV-Hop) method can be summarized as two steps,the distance estimation and the position calculation. The node-beacon distance estimation accuracy is sensitive to the heterogeneity of network topology,and the location derivation algo-rithm is sensitive to the node-beacon distance estimation accuracy. In this way,the robustness of the meth-od is poor while the network topology is diversiform. To solve such a problem,an improvement strategy is put forward and the main work includes:in the distance estimation step,the average hop distance between the nearest beacon within one jump of an unknown node and every other beacon is used as the average hop distance between the unknown node and the beacon to calculate the node-beacon distance,in order to im-prove the node-beacon distance estimation accuracy;in the position calculation step,a refining process u-sing Newton iterative algorithm is added after the initial position of an unknown node is derived using Later-ation algorithm,in order to improve the node localization accuracy. Simulation shows that under the same network conditions,compared with the original method and another representative improved algorithm,the proposed strategy can obtain higher distance estimation accuracy in the first step,and then,it can improve the robustness to distance estimation error in the second step. Thereby,the strategy can improve the aver-age localization accuracy of the unknown nodes in the network.关键词
无线传感器网络/DV-Hop 方法/节点定位/Lateration算法/牛顿迭代法Key words
wireless sensor netwok/DV-Hop method/node localization/Lateration algorithm/Newton itera-tive algorithm分类
信息技术与安全科学引用本文复制引用
石琴琴,周俊杰,张建平..无线传感器网络中DV-Hop定位方法的一种改进策略[J].电讯技术,2015,(11):1219-1224,6.基金项目
国家自然科学基金资助项目(61103180) （61103180）
上海应用技术学院协同创新基金项目(XTCX2015-11) （XTCX2015-11）
