A top-down positioning scheme for underwater wireless sensor networks

被引:22
作者
Zhang SenLin [1 ]
Zhang Qiang [1 ]
Liu MeiQin [1 ]
Fan Zhen [1 ]
机构
[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
基金
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词
underwater wireless sensor networks; top-down positioning scheme; node's confidence; gradient method; 3D Euclidean distance estimation; LOCALIZATION; CHALLENGES;
D O I
10.1007/s11432-013-4797-6
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In order to increase the localization coverage while keeping the localization error small in a unique network architecture in which there are not evenly distributed anchor nodes with great ability of communication or additional infrastructure, a Top-down Positioning Scheme (TPS) for underwater acoustic sensor networks is proposed. By defining node's confidence reasonably, TPS insures the quality of the new reference nodes. TPS also refines the nodes which have just been positioned via the gradient method and helps non-localized nodes search for more reference nodes via the new scheme for 3D Euclidean distance estimation. By comparing the new scheme for 3D Euclidean distance estimation with the existing scheme, the new scheme is shown to have greater ability to estimate two-hop Euclidean distance in 3D space. Simulation results show that TPS which integrates node's confidence defined reasonably, the gradient method, and the new scheme for 3D Euclidean distance estimation can increase the localization coverage ratio, while keeping the localization error small.
引用
收藏
页码:1 / 10
页数:10
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