A hybrid range-free localization scheme in wireless sensor networks work in progress

Authors:
Jianbo Li;Liusheng Huang;Mingjun Xiao;Hongli Xu
Affiliations:
University of Science and Technology of China Hefei, P. R. China and Qingdao university, Qingdao, P. R. China;University of Science and Technology of China Hefei, P. R. China;University of Science and Technology of China Hefei, P. R. China;University of Science and Technology of China Hefei, P. R. China
Venue:
Proceedings of the 2nd international conference on Scalable information systems
Year:
2007

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Abstract

The localization information of each node in Wireless Sensor Networks (WSNs) is of vital importance to most location-aware applications. In this paper, a hybrid range-free localization scheme is proposed by adopting DV-Hop and weighted Centroid localization schemes. The nodes in the sensor network are firstly grouped into clusters, and then Weighted Centroid localization scheme is employed to achieve the location of most sensor nodes in each cluster. Finally, location of "undetermined" nodes is computed by using DV-Hop. The proposed localization algorithm achieves a balance between cost and accuracy, while yielding an acceptable accuracy and obtaining the scalability of sensor networks. Simulation results show that our proposed algorithm performs well under the condition that comparatively high density of anchor nodes are deployed.