NDLI: Efficient localization scheme based on coverage overlapping in wireless sensor networks

Content Provider	IEEE Xplore Digital Library
Author	Yeong-Sheng Chen Tang-Te Lo Wen-Chien Ma
Copyright Year	2010
Description	Author affiliation: Department of Computer Science, National Taipei University of Education, 106, Taiwan (Yeong-Sheng Chen; Tang-Te Lo; Wen-Chien Ma)
Abstract	Localization is an important and active topic in wireless sensor networks. This paper proposes a range free localization scheme based on coverage overlapping. The nodes knowing their locations are called reference nodes and the nodes without the knowledge of their locations are called unknown nodes. In addition, for a reference node, the area within its communication range is called the coverage region. In the proposed scheme, an unknown node identifies the coverage regions in which it is located by collecting beacon information from its neighboring reference nodes. The overlapped area of all the coverage regions should be the area where the unknown node is located in. An overlap point is defined to represent the overlapped area of two coverage regions. Besides, an overlap degree, which is the number of the coverage regions that cover this overlap point, is associated with each overlap point. All the overlap points that are not located in the Estimative Rectangle (ER), which can be derived by applying the CPE algorithm, are discarded. The remaining overlap points are sorted according to their overlap degrees. Moreover, among them, the ones with the maximum overlap degree are averaged and the averaged point is the estimated location of the unknown node. With the proposed mechanism, the reference nodes that cannot contribute to the localization accuracy are excluded, and hence better localization accuracy can be achieved. Experimental results show that the proposed scheme outperforms the related works, including Centroid and CPE algorithms, in term of better localization accuracy.
Starting Page	1
Ending Page	5
File Size	285005
Page Count	5
File Format	PDF
e-ISBN	9780984589333
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	ICST
Subject Keyword	localization Wireless sensor networks Accuracy coverage overlapping wireless sensor networks Estimation Signal processing algorithms Hardware Erbium Global Positioning System
Content Type	Text
Resource Type	Article

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