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HCRL: A Hop-Count-Ratio based Localization in Wireless Sensor Networks

HCRL: A Hop-Count-Ratio based Localization in Wireless Sensor Networks,10.1109/SAHCN.2007.4292815,Sungwon Yang,Jiyoung Yi,Hojung Cha

HCRL: A Hop-Count-Ratio based Localization in Wireless Sensor Networks   (Citations: 20)
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Abstract—Determining the positions of nodes is essential inmany applications and geographic routing protocols of Wireless Sensor Networks. Since localization is a fundamental component of sensor networks, the cost for localization itself should be minimized. In this paper, we focus on developing a localization algorithm which provides both,low-cost and ,accuracy. Considering these requirements, we propose a novel range-free localization technique, called HCRL, which uses only the ratios of anchor-to-node hop-counts. HCRLsatisfies low-cost with a single flooding from a small number of anchor nodes, and subdivides one-hop into several sub-hops by transmission power control to improve localization accuracy. Unlike previous work, we have conducted real experiments, which were made possible by using an external antenna with an omni-directional radiation pattern. The experimental results show that the performance of HCRL is superior to the conventional DV-Hop scheme with a small transmission overhead. Index Terms— Wireless Sensor Networks, Localization, Hop-count
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