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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 484-487

Research and Application in the Key Technology of Wireless Sensor Network Location System

Chunhe Shi Xiaowei Han, Zhonghu Yuan, and Daquan Yang

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An algorithm of Localization is proposed to solve problems of DV-Hop overlapping and localization inaccuracy by adopting RSSI ranging technology to do subsidiary localization. A reasonable RSSI model is set up and introduced. The ratio of different distance can be gained from the measured value of RSSI ratio. Compared the received RSSI value with the calculated average RSSI value, the ratio is set as a hop-count and is saved. When the hop-count is more than 1, the calculated ratio in first phase is accumulated separately, which is used to reduce the location error significantly. The simulation experimental results show that the improved algorithm of localization is more stable, reliable and precise. Under the circumstance of fairly standard topology, compared with localization accuracy of other present algorithms of localization, about 10% can be raised.

Index Terms

wireless sensor networks, localization systems, DV-Hop, RSSI

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