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A Selection Method of Reference Access Points to Improve the Localization Accuracy in Indoor Environments  

Lim, Yu-Jin (수원대학교 정보미디어학과)
Park, Jae-Sung (수원대학교 인터넷정보공학과)
Publication Information
Journal of KIISE:Information Networking / v.37, no.6, 2010 , pp. 489-493 More about this Journal
Abstract
In an indoor localization method taking the lateration-based approach, the distance between a target and an AP (Anchor Point) is estimated using RSS (Received Signal Strength) measurements. Since the characteristics of a radio signal randomly vary in time and space, errors are unavoidable in distance estimation with measured RSS. Since the accuracy of distance estimation affects the localization accuracy of a lateration-based method, additional APs hearing a target have been used for localization in the literature. However, lots of experimental results show that the accuracy of a lateration-based method is improved by using carefully selected APs measuring the high quality RSSs which the distances estimated is close to the actual distances between nodes as reference APs, not using merely more APs. In this paper, we focus on selection method of reference AP and distance estimation method reflecting on environmental dynamics. We validate our method by implementing an indoor localization system and evaluating the accuracy of our method in the various experimental environments.
Keywords
RSS(Received Signal Strength); lateration; indoor localization;
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