Self-Organizing Location Estimation Method Using Received Signal Strength

Yasuhisa TAKIZAWA  Peter DAVIS  Makoto KAWAI  Hisato IWAI  Akira YAMAGUCHI  Sadao OBANA  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.10   pp.2687-2695
Publication Date: 2006/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.10.2687
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
positioning system,  ad hoc networks,  self-organizing maps,  context-aware,  ubiquitous computing,  

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The location information of ubiquitous objects is one of the key issues for context-aware systems. Therefore, several positioning systems to obtain precise location information have been researched. However, they have scalability and flexibility problems because they need completely configured space with a large number of sensors. To avoid the problems, we proposed a self-organizing location estimation method that uses ad hoc networks and Self-Organizing Maps and needs no prepared space with a large number of sensors. But, as in other similar precise localization methods, the proposed method needs advanced distance measurements unavailable to conventional wireless communication systems. In this paper, the self-organizing location estimation method's modification for distance measurement that uses received signal strength available to conventional wireless communication systems but which fluctuates uncertainly, is described and location estimation accuracy with the modified method is shown.