Collaborative Filtering for Position Estimation Error Correction in WLAN Positioning Systems

Shigeaki TAGASHIRA  Yuhei KANEKIYO  Yutaka ARAKAWA  Teruaki KITASUKA  Akira FUKUDA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.3   pp.649-657
Publication Date: 2011/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.649
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication Technologies for Next-generation Mobile Multimedia Life)
Category: 
Keyword: 
position estimation errors,  user correction,  positioning system,  wireless LAN,  

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Summary: 
A critical problem with wireless LAN-based positioning systems is the degradation in position estimation accuracy due to complex variation in the strength of the received signal, which originates in the nature of the underlying wireless channel. Handling such variation effectively is essential for the creation of practical wireless LAN-based positioning systems. In this paper, we propose a collaborative mechanism for correcting position estimation errors. The main objective is to assist users in correcting estimation errors manually by providing access to a shared body of accumulated information on corrections made by many other users. In particular, the mechanism is designed to enable any group of users to collaboratively build upon this body of information. Finally, we evaluate the effectiveness of the proposed mechanism through experiments. The results confirm that the proposed mechanism can provide effective estimation error correction in a realistic environment.