Title :
Bayesian based location estimation system using wireless LAN
Author :
Ito, Seigo ; Kawaguchi, Nobuo
Author_Institution :
Graduate Sch. of Inf. Sci., Nagoya Univ., Japan
Abstract :
Over the last few years, wireless LAN and location-based service has been a hot subject of controversy. In this paper, we propose a Bayesian-based location estimation system and a location-based application using existing wireless access points at a college campus. Our system uses signal strength of access points and a Bayesian inference to estimate a user´s location. Using this pre-observation model-based system and considering signal strength direction, a user can construct a location estimation system easily and obtain good location estimation accuracy. Furthermore, our system allows users to know his/her location whenever they want without beacons searched by a system administrator or an unknown person. We implemented the system and exemplified its effectiveness with experiments at our campus. Using this system, we also propose a location-based presence service system. By using this presence system, one can get the location of friends automatically.
Keywords :
belief networks; mobility management (mobile radio); wireless LAN; Bayesian inference; location estimation system; location-based application; location-based service; pre-observation model-based system; signal strength direction; user location; wireless LAN; wireless access points; Bayesian methods; Conferences; Educational institutions; Global Positioning System; Hardware; Indium tin oxide; Information science; Information technology; Radiofrequency identification; Wireless LAN;
Conference_Titel :
Pervasive Computing and Communications Workshops, 2005. PerCom 2005 Workshops. Third IEEE International Conference on
Print_ISBN :
0-7695-2300-5
DOI :
10.1109/PERCOMW.2005.19