Browsing by Author "Liu, Yen-Szu"

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A green positioning algorithm for Campus Guidance System
(2012)
Chen, Chi-Hua
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Lin, Bon-Yeh
;
Lin, Chun-Hao
;
Liu, Yen-Szu
;
Lo, Chi-Chun
In this paper, we propose a new CGS, called the Green Campus Guidance System (GCGS). The GCGS employs the Fingerprint Position Algorithm (FPA) using Received Signal Strength (RSS) from mobile stations/user equipment through cellular networks and Location-Based Services (LBSs) for user reference. In experiments, the results show that the error of location estimation using FPA is about 9.92 m. As to power consumption, the cost per sample of GPS is 27.68 times of that of FPA. Consequently, the FPA exerts itself as a green positioning algorithm, and thus can be used to support GCGS.
A Real-time Campus Guidance System Based on Energy Efficient Location Determination Method
(2011)
Lin, Chun-Hao
;
Liu, Yen-Szu
;
Chen, Chi-Hua
;
Lin, Bon-Yeh
;
Lo, Chi-Chun
Recently guidance system is becoming more popular, as more people realize its benefits. There have been many developments on campus guidance system (CGS) in personal digital assistant (PDA) and smart phone. The building and promotion of the energy efficient location determination method is an important part of CGS. The cellular-based location determination using RSS from cellular network is more immediately, power-effective, and easy to deploy and maintain than traditional methods. In this paper, we design the CGS which provides the fingerprint position algorithm (FPA) using RSS from cellular networks and location-based service (LBS) for user reference. In experiments, we compare the estimated positioning information with the real information from global position system (GPS) receiver. The results show that the error of location estimation using FPA is about 9.92 meters. This approach is feasible to be applied to CGS.