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http://dx.doi.org/10.15207/JKCS.2020.11.3.037

A User's Location Localization Method using Smartphone Sensor on a Subway  

Cho, Jung-Gil (Department of Computer Engineering, Sungkyul University)
Publication Information
Journal of the Korea Convergence Society / v.11, no.3, 2020 , pp. 37-43 More about this Journal
Abstract
Smartphone-based localization has been widely studied in many different scenarios. But as far as we know, few work has addressed the problem of localization in underground public transportation systems, where GPS signal and wireless infrastructure are not always available. Knowing the location of a train is necessary to develop a useful service for subway passengers. And so, estimation of motion state and stop station by using sensors on a smartphone is being studied for subway passengers. This paper proposes a localization method that uses a barometer and a magnetic sensor on a smartphone. The method proposed in this paper first estimates whether the train runs or stops according to the change in air pressure and the strength of the magnetic field. The altitude value and the magnetic field value are then used to estimate the exact stop station of the train. We evaluated the proposed method using data from the Seoul's subway line 5. Compared with previous methods, the proposed method achieves higher accuracy.
Keywords
Barometer; Magnetic Sensor; Localization; Subway; Smartphone Sensor;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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