Infrastructure-Free Floor Localization Through Crowdsourcing

Mobile phone localization plays a key role in the fast-growing location-based applications domain. Most of the existing localization schemes rely on infrastructure support such as GSM, Wi-Fi or GPS. In this paper, we present FTrack, a novel floor localization system to identify the floor level in a...

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Bibliographic Details
Published in:Journal of computer science and technology 2015-11, Vol.30 (6), p.1249-1273
Main Author: 叶海波 顾涛 陶先平 吕建
Format: Article
Language:English
Subjects:
Artificial Intelligence
Buildings
Calibration
Cellular telephones
Computer Science
Computer simulation
Construction
Crowdsourcing
Data Structures and Information Theory
Elevators & escalators
Information Systems Applications (incl.Internet)
Infrastructure
Localization
Location-based services
Mapping
Position (location)
R&D
Regular Paper
Research & development
Sensors
Smartphones
Software Engineering
Tables (data)
Theory of Computation
Wi-Fi
地板高度
地面水
基础设施
多层建筑物
定位系统
移动用户
移动电话
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Summary:Mobile phone localization plays a key role in the fast-growing location-based applications domain. Most of the existing localization schemes rely on infrastructure support such as GSM, Wi-Fi or GPS. In this paper, we present FTrack, a novel floor localization system to identify the floor level in a multi-floor building on which a mobile user is located. FTrack uses the mobile phone＇s sensors only without any infrastructure support. It does not require any prior knowledge of the building such as floor height or floor levels. Through crowdsourcing, FTrack builds a mapping table which contains the magnetic field signature of users taking the elevator/escalator or walking on the stairs between any two floors. The table can then be used for mobile users to pinpoint their current floor levels. We conduct both simulation and field studies to demonstrate the eiTiciency, scalability and robustness of FTrack. Our field trial shows that FTrack achieves an accuracy of over 96% in three different buildings.
ISSN:1000-9000
1860-4749
DOI:10.1007/s11390-015-1597-z