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Journal of Applied Geodesy

Editor-in-Chief: Kahmen, Heribert / Rizos, Chris

4 Issues per year


CiteScore 2016: 1.09

SCImago Journal Rank (SJR) 2016: 0.367
Source Normalized Impact per Paper (SNIP) 2016: 0.908

Online
ISSN
1862-9024
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Volume 11, Issue 3

Issues

Wi-Fi location fingerprinting using an intelligent checkpoint sequence

Günther Retscher
  • Corresponding author
  • Department of Geodesy and Geoinformation, TU Wien – Vienna University of Technology, Vienna, Austria
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hannes Hofer
Published Online: 2017-02-14 | DOI: https://doi.org/10.1515/jag-2016-0030

Abstract

For Wi-Fi positioning location fingerprinting is very common but has the disadvantage that it is very labour consuming for the establishment of a database (DB) with received signal strength (RSS) scans measured on a large number of known reference points (RPs). To overcome this drawback a novel approach is developed which uses a logical sequence of intelligent checkpoints (iCPs) instead of RPs distributed in a regular grid. The iCPs are the selected RPs which have to be passed along the way for navigation from a start point A to the destination B. They are twofold intelligent because of the fact that they depend on their meaningful selection and because of their logical sequence in their correct order. Thus, always the following iCP is known due to a vector graph allocation in the DB and only a small limited number of iCPs needs to be tested when matching the current RSS scans. This reduces the required processing time significantly. It is proven that the iCP approach achieves a higher success rate than conventional approaches. In average correct matching results of 90.0% were achieved using a joint DB including RSS scans of all employed smartphones. An even higher success rate is achieved if the same mobile device is used in both the training and positioning phase.

Keywords: Wi-Fi; location fingerprinting; training phase; intelligent checkpoints (iCPs); logical sequence

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About the article

Received: 2016-07-12

Accepted: 2017-01-26

Published Online: 2017-02-14

Published in Print: 2017-09-26


Citation Information: Journal of Applied Geodesy, Volume 11, Issue 3, Pages 197–205, ISSN (Online) 1862-9024, ISSN (Print) 1862-9016, DOI: https://doi.org/10.1515/jag-2016-0030.

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