THE ACCURACY OF ALGORITHMS FOR WLAN INDOOR POSITIONING AND THE STANDARDIZATION OF SIGNAL RECEPTION FOR DIFFERENT MOBILE DEVICES
DOI:
https://doi.org/10.47839/ijc.6.1.432Keywords:
WLAN, RSSI, Positioning, Bayes, Euclidian distance, Triangulation, IsolineAbstract
Often mobile devices like mobile phones or personal digital assistants (PDA) are equipped with IEEE 802.11 WLAN adapters. Furthermore, within many buildings a WLAN infrastructure is available. The aim of this work is to investigate the quality of different indoor positioning methods based on values of WLAN received signal strength index (RSSI) using commercially available devices (mobile phones, PDA). Three positioning algorithms were considered: minimal Euclidian distance, intersections of RSSI-Isolines and a stochastic model based on Bayes' theorem. Two measuring testbeds, a museum's exhibition room and an empty seminar room, four different types of PDA (Dell, Fujitsu, HP, T-Mobile) and two types of access points (Netgear, Lancom) were used. Results show that positioning can be achieved with an average accuracy of approx. 2-3 metres. WLAN capable mobile devices behave differently in receiving RSSI values of a base station. For reasons of standardization a linear correlation between different receiving levels of PDA was investigated.References
Rerrer, U.; Kao, O.: Suitability of Positioning Techniques for Location-based Services in wireless LANs, Proceedings of the 2nd Workshop "On Positioning, Navigation And Communication (WPNC05)", Hannover, 17 Mach 2005, pp. 51-56
Ladd, A. M.; Bekris, K. E.; Rudys, A.; Kavraki, L. E.; Wallach, D. S.: Robotics-based location sensing using wireless Ethernet, Wireless Networks, 11 (1-2) (2005), pp. 189 - 204
Retscher, G.; Moser, E.; Vredeveld, D.; Heberling, D.; Performance and Accuracy Test of the WLAN Indoor Positioning System "ipos"; Proceedings of the 3nd Workshop "On Positioning, Navigation And Communication (WPNC06)", Hannover, 16 March 2006, pp. 7-15
Teuber A.; Eisfeller B.; WLAN Indoor Positioning Based on Euclidian Distances and Fuzzy Logic; Proceedings of the 3nd Workshop "On Positioning, Navigation And Communication (WPNC06)", Hannover, 16 March 2006, pp. 159-168
Ekahau; Ekahau Positioning Engine 2.0; 802.11 based Wireless LAN positioning system; An Ekahau Technology document, 2002
Grossmann, U.; Rohrig, C.; Hakobyan, S.; Domin, T.; Dalhaus, M.: WLAN indoor positioning based on Euclidian distance and interpolation (isobars), Wireless Technologies (Hrsg. Wollert, Jorg), Fortschritt-Berichte VDI, Reihe 10 Nr. 772, Dortmund, 27-28 September 2006, S.296-305
Rohrig, C.; Kunemund, F.: Mobile Robot Localization using WLAN Signal Strengths; Personal Communication, 2006
Klein, R; Algorithmische Geometrie, Addison-Wesley, Bonn, 1997.
Chatterjee, Price; Praxis der Regressions-analyse, Oldenbourg, 1995.
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