Brief Description
The goal of this project is to determine the position of mobile devices (personal digital assistants and smartphones) and the position and orientation of mobile robots within buildings. In addition to other indoor positioning technologies and methods—such as signal transit time measurement, which requires additional hardware investments—measuring the signal strength of multiple access points is a viable approach. By analyzing the attenuation of signal strength as the distance from the transmitter increases, the project seeks to obtain information about the device’s position and orientation. There are various approaches and mathematical and statistical methods, which the authors have adapted or developed anew. To remain compatible with existing Wi-Fi installations, the Wi-Fi hardware and system software used were not modified. For the methods under investigation, measurement series were conducted in different measurement environments and compared with one another. In the following, the methods under investigation are first presented, followed by a presentation of the results of the measurement experiments.
Time period
2006 – 2007
Project Managers
Third-Party Funding
Internal University Research Funding (HIFF)
Participating Companies/Partners
- RWE-Museum “Strom und Leben”, Recklinghausen
Employees
- Dipl.-Inform. Markus Schauch
- Mathias Dalhaus (cand .inf.)
- Thomas Domin (cand .inf.)
- Frank Künemund (cand. inf)
Publications
- Grossmann, U.; Schauch, M.; Hakobyan, S.; Dalhaus, M.: RSSI-basierte WLAN-Ortung mit PDA (Personal Digital Assistant) innerhalb von Gebäuden, In: Wireless Communication and Information – New Technologies and Applications (Hrsg. J. Sieck, M.A. Herzog), 2008, vwh, pp 223-237
- Grossmann, U.; Schauch, M.; Hakobyan, S.: The accuracy of algorithms for WLAN indoor positioning and the standardization of signal reception for different mobile devices, International Journal of Computing, Vol . 6 (2007), Issue 1, pp 103-109
- Grossmann, U.; Schauch, M.: RSSI based WLAN indoor positioning with personal digital assistants, in: Proceedings of the 4th IEEE Workshop on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications IDAACS 2007, (Ed. Sachenko, A), pp. 653 – 656; 2007
- Röhrig, C.; Künemund, F.: Mobile Robot Localization using WLAN Signal Strengths, in: Proceedings of the 4th IEEE Workshop on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications IDAACS 2007, (Ed. Sachenko, A), S. 704-709, 2007
- Großmann U., Röhrig C., Hakobyan S., Domin T., Dalhaus M.: WLAN indoor positioning based on Euclidian distance and interpolation (isobars), 8. Wireless Technologies Kongress, Dortmund, Deutschland, September 2006, (Fortschritt-Berichte VDI : Reihe 10, Informatik/Kommunikation; Nr. 772), S. 296-305
Area of Expertise
Mobile Application and Services