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Device Whispering: An Approach for Directory-Less WLAN Positioning

  • Karl-Heinz Krempels
  • Sebastian Patzak
  • Janno von Stülpnagel
  • Christoph Terwelp
Part of the Communications in Computer and Information Science book series (CCIS, volume 130)

Abstract

A widely-used positioning system for mobile devices is GPS. It is based on transit times of signals from satellites, so it provides accurate positioning in outdoor scenarios. But in indoor scenarios it is not usable because the signals are absorbed by buildings. To provide positioning services indoors several approaches exist which use for example GSM (Global System for Mobile Communication) or WLAN (Wireless Local Area Network) signals. GSM based systems not using special hardware are limited to identify the GSM-Cell the mobile device is in and associate it through a directory service with a geographical position. The fingerprinting approach is based on WLAN using signal strength vectors of multiple access points to approximate a position. But this method requires a huge number of measurements and only works reliable in laboratory environments. The approach discussed in this paper uses the WLAN radio of a mobile device to identify the nearest access point. Then the geographical position of the mobile device is calculated from the geo tags broadcasted by the access points. So the approach provides at least the same accuracy as directory-based positioning systems but does not require the maintenance and communication costs of a directory. The evaluation shows that the accuracy of this approach is limited by the abilities of hardware and drivers on todays mobile devices.

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References

  1. 1.
    Jan, R.H., Lee, Y.R.: An Indoor Geolocation System for Wireless LANs. In: Proceedings of 2003 International Conference on Parallel Processing Workshops, October 6-9, pp. 29–34 (2003)Google Scholar
  2. 2.
    Wallbaum, M., Spaniol, O.: Indoor Positioning Using Wireless Local Area Networks. In: IEEE John Vincent Atanasoff 2006 International Symposium on Modern Computing, JVA 2006, pp. 17–26 (October 2006)Google Scholar
  3. 3.
    Wallbaum, M.: Tracking of Moving Wireless LAN Terminals. In: 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004, September 5-8, vol. 2, pp. 1455–1459 (2004)Google Scholar
  4. 4.
    Yeung, W.M., Ng, J.K.: Wireless LAN Positioning based on Received Signal Strength from Mobile Device and Access Points. In: 13th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2007, August 21-24, pp. 131–137 (2007)Google Scholar
  5. 5.
    Kaemarungsi, K.: Distribution of wlan received signal strength indication for indoor location determination, p. 6 (January 2006)Google Scholar
  6. 6.
    Zhao, Y., Zhou, H., Li, M., Kong, R.: Implementation of indoor positioning system based on location fingerprinting in wireless networks, pp. 1–4 (October 2008)Google Scholar
  7. 7.
    Lin, T.N., Lin, P.C.: Performance comparison of indoor positioning techniques based on location fingerprinting in wireless networks, vol. 2, pp. 1569–1574 (June 2005)Google Scholar
  8. 8.
    Wallbaum, M., Diepolder, S.: Benchmarking Wireless LAN Location Systems Wireless LAN Location Systems. In: The Second IEEE International Workshop on Mobile Commerce and Services, WMCS 2005, July 19, pp. 42–51 (2005)Google Scholar
  9. 9.
    Liu, H., Darabi, H., Banerjee, P., Liu, J.: Survey of wireless indoor positioning techniques and systems. IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews 37(6), 1067–1080 (2007)CrossRefGoogle Scholar
  10. 10.
    Krempels, K.H., Krebs, M.: Directory-less WLAN Indoor Positioning. In: Proceedings of the IEEE International Symposium on Consumer Electronics 2008, Vilamoura, Portugal (2008)Google Scholar
  11. 11.
    Krempels, K.H., Krebs, M.: Improving Directory-Less WLAN Positioning by Device Whispering. In: Proceedings of the International Conference on Wireless Information Networks and Systems, Porto, Portugal (2008)Google Scholar
  12. 12.
    LAN MAN Standards Committee: ANSI/IEEE Std 802.11, 1999 Edition, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Standard (1999)Google Scholar
  13. 13.
    Chowaw-Liebman, O., Krempels, K.H., von Stülpnagel, J., Terwelp, C.: Indoor navigation using approximate positions. In: [15], pp. 168–171Google Scholar
  14. 14.
    Krempels, K.H., Patzak, S., von Stülpnagel, J., Terwelp, C.: Evaluation of directory-less wlan positioning by device whispering. In: [15], pp. 139–144Google Scholar
  15. 15.
    Obaidat, M.S., Caldeirinha, R.F.S. (eds.): Proceedings of the International Conference on Wireless Information Networks and Systems, WINSYS 2009, Milan, Italy, July 7-10 (2009); In: Obaidat, M.S., Caldeirinha, R.F.S. (eds.) WINSYS is part of ICETE - The International Joint Conference on e-Business and Telecommunications, WINSYS. INSTICC Press (2009)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Karl-Heinz Krempels
    • 1
  • Sebastian Patzak
    • 1
  • Janno von Stülpnagel
    • 1
  • Christoph Terwelp
    • 1
  1. 1.Informatik 4, Intelligent Distributed Systems GroupRWTH Aachen UniversityAachenGermany

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