Abstract
Indoor positioning systems based on 802.11 and fingerprints offer reasonably low position errors. We study the deployment, calibration, and measurement factors for position errors by systematically investigating (1) the number of access points, (2) the number of samples in the training phase, (3) the number of samples in the position determination phase, and (4) the setup of the grid of reference points. Further, we bring out the best of the positioning system by selecting advantageous values for these parameters. For our study, we utilize a test environment with a size of about 312 square meters that is covered with 612 reference points arranged in an equally spaced grid.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Kaplan, E., Hegarty, C. (eds.): Understanding GPS: Principles and Applications, 2nd edn. Artech House Incorporated (2005)
Bahl, P., Padmanabhan, V.N.: RADAR: An In-Building RF-Based User Location and Tracking System. In: Proc. IEEE InfoCom, pp. 775–784 (2000)
Castro, P., Muntz, R.: Managing Context Data for Smart Spaces. IEEE Personal Communications, 44–46 (2000)
King, T., Haenselmann, T., Kopf, S., Effelsberg, W.: Overhearing the Wireless Interface for 802.11-based Positioning Systems. In: Proc. IEEE PerCom, pp. 145–150 (2007)
Youssef, M., Agrawala, A.: The Horus WLAN Location Determination System. In: Proc. ACM MobiSys, pp. 205–218 (2005)
King, T., Kopf, S., Haenselmann, T., Lubberger, C., Effelsberg, W.: COMPASS: A Probabilistic Indoor Positioning System Based on 802.11 and Digital Compasses. In: Proc. ACM WiNTECH, pp. 34–40 (2006)
Haeberlen, A., Flannery, E., Ladd, A.M., Rudys, A., Wallach, D.S., Kavraki, L.E.: Practical Robust Localization over Large-Scale 802.11 Wireless Networks. In: Proc. ACM MobiCom, pp. 70–84 (2004)
Ladd, A.M., Bekris, K.E., Rudys, A., Marceau, G., Kavraki, L.E., Wallach, D.S: Robotics-Based Location Sensing using Wireless Ethernet. In: Proc. ACM MobiCom, pp. 227–238 (2002)
Bahl, P., Padmanabhan, V.N.: Enhancements of the RADAR User Location and Tracking System. Technical Report MSR-TR-2000-12, Microsoft Research, Microsoft Corporation One Microsoft Way Redmond, WA 98052 (2000)
Youssef, M., Agrawala, A.: On the Optimality of WLAN Location Determination Systems. In: Proc. CNDS (2004)
Youssef, M., Agrawala, A., Shankar, A.U: WLAN Location Determination via Clustering and Probability Distributions. In: Proc. IEEE PerCom, pp. 143–150 (2003)
LaMarca, A., Chawathe, Y., Consolvo, S., Hightower, J., Smith, I., Scott, J., Sohn, T., Howard, J., Hughes, J., Potter, F., Tabert, J., Powledge, P., Borriello, G., Schilit, B.: Place Lab: Device Positioning Using Radio Beacons in the Wild. In: Proc. IEEE PerCom, pp. 116–133 (2005)
King, T., Lemelson, H., Haenselmann, T., Effelsberg, W.: Loc{lib,trace,eva,ana}: Research Tools for 802.11-based Positioning Systems. In: Proc. ACM WiNTECH (2007)
Bychkovsky, V., Hull, B., Miu, A., Balakrishnan, H., Madden, S.: A Measurement Study of Vehicular Internet Access Using In Situ Wi-Fi Networks. In: Proc. ACM MobiCom, pp. 50–61 (2006)
King, T., Kopf, S.: Loclib - A Location Library. Website (January 2007), http://www.informatik.uni-mannheim.de/pi4/projects/loclib/
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2007 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
King, T., Haenselmann, T., Effelsberg, W. (2007). Deployment, Calibration, and Measurement Factors for Position Errors in 802.11-Based Indoor Positioning Systems. In: Hightower, J., Schiele, B., Strang, T. (eds) Location- and Context-Awareness. LoCA 2007. Lecture Notes in Computer Science, vol 4718. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75160-1_2
Download citation
DOI: https://doi.org/10.1007/978-3-540-75160-1_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-75159-5
Online ISBN: 978-3-540-75160-1
eBook Packages: Computer ScienceComputer Science (R0)