Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-12-12
2010-02-16
Afshar, Kamran (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456200, C370S328000
Reexamination Certificate
active
07664511
ABSTRACT:
The present invention provides a new and unique method and apparatus for providing an estimate of a mobile location of a wireless node, point or terminal in a wireless local area network (WLAN) or other suitable network, the estimate being based on a correlation of a radio frequency (RF) signal strength measurement and a grid point in a signal strength database or radio map. The signal strength database or radio map is built using a signal strength fingerprint algorithm. The signal strength fingerprint algorithm includes selecting and measuring a set of grid points in the wireless local area network (WLAN) or other suitable network.
REFERENCES:
patent: 2003/0235164 (2003-12-01), Rogers et al.
patent: 2005/0113107 (2005-05-01), Meunier
patent: 2005/0261004 (2005-11-01), Dietrich et al.
patent: 2006/0087425 (2006-04-01), Haeberlen et al.
patent: 2007/0026870 (2007-02-01), Spain et al.
patent: 2007/0042716 (2007-02-01), Goodall et al.
patent: WO 02/054813 (2002-07-01), None
patent: WO 2004/008795 (2004-01-01), None
Article “Estimating Signal Strengths in the Design of an Indoor Wireless Network” by A. Hills, et al in IE Transactions on Wireless Communications vol. 3 No. 1 2004 pp. 17-19.
Article “Accepted From Open Call—Rollabout: A Wireless Design Tool” by A. Hills, et al. in IEEE Communications Magazine, Feb. 2004, pp. 132-138.
Article “Location Determination of a Mobile Device Using IEEE 802.11b Access Point Signals” by S. Saha, et al. pp. 1987-1992, IEEE 2003.
Article “Radar: An In-Building RF-Based User Location and Tracking System” by P. Bahl, et al., IEEE Infocom 2000.
Article “Stepwise Refinement Algorithms for Prediction of User Location Using Receive Signal Strength Indication WLANs” by T. Deasy, et al. pp. 116-119, IEEE 2003.
Green Marilynn P.
Wang Shu-Shaw
Afshar Kamran
Nokia Corporation
LandOfFree
Mobile location method for WLAN-type systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile location method for WLAN-type systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile location method for WLAN-type systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4189476