Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-09-18
2007-09-18
Mehrpour, Naghmeh (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S435100
Reexamination Certificate
active
10776588
ABSTRACT:
A method and apparatus are disclosed for estimating the location of a wireless terminal across multiple building floors. The illustrative embodiment determines the floor where the wireless terminal is presently located by using a majority logic-based heuristic. A plurality of signal monitors measure signals from the wireless terminal and provide those signal strength measurements to a location estimation server. Alternatively, the wireless terminal measures signals that are transmitted by a plurality of transmitting signal devices and provides those signal strength measurements to a location estimation server. The location estimation server determines the floor of the wireless terminal in accordance with the illustrative embodiment of the present invention.
REFERENCES:
patent: 6119009 (2000-09-01), Baranger et al.
patent: 6393294 (2002-05-01), Perez-Breva et al.
patent: 6664925 (2003-12-01), Moore et al.
patent: 2003/0129992 (2003-07-01), Koorapaty et al.
patent: 2003/0222820 (2003-12-01), Karr et al.
patent: 2004/0097229 (2004-05-01), Muhonen et al.
patent: 2004/0203904 (2004-10-01), Gwon et al.
patent: 2004/0219915 (2004-11-01), Bamburak et al.
patent: 1 359 714 (2003-11-01), None
patent: WO-00/50918 (2000-08-01), None
patent: WO-03/021851 (2003-03-01), None
Paramvir Bahl et al., “RADAR: An In-Building RF-based User Location and Tracking System,” Proceedings of IEEE Infocom 2000, Tel Aviv, Israel, Mar. 2000.
Paramvir Bahl et al., “Enhancements to the RADAR User Location and Tracking System,” Microsoft Research Technical Report, Redmond, WA, Feb. 2000.
Thomas W. Christ et al., “A Prison Guard Duress Alarm Location System,” Proc. IEEE International Carnahan Conference on Security Technology, Oct. 1993.
Andrew M. Ladd et al., “Robotics-Based Location Sensing using Wireless Ethernet,” The Eigthth ACM International Conference on Mobile Computing and Networking (MOBICOM), Atlanta, GA, Sep. 2002.
P. Prasithsangaree et al., “On Indoor Position Location with Wireless LANs,” The 13th IEEE Int'l Symposium on Personal, Indoor, and Mobile Radio Commun., Lisbon, Portugal, Sep. 2002.
Siddartha Saha et al., “Location Determination of a Mobile Device Using IEEE 802.11b Access Point Signals,” IEEE Wireless Comm. and Networking Conf. 2003, New Orleans, Louisana, Mar. 2003.
Asim Smailagic et al., “Location Sensing and Privacy in a Context Aware Computing Environment,” Pervasive Computing, 2001.
Moustafa Youssef et al., “WLAN Location Determinaiton via Clustering and Probability Distributions,” IEEE Int'l Conf. on Pervasive Computing and Comm. 2003. Fort Worth, TX, Mar. 2003.
Krishnakumar Anjur Sundaresan
Krishnan P
Avaya Technology Corp.
Mehrpour Naghmeh
LandOfFree
Location estimation of wireless terminals in a multi-story... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Location estimation of wireless terminals in a multi-story..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Location estimation of wireless terminals in a multi-story... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3774785