Method and apparatus for indicating the location of an object

Details Method and apparatus for indicating the location of an object Method and apparatus for indicating the location of an object

2004-10-12

2009-08-18

Pan, Yuwen (Department: 2618)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456100, C455S456300, C455S041200, C455S457000, C455S456600

Reexamination Certificate

active

07577444

ABSTRACT:
A method of indicating the location of a relatively mobile object, comprising the steps of: (a) generating a first signal that is characteristic of a first, relatively immobile object; (b) transmitting the first signal from the first relatively immobile object; (c) detecting the first signal at a receiver; (d) generating a second signal that is characteristic of a second, relatively immobile object; (e) transmitting the second signal from the second, relatively immobile object; (f) detecting the second signal at a receiver; (g) generating a third signal that is characteristic of the relatively immobile object; (h) detecting the third signal at a receiver; (i) operating a processing device operatively connected to the receiver using signal time-of-flight (t-o-f) data and/or received signal strength information (RSSI) to establish the distance of the relatively mobile object respectively from the first and second relatively immobile objects; and (j) generating a signal indicating whether the relatively mobile object is for the time being closer to the first or the second relatively immobile object as the case may be.

REFERENCES:
patent: 6963283 (2005-11-01), Gonzalez
patent: 7006838 (2006-02-01), Diener et al.
patent: 2003/0146835 (2003-08-01), Carter
patent: 2008/0045235 (2008-02-01), Kennedy et al.
patent: WO0106401 (2001-01-01), None
Capkun et al, “GPS-free Positioning in Mobile Ad-Hoc Networks”, Proceedings of the 34th Hawaii International Conference on System Sciences, Jan. 3, 2001, pp. 1-10, XP008001836.

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