Apparatus and method for locating a terminal in a broadband...

Details Apparatus and method for locating a terminal in a broadband... Apparatus and method for locating a terminal in a broadband...

2007-12-27

2010-10-26

Phan, Dao L (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

C342S442000, C342S458000

Reexamination Certificate

active

07821458

ABSTRACT:
An apparatus and method for locating a terminal in a broadband wireless communication system are provided. The apparatus for locating the terminal includes a candidate region determiner, a virtual location determiner, and a final location determiner. The candidate region determiner determines a candidate region of the terminal by using tag signal arrival time information of the terminal provided from a plurality of readers. The virtual location determiner determines a virtual location of the terminal in the candidate region in consideration of a propagation delay of the tag signal. The final location determiner predicts a tag signal arrival time from the virtual location and determines the virtual location as the final location if a difference between the predicted tag signal arrival time and a measured tag signal arrival time is less than or equal to a threshold value. The apparatus and method provide a less expensive and less complex locating system.

REFERENCES:
patent: 10-2004-0092610 (2004-11-01), None
patent: 10-2007-0084848 (2007-08-01), None
patent: 10-0754548 (2007-08-01), None
patent: 02/059638 (2002-08-01), None

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