Reverse infrastructure location system and method

Details Reverse infrastructure location system and method Reverse infrastructure location system and method

2008-07-22

2008-07-22

Bugg, George A (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S539130, C340S870030, C340S988000, C342S357490, C342S357490, C455S456100, C455S456300, C235S385000, C235S386000, C235S491000, C235S492000, C700S214000, C700S225000, C701S023000, C701S024000

Reexamination Certificate

active

07403120

ABSTRACT:
Methods and apparatus are provided to locate a terminal within a workspace. Radio frequency identification (RFID) tags are provided in known locations, preferably in, on or adjacent the light fixtures or other workspace infrastructure. The terminal comprises an RFID tag interrogation transceiver, processor and memory. The transceiver interrogates the tags which respond with information correlatable with their unique locations. The terminal determines its locations relative to the known locations of responding tags by, for example, varying its transmit power and/or receiver sensitivity and/or by trilateration using, for example, phase or time difference of arrival measurements on the tag response signals. Once it has determined its own location it may transmit or otherwise announce its location as desired by the user. In a preferred embodiment, the natural electromagnetic radiation and/or RADAR cross section backscatter from fluorescent type fixtures, modulated with their position information, acts as the RFID infrastructure beacon.

REFERENCES:
patent: 5260694 (1993-11-01), Remahl
patent: 5300875 (1994-04-01), Tuttle
patent: 5646616 (1997-07-01), Komatsu
patent: 5796362 (1998-08-01), Ayasli et al.
patent: 5917425 (1999-06-01), Crimmins et al.
patent: 5974368 (1999-10-01), Schepps et al.
patent: 6396413 (2002-05-01), Hines et al.
patent: 6414626 (2002-07-01), Greef et al.
patent: 6542270 (2003-04-01), Perkins et al.
patent: 6563417 (2003-05-01), Shaw
patent: 6750769 (2004-06-01), Smith
patent: 6865347 (2005-03-01), Perkins et al.
patent: 6868073 (2005-03-01), Carrender
patent: 6900762 (2005-05-01), Andrews et al.
patent: 6922173 (2005-07-01), Anderson
patent: 6992581 (2006-01-01), Reisman et al.
patent: 7030761 (2006-04-01), Bridgelall et al.
patent: 7119738 (2006-10-01), Bridgelall et al.
patent: 7151979 (2006-12-01), Andersen et al.
patent: 2005/0140507 (2005-06-01), Nam et al.
patent: 2005/0200477 (2005-09-01), Lindero
patent: 2006/0022038 (2006-02-01), Hewlin et al.

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