Method and system of using active RFID tags to provide a...

Details Method and system of using active RFID tags to provide a... Method and system of using active RFID tags to provide a...

2007-02-13

2007-02-13

Pham, Toan N. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S010100, C340S870030

Reexamination Certificate

active

10978125

ABSTRACT:
The system of the present invention includes a large-zone RFID reader, a plurality of small-zone RFID readers, and a plurality of RFID tags. The large-zone RFID reader covers areas which are not covered by the small-zone RFID readers. The output power of the small-zone RFID readers is controlled by the large-zone RFID reader based on RFID tag operation patterns of the small-zone RFID readers. The system reliability is improved by a method that uses reliable RFID tags, RFID reader beacon signals, and RFID tag's repetitive transmitting signals to detect tag failures. The system security is provided by a method that uses integrated crypto engines in both the RFID tags and RFID readers.

REFERENCES:
patent: 6720888 (2004-04-01), Eagleson et al.
patent: 7030731 (2006-04-01), Lastinger et al.
patent: 2005/0270158 (2005-12-01), Corbett, Jr.

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