Method and system for identifying expired RFID data

Details Method and system for identifying expired RFID data Method and system for identifying expired RFID data

2007-07-02

2009-11-10

Pham, Toan N (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S572100, C340S010500

Reexamination Certificate

active

07616093

ABSTRACT:
For reducing the frequency with which RFID transponders are read in an RFID system, the RFID system logs a timestamp associated with each read of an RFID transponder along with the tag ID and reader identifier. The timestamp associated with each log entry is monitored with respect to an expiration value so that expired log entries may be identified. When a log entry is determined to be expired, other elements of the RFID system are notified of the associated tag ID and reader identifier, and the storage occupied by the expired log entry is freed.

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