Method and system for identifying expired RFID data
First Claim
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1. A method of identifying expired RFID data comprising:
- storing a log entry associated with reading an RFID transponder by an RFID reader, the stored log entry comprising a tag ID, a reader identifier corresponding to the RFID reader, and a timestamp corresponding to a time at which the log entry is created;
monitoring the timestamp for each log entry with respect to an associated expiration value to determine whether the stored log entry has expired; and
if the log entry has expired, initiating an event to notify other system elements of the tag ID and reader identifier associated with the log entry determined to be expired and freeing storage occupied by the log entry determined to be expired.
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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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Citations
13 Claims
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1. A method of identifying expired RFID data comprising:
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storing a log entry associated with reading an RFID transponder by an RFID reader, the stored log entry comprising a tag ID, a reader identifier corresponding to the RFID reader, and a timestamp corresponding to a time at which the log entry is created; monitoring the timestamp for each log entry with respect to an associated expiration value to determine whether the stored log entry has expired; and if the log entry has expired, initiating an event to notify other system elements of the tag ID and reader identifier associated with the log entry determined to be expired and freeing storage occupied by the log entry determined to be expired. - View Dependent Claims (2, 3, 4)
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5. An apparatus for identifying expired RFID data comprising:
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storage for storing log entries associated with reading an RFID transponder by an RFID reader, the log entry comprising a tag ID, a reader identifier corresponding to the RFID reader, and a timestamp corresponding to a time at which the log entry is created; logic for monitoring the timestamp with respect to an associated expiration value to determine whether the stored log entry has expired; and logic for notifying other system elements of the tag ID and reader identifier associated with the log entry determined to be expired and for freeing storage occupied by the log entry determined to be expired. - View Dependent Claims (6, 7, 8, 9)
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10. A computer program product for identifying expired RFID data, the computer program product comprising a computer usable medium having
computer usable program code tangibly embodied therewith, the computer usable medium comprising: -
computer usable program code configured to store log entries associated with reading an RFID transponder by an RFID reader, the stored log entry comprising a tag ID, a reader identifier corresponding to the RFID reader, and a timestamp corresponding to a time at which the log entry is created; computer usable program code configured to monitor the timestamp with respect to an associated expiration value to determine whether the stored log entry has expired; and computer usable program code configured to notify other system elements of the tag ID and reader identifier associated with an expired log entry, and to free storage occupied by a log entry determined to be expired. - View Dependent Claims (11, 12, 13)
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Specification