System and method to identify multiple RFID tags
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United States of America Patent
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Mar 7, 2006
Issued Date -
N/A
app pub date -
Oct 2, 2002
filing date -
Oct 2, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An RFID system comprises an RFID reader configured to issue an RF command requesting that RF tags identify themselves, and to issue timing information defining a plurality of timeslots; and a plurality of RF tags in selective communication with the reader, the RF tags having respective IDs, respective tags being configured to randomly select a timeslot in which to reply to the RF command, and to issue an RF reply in response to the RF command in the randomly selected timeslot, the RF reply including a frequency pattern to assist in identifying the tag but not the tag's entire ID, different tags having different frequency patterns.
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