RFID tag positional addressing
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United States of America Patent
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Sep 27, 2011
Grant Date -
Apr 22, 2010
app pub date -
Nov 10, 2008
filing date -
Oct 17, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a method and apparatus for radio frequency identification (RFID) tag positional addressing. A method in accordance with an embodiment of the present invention includes: activating a plurality of first RFID tags, wherein each first RFID tag emits an identification (ID) and a position; capturing the IDs and positions emitted by the first RFID tags using a plurality of second RFID tags, wherein each second RFID tag captures the IDs and positions emitted by the first RFID tags located in a vicinity of the second RFID tag, and wherein each second RFID tag determines its physical location based on the captured IDs and positions; and sending a read command including a position of a targeted one of the second RFID tags that is to be read, wherein only the targeted second RFID tag located at the position in the read command responds to the read command.
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