Patterson + Sheridan, LLP
Dynamic RFID tag singulation using state information masking
A method of interrogating a plurality of RFID tags comprises interrogating a first RFID tag with a read command comprising a masking value for a predefined portion of a User Memory Bank of the first RFID tag. The predefined portion stores state information for the first RFID tag. The masking value corresponds to a non-quiesced state relative to the read command interrogation. The method further comprises receiving a response from the first RFID tag that indicates that the first RFID tag is in the non-quiesced state. The method further comprises interrogating the first RFID tag with a write command that instructs the first RFID tag to write a predefined value to the predefined portion of the User Memory Bank, wherein writing the predefined value to the predefined portion places the first RFID tag in a quiesced state relative to a subsequent read command interrogation comprising the masking value.
Amazon Technologies, Inc.
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Oleg Mark G. Patrick Joshua David Tak Keung Joseph Roman Christopher Raymond David Bruce Fabien Alton Paul
Kantor McDonald Rubin Landry, Sr. Lui Shmulevich Grajewski McCalib, Jr. Lepoutre Werronen