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Broadcast refresh of RFID tag persistence

  • US 9,330,284 B1
  • Filed: 10/12/2011
  • Issued: 05/03/2016
  • Est. Priority Date: 04/18/2011
  • Status: Active Grant
First Claim
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1. An RFID reader configured to communicate with a plurality of RFID tags, the reader comprising:

  • a transceiver; and

    a processor block coupled to the transceiver, the processor block configured to;

    transmit a broadcast command including an indicator field, a first command code, and a mask field, wherein;

    a first value for the indicator instructs the plurality of RFID tags to execute an operation specified by the first command code and the mask field; and

    a second value for the indicator instructs the plurality of RFID tags to ignore the first command code, interpret at least a portion of the mask field as a second command code, and perform a second operation specified by the second command code, wherein;

    if the second command code specifies a refresh operation, then the plurality of RFID tags are instructed to perform the refresh operation; and

    if the second command code specifies another operation, then the plurality of RFID tags are instructed to perform the other operation using a data field, the data field included in the broadcast command and associated with the second command code.

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