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Ahead-of-time scheduling of commands in RFID reader systems

  • US 8,427,315 B2
  • Filed: 08/23/2006
  • Issued: 04/23/2013
  • Est. Priority Date: 03/29/2006
  • Status: Active Grant
First Claim
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1. An operational processing block for an RFID reader, the RFID reader further including a buffer, the RFID reader used to communicate with at least one RFID tag according to a communication protocol, the operational processing block causing the RFID reader to cooperate with the at least one RFID tag to reduce latency within the reader-tag transaction, the operational processing block configured to:

  • transmit a first reader command;

    receive a tag response responsive to the first reader command;

    calculate a second reader command responsive to the tag response;

    transmit the second reader command;

    store the second reader command in the reader'"'"'s buffer;

    receive a tag response responsive to the second reader command;

    calculate a third reader command responsive to the tag response;

    store the third reader command in reader'"'"'s buffer;

    transmit the third reader command;

    receive a tag response;

    if the received tag response corresponds to the second reader command, transmit the second reader command originating from the reader'"'"'s buffer;

    orif the received tag response corresponds to the third reader command, transmit the third reader command originating from the reader'"'"'s buffer;

    orif the received tag response does not correspond to any reader command held in the reader'"'"'s buffer, calculate a reader command responsive to the tag response;

    transmit the reader command responsive to the tag response; and

    store the corresponding reader command in the reader'"'"'s buffer.

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