Methods and apparatus for error detection and correction of an electronic shelf label system communication error

  • US 20030135806A1
  • Filed: 01/11/2002
  • Published: 07/17/2003
  • Est. Priority Date: 01/11/2002
  • Status: Active Grant
First Claim
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1. A method of automatically detecting and correcting communication errors which result in an electronic shelf label'"'"'s (ESL'"'"'s) registers storing incorrect data, the method comprising the steps of:

  • (a) transmitting a message to the ESL by a host computer;

    (b) waiting for a response to the message;

    (c) if the response is a negative acknowledgement or no response is received by the host computer, retransmitting the message;

    (d) if the response appears to be a positive acknowledgement, transmitting a verification message to verify the contents of the ESL'"'"'s registers;

    (e) waiting for a response to the verification message; and

    (f) if the response to the verification message is positive acknowledgement, logging the message as successfully received.

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