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Contactless proximity automated data collection system and method

  • US 6,480,101 B1
  • Filed: 07/28/2000
  • Issued: 11/12/2002
  • Est. Priority Date: 04/01/1996
  • Status: Expired due to Term
First Claim
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1. A method for exchanging data in a contactless proximity automated data collection system between a tag and a host computer, the method comprising the steps of:

  • transmitting an imawake message from the tag to the host computer;

    transmitting a first host message from the host computer to the tag in response to the imawake message, the first host message comprising one of a readpage message and a writepage message;

    determining whether the first host message is valid at the tag;

    transmitting a second tag message from the tag to the host computer if the first host message is valid, the second tag message comprising one of a sendingpage message if the first host message is a readpage message and an acknowledge message if the first host message is a writepage message; and

    transmitting a non-acknowledge message from the tag to the host computer if the first host message is invalid.

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