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Method and apparatus for handling signpost signals in a tag

  • US 7,629,879 B2
  • Filed: 01/10/2006
  • Issued: 12/08/2009
  • Est. Priority Date: 01/10/2006
  • Status: Active Grant
First Claim
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1. An apparatus comprising a tag having circuitry that includes:

  • a receiver section configured to receive wireless signpost signals that each include a signpost code;

    a further section responsive to receipt by said receiver section of a signpost signal for saving information relating to the signpost that generated the signpost signal; and

    a transmitter section operable to transmit wireless tag signals that each include a tag code associated with said tag, said transmitter section being responsive to receipt by said receiver section of a signpost signal for including first and second information portions in at least one said tag signal, said first information portion relating to one signpost that generated the received signpost signal, and said second information portion relating to a further signpost that generated a preceding signpost signal received by said receiver section.

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