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Detecting activity of RFID objects via multiple tags/readers

  • US 20060092040A1
  • Filed: 11/02/2004
  • Published: 05/04/2006
  • Est. Priority Date: 11/02/2004
  • Status: Abandoned Application
First Claim
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1. An apparatus, comprising a device to determine an indication of movement of an object, the object comprising a first radio frequency identification (RFID) tag, based on a change in successive values of a first parameter, the values of the first parameter to be determined by:

  • receiving a first quantity of responses from the first RFID tag by a first RFID reader during a first time period;

    deriving the value of the first parameter, the value indicative of the first quantity; and

    repeating the operations of receiving the first quantity and deriving the value of the first parameter to determine additional ones of the values for time periods successive to the first time period.

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