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Method and system of using active RFID tags to provide a reliable and secure RFID system

  • US 7,176,797 B2
  • Filed: 10/29/2004
  • Issued: 02/13/2007
  • Est. Priority Date: 10/31/2003
  • Status: Expired due to Fees
First Claim
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1. A RFID system comprising:

  • at least one small-zone RFID reader to cover an area;

    a large-zone RFID reader to cover gaps among the at least one small-zone RFID reader within the area, andat least one active RFID tag,wherein the at least one active RFID tag first try to become associated with the at least one small-zone RFID reader and if the at least one active RFID tag cannot become associated with one of the at least one small-zone RFID reader, the at least one active RFID tag that cannot become associated with the small-zone RFID reader is associated with the large-zone RFID reader.

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