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RFID systems

  • US 20090146812A1
  • Filed: 12/05/2007
  • Published: 06/11/2009
  • Est. Priority Date: 12/05/2007
  • Status: Active Grant
First Claim
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1. Method for RFID tracking comprising:

  • a) transmitting an RFID signal between a first RFID reader and a first group of passive RFID tags,b) receiving at the first RFID reader first data from the first group of passive RFID tags,c) transmitting said first data from the RFID reader to a gateway RFID tag,d) receiving and storing the first data at the gateway RFID tag,e) transmitting an RFID signal between a second RFID reader and a second group of passive RFID tags,f) receiving at the second RFID reader second data from the second group of passive RFID tags,g) transmitting said second data from the RFID reader to the gateway RFID tag,h) receiving and storing the second data at the gateway RFID tag,i) transmitting to the gateway RFID tag a query from the first RFID reader,j) receiving the query at the gateway RFID tag,k) transmitting second data from the gateway RFID tag to the first RFID reader.

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