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METHOD FOR DETERMINING OPTIMAL FRAME SIZE FOR TAG COLLISION PREVENTION IN RFID SYSTEM

  • US 20110063085A1
  • Filed: 11/23/2009
  • Published: 03/17/2011
  • Est. Priority Date: 05/23/2007
  • Status: Active Grant
First Claim
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1. A method for determining an optimal frame size for tag collision prevention in a radio frequency identification (RFID) system in which frame sizes limited to a certain unit are used to identify tags, the method comprising the steps of:

  • (a) calculating, by an RFID reader, an estimated optimal frame value, the RFID reader identifying the tags;

    (b) calculating, by the RFID reader, expected time delays per tag of a left-hand frame size and a right-hand frame size, which show the smallest differences with respect to the estimated optimal frame value, among the frame sizes;

    (c) comparing, by the RFID reader, the expected time delay per tag of the left-hand frame size with that of the right-hand frame size; and

    (d) determining, by the RFID reader, a frame size which has a smaller expected time delay per tag, between the left-hand frame size and the right-hand frame size, to be an optimal frame size.

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