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Method and system for contention resolution in radio frequency identification systems

  • US 20040142655A1
  • Filed: 01/05/2004
  • Published: 07/22/2004
  • Est. Priority Date: 08/17/2000
  • Status: Abandoned Application
First Claim
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1. A method for identifying a plurality of passive identification tags in a field of view, each tag having a respective identification value, and each tag having a register value within a predetermined range, the method comprising the following steps:

  • (a) splitting the predetermined range into a plurality of first sub-ranges;

    (b) for each first sub-range, requesting each tag whose register value falls within the first sub-range to communicate the tag'"'"'s identification value; and

    (c) in response to a determination that more than one tag has a register value within a given first sub-range, (i) splitting the given first sub-range into a plurality of second sub-ranges and (ii) for each second sub-range, requesting each tag whose register value falls within the second sub-range to communicate the tag'"'"'s identification value.

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