Communication methods, systems, apparatus, and devices involving RF tag registration
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United States of America Patent
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Apr 22, 2008
Grant Date -
Apr 6, 2006
app pub date -
Sep 24, 2004
filing date -
Sep 24, 2004
priority date (Note) -
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Abstract
One technique of the present invention includes a number of Radio Frequency (RF) tags that each have a different identifier. Information is broadcast to the tags from an RF tag interrogator. This information corresponds to a maximum quantity of tag response time slots that are available. This maximum quantity may be less than the total number of tags. The tags each select one of the time slots as a function of the information and a random number provided by each respective tag. The different identifiers are transmitted to the interrogator from at least a subset of the RF tags.
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