Tag grouping system and tag grouping method
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United States of America Patent
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Oct 13, 2009
Grant Date -
Sep 16, 2004
app pub date -
Feb 11, 2004
filing date -
Feb 25, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
To group ID tags distributed in a larger area than the coverage of a tag reader, a parameter which represents a measure of the strength of relationship among a plurality of ID tags is stored in a parameter storage database. Values of the parameter are increased and decreased according to the number of pieces of ID information detected simultaneously in the ID tags by a mobile tag reader. A plurality of ID tags are judged as belonging to the same group according to values of the parameter stored in the parameter storage database, thereby making it possible to group ID tags distributed in a larger area than the coverage of a tag reader.
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