System and method for radio frequency tag group select
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United States of America Patent
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Sep 30, 1997
Grant Date -
N/A
app pub date -
Sep 9, 1994
filing date -
Sep 9, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroup(s) of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.
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