Radio frequency identification system with write broadcast capability
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United States of America Patent
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Nov 10, 2009
Grant Date -
Apr 28, 2005
app pub date -
Jul 26, 2004
filing date -
Sep 9, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A Write Broadcast system and method uses a base station to write sent data to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the remaining tags in the field (or sub group), the system determines, by receiving a response to the request, that there are tags in the field (sub group) that were unsuccessfully written to. Another Write Broadcast signal is sent to these tags. The system is useful for quickly (simultaneously) “stamping” information on the tag memory of a large number of tags in the field of the base station.
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