Tag system with anti-collision features
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United States of America Patent
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Sep 24, 2002
Grant Date -
N/A
app pub date -
Mar 23, 1999
filing date -
Mar 23, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
In a system of communicating between a master communication device and a plurality of slave communication devices, the master determines if any of the plurality of slave devices exist within a defined geographic area and, if so sends a bit-by-bit command for the slaves to identify themselves via a unique binary identification number. To avoid collision when the slaves respond, the slaves respond to the master's command within a predetermined period of a time window providing the ID bit by bit. Responses are acknowledged by the master such that only one slave is able to respond with its compute full ID after a bit-by-bit command from the master.
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