Method for communication between central terminal and multiple transponders
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United States of America Patent
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Dec 13, 2005
Grant Date -
Mar 4, 2004
app pub date -
Aug 30, 2002
filing date -
Aug 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of communicating information from first and second transponders (or multiple transponders) to a central monitoring device, and a communications apparatus, are disclosed. The method includes receiving a starting indication at the transponders, determining start times for the transponders in response to that indication, and transmitting first and second sets of bursts from the first and second transponders, respectively. The bursts of the first set occur at at least some of a first set of potential transmission times within an interrogation period, and the bursts of the second set occur at at least some of a second set of potential transmission times during that period. Each of the potential transmission times of the burst sets are respectively determined in relation to the start times of the respective transponders. The potential transmission times of the respective burst sets are separated from one another by one of a bit-cell period and a multiple thereof.
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