Dispatch system and method of assigning a shared channel to remote units
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United States of America Patent
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Jun 10, 2003
Issued Date -
N/A
app pub date -
Jan 21, 1998
filing date -
May 30, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A dispatch system (10) uses satellites (40) to broadcast simultaneously to an individual remote unit (30), to a select group of remote units (30) or to all the remote units (30). The dispatch system (10) may assign a remote unit (30) to a unique channel if there are enough available channels, or may assign the remote units (30) to a shared channel when the number of available channels is limited. The remote units (30) are given a unique control code or a shared control code. Based on the channel and the control code, the remote unit (30) will be able to listen to the broadcast or ignore it.
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