Radio communication system
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United States of America Patent
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Jul 24, 2012
Grant Date -
N/A
app pub date -
Aug 2, 2000
filing date -
Aug 3, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio communication system has a random access channel for the transmission of data (214) from a secondary station to a primary station. Such a channel is intended for use by secondary stations having packets of data (214) to transmit to a primary station while not actually engaged in a call. The primary station transmits a random access channel availability (AV) message (302) once per frame to inform secondary stations about the resources currently available. Hence a secondary station can select a channel known to be free. If no channels are available the secondary station can avoid a wasted access attempt.
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