There is provided a data transmitting method in a CDMA system. In the CDMA
system, a control hold state and an active state are set for data
transmission between a mobile station and a base station. The control hold
state is entered to transmit a control signal on a dedicated control
channel and the active state is divided into a low rate transmission
substate for transmitting a small amount of data on the dedicated control
channel or/and a fundamental channel and a high rate transmission substate
for transmitting a large amount of data on a supplemental channel and on
at least one of the dedicated control channel and the fundamental channel.
When a large amount of user data is generated in the mobile station, the
mobile station generates a supplemental channel request message including
supplemental channel request information needed to transit from the
control hold state to the high rate transmission substate without
interposition of the low rate transmission substate and state transition
information needed to transit from the control hold state to the active
state, and transmits the supplemental channel request message to the base
station.
