| 摘要 |
PURPOSE: A method for controlling a data rate in a high speed data transmission system is provided to inform an AT(Access Terminal) of a channel state by an AP(Access Point), and to synthetically predict all states of forward and reverse channels in the AT, thereby selecting an optimal data rate. CONSTITUTION: An AP(100) and an AT(200) exchange a pilot channel and an MAC channel(S601). The AP(100) predicts a reverse channel condition, and continuously updates a predicated value(S602), then continuously informs the AT(200) of the predicted channel condition(S603). The AT(200) continuously updates a C/I(Carrier/Interference) value based on the predicted value(S604), and predicts an optimal data rate, then determines a DRC(Data Rate Control) channel and an RRI(Reverse Rate Indicator)(S605). The AT(200) continuously requests to transmit data at an optimal rate(S606), and transmits an access channel with the use of a lower rate by one step(S607). The AT(200) transmits the data at an original rate, shows the rate on an RRI channel, and informs the AP(100) of the rate(S608).
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