Patent ID: 7339898

Claim:
A method for controlling data transmission rate of a mobile communication system, wherein a base transmission station system transmits and receives data so as to transmit data received from an upper node to a mobile station, comprising: (a) comparing an amount of data received from the upper node with a prescribed threshold, and adjusting a data transmission rate depending on a result of said comparison, comprising: assigning an additional wireless channel to increase the data transmission rate if data is received from an upper node and the amount of received data is greater than an up threshold; canceling an assigned wireless channel to decrease the data transmission rate if the amount of the received data is less than a down threshold; and maintaining the data transmission rate if the amount of the received data is between the up threshold and the down threshold; (b) computing a negative acknowledgment rate (NAK RATE) based on the increase or decrease of the data transmission rate when the data is transmitted or received; and (c) comparing the computed NAK RATE with a prescribed threshold, and increasing or decreasing the data transmission rate depending on a result of said NAK RATE comparison.