Method and apparatus for dynamically assigning channel in asynchronous mobile communication system

Method and apparatus for assigning a channel dynamically in asynchronous mobile communication system are disclosed. The method for dynamically assigning a channel in asynchronous mobile communication system transmitting data packets from a base station to a plurality of mobile stations through a downlink shared channel (DSCH) transport channel, the method comprising the steps of: a) measuring a traffic volume of data packets for each of the mobile stations, wherein the data packets are inputted to the DSCH transport channel; b) determining whether the traffic volume of the data packets for each of the mobile stations is larger than a predetermined value; and c) if the traffic volume of the data packets for a mobile station is larger than the predetermined value, assigning a dedicated channel (DCH) transport channel to the mobile station in order to transmit a part of data packets for the mobile station via the DCH transport channel.