A method for obtaining status information buffer user equipment in a base station in a mobile communication system that communicates through a plurality of orthogonal subcarriers, wherein the user equipment is in a state in which data transmission from the user equipment is performed based planning from the base station, the method comprising: receiving (S342), by the base station, an information signal of a bit from the user equipment through a physical channel dedicated uplink specific, where the signal is used to report the presence of a resource request uplink channel; transmitting (S344) by the base station, first information resource allocation for a first uplink channel to the user equipment after receiving the signal; and receiving (S345) by the base station status information buffer from the user equipment through the first uplink channel using the first information resource allocation.