Abstract: Disclosed is a method for controlling, by a base station, a flow in a wireless communication system. The method comprises the steps of: transmitting, to a terminal, an indicator indicating that the terminal is to enter an RRC inactive state; requesting a core network to interrupt at least a portion of the flow as the terminal enters the RRC inactive state; receiving uplink data from the terminal in the RRC inactive state; determining, on the basis of the uplink data, whether the terminal should enter an RRC connection state; and transmitting the uplink data to the core network according to the determination result.