1. A method for performing an uplink transmission in a wireless communication system by a terminal without beam correspondence, the method comprising,transmitting, to a base station (BS), at least one Uplink Reference Signal (UL RS);
receiving, from the BS, information related to an Uplink Transmission beam (UL Tx beam) of the terminal; and
transmitting, to the BS, a specific uplink channel through the UL Tx beam, based on the information,
wherein the UL Tx beam is determined among one or more UL Tx beams of the terminal by using the at least one UL RS,
wherein, when the terminal does not receive the information from the BS, the specific uplink channel is transmitted through a pre-determined UL Tx beam of the terminal, and
wherein, when the at least one UL RS is transmitted over a plurality of slots, the terminal is configured to receive, from the BS, information for prohibiting the transmission through the UL Tx beam before a beam procedure related to the at least one UL RS is terminated.