A method of performing, by a user equipment (UE), uplink transmission in a wireless communication system. The method includes: receiving, from a base station (BS), a plurality of RRC configuration information related to downlink control information (DCI); receiving, from the BS, first DCI for the uplink transmission, wherein the first DCI includes a field related to a usage of the first DCI; applying parameters of a specific RRC configuration information, among the plurality of RRC configuration information, to the first DCI based on the usage of the first DCI indicated by the field of the first DCI, wherein based on a size of the field of the first DCI being smaller than a field size of second DCI for PUSCH transmission, the field of the first DCI is zero bit padded and decoded; and performing the uplink transmission to the BS based on the first DCI.