The present disclosure relates to a method of transmitting a Random Access (RA) preamble by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of receiving information related to at least two RA resource sets including a first RA resource set and a second RA resource set from a network; receiving pause information indicating whether the first RA resource set is available or not; and performing a RA procedure related to the first RA resource set using one RA resource set determined among the at least two RA resource sets based on the pause information.