The present specification provides a method for transmitting, by a terminal, a message for execution of a random access procedure in a wireless communication system, the method comprising the steps of: receiving a system information block (SIB) from a base station; transmitting a first message, which is a random access preamble, to the base station on the basis of the SIB; receiving a second message, which is a response to the first message, from the base station; and transmitting a third message to the base station, using a carrier different from a carrier used to transmit the first message.
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