Method for performing random access channel procedure by terminal in unlicensed band and device therefor

A device for performing a random access procedure, the device comprising:

• at least one processor;
• and
• at least one memory operably connected to the at least one processor, and storing instructions that, based on being executed by the at least one processor, perform specific operations,
• wherein the specific operations comprise:
• transmitting a physical random access channel (PRACH) preamble based on a PRACH occasion through a message A;
• and
• receiving a random access response (RAR) through a message B, in response to the message A,
• wherein a single PRACH occasion is mapped to at least one physical uplink shared channel (PUSCH) occasion among multiple PUSCH occasions for the message A,
• wherein the multiple PUSCH occasions are separated by a specific gap in a time domain,
• wherein a window for detecting the message B starts at least one symbol after a last symbol of a PUSCH occasion corresponding to the PRACH preamble transmission.

A terminal for performing a random access procedure, the terminal comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor, and storing instructions that, based on being executed by the at least one processor, perform specific operations,
• wherein the specific operations comprise:
• transmitting a physical random access channel (PRACH) preamble based on a PRACH occasion through a message A to a base station;
• and
• receiving a random access response (RAR) through a message B from the base station, in response to the message A,
• wherein a single PRACH occasion is mapped to at least one physical uplink shared channel (PUSCH) occasion among multiple PUSCH occasions for the message A,
• wherein the multiple PUSCH occasions are separated by a specific gap in a time domain,
• wherein a window for detecting the message B starts at least one symbol after a last symbol of a PUSCH occasion corresponding to the PRACH preamble transmission.