Method for performing random-access channel procedure by terminal in wireless communication system, and device therefor

An apparatus configured to perform a random access channel (RACH) procedure in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
• transmitting a first physical random access channel (PRACH) preamble based on a RACH occasion and a Physical Uplink Shared Channel (PUSCH) occasion;
• detecting a Physical Downlink Control Channel (PDCCH) related to a random access response (RAR) within a time window;
• wherein based on that the first PRACH preamble is a PRACH preamble not mapped to the PUSCH occasion, the time window is started after the RACH occasion related to the transmission of the first PRACH preamble.

A method of performing a random access channel (RACH) procedure by a base station (BS) in a wireless communication system, the method comprising:

• receiving a first physical random access channel (PRACH) preamble from a user equipment (UE) based on a RACH occasion and a Physical Uplink Shared Channel (PUSCH) occasion;
• and
• transmitting a Physical Downlink Control Channel (PDCCH) related to a random access response (RAR) to the UE,
• wherein based on that the first PRACH preamble is a PRACH preamble not mapped to the PUSCH occasion, a transmission timing of the PDCCH is determined based on a time window starting after the RACH occasion related to the reception of the first PRACH preamble.

A base station (BS) configured to perform a random access channel (RACH) procedure in a wireless communication system, the BS comprising:

• at least one processor;
• and
• at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving a first physical random access channel (PRACH) preamble from a user equipment (UE) based on a RACH occasion and a Physical Uplink Shared Channel (PUSCH) occasion;
• and
• transmitting a Physical Downlink Control Channel (PDCCH) related to a random access response (RAR) to the UE,
• wherein based on that the first PRACH preamble is a PRACH preamble not mapped to the PUSCH occasion, a transmission timing of the PDCCH is determined based on a time window starting after the RACH occasion related to the reception of the first PRACH preamble.