Method for transmitting or receiving physical uplink shared channel for random access in wireless communication system and apparatus therefor

A user equipment (UE) configured to transmit a physical uplink shared channel (PUSCH) for random access in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory functionally connected to the at least one processor, and storing instructions for performing operations,
• wherein the operations includes:
• transmitting a preamble included in a first subgroup among the first subgroup and a second subgroup for dividing a plurality of preambles to a base station;
• and
• transmitting the PUSCH associated with the preamble to the base station,
• wherein the preamble and the PUSCH are included in message A (MsgA),
• wherein the first subgroup is determined based on the MsgA payload size.

A processing apparatus configured to control a user equipment (UE) to transmit a physical uplink shared channel (PUSCH) for random access in a wireless communication system, the processing apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
• transmit a preamble included in a first subgroup among the first subgroup and a second subgroup for dividing a plurality of preambles to a base station;
• and
• transmit the PUSCH associated with the preamble to the base station,
• wherein the preamble and the PUSCH are included in message A (MsgA),
• wherein the first subgroup is determined based on the MsgA payload size.