Method and device for performing random access procedure in wireless communication system

A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:

• one or more transceivers;
• one or more processors;
• and
• one or more memories operationally connected to the one or more processors and storing instructions that, based on being executed by the one or more processors, perform operations comprising:
• receiving i) a Preamble Received Target Power for a preamble related to a 4-step Random Access (RA) type and ii) a msg3 Delta Preamble for a transmission of a Msg3 Physical Uplink Shared CHannel (PUSCH) related to the 4-step RA type;
• receiving i) a msgA Preamble Received Target Power for a MsgA preamble related to a 2-step RA type and ii) a msgA Delta Preamble for a transmission of a MsgA PUSCH related to the 2-step RA type;
• based on a random access procedure related to the 2-step RA type being initiated, transmitting the MsgA preamble and the MsgA PUSCH;
• and
• receiving a random access response (RAR) message,
• wherein the MsgA preamble is transmitted based on the msgA Preamble Received Target Power,
• wherein the MsgA PUSCH is transmitted based on a PUSCH transmission power, and
• wherein the PUSCH transmission power is determined based on i) a number of resource blocks for the transmission of the MsgA PUSCH, ii) the msgA Preamble Received Target Power, iii) the msgA Delta Preamble which is a power offset relative to the msgA Preamble Received Target Power, iv) a power control value related to a path loss (PL), and v) a power control value related to a transport format (TF).

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting i) a Preamble Received Target Power for a preamble related to a 4-step Random Access (RA) type and ii) a msg3 Delta Preamble for a transmission of a Msg3 Physical Uplink Shared CHannel (PUSCH) related to the 4-step RA type;
• transmitting i) a msgA Preamble Received Target Power for a MsgA preamble related to a 2-step RA type and ii) a msgA Delta Preamble for a transmission of a MsgA PUSCH related to the 2-step RA type;
• based on a random access procedure related to the 2-step RA type being initiated, receiving the MsgA preamble and the MsgA PUSCH;
• and
• transmitting a random access response (RAR) message,
• wherein the MsgA preamble is transmitted, by a user equipment (UE), based on the msgA Preamble Received Target Power,
• wherein the MsgA PUSCH is transmitted, by the UE, based on a PUSCH transmission power, and
• wherein the PUSCH transmission power is determined based on i) a number of resource blocks for the transmission of the MsgA PUSCH, ii) the msgA Preamble Received Target Power, iii) the msgA Delta Preamble which is a power offset relative to the msgA Preamble Received Target Power, iv) a power control value related to a path loss (PL), and v) a power control value related to a transport format (TF).