Method and apparatus for controlling transmission power of ue in wireless communication system

A user equipment (UE) for transmitting a physical uplink shared channel (PUSCH), the UE comprising:

• memory;
• a transceiver;
• and
• at least one processor coupled with the memory and the transceiver, and configured to:
• identify whether a demodulation reference signal (DMRS) time domain bundling information is included in a radio resource control (RRC) message received from a base station,
• determine, based on a result of identification, whether to transmit at least one PUSCH with a same transmission power for at least one transmission time domain window,
• in response to determining to transmit the at least one PUSCH with the same transmission power for the at least one transmission time domain window, determine a transmission power for the at least one PUSCH, and
• transmit the at least one PUSCH with the determined transmission power.

A method of a base station for receiving a physical uplink shared channel (PUSCH), the method comprising:

• transmitting, to a user equipment (UE), a radio resource control (RRC) message including a demodulation reference signal (DMRS) time domain bundling information;
• receiving at least one PUSCH transmitted by the UE with a transmission power determined based on the RRC message;
• and
• estimating a channel by bundling a DMRS of the at least one PUSCH.