Method for transmitting control information, and apparatus therefor

A user equipment (UE) for controlling a transmit power in a wireless communication system, the UE comprising:

• a radio frequency (RF) unit;
• and
• a processor, wherein the processor is configured to
• configure a first cell group consisting of a primary cell (PCell) and zero or more secondary cells (SCells) and a second cell group consisting of one or more SCells,
• transmit a physical random access channel (PRACH) in the first cell group in a time unit #n,
• transmit a first Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) via a first physical uplink control channel (PUCCH) in the PCell in the time unit #n, and
• transmit a second HARQ-ACK via a second PUCCH in a predefined SCell of the second cell group in the time unit #n,
• wherein a transmit power of the first HARQ-ACK is determined based on a value satisfying CG1.AN.power and a transmit power of the second HARQ-ACK is determined based on a value satisfying CG2.AN.power:
• CG1.AN.power=min{(Pmax−PRACH.power−min(min{(Pmax−PRACH.power), CG2.AN.C-power}, CG2.AN.G-power)), CG1.AN.C-power}
• CG2.AN.power=min{(Pmax−PRACH.power−CG1.AN.power), CG2.AN.C-power}
• where min{A, B} indicates a smaller one of A and B, Pmax indicates a maximum transmit power of the UE, PRACH.power indicates a transmit power of the PRACH, CG1.AN.C-power indicates an original transmit power of the first HARQ-ACK, CG2.AN.C-power indicates an original transmit power of the second HARQ-ACK, and CG2.AN.G-power indicates a value related with power allocation.