Method for controlling uplink transmission power in wireless communication system and device therefor

A method of controlling uplink transmission power for a terminal configured to support a plurality of cells having one or more transmission time interval (TTI) lengths or subcarrier spacings in a wireless communication system, the method comprising:

• calculating transmission power for an uplink transmission;
• and
• performing the uplink transmission for a first cell with the calculated transmission power,
• wherein a transient period for transmission power for the uplink transmission is placed outside a symbol for the uplink transmission.

A terminal configured to support a plurality of cells having one or more transmission time interval (TTI) lengths or subcarrier spacings in a wireless communication system, the terminal comprising:

• a transmitter and a receiver;
• and
• a processor configured to control the transmitter and the receiver,
• wherein the processor is configured to calculate transmission power for an uplink transmission, and to perform the uplink transmission for a first cell with the calculated transmission power, and
• wherein the calculated transmission power is allocated up to a maximum transmission power configured for the terminal in a symbol or a TTI which does not overlap with a symbol or a TTI of an uplink transmission for a second cell, or a symbol or a TTI of an uplink transmission having a TTI length or a subcarrier spacing different from a TTI length or a subcarrier spacing of the uplink transmission for the first cell.