A disclosure of the present specification provides a method for determining transmission power of an uplink channel. The method may comprise the steps of: selecting the maximum transmission power from among transmission power of multiple uplink channels transmitted to a specific serving cell in a first subframe; and when a first uplink channel has transmission power lower than the maximum transmission power and the transmission power is smaller than the difference between the maximum transmission power and a first threshold, determining boosting of the transmission power of the first uplink channel. Here, the multiple uplink channels may comprise one or more of an uplink data channel, an uplink control channel, and an uplink reference signal.