A method performed by a user equipment, UE in a wireless communication system, the method comprising: receiving information on a first maximum transmission power and a second maximum transmission power, wherein the first maximum transmission power is a maximum transmission power used in subframes where only an uplink, UL, transmission to a first base station can occur, and wherein the second maximum transmission power is a maximum transmission power used in subframes where both the UL transmission to the first base station and a UL transmission to a second base station can occur, wherein the second maximum transmission power is lower than the first maximum transmission power; determining whether the UL transmission to the second base station cannot occur at a subframe of the second base station based on a time division duplex, TDD, configuration, wherein the subframe of the second base station overlaps with a subframe of the first base station in time; determining a transmission power for the UL transmission to the first base station at the subframe of the first base station based on the first maximum transmission power upon determining that the UL transmission to the second base station cannot occur at the subframe of the second base station based on the TDD configuration; determining a transmission power for the UL transmission to the first base station at the subframe of the first base station based on the second maximum transmission power upon determining that the UL transmission to the second base station can occur at the subframe of the second base station based on the TDD configuration,; and performing the UL transmission to the first base station at the subframe of the first base station based on the determined transmission power, wherein the UE is connected to both the first base station and the second base station in dual connectivity. receiving information on a first maximum transmission power and a second maximum transmission power, wherein the first maximum transmission power is a maximum transmission power used in subframes where only an uplink, UL, transmission to a first base station can occur, and wherein the second maximum transmission power is a maximum transmission power used in subframes where both the UL transmission to the first base station and a UL transmission to a second base station can occur, wherein the second maximum transmission power is lower than the first maximum transmission power; determining whether the UL transmission to the second base station cannot occur at a subframe of the second base station based on a time division duplex, TDD, configuration, wherein the subframe of the second base station overlaps with a subframe of the first base station in time; determining a transmission power for the UL transmission to the first base station at the subframe of the first base station based on the first maximum transmission power upon determining that the UL transmission to the second base station cannot occur at the subframe of the second base station based on the TDD configuration; determining a transmission power for the UL transmission to the first base station at the subframe of the first base station based on the second maximum transmission power upon determining that the UL transmission to the second base station can occur at the subframe of the second base station based on the TDD configuration,; and performing the UL transmission to the first base station at the subframe of the first base station based on the determined transmission power, wherein the UE is connected to both the first base station and the second base station in dual connectivity.