A terminal (209, 1300) in a wireless communication system, comprising: a transceiver; and a controller configured to: control the transceiver to receive, from a first base station of a first network, a message including configuration information for adding a second base station of a second network to the terminal (209, 1300); identify whether a first uplink transmission to the first base station overlaps in time with a second uplink transmission to the second base station; identify whether a sum of a first transmission power for the first uplink transmission and a second transmission power for the second uplink transmission exceeds a configured maximum transmission power of the terminal (209, 1300), in case that the first uplink transmission overlaps in time with the second uplink transmission; control to reduce the second transmission power for the second uplink transmission and to maintain the first transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses evolved-universal terrestrial radio access, E-UTRA, radio access technology and the second network uses new radio, NR, radio access technology; and control to reduce the first transmission power for the first uplink transmission to maintain the second transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses the NR radio access technology and the second network uses the E-UTRA radio access technology, wherein a transmission time interval, TTI, used by the E-UTRA radio access technology is 1ms, and a TTI used by the NR radio access technology is shorter than 1ms. a transceiver; and a controller configured to: control the transceiver to receive, from a first base station of a first network, a message including configuration information for adding a second base station of a second network to the terminal (209, 1300); identify whether a first uplink transmission to the first base station overlaps in time with a second uplink transmission to the second base station; identify whether a sum of a first transmission power for the first uplink transmission and a second transmission power for the second uplink transmission exceeds a configured maximum transmission power of the terminal (209, 1300), in case that the first uplink transmission overlaps in time with the second uplink transmission; control to reduce the second transmission power for the second uplink transmission and to maintain the first transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses evolved-universal terrestrial radio access, E-UTRA, radio access technology and the second network uses new radio, NR, radio access technology; and control to reduce the first transmission power for the first uplink transmission to maintain the second transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses the NR radio access technology and the second network uses the E-UTRA radio access technology, wherein a transmission time interval, TTI, used by the E-UTRA radio access technology is 1ms, and a TTI used by the NR radio access technology is shorter than 1ms. control the transceiver to receive, from a first base station of a first network, a message including configuration information for adding a second base station of a second network to the terminal (209, 1300); identify whether a first uplink transmission to the first base station overlaps in time with a second uplink transmission to the second base station; identify whether a sum of a first transmission power for the first uplink transmission and a second transmission power for the second uplink transmission exceeds a configured maximum transmission power of the terminal (209, 1300), in case that the first uplink transmission overlaps in time with the second uplink transmission; control to reduce the second transmission power for the second uplink transmission and to maintain the first transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses evolved-universal terrestrial radio access, E-UTRA, radio access technology and the second network uses new radio, NR, radio access technology; and control to reduce the first transmission power for the first uplink transmission to maintain the second transmission power, in case that the sum exceeds the configured maximum transmission power of the terminal (209, 1300) and the first network uses the NR radio access technology and the second network uses the E-UTRA radio access technology, wherein a transmission time interval, TTI, used by the E-UTRA radio access technology is 1ms, and a TTI used by the NR radio access technology is shorter than 1ms.