Uplink transmission power control method and user equipment

An uplink transmission power control method, comprising:

• determining, by a user equipment, that multiple uplink channels are simultaneously transmitted over partially overlapped adjacent subframes of multiple carriers having different timing advance values;
• determining, by the user equipment, whether a total transmission power of the multiple uplink channels on an overlapped area of the partially overlapped adjacent subframes exceeds a maximum transmission power of the user equipment;
• and
• processing, by the user equipment, an uplink channel transmitted over a last symbol on a partially overlapped subframe of another carrier other than a carrier having a greatest timing advance value when the total transmission power of the multiple uplink channels on the overlapped area of the partially overlapped adjacent subframes exceeds the maximum transmission power of the user equipment;
• and
• when the total transmission power of the multiple uplink channels on the overlapped area of the partially overlapped adjacent subframes does not exceed the maximum transmission power of the user equipment, allowing, by the user equipment, simultaneous transmission of the multiple uplink channels over the partially overlapped adjacent subframes of the multiple carriers having different timing advances values.