Terminal capable of simultaneously performing cellular communication and D2D communication

A User Equipment (UE) comprising:

• a first duplexer configured to separate a first transmission signal and a first reception signal in a first band for cellular communication;
• a second duplexer configured to separate a second transmission signal for Device to Device (D2D) communication and a second reception signal for one of the cellular communication or the D2D communication in a second band,
• wherein the second duplexer is used for both of the cellular communication and the D2D communication,
• wherein, when the second reception signal is for the cellular communication, the second duplexer transfers the second reception signal to a low noise Amplifier (LNA), and
• wherein, when the second reception signal is for the D2D communication, the second duplexer transfers the second reception signal to a directional coupler determining transmission direction of the second transmission signal and the second reception signal;
• and
• a first band switch configured to select one of the first duplexer or the second duplexer,
• wherein the first band and the second band correspond to different inter-bands.