| 摘要 |
User equipment used in a mobile communication system that includes a first radio base station, a second radio base station and the user equipment is provided. The user equipment has a first communication device configured to conduct frequency division duplexing (FDD) communication with the first radio base station, and a second communication device configured to conduct time division duplexing (TDD) communication with the second radio base station, wherein the TDD communication between the user equipment and the second radio base station is conducted using an uplink frequency spectrum of the FDD communication, the first communication device is configured to receive a control signal used for communication with the second radio base station from the first radio base station, and the second communication device is configured to establish, reconfigure, or release a radio resource between the user equipment and the second radio base station based upon the control signal. |
