| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio communication system, a radio communication method, a mobile station device, and base station devices which can remove SCC (Secondary Component Carrier) in a CA (Carrier Aggregation) communication between the plurality of base stations.SOLUTION: The mobile station device comprises: a communication unit which performs carrier aggregation by using a first component carrier used for communication with a first base station device and a second component carrier used for communication with a second base station device; and a disconnection request unit which transmits disconnection request for removing the second component carrier from the component carriers used for the carrier aggregation, by using the first component carrier. The base station device comprises a disconnection preparation request unit which notifies the second base station device of first disconnection preparation request for requesting the second base station device to prepare to disconnect the second component carrier performing carrier aggregation, on the basis of the disconnection request. |
