TERMINAL DEVICE, BASE STATION DEVICE, METHOD EXECUTED BY TERMINAL DEVICE, AND METHOD EXECUTED BY BASE STATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a communication system and a mobile station device that can efficiently manage setting information held by a base station device and the mobile station device in a system in which there are a plurality of component carriers.SOLUTION: A terminal device comprises a radio unit that communicates with a radio station device by carrier aggregation using a plurality of component carriers including one first component carrier and one or more second component carriers, obtains system information reported by the base station device through the first component carrier, and obtains system information corresponding to one of the second component carriers from the base station device. The system information corresponding to one of the second component carrier is used in a communication state, and renewed using a radio resource control (RRC) connection reconfiguration message.SELECTED DRAWING: Figure 7