A mobile station device that communicates with a base station device, the mobile station device including: a determination unit which determines whether to request the base station device to provide control information of a small base station device accessed by the mobile station device or not; a first transmission unit, when the determination unit determines that the control information is to be requested, which sets information of the small base station device in a control information request message and transmits the control information request message to the base station device; a first reception unit which receives a response message transmitted from the base station device; and a measurement control execution unit which executes measurement control according to control information set in the response message received by the first reception unit.