A UE 100 performs, in a connected mode, measurement and measurement reporting on a downlink reference signal, based on “Measurement Config” received from a eNB 200. When the UE 100 has not received the “Measurement Config” from the eNB 200, the UE 100 transmits a measurement configuration request for requesting transmission of the “Measurement Config” to the eNB 200. The UE 100 receives the “Measurement Config” transmitted from the eNB 200 in response to the measurement configuration request.