A terminal device comprising: a reception unit configured to receive, from a base station device, a measurement configuration message including report configuration related to a Sidelink Direct Discovery, wherein the measurement configuration message is received in a first frequency and includes frequency information indicating a second frequency which is different from the first frequency; and a controlling unit configured to start a first timer with a predetermined value being configured, wherein the first timer is started based on a determination of whether or not the report configuration is configuration for causing the terminal device to report system information related to the Sidelink Direct Discovery; the reception unit being further configured to receive system information including configuration information which is related to a Sidelink Direct Discovery announcement monitoring and is broadcasted in a cell detected at the second frequency indicated by the frequency information, the reception unit being further configured to perform the Sidelink Direct Discovery announcement monitoring, the terminal device further comprising: a measurement unit configured to perform, based on the measurement configuration message, measurement causing reception of the system information including the configuration information; and a transmission unit configured to transmit, to the base station device, a measurement report including the configuration information obtained by the measurement, wherein the measurement report is transmitted, in a case where the reception unit receives, while the first timer is running, the system information. a reception unit configured to receive, from a base station device, a measurement configuration message including report configuration related to a Sidelink Direct Discovery, wherein the measurement configuration message is received in a first frequency and includes frequency information indicating a second frequency which is different from the first frequency; and a controlling unit configured to start a first timer with a predetermined value being configured, wherein the first timer is started based on a determination of whether or not the report configuration is configuration for causing the terminal device to report system information related to the Sidelink Direct Discovery; the reception unit being further configured to receive system information including configuration information which is related to a Sidelink Direct Discovery announcement monitoring and is broadcasted in a cell detected at the second frequency indicated by the frequency information, the reception unit being further configured to perform the Sidelink Direct Discovery announcement monitoring, the terminal device further comprising: a measurement unit configured to perform, based on the measurement configuration message, measurement causing reception of the system information including the configuration information; and a transmission unit configured to transmit, to the base station device, a measurement report including the configuration information obtained by the measurement, wherein the measurement report is transmitted, in a case where the reception unit receives, while the first timer is running, the system information. a measurement unit configured to perform, based on the measurement configuration message, measurement causing reception of the system information including the configuration information; and a transmission unit configured to transmit, to the base station device, a measurement report including the configuration information obtained by the measurement, wherein the measurement report is transmitted, in a case where the reception unit receives, while the first timer is running, the system information.