A radio base station (eNB) comprising: a setting unit configured to be able to set information elements in a connection reconfiguration signal to be transmitted to a mobile station; and a transmission unit configured to transmit the connection reconfiguration signal to the mobile station, wherein when a first measurement target for a measurement report, a first report condition for the measurement report, and a first measurement ID associating the first measurement target and the first report condition with each other are set as measurement configuration information element for the mobile station, the setting unit is configured to set a report configuration addition information element and a measurement ID addition information element to the measurement configuration information element in the connection reconfiguration signal, the report configuration addition information element commanding to add a second report condition having the same content as the first report condition, and the measurement ID addition information element commanding to add a second measurement ID associating the first measurement target and the second report condition, and characterized in that the setting unit is configured to set a first location information attachment information element to a report configuration information element for the second report condition contained in the report configuration addition information element and set a second location information attachment information element in the connection reconfiguration signal, the second location information attachment information element indicating that location information on the mobile station is to be attached to the measurement report. a setting unit configured to be able to set information elements in a connection reconfiguration signal to be transmitted to a mobile station; and a transmission unit configured to transmit the connection reconfiguration signal to the mobile station, wherein when a first measurement target for a measurement report, a first report condition for the measurement report, and a first measurement ID associating the first measurement target and the first report condition with each other are set as measurement configuration information element for the mobile station, the setting unit is configured to set a report configuration addition information element and a measurement ID addition information element to the measurement configuration information element in the connection reconfiguration signal, the report configuration addition information element commanding to add a second report condition having the same content as the first report condition, and the measurement ID addition information element commanding to add a second measurement ID associating the first measurement target and the second report condition, and characterized in that the setting unit is configured to set a first location information attachment information element to a report configuration information element for the second report condition contained in the report configuration addition information element and set a second location information attachment information element in the connection reconfiguration signal, the second location information attachment information element indicating that location information on the mobile station is to be attached to the measurement report.