Wireless communication terminal, wireless communication base station, wireless communication system, and reporting method

An integrated circuit comprising:

• reception circuitry, which, in operation, receives control information regarding a report related to measurement of communication cells, which include a primary cell (PCell) and at least one secondary cell (SCell) when carrier aggregation (CA) is configured by a wireless communication base station;
• control circuitry, which is coupled to the reception circuitry and which, in operation,
• monitors a radio link with the PCell;
• performs measurement on downlink signals of the PCell and the at least one SCell;
• and
• generates a radio link failure report when a radio link failure occurs in the PCell;
• wherein when the received control information includes an instruction to restrict the measurement of the PCell to a portion of radio resources of the PCell, the radio link failure report includes a measurement result of the portion of the radio resources of the PCell;
• and
• transmission circuitry, which is coupled to the control circuitry and which, in operation, transmits the radio link failure report.