A terminal device that communicates with a base station apparatus by using a plurality of serving cells in carrier aggregation, the terminal device comprising: a reception unit configured to decode a first physical downlink control channel, PDCCH, with a first downlink information, DCI, format for scheduling a single physical downlink shared channel, PDSCH, in the single serving cell, and to receive via a higher layer first information indicating a radio network temporary identifier, RNTI, second information and a parameter, and plural pieces of third information on a second PDCCH with cyclic redundancy check, CRC, parity bits scrambled by the RNTI, the second information indicating subframes to monitor the second PDCCH, the plural pieces of third information being included in a second DCI format, each of the plural pieces of third information indicating an uplink-downlink configuration, and the parameter being an index specifying one of the plural pieces of third information for any of the serving cells; a control unit for configuring the subframes to monitor the second PDCCH based on at least the second information, and a configuring unit for setting the serving cells; characterized in that the configuring unit is configured to receive a medium access control-control element, MAC CE, from the base station apparatus and to set at least one activated or deactivated secondary cell of the plurality of serving cells based on the MAC CE; in a case where at least one of the serving cells corresponding to the second DCI format is activated, the reception unit is configured to monitor the second PDCCH which includes at least the plural pieces of third information, in a common search space for a primary cell, in the configured subframes, in a second case where all of the serving cells corresponding to the second DCI format are deactivated, the reception unit does not monitor the second PDCCH. a reception unit configured to decode a first physical downlink control channel, PDCCH, with a first downlink information, DCI, format for scheduling a single physical downlink shared channel, PDSCH, in the single serving cell, and to receive via a higher layer first information indicating a radio network temporary identifier, RNTI, second information and a parameter, and plural pieces of third information on a second PDCCH with cyclic redundancy check, CRC, parity bits scrambled by the RNTI, via a higher layer first information indicating a radio network temporary identifier, RNTI, second information and a parameter, and plural pieces of third information on a second PDCCH with cyclic redundancy check, CRC, parity bits scrambled by the RNTI, the second information indicating subframes to monitor the second PDCCH, the plural pieces of third information being included in a second DCI format, each of the plural pieces of third information indicating an uplink-downlink configuration, and the parameter being an index specifying one of the plural pieces of third information for any of the serving cells; a control unit for configuring the subframes to monitor the second PDCCH based on at least the second information, and a configuring unit for setting the serving cells; characterized in that the configuring unit is configured to receive a medium access control-control element, MAC CE, from the base station apparatus and to set at least one activated or deactivated secondary cell of the plurality of serving cells based on the MAC CE; in a case where at least one of the serving cells corresponding to the second DCI format is activated, the reception unit is configured to monitor the second PDCCH which includes at least the plural pieces of third information, in a common search space for a primary cell, in the configured subframes, in a second case where all of the serving cells corresponding to the second DCI format are deactivated, the reception unit does not monitor the second PDCCH.