A terminal apparatus that is configured to communicate with a base station apparatus, the terminal apparatus comprising: a receiving circuitry configured to and/or programmed to: receive first information indicating a first uplink-downlink configuration; receive second information indicating a second uplink-downlink configuration; and receive, on a physical downlink control channel, third information indicating a third uplink-downlink configuration; and a transmitting circuitry configured to and/or programmed to: transmit Hybrid Automatic Repeat Request-ACK, HARQ-ACK, in a subframe n1, the HARQ-ACK being for a transmission of a physical downlink shared channel that is detected in a subframe n1-k1; and transmit the HARQ-ACK in a subframe n2, the HARQ-ACK being for the transmission of the physical downlink shared channel that is detected in a subframe n2-k2, wherein in a case that the physical downlink control channel on which the third information is transmitted is detected and downlink control information to which Cyclic Redundancy Check, CRC parity bits scrambled by a Cell-Radio Network Temporary Identifier, C-RNTI, are attached is detected in the subframe n1-k1 that is indicated as a special subframe based on the first uplink-downlink configuration and is indicated as a downlink subframe based on the third uplink-downlink configuration, the physical downlink shared channel is detected in the subframe n1-k1 by assuming the subframe n1-k1 to be the downlink subframe based on the third uplink-downlink configuration, in a case that the physical downlink control channel on which the third information is transmitted is not detected and downlink control information to which CRC parity bits scrambled by the C-RNTI are attached is detected in the subframe n2-k2 that is indicated as a special subframe based on the first uplink-downlink configuration, the physical downlink shared channel is detected in the subframe n2-k2 by assuming the subframe n2-k2 to be the special subframe based on the first uplink-downlink configuration, and the k1 and the k2 are given by the second uplink-downlink configuration. a receiving circuitry configured to and/or programmed to: receive first information indicating a first uplink-downlink configuration; receive second information indicating a second uplink-downlink configuration; and receive, on a physical downlink control channel, third information indicating a third uplink-downlink configuration; and receive first information indicating a first uplink-downlink configuration; receive second information indicating a second uplink-downlink configuration; and receive, on a physical downlink control channel, third information indicating a third uplink-downlink configuration; and a transmitting circuitry configured to and/or programmed to: transmit Hybrid Automatic Repeat Request-ACK, HARQ-ACK, in a subframe n1, the HARQ-ACK being for a transmission of a physical downlink shared channel that is detected in a subframe n1-k1; and transmit the HARQ-ACK in a subframe n2, the HARQ-ACK being for the transmission of the physical downlink shared channel that is detected in a subframe n2-k2, wherein transmit Hybrid Automatic Repeat Request-ACK, HARQ-ACK, in a subframe n1, the HARQ-ACK being for a transmission of a physical downlink shared channel that is detected in a subframe n1-k1; and transmit the HARQ-ACK in a subframe n2, the HARQ-ACK being for the transmission of the physical downlink shared channel that is detected in a subframe n2-k2, wherein in a case that the physical downlink control channel on which the third information is transmitted is detected and downlink control information to which Cyclic Redundancy Check, CRC parity bits scrambled by a Cell-Radio Network Temporary Identifier, C-RNTI, are attached is detected in the subframe n1-k1 that is indicated as a special subframe based on the first uplink-downlink configuration and is indicated as a downlink subframe based on the third uplink-downlink configuration, the physical downlink shared channel is detected in the subframe n1-k1 by assuming the subframe n1-k1 to be the downlink subframe based on the third uplink-downlink configuration, in a case that the physical downlink control channel on which the third information is transmitted is not detected and downlink control information to which CRC parity bits scrambled by the C-RNTI are attached is detected in the subframe n2-k2 that is indicated as a special subframe based on the first uplink-downlink configuration, the physical downlink shared channel is detected in the subframe n2-k2 by assuming the subframe n2-k2 to be the special subframe based on the first uplink-downlink configuration, and the k1 and the k2 are given by the second uplink-downlink configuration. in a case that the physical downlink control channel on which the third information is transmitted is not detected and downlink control information to which CRC parity bits scrambled by the C-RNTI are attached is detected in the subframe n2-k2 that is indicated as a special subframe based on the first uplink-downlink configuration, the physical downlink shared channel is detected in the subframe n2-k2 by assuming the subframe n2-k2 to be the special subframe based on the first uplink-downlink configuration, and the k1 and the k2 are given by the second uplink-downlink configuration.