A User Equipment, UE, for sending information to an evolved Node B, eNB, the UE comprising: an operations unit configured to determine a Time-Division Duplexing, TDD, uplink-downlink, UL-DL, configuration of a primary cell, PCell, and a TDD UL-DL configuration of a secondary cell, SCell, wherein the TDD UL-DL configuration of the SCell is different from the TDD UL-DL configuration of the PCell; and a transmitting unit configured to transmit Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement, HARQ-ACK, information in an uplink, UL, subframe n for a serving cell of a plurality of serving cells, the serving cell being the PCell or the SCell, wherein the HARQ-ACK information in the uplink subframe n corresponds to a Physical Downlink Shared Channel, PDSCH, in a subframe n-k, wherein a set K includes one or more values of k; and the operations unit determines, for each of the plurality of the serving cells, HARQ-ACK, feedback bits o c, 0 ACK o c, 1 ACK,..., o c, O c ACK − 1 ACK for a c-th serving cell which is the each of the plurality of the serving cells and which is configured by Radio Resource Control, RRC, in a case that a Physical Uplink Control Channel, PUCCH, Format 3 is configured for transmission of the HARQ-ACK information; wherein c ≥ 0: O c ACK = B c DL in a case that a transmission mode configured in the c-th serving cell supports one transport block or spatial HARQ-ACK bundling is applied and O c ACK = 2 B c DL otherwise, wherein B c DL is a number of downlink subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, B c DL = M c in a case that the UE is transmitting in a subframe n on the PUCCH format 3, wherein, in a case that the c-th serving cell is the SCell, the M c is defined such that the M c is equal to a number of all downlink or special subframes, which are associated with an uplink subframe by the set K for the SCell, except for one or more subframes indicated as uplink subframes by the TDD UL-DL configuration for the SCell, the set K for the PCell is determined based on the TDD UL-DL configuration of the PCell and the set K for the SCell is determined based on a TDD UL-DL configuration which is a reference configuration, and the TDD UL-DL configuration which is the reference configuration is determined based on the TDD UL-DL configuration of the PCell and the TDD UL-DL configuration of the SCell. an operations unit configured to determine a Time-Division Duplexing, TDD, uplink-downlink, UL-DL, configuration of a primary cell, PCell, and a TDD UL-DL configuration of a secondary cell, SCell, wherein the TDD UL-DL configuration of the SCell is different from the TDD UL-DL configuration of the PCell; and a transmitting unit configured to transmit Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement, HARQ-ACK, information in an uplink, UL, subframe n for a serving cell of a plurality of serving cells, the serving cell being the PCell or the SCell, wherein the HARQ-ACK information in the uplink subframe n corresponds to a Physical Downlink Shared Channel, PDSCH, in a subframe n-k, wherein a set K includes one or more values of k; and the operations unit determines, for each of the plurality of the serving cells, HARQ-ACK, feedback bits o c, 0 ACK o c, 1 ACK,..., o c, O c ACK − 1 ACK for a c-th serving cell which is the each of the plurality of the serving cells and which is configured by Radio Resource Control, RRC, in a case that a Physical Uplink Control Channel, PUCCH, Format 3 is configured for transmission of the HARQ-ACK information; wherein c ≥ 0: O c ACK = B c DL in a case that a transmission mode configured in the c-th serving cell supports one transport block or spatial HARQ-ACK bundling is applied and O c ACK = 2 B c DL otherwise, wherein B c DL is a number of downlink subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, B c DL = M c in a case that the UE is transmitting in a subframe n on the PUCCH format 3, wherein, in a case that the c-th serving cell is the SCell, the M c is defined such that the M c is equal to a number of all downlink or special subframes, which are associated with an uplink subframe by the set K for the SCell, except for one or more subframes indicated as uplink subframes by the TDD UL-DL configuration for the SCell, the set K for the PCell is determined based on the TDD UL-DL configuration of the PCell and the set K for the SCell is determined based on a TDD UL-DL configuration which is a reference configuration, and the TDD UL-DL configuration which is the reference configuration is determined based on the TDD UL-DL configuration of the PCell and the TDD UL-DL configuration of the SCell.