A method for transmitting Hybrid Automatic Retransmit Request-Acknowledgment, HARQ-ACK, information to an eNode-B, eNB, by a User Equipment, UE, wherein an uplink/downlink configuration of a Pcell and a Scell is a Time Division Duplex, TDD, configuration, cross-carrier scheduling is configured, and the Pcell and Scell have different uplink/downlink configurations, the method comprising: identifying KPCell as a number of downlink subframes of the Pcell associated with an uplink subframe, and identifying KSCell as a number of downlink subframes of the Scell associated with the uplink subframe; generating Discontinuous Transmission, DTX, response information using a difference between the KPCell and the KSCell, wherein the DTX response information comprises DTX response(s) and the difference between the KPCell and the KSCell corresponds to a number of the DTX responses, and wherein the DTX response information is generated for a cell, among the Pcell and the Scell, having a smaller number of downlink subframes between the Pcell and the Scell; generating HARQ-ACK information, using a mapping of a transport block and of the Pcell and Scell to HARQ-ACK bits, comprising the generated DTX response information and response information on data received in the Pcell and the Scell downlink subframes by the UE from the eNB; and transmitting the generated HARQ-ACK information to the eNB through the uplink subframe characterized in that the generating the HARQ-ACK information further comprises: applying time domain bundling across the response information on data received in a cell, among the Pcell and the Scell, having a larger number of downlink subframes between the Pcell and the Scell, and applying time domain bundling across the generated DTX response information and the response information on data received in a cell, among the Pcell and the Scell, having the smaller number of downlink subframes between the Pcell and the Scell. identifying KPCell as a number of downlink subframes of the Pcell associated with an uplink subframe, and identifying KSCell as a number of downlink subframes of the Scell associated with the uplink subframe; generating Discontinuous Transmission, DTX, response information using a difference between the KPCell and the KSCell, wherein the DTX response information comprises DTX response(s) and the difference between the KPCell and the KSCell corresponds to a number of the DTX responses, and wherein the DTX response information is generated for a cell, among the Pcell and the Scell, having a smaller number of downlink subframes between the Pcell and the Scell; generating HARQ-ACK information, using a mapping of a transport block and of the Pcell and Scell to HARQ-ACK bits, comprising the generated DTX response information and response information on data received in the Pcell and the Scell downlink subframes by the UE from the eNB; and transmitting the generated HARQ-ACK information to the eNB through the uplink subframe characterized in that the generating the HARQ-ACK information further comprises: applying time domain bundling across the response information on data received in a cell, among the Pcell and the Scell, having a larger number of downlink subframes between the Pcell and the Scell, and applying time domain bundling across the generated DTX response information and the response information on data received in a cell, among the Pcell and the Scell, having the smaller number of downlink subframes between the Pcell and the Scell. applying time domain bundling across the response information on data received in a cell, among the Pcell and the Scell, having a larger number of downlink subframes between the Pcell and the Scell, and applying time domain bundling across the generated DTX response information and the response information on data received in a cell, among the Pcell and the Scell, having the smaller number of downlink subframes between the Pcell and the Scell.