Methods for transmitting and receiving hybrid automatic retransmit request-acknowledgment (HARQ-ACK) index mapping and uplink resource allocation for channel selection transmission in inter-band time division duplex mode, user equipment to transmit HARQ-ACK, and eNode-B to receive HARQ-ACK

1. A wireless communication method comprising:

receiving, from an eNode-B (eNB), data using at least a part of a first set of downlink subframes on a primary cell and a second set of downlink subframes on a secondary cell,

wherein the first set of downlink subframes is associated with an uplink subframe and the second set of downlink subframes is associated with the uplink subframe;

determining a difference between a number of the first set of the downlink subframes and a number of the second set of downlink subframes;

generating ACK/NACK information comprising Discontinuous Transmission (DTX) response information and response information on data received from the eNB,

wherein the DTX response information for a cell, among the primary cell and the secondary cell, is based on the difference,

wherein the DTX response information comprises DTX response(s) and the difference corresponds to a number of the DTX response(s); and

transmitting, to the eNB, the ACK/NACK information.

2. The method of claim 1 , wherein the ACK/NACK information comprises a set of bits, N bits of the set of bits are set as DTX, and N denotes the difference.

3. The method of claim 1 , wherein one of the number of the first set of downlink subframes and the number of the second set of downlink subframes is 3 and the other is 1.

4. The method of claim 1 , wherein a UL/DL configuration of the primary cell is different from a UL/DL configuration of the secondary cell.

5. The method of claim 1 , wherein the ACK/NACK information is transmitted using the uplink subframe.

6. The method of claim 5 , wherein the ACK/NACK information is transmitted using PUCCH format 1b.

7. A communication apparatus comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to:

cause the apparatus to receive, from an eNode-B (eNB), data using at least a part of a first set of downlink subframe on a primary cell and a second set of downlink subframes on a secondary cell, wherein the first set of downlink subframes is associated with an uplink subframe and the second set of downlink subframe is associated with the uplink subframe;

determine a difference between a number of the first set of the downlink subframes and a number of the second set of downlink subframes;

generate ACK/NACK information comprising Discontinuous Transmission (DTX) response information and response information on data received from the eNB,

wherein the DTX response information for a cell, among the primary cell and the secondary cell, is based on the difference,

wherein the DTX response information comprises DTX response(s) and the difference corresponds to a number of the DTX response(s); and

cause the apparatus to transmit, to the eNB, the ACK/NACK information.

8. The communication apparatus of claim 7 , wherein the ACK/NACK information comprises a set of bits, N bits of the set of bits are set as DTX, and N denotes the difference.

9. The communication device of claim 7 , wherein one of the number of the first set of downlink subframes and the number of the second set of downlink subframes is 3 and the other is 1.

10. The communication apparatus of claim 7 , wherein a UL/DL configuration of the primary cell is different from a UL/DL configuration of the secondary cell.

11. The communication apparatus of claim 7 , wherein the ACK/NACK information is transmitted using the uplink subframe.

12. The communication apparatus of claim 11 , wherein the ACK/NACK information is transmitted using PUCCH format 1b.

13. A communication device for a user equipment (UE), comprising:

A memory; and

A processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to:

cause the UE to receive, from an eNode-B (eNB), data using at least a part of a first set of downlink subframes on a primary cell and a second set of downlink subframes on a secondary cell, wherein the first set of downlink subframes is associated with an uplink subframe and the second set of downlink subframes is associated with the uplink subframe;

determine a difference between a number of the first set of the downlink subframe and a number of the second set of downlink subframes;

generate ACK/NACK information for comprising Discontinuous Transmission (DTX) response information and response information on data received from the eNB,

wherein the DTX response information for a cell, among the primary cell and the secondary cell, is based on the difference,

wherein the DTX response information comprises DTX response(s) and the difference corresponds to a number of the DTX response(s); and

cause the UE to transmit, to the eNB, the ACK/NACK information.

14. The communication device of claim 13 , wherein the ACK/NACK information comprises a set of bits, N bits of the set of bits are set as DTX, and N denotes the difference.

15. The communication device of claim 13 , wherein one of the number of the first set of downlink subframes and the number of the second set of downlink subframes is 3 and the other is 1.

16. The communication device of claim 13 , wherein a UL/DL configuration of the primary cell is different from a UL/DL configuration of the secondary cell.

17. The communication device of claim 13 , wherein the ACK/NACK information is transmitted using the uplink subframe.

18. The communication device of claim 17 , wherein the ACK/NACK information is transmitted using PUCCH format 1b.