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

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.

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.