Method and apparatus for transmitting reception acknowledgement in wireless communication system

A user equipment (UE), the UE comprising:

• a transceiver;
• and
• a processor, operatively coupled to the transceiver, wherein the processor is configured to:
• receive configuration information specifying whether to detect the DCI in an enhanced physical downlink control channel (EPDCCH) region, and
• monitor the DCI in at least one of a physical downlink control channel (PDCCH) region and the EPDCCH region based on the configuration information,
• wherein based on the configuration information specifying that the DCI is detected in the EPDCCH region, a first DCI format is monitored in a common search space (CSS) of the PDCCH region and a second DCI format is monitored in a user equipment specific search space (USS) of the EPDCCH region, and
• wherein the first DCI format is DCI format 0 which is used for scheduling a physical uplink shared channel (PUSCH) or DCI format 1A which is used for scheduling a physical downlink shared channel (PDSCH).

A processor for a wireless communication device in a wireless communication system,

• wherein the processor is configured to control the wireless communication device to:
• receive configuration information specifying whether to detect the DCI in an enhanced physical downlink control channel (EPDCCH) region, and
• monitor the DCI in at least one of a physical downlink control channel (PDCCH) region and the EPDCCH region based on the configuration information,
• wherein based on the configuration information specifying that the DCI is detected in the EPDCCH region, a first DCI format is monitored in a common search space (CSS) of the PDCCH region and a second DCI format is monitored in a user equipment specific search space (USS) of the EPDCCH region, and
• wherein the first DCI format is DCI format 0 which is used for scheduling a physical uplink shared channel (PUSCH) or DCI format 1A which is used for scheduling a physical downlink shared channel (PDSCH).