Method of transmitting control information and device for same

A communication device configured to perform HARQ (hybrid automatic repeat request) retransmission in a wireless communication system, the communication device comprising:

• a radio frequency (RF) unit;
• and
• a processor,
• wherein the processor is configured to:
• initially transmit a data block to a Base Station (BS),
• attempt a detection of PDCCH (physical downlink control channel) in a predetermined time interval including a plurality of subframes after transmission of an uplink channel signal, and
• retransmit the data block using a resource indicated by the PDCCH,
• wherein a retransmission is indicated by a physical hybrid ARQ indicator channel (PHICH) when the user equipment (UE) is a first type UE, and
• wherein, when the UE is a second type UE, the retransmission is indicated by a HARQ index included in the PDDCH and a reception of a PHICH corresponding to the retransmission is skipped.