Method for transmitting control information by a base station in a wireless communication system, and device therefor

An eNode B device in a wireless communication system, the eNode B device comprising:

• a processor configured to allocate downlink control information for the user equipment to a transmission resource for an enhanced physical downlink control channel (ePDCCH) other than a relay physical downlink control channel (R-PDCCH);
• and
• a radio communication module configured to transmit the downlink control information to the user equipment using the transmission resource via the ePDCCH,
• wherein the downlink control information for the user equipment comprises a downlink grant and one or more uplink grants,
• wherein the processor is configured to allocate the downlink grant to either a first slot or a second slot of a subframe among the transmission resource,
• wherein the processor is configured to allocate the uplink grants to both of the first slot and the second slot of the subframe among the transmission resource, respectively, and
• wherein a number of first blind decoding to be performed for a first uplink grant in the first slot is different than a number of second blind decoding to be performed for a second uplink grant in the second slot.

A method of receiving downlink control information by a user equipment in a wireless communication system, the method comprising:

• performing blind decoding the transmission resource to which downlink control information is allocated for an enhanced physical downlink control channel (ePDCCH) other than a relay-PDCCH (R-PDCCH);
• and
• obtaining the downlink control information allocated to the transmission resource,
• wherein the downlink control information comprises a downlink grant and one or more uplink grants,
• wherein the downlink grant is allocated to either a first slot or a second slot of a subframe among the transmission resource,
• wherein the uplink grants are allocated to both of the first slot and the second slot of the subframe among the transmission resource, and
• wherein a number of first blind decoding to be performed for a first uplink grant in the first slot is different than a number of second blind decoding to be performed for a second uplink grant in the second slot.