Method of sending/receiving control information and device therefor

A user equipment (UE) configured to receive control information about a coordinated multi-point (CoMP) set from a serving transmission point in a carrier aggregation based wireless communication system, the CoMP set including a primary cell and a secondary cell, the UE comprising:

• a processor;
• and
• a radio frequency (RF) module,
• wherein the processor is configured to receive information indicating control information size through higher layer signaling, monitor a plurality of control channel candidates for each cell of the CoMP set on the primary cell of the CoMP set and detect the control information,
• wherein, when the control information corresponds to a transmission mode (TM) dedicated downlink control information (DCI) format, the plurality of control channel candidates for each cell of the CoMP are determined to have a same information size as the control information size received through the higher layer signaling, and
• wherein, when the control information corresponds to a TM common DCI format, the plurality of control channel candidates for each cell of the CoMP set are determined to have a same information size as a DCI format size configured in the primary cell.