Method and device for receiving or transmitting downlink control signal in wireless communication system

A user equipment (UE) configured to receive a downlink control signal in a wireless communication system, the UE comprising:

• a radio frequency (RF) unit;
• and
• a processor controls the RF unit,
• wherein the processor further:
• monitors the plurality of enhanced physical downlink control channel (EPDCCH) candidates in an EPDCCH set to decode the EPDCCH transmitted from a base station (BS) using the minimum aggregation level,
• decodes the EPDCCH transmitted from the BS, and
• receives a physical downlink shared channel (PDSCH) corresponding to the decoded EPDCCH,
• wherein a minimum aggregation level for a plurality of EPDCCH candidates is determined as 2 if both a downlink (DL) bandwidth includes at least 25 resource blocks (RBs) and a downlink control information (DCI) format is one of DCI formats 2, 2A, 2B, 2C and 2D.