Method for transmitting or receiving signal in wireless communication system and apparatus therefor

A method of transmitting downlink control information (DCI) by a base station (BS) in a wireless communication system, the method comprising:

• generating downlink control information (DCI) indicating a slot format;
• mapping a group common physical downlink control channel (PDCCH) to a common search space (CSS) having a plurality of PDCCH candidates;
• and
• transmitting the DCI through the group common PDCCH,
• wherein the group common PDCCH can be mapped on a PDCCH candidate in a N-th or M-th position among the plurality of PDCCH candidates included in the CSS, where ‘N’ and ‘M’ are fixed constants respectively.

A user equipment (UE) for receiving downlink control information (DCI), the UE comprising:

• a receiver;
• and
• a processor to control the receiver to perform blind detection for a group common physical downlink control channel (PDCCH) in a common search space (CSS) having a plurality of PDCCH candidates and to obtain downlink control information (DCI) indicating a slot format from the blind-detected group common PDCCH,
• wherein in the blind detection of the group common PDCCH, the processor attempts to detect the group common PDCCH on a PDCCH candidate in a N-th or M-th position among the plurality of PDCCH candidates included in the CSS, where ‘N’ and ‘M’ are fixed constants respectively.

A base station (BS) for transmitting downlink control information (DCI), the BS comprising:

• a processor to generate downlink control information (DCI) indicating a slot format and to map a group common physical downlink control channel (PDCCH) to a common search space (CSS) having a plurality of PDCCH candidates;
• and
• a transmitter to transmit the DCI through the group common PDCCH under control of the processor,
• wherein the group common PDCCH can be mapped on a PDCCH candidate in a N-th or M-th position among the plurality of PDCCH candidates included in the CSS, where ‘N’ and ‘M’ are fixed constants respectively.