Method and apparatus for enhancing coverage for pdcch in wireless communication system

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a base station, configuration information on a control resource set (CORESET) via a radio resource control (RRC) signaling, the configuration information including a plurality of transmission configuration indicator (TCI) states for the CORESET,
• receive, from the base station, an activation command for activating two TCI states for the CORESET among the plurality of TCI states via a medium access control-control element (MAC CE) signaling, and
• receive, from the base station, at least one physical downlink control channel (PDCCH) based on the CORESET,
• wherein demodulation reference signal (DMRS) of the at least one PDCCH in the CORESET is quasi co-located with reference signals of the two TCI states.

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, configuration information on a control resource set (CORESET) via a radio resource control (RRC) signaling, the configuration information including a plurality of transmission configuration indicator (TCI) states for the CORESET;
• transmitting, to the terminal, an activation command for activating two TCI states for the CORESET among the plurality of TCI states via a medium access control-control element (MAC CE) signaling;
• and
• transmitting, to the terminal, at least one physical downlink control channel (PDCCH) based on the CORESET,
• wherein demodulation reference signal (DMRS) of the at least one PDCCH in the CORESET is quasi co-located with reference signals of the two TCI states.

Abase station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a terminal, configuration information on a control resource set (CORESET) via a radio resource control (RRC) signaling, the configuration information including a plurality of transmission configuration indicator (TCI) states for the CORESET,
• transmit, to the terminal, an activation command for activating two TCI states for the CORESET among the plurality of TCI states via a medium access control-control element (MAC CE) signaling, and
• transmit, to the terminal, at least one physical downlink control channel (PDCCH) based on the CORESET,
• wherein demodulation reference signal (DMRS) of the at least one PDCCH in the CORESET is quasi co-located with reference signals of the two TCI states.