Method and device for dynamically indicating spatial parameters in wireless communication system

A terminal comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• receive, from a base station through the transceiver, downlink control information (DCI) including first information related to at least one transmission configuration indication (TCI) state, second information related to time domain resource assignment, and third information related to a physical uplink control channel (PUCCH) resource indication, the DCI being with or without scheduling a physical downlink shared channel (PDSCH);
• transmit, to the base station through the transceiver, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information based on the second information, based on the DCI without scheduling the PDSCH;
• and
• apply the at least one TCI state based on the first information, after transmitting the HARQ-ACK information,
• wherein the HARQ-ACK information corresponds to a detection of the DCI providing an update of the at least one TCI state without scheduling the PDSCH.

A base station comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• transmit, to a terminal through the transceiver, downlink control information (DCI) including first information related to at least one transmission configuration indication (TCI) state, second information related to time domain resource assignment, and third information related to a physical uplink control channel (PUCCH) resource indication, the DCI being with or without scheduling a physical downlink shared channel (PDSCH);
• and
• receive, from the terminal through the transceiver, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information based on the second information, based on the DCI without scheduling the PDSCH;
• wherein the at least one TCI state is applied to the terminal based on the first information, after transmitting the HARQ-ACK information, and
• wherein the HARQ-ACK information corresponds to a detection of the DCI providing an update of the at least one TCI state without scheduling the PDSCH.