Method and device for transmission and reception based on default spatial parameter 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 at least one transceiver, at least one of first configuration information related to at least one transmission configuration indicator (TCI) state configured for at least one TCI codepoint or second configuration information related to at least one TCI state configured for at least one control resource set (CORESET);
• receive, from the base station through the at least one transceiver, in a first time unit, downlink control information (DCI);
• and
• receive, from the base station through the at least one transceiver, in a second time unit, a downlink transmission based on a default TCI state,
• wherein, based on there being no TCI codepoint configured with a plurality of TCI states in an activation command through a medium access control (MAC) control element (CE), and the downlink transmission being a physical downlink shared channel (PDSCH) transmission:
• the default TCI state is determined based on a first TCI state of a plurality of TCI states indicated for a specific CORESET.

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 at least one transceiver, at least one of first configuration information related to at least one transmission configuration indicator (TCI) state configured for at least one TCI codepoint or second configuration information related to at least one TCI state configured for at least one control resource set (CORESET);
• transmit, to the terminal through the at least one transceiver, in a first time unit, downlink control information (DCI);
• and
• transmit, to the terminal through the at least one transceiver, in a second time unit, a downlink transmission based on a default TCI state,
• wherein, based on there being no TCI codepoint configured with a plurality of TCI states in an activation command through a medium access control (MAC) control element (CE), and the downlink transmission being a physical downlink shared channel (PDSCH) transmission:
• the default TCI state is determined based on a first TCI state of a plurality of TCI states indicated for a specific CORESET.