Method for determining transmission configuration indicator for terminal in wireless communication system and device using same method

1. A method for determining a transmission configuration indicator (TCI) of a user equipment (UE) in a wireless communication system, the method comprising:

receiving a radio resource control (RRC) signal including a plurality of TCI states;

receiving a medium access control (MAC) control element (CE) informing one TCI state among the plurality of TCI states; and

determining a TCI for a control resource set (CORESET) based on the RRC signal and the MAC CE,

wherein the RRC signal is a first RRC signal including TCI states related to a physical downlink shared channel (PDSCH) or a second RRC signal including TCI states related to a physical downlink control channel (PDCCH), and

wherein based on the CORESET being a specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDSCH, and based on the CORESET not being the specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDCCH.

2. The method of claim 1 , wherein the TCI states related to the PDCCH included in the second RRC signal are a subset of the TCI states related to the PDSCH included in the first RRC signal.

3. The method of claim 1 , wherein the first RRC signal includes 64 TCI states related to the PDSCH.

4. A user equipment (UE), comprising:

a transceiver for transmitting and receiving a radio signal; and

a processor operating with being connected to the transceiver,

wherein the processor is configured to:

receive a radio resource control (RRC) signal including a plurality of TCI states,

receive a medium access control (MAC) control element (CE) informing one TCI state among the plurality of TCI states and

determine a TCI for a control resource set (CORESET) based on the RRC signal and the MAC CE,

wherein the RRC signal is a first RRC signal including TCI states related to a physical downlink shared channel (PDSCH) or a second RRC signal including TCI states related to a physical downlink control channel (PDCCH), and

wherein based on the CORESET being a specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDSCH, and based on the CORESET not being the specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDCCH.

5. The UE of claim 4 , wherein the TCI states related to the PDCCH included in the second RRC signal are a subset of the TCI states related to the PDSCH included in the first RRC signal.

6. The UE of claim 4 , wherein the first RRC signal includes 64 TCI states related to the PDSCH.

7. The UE of claim 4 , wherein the UE communicates with at least one of a mobile terminal, a network and a self-driving vehicle except the UE.

8. A processor for a wireless communication device in a wireless communication system, wherein the processor controls the wireless communication device configured to:

receive a radio resource control (RRC) signal including a plurality of TCI states,

receive a medium access control (MAC) control element (CE) informing one TCI state among the plurality of TCI states and

determine a TCI for a control resource set (CORESET) based on the RRC signal and the MAC CE,

wherein the RRC signal is a first RRC signal including TCI states related to a physical downlink shared channel (PDSCH) or a second RRC signal including TCI states related to a physical downlink control channel (PDCCH), and

wherein based on the CORESET being a specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDSCH, and based on the CORESET not being the specific CORESET, the MAC CE informs one TCI state among the TCI states related to the PDCCH.

9. The processor of claim 8 , wherein the TCI states related to the PDCCH included in the second RRC signal are a subset of the TCI states related to the PDSCH included in the first RRC signal.