Method for configuring reference point irrelevant to common resource block grid and apparatus therefor

1. A method for receiving a demodulation reference signal (DMRS) by a user equipment (UE) in a wireless communication system, the method comprising:

receiving a synchronization signal/physical broadcast channel (SS/PBCH) block;

acquiring, from a PBCH included in the SS/PBCH block, information regarding control resource set (CORESET) that is related to system information block (SIB) for remaining minimum system information (RMSI);

receiving a physical downlink control channel (PDCCH) through the CORESET related to the SIB for the RMSI; and

receiving a physical downlink shared channel (PDSCH) scheduled based on the PDCCH and a DMRS for the PDSCH,

wherein, based on the PDCCH being addressed to a system information-radio network temporary identifier (SI-RNTI), a reference point for the DMRS is a lowest-numbered subcarrier of a resource block (RB) having a lowest number among RBs included in the CORESET related to the SIB for the RMSI, and

wherein the PDCCH is received through a common search space of the CORESET related to the SIB for the RMSI, wherein the common search space is configured based on the PBCH included in the SS/PBCH block.

2. The method of claim 1 , wherein the CORESET related to the SIB for the RMSI is configured based on the PBCH included in the SS/PBCH block.

3. The method of claim 1 , wherein the UE is allowed to communicate with at least one of another UE, a network, a base station, or an autonomous vehicle.

4. An apparatus configured to receive a demodulation reference signal (DMRS) in a wireless communication system, the apparatus comprising:

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:

receiving a synchronization signal/physical broadcast channel (SS/PBCH) block;

acquiring, from a PBCH included in the SS/PBCH block, information regarding control resource set (CORESET) that is related to system information block (SIB) for remaining minimum system information (RMSI);

receiving a physical downlink control channel (PDCCH) through the CORESET related to the SIB for the RMSI; and

receiving a physical downlink shared channel (PDSCH) scheduled based on the PDCCH and a DMRS for the PDSCH,

wherein, based on the PDCCH being addressed to a system information-radio network temporary identifier (SI-RNTI), a reference point for the DMRS is a lowest-numbered subcarrier of a resource block (RB) having a lowest number among RBs included in the CORESET related to the SIB for the RMSI, and

wherein the PDCCH is received through a common search space of the CORESET related to the SIB for the RMSI, wherein the common search space is configured based on the PBCH included in the SS/PBCH block.

5. The apparatus of claim 4 , wherein the CORESET related to the SIB for the RMSI is configured based on the PBCH included in the SS/PBCH block.

6. The apparatus of claim 4 , wherein the apparatus is allowed to communicate with at least one of another apparatus, a network, a base station, or an autonomous vehicle other than the apparatus.

7. A terminal configured to receive a demodulation reference signal (DMRS) a wireless communication system, the terminal comprising:

at least one transceiver;

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:

receiving a synchronization signal/physical broadcast channel (SS/PBCH) block through the at least one transceiver;

acquiring, from a PBCH included in the SS/PBCH block, information regarding control resource set (CORESET) that is related to system information block (SIB) for remaining minimum system information (RMSI) through the at least one transceiver;

receiving, through the at least one transceiver, a physical downlink control channel (PDCCH) through the CORESET related to the SIB for the RMSI; and

receiving, through the at least one transceiver, a physical downlink shared channel (PDSCH) scheduled based on the PDCCH and a DMRS for the PDSCH,

wherein, based on the PDCCH being addressed to a system information-radio network temporary identifier (SI-RNTI), a reference point for the DMRS is a lowest-numbered subcarrier of a resource block (RB) having a lowest number among RBs included in the CORESET related to the SIB for the RMSI, and

wherein the PDCCH is received through a common search space of the CORESET related to the SIB for the RMSI, wherein the common search space is configured based on the PBCH included in the SS/PBCH block.

8. A method for transmitting a demodulation reference signal (DMRS) by a base station in a wireless communication system, the method comprising:

transmitting a synchronization signal/physical broadcast channel (SS/PBCH) block including information regarding control resource set (CORESET) that is related to system information block (SIB) for remaining minimum system information (RMSI);

transmitting a physical downlink control channel (PDCCH) through the CORESET related to the SIB for the RMSI; and

transmitting a physical downlink shared channel (PDSCH) scheduled based on the PDCCH and a DMRS for the PDSCH,

wherein, based on the PDCCH being addressed to a system information-radio network temporary identifier (SI-RNTI), a reference point for the DMRS is a lowest-numbered subcarrier of a resource block (RB) having a lowest number among RBs included in the CORESET related to the SIB for the RMSI, and

wherein the PDCCH is transmitted through a common search space of the CORESET related to the SIB for the RMSI, wherein the common search space is configured based on a PBCH included in the SS/PBCH block.