Method of transmitting and receiving downlink channel and apparatus therefor

A wireless device for receiving a Physical Downlink Control Channel (PDCCH) for Remaining Minimum System Information (RMSI) in a wireless communication system, the wireless device comprising:

• a memory;
• and
• a processor operatively connected with the memory and configured to:
• receive a SS/PBCH block including a synchronization signal (SS) and a Physical Broadcasting Channel (PBCH);
• obtain information related to a control resource set (CORESET) for the PDCCH via the PBCH;
• and
• receive the PDCCH within the CORESET based on the information,
• wherein the information includes an offset between a frequency position of the CORESET and a frequency position of the SS/PBCH block related to the CORESET, and
• wherein available values for the offset are defined based on a subcarrier spacing of the SS/PBCH block and a minimum channel bandwidth,
• wherein the offset informs the wireless device of a frequency position of a lowest resource block (RB) of the CORESET, and
• wherein an index of a frame including a first start slot of a monitoring window for the CORESET related to the SS/PBCH block having index #2n is different from an index of a frame including a second starting slot of a monitoring window of the CORESET related to the SS/PBCH block having index #2n+1.

A method for transmitting a Physical Downlink Control Channel (PDCCH) for Remaining Minimum System Information (RMSI) by a base station (BS) in a wireless communication system, the method comprising:

• transmitting a SS/PBCH block including a synchronization signal (SS) and a Physical Broadcasting Channel (PBCH);
• and
• transmitting the PDCCH within a control resource set (CORESET) based on information related to the CORESET for the PDCCH delivered via the PBCH,
• wherein the information includes an offset between a frequency position of the CORESET and a frequency position of the SS/PBCH block related to the CORESET, and
• wherein available values for the offset are defined based on a subcarrier spacing of the SS/PBCH block and a minimum channel bandwidth,
• wherein the offset informs a wireless device of a frequency position of a lowest resource block (RB) of the CORESET, and
• wherein an index of a frame including a first start slot of a monitoring window for the CORESET related to the SS/PBCH block having index #2n is different from an index of a frame including a second starting slot of a monitoring window of the CORESET related to the SS/PBCH block having index #2n+1.