Method for transmitting and receiving plurality of physical downlink control channels in wireless communication system, and device therefor

1. A method of transmitting, by a base station, a plurality of physical downlink control channels (PDCCHs) in a wireless communication system, the method comprising:

receiving, from a user equipment (UE), UE capability information representing a number of simultaneously supportable beams;

transmitting, to the UE, independent layer joint transmission (ILJT)-related configuration information; and

transmitting, to the UE, the plurality of PDCCHs based on the ILJT-related configuration information,

wherein the ILJT-related configuration information includes information for the plurality of PDCCHs scheduling a plurality of physical downlink shared channels (PDSCHs) that are overlapped, a scheduling offset threshold value separately configured for the plurality of PDCCHs scheduling the plurality of overlapping PDSCHs, and information for a control resource set (CORESET) which is configured based on at least one index representing a group of CORESETs, and

wherein a number of the at least one index is determined based on the UE capability information.

2. The method of claim 1 , wherein, based on the UE not simultaneously supporting a plurality of beams, a control resource set is configured based on one index.

3. The method of claim 1 ,

wherein, based on the UE simultaneously supporting two beams, the control resource set is configured based on two indexes,

wherein a first PDCCH of a control resource set with a first index is transmitted from a different transmission and reception point, panel, or beam from a second PDCCH of a control resource set with a second index.

4. The method of claim 3 , wherein the first PDCCH is received based on different QCL information for spatial parameter from the second PDCCH.

5. A base station transmitting a plurality of physical downlink control channels (PDCCHs) in a wireless communication system, the base station comprising:

one or more transceivers:

one or more processors; and

one or more memories functionally connected to the one or more processors and storing instructions performing operations,

wherein the operations include:

receiving, from a user equipment (UE), UE capability information representing a number of simultaneously supportable beams;

transmitting, to the UE, independent layer joint transmission (ILJT)-related configuration information; and

transmitting, to the UE, the plurality of PDCCHs based on the ILJT-related configuration information,

wherein the ILJT-related configuration information includes information for the plurality of PDCCHs scheduling a plurality of physical downlink shared channels (PDSCHs) that are overlapped, a scheduling offset threshold value separately configured for the plurality of PDCCHs scheduling the plurality of overlapping PDSCHs, and information for a control resource set (CORESET) which is configured based on at least one index representing a group of CORESETs, and

wherein a number of the at least one index is determined based on the UE capability information.

6. The base station of claim 5 , wherein, based on the UE not simultaneously supporting a plurality of beams, a control resource set is configured based on one index.

7. The base station of claim 5 ,

wherein, based on the UE simultaneously supporting two beams, the control resource set is configured based on two indexes,

wherein a first PDCCH of a control resource set with a first index is transmitted from a different transmission and reception point, panel, or beam from a second PDCCH of a control resource set with a second index.

8. The base station of claim 7 , wherein the first PDCCH is received based on different QCL information for spatial parameter from the second PDCCH.

9. A device comprising:

one or more memories; and

one or more processors functionally connected to the one or more memories,

wherein the one or more processors are configured to allow the device to:

receive, from a user equipment (UE), UE capability information representing a number of simultaneously supportable beams;

transmit, to the UE, independent layer joint transmission (ILJT)-related configuration information; and

transmit, to the UE, the plurality of PDCCHs based on the ILJT-related configuration information,

wherein the ILJT-related configuration information includes information for the plurality of PDCCHs scheduling a plurality of physical downlink shared channels (PDSCHs) that are overlapped, a scheduling offset threshold value separately configured for the plurality of PDCCHs scheduling the plurality of overlapping PDSCHs, and information for a control resource set (CORESET) which is configured based on at least one index representing a group of CORESETs, and

wherein a number of the at least one index is determined based on the UE capability information.

10. A non-transitory computer readable medium (CRM) storing one or more commands,

wherein the one or more commands, that are executable by one or more processors, cause a base station to:

receive, from a user equipment (UE), UE capability information representing a number of simultaneously supportable beams;

transmit, to the UE, independent layer joint transmission (ILJT)-related configuration information; and

transmit, to the UE, the plurality of PDCCHs based on the ILJT-related configuration information,

wherein the ILJT-related configuration information includes information for the plurality of PDCCHs scheduling a plurality of physical downlink shared channels (PDSCHs) that are overlapped, a scheduling offset threshold value separately configured for the plurality of PDCCHs scheduling the plurality of overlapping PDSCHs, and information for a control resource set (CORESET) which is configured based on at least one index representing a group of CORESETs, and

wherein a number of the at least one index is determined based on the UE capability information.