Method and apparatus for monitoring downlink control information

1 . A method performed by a user equipment (UE), the method comprising:

receiving, from a base station (BS), higher layer signaling including a table indicating one or more relations between one or more sensing beam indexes and one or more transmission beam indexes, wherein each row of a plurality of rows of the table is associated with a row index and indicates a sensing beam and one or more transmission beams;

receiving, from the BS, a downlink control information (DCI) including an indicator having a value corresponding to at least one row index of the table;

determining one or more sensing beams for a Listen-Before-Talk (LBT) procedure by matching the value of the indicator to the at least one row index to identify at least one row of the table; and

determining one or more transmission beams for transmission of a physical downlink control channel (PDCCH) from the identified at least one row of the table, the one or more transmission beams being within a spatial region of a channel occupancy (CO) initiated by the BS after completing the LBT procedure with the one or more sensing beams.

2 . The method of claim 1 , further comprising:

determining a plurality of transmission beams according to the at least one row of the table, wherein the plurality of transmission beams are within a spatial region of a channel occupancy (CO) associated with the sensing beam.

3 . The method of claim 1 , wherein each of the one or more transmission beams used by the BS to transmit the PDCCH corresponds to at least one control resource set (CORESET).

4 . The method of claim 3 , further comprising:

monitoring the PDCCH only in the at least one CORESET during a remaining CO duration.

5 . The method of claim 3 , wherein the at least one CORESET corresponds to a first group of search space sets and a second group of search space sets, and further comprising:

monitoring the PDCCH in the at least one CORESET according to the second group of search space sets instead of the first group of search space sets if a value of a field predefined for search space set switching is received in the DCI.

6 . The method of claim 1 , further comprising:

determining a plurality of transmission beams according to the at least one row of the table, wherein the plurality of transmission beams are within a spatial region of a CO associated with the sensing beam.

7 . The method of claim 6 , further comprising:

determining if at least one of the plurality of transmission beams is associated with another sensing beam indicated by an additional row of the table.

8 . The method of claim 7 , further comprising:

determining one or more additional transmission beams based on the additional row of the table.

9 . A user equipment (UE) for wireless communication, comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the UE to:

receive, from a base station (BS), higher layer signaling including a table indicating one or more relations between one or more sensing beam indexes and one or more transmission beam indexes, wherein each row of a plurality of rows of the table is associated with a row index and indicates a sensing beam and one or more transmission beams;

receive, from the BS, a downlink control information (DCI) including an indicator having a value corresponding to at least one row index of the table;

determine one or more sensing beams for a Listen-Before-Talk (LBT) procedure by matching the value of the indicator to the at least one row index to identify at least one row of the table; and

determine one or more transmission beams for transmission of a physical downlink control channel (PDCCH) from the identified at least one row of the table, the one or more transmission beams being within a spatial region of a channel occupancy (CO) initiated by the BS after completing the LBT procedure with the one or more sensing beams.

10 . The UE of claim 9 , wherein the at least one processor is configured to cause the UE to:

determine a plurality of transmission beams according to the at least one row of the table, wherein the plurality of transmission beams are within a spatial region of a CO associated with the sensing beam.

11 . The UE of claim 10 , wherein the at least one processor is configured to cause the UE to:

determine if at least one of the plurality of transmission beams is associated with another sensing beam indicated by an additional row of the table.

12 . The UE of claim 11 , wherein the at least one processor is configured to cause the UE to:

determine one or more additional transmission beams based on the additional row of the table.

13 . The UE of claim 9 , wherein each of the one or more transmission beams used for the transmission of the PDCCH corresponds to at least one control resource set (CORESET).

14 . The UE of claim 13 , wherein the at least one processor is configured to cause the UE to:

monitor the PDCCH only in the at least one CORESET during a remaining CO duration.

15 . The UE of claim 13 , wherein the at least one CORESET corresponds to a first group of search space sets and a second group of search space sets, and the at least one processor is configured to cause the UE to:

monitor the PDCCH in the at least one CORESET according to the second group of search space sets instead of the first group of search space sets if a value of a field predefined for search space set switching is received in the DCI.

16 . A base station (BS) for wireless communication, comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the BS to:

transmit, to a user equipment (UE), higher layer signaling including a table indicating relations between one or more sensing beam indexes and one or more transmission beam indexes, wherein each row of a plurality of rows of the table is associated with a row index and indicates a sensing beam and one or more transmission beams;

transmit, to the UE, a downlink control information (DCI) including an indicator having a value corresponding to at least one row index of the table;

perform, using one or more sensing beams indicated by at least one row of the table identified by the value of the indicator, a Listen-Before-Talk (LBT) procedure; and

transmit, to the UE using one or more transmission beams from the identified at least one row of the table, physical downlink control channel (PDCCH), the one or more transmission beams being within a spatial region of a channel occupancy (CO) initiated by the base station after completing the LBT procedure with the one or more sensing beams.

17 . A method performed by a base station (BS), the method comprising:

transmitting, to a user equipment (UE), higher layer signaling including a table indicating relations between one or more sensing beam indexes and one or more transmission beam indexes, wherein each row of a plurality of rows of the table is associated with a row index and indicates a sensing beam and one or more transmission beams;

transmitting, to the UE, a downlink control information (DCI) including an indicator having a value corresponding to at least one row index of the table;

performing, using one or more sensing beams indicated by at least one row of the table identified by the value of the indicator, a Listen-Before-Talk (LBT) procedure; and

transmitting, to the UE using one or more transmission beams from the identified at least one row of the table, physical downlink control channel (PDCCH), the one or more transmission beams being within a spatial region of a channel occupancy (CO) initiated by the base station after completing the LBT procedure with the one or more sensing beams.

18 . The method of claim 17 , wherein the at least one row of the table indicates that at least one of the one or more transmission beams is associated with at least one sensing beam.

19 . The method of claim 17 , wherein each of the one or more transmission beams used to transmit the PDCCH corresponds to at least one control resource set (CORESET).

20 . The method of claim 17 , wherein the at least one row of the table indicates a plurality of transmission beams, wherein the plurality of transmission beams are within a spatial region of a CO associated with the sensing beam.