Granted Patent B2

US 12,581,487 · App. 17/758,674 · Granted Mar 17, 2026

Inventors: Yuwei Ren (Beijing, CN); Huilin Xu (Temecula, CA); Seyedkianoush Hosseini (San Diego, CA); Wanshi Chen (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W72/1273H04W72/232

Abstract

Claims (115)

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

receiving one or more search space sets for a second cell; and

performing, based on the one or more search space sets, first physical downlink control channel (PDCCH) monitoring for downlink control information (DCI) for the second cell in a first cell and second PDCCH monitoring for DCI for the second cell in the second cell, wherein: when cross-carrier scheduling is configured for the second cell:

second cell data is self-schedulable by one or more fallback DCIs having DCI formats (0-0, 1-0) on a PDCCH of a secondary cell (SCell); and

second cell data is cross-carrier schedulable by one or more non-fallback DCIs having DCI formats (0-1, 1-1) on a PDCCH of another cell; and

the second cell includes the SCell.

2 . The method of claim 1 , wherein PDCCHs of the second cell are allowed to be monitored in multiple cells.

3 . The method of claim 1 , wherein:

when cross-carrier scheduling is configured for the second cell:

at least one other DCI is received in the second cell, the at least one other DCI comprising a group common (GC) DCI, a DCI for broadcast data scheduling, or both; and

the second cell includes a primary cell (PCell).

4 . The method of claim 1 , wherein:

monitoring PDCCH for the second cell in multiple cells allows flexible control resource utilization for carrier aggregation (CA);

the first PDCCH monitoring for the second cell in the first cell and the second PDCCH monitoring for the second cell in the second cell offloads control signaling of the second cell; or

a combination thereof.

5 . The method claim 1 , further comprising:

receiving, at the UE in the first cell, a first PDCCH for the second cell; and

receiving, by the UE in the second cell, a second PDCCH for the second cell; and

wherein a network configures the one or more search space sets for the second cell.

6 . The method of claim 1 , further comprising:

receiving one or more control resource sets (CORESETs), configured by a network, for monitoring PDCCH of the second cell in multiple cells; and

wherein the one or more CORESETs is associated with the one or more search space sets.

7 . The method of claim 1 , further comprising:

determining whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell;

monitoring PDCCH configured by the second search space set in the first cell based on a determination that the first search space set has the same ID as the second search space set; and

determining a resource for the first PDCCH monitoring in the first cell based on a CORESET in the first cell associated with the first search space set; and

wherein the CORESET associated with the second search space set is not used to determine the resource for the first PDCCH monitoring.

8 . The method of claim 1 , further comprising:

determining whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell;

monitoring PDCCH configured by the second search space set in the second cell based on a determination that the first search space set does not have the same ID as the second search space set; and

determining a resource for the second PDCCH monitoring in the second cell based on a CORESET in the second cell associated with the second search space set.

9 . The method of claim 1 , further comprising:

receiving an indication of at least one set of the one or more search space sets for monitoring PDCCH of the second cell; and

ignoring sets of the one or more search space sets other than the at least one set.

10 . The method of claim 1 , further comprising:

receiving an indication of at least one search space set configured for the first cell for PDCCH monitoring for the second cell.

11 . An apparatus configured for wireless communication, the apparatus comprising:

means for receiving one or more search space sets for a second cell; and

means for performing, based on the one or more search space sets, first physical downlink control channel (PDCCH) monitoring for downlink control information (DCI) for the second cell in a first cell and second PDCCH monitoring for DCI for the second cell in the second cell, wherein: when cross-carrier scheduling is configured for the second cell:

second cell data is self-schedulable by one or more fallback DCIs having DCI formats (0-0, 1-0) on a PDCCH of a secondary cell (SCell); and

second cell data is cross-carrier schedulable by one or more non-fallback DCIs having DCI formats (0-1, 1-1) on a PDCCH of another cell; and

the second cell includes the SCell.

12 . The apparatus of claim 11 , further comprising:

means for receiving, in the first cell, a first PDCCH for the second cell; and

means for receiving, in the second cell, a second PDCCH for the second cell.

13 . The apparatus of claim 11 , further comprising:

means for receiving one or more control resource sets (CORESETs) for monitoring PDCCH of the second cell in multiple cells; and

wherein the one or more CORESETs is associated with the one or more search space sets.

14 . The apparatus of claim 11 , further comprising:

means for determining whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell; and

means for monitoring PDCCH configured by the second search space set in the first cell based on a determination that the first search space set has the same ID as the second search space set.

15 . The apparatus of claim 11 , further comprising:

means for determining whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell; and

means for monitoring PDCCH configured by the second search space set in the second cell based on a determination that the first search space set does not have the same ID as the second search space set.

16 . The apparatus of claim 11 , further comprising:

means for receiving an indication of at least one set of the one or more search space sets for monitoring PDCCH of the second cell.

17 . The apparatus of claim 11 , further comprising:

means for receiving an indication of at least one search space set configured for the first cell for PDCCH monitoring for the second cell.

18 . A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

program code executable by a computer for causing the computer to:

receive one or more search space sets for a second cell; and

perform, based on the one or more search space sets, first physical downlink control channel (PDCCH) monitoring for downlink control information (DCI) for the second cell in a first cell and second PDCCH monitoring for DCI for the second cell in the second cell, wherein: when cross-carrier scheduling is configured for the second cell:

second cell data is self-schedulable by one or more fallback DCIs having DCI formats (0-0, 1-0) on a PDCCH of a secondary cell (SCell); and

second cell data is cross-carrier schedulable by one or more non-fallback DCIs having DCI formats (0-1, 1-1) on a PDCCH of another cell; and

the second cell includes the SCell.

19 . The non-transitory computer-readable medium of claim 18 , wherein the first PDCCH monitoring for the second cell in the first cell and the second PDCCH monitoring for the second cell in the second cell offloads control signaling of the second cell.

20 . The non-transitory computer-readable medium of claim 18 , wherein the program code is further executable by the computer for causing the computer to:

receive, at a user equipment (UE) in the first cell, a first PDCCH for the second cell; and

receive, by the UE in the second cell, a second PDCCH for the second cell.

21 . The non-transitory computer-readable medium of claim 18 , wherein the program code is further executable by the computer for causing the computer to:

determine whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell; and

monitor PDCCH configured by the second search space set in the first cell based on a determination that the first search space set has the same ID as the second search space set.

22 . The non-transitory computer-readable medium of claim 18 , wherein the program code is further executable by the computer for causing the computer to:

determine whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell; and

monitor PDCCH configured by the second search space set in the second cell based on a determination that the first search space set does not have the same ID as the second search space set.

23 . The non-transitory computer-readable medium of claim 18 , wherein the program code is further executable by the computer for causing the computer to:

receive an indication of at least one set of the one or more search space sets for monitoring PDCCH of the second cell.

24 . The non-transitory computer-readable medium of claim 18 , wherein the program code is further executable by the computer for causing the computer to:

receive an indication of at least one search space set configured for the first cell for PDCCH monitoring for the second cell.

25 . A user equipment (UE) configured for wireless communication, the UE comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to:

receive one or more search space sets for a second cell; and

perform, based on the one or more search space sets, first physical downlink control channel (PDCCH) monitoring for downlink control information (DCI) for the second cell in a first cell and second PDCCH monitoring for DCI for the second cell in the second cell, wherein: when cross-carrier scheduling is configured for the second cell:

second cell data is self-schedulable by one or more fallback DCIs having DCI formats (0-0, 1-0) on a PDCCH of a secondary cell (SCell); and

second cell data is cross-carrier schedulable by one or more non-fallback DCIs having DCI formats (0-1, 1-1) on a PDCCH of another cell; and

the second cell includes the SCell.

26 . The UE of any of claim 25 , wherein:

when cross-carrier scheduling is configured for the second cell at least one other DCI is received in the second cell, the at least one other DCI comprising a group common (GC) DCI, a DCI for broadcast data scheduling, or both.

27 . The UE of claim 25 , wherein:

monitoring PDCCH for the second cell in multiple cells allows flexible control resource utilization for carrier aggregation (CA);

the first PDCCH monitoring for the second cell in the first cell and the second PDCCH monitoring for the second cell in the second cell offloads control signaling of the second cell; or

a combination thereof.

28 . The UE of claim 25 , wherein the at least one processor is further configured to:

receive, in the first cell, a first PDCCH for the second cell; and

receive, in the second cell, a second PDCCH for the second cell; and

wherein a network configures the one or more search space sets for the second cell.

29 . The UE of claim 25 , wherein:

the at least one processor is further configured to:

receiving one or more control resource sets (CORESETs), configured by a network, for monitoring PDCCH of the second cell in multiple cells; and

the one or more CORESETs is associated with the one or more search space sets.

30 . The UE of claim 25 , wherein the at least one processor is further configured to:

determine whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell;

monitor PDCCH configured by the second search space set in the first cell based on a determination that the first search space set has the same ID as the second search space set; and

determine a resource for the first PDCCH monitoring in the first cell based on a CORESET in the first cell associated with the first search space set, the CORESET associated with the second search space set is not used to determine the resource for the first PDCCH monitoring.

31 . The UE of claim 25 , wherein the at least one processor is further configured to:

determine whether a first search space set configured in first cell has the same ID as a second search space set configured in the second cell;

monitor PDCCH configured by the second search space set in the second cell based on a determination that the first search space set does not have the same ID as the second search space set; and

determine a resource for the second PDCCH monitoring in the second cell based on a CORESET in the second cell associated with the second search space set.

32 . The UE of claim 25 , wherein the at least one processor is further configured to:

receive an indication of at least one set of the one or more search space sets for monitoring PDCCH of the second cell; and

ignore sets of the one or more search space sets other than the at least one set.

33 . The UE of claim 25 , wherein the at least one processor is further configured to:

receive an indication of at least one search space set configured for the first cell for PDCCH monitoring for the second cell.

Assignments (2)

Continuity (1)

References Cited (38)