Transmission on a PCell scheduled by an SCell PDCCH in a 5G NR network

1. An apparatus of a user equipment (UE) configured for operating in a fifth-generation (5G) new radio (NR) network, the apparatus comprising: processing circuitry; and memory, wherein the processing circuitry is configured to:

decode radio resource control (RRC) signalling comprising a physical downlink control channel (PDCCH) configuration information element comprising a monitoring capability configuration (monitoringCapabilityConfig) that configures the UE for scheduling on a primary cell (PCell) from a scheduling secondary cell (SCell), the scheduling SCell being an SCell that schedules a transmission on the PCell;

monitor search space sets for a number of PDCCH candidates within a number of non-overlapping control-channel elements (CCEs), wherein the number of PDCCH candidates and the number of non-overlapping CCEs include PDCCH candidates and non-overlapping CCEs on the scheduling SCell; and

decode one or more of the PDCCH candidates on the scheduling SCell for a downlink control information (DCI) format, the DCI format scheduling one of a physical downlink shared channel (PDSCH) transmission and a physical uplink shared channel (PUSCH) transmission of the PCell,

wherein the memory is configured to store the DCI format.

2. The apparatus of claim 1 , wherein the search space set is a UE specific search space (USS) set, and

wherein the DCI format is one of a DCI format 0_1 and a DCI format 1_1 configured on the scheduling SCell.

3. The apparatus of claim 2 , wherein the monitoring capability configuration comprises a monitoringCapabilityConfig=r15monitoringcapability.

4. The apparatus of claim 3 , wherein the processing circuitry is to determine a maximum number of the PDCCH candidates and a maximum number of the non-overlapping CCEs, and

wherein the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs include PDCCH candidates and non-overlapping CCEs on the scheduling SCell and include PDCCH candidates and non-overlapping CCEs on the PCell.

5. The apparatus of claim 4 , wherein when the number of the PDCCH candidates or the number of non-overlapping CCEs for monitoring the search space sets on both the PCell and the scheduling SCell exceed the corresponding maximum numbers, the processing circuitry is to configure the UE to refrain from monitoring one or more of the search space sets.

6. The apparatus of claim 5 , wherein the one or more of the search space sets include at least one of a USS set on the scheduling SCell and a USS set on the PCell.

7. The apparatus of claim 6 , wherein the maximum number of PDCCH candidates and the maximum number of non-overlapped CCEs are shared for search space set monitoring on the PCell and on the scheduling SCell.

8. The apparatus of claim 7 , wherein when the number of the PDCCH candidates or the number of non-overlapping CCEs for monitoring the search space sets on both the PCell and the scheduling SCell exceed the corresponding maximum numbers, the processing circuitry is to configure the UE to drop one or more of the search space sets.

9. The apparatus of claim 6 , wherein the processing circuitry is further configured to decode the scheduled PDSCH transmission and/or encode the scheduled PUSCH transmission for the PCell based on the DCI format.

10. The apparatus of claim 9 , wherein the processing circuitry is configured to perform radio-link failure (RLF) monitoring on the PCell and refrain from performing RLF monitoring on the SCell.

11. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a user equipment (UE) configured for operating in a fifth-generation (5G) new radio (NR) network, the processing circuitry is configured to:

decode radio resource control (RRC) signalling comprising a physical downlink control channel (PDCCH) configuration information element comprising a monitoring capability configuration (monitoringCapabilityConfig) that configures the UE for scheduling on a primary cell (PCell) from a scheduling secondary cell (SCell), the scheduling SCell being an SCell that schedules a transmission on the PCell;

monitor search space sets for a number of PDCCH candidates within a number of non-overlapping control-channel elements (CCEs), wherein the number of PDCCH candidates and the number of non-overlapping CCEs include PDCCH candidates and non-overlapping CCEs on the scheduling SCell; and

decode one or more of the PDCCH candidates on the scheduling SCell for a downlink control information (DCI) format, the DCI format scheduling one of a physical downlink shared channel (PDSCH) transmission and a physical uplink shared channel (PUSCH) transmission of the PCell.

12. The non-transitory computer-readable storage medium of claim 11 , wherein the search space set is a UE specific search space (USS) set, and

wherein the DCI format is one of a DCI format 0_1 and a DCI format 1_1 configured on the scheduling SCell.

13. The non-transitory computer-readable storage medium of claim 12 , wherein the monitoring capability configuration comprises a monitoringCapabilityConfig=r15monitoringcapability.

14. The non-transitory computer-readable storage medium of claim 13 , wherein the processing circuitry is to determine a maximum number of the PDCCH candidates and a maximum number of the non-overlapping CCEs, and

wherein the maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs include PDCCH candidates and non-overlapping CCEs on the scheduling SCell and include PDCCH candidates and non-overlapping CCEs on the PCell.

15. The non-transitory computer-readable storage medium of claim 14 , wherein when the number of the PDCCH candidates or the number of non-overlapping CCEs for monitoring the search space sets on both the PCell and the scheduling SCell exceed the corresponding maximum numbers, the processing circuitry is to configure the UE to refrain from monitoring one or more of the search space sets.

16. The non-transitory computer-readable storage medium of claim 15 , wherein the one or more of the search space sets include at least one of a USS set on the scheduling SCell and a USS set on the PCell.

17. The non-transitory computer-readable storage medium of claim 16 , wherein the maximum number of PDCCH candidates and the maximum number of non-overlapped CCEs are shared for search space set monitoring on the PCell and on the scheduling SCell.

18. The non-transitory computer-readable storage medium of claim 17 , wherein when the number of the PDCCH candidates or the number of non-overlapping CCEs for monitoring the search space sets on both the PCell and the scheduling SCell exceed the corresponding maximum numbers, the processing circuitry is to configure the UE to drop one or more of the search space sets.

19. The non-transitory computer-readable storage medium of claim 16 , wherein the processing circuitry is further configured to decode the scheduled PDSCH transmission and/or encode the scheduled PUSCH transmission for the PCell based on the DCI format.

20. The non-transitory computer-readable storage medium of claim 19 , wherein the processing circuitry is configured to perform radio-link failure (RLF) monitoring on the PCell and refrain from performing RLF monitoring on the SCell.