Method and apparatus for PDCCH monitoring

1. A user equipment (UE) comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor is configured to execute the computer-executable instructions to:

receive, from a base station, a first Physical Downlink Control Channel (PDCCH) monitoring configuration and a second PDCCH monitoring configuration, wherein the second PDCCH monitoring configuration allocates a plurality of PDCCH monitoring occasions within a slot; and

perform PDCCH monitoring based on at least one of the first PDCCH monitoring configuration and the second PDCCH monitoring configuration,

wherein a maximum number of non-overlapped Control Channel Elements (CCEs) in one slot is bound by a slot CCE limit, and a slot CCE limit of the first PDCCH monitoring configuration is different from a slot CCE limit of the second PDCCH monitoring configuration.

2. The UE of claim 1 , wherein the slot comprises a plurality of PDCCH monitoring spans, each of the plurality of PDCCH monitoring occasions allocated by the second PDCCH monitoring configuration is fully contained in one of the plurality of PDCCH monitoring spans, and a maximum number of non-overlapped CCEs in one of the plurality of PDCCH monitoring spans is bound by a span CCE limit corresponding to the second PDCCH monitoring configuration.

3. The UE of claim 2 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

receive, from the base station, an activation/deactivation indicator; and

activate/deactivate PDCCH monitoring in at least one of the plurality of PDCCH monitoring spans based on the activation/deactivation indicator.

4. The UE of claim 3 , wherein the activation/deactivation indicator is carried in one of a Medium Access Control (MAC) Control Element (CE) and a Downlink Control Information (DCI) format.

5. The UE of claim 3 , wherein the activation/deactivation indicator indicates an upcoming PDCCH monitoring span to be activated/deactivated.

6. The UE of claim 3 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

skip, based on the activation/deactivation indicator, PDCCH monitoring in a PDCCH monitoring span that contains a PDCCH for scheduling high priority data.

7. The UE of claim 2 , wherein the plurality of PDCCH monitoring spans comprises a first PDCCH monitoring span and a second PDCCH monitoring span, and the span CCE limit of the first PDCCH monitoring span is different from the span CCE limit of the second PDCCH monitoring span.

8. The UE of claim 1 , wherein a service corresponding to the second PDCCH monitoring configuration has a higher priority than a service corresponding to the first PDCCH monitoring configuration.

9. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

receive, from the base station, a configuration indicator to switch between the first PDCCH monitoring configuration and the second PDCCH monitoring configuration.

10. The UE of claim 1 , wherein the first PDCCH monitoring configuration and the second PDCCH monitoring configuration are configured based on a PDCCH monitoring capability transmitted to the base station.

11. A method for PDCCH monitoring performed by a UE, the method comprising:

receiving, from a base station, a first Physical Downlink Control Channel (PDCCH) monitoring configuration and a second PDCCH monitoring configuration, wherein the second PDCCH monitoring configuration allocates a plurality of PDCCH monitoring occasions within a slot; and

performing PDCCH monitoring based on at least one of the first PDCCH monitoring configuration and the second PDCCH monitoring configuration,

wherein a maximum number of non-overlapped Control Channel Elements (CCEs) in one slot is bound by a slot CCE limit, and a slot CCE limit of a first PDCCH monitoring configuration is different from a slot CCE limit of the second PDCCH monitoring configuration.

12. The method of claim 11 , wherein the slot comprises a plurality of PDCCH monitoring spans, each of the plurality of PDCCH monitoring occasions allocated by the second PDCCH monitoring configuration is fully contained in one of the plurality of PDCCH monitoring spans, and a maximum number of non-overlapped CCEs in one of the plurality of PDCCH monitoring spans is bound by a span CCE limit corresponding to the second PDCCH monitoring configuration.

13. The method of claim 12 , further comprising:

receiving, from the base station, an activation/deactivation indicator; and

activating/deactivating PDCCH monitoring in at least one of the plurality of PDCCH monitoring spans based on the activation/deactivation indicator.

14. The method of claim 13 , wherein the activation/deactivation indicator is carried in one of a Medium Access Control (MAC) Control Element (CE) and a Downlink Control Information (DCI) format.

15. The method of claim 13 , wherein the activation/deactivation indicator indicates an upcoming PDCCH monitoring span to be activated/deactivated.

16. The method of claim 13 , further comprising:

skipping, based on the activation/deactivation indicator, PDCCH monitoring in a PDCCH monitoring span that contains a PDCCH for scheduling high priority data.

17. The method of claim 12 , wherein the plurality of PDCCH monitoring spans comprises a first PDCCH monitoring span and a second PDCCH monitoring span, and the span CCE limit of the first PDCCH monitoring span is different from the span CCE limit of the second PDCCH monitoring span.

18. The method of claim 11 , wherein a service corresponding to the second PDCCH monitoring configuration has a higher priority than a service corresponding to the first PDCCH monitoring configuration.

19. The method of claim 11 , further comprising:

receiving, from the base station, a configuration indicator to switch between the first PDCCH monitoring configuration and the second PDCCH monitoring configuration.

20. The method of claim 11 , wherein the first PDCCH monitoring configuration and the second PDCCH monitoring configuration are configured based on a PDCCH monitoring capability transmitted to the base station.