Configuring discontinuous reception for different groups of cells

1. A method for wireless communications by a user equipment (UE), comprising:

receiving first discontinuous reception (DRX) configuration parameters for communications with a first group of cells and second DRX configuration parameters for communications with a second group of cells, wherein the first DRX configuration parameters and the second DRX configuration parameters share common starting time parameters;

monitoring for communications by the first group of cells operating in first frequency resources based on the first DRX configuration parameters; and

monitoring for communications by the second group of cells operating in second frequency resources based on the second DRX configuration parameters,

wherein the first and second DRX configuration parameters include a common short DRX cycle timer such that the UE operates in a same DRX cycle for the first group of cells operating in the first frequency resources and the second group of cells operating in the second frequency resources, wherein the first group of cells comprises a first group of serving cells, and wherein the second group of cells comprises a second group of serving cells.

2. The method of claim 1 , wherein the first frequency resources comprise a first set of frequency bands and the second frequency resources comprise a second set of frequency bands.

3. The method of claim 1 , wherein:

the first and second DRX configuration parameters are set based on the first frequency resources and the second frequency resources such that a monitoring period is shorter for a higher frequency resource than for a lower frequency resource.

4. The method of claim 1 , wherein:

the first and second DRX configuration parameters comprise a same starting offset and a long DRX cycle duration.

5. The method of claim 1 , wherein the first DRX configuration parameters include a first short DRX cycle timer and the second DRX configuration parameters include a second short DRX cycle timer, and wherein a length of the first and second short DRX cycle timers is set based on the first frequency resources and the second frequency resources.

6. The method of claim 1 , further comprising:

triggering a scheduling request with respect to a cell; and

responsive to triggering the scheduling request, activating DRX for serving cells configured with the first DRX configuration parameters but not configured with the second DRX configuration parameters.

7. The method of claim 1 , further comprising:

triggering a scheduling request with respect to a cell; and

responsive to triggering the scheduling request, activating DRX using the first DRX parameters or the second DRX parameters based on a frequency band in which the cell operates.

8. The method of claim 1 , further comprising:

receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells;

responsive to receiving the DRX MAC CE, halting DRX monitoring period and inactivity timers for cells operating on the first and the second frequency resources; and

restarting a DRX short cycle timer for the cells operating on the first and the second frequency resources.

9. The method of claim 1 , further comprising:

receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells; and

halting DRX monitoring period and inactivity timers for cells operating on one of the first or second frequency resources based on a frequency band of the one of the plurality of cells from which the DRX MAC CE was received.

10. The method of claim 1 , further comprising:

receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells, the DRX MAC CE including an indication of cells for which the DRX MAC CE is applicable; and

responsive to receiving the DRX MAC CE, halting DRX monitoring period and inactivity timers for the indicated cells.

11. The method of claim 1 , further comprising:

reporting channel state information (CSI) to a plurality of cells, wherein reported CSI for cells operating on the first frequency resources is not multiplexed with reported CSI for cells operating on the second frequency resources.

12. The method of claim 1 , further comprising:

reporting channel state information (CSI) to a plurality of cells, wherein the reported CSI comprises padding bits for cells associated with a frequency band for which the UE is not monitoring based on expiry of a DRX timer.

13. The method of claim 1 , further comprising:

reporting channel state information (CSI) to a plurality of cells based on a network-configured coding rate for reporting CSI for cells operating on frequency bands which the UE is not monitoring based on expiry of a DRX timer.

14. The method of claim 1 , further comprising:

starting a short DRX cycle timer when a DRX inactivity timer associated with the first group of cells expires and a DRX inactivity timer associated with the second group of cells is not running.

15. The method of claim 1 , further comprising:

starting a short DRX cycle timer for the first group of cells based on expiry of a DRX inactivity timer associated with the first group of cells; and

starting a short DRX cycle timer for the second group of cells based on expiry of a DRX inactivity timer associated with the second group of cells.

16. An apparatus for wireless communications by a user equipment (UE), comprising:

a memory; and

one or more processors coupled to the memory and configured to:

receive first discontinuous reception (DRX) configuration parameters for communications with a first group of cells and second DRX configuration parameters for communications with a second group of cells, wherein the first DRX configuration parameters and the second DRX configuration parameters share common starting time parameters,

monitor for communications by the first group of cells operating in first frequency resources based on the first DRX configuration parameters, and

monitor for communications by the second group of cells operating in second frequency resources based on the second DRX configuration parameters,

wherein the first and second DRX configuration parameters include a common short DRX cycle timer such that the UE operates in a same DRX cycle for the first group of cells operating in the first frequency resources and the second group of cells operating in the second frequency resources, wherein the first group of cells comprises a first group of serving cells, and wherein the second group of cells comprises a second group of serving cells.

17. The apparatus of claim 16 , wherein the first frequency resources comprise a first set of frequency bands and the second frequency resources comprise a second set of frequency bands.

18. The apparatus of claim 16 , wherein:

the first and second DRX configuration parameters are set based on the first frequency resources and the second frequency resources such that a monitoring period is shorter for a higher frequency resource than for a lower frequency resource.

19. The apparatus of claim 16 , wherein:

the first and second DRX configuration parameters comprise a same starting offset and a long DRX cycle duration.

20. The apparatus of claim 16 , wherein the first DRX configuration parameters include a first short DRX cycle timer and the second DRX configuration parameters include a second short DRX cycle timer, and wherein a length of the first and second short DRX cycle timers is set based on the first frequency resources and the second frequency resources.

21. The apparatus of claim 16 , wherein the one or more processors are further configured to:

trigger a scheduling request with respect to a cell; and

responsive to triggering the scheduling request, activate DRX for serving cells configured with the first DRX configuration parameters but not configured with the second DRX configuration parameters.

22. The apparatus of claim 16 , wherein the one or more processors are further configured to:

trigger a scheduling request with respect to a cell; and

responsive to triggering the scheduling request, activate DRX using the first DRX parameters or the second DRX parameters based on a frequency band in which the cell operates.

23. The apparatus of claim 16 , wherein the one or more processors are further configured to:

receive a DRX media access control (MAC) control element (CE) from one of a plurality of cells;

responsive to receiving the DRX MAC CE, halt DRX monitoring period and inactivity timers for cells operating on the first and the second frequency resources; and

restart a DRX short cycle timer for the cells operating on the first and the second frequency resources.

24. The apparatus of claim 16 , wherein the one or more processors are further configured to:

receive a DRX media access control (MAC) control element (CE) from one of a plurality of cells; and

halt DRX monitoring period and inactivity timers for cells operating on one of the first or second frequency resources based on a frequency band of the one of the plurality of cells from which the DRX MAC CE was received.

25. The apparatus of claim 16 , wherein the one or more processors are further configured to:

receive a DRX media access control (MAC) control element (CE) from one of a plurality of cells, the DRX MAC CE including an indication of cells for which the DRX MAC CE is applicable; and

responsive to receiving the DRX MAC CE, halt DRX monitoring period and inactivity timers for the indicated cells.

26. The apparatus of claim 16 , wherein the one or more processors are further configured to:

report channel state information (CSI) to a plurality of cells, wherein reported CSI for cells operating on the first frequency resources is not multiplexed with reported CSI for cells operating on the second frequency resources.

27. The apparatus of claim 16 , wherein the one or more processors are further configured to:

report channel state information (CSI) to a plurality of cells, wherein the reported CSI comprises padding bits for cells associated with a frequency band for which the UE is not monitoring based on expiry of a DRX timer.

28. The apparatus of claim 16 , wherein the one or more processors are further configured to:

report channel state information (CSI) to a plurality of cells based on a network-configured coding rate for reporting CSI for cells operating on frequency bands which the UE is not monitoring based on expiry of a DRX timer.

29. The apparatus of claim 16 , wherein the one or more processors are further configured to:

start a short DRX cycle timer when a DRX inactivity timer associated with the first group of cells expires and a DRX inactivity timer associated with the second group of cells is not running.

30. The apparatus of claim 16 , wherein the one or more processors are further configured to:

start a short DRX cycle timer for the first group of cells based on expiry of a DRX inactivity timer associated with the first group of cells; and

start a short DRX cycle timer for the second group of cells based on expiry of a DRX inactivity timer associated with the second group of cells.

31. An apparatus for wireless communications by a user equipment (UE), comprising:

means for receiving first discontinuous reception (DRX) configuration parameters for communications with a first group of cells and second DRX configuration parameters for communications with a second group of cells, wherein the first DRX configuration parameters and the second DRX configuration parameters share common starting time parameters;

means for monitoring for communications by the first group of cells operating in first frequency resources based on the first DRX configuration parameters; and

means for monitoring for communications by the second group of cells operating in second frequency resources based on the second DRX configuration parameters,

wherein the first and second DRX configuration parameters include a common short DRX cycle timer such that the UE operates in a same DRX cycle for the first group of cells operating in the first frequency resources and the second group of cells operating in the second frequency resources, wherein the first group of cells comprises a first group of serving cells, and wherein the second group of cells comprises a second group of serving cells.

32. The apparatus of claim 31 , wherein the first frequency resources comprise a first set of frequency bands and the second frequency resources comprise a second set of frequency bands.

33. The apparatus of claim 31 , wherein:

the first and second DRX configuration parameters are set based on the first frequency resources and the second frequency resources such that a monitoring period is shorter for a higher frequency resource than for a lower frequency resource.

34. The apparatus of claim 31 , wherein:

the first and second DRX configuration parameters comprise a same starting offset and a long DRX cycle duration.

35. The apparatus of claim 31 , wherein the first DRX configuration parameters include a first short DRX cycle timer and the second DRX configuration parameters include a second short DRX cycle timer, and wherein a length of the first and second short DRX cycle timers is set based on the first frequency resources and the second frequency resources.

36. The apparatus of claim 31 , further comprising:

means for triggering a scheduling request with respect to a cell; and

means for activating, responsive to triggering the scheduling request, DRX for serving cells configured with the first DRX configuration parameters but not configured with the second DRX configuration parameters.

37. The apparatus of claim 31 , further comprising:

means for triggering a scheduling request with respect to a cell; and

means for activating, responsive to triggering the scheduling request, DRX using the first DRX parameters or the second DRX parameters based on a frequency band in which the cell operates.

38. The apparatus of claim 31 , further comprising:

means for receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells;

means for halting, responsive to receiving the DRX MAC CE, DRX monitoring period and inactivity timers for cells operating on the first and the second frequency resources; and

means for restarting a DRX short cycle timer for the cells operating on the first and the second frequency resources.

39. The apparatus of claim 31 , further comprising:

means for receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells; and

means for halting DRX monitoring period and inactivity timers for cells operating on one of the first or second frequency resources based on a frequency band of the one of the plurality of cells from which the DRX MAC CE was received.

40. The apparatus of claim 31 , further comprising:

means for receiving a DRX media access control (MAC) control element (CE) from one of a plurality of cells, the DRX MAC CE including an indication of cells for which the DRX MAC CE is applicable; and

means for halting, responsive to receiving the DRX MAC CE, DRX monitoring period and inactivity timers for the indicated cells.

41. The apparatus of claim 31 , further comprising:

means for reporting channel state information (CSI) to a plurality of cells, wherein reported CSI for cells operating on the first frequency resources is not multiplexed with reported CSI for cells operating on the second frequency resources.

42. The apparatus of claim 31 , further comprising:

means for reporting channel state information (CSI) to a plurality of cells, wherein the reported CSI comprises padding bits for cells associated with a frequency band for which the UE is not monitoring based on expiry of a DRX timer.

43. The apparatus of claim 31 , further comprising:

means for reporting channel state information (CSI) to a plurality of cells based on a network-configured coding rate for reporting CSI for cells operating on frequency bands which the UE is not monitoring based on expiry of a DRX timer.

44. The apparatus of claim 31 , further comprising:

means for starting a short DRX cycle timer when a DRX inactivity timer associated with the first group of cells expires and a DRX inactivity timer associated with the second group of cells is not running.

45. The apparatus of claim 31 , further comprising:

means for starting a short DRX cycle timer for the first group of cells based on expiry of a DRX inactivity timer associated with the first group of cells; and

means for starting a short DRX cycle timer for the second group of cells based on expiry of a DRX inactivity timer associated with the second group of cells.

46. A non-transitory computer-readable medium having instructions stored thereon which, when executed by a processor, performs an operation for wireless communications by a user equipment (UE), the operation comprising:

receiving first discontinuous reception (DRX) configuration parameters for communications with a first group of cells and second DRX configuration parameters for communications with a second group of cells, wherein the first DRX configuration parameters and the second DRX configuration parameters share common starting time parameters;

monitoring for communications by the first group of cells operating in first frequency resources based on the first DRX configuration parameters; and

monitoring for communications by the second group of cells operating in second frequency resources based on the second DRX configuration parameters,

wherein the first and second DRX configuration parameters include a common short DRX cycle timer such that the UE operates in a same DRX cycle for the first group of cells operating in the first frequency resources and the second group of cells operating in the second frequency resources, wherein the first group of cells comprises a first group of serving cells, and wherein the second group of cells comprises a second group of serving cells.