Devices and methods for controlling discontinuous reception in new radio

1. A method for discontinuous reception (DRX), the method comprising:

receiving, by receiving circuitry of a User Equipment (UE), a Radio Resource Control (RRC) message having a DRX Start Offset (drx-StartOffset) and a DRX Slot Offset (drxStartOffset_slot);

determining, by processing circuitry of the UE, a start subframe based on the drx-StartOffset; and

determining, by the processing circuitry, a starting time of a DRX On-Duration Timer (drx-onDurationTimer) in the start subframe based on the drxStartOffset_slot, wherein the drxStartOffset_slot has an actual time unit.

2. The method of claim 1 , further comprising:

receiving, by the receiving circuitry, a system frame number (SFN) and a Short DRX cycle (drx-ShortCycle);

determining, by the processing circuitry, a subframe number;

starting, by the processing circuitry, the drx-onDurationTimer after the drxStartOffset_slot from a beginning of the start subframe, when [(SFN×10)+subframe number] modulo (drx-ShortCycle)=(drx-StartOffset) modulo (drx-ShortCycle).

3. The method of claim 1 , further comprising:

receiving, by the receiving circuitry, a system frame number (SFN) and a Long DRX cycle (drx-LongCycle);

determining, by the processing circuitry, a subframe number;

starting, by the processing circuitry, the drx-onDurationTimer after the drxStartOffset_slot from a beginning of the start subframe, when [(SFN×10)+subframe number] modulo (drx-LongCycle)=drx-StartOffset.

4. The method of claim 1 , wherein the actual time unit is an actual time value corresponding to one or more slots, a fraction of one or more slots.

5. The method of claim 1 , wherein the actual time unit is in milliseconds or a fraction of a millisecond.

6. The method of claim 1 , further comprising:

receiving, by the receiving circuitry, an indication of a new transmission over a physical downlink control channel (PDCCH);

starting or restarting, by the processing circuitry, a DRX Inactivity Timer (drx-InactivityTimer) in a first symbol after an end of the PDCCH reception.

7. A user equipment (UE) comprising:

receiving circuitry configured to receive a Radio Resource Control (RRC) message having a DRX Start Offset (drx-StartOffset) and a DRX Slot Offset (drxStartOffset_slot);

processing circuitry configured to:

determine a start subframe based on the drx-StartOffset;

determine a starting time of a DRX On-Duration Timer (drx-onDurationTimer) in the start subframe based on the drxStartOffset_slot, wherein the drxStartOffset_slot has an actual time unit.

8. The UE of claim 7 , wherein:

the receiving circuit is further configured to receive a system frame number (SFN) and a Short DRX cycle (drx-ShortCycle);

the processing circuitry is further configured to:

determine a subframe number;

start the drx-onDurationTimer after the drxStartOffset_slot from a beginning of the start subframe, when [(SFN×10)+subframe number] modulo (drx-ShortCycle)=(drx-StartOffset) modulo (drx-ShortCycle).

9. The UE of claim 7 , wherein:

the receiving circuit is further configured to receive a system frame number (SFN) and a Long DRX cycle (drx-LongCycle);

the processing circuitry is further configured to:

determine a subframe number;

start the drx-onDurationTimer after the drxStartOffset_slot from a beginning of the start subframe, when [(SFN×10)+subframe number] modulo (drx-LongCycle)=drx-StartOffset.

10. The UE of claim 7 , wherein the actual time unit is an actual time value corresponding to one or more slots, a fraction of one or more slots.

11. The UE of claim 7 , wherein the actual time unit is in milliseconds or a fraction of a millisecond.

12. The UE of claim 7 , wherein:

the receiving circuitry is further configured to receive an indication of a new transmission over a physical downlink control channel (PDCCH);

the processing circuitry is further configured to start a DRX Inactivity Timer (drx-Inactivity Timer) in a first symbol after an end of the PDCCH.