Devices and methods for discontinuous reception in new radio

1. A method for a user equipment (UE) for performing a discontinuous reception (DRX) operation, the method comprising:

receiving, at the UE, via a radio resource control (RRC) signaling, a first DRX configuration for configuring a first DRX parameter having a fixed time unit;

receiving, at the UE, via the RRC signaling, a second DRX configuration for configuring a second DRX parameter having a scalable time unit;

performing the DRX operation based on the configured first and second DRX parameters;

receiving downlink control information (DCI) that indicates a transport block reception on a bandwidth part (BWP); and

determining a time duration of the second DRX parameter based on a slot length of the BWP.

2. The method of claim 1 , wherein the fixed time unit comprises one of a millisecond and a sub-millisecond, and the scalable time unit comprises one of a slot and a symbol.

3. The method of claim 1 , wherein at least one of the first and second DRX parameters includes one of a drx-onDurationTimer, a drx-ShortCycle, a drx-LongCycleStartOffset, a drx-InactivityTimer, a drx-HARQ-RTT-TimerDL, a drx-HARQ-RTT-TimerUL, a drx-RetransmissionTimerDL, and a drx-RetransmissionTimerUL.

4. The method of claim 1 , wherein receiving the second DRX configuration comprises receiving the second DRX configuration over one of a physical downlink control channel (PDCCH) and a group common (GC)-PDCCH.

5. The method of claim 4 , wherein a time duration of the second DRX parameter is determined based on one of slot/symbol format information (SFI) and a radio resource format indication in one of the PDCCH and the GC-PDCCH.

6. The method of claim 1 , wherein

the first DRX parameter is configured based on an ON/OFF cycle of the DRX operation; and

the second DRX parameter is reconfigurable, and is received by the UE during one or more ON cycles of the DRX operation.

7. A method for a base station for providing discontinuous reception (DRX) configuration to a user equipment (UE) to perform a DRX operation, the method comprising:

transmitting, by the base station, via a radio resource control (RRC) signaling, a first DRX configuration to the UE for configuring a first DRX parameter having a fixed time unit;

transmitting, by the base station, via the RRC signaling, a second DRX configuration for configuring a second DRX parameter having a scalable time unit, wherein the UE performs the DRX operation based on the configured first and second DRX parameters; and

transmitting downlink control information (DCI) that indicates a transport block reception on a bandwidth part (BWP), wherein the UE determines a time duration of the second DRX parameter based on a slot length of the BWP.

8. The method of claim 7 , wherein the fixed time unit comprises one of a millisecond and a sub-millisecond, and the scalable time unit comprises one of a slot and a symbol.

9. The method of claim 7 , wherein at least one of the first and second DRX parameters includes one of a drx-onDurationTimer, a drx-ShortCycle, a drx-LongCycleStartOffset, a drx-InactivityTimer, a drx-HARQ-RTT-TimerDL, a drx-HARQ-RTT-TimerUL, a drx-RetransmissionTimerDL, and a drx-RetransmissionTimerUL.

10. The method of claim 7 , wherein transmitting the second DRX configuration comprises transmitting the second DRX configuration over one of a physical downlink control channel (PDCCH) and a group common (GC)-PDCCH.

11. The method of claim 10 , wherein a time duration of the second DRX parameter is determined based on one of slot/symbol format information (SFI) and a radio resource format indication in one of the PDCCH and the GC-PDCCH.

12. The method of claim 7 , wherein

the first DRX parameter is configured based on an ON/OFF cycle of the DRX operation; and

the second DRX parameter is reconfigurable, and is received by the UE during one or more ON cycles of the DRX operation.