Triggering adaptation mechanisms for UE power-saving

1. A method of wireless communication of a first user equipment (UE), comprising:

attempting to detect a Layer 1 signaling prior to an ON duration of a discontinuous reception (DRX) cycle of the UE, the Layer 1 signaling carrying a trigger event that is a power configuration message;

determining values of a first set of power configuration parameters when the trigger event is detected; and

transmitting or receiving signals in accordance with the values of the first set of power configuration parameters.

2. The method of claim 1 , wherein the power configuration message includes an indication of a bandwidth part to which the first UE is to be switched.

3. The method of claim 1 , wherein the power configuration message includes an indication of the values of the first set of power configuration parameters.

4. The method of claim 3 , wherein when the Layer 1 signaling is detected prior to an ON duration of a discontinuous reception (DRX) cycle of the UE, the power configuration message further includes a wake-up indication.

5. The method of claim 4 , wherein the wake-up indication indicates that the first UE stays awake in the ON duration in a discontinuous reception (DRX) cycle subsequent to the Layer 1 signaling.

6. The method of claim 1 , wherein the power configuration message is contained in first downlink control information data received by the first UE through a down link control channel.

7. The method of claim 6 , wherein a format of the Layer 1 signaling includes a field used to carry the power configuration message.

8. The method of claim 6 , wherein the down link control channel is directed to a group of UEs including the first UE.

9. The method of claim 8 , wherein the down link control channel contains respective, separate downlink control information data directed to each respective one UE of the group of UEs, wherein the first downlink control information data are the respective, separate downlink control information data directed to the first UE.

10. The method of claim 6 , wherein the down link control channel is directed to the first UE specifically.

11. The method of claim 6 , wherein the down link control channel is carried in a Type3-PDCCH common search space.

12. The method of claim 1 , further comprising

receiving the Layer 1 signaling prior to an ON duration in a discontinuous reception (DRX) cycle in Radio Resource Control (RRC) connected mode, wherein the power configuration message contained in the Layer 1 signaling includes a wake-up indication indicating whether data are to be transmitted to the first UE in the ON duration.

13. The method of claim 12 , further comprising

determining whether to monitor a down link control channel in the ON duration based on the wake-up indication.

14. The method of claim 1 , wherein the attempting to detect the Layer 1 signaling includes:

determining a first set of resource elements allocated for the Layer 1 signaling; and

decoding symbols carried in the first set of resource elements to obtain the Layer 1 signaling.

15. The method of claim 14 , wherein the symbols carried in the first set of resource elements are decoded based on a Radio Network Temporary Identifier (RNTI) dedicated for power configuration.

16. The method of claim 14 , further comprising:

determining whether a discontinuous reception (DRX) is in active time at the first set of resource elements, wherein the decoding the symbols is performed when the DRX is not in active time; and

refraining from decoding the symbols when the DRX is in active time.

17. The method of claim 14 , further comprising:

determining frequency location and time location of a monitoring window for detecting the Layer 1 signaling; and

determining one or more monitoring occasions within the monitoring window, wherein the first set of resource elements constitutes one of the one or more monitoring occasions, wherein the attempting to detect the Layer 1 signaling includes decoding symbols at the one or more monitoring occasions.

18. The method of claim 17 , further comprising:

wherein the time location of the monitoring window is indicated by an offset from an initial slot of a corresponding ON duration in a discontinuous reception (DRX) cycle.

19. An apparatus for wireless communication, the apparatus being a user equipment (UE), comprising:

a memory; and

at least one processor coupled to the memory and configured to:

attempt to detect a Layer 1 signaling prior to an ON duration of a discontinuous reception (DRX) cycle of the UE, the Layer 1 signaling carrying a trigger event that is a power configuration message;

determine values of a first set of power configuration parameters when the trigger event is detected; and

transmit or receive signals in accordance with the values of the first set of power configuration parameters.

20. A non-transitory computer-readable medium storing computer executable code for wireless communication of a user equipment (UE), comprising code to:

attempt to detect a Layer 1 signaling prior to an ON duration of a discontinuous reception (DRX) cycle of the UE, the Layer 1 signaling carrying a trigger event that is a power configuration message;

determine values of a first set of power configuration parameters when the trigger event is detected; and

transmit or receive signals in accordance with the values of the first set of power configuration parameters.