Wake-up signal operation for UE power saving

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

receiving, at the UE, one or more modulation symbols on one or more resource elements prior to an ON duration in a particular discontinuous reception (DRX) cycle in Radio Resource Control (RRC) connected mode, the one or more resource elements being allocated to carry a wake-up signal;

determining that the one or more resource elements are not in an active time duration of a DRX cycle;

in response to the determination that the one or more resource elements are not in the active time duration, performing, at the UE, a blind detection of the wake-up signal on the one or more modulation symbols in accordance with a first downlink control information (DCI) format and a group identifier identifying a group of UEs including the UE, the wake-up signal including an indication that indicates whether one or more UEs of the group of UEs should monitor a down link control channel in the ON duration; and

determining, at the UE, whether to operate in a normal state and monitor the down link control channel in the ON duration based on the wake-up signal when the wake-up signal is detected.

2. The method of claim 1 , further comprising:

prior to the performing the blind detection, determining that the particular DRX cycle is a long DRX cycle, wherein the blind detection is performed in response to the determination.

3. The method of claim 2 , wherein the performing the blind detection is associated with the long DRX cycle.

4. The method of claim 1 , wherein the one or more resource elements are on a primary component carrier or a primary secondary component carrier of a plurality of component carriers.

5. The method of claim 1 , further comprising:

receiving a first configuration indicating a first size of a first payload in accordance with the first DCI format when carried by the one or more modulation symbols; and

configuring the UE to perform the blind detection based on the first size.

6. The method of claim 1 , further comprising:

receiving a second configuration indicating an offset; and

starting monitoring the wake-up signal at the offset prior to the ON duration of the particular DRX cycle.

7. The method of claim 1 , wherein the wake-up signal further includes an update of Transmission Configuration Indication (TCI) states.

8. 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:

receive, at the UE, one or more modulation symbols on one or more resource elements prior to an ON duration in a particular discontinuous reception (DRX) cycle in Radio Resource Control (RRC) connected mode, the one or more resource elements being allocated to carry a wake-up signal;

determine that the one or more resource elements are not in an active time duration of a DRX cycle;

in response to the determination that the one or more resource elements are not in the active time duration, perform, at the UE, a blind detection of the wake-up signal on the one or more modulation symbols in accordance with a first downlink control information (DCI) format and a group identifier identifying a group of UEs including the UE, the wake-up signal including an indication that indicates whether one or more UEs of the group of UEs should monitor a down link control channel in the ON duration; and

determine, at the UE, whether to operate in a normal state and monitor the down link control channel in the ON duration based on the wake-up signal when the wake-up signal is detected.

9. The apparatus of claim 8 , wherein the at least one processor is further configured to:

prior to the performing the blind detection, determine that the particular DRX cycle is a long DRX cycle, wherein the blind detection is performed in response to the determination.

10. The apparatus of claim 9 , wherein the performing the blind detection is associated with the long DRX cycle.

11. The apparatus of claim 8 , wherein the one or more resource elements are on a primary component carrier or a primary secondary component carrier of a plurality of component carriers.

12. The apparatus of claim 8 , wherein the at least one processor is further configured to:

receive a first configuration indicating a first size of a first payload in accordance with the first DCI format when carried by the one or more modulation symbols; and

configure the UE to perform the blind detection based on the first size.

13. The apparatus of claim 8 , wherein the at least one processor is further configured to:

receive a second configuration indicating an offset; and

start monitoring the wake-up signal at the offset prior to the ON duration of the particular DRX cycle.

14. The apparatus of claim 8 , wherein the wake-up signal further includes an update of Transmission Configuration Indication (TCI) states.

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

receive, at the UE, one or more modulation symbols on one or more resource elements prior to an ON duration in a particular discontinuous reception (DRX) cycle in Radio Resource Control (RRC) connected mode, the one or more resource elements being allocated to carry a wake-up signal;

determine that the one or more resource elements are not in an active time duration of a DRX cycle;

in response to the determination that the one or more resource elements are not in the active time duration, perform, at the UE, a blind detection of the wake-up signal on the one or more modulation symbols in accordance with a first downlink control information (DCI) format and a group identifier identifying a group of UEs including the UE, the wake-up signal including an indication that indicates whether one or more UEs of the group of UEs should monitor a down link control channel in the ON duration; and

determine, at the UE, whether to operate in a normal state and monitor the down link control channel in the ON duration based on the wake-up signal when the wake-up signal is detected.

16. The non-transitory computer-readable medium of claim 15 , wherein the code is further configured to:

prior to the performing the blind detection, determine that the particular DRX cycle is a long DRX cycle, wherein the blind detection is performed in response to the determination.

17. The non-transitory computer-readable medium of claim 16 , wherein the performing the blind detection is associated with the long DRX cycle.