User equipment and method of wireless communication of same

1. A user equipment for wireless communication, comprising:

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver;

wherein the processor is configured to:

obtain a representation of a transmit (Tx) power for the user equipment by a network configuration, a pre-configuration to the user equipment, or a pre-store in the user equipment according to a pre-defined rule, wherein the representation of the Tx power for the user equipment provides a division of a range of output power for the user equipment into different granular scales of power information,

wherein the different granular scales of power information comprise a large-scale power information and a small-scale power information, a quantization step size of the large-scale power information is greater than a quantization step size of the small-scale power information,

wherein the processor is configured to indicate, to another user equipment, the Tx power for the user equipment in two separate components using a two-part indication.

2. The user equipment of claim 1 , wherein a first part of the two-part indication comprises the large-scale power information, a second part of the two-part indication comprises the small-scale power information, and the two-part indication is delivered using a two-stage sidelink control information (SCI).

3. The user equipment of claim 2 , wherein a first stage SCI of the two-stage SCI is transmitted in a physical sidelink control channel (PSCCH), a second stage SCI of the two-stage SCI is transmitted in a physical sidelink shared channel (PSSCH), the first part of the two-part indication is encoded as a part of first stage SCI of the two-stage SCI, and the second part of the two-part indication is encoded as a part of second stage SCI of the two-stage SCI.

4. The user equipment of claim 1 , wherein the two-part indication is a hybrid indication which uses a demodulation reference signal (DMRS) of a PSCCH or a PSSCH to carry a first part of the two-part indication and a SCI to carry a second part of the two-part indication.

5. The user equipment of claim 4 , wherein when the first part of the two-part indication is carried by the DMRS, the Tx power for the user equipment is represented as a part of initialization for a DMRS scrambling sequence generation.

6. The user equipment of claim 4 , wherein when the second part of the two-part indication is carried by the SCI, the Tx power for the user equipment is provided by a parameter field in a SCI format to be encoded and transmitted in the PSCCH over a single-stage SCI or the two-stage SCI, or the Tx power for the user equipment is provided by a parameter field in a SCI format to be encoded and transmitted in the PSSCH over the two-stage SCI.

7. The user equipment of claim 4 , wherein the first part of the two-part indication is used to represent one of the large-scale power information and the small-scale power information, and the second part of the two-part indication is used to represent another of the large-scale power information and the small-scale power information.

8. The user equipment of claim 1 , wherein the two-part indication is a hybrid indication, and a first part of the two-part indication and a second part of the two-part indication are time domain multiplexed.

9. The user equipment of claim 8 , wherein the first part of the two-part indication is sent periodically via a SCI, a medium access control-control element (MAC-CE), or a radio resource control (RRC) over a sidelink interface.

10. The user equipment of claim 9 , wherein the first part of the two-part indication comprises the large-scale power information.

11. The user equipment of claim 9 , wherein when the first part of the two-part indication is sent via the SCI, the Tx power for the user equipment is represented as a parameter field in a SCI format, and when the first part of the two-part indication is sent via the MAC-CE or the RRC, the Tx power for the user equipment is encoded and transmitted in a PSSCH.

12. The user equipment of claim 8 , wherein the second part of the two-part indication comprises the small-scale power information.

13. The user equipment of claim 8 , wherein the second part of the two-part indication is sent periodically or aperiodic as a parameter field in a SCI format.

14. A method of wireless communication of a user equipment, comprising:

obtaining a representation of a transmit (Tx) power for the user equipment by a network configuration, a pre-configuration to the user equipment, or a pre-store in the user equipment according to a pre-defined rule, wherein the representation of the Tx power for the user equipment provides a division of a range of output power for the user equipment into different granular scales of power information,

wherein the different granular scales of power information comprise a large-scale power information and a small-scale power information, a quantization step size of the large-scale power information is greater than a quantization step size of the small-scale power information,

wherein the method further comprises indicating, to another user equipment, the Tx power for the user equipment in two separate components using a two-part indication.

15. The method of claim 14 , wherein a first part of the two-part indication comprises the large-scale power information, a second part of the two-part indication comprises the small-scale power information, and the two-part indication is delivered using a two-stage sidelink control information (SCI).

16. The method of claim 15 , wherein a first stage SCI of the two-stage SCI is transmitted in a physical sidelink control channel (PSCCH), a second stage SCI of the two-stage SCI is transmitted in a physical sidelink shared channel (PSSCH), the first part of the two-part indication is encoded as a part of first stage SCI of the two-stage SCI, and the second part of the two-part indication is encoded as a part of second stage SCI of the two-stage SCI.