Power control for simultaneous PUSCH to multiple TRP

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

determining to send a first power headroom report (PHR) and a second PHR;

receiving a resource allocation for a physical uplink shared channel (PUSCH), wherein the PUSCH is transmitted using a first spatial domain filter corresponding to a first transmission/reception point (TRP) and a second spatial domain filter corresponding to a second TRP;

determining the first PHR based on an actual transmission for the PUSCH and a first maximum transmit power corresponding to the first TRP;

determining the second PHR based on the actual transmission for the PUSCH and a second maximum transmit power corresponding to the second TRP;

including the first PHR, the first maximum transmit power, the second PHR, and the second maximum transmit power in a MAC control element (MAC CE); and

transmitting the PUSCH including the MAC CE.

2 . The method of claim 1 , further comprising:

wherein the determination to send the first PHR and the second PHR is made when an RRC configuration is received by the UE.

3 . The method of claim 1 , further comprising:

measuring a first group of pathloss reference signals corresponding to the first TRP and a second group of pathloss reference signals corresponding to the second TRP;

determining to send the first PHR corresponding to the first TRP and the second PHR corresponding to the second TRP, when (a) a first trigger condition is met based on the measurements of the first group of pathloss reference signals or (b) a second trigger condition is met based on the measurements of the second group of pathloss reference signals.

4 . The method of claim 3 , wherein the first group of pathloss reference signals corresponding to the first TRP are determined from transmission configuration indicator (TCI) states corresponding to the first TRP.

5 . The method of claim 3 , wherein the second group of pathloss reference signals corresponding to the second TRP are determined from TCI states corresponding to the second TRP.

6 . A method of wireless communication of user equipment (UE), comprising

determining to send a first power headroom report (PHR) and a second PHR;

receiving a resource allocation for a physical uplink shared channel (PUSCH), wherein the PUSCH is transmitted using a first spatial domain filter corresponding to a first transmission/reception point (TRP);

determining the first PHR based on an actual transmission for the PUSCH and a first maximum transmit power corresponding to the first TRP;

determining the second PHR based on a reference transmission and a second maximum transmit power corresponding to the second TRP;

including the first PHR, the first maximum transmit power, the second PHR, and the second maximum transmit power in a MAC control element (MAC CE); and

transmitting the PUSCH including the MAC CE.

7 . A method of wireless communication of user equipment (UE) comprising

determining to send a first power headroom report (PHR) and a second PHR;

receiving a resource allocation for a physical uplink shared channel (PUSCH), wherein the PUSCH is transmitted using neither a first spatial domain filter corresponding to a first transmit reception point (TRP), nor a second spatial domain filter corresponding to a second TRP;

determining the first PHR based on a reference transmission and a first maximum transmit power corresponding to the first TRP;

determining the second PHR based on a reference transmission and a second maximum transmit power corresponding to the second TRP;

including the first PHR, the first maximum transmit power, the second PHR, and the second maximum transmit power in a MAC control element (MAC CE); and

transmitting the PUSCH including the MAC CE.

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 a resource allocation for a physical uplink shared channel (PUSCH), wherein the PUSCH is transmitted using a first spatial domain filter corresponding to a first transmission/reception point (TRP) and a second spatial domain filter corresponding to a second TRP;

determine to send a first power headroom report (PHR) and a second PHR;

determine the first PHR based on an actual transmission for the PUSCH and a first maximum transmit power corresponding to the first TRP;

determine the second PHR based on the actual transmission for the PUSCH and a second maximum transmit power corresponding to the second TRP;

include the first PHR, the first maximum transmit power, and the second PHR, and the second maximum transmit power in a MAC control element (MAC CE); and

transmit the PUSCH including the MAC CE.

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

determine to send the first PHR and the second PHR when an RRC configuration is received by the UE.

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

determine to send a first power headroom report (PHR) and a second PHR;

receive a resource allocation for a physical uplink shared channel (PUSCH), wherein the PUSCH is transmitted using a first spatial domain filter corresponding to a first transmission/reception point (TRP) and a second spatial domain filter corresponding to a second TRP;

determine the first PHR based on an actual transmission for the PUSCH and a first maximum transmit power corresponding to the first TRP;

determine the second PHR based on the actual transmission for the PUSCH and a second maximum transmit power corresponding to the second TRP;

include the first PHR, the first maximum transmit power, and the second PHR, and the second maximum transmit power in a MAC control element (MAC CE); and

transmit the PUSCH including the MAC CE.