Power headroom reporting by wireless transmit/receive unit supporting simultaneous multi-panel transmission

A wireless transmit/receive unit (WTRU) comprising a memory and processor, the memory and processor configured to:

• send capability information indicating that the WTRU is configured to support simultaneous multi-panel (SMP) transmission;
• determine that a power headroom report (PHR) has been triggered;
• receive downlink control information (DCI) comprising uplink grant information, the DCI indicating a multi-panel (MP) mode of operation;
• determine power headroom (PH) values for the PHR, wherein the PH values comprise a first PH value for a panel associated with a single panel PHR trigger and a second PH value associated with SMP operation, and wherein the PH values are determined based on at least the multi-panel mode of operation indicated in the DCI and whether the PHR was triggered based on an SMP pathloss (PL) determination;
• and
• send the PHR comprising the PH values.

A method performed by a Wireless Transmit/Receive Unit (WTRU), the method comprising:

• sending capability information indicating that the WTRU is configured to support simultaneous multi-panel (SMP) transmission;
• determining that a power headroom report (PHR) has been triggered;
• receiving downlink control information (DCI) comprising uplink grant information, the DCI indicating a multi-panel (MP) mode of operation;
• determining power headroom (PH) values for the PHR, wherein the PH values comprise a first PH value for a panel associated with a single panel PHR trigger and a second PH value associated with SMP operation, and wherein the one or more PH values are determined based on at least the multi-panel mode of operation indicated in the DCI and whether the PHR was triggered based on an SMP pathloss (PL) determination;
• and
• sending the PHR comprising the PH values.