FIG. 14 is a flow chart 1400 according to one exemplary embodiment from the perspective of a UE. In step 1405, the UE performs UL transmission with a cell via a first TRP and a second TRP. For example, the UL transmission with the cell may comprise one or more UL transmissions, to the cell, via the first TRP and one or more UL transmissions, to the cell, via the second TRP. In step 1410, the UE triggers a PHR. In step 1415, the UE generates a MAC CE in response to the PHR (e.g., in response to triggering the PHR), wherein the UE indicates a first PH associated with the first TRP and a second PH associated with the second TRP in the MAC CE (e.g., the UE includes an indication of the first PH and an indication of the second PH in the MAC CE). In step 1420, the UE transmits the MAC CE to a network. Alternatively and/or additionally, the UE may transmit the MAC CE to the cell or to a second cell.
In one embodiment, the MAC CE is a PHR MAC CE.
In one embodiment the cell is a PCell.
In one embodiment, the MAC CE does not comprise and/or does not indicate PH associated with other cells other than the cell. For example, the MAC CE may indicate PH only for the cell.
In one embodiment, the MAC CE is a fixed size. For example, a size of the MAC CE may be fixed and/or may be based on a configuration which with the UE is configured (e.g., the configuration may be indicative of the fixed size).
