Method and apparatus for power control for wireless transmissions on multiple component carriers associated with multiple timing advances

A wireless transmit/receive unit (WTRU) for power control for wireless transmissions on multiple component carriers corresponding to multiple serving cells associated with multiple timing advances, the WTRU comprising:

• a processor configured to determine transmit powers for at least a first physical channel for a first serving cell in a first timing advanced group (TAG) and a second physical channel for a second serving cell in a second TAG, wherein the first TAG is less timing advanced than the second TAG;
• the processor configured to determine a WTRU configured maximum output power (PCMAX) for an overlapping portion, wherein the overlapping portion is a portion of a transmission of the first physical channel in a first subframe that overlaps in time with a portion of a transmission of the second physical channel in a next subframe;
• and
• the processor operatively coupled to a transceiver, the processor and the transceiver configured to adjust at least one of the first and second physical channels and to transmit the first and second physical channels such that a sum of the transmit powers of the physical channels in the overlapping portion does not exceed the determined PCMAX for the overlapping portion.