Patent ID: 8818441

Claim:
A method of transmit power control in a wireless transmit/receive unit (WTRU), capable of simultaneous transmission via multiple uplink (UL) component carriers (CCs), the method comprising: comparing by the WTRU a transmit power of a first UL CC to a first UL CC-specific maximum transmit power, wherein the first UL CC has a first UL CC priority and the first UL CC carries a first channel having a first channel priority; comparing by the WTRU a transmit power of a second UL CC to a second UL CC-specific maximum transmit power, wherein the second UL CC has a second UL CC priority and the second UL CC carries a second channel having a second channel priority; comparing by the WTRU a transmit power difference between the first UL CC, and the second UL CC to a maximum CC transmit power difference; raising or lowering by the WTRU a transmit power of the first UL CC or the second UL CC to keep the transmit power difference below the maximum CC transmit power difference, wherein the raising or lowering is based on at least one channel priority of a respective at least one channel transmitted over at least one of the first UL CC and the second UL CC, and further wherein the raising or lowering keeps the transmit power of the first UL CC below the first UL CC-specific maximum transmit power and keeps the transmit power of the second UL CC below the second UL CC-specific maximum transmit power, wherein the first UL CC-specific maximum transmit power is different than the second UL CC-specific maximum transmit power; and simultaneously transmitting the first channel via the first UL CC and the second channel via the second UL CC.