Method and apparatus for handling uplink transmissions using multiple uplink carriers
A method and an apparatus for uplink transmission using multiple uplink carriers are disclosed. A wireless transmit/receive unit (WTRU) selects a dedicated channel medium access control (MAC-d) flow with highest priority data to be transmitted and performs uplink carrier selection and enhanced dedicated channel (E-DCH) transport format combination (E-TFC) restriction and selection to select a carrier among a plurality of carriers and select an E-TFC based on a maximum supported payload, a remaining scheduled grant payload of the selected carrier and a remaining non-scheduled grant payload. The WTRU then generates a medium access control (MAC) protocol data unit (PDU) for E-DCH transmission via the selected carrier based on the selected E-TFC.
1. A method implemented in a wireless transmit/receive unit (WTRU) for uplink transmission using multiple uplink carriers, the method comprising:
determining that more than one uplink carrier is activated;
determining that a first uplink carrier is associated with a retransmission and a second uplink carrier is associated with a transmission;
calculating a remaining power associated with the transmission by subtracting from a maximum allowed transmit power a power required for a dedicated physical control channel (DPCCH) power for each uplink carrier, a power required for a high speed dedicated physical control channel (HS-DPCCH), a power required for an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) for the retransmission, and a power required for an E-DCH dedicated physical control channel (E-DPCCH) for the retransmission;
calculating a normalized remaining power margin by:
subtracting from the remaining power a power required for an E-DCH dedicated physical control channel (E-DPCCH) for the second uplink carrier, and
dividing a result by a power required for a dedicated physical control channel (DPCCH) associated with the second uplink carrier; and
performing an E-DCH transport format combination (E-TFC) selection.
2. The method of claim 1 , wherein the subtraction from the remaining power provides the result.
3. The method of claim 1 , wherein the normalized remaining power margin is available for the E-TFC selection for an E-TFC candidate j.
4. The method of claim 1 , wherein the E-TFC selection relates to the transmission.
5. A wireless transmit/receive unit (WTRU) for uplink transmission using multiple uplink carriers, the WTRU comprising:
a processor configured to:
determine that more than one uplink carrier is activated;
determine that a first uplink carrier is associated with a retransmission and a second uplink carrier is associated with a transmission;
calculate a remaining power associated with the transmission by subtracting from a maximum allowed transmit power a power required for a dedicated physical control channel (DPCCH) power for each uplink carrier, a power required for a high speed dedicated physical control channel (HS-DPCCH), a power required for an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) for the retransmission, and a power required for an E-DCH dedicated physical control channel (E-DPCCH) for the retransmission;
calculate a normalized remaining power margin by being further configured to:
subtract from the remaining power a power required for an E-DCH dedicated physical control channel (E-DPCCH) for the second uplink carrier, and
divide a result by a power required for a dedicated physical control channel (DPCCH) associated with the second uplink carrier; and
perform an E-DCH transport format combination (E-TFC) selection.
6. The WTRU of claim 5 , wherein the subtraction from the remaining power provides the result.
7. The WTRU of claim 5 , wherein the normalized remaining power margin is available for the E-TFC selection for an E-TFC candidate j.
8. The WTRU of claim 5 , wherein the E-TFC selection relates to the transmission.