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 for allocating power for a plurality of uplink carriers, the method comprising:
determining an available power for scheduled transmissions associated with the plurality of uplink carriers by subtracting, from a maximum wireless transmit/receive unit (WTRU) transmit power:
a sum of power associated with a dedicated physical control channel (DPCCH) for the plurality of uplink carriers,
a power associated with a high speed dedicated physical control channel (HS-DPCCH), and
a power allocated for non-scheduled transmissions for a primary uplink carrier of the plurality of uplink carriers; and
allocating the available power for scheduled transmissions among the plurality of uplink carriers.
2. The method of claim 1 , wherein the available power for scheduled transmissions associated with the plurality of uplink carriers is further determined based on a power associated with an enhanced dedicated channel (E-DCH) DPCCH (E-DPCCH).
3. The method of claim 1 , wherein the available power for scheduled transmissions is allocated among the plurality of uplink carriers based on a serving grant and a corresponding DPCCH power for each of the plurality of uplink carriers.
4. The method of claim 1 , wherein the plurality of uplink carriers includes an E-DCH.
5. The method of claim 1 , wherein the power allocated for non-scheduled transmissions comprises a sum of power allocated for non-scheduled MAC-d flows.
6. The method of claim 5 , wherein the power allocated for each non-scheduled MAC-d flow of the non-scheduled MAC-d flows is a power used to transmit available data up to a non-scheduled grant payload for the non-scheduled MAC-d flow.
7. The method of claim 5 , wherein the non-scheduled MAC-d flows are allowed to be multiplexed together in a transmission time interval (TTI).
8. The method of claim 7 , further comprising determining the non-scheduled MAC-d flows that are allowed to be multiplexed together in the TTI based on a multiplexing list of non-scheduled MAC-d flows that are assigned a highest level of priority.
9. The method of claim 8 , wherein the multiplexing list of non-scheduled MAC-d flows includes a plurality of non-scheduled MAC-d flows with data available.
10. A wireless transmit/receive unit (WTRU) capable of allocating power for a plurality of uplink carriers, the WTRU comprising:
a processor configured to:
determine an available power for scheduled transmissions associated with the plurality of uplink carriers by subtracting, from a maximum WTRU transmit power:
a sum of power associated with a dedicated physical control channel (DPCCH) for the plurality of uplink carriers,
a power associated with a high speed dedicated physical control channel (HS-DPCCH), and
a power allocated for non-scheduled transmissions for a primary uplink carrier of the plurality of uplink carriers; and
allocate the available power for scheduled transmissions among the plurality of uplink carriers.
11. The WTRU of claim 10 , wherein the processor is further configured to determine the available power for scheduled transmissions associated with the plurality of uplink carriers based on a power associated with an enhanced dedicated channel (E-DCH) DPCCH (E-DPCCH).
12. The WTRU of claim 10 , wherein the processor is configured to allocate the available power for scheduled transmissions among the plurality of uplink carriers based on a serving grant and a corresponding DPCCH power for each of the plurality of uplink carriers.
13. The WTRU of claim 10 , wherein the plurality of uplink carriers includes an E-DCH.
14. The WTRU of claim 10 , wherein the power allocated for non-scheduled transmissions comprises a sum of power allocated for non-scheduled MAC-d flows.
15. The WTRU of claim 14 , wherein the power allocated for each non-scheduled MAC-d flow of the non-scheduled MAC-d flows is a power used to transmit available data up to a non-scheduled grant payload for the non-scheduled MAC-d flow.
16. The WTRU of claim 14 , wherein the non-scheduled MAC-d flows are allowed to be multiplexed together in a transmission time interval (TTI).
17. The WTRU of claim 16 , wherein the processor is further configured to determine the non-scheduled MAC-d flows that are allowed to be multiplexed together in the TTI based on a multiplexing list of non-scheduled MAC-d flows that are assigned a highest level of priority.
18. The WTRU of claim 17 , wherein the multiplexing list of non-scheduled MAC-d flows includes a plurality of non-scheduled MAC-d flows with data available.