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1. (WO2010078425) CONTROL CHANNEL FEEDBACK FOR MULTIPLE DOWNLINK CARRIER OPERATIONS
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CLAIMS What is claimed is:

1. A wireless transmit/receive unit (WTRU) comprising: a receiver configured to receive signals over a plurality of downlink carriers; circuitry configured to determine feedback for each of the plurality of downlink carriers based on the received signals; and a plurality of antennas configured to transmit feedback for at least one of the plurality of downlink carriers over a first physical channel and feedback for another of the plurality of downlink carriers over a second physical channel.

2. The WTRU of claim 1 wherein the first physical channel is sent over a first carrier and the second physical channel is sent over a second carrier.

3. The WTRU of claim 2 wherein the first physical channel and the second physical channel use a same channelization code and in-phase/quadrature (I/Q) branch.

4. The WTRU of claim 1 wherein the first physical channel has a different channelization code than the second physical channel.

5. The WTRU of claim 1 further comprising circuitry configured to autonomously transmit the first physical channel and the second physical channel over a single carrier on a condition that a secondary uplink carrier is deactivated.

6. The WTRU of claim 1 further comprising a state reduction device configured to map actual hybrid automatic repeat request-acknowledgement (HARQ-ACK) states to reported HARQ-ACK states of a smaller set.

7. A wireless transmit/receive unit (WTRU) comprising: a receiver configured to receive signals over a plurality of downlink carriers; circuitry configured to generate feedback based on the received signals for transmission over a first High Speed Dedicated Physical Control Channel (HS-DPCCHl) and a second High Speed Dedicated Physical Control Channel (HS-DPCCH2); and an antenna configured to transmit the HS-DPCCHl and HS-DPCCH2, wherein the HS-DPCCHl and HS-DPCCH2 are time multiplexed and transmitted over a single carrier.

8. The WTRU of claim 7 further comprising a transmitter configured to transmit at least two channel quality indicators (CQIs) over two consecutive sub-frames.

9. The WTRU of claim 7 wherein the HS-DPCCHl and HS-DPCCH2 are transmitted with a spreading factor of 128.

10. The WTRU of claim 7 wherein a first slot and second slot of a sub-frame are utilized to provide hybrid automatic repeat request-acknowledgement (HARQ) feedback for up to four downlink carriers.

11. The WTRU of claim 7, further comprising circuitry configured to autonomously transmit the first physical channel and the second physical channel over different carriers on a condition that a secondary uplink carrier is activated.

12. The WTRU of claim 7 further comprising a state reduction device configured to map actual HARQ-ACK states to reported HARQ-ACK states of a smaller set.

13. A method implemented in a wireless transmit/receive unit (WTRU) comprising: receiving signals over a plurality of downlink carriers; generating feedback for each of the plurality of downlink carriers based on the received signals; and transmitting, via a plurality of antennas, feedback for at least one of the plurality of downlink carriers over a first physical channel and feedback for another of the plurality of downlink carriers over a second physical channel.

14. The method of claim 13, wherein the first physical channel is sent over a first carrier and the second physical channel is sent over a second carrier.

15. The method of claim 14, wherein the first physical channel and the second physical channel use a same channelization code and in-phase/quadrature (I/Q) branch.

16. The method of claim 13, wherein the first physical channel has a different channelization code than the second physical channel.

17. The method of claim 13, further comprising autonomously transmitting the first physical channel and the second physical channel over a single carrier on a condition that a secondary uplink carrier is deactivated.

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