Method and apparatus for transmitting data and control information on multiple uplink carrier frequencies
Wireless transmission may include using multiple uplink carriers. A wireless transmit/receive unit (WTRU) may transmit via a primary uplink carrier data, pilot and control channels for uplink transmissions on both uplink carriers, and transmit a data channel and a pilot channel via a secondary uplink carrier. Alternatively, the WTRU may transmit via a primary uplink carrier data, pilot, and control channels for uplink transmission on the primary uplink carrier, and transmit via a secondary uplink carrier data, pilot, and control channels for uplink transmissions on the secondary uplink carrier. Each uplink carrier may be associated with at least one specific downlink carrier such that the WTRU applies control information received on a downlink carrier to uplink transmissions on an uplink carrier associated with the downlink carrier on which the WTRU receives the control information.
1. A method implemented by a wireless transmit receive unit (WTRU) capable of communicating using long term evolution (LTE)-Advanced wireless communications, the method comprising:
the WTRU receiving a message from a network assigning a primary downlink carrier;
the WTRU determining a primary uplink carrier associated with the primary downlink carrier;
the WTRU determining one or more secondary downlink carriers and one or more secondary uplink carriers; and
the WTRU sending first feedback information associated with the primary downlink carrier and second feedback information associated with at least one of the one or more secondary downlink carriers on an uplink control channel of the primary uplink carrier.
2. The method of claim 1 , wherein the WTRU does not utilize a control channel for sending feedback information on the one or more secondary uplink carriers.
3. The method of claim 1 , wherein the first and second feedback information correspond to acknowledgement (ACK)/negative ACK (NACK) HARQ information.
4. The method of claim 1 , wherein each of the one or more secondary downlink carriers includes a downlink control channel that is used by the WTRU for receiving scheduling information for one of the one or more secondary uplink carriers.
5. The method of claim 1 , wherein each of the first and second feedback information comprises at least one of channel quality information or precoding information.
6. The method of claim 1 , further comprising the WTRU receiving a grant message via a downlink carrier control channel of one of the primary downlink carrier or one of the one or more secondary downlink carriers, wherein the grant message includes a field that indicates which uplink carrier is to be used for transmitting in accordance with the grant message.
7. The method of claim 1 , wherein a number of the one or more secondary downlink carriers exceeds a number of the one or more secondary uplink carriers.
8. The method of claim 1 , wherein semi-persistent scheduling is allowed on the primary downlink carrier and the primary uplink carrier but not allowed on the one or more secondary downlink carriers and the one or more secondary uplink carriers.
9. The method of claim 1 , further comprising the WTRU sending first uplink data via a first uplink data channel on the primary uplink carrier and second uplink data via a second uplink data channel of one of the one or more secondary uplink carrier carriers.
10. A wireless transmit/receive unit (WTRU) comprising:
a transmitter;
a receiver; and
a processor configured to:
receive, via the receiver, a message from a network that assigns a primary downlink carrier;
determine a primary uplink carrier associated with the primary downlink carrier;
determine one or more secondary downlink carriers and one or more secondary uplink carriers; and
send, via the transmitter, first feedback information associated with the primary downlink carrier and second feedback information associated with at least one of the one or more secondary downlink carriers on an uplink control channel of the primary uplink carrier.
11. The WTRU of claim 10 , wherein the WTRU does not utilize a control channel to send feedback information on the one or more secondary uplink carriers.
12. The WTRU of claim 10 , wherein the first and second feedback information correspond to acknowledgement (ACK)/negative ACK (NACK) HARQ information.
13. The WTRU of claim 10 , wherein each of the one or more secondary downlink carriers includes a downlink control channel that is used by the WTRU to receive scheduling information for one of the one or more secondary uplink carriers.
14. The WTRU of claim 10 , wherein each of the first and second feedback information comprises at least one of channel quality information or precoding information.
15. The WTRU of claim 10 , wherein the processor is further configured to receive, via the receiver, a grant message via a downlink carrier control channel of one of the primary downlink carrier or one of the one or more secondary downlink carriers, wherein the grant message includes a field that indicates which uplink carrier is to be used to transmit in accordance with the grant message.
16. The WTRU of claim 10 , wherein a number of the one or more secondary downlink carriers exceeds a number of the one or more secondary uplink carriers.
17. The WTRU of claim 10 , wherein semi-persistent scheduling is allowed on the primary downlink carrier and the primary uplink carrier but not allowed on the one or more secondary downlink carriers and the one or more secondary uplink carriers.
18. The WTRU of claim 10 , wherein the processor is further configured to send, via the transmitter, first uplink data via a first uplink data channel on the primary uplink carrier and second uplink data via a second uplink data channel of one of the one or more secondary uplink carrier carriers.