Simultaneous transmission of acknowledgement, channel quality indicator and scheduling request
Systems and methodologies are described that facilitate simultaneous transmission of control information in a single sub-frame. For instance, simultaneous transmission can maintain single carrier waveforms for a control channel even when a plurality of information types is scheduled in concurrently. Channel quality indicators, scheduling requests and acknowledgement messages can be jointly coded. In addition, reference symbols in a sub-frame can be modulated to indicate values associated with a scheduling request or an acknowledgement message. Moreover, in situations where channel quality indicators, scheduling requests and or acknowledgement messages are simultaneously scheduled, one or more can be dropped. Further, a single carrier constraint can be relaxed to enable simultaneous transmission of information in the sub-frame at different frequencies.
1. A method of reporting uplink control information in a multiple-access wireless communication system, the method comprising:
identifying a collision for reporting two or more types of control information in a sub-frame;
selecting, based on the two or more types of control information associated with the identified collision, between dropping one of the types of control information or transmitting the two or more types of control information; and
transmitting at least one control information transmission comprising at least one of the two or more types of control information in the sub-frame.
2. The method of claim 1 , wherein:
identifying the collision comprises detecting a scheduling request and an acknowledgement message scheduled in the sub-frame; and
transmitting the at least one control information transmission comprises transmitting the scheduling request and the acknowledgement message at resources assigned for the scheduling request in the sub-frame.
3. The method of claim 1 , wherein identifying the collision comprises detecting a channel quality indicator and an acknowledgment message scheduled in the sub-frame, the method further comprising:
dropping the channel quality indicator for the at least one control information transmission in the sub-frame.
4. The method of claim 3 , further comprising:
re-scheduling the channel quality indicator to a subsequent sub-frame.
5. The method of claim 1 , wherein identifying the collision comprises detecting a channel quality indicator and an acknowledgment message scheduled in the sub-frame, the method further comprising:
jointly coding the channel quality indicator and the acknowledgment message in the at least one control information transmission.
6. The method of claim 1 , wherein identifying the collision comprises detecting a channel quality indicator and an acknowledgment message scheduled in the sub-frame, the method further comprising:
coding the channel quality indicator in a control channel for transmission in the at least one control information transmission in the sub-frame; and
modulating a reference signal with the acknowledgement message for the at least one control information transmission.
7. The method of claim 1 , wherein identifying the collision comprises detecting an acknowledgement message, a scheduling request and a channel quality indicator scheduled in the sub-frame, the method further comprising:
jointly coding at least two of the acknowledgement message, the scheduling request and the channel quality indicator in the at least one control information transmission.
8. The method of claim 1 , wherein identifying the collision comprises detecting an acknowledgement message, a scheduling request and a channel quality indicator scheduled in the sub-frame, the method further comprising:
modulating a reference signal with at least one of the scheduling request or the acknowledgement message for the at least one control information transmission.
9. The method of claim 1 , wherein transmitting the at least one control information transmission comprises transmitting at least two of the two or more types of control information on respectively varying frequencies in the sub-frame.
10. An apparatus for reporting uplink control information in a multiple-access wireless communication system, the apparatus comprising at least one processor configured to:
identify a collision for reporting two or more types of control information in a sub-frame;
select, based on the two or more types of control information associated with the identified collision, between dropping one of the types of control information or transmitting the two or more types of control information; and
transmit at least one control information transmission comprising at least one of the two or more types of control information in the sub-frame.
11. The apparatus of claim 10 , wherein the at least one processor is further configured to:
detect a scheduling request and an acknowledgement message scheduled in the sub-frame; and
transmit the scheduling request and the acknowledgement message at resources assigned for the scheduling request in the sub-frame.
12. The apparatus of claim 10 , wherein the at least one processor is further configured to:
detect a channel quality indicator and an acknowledgment message scheduled in the sub-frame; and
drop the channel quality indicator for the at least one control information transmission in the sub-frame.
13. The apparatus of claim 10 , wherein the at least one processor is further configured to:
detect a channel quality indicator and an acknowledgment message scheduled in the sub-frame; and
jointly code the channel quality indicator and the acknowledgment message in the at least one control information transmission.
14. The apparatus of claim 10 , wherein the at least one processor is further configured to:
detect a channel quality indicator and an acknowledgment message scheduled in the sub-frame;
code the channel quality indicator in a control channel for transmission in the at least one control information transmission in the sub-frame; and
modulate a reference signal with the acknowledgement message for the at least one control information transmission.
15. The apparatus of claim 10 , wherein the at least one processor is further configured to:
detect an acknowledgement message, a scheduling request and a channel quality indicator scheduled in the sub-frame; and
jointly code at least two of the acknowledgement message, the scheduling request and the channel quality indicator in the at least one control information transmission.
16. An apparatus for reporting uplink control information in a multiple-access wireless communication system, comprising:
means for identifying a collision for reporting two or more types of control information in a sub-frame;
means for selecting, based on the two or more types of control information associated with the identified collision, between dropping one of the types of control information or transmitting the two or more types of control information; and
means for transmitting at least one control information transmission comprising at least one of the two or more types of control information in the sub-frame.
17. The apparatus of claim 16 , wherein the means for identifying the collision detects a scheduling request and an acknowledgement message scheduled in the sub-frame, and the means for transmitting the at least one control information transmission transmits the scheduling request and the acknowledgement message at resources assigned for the scheduling request in the sub-frame.
18. The apparatus of claim 16 , wherein the means for identifying the collision detects a channel quality indicator and an acknowledgment message scheduled in the sub-frame, further comprising:
means for dropping the channel quality indicator for the at least one control information transmission in the sub-frame.
19. The apparatus of claim 16 , wherein the means for identifying the collision detects a channel quality indicator and an acknowledgment message scheduled in the sub-frame, further comprising:
means for jointly coding the channel quality indicator and the acknowledgment message in the at least one control information transmission.
20. The apparatus of claim 16 , wherein the means for identifying the collision detects a channel quality indicator and an acknowledgment message scheduled in the sub-frame, further comprising:
means for coding the channel quality indicator in a control channel for transmission in the at least one control information transmission in the sub-frame; and
means for modulating a reference signal with the acknowledgement message for the at least one control information transmission.
21. The apparatus of claim 16 , wherein the means for identifying the collision detects an acknowledgement message, a scheduling request and a channel quality indicator scheduled in the sub-frame, further comprising:
means for jointly coding at least two of the acknowledgement message, the scheduling request and the channel quality indicator in the at least one control information transmission.
22. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a computer, cause the computer to:
identify a collision for reporting two or more types of control information in a sub-frame;
select, based on the two or more types of control information associated with the identified collision, between dropping one of the types of control information or transmitting the two or more types of control information; and
transmit at least one control information transmission comprising at least one of the two or more types of control information in the sub-frame.