Collision avoidance for scheduling requests and uplink control information

A method for wireless communication at a user equipment (UE), comprising:

• receiving an indication of a plurality of control channel resources of an uplink control channel to be used for an uplink control message;
• identifying a coding rate threshold for the uplink control message;
• determining a payload size of the uplink control message;
• selecting, from the plurality of control channel resources, a control channel resource based at least in part on the coding rate threshold and the determined payload size of the uplink control message;
• and
• transmitting the uplink control message to a base station using the selected control channel resource.

An apparatus for wireless communication, comprising:

• means for identifying that a scheduling request (SR) is to be transmitted on a first uplink control channel message having a first transmission time interval (TTI) duration;
• means for identifying that acknowledgment/negative acknowledgment (ACK/NACK) information is scheduled for transmission on a second uplink control channel message having a second TTI duration that is greater than the first TTI duration, wherein the first uplink control channel message and the second uplink control channel message overlap in time;
• means for determining that the ACK/NACK information is to be transmitted with the SR on the first uplink control channel message based at least in part on the first uplink control channel message overlapping with the second uplink control channel message;
• means for determining resources of the first uplink control channel message to be used for transmission of the SR and the ACK/NACK information;
• and
• means for transmitting the SR and the ACK/NACK information on the determined resources of the first uplink control channel message.

An apparatus for wireless communication, comprising:

• means for receiving an indication of a plurality of control channel resources of an uplink control channel to be used for an uplink control message;
• means for identifying a coding rate threshold for the uplink control message;
• means for determining a payload size of the uplink control message;
• means for selecting, from the plurality of control channel resources, a control channel resource based at least in part on the coding rate threshold and the determined payload size of the uplink control message;
• and
• means for transmitting the uplink control message to a base station using the selected control channel resource.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify that a scheduling request (SR) is to be transmitted on a first uplink control channel message having a first transmission time interval (TTI) duration;
• identify that acknowledgment/negative acknowledgment (ACK/NACK) information is scheduled for transmission on a second uplink control channel message having a second TTI duration that is greater than the first TTI duration, wherein the first uplink control channel message and the second uplink control channel message overlap in time;
• determine that the ACK/NACK information is to be transmitted with the SR on the first uplink control channel message based at least in part on the first uplink control channel message overlapping with the second uplink control channel message;
• determine resources of the first uplink control channel message to be used for transmission of the SR and the ACK/NACK information;
• and
• transmit the SR and the ACK/NACK information on the determined resources of the first uplink control channel message.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive an indication of a plurality of control channel resources of an uplink control channel to be used for an uplink control message;
• identify a coding rate threshold for the uplink control message;
• determine a payload size of the uplink control message;
• select, from the plurality of control channel resources, a control channel resource based at least in part on the coding rate threshold and the determined payload size of the uplink control message;
• and
• transmit the uplink control message to a base station using the selected control channel resource.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a format of an uplink control channel, the uplink control channel having a first transmission time interval (TTI) duration that is less than a second TTI duration;
• determine a coding rate threshold for an uplink control message;
• configure a plurality of resources of the uplink control channel for the transmission of the uplink control message based at least in part on the format and the coding rate threshold;
• and
• transmit, to a user equipment (UE), an indication of the plurality of resources of the uplink control channel to use for the uplink control message.