Techniques for reducing latency in a wireless communication system

A method for wireless communication, comprising:

• transmitting a scheduling request on a scheduled channel, the scheduling request being transmitted prior to determining whether an acknowledgment (ACK) message has been received;
• determining whether an acknowledgment (ACK) message has been received;
• determining whether a transmission grant has been received based at least in part on transmitting the scheduling request;
• selecting whether to repeat transmission of the scheduling request on the scheduled channel based at least in part on an expiration of a wait time, the selecting based at least in part on whether the ACK message and the transmission grant have been received before the expiration of the wait time;
• and
• repeating, based at least in part on the selecting, transmission of the scheduling request on the scheduled channel following expiration of the wait time.

An apparatus for wireless communication, comprising:

• means for transmitting a first data message on a contention-based channel;
• means for scheduling request for the first data message on a scheduled channel, the scheduling request being transmitted prior to determining whether an acknowledgment (ACK) message has been received for the first data message;
• means for determining whether the ACK message has been received for the first data message;
• means for determining whether a transmission grant has been received based at least in part on transmitting the scheduling request for the first data message;
• means for selecting whether to repeat transmission of the scheduling request using different parameters on the scheduled channel or to repeat transmission of the first data message on the contention-based channel based at least in part on an expiration of a wait time, wherein the wait time commences based at least in part on one of transmitting the first data message or transmitting the scheduling request, the selecting based at least in part on whether the ACK message and the transmission grant have been received before the expiration of the wait time;
• and
• means for based at least in part on the selecting, transmission of the scheduling request using different parameters on the scheduled channel following the expiration of the wait time.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory, the instructions being executable by the processor to:
• transmit a first data message on a contention-based channel;
• transmit a scheduling request for the first data message on a scheduled channel, the scheduling request being transmitted prior to determining whether an acknowledgment (ACK) message has been received for the first data message;
• determine whether the ACK message has been received for the first data message;
• determine whether a transmission grant has been received based at least in part on transmitting the scheduling request for the first data message;
• select whether to repeat transmission of the scheduling request using different parameters on the scheduled channel or to repeat transmission of the first data message on the contention-based channel based at least in part on an expiration of a wait time, wherein the wait time commences based at least in part on one of transmitting the first data message or transmitting the scheduling request, the selecting based at least in part on whether the ACK message and the transmission grant have been received before the expiration of the wait time;
• and
• repeat, based at least in part on the selecting, transmission of the scheduling request using different parameters on the scheduled channel following the expiration of the wait time.

A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable by a processor to:

• transmit a first data message on a contention-based channel;
• transmit a scheduling request for the first data message on a scheduled channel, the scheduling request being transmitted prior to determining whether an acknowledgment (ACK) message has been received for the first data message;
• determine whether the ACK message has been received for the first data message;
• determine whether a transmission grant has been received based at least in part on transmitting the scheduling request for the first data message;
• select whether to repeat transmission of the scheduling request using different parameters on the scheduled channel or to repeat transmission of the first data message on the contention-based channel based at least in part on an expiration of a wait time, wherein the wait time commences based at least in part on transmitting the first data message, the selecting based at least in part on whether the ACK message and the transmission grant have been received before the expiration of the wait time;
• and
• repeat, based at least in part on the selecting, transmission of the scheduling request using different parameters on the scheduled channel following the expiration of the wait time.