On-demand negative acknowledgment resource request

A method for wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE), a configuration message indicating that the UE is to request resources for transmitting negative acknowledgment feedback to the base station for a downlink transmission;
• transmitting the downlink transmission to the UE;
• receiving, from the UE based at least in part on transmitting the configuration message and on transmitting the downlink transmission, a request for resources to be used by the UE to transmit the negative acknowledgment feedback for the downlink transmission;
• and
• transmitting, to the UE based at least in part on receiving the request, an indication of resources allocated for transmitting the negative acknowledgment feedback.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• receive, from a base station, a configuration message indicating that the UE is to request resources for transmitting negative acknowledgment feedback to the base station for a downlink transmission;
• attempt to decode the downlink transmission from the base station;
• determine to transmit the negative acknowledgment feedback to the base station for the downlink transmission based at least in part on receiving the configuration message and attempting to decode the downlink transmission;
• and
• transmit, to the base station, a request for resources for transmitting the negative acknowledgment feedback based at least in part on determining to transmit the negative acknowledgment feedback.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• a memory coupled with the processor, wherein the memory comprises instructions executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), a configuration message indicating that the UE is to request resources for transmitting negative acknowledgment feedback to the base station for a downlink transmission;
• transmit the downlink transmission to the UE;
• receive, from the UE based at least in part on transmitting the configuration message and on transmitting the downlink transmission, a request for resources to be used by the UE to transmit the negative acknowledgment feedback for the downlink transmission;
• and
• transmit, to the UE based at least in part on receiving the request, an indication of resources allocated for transmitting the negative acknowledgment feedback.