Techniques for enhanced sidelink feedback transmission

A method for wireless communications at a first wireless device, comprising:

• identifying a feedback resource configuration for receiving feedback information over a sidelink feedback channel, the feedback resource configuration comprising one or more start and length indicator values, or one or more bitmaps, or any combination thereof, wherein the sidelink feedback channel comprises two or more symbol periods;
• transmitting a sidelink message to a second wireless device over a sidelink shared channel;
• and
• receiving the feedback information from the second wireless device in response to the sidelink message, wherein the feedback information is received over the sidelink feedback channel using the two or more symbol periods in accordance with the feedback resource configuration.

An apparatus for wireless communications at a first wireless device, comprising:

• at least one processor;
• and
• memory coupled with the at least one processor, the memory storing instructions executable by the at least one processor to cause the apparatus to:
• receive a first control message indicating a feedback resource configuration for transmitting feedback information over a sidelink feedback channel, the feedback resource configuration comprising one or more start and length indicator values, or one or more bitmaps, or any combination thereof, wherein the sidelink feedback channel comprises two or more symbol periods;
• receive a sidelink message from a second wireless device over a sidelink shared channel;
• and
• transmit the feedback information to the second wireless device based at least in part on decoding the sidelink message, wherein the feedback information is transmitted over the sidelink feedback channel using the two or more symbol periods in accordance with the feedback resource configuration.

An apparatus for wireless communications at a first wireless device, comprising:

• at least one processor;
• and
• memory coupled with the at least one processor, the memory storing instructions executable by the at least one processor to cause the apparatus to:
• identify a feedback resource configuration for receiving feedback information over a sidelink feedback channel, the feedback resource configuration comprising one or more start and length indicator values, or one or more bitmaps, or any combination thereof, wherein the sidelink feedback channel comprises two or more symbol periods;
• transmit a sidelink message to a second wireless device over a sidelink shared channel;
• and
• receive the feedback information from the second wireless device in response to the sidelink message, wherein the feedback information is received over the sidelink feedback channel using the two or more symbol periods in accordance with the feedback resource configuration.