Beam association for sidelink feedback

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

• receiving a first sidelink message using a first beam of the second UE, the first sidelink message corresponding to a feedback time interval for feedback for the first sidelink message;
• receiving a second sidelink message using a second beam of the second UE that is different from the first beam, the second sidelink message corresponding to the feedback time interval for feedback for the first sidelink message and for the second sidelink message;
• selecting, from one of the first beam or the second beam, a transmission beam for transmitting feedback during the feedback time interval;
• and
• transmitting feedback to a first UE using the selected transmission beam, wherein the feedback is associated with the first sidelink message, the second sidelink message, or both.

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

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit a first sidelink message using a first beam of the first UE, the first sidelink message corresponding to a feedback time interval for feedback for the first sidelink message;
• transmit a second sidelink message using a second beam of the first UE that is different from the first beam, the second sidelink message corresponding to the feedback time interval for feedback for the first sidelink message and for the second sidelink message;
• select, from one of the first beam or the second beam, a receive beam for receiving feedback during the feedback time interval;
• and
• monitor for feedback using the selected receive beam, wherein the feedback is associated with the first sidelink message, the second sidelink message, or both.

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

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a first sidelink message using a first beam of the second UE, the first sidelink message corresponding to a feedback time interval for feedback for the first sidelink message;
• receive a second sidelink message using a second beam of the second UE that is different from the first beam, the second sidelink message corresponding to the feedback time interval for feedback for the first sidelink message and for the second sidelink message;
• select, from one of the first beam or the second beam, a transmission beam for transmitting feedback during the feedback time interval;
• and
• transmit feedback to a first UE using the selected transmission beam, wherein the feedback is associated with the first sidelink message, the second sidelink message, or both.