Intra-slot transmit/receive beam selection for sidelink

A method of wireless communication performed by a first user equipment (UE), comprising:

• transmitting, to a second UE over a sidelink, an indication of a preferred transmit beam direction of a plurality of transmit beam directions;
• receiving, from the second UE over the sidelink based on a plurality of receive beam directions, a plurality of beam measurement signals in the preferred transmit beam direction;
• determining, based on the plurality of beam measurement signals received from the second UE, a preferred receive beam direction from the plurality of receive beam directions;
• and
• receiving, from the second UE over the sidelink based on the preferred receive beam direction, data.

A first user equipment (UE) comprising:

• a memory;
• a transceiver;
• and
• at least one processor coupled to the memory and the transceiver, wherein the first UE is configured to:
• transmit, to a second UE over a sidelink, a plurality of beam measurement signals in a plurality of beam directions during a first slot, wherein each beam measurement signal of the plurality of beam measurement signals includes at least one of sidelink control information (SCI) or a channel state information-reference signal (CSI-RS), and wherein the plurality of beam directions includes at least two different beam directions;
• receive, from the second UE, an indication of a preferred beam direction of the plurality of beam directions;
• and
• transmit, to the second UE over the sidelink, data in the preferred beam direction.

A first user equipment (UE) comprising:

• a memory;
• a transceiver;
• and
• at least one processor coupled to the memory and the transceiver, wherein the first UE is configured to:
• transmit, to a second UE over a sidelink, an indication of a preferred transmit beam direction of a plurality of transmit beam directions;
• receive, from the second UE over the sidelink based on a plurality of receive beam directions, a plurality of beam measurement signals in the preferred transmit beam direction;
• determine, based on the plurality of beam measurement signals received from the second UE, a preferred receive beam direction from the plurality of receive beam directions;
• and
• receive, from the second UE over the sidelink based on the preferred receive beam direction, data.