Techniques for initial sidelink beam forming

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

• one or more processors configured to execute instructions stored on one or more memories and to cause the second UE to:
• receive, from a first UE using a first receive beam of the second UE, a first physical sidelink shared channel (PSSCH) transmission of a first PSSCH burst, wherein:
• the first PSSCH transmission is associated with a respective transmit beam of one or more transmit beams of the first UE;
• and
• the first PSSCH transmission of the one or more PSSCH transmissions includes respective initial sidelink beamforming information, comprising at least one of:
• a set of preferred time-frequency resources for transmitting at least one response message;
• or
• a set of non-preferred time-frequency resources to avoid using to transmit at least one response message;
• and
• take one or more actions based on the first PSSCH transmission.

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

• determining one or more parameters for an initial sidelink beamforming procedure involving one or more transmit beams;
• and
• performing, using the one or more parameters, the initial sidelink beamforming procedure, comprising:
• transmitting at least a first physical sidelink shared channel (PSSCH) burst, comprising transmitting each PSSCH transmission of one or more PSSCH transmissions using a different respective transmit beam of the one or more transmit beams, wherein each PSSCH transmission of the one or more PSSCH transmissions includes respective initial sidelink beamforming information;
• monitoring, based on the initial sidelink beamforming information, for at least one response message from a second UE responding to at least one of the one or more PSSCH transmissions;
• and
• taking one or more actions based on the monitoring.

A method for wireless communication by a second user equipment (UE), comprising:

• receiving, from a first UE using a first receive beam of the second UE, a first physical sidelink shared channel (PSSCH) transmission of a first PSSCH burst, wherein:
• the first PSSCH transmission is associated with a respective transmit beam of one or more transmit beams of the first UE;
• and
• the first PSSCH transmission of the one or more PSSCH transmissions includes respective initial sidelink beamforming information, comprising at least one of:
• a set of preferred time-frequency resources for transmitting at least one response message;
• or
• a set of non-preferred time-frequency resources to avoid using to transmit at least one response message;
• and
• taking one or more actions based on the first PSSCH transmission.