Link identity determination and signaling

A transmitting device for wireless communication, the transmitting device comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• determine a source identity (ID) and a destination ID for a sidelink data transmission based on a type of communication of the sidelink data transmission being unicast communication, multicast communication, or broadcast communication, wherein the source ID is different for different types of communication of the unicast communication, the multicast communication, or the broadcast communication;
• transmit at least one sidelink control message indicating the source ID and the destination ID for the sidelink data transmission, the source ID and the destination ID being based on the type of the communication of the sidelink data transmission;
• and
• transmit the sidelink data transmission associated with the at least one sidelink control message.

A method of wireless communication at a receiving device, the method comprising:

• receiving at least one sidelink control message indicating a source identity (ID) and a destination ID for a sidelink data message, the source ID and the destination ID being based on a type of communication of the sidelink data message being unicast communication, multicast communication, or broadcast communication, wherein the source ID is different for different types of communication of the unicast communication, the multicast communication, or the broadcast communication;
• receiving the sidelink data message associated with the at least one sidelink control message;
• and
• attempting to decode or skipping decoding of the sidelink data message based on at least one of the source ID or the destination ID received in the at least one sidelink control message.

A receiving device for wireless communication, the receiving device comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive at least one sidelink control message indicating a source identity (ID) and a destination ID for a sidelink data message, the source ID and the destination ID being based on a type of communication of the sidelink data message being unicast communication, multicast communication, or broadcast communication, wherein the source ID is different for different types of communication of the unicast communication, the multicast communication, or the broadcast communication;
• receive the sidelink data message associated with the at least one sidelink control message;
• and
• attempt to decode or skip decoding of the sidelink data message based on at least one of the source ID or the destination ID received in the at least one sidelink control message.