Indicating source and destination devices

An apparatus comprising a first user equipment, the apparatus further comprising:

• a processor that:
• generates mapping information, wherein the mapping information comprises mapping between a pair of a source identities, an index, and at least one destination identity;
• provides the mapping information to a second user equipment;
• and
• generates a first data packet comprising sidelink data for a third user equipment;
• and
• a transmitter that transmits the first data packet from the first user equipment to the second user equipment, wherein the second user equipment, in response to decoding the first data packet correctly, generates a second data packet at least based on the mapping information, the second data packet comprises sidelink data for the third user equipment, and the second user equipment transmits the second data packet to the third user equipment.

An apparatus comprising a first user equipment, the apparatus further comprising:

• a processor that:
• generates header information for a first data packet, wherein the header information indicates a destination identifier corresponding to a third user equipment;
• and
• generates the first data packet comprising the header information and sidelink data for the third user equipment;
• and
• a transmitter that transmits the first data packet from the first user equipment to a second user equipment, wherein the second user equipment, in response to decoding the first data packet correctly, generates a second data packet at least based on the header information, the second data packet comprises sidelink data for the third user equipment, and the second user equipment transmits the second data packet to the third user equipment.