Apparatus and method for operating user plane protocol stack in connectionless communication system

A sender user equipment (UE) for device to device (D2D) communication, the sender UE comprising:

• a transceiver;
• and
• a processor coupled to the transceiver, wherein the processor is configured to:
• identify a first part of a destination identifier (ID) for identifying target of data for the D2D communication, and a second part of the destination ID, wherein the second part of the destination ID is different from the first part of the destination ID,
• transmit control information including the first part of the destination ID to a receiver UE, wherein the first part of the destination ID is used for filtering packets at a physical layer of the receiver UE, and
• transmit a medium access control (MAC) protocol data unit (PDU) including a MAC header including the second part of the destination ID to the receiver UE, wherein the second part of the destination ID is used for filtering packets at a MAC layer of the receiver UE.