Method and apparatus for signaling multiple resources for message 3 (msg3) transmissions

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• transmit, to a base station via the transceiver, a random access preamble,
• receive, from the base station via the transceiver, a random access response (RAR) comprising a plurality of media access control (MAC) sub-protocol data units (subPDUs), wherein the plurality of MAC subPDUs include a random access preamble identifier (RAPID) corresponding to the random access preamble, and
• identify whether each MAC subPDU in the received RAR includes the RAPID corresponding to the random access preamble.

A method of a base station for performing a random access procedure, comprising:

• receiving, from a terminal, a random access preamble;
• generating a random access response (RAR) comprising a plurality of media access control (MAC) sub-protocol data units (subPDUs), wherein the plurality of MAC subPDUs include a random access preamble identifier (RAPID) corresponding to the random access preamble;
• and
• transmitting, to the terminal, the generated RAR.

A base station in a wireless communication system, comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• receive, from a terminal via the transceiver, a random access preamble,
• generate a random access response (RAR) comprising a plurality of media access control (MAC) sub-protocol data units (subPDUs), wherein the plurality of MAC subPDUs include a random access preamble identifier (RAPID) corresponding to the random access preamble;
• and
• transmit, to the terminal via the transceiver, the generated RAR.