Apparatus and method for random access in wireless communication system

An apparatus of a base station in a wireless communication system, the apparatus comprising:

• a transceiver;
• and
• at least one processor operably coupled to the transceiver and configured to:
• receive at least one random access preamble from at least one terminal,
• generate at least one message comprising a plurality of multiplexed random access responses corresponding to the at least one random access preamble and information on the plurality of multiplexed random access responses for identifying the plurality of multiplexed random access responses, and
• transmit the at least one message,
• wherein the at least one processor is further configured to:
• determine a correlation value for each of the at least one random access preambles, and
• generate the at least one message including uplink data allocation information corresponding to each of the at least one random access preamble based on the correlation value.

An apparatus of a terminal in a wireless communication system, the apparatus comprising:

• a transceiver;
• and
• at least one processor operably coupled to the transceiver and configured to:
• transmit a random access preamble selected from a plurality of random access preambles to a base station,
• receive at least one message comprising a plurality of multiplexed random access responses corresponding to the selected random access preamble and information on the plurality of multiplexed random access responses, and
• identify the plurality of multiplexed random access responses based on the information on the plurality of multiplexed random access responses,
• wherein the at least one message including uplink data allocation information corresponding to the random access preamble is generated based on a correlation value that is determined for the random access preamble.