Method and apparatus for uplink transmission in wireless communication system

A method by a base station for performing a random access in a wireless communication system, the method comprising:

• generating a message including first information for configuring an uplink (UL), second information for configuring a supplementary uplink (SUL), and third information for performing the random access;
• transmitting the generated message to a terminal;
• and
• receiving a random access preamble for performing the random access on an SUL carrier or an UL carrier,
• wherein the third information includes a threshold value for selecting between the UL carrier and the SUL carrier.

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

• a transceiver;
• and
• a controller configured to:
• control the transceiver to receive a message including first information for configuring an uplink (UL), second information for configuring a supplementary uplink (SUL), and third information for performing a random access from a base station,
• measure a reference signal received power (RSRP) based on a signal received from the base station,
• compare the RSRP with a threshold value included in the third information for performing the random access,
• determine an SUL carrier to perform the random access in case that the RSRP is smaller than the threshold value,
• determine an UL carrier to perform the random access in case that the RSRP is equal to or larger than the threshold value, and
• control the transceiver to transmit a random access preamble on the determined carrier based on the first information or the second information.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• generate a message including first information for configuring an uplink (UL), second information for configuring a supplementary uplink (SUL), and third information for performing a random access,
• control the transceiver to transmit the generated message to a terminal, and
• control the transceiver to receive a random access preamble for performing the random access on an SUL carrier or an UL carrier,
• wherein the third information includes a threshold value for selecting between the UL carrier and the SUL carrier.