A method performed by a terminal (2g-05) in a communication system, the method comprising: transmitting, to a base station (2g-10), a request message for system information related to cell reselection for a new radio, NR, neighboring cell; receiving (2g-25), from the base station, the system information related to the cell reselection for the NR neighboring cell, the system information including second minimum required reception level information for each NR frequency, wherein the system information includes first minimum required reception level information for a supplementary uplink, SUL, in case that the NR neighboring cell supports the SUL; in case that (2g-30) the terminal supports the SUL and the system information includes the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection using a first cell selection reception level value acquired based on the first minimum required reception level information for the SUL; in case that the terminal does not support the SUL, the system information corresponds to a system information block 2, SIB 2, and the SIB 2 does not include the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection for an intra-frequency cell reselection using a second cell selection reception level value acquired based on the second minimum required reception level information included in the SIB 2; and in case that the terminal does not support the SUL, the system information corresponds to a system information block 4, SIB 4, and the SIB 4 does not include the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection for an inter-frequency cell reselection using a third cell selection reception level value acquired based on the second minimum required reception level information included in the SIB 4. transmitting, to a base station (2g-10), a request message for system information related to cell reselection for a new radio, NR, neighboring cell; receiving (2g-25), from the base station, the system information related to the cell reselection for the NR neighboring cell, the system information including second minimum required reception level information for each NR frequency, wherein the system information includes first minimum required reception level information for a supplementary uplink, SUL, in case that the NR neighboring cell supports the SUL; in case that (2g-30) the terminal supports the SUL and the system information includes the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection using a first cell selection reception level value acquired based on the first minimum required reception level information for the SUL; in case that the terminal does not support the SUL, the system information corresponds to a system information block 2, SIB 2, and the SIB 2 does not include the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection for an intra-frequency cell reselection using a second cell selection reception level value acquired based on the second minimum required reception level information included in the SIB 2; and in case that the terminal does not support the SUL, the system information corresponds to a system information block 4, SIB 4, and the SIB 4 does not include the first minimum required reception level information for the SUL of the NR neighboring cell, performing (2g-30) the cell reselection for an inter-frequency cell reselection using a third cell selection reception level value acquired based on the second minimum required reception level information included in the SIB 4. <EOS>