A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, system information including first configuration information on a number of paging frames in a discontinuous reception, DRX, cycle, second configuration information on a paging frame offset, Offset, third configuration information on a number of paging occasions, POs, per paging frame, and fourth configuration information on a first physical downlink control channel, PDCCH, monitoring occasion number of each PO; identifying a paging frame based on the first configuration information and the second configuration information; identifying an index of a PO based on the first configuration information and the third configuration information, the PO including a set of S PDCCH monitoring occasions for paging; and monitoring the S PDCCH monitoring occasions for paging in the PO, the S being a number of actual synchronization signal blocks, SSBs, transmitted from the base station, wherein the monitoring of the S PDCCH monitoring occasions for paging starts from a first PDCCH monitoring occasion of the PO identified by the fourth configuration information, wherein the paging frame is identified by equation 1, SFN + Offset mod T = T div N * UE _ ID mod N, where the SFN is a system frame number for the paging frame, the Offset is indicated by the second information, the T is the DRX cycle, the N is indicated by the first information, the UE_ID is an identity of the terminal, and wherein the index of the PO is identified by equation 2, i _ s = floor UE _ ID / N mod Ns, where the i_s is the index, the Ns is indicated by the third information. receiving, from a base station, system information including first configuration information on a number of paging frames in a discontinuous reception, DRX, cycle, second configuration information on a paging frame offset, Offset, third configuration information on a number of paging occasions, POs, per paging frame, and fourth configuration information on a first physical downlink control channel, PDCCH, monitoring occasion number of each PO; identifying a paging frame based on the first configuration information and the second configuration information; identifying an index of a PO based on the first configuration information and the third configuration information, the PO including a set of S PDCCH monitoring occasions for paging; and monitoring the S PDCCH monitoring occasions for paging in the PO, the S being a number of actual synchronization signal blocks, SSBs, transmitted from the base station, wherein the monitoring of the S PDCCH monitoring occasions for paging starts from a first PDCCH monitoring occasion of the PO identified by the fourth configuration information, wherein the paging frame is identified by equation 1, SFN + Offset mod T = T div N * UE _ ID mod N, where the SFN is a system frame number for the paging frame, the Offset is indicated by the second information, the T is the DRX cycle, the N is indicated by the first information, the UE_ID is an identity of the terminal, and wherein the index of the PO is identified by equation 2, i _ s = floor UE _ ID / N mod Ns, where the i_s is the index, the Ns is indicated by the third information.