13. A base station in a wireless communication system, the base station comprising:a transceiver; and
a controller coupled with the transceiver and configured to:
identify whether to change first system information among a plurality of system information,
in case that the first system information is identified to be changed, control the transceiver to transmit, to a terminal in which an extended discontinuous reception (eDRX) is configured, a first paging message including a system information change indicator indicating the first system information is to be changed, the first paging message being transmitted in an extended modification period,
control the transceiver to transmit, to the terminal, changed first system information in a next extended modification period, and
control the transceiver to transmit, to the terminal, a second paging message for a radio resource control (RRC) connection establishment based on the changed first system information,
wherein a first value tag stored in the terminal is not changed in case that the first system information is changed, and
wherein the first value tag is used to identify whether to update second system information in case that the RRC connection establishment is triggered.