Method and apparatus for receiving system information and paging in mobile communication system

A method of a base station in a communication system, the method comprising:

• transmitting, to a terminal, information for an extended discontinuous reception (DRX) cycle for the terminal;
• transmitting, to the terminal, system information;
• and
• transmitting, to the terminal, a plurality of paging messages,
• wherein, whether a length of an extended DRX cycle configured for the terminal is longer than a modification period is identified, by the terminal, based on the information for the extended DRX cycle, a validation of system information stored in the terminal is verified based on the system information transmitted to the terminal, based on that the length of the extended DRX cycle is longer than the modification period, a plurality of paging messages are monitored during a time period configured for the terminal, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period.

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive information for an extended discontinuous reception (DRX) cycle for the terminal,
• identify whether a length of an extended DRX cycle configured for the terminal is longer than a modification period, based on the information for the extended DRX,
• control the transceiver to receive, from a base station, system information,
• verify whether system information stored in the terminal is valid based on the received system information from the base station, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period, and
• monitor a plurality of paging messages, during a time period configured for the terminal, in case that the length of the extended DRX cycle configured for the terminal is longer than the modification period.

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

• a transceiver;
• and
• a controller coupled to the transceiver and configured to:
• control the transceiver to transmit to a terminal, information for an extended discontinuous reception (DRX) cycle for the terminal,
• control the transceiver to transmit system information, and
• transmit, to the terminal, a plurality of paging messages,
• wherein, whether a length of an extended DRX cycle configured for the terminal is longer than a modification period is identified, by the terminal, based on the information for the extended DRX cycle, a validation of system information stored in the terminal is verified based on the system information transmitted to the terminal, based on that the length of the extended DRX cycle is longer than the modification period, a plurality of paging messages are monitored during a time period configured for the terminal, in case that the length of the extended DRX cycle configured for the terminal is longer than the modification period.