Method and apparatus for performing paging in mobile communication system

A method of a new radio (NR) base station in a wireless communication system, the method comprising:

• receiving, from a long term evolution (LTE) base station, a first message for adding the NR base station for dual connectivity of a terminal;
• generating configuration information associated with a first signaling radio bearer (SRB);
• transmitting, to the LTE base station, a second message in response to the first message, the second message including the configuration information associated with the first SRB;
• and
• establishing the first SRB between the NR base station and the terminal.

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

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a long term evolution (LTE) base station, a first message via a first signaling radio bearer (SRB) between the terminal and the LTE base station, the first message including configuration information associated with a second SRB,
• establish the second SRB based on the configuration information associated with the second SRB, the second SRB being between the terminal and a new radio (NR) base station, and
• transmit, to the LTE base station, a second message in response to the first message via the first SRB.

A new radio (NR) base station in a wireless communication system, the NR base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from a long term evolution (LTE) base station, a first message for adding the NR base station for dual connectivity of a terminal,
• generate configuration information associated with a first signaling radio bearer (SRB),
• transmit, to the LTE base station, a second message in response to the first message, the second message including the configuration information associated with the first SRB, and
• establish the first SRB between the NR base station and the terminal.