Method for performing paging-related operation of second UE having connection with first UE in wireless communication system, and apparatus therefor

A base station for performing an operation related to paging of a second user equipment (UE) having a connection to a first UE in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• receive a paging message for the second UE from a second mobility management entity (MME);
• and
• based on that the second UE is in both of a core network (CN) idle state and a radio resource control (RRC) connected state, transmit, to the second MME, a message including information related to a connection state of the second UE in response to the paging message, although a response to the paging message is not received from the second UE while the second UE is in the CN idle state and the RRC connected state.