1. A method by a terminal in a wireless communication system, the method comprising:transmitting, to a source radio access node, a first message including state information of a terminal;
receiving, from the source radio access node, a radio resource control (RRC) message including information for performing a handover from the source radio access node to a target radio access node;
establishing a connection to the target radio access node based on the information included in the RRC message; and
transmitting a second message including the state information of the terminal to the target radio access node, when the first message was transmitted during a predetermined time period prior to the receiving of the RRC message.