DEVICE AND METHOD FOR PROVIDING SERVICE IN MOBILE COMMUNICATION SYSTEM

摘要

The present invention relates to a method for providing a service by a user equipment in a mobile communication system. In the method, a connection request message is transmitted to a network when an entry to a non-legacy mobile communication system area is detected, a connection acceptance message including information on whether a voice service via an internet protocol is supported or whether a circuit switched fall back (CSFB) scheme is supported is received from the network, and a voice service is received through a non-legacy mobile communication system on the basis of the internet protocol or the CSFB scheme when the information included in the connection acceptance message indicates that the network supports the voice service via the internet protocol or the CSFB scheme.