method for processing exceptional case of establishing default bearer in mobile communication system and device therefor

The exception handling of default bearer setting method and apparatus therefor to solve the practical problem does not provide an IP service to the user equipment is connected to the packet network, while failing to the default bearer establishment in a mobile communication system is provided. An exception processing method of a default bearer setting a mobility management device is receiving a network join request from a user device, transmitting a network admission, including activation requests from the default bearer in response to the network subscription request and a preset the complete response to the activation request of the time into the default bearer and a step of, if not received from the user equipment cancel the network attach procedure. Third-generation mobile communication, a default bearer, the timer