Abstract:
An apparatus and a method for supporting a communication network in a portable terminal are provided. The method includes receiving a registration confirmation message from a first base station, determining whether the first base station satisfies a switching condition to a packet switching mode, switching a mode of the portable terminal from a circuit switching mode to the packet switching mode when the first base station satisfies the switching, and registering the portable terminal in a first communication network through the first base station in the packet switching mode.