Patent ID: 7912041
Filing Date: 2011-03-22
Classification: H04L,H04W

Abstract:
1. A method for controlling a voice call continuity (VCC) function of a terminal in a mobile communications system performing VCC related functions, the method comprising: receiving, by a first network server, VCC capability information of the terminal from the terminal, the VCC capability information indicating whether the terminal is a VCC capable terminal; obtaining, by the first network server, subscriber information associated with the terminal; determining, by the first network server, whether or not a user of the terminal is a VCC subscriber based on the obtained subscriber information; transmitting, by the first network server, the VCC capability information to a second network server, if the determining step indicates that the user of the terminal is a VCC subscriber; performing, by the second network server, a VCC function control for the terminal based on the VCC capability information if the determining step indicates that the user of the terminal is a VCC subscriber, wherein the step of performing the VCC function control includes updating a VCC active user list based on the VCC capability information; transmitting, by the terminal, VCC enabling information to the second network server, the VCC enabling information indicating whether the VCC function of the terminal has been enabled or disabled before or after the terminal is registered with the second network server; and selectively removing a user of the terminal from the VCC active user list based on the VCC enabling information.