| 摘要 |
In one embodiment, a scheme is disclosed for controlling voice call continuity (VCC) functionality of a user equipment (UE) device with respect to a call in a network environment including a visited network and an IP multimedia subsystem (IMS) network. The UE device's VCC operational mode is provided to be selectably alterable responsive to user input. Upon detecting the VCC operational mode of the UE device, a message is generated by the UE device towards the network environment including a VCC application server node disposed in the IMS network, the message being generated pursuant to a call originated by the UE device while roaming in the visited network, wherein the message includes a VCC operational mode indicator indicative of the UE device's VCC operational mode.
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