| 摘要 |
In one embodiment, a scheme is disclosed for controlling voice call continuity (VCC) functionality of a user equipment (UE) device (202) with respect to a call in a network environment (200) including a visited network (206) and a home IP multimedia subsystem (IMS) network (204). 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 (202), a message (606) is generated by the UE device (202) towards the network environment (200) including a VCC application server node (114-N) disposed in the IMS network (204), the message (606) being generated pursuant to a call originated by the UE device (202) while roaming in the visited network (206), wherein the message (606) includes a VCC operational mode indicator indicative of the UE device's VCC operational mode.
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