Patent ID: 7899086
Filing Date: 2011-03-01
Classification: H04W

Abstract:
1. A method for signaling a change from a first service to a second service during a call between a terminal device and a further terminal device over at least one communication network, comprising: when a change from the first service to the second service takes place during a call between the terminal device and the further terminal device, signaling by a network unit of the communication network, via which the terminal device is currently communicating, to at least one further network unit whether the change was initiated by the terminal device or by a network unit of the communication network; and adding at least one parameter to a MuMe dummy codec, said parameter indicating whether the change was initiated by the terminal device or by a network unit of the communication network; the change including a change from a voice telephony service to a video telephony service, text telephony service or image telephony service.