| 摘要 |
Method for improved handling of emergency calls during roaming, wherein a user equipment is assigned to a home network, wherein a first node of the visited network communicates with a second node of the home network via an IP transportation tunnel, wherein upon establishment and/or modification of the tunnel emergency service information is transmitted to the second node of the home network, wherein in case that both • a voice call is initiated by the user equipment using a specific emergency call telephone number being a valid emergency call telephone number in the visited telecommunications network, and • the user equipment is initially handling the voice call - involving the specific emergency call telephone number - as a normal voice call, the method comprises the sequential steps of: • the voice call is initiated by the user equipment by means of transmitting a first message to the second node of the home network, the first message comprising the specific emergency call telephone number, • the specific emergency call telephone number is detected - based on the emergency service information transmitted to the second node of the home network -, by the home network, as being a valid emergency call telephone number within the visited network in relation to the voice call, • a second message is generated by the home network, the second message being transmitted to the user equipment, and comprising an indication, to the user equipment, to trigger an emergency call procedure in accordance to the configuration of the visited network by means of a third message. |
