Siemens Aktiengesellschaft

Nokia Siemens Networks Gmbh & Co Kg

Norbert Seitter

Thomas Belling

Franz Kalleitner

Andreas Trapp

Andrej Görbing

Frank Bachmann

Bart Baekelandt

Herbert Heiβ

Thierry Nedelec

Ralf Kochanowski

Hans-Jürgen Hanisch

Marcelo Nelson Wadeck

A method establishes a video telephone connection in a data network that includes a telephone network and an IP network based on the internet protocol. The expression video telephony connection is to be taken generally in this context and encompasses multimedia telephony in addition to pure video telephony.

Method for establishing a video telephone connection and/or a multimedia telephone connection in a data network

A video telecommunication connection is established via a landline telecommunications network and an IP multimedia subsystem telecommunications network using a media gateway control function of at least one Internet multimedia-media gateway device in the IP multimedia subsystem telecommunications network. An H.223 multiplex level usable for a telecommunication connection is exposed to an H.223 protocol negotiation, in carrying out an H.245 protocol negotiations for setting up the H.223 protocol negotiations connection for a telecommunication connection. A media gateway control function device is informed when the H.223 logic channels are open by H.245 signaling, thereby enabling the Internet multimedia-media gateway device of the IP multimedia subsystem telecommunications network to carry out at least part of the setup.

Signaling referring to setup of H.324 video telephone between media gateway and controller

The embodiments relate to, among other things, a network interface unit (IM-MGW) in which signaling data is separated from useful data by the values of received data. The signaling data is tunneled to a control unit (MGCF). Two different data transmission networks (CS, IMS) can thus be simply combined, in particular, for video telephony.

Method for the transmission of signalling data in a network interface unit and in a control unit and corresponding devices

An IP user data transport connection is established between a Media Gateway O and a Media Gateway T according to the BICC 'Delayed Backward Bearer Establishment'. The Media Gateway O sends an IPBCP Accepted message towards the Media Gateway T upon receipt of an IPBCP Request message from Media Gateway T. The Media Gateway O sends data within the user data transport connection towards the Media Gateway T. The user data may arrive at the Media Gateway T before the IPBCP accepted message. The Media Gateway T retrieves the source IP address and Port number from a user data transport connection IP packet received the Media Gateway O, and sends the first user data transport connection IP packet(s) towards the Media Gateway O upon receipt of a user data transport connection IP packet from the Media Gateway O, using the retrieved IP Address and Port number as destination.

Method and apparatus for a fast installation of an IP user connection over a 3GPP NB interface under application of the bICC 'delayed backward bearer establishment' and avoidance of failure

The embodiments relates to, among other things, a network interface unit (IM-MGW) in which signaling data is separated from useful data by the values of received data. The signaling data is tunneled to a control unit (MGCF). Two different data transmission networks (CS, IMS) can thus be simply combined, in particular, for video telephony.

Method for forwarding signalling data in an interworking unit and in a control unit and corresponding devices

The present invention relates to a method and apparatus for modification of a connection between a transmitting subscriber and a receiving subscriber in a communications system, which is based on data compression, within a switching center, with a data frame which arrives in the switching center and is formatted on the basis of a framing protocol being replaced independently of the length of the data frame by a new data frame formatted on the basis of the framing protocol, such that additional information can be fed into the connection without any loss of quality or time.

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Kempten, Germany

Norbert Seitter