Nokia Telecommunications Oy

Nokia Corporation

Matti Lehtimaki

Jyri Suvanen

Marko V&auml;nsk&auml;

A telecommunication network and a routing method, wherein user data are routed via an access network () to a gateway device () of a core network () connected to the access network () via a first interface. The control of the gateway device () is performed by supplying a control information from the core network () to the gateway device () via a second interface, and the user data are routed directly between the access network () and the gateway device () via the first interface. Thus, the user data are routed directly from the access network () to the gateway (), whereas the control can be performed via a dedicated and open control interface. Processing resources can be shared between several applications and trunking gains can be utilized. Furthermore, real-time transport capabilities can be provided by a simple method of connecting the Internet to the mobile network.

Telecommunication network and routing method

A speech signal is transmitted over a radio path by a mobile station, and is received in a first base station. The speech signal, encoded using encoding parameters, is forwarded in the information frames from the first base station to a remotely located speech decoder. Each of the information frames carries a synchronization word and a synchronization check bit recurring at predetermined intervals within the information frame. The information frames are received at the remote speech decoder. The remote speech decoder is synchronized with one of the received information frames using the synchronizing word. Speech encoding parameters are extracted from the received information frames, and the recurring synchronization check bit is monitored within the received information in order to detect an error in the recurring synchronization check bit in the received information frames.

Apparatus for preventing use of erroneous speech encoding parameters for decoding digital speech transmissions

Transmission equipment for an interexchange connection

Transcoder with prevention of tandem coding of speech

Digital mobile communication system

Growing community of inventors

Espoo, Finland

Matti Lehtimaki