Nokia Corporation

Panu Suontausta

Jani Ekman

The invention relates to a method () for establishing control information about a mobile station, in where first characteristics of the mobile station communicating with the cellular subsystem of a hybrid cellular telecommunication system are established () in said cellular subsystem using methods that are defined for the cellular subsystem, the cellular subsystem is connected to a non-cellular subsystem, and second characteristics of terminals connected to the non-cellular subsystem are established in said non-cellular subsystem using methods that are defined for the non-ellular subsystem. The method according to the invention is characterized in that said first characteristics of the mobile station are transmitted between a certain translation entity and the cellular subsystem using methods that are defined for the cellular subsystem, transmitted first characteristics are translated () to certain second characteristics of the mobile station and said second characteristics of the mobile station are transmitted () between the translation entity and the non-cellular subsystem using methods that are defined for the non-cellular subsystem. The invention also relates to network elements () and to a translation arrangement ().

Method and arrangement for transmitting information between subsystems in hybrid cellular telecommunication systems

A communications network comprises a central controller which operates to control a zone of the network and which provides a conference call facility with at least one gateway engaged in a call with a mobile station via a first communication channel, means for generating a hand-off required indication indicating that handover of the call is needed, means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.

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Tampere, Finland

Panu Suontausta