Siemens Aktiengesellschaft

Olaf Kautz

Josef Laumen

Norbert Schwagmann

Thomas Gottschalk

Eric Hilf

To change between a packet-oriented PTT session and a circuit-oriented telephone connection as selectable communication connections between at least one first connected radio communication appliance and at least one second connected radio communication appliance in a radio communication system, a first of these two communication connections is selected and set up by at least one connected radio communication appliance and/or by at least one control unit in the radio network in the radio communication system. A change is made from this first communication connection, which has been set up, to the second communication connection under the control of a radio communication appliance which is connected to the first communication connection and/or under the control of that control unit in the radio network in the radio communication system which is connected to the first communication connection by activating the second communication connection while the first communication connection still exists.

Method for changing between a packet-oriented PTT session and a circuit-oriented telephone connection between at least two radio communication appliances, associated radio communication appliance, network component and radio communication system

Provided are a method for changing between a packet-oriented PTT session and a circuit-oriented telephone connection between at least two radio communication appliances, an associated radio communication appliance, a network component and a radio communication system. To change between a packet-oriented PTT session and a circuit-oriented telephone connection as selectable communication connections between at least one first connected radio communication appliance and at least one second connected radio communication appliance in a radio communication system, a first of these two communication connections is selected and set up by at least one connected radio communication appliance and/or by at least one control unit in the radio network in the radio communication system. A change is made from this first communication connection, which has been set up, to the second communication connection under the control of a radio communication appliance which is connected to the first communication connection and/or under the control of that control unit in the radio network in the radio communication system which is connected to the first communication connection by activating the second communication connection while the first communication connection still exists.

A method for managing communication sessions in a packet-oriented communication system, consisting of a central control unit and a plurality of mobile stations, which can be interconnected via the central control unit. To achieve this, a communication session is established between mobile stations that are assigned to a first communication group. Session priorities are then defined for a first mobile station of the first communication group, said station being in addition assigned to at least a second communications group. Finally the session priorities are transmitted to the central control unit. A second communication session is also established between those mobile stations that are assigned to the second communication group(s), including the first mobile station. Both the first and the second communication session are established via the central control unit, in such a way that the latter can manage the first mobile station in both communication sessions according to the transmitted session priorities.

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Berlin, Germany

Olaf Kautz