Norbert Schwagmann

Communication device, radio communication arrangement and method for transmitting information

Apparatus and method for determining a device connected to a radio communication terminal

Communication Session Server

Apparatus and method for controlling a telecommunications conference

Apparatus and method for requesting or allocating a push-to-talk right to talk and/or for requesting or communicating queuing information

Method for allocating a communication right, communication conference session server and communication conference session server arrangement

Communication network unit and method for exchanging capability information

Communication device, method for establishing a communication connection and method for using a communication connection

System and method for management of communication rights

Communications system, method for controlling a communications system, network access device and method for controlling a network access device