Abstract: The invention relates to a method for reducing the latency in a GPRS network, via which information is transmitted between a data requesting unit, i.e. a client (1), and a data-providing unit, i.e. a server (9), in the form of data packets. In order to transmit the data packets from the client (1) to the server (9), at least one first communication channel (UL-TBF) is opened and then closed. At least a second communication channel (DL-TBF) is then opened and closed for transmitting information from the server (9) to the client (1). A not insignificant latency is thus produced between the request for information and the receipt of information, which can be reduced, according to the invention, by opening the second communication channel (DL TBF) before closing the first communication channel (UL-TBF). A radio channel is thus provided for preventive purposes, for the feedback of the requested data.

Abstract: The invention relates to a method for immediately transmitting electronic messages to the telecommunication device of a receiver, preferably mobile, consisting in transmitting the electronic message from an emitter to a receiver by means of an electronic message server. According to said invention, the electronic messages are transmitted to the mobile telecommunication device of the receiver by means of a MMS or WAP system.

Abstract: The invention relates to a method for improving the security of authentication procedures in digital mobile radio telephone systems. In order to make it more difficult if not impossible to work out a secret code KI, several different secret SIM-specific codes KI are contained in the mobile radio telephone network and on a subscriber identity module SIM and a code KI for the implementation of said authentication is selected from the various secret codes thus contained during the authentication process between the subscriber identity module and the mobile radio telephone system pertaining to said SIM.

Abstract: A method of real-time billing of telecommunications links when a subscriber is located outside his or her own network. The method is characterized in that the establishment of the telecommunications links and the control of the real-time billing are carried out through the home network so that the home network remains in control of the cost-generating links.

Abstract: A method for setting up a connection between a mobile radio network and a destination call number in a private communication network via a mobile radio network gateway. According to the inventive method, a call request is transferred from a mobile terminal to the mobile radio network gateway. The mobile radio network gateway begins by setting up a connection to the desired destination call number of the private network and, once this has been successfully achieved, subsequently sets up a connection to the mobile terminal.

Abstract: The invention relates to a method for reducing the latency in a GPRS network, via which information is transmitted between a data requesting unit, i.e. a client (1), and a data-providing unit, i.e. a server (9), in the form of data packets. In order to transmit the data packets from the client (1) to the server (9), at least one first communication channel (UL-TBF) is opened and then closed. At least a second communication channel (DL-TBF) is then opened and closed for transmitting information from the server (9) to the client (1). A not insignificant latency is thus produced between the request for information and the receipt of information, which can be reduced, according to the invention, by opening the second communication channel (DL TBF) before closing the first communication channel (UL-TBF). A radio channel is thus provided for preventive purposes, for the feedback of the requested data.