Method for automatic charging

1 . A communication system, comprising:

a fixed communication network;

a mobile radio communication network;

a mobile radio network-fixed network interface computer which is connected to the fixed communication network and to the mobile radio communication network for mapping a data stream between the fixed communication network and the mobile radio communication network;

a superpeer host computer which is connected to the mobile radio network-fixed network interface computer; and

a peer-to-peer message filter which is disposed in the mobile radio communication network and which is set up such that peer-to-peer messages supplied to the peer-to-peer message filter from the mobile radio communication network are identified and can be delivered to the superpeer host computers,

wherein at least one digital rights management service is installed in the superpeer host computer, by means of which digital rights management service usage rights with regard to an electronic file which is transmitted from or to the mobile radio network-fixed network interface computer are specified.

2 . The communication system according to claim 1 , wherein the at least one digital rights management service is set up such that at least one of the following is performed on the electronic file:

inserting a digital rights management coding scheme by means of which it is specified that the electronic file will become unusable after a predefined time has elapsed or at a predefined time;

modifying the contents of the electronic file;

removing part of the electronic file;

scanning for a computer virus, a worm or a Trojan horse; and

signing the contents of the electronic file.

3 . The communication system according to claim 1 , further comprising a digital rights provider computer which is connected to the superpeer host computer and is set up such that it transmits to the superpeer host computer the rights to be taken into account for the electronic file in each case.

4 . The communication system according to claim 1 ,

wherein the fixed communication network is based on internet protocols.

5 . The communication system according to claim 1 ,

wherein the superpeer host computer is disposed in the mobile radio communication network.

6 . The communication system according to claim 1 ,

wherein the mobile radio communication network is based on a mobile radio system of the third or a succeeding generation.

7 . The communication system according to claim 6 , wherein the mobile radio communication network is based on one of the following mobile radio communication networks:

Universal Mobile Telecommunications System, and

Future Public Land Mobile Telephone System.

8 . The communication system according to claim 1 ,

wherein the mobile radio communication network is based on a mobile radio communication network according to Groupe Speciale Mobile.

9 . The communication system according to claim 6 , wherein the mobile radio communication network is based on the Universal Mobile Telecommunications System, and

the mobile radio network-fixed network interface computer is a Gateway GPRS Support Node computer.

10 . The communication system according to claim 1 , further comprising an installation mechanism which is set up such that a peer-to-peer service is installed in the superpeer computer if the service is requested sufficiently frequently.

11 . The communication system according to claim 1 ,

wherein the superpeer host computer has installed at least one search service by means of which information relating to the electronic file is determined by the computers provided in the fixed communication network and made available for further processing.

12 . The communication system according to claim 1 , where a peer-to-peer superpeer host computer has installed at least one digital rights management service by means of which usage rights with regard to an electronic file which is transmitted from or to the mobile radio network-fixed network interface computer are specified.

13 . A method for processing a peer-to-peer message, comprising:

identifying a mobile radio peer-to-peer message by a peer-to-peer message filter computer disposed in a mobile radio communication network;

transmitting the mobile radio peer-to-peer message to a superpeer computer connected to a mobile radio network-fixed network interface computer

processing the mobile radio peer-to-peer message by the superpeer host computer; and

processing an electronic file identified by the superpeer host computer according to the mobile radio peer-to-peer message according to a digital rights management service installed in the superpeer host computer.