Management of dynamic groups in a communication system

A communication system comprising:

• a communication service client unit;
• further communication service client units,
• wherein the communication service client unit is configured to produce one or more messages which contain at least one criterion which is respectively met or not met by the further communication service client units and contain a request for provision of a communication service and a specification that the further communication service client units which meet the criterion can be participants in the communication service provided;
• a communication service server unit;
• and
• a server unit which is configured to produce a list of the further communication service client units which meet the criterion and to transmit the list to the communication service server unit,
• wherein the communication service server unit is configured to provide the communication service using the communication service client unit and the further communication service client units which meet the criterion as participants.

A communication system comprising:

• a communication service client unit;
• further communication service client units,
• wherein the communication service client unit is configured to produce one or more messages which contain at least one criterion which is respectively met or not met by the further communication service client units and contain a request for provision of a communication service and a specification that the further communication service client units which meet the criterion can be participants in the communication service provided;
• a communication service server unit;
• and
• a server unit which is configured to transmit an information item representing the at least one criterion to the communication service server unit,
• wherein the communication service server unit is configured to provide the communication service using the communication service client unit and the further communication service client units which meet the criterion as participants.

A method for operating a communication system having a communication service client unit, further communication service client units, a communication service server unit, and a server unit, the method comprising:

• the communication service client unit producing one or more messages which contain at least one criterion which is respectively met or not met by the further communication service client units and contain a request for provision of a communication service and a specification that the further communication service client units which meet the criterion can be participants in the communication service provided;
• the server unit producing a list of the further communication service client units which meet the criterion and transmitting the list to the communication service server unit;
• and
• the communication service server unit providing the communication service using the communication service client unit and the further communication service client units which meet the criterion as participants.

A method for operating a communication system having a communication service client unit, further communication service client units, a communication service server unit, and a server unit, the method comprising:

• the communication service client unit producing one or more messages which contain at least one criterion which is respectively met or not met by the further communication service client units and contain a request for provision of a communication service and a specification that the further communication service client units which meet the criterion can be participants in the communication service provided;
• the server unit transmitting an information item representing the at least one criterion to the communication service server unit;
• and
• the communication service server unit providing the communication service using the communication service client unit and the further communication service client units which meet the criterion as participants.