Abstract: The invention relates to a method carried out by a service control entity to set up a communication path for exchange of service control messages with a service application entity (200) in a mobile communications network for controlling an application of a service, by the service application entity (200), to a media data flow, the media data flow being established between the service control entity (100, 300) and a remote end. A first message is transmitted on a service control channel, the first message comprising as a destination address an address of the remote end, wherein offer data is added to the transmitted first message, the offer data including an indicator indicating that the service control entity is configured to support a communication path on a media data plane of the media data flow based on Real Time Transport Control Protocol, RTCP, service control messages.

Abstract: The invention relates to a method, by an initiating entity (100, 200, 210), to initiate the set up of one or more communication channels for exchange of information between the initiating entity and one or more responding entities (100, 200, 210). The method comprises the following steps: A first message is transmitted on an end-to-end control channel between a first entity (100) and a second entity. The first message comprises as a destination address a second entity address, wherein offer data is added to the transmitted first message. The offer data indicates that the initiating entity (100, 200, 210) is configured to support one or more communication channels and the offer data comprise an address at which the initiating entity is configured to receive the information. Then, a second message is received on the end-to-end control channel, the second message comprising as destination address an address of the first entity.

Abstract: A message (203) of a first communication service is received from a service provider. On the basis of the received message (203) of the first communication service, an information element for personalizing communication services is stored. The received message (203) of the first communication service is then forwarded towards a subscriber (10). Further, a message (205) of a second communication service is received from the subscriber. The stored information element is inserted into the received message (205) of the second communication service. The received message (205) of the second communication service with the inserted information element is then forwarded towards the service provider. The service provider may then personalize the second communication service based on the information element.