Method for flexibly charging of IP multimedia communication sessions, telecommunication system and network elements for applying such a method

For the Internet protocol communication multimedia session in a telecommunications system and method for acquiring method planning, which is produced by at least circuit device and communication session charger and charging for same, and identifier OF to serve of the charging communication with the same communication session a state. The method conceals the following steps: A by a session control protocol, comprising a to the control elements' multimedia communication session a related identifier (MSCID) and for determining charge is related information charging information field from the control element transmitted to the control element; A and/or an to the transmission or the application of network layer and session control element is control element of network broadcast in the charging is information, a related identifier corresponding to the charging information at least one group designated, and related service identifier is a multimedia session; In each charge record in each co-operating the communication session's the control element of charging for producing the communication session comprises a charging data of the related identifier and designation, and is connected with a charging the luminescence reception of the related identifier in designation charging data, and calculates the charging of the communication session.