5.1.7 Single charging session from AS/ATCF acting as B2BUA

32.2603GPPCharging managementIP Multimedia Subsystem (IMS) chargingRelease 17Telecommunication managementTS

When a session-initiating SIP INVITE message is received by an AS/ATCF, this AS/ATCF, per application logic needs, acting as a B2BUA, may decide ICID for the outgoing dialog to be the same as received or different.

In case the same ICID is preserved between incoming and outgoing dialog by the AS/ATCF acting as a B2BUA, a single charging session for both dialogs can be created by this AS/ATCF. This option, refered-to as "OneChargingSession" in the different descriptions, is applicable per Operator configuration.