Foreword1 Scope2 References3 Definitions, symbols and abbreviations4 Architecture considerations5 Charging principles5.1 IMS charging principles5.1.0 Introduction5.1.1 IMS charging applicability5.1.2 IMS charging correlation5.1.3 SDP handling5.1.4 Trigger conditions5.1.5 IMS support of real-time tariff transfer5.1.6 Served user identification5.1.7 Single charging session from AS/ATCF acting as B2BUA5.1.8 Charging support for roaming architecture for voice over IMS with local breakout5.1.8A Charging support for roaming architecture for voice over IMS with home routed traffic5.1.9 Charging support for Network provided Location information5.1.9A Charging support for IMS transit scenarios5.1.10 Charging support for TRF5.1.11 Charging support for IMS service continuity5.1.12 IMS support of announcements5.1.13 Charging support of UE location(s) and TimeZone(s)5.1.14 Charging support of duration based charging5.2 IMS offline charging principles5.2.1 Basic principles5.2.2 Message flows and types5.2.2.0 Introduction5.2.3 CDR generation5.2.4 GTP' record transfer flows5.2.5 Bi CDR file transfer5.3 IMS online charging scenarios5.4 IMS converged charging scenarios6 Definition of charging information6.1 Data description for IMS offline charging6.2 Data description for IMS online charging6.3 IMS charging specific parameters6.4 Data description for IMS converged chargingB.0 GeneralB.1 Scenario 1 - session related (SCUR): service termination on reception of an initial SIP INVITE requestB.2 Scenario 2 - session related (SCUR): service termination triggered after an early SIP dialog is establishedB.3 Scenario 3 - session related (SCUR): service termination triggered after a confirmed SIP dialog is establishedB.5 Scenario 5 - session unrelated (IEC): service termination on reception of an initial non-INVITE SIP request 5.2.2 Message flows and types 32.2603GPPCharging managementIP Multimedia Subsystem (IMS) chargingRelease 17Telecommunication managementTS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM