IP Multimedia Subsystem Impact on Billing

1. IP Multimedia SubsystemImpact on Billing Dipl.Ing. Tomislav LOVRIC mobilkom austria November 2005

2. Default Statement from all IMSVendors „ IMS Billing is a very complex Issue! “

3. What is IMS ? Engineers perspective

4. Messaging Rich messaging Gaming Video sharing Push to talk Content sharing Presence Chat VoIP IP Multimedia channel between terminals 3G, ADSL, etc. What is IMS ? Marketing perspective

5. Agenda • Short Company overview • Motivation for IMS • mobilkom austria and IMS • IMS billing issues & standards • IMS billing at mobilkom austria

6. Competition • Market leader mobilkom austria • Crowding out due to market saturation • Intensive competition among five mobile service operators • Combination of low call rates and high terminal subsidization Source: mobilkom austria, Market Research Status: 30. June 2005

7. New technologies • Best network quality (confirmed through testing by Vienna University of Technology) • First full-coverage GPRS-network worldwide (2000) • First network operator with WAP-Push technology worldwide (2001) • First national UMTS-network in Europe (2002) • First national network operator with PUSH-to-Talk technology (2004) • First national EDGE-network (2005)

8. UMTS – The 3rd Generation • Data transfer rates: up to 384 kBit/s • Population Coverage: 62% • UMTS+EDGE: Full Coverage Multimedia-Network • HSDPA: New 3G-Turbo (based on UMTS) allows data transfer rates up to 3.6MBit/s (End 2005) Status: 30. June 2005

9. Innovations • ÖBB MOBILE TICKET - World’s first actual m-commerce application (1999) • A1 MOBILGUIDE - Europe’s first “Location Based Service” (2000) • A1 GPRS DATAGUARD - Secure mobile access to company data (2001) • A1 TELECOMMANDER - Control devices remotely using mobile and Internet (2002) • Mobile payment of parking fees (2003) • A1 SIGNATURE – Digital signature with the mobile phone (2004)

10. Locations & Members mobilkom austria group (mag) has locations in 5 countries • mobilkom austria • Mobiltel (Bulgaria) • VIPnet (Croatia) • Si.mobil (Slovenia) • mobilkom liechtenstein

11. 2004 1.HY 05 Employees Customers 3,625 4.95 m 3,599 5.0 m incl. Mobiltel incl. Mobiltel - - 5,955 8.2 m Operating Figures

12. Key Financial Indices 2004 Revenues 2,125.5 m EUR Adjusted EBITDA 765.4 m EUR Operating income 407.4 m EUR excl. Mobiltel

13. Agenda • Short Company overview • Motivation for IMS • mobilkom austria and IMS • IMS billing issues & standards • IMS billing at mobilkom austria

14. IMS is an evolution of GSM/UMTS The IP Multimedia Subsystem (IMS) was first introduced with 3GPP Release 5 and will be advanced by Release 6 (frozen) and 7 (work in progress). Source: 3GPP, 2004

15. IMS is the vision of a NG mobile Internet • During the first ten years ... the Internet has been dominated by non real-time, person-to-machine ... information services. • The next major development will be realtime person-to-person communications, including voice and video. • The IMS vision is to integratemobile voice communicationsand Internet technologies, bringing the power and wealth of Internet services to mobile users. Source: UMTS Forum/Strategic Considerations for IMS, Feb 2003

16. Horizontal Service Architecture Applications Common Functions Service 2 Service 1 Service 3 Network Functions Service 1 Service 2 Service 3 • Topics: • Generic architecture • Specific applications New Service Architecture Vertical Service Architecture • Topics • Application complexity

17. Entertainment • Person-to-Person Gaming • Interactive Shows and Events • Multimedia Advertisement • Audio and Video Streaming Enterprise and on the road • Dynamic Info Services • Interactive guidance • Remote Facility Control IMS Services Communication • Push-to-talk/Push-to-show • VOIP • Click-to-dial • Instant/Multimedia Messaging • Presence • Multi-Party Chat • See what I see (rich voice) • Person-to-Person Multimedia • Video conferencing • Collaboration (Applicationsharing, Whiteboard) Combined basic services, simultaneously, dynamically controlled IMS allows all voice & data services to be integrated into a single proposition, allowing a variety of user experiences

18. Agenda • Short Company overview • Motivation for IMS • mobilkom austria and IMS • IMS billing issues & standards • IMS billing at mobilkom austria

19. It‘s a long way ... • Research projects • SIP, OSA, Web Services • Next Generation Service Network concept • Technology strategy & layered architecture blueprint • IMS & other strategic platforms, e.g. NGIN • Next Generation Service Network implementation plan • Business framework • System implementation Next Generation Service Network concept IMS preparation: research projects Next Generation Service Network implementation

20. ... in a complex environment ... • Existing pre-IMS IP-based services • Push-to-Talk, Video Conversion, WAP, Messaging (MMS, eMail) • Pre-IMS infrastructure • Built-in user & session management • IPv4 • Proprietary protocols • IMS-like Internet services • VoIP: Skype, SIPgate • Peer-2-Peer file sharing: Kazaa, Napster • Instant Messaging: MSN, AoL WAP Internet IMS Streaming Messaging Telephony

21. ... with many issues • User management: Identities, Authentication • Security • Integration: IP versions, QoS, interworking • Provisioning&Charging • Service architecture for terminals & network • Operations Depending on the service portfolio and system architecture, we&you should consider

22. Agenda • Short Company overview • Motivation for IMS • mobilkom austria and IMS • IMS billing issues & standards • IMS billing at mobilkom austria

23. Charging Models I • There are typically four main elements to a tariff: • - Subscription • - Events • - Transferred Volume • - Session Duration • any or allof which may be used in combination ! • QoS ??

24. Charging Models II Synchronous communication (Voice, Videotelephony, Chat, Streaming) -> charged by duration or optional by setup charge or minimum increments per session Asynchronous communication (any kind of messaging) -> charged by event (volume classes) Active applications by known and authenticated user -> charged by event per download or by subscription Active applications by unknown user -> charged by duration or optional by setup charge or minimum increment per session Browsing & Content on-net (Content MMS, Content Streaming & Download) -> charged by event or in case of discovery/teaser by flat rate Browsing & Content off-net (the user content activity stays out of the control of the network) -> charged by duration or optional setup charge or minimum increments per session Peer-to-peer Services -> charged by duration or volume, thus application billing not applicable

25. G-CDR’s Bearer Volume IMS Session Info IMS Application &Media Info • PDP Session Volume • CBB Info • IMS Categorized • IMS Session Info • Application Id • P2P Services Info.. • Application_Id‘ • Duration • Volume.. IMS : Billing sources AS/ MRFC Servers GGSN HSS PDF/CRF BGCF I-CSCF S-CSCF MGCF P-CSCF MGW

26. Standards: Release 5

27. Standards: Release 6

28. IMS architecture – Overview

29. BGCF BGCF MGCF I-CSCF S-CSCF Online Online Charging Charging AS System System Billing Billing (OCS) (OCS) System System SGSN SGSN GGSN GGSN Charging Interfaces to IMS network Charging Charging Collection Collection Bi Rf Function Function [ CCF ] (CCF) P-CSCF ISC Rating SCF Function Ro Rb ECF Rc MRFC Re CAP BCF CF Ro Bp Charging Gateway Ga Function [ CGF ]

30. AS 1 AS 2 S-CSCF GGSN Problem: Billing for IMS Services Several charging layers in parallel: Several charging sources: Content IMS Session Bearer

31. How to charge for IMS Services ? Correlation ? In real-time ?? Potential solution: Only one IMS charging source ! The bearer should be free-of-charge (apart form peer-to-peer services) No billing Info from the S-CSCF in case of application billing (Vendors !)

32. Impacts on Billing & Provisioning • New User-Identities : User-ID as a charging key => mka is ready ! • Rating against A- and B-Numbers for Data-Services • Peer-to-peer services : how to find out what users are doing ? • Roaming : H-GGSN vs. V-GGSN solution • QoS • AoC /Advice of charge

33. Charging: Who pays? • User identities for charging • Different identities for bearer vs. session vs. application: MSISDN, IMSI, User ID, IMPI/IMPU, Credit Card, ... • Bearer or application may be provided by 3rd party • Keep it understandable & simple • Charging information handling • Single point of charging information vs. correlation? • Real-time charging for all users (pre- & postpaid)? Application: Credit Card Session: User ID Bearer: MSISDN • Operator: Define consistent and simple charging strategy • Standardisation: Define charging attributes for IMS enablers (e.g. PTT) • Industry: Implement correlation information (e.g. GCID/ICID)

34. Agenda • Short Company overview • Motivation for IMS • mobilkom austria and IMS • IMS billing issues & standards • IMS billing at mobilkom austria

35. IN_tm_v 5.0 CGF IMS CCF Diameter Ro Ro ADATA mobilkom: IMS Billing architecture Online Billing TID ORGA IMS OCF Pre-Paid Billing VF DCCA Diameter GGSN App. Server S - CSCF [ IPC ] (e.g. PoC) Rf G-CDR Diameter Rf Offline Billing AMDOCS Post-Paid Billing

36. Vendor Details TID/OCF – Transactional Integration Device Vendor: Openet, Active Charge Integrator: SIEMENS CGF/CCF – Billing Mediation Vendor: Metasolv MNM 5.0 Integrator: Kapsch Carrier Com GGSN – Nortel IPC Integrator: Kapsch Carrier Com AMDOCS – Postpaid Billing ORGA OPSC – Prepaid Billing ADATA – Postpaid CDR format, ASCII, modularly created with flexible length Design:internal development, design by T.Lovric IN-tm – Prepaid format

37. Conclusio • Essential criteria for successful IMS Billing launch: • DIAMETER [Ro/Rf] as the mayor charging protocol • ICID/GCID implementation ASAP • Home GGSN/P-CSCF Solution to start with • Single charging source for IMS Services

38. Thank you – Any questions ? Dipl.Ing Tomislav LOVRIC mobilkom austria AG & Co KG Obere Donaustraße 29 1020 Wien www.mobilkomaustria.com E-mail: t.lovric@mobilkom.at