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IP Multimedia SubsystemImpact on Billing
Dipl.Ing. Tomislav LOVRICmobilkom austriaNovember 2005
page 2DI T.Lovricmobilkom austria
„ IMS Billing is a very
complex Issue! “
Default Statement from all IMS Vendors
page 3DI T.Lovricmobilkom austria
What is IMS ? Engineers perspective
TransportNetwork
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
WLAN/xDSL
IMS CoreNetwork S/I-CSCF
Inter-workingFunctions
IM-MGW
CS/PSTN
PDFAccess
Dependencies
P-CSCF
BGCF
MGCF
HSS/SLF
ServiceLayer
SupportSystems
Provisioning OSSBilling & Customer
CareOCS /
Mediation
Go(COPS)
IP connectivity
UE / SIPTerminal
Ro(Diameter)
Rf(Diameter)
ISC Other IMS/SIPNetworks
SIPSIP SIP
SIP
SIP
Mn(H.248)
SIP
Media Server(MRFP)
3d Party SP
Is this needed ?What is it ?
Mb
Cx/Dx(Diameter)
Sh/Dh(Diameter)
Mp
Mp
WSI, etc.
Ro/Rf(Diameter)
Rf(Diameter)
Rf(Diameter)
Ro/Rf(Diameter)
Generic AS
Service Interaction Manager
PresenceServer
PoC Server
Service LogicGroup
Other Enablers
MRFC
AS (e.g. Conferencing) 3d Party
GW
Service Logic
DNS /ENUM
Ut(Http)
BSF
Service LogicGroup
Auth. Proxy
Zn(Diameter)
AP-ASs(Http)
TransportNetwork
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
WLAN/xDSLWLAN/xDSL
IMS CoreNetwork S/I-CSCF
Inter-workingFunctions
IM-MGW
CS/PSTN
PDFAccess
Dependencies
P-CSCF
PDFAccess
Dependencies
P-CSCF
BGCF
MGCF
HSS/SLF
ServiceLayer
SupportSystems
Provisioning OSSBilling & Customer
CareOCS /
Mediation
Go(COPS)
IP connectivity
UE / SIPTerminal
Ro(Diameter)
Rf(Diameter)
ISC Other IMS/SIPNetworks
SIPSIP SIP
SIP
SIP
Mn(H.248)
SIP
Media Server(MRFP)
3d Party SP
Is this needed ?What is it ?
Mb
Cx/Dx(Diameter)
Sh/Dh(Diameter)
Mp
Mp
WSI, etc.
Ro/Rf(Diameter)
Rf(Diameter)
Rf(Diameter)
Ro/Rf(Diameter)
Generic AS
Service Interaction Manager
PresenceServer
PoC Server
Service LogicGroup
Other Enablers
MRFC
AS (e.g. Conferencing) 3d Party
GW
Service Logic
DNS /ENUMDNS /ENUM
Ut(Http)
BSF
Service LogicGroup
Auth. Proxy
Zn(Diameter)
AP-ASs(Http)
page 4DI T.Lovricmobilkom austria
What is IMS ? Marketing perspective
Rich messaging
IP Multimedia channel between
terminals
Content sharing
Push totalk
Chat
Video sharing
Messaging
Presence
3G, ADSL, etc.
VoIP
Gaming
page 5DI T.Lovricmobilkom austria
Agenda
• Short Company overview
• Motivation for IMS
• mobilkom austria and IMS
• IMS billing issues & standards
• IMS billing at mobilkom austria
page 6DI T.Lovricmobilkom austria
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 ResearchStatus: 30. June 2005
page 7DI T.Lovricmobilkom austria
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)
page 8DI T.Lovricmobilkom austria
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
page 9DI T.Lovricmobilkom austria
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)
page 10DI T.Lovricmobilkom austria
Locations & Members
• mobilkom austria
• Mobiltel (Bulgaria)
• VIPnet (Croatia)
• Si.mobil (Slovenia)
• mobilkom liechtenstein
mobilkom austria group (mag) has locations in 5 countries
page 11DI T.Lovricmobilkom austria
Operating Figures
3,625Employees
-incl. Mobiltel
3,599
5,955
2004 1.HY 05
4.95 mCustomers
-incl. Mobiltel
5.0 m
8.2 m
page 12DI T.Lovricmobilkom austria
407.4 m EUR
765.4 m EUR
2004
2,125.5 m EUR
Key Financial Indices
excl. Mobiltel
Revenues
Adjusted EBITDA
Operating income
page 13DI T.Lovricmobilkom austria
Agenda
• Short Company overview
• Motivation for IMS
• mobilkom austria and IMS
• IMS billing issues & standards
• IMS billing at mobilkom austria
page 14DI T.Lovricmobilkom austria
IMS is an evolution of GSM/UMTSThe 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
page 15DI T.Lovricmobilkom austria
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 integrate mobile voice communications and Internet technologies, bringing the power and wealth of Internet services to mobile users.
Source: UMTS Forum/Strategic Considerations for IMS, Feb 2003
IMSIP core
Mobile MM device
MM Terminal 1
MM Terminal 2
MM Server 1 MM Server 2
Fixed access network
AAA, SecurityUser DataMobile access
network
page 16DI T.Lovricmobilkom austria
New Service ArchitectureSe
rvic
e 1
Serv
ice
2
Serv
ice
3
Network Functions
Common Functions
Applications
• Topics• Application complexity
Vertical Service Architecture
Serv
ice
1
Serv
ice
2
Serv
ice
3
Horizontal Service Architecture
•Topics:
• Generic architecture
• Specific applications
page 17DI T.Lovricmobilkom austria
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 (Application
sharing, Whiteboard)
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 (Application
sharing, Whiteboard)
Entertainment Person-to-
Person Gaming
Interactive Shows and Events
Multimedia Advertisement
Audio and Video Streaming
Entertainment Person-to-
Person Gaming
Interactive Shows and Events
Multimedia Advertisement
Audio and Video Streaming
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
Enterprise and on the road Dynamic Info Services Interactive guidance Remote Facility Control
Enterprise and on the road Dynamic Info Services Interactive guidance Remote Facility Control
IMS Services
page 18DI T.Lovricmobilkom austria
Agenda
• Short Company overview
• Motivation for IMS
• mobilkom austria and IMS
• IMS billing issues & standards
• IMS billing at mobilkom austria
page 19DI T.Lovricmobilkom austria
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
2002...2004 2005 2006...
IMS preparation: research projects
Next Generation Service Network concept
Next Generation Service Network implementation
page 20DI T.Lovricmobilkom austria
• 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
... in a complex environment ...
WAP
Internet
Telephony
Messaging
Streaming IMS
page 21DI T.Lovricmobilkom austria
... 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
page 22DI T.Lovricmobilkom austria
Agenda
• Short Company overview
• Motivation for IMS
• mobilkom austria and IMS
• IMS billing issues & standards
• IMS billing at mobilkom austria
page 23DI T.Lovricmobilkom austria
Charging Models I
There are typically four main elements to a tariff:
- Subscription
- Events
- Transferred Volume
- Session Duration
any or all of which may be used in combination !
QoS ??
page 24DI T.Lovricmobilkom austria
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
Charging Models II
page 25DI T.Lovricmobilkom austria
P-CSCF I-CSCF S-CSCF
AS/ MRFCServers
HSSPDF/CRF
BGCFMGCF MGW
GGSN
IMS : Billing sources
G-CDR’s
Bearer Volume
• PDP Session Volume
• CBB Info
• IMS Categorized
IMS Session Info
• IMS Session Info
• Application Id
• P2P Services Info..
IMS Application&Media Info
• Application_Id‘
• Duration
• Volume..
page 26DI T.Lovricmobilkom austria
32.200ChargingPrinciples
32.225ReservedforStage 3
of IMS (R5)
32.215CS Domain
Stage 3
32.205CS Domain
Stage 3
32.235ServiceDomain
Stage 3
32.200ChargingPrinciples
32.225ReservedforStage 3
of IMS (R5)
32.215CS Domain
Stage 3
32.205CS Domain
Stage 3
32.235ServiceDomain
Stage 3
Standards: Release 5
page 27DI T.Lovricmobilkom austria
32.298CDR Parameter
Description
32.296OCS Applications
and Interfaces
32.240ChargingPrinciples
32.252WLanCharging
32.251CS Charging
32.250CS Charging
32.260IMS Charging
32.27xTbd.
32.271LCS Charging
32.270MMS Charging
32.299DiameterCharging
Application
32.297CDR File Format
and Transfer
32.295CDR Transfer
32.298CDR Parameter
Description
32.296OCS Applications
and Interfaces
32.240ChargingPrinciples
32.252WLanCharging
32.251CS Charging
32.250CS Charging
32.260IMS Charging
32.27xTbd.
32.271LCS Charging
32.270MMS Charging
32.299DiameterCharging
Application
32.297CDR File Format
and Transfer
32.295CDR Transfer
32.240ChargingPrinciples
32.252WLanCharging
32.251CS Charging
32.250CS Charging
32.260IMS Charging
32.252WLanCharging
32.251CS Charging
32.250CS Charging
32.260IMS Charging
32.27xTbd.
32.271LCS Charging
32.270MMS Charging
32.27xTbd.
32.271LCS Charging
32.270MMS Charging
32.299DiameterCharging
Application
32.297CDR File Format
and Transfer
32.295CDR Transfer
Standards: Release 6
page 28DI T.Lovricmobilkom austria
TransportNetwork
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
WLAN/xDSL
IMS CoreNetwork S/I-CSCF
Inter-workingFunctions
IM-MGW
CS/PSTN
PDFAccess
Dependencies
P-CSCF
BGCF
MGCF
HSS/SLF
ServiceLayer
SupportSystems
Provisioning OSSBilling & Customer
CareOCS /
Mediation
Go(COPS)
IP connectivity
UE / SIPTerminal
Ro(Diameter)
Rf(Diameter)
ISC Other IMS/SIPNetworks
SIPSIP SIP
SIP
SIP
Mn(H.248)
SIP
Media Server(MRFP)
3d Party SP
Is this needed ?What is it ?
Mb
Cx/Dx(Diameter)
Sh/Dh(Diameter)
Mp
Mp
WSI, etc.
Ro/Rf(Diameter)
Rf(Diameter)
Rf(Diameter)
Ro/Rf(Diameter)
Generic AS
Service Interaction Manager
PresenceServer
PoC Server
Service LogicGroup
Other Enablers
MRFC
AS (e.g. Conferencing) 3d Party
GW
Service Logic
DNS /ENUM
Ut(Http)
BSF
Service LogicGroup
Auth. Proxy
Zn(Diameter)
AP-ASs(Http)
TransportNetwork
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
IPC
2G SGSN
3G SGSNRNCNode B
Node B
BSCBTS
BTS BSSGSM/EDGE
RAN GPRSPEP
WLAN/xDSLWLAN/xDSL
IMS CoreNetwork S/I-CSCF
Inter-workingFunctions
IM-MGW
CS/PSTN
PDFAccess
Dependencies
P-CSCF
PDFAccess
Dependencies
P-CSCF
BGCF
MGCF
HSS/SLF
ServiceLayer
SupportSystems
Provisioning OSSBilling & Customer
CareOCS /
Mediation
Go(COPS)
IP connectivity
UE / SIPTerminal
Ro(Diameter)
Rf(Diameter)
ISC Other IMS/SIPNetworks
SIPSIP SIP
SIP
SIP
Mn(H.248)
SIP
Media Server(MRFP)
3d Party SP
Is this needed ?What is it ?
Mb
Cx/Dx(Diameter)
Sh/Dh(Diameter)
Mp
Mp
WSI, etc.
Ro/Rf(Diameter)
Rf(Diameter)
Rf(Diameter)
Ro/Rf(Diameter)
Generic AS
Service Interaction Manager
PresenceServer
PoC Server
Service LogicGroup
Other Enablers
MRFC
AS (e.g. Conferencing) 3d Party
GW
Service Logic
DNS /ENUMDNS /ENUM
Ut(Http)
BSF
Service LogicGroup
Auth. Proxy
Zn(Diameter)
AP-ASs(Http)
IMS architecture – Overview
page 29DI T.Lovricmobilkom austria
Charging Interfaces to IMS network
Charging
Collection
Function
(CCF)
ISC
Ro
SCF
ECF
BCF CF
Rating
Function
ReRc
Rb
BGCFBGCF
Charging
Collection
Function
[ CCF ]
Billing
System
Billing
System
Rf
SGSNSGSN
GGSNGGSNGa
Online
Charging
System
(OCS)
Online
Charging
System
(OCS)
Ro
CAP
Bp
MGCF
I-CSCF
P-CSCF
S-CSCF
AS
MRFC
ChargingGatewayFunction
[ CGF ]
Bi
page 30DI T.Lovricmobilkom austria
Problem: Billing for IMS Services
Several charging layers in parallel:
Several charging sources:
IMS Session
Bearer
Content
GGSN S-CSCF AS 1 AS 2
page 31DI T.Lovricmobilkom austria
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 !)
Potential solution:
How to charge for IMS Services ?
Correlation ? In real-time ??
Only one IMS charging source !
page 32DI T.Lovricmobilkom austria
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
page 33DI T.Lovricmobilkom austria
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)?
Bearer: MSISDN
Session: User ID
Application: Credit Card
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)
page 34DI T.Lovricmobilkom austria
Agenda
• Short Company overview
• Motivation for IMS
• mobilkom austria and IMS
• IMS billing issues & standards
• IMS billing at mobilkom austria
page 35DI T.Lovricmobilkom austria
mobilkom: IMS Billing architecture
GGSNS - CSCF App. Server
(e.g. PoC)[ IPC ]
DiameterRo Ro
ORGATIDIMS OCF
IN_tm_v 5.0Online Billing
Diameter
AMDOCSCGFIMS CCF
ADATAOffline Billing
G-CDR Rf RfDiameter
VF DCCA
Post-Paid Billing
Pre-Paid Billing
page 36DI T.Lovricmobilkom austria
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
page 37DI T.Lovricmobilkom austria
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
page 38DI T.Lovricmobilkom austria
Thank you – Any questions ?
Dipl.Ing Tomislav LOVRICmobilkom austria AG & Co KGObere Donaustraße 291020 Wienwww.mobilkomaustria.com
E-mail: t.lovric@mobilkom.at
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