KRnet 2006, Seoul

Sungwon Lee / Ph.D

Mobile WiMAX Solution Team, TN-Division(Email : drsungwon@samsung.com)

IMS-based Network Convergence :

Architecture and QoS

IMSIMS--based Network Convergence :based Network Convergence :

Architecture and Architecture and QoS QoS

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Ice BreakIce Break

What's Going On?What's Going On?

Where We Are?Where We Are?

IMS OverviewIMS Overview

IMS TechnologyIMS Technology

ConclusionConclusion

ContentsContents

2/39

Ice BreakIce Break

3/39

Ice-Break Question.1Ice-Break Question.1

Who is Telco Operator, and its Telco Services ?Who is Telco Operator, and its Telco Services ?

U-OperatorU-Operator V-OperatorV-Operator W-OperatorW-Operator

PresenceInstant Messaging

VoIPConference Call

File TransferVoice Mail

SMS Information QueryInternet/Desktop Search

Satellite Image NavigationMAP Service

(Text) Language TranslationPersonal Blog

Word/Excel/PresentationPhoto Edit/Share

PresenceInstant Messaging

VoIPConference Call

File TransferVoice Mail

SMS Information QueryInternet/Desktop Search

Satellite Image NavigationMAP Service

(Text) Language TranslationPersonal Blog

Word/Excel/PresentationPhoto Edit/Share

PresenceInstant Messaging

VoIPConference Call

File TransferVoice Mail

PresenceInstant Messaging

VoIPConference Call

File TransferVoice Mail

PresenceInstant Messaging

VoIPConference Call

File TransferVoice/Photo Mail

PSTN/Cellular VoiceVideo ContentsGame ContentsRing-Back-Tone

Wall-PaperScheduled Call ForwardingCall-ID/Call Management

Address-Book ManagementCalendar/Schedule Mgnt.

PresenceInstant Messaging

VoIPConference Call

File TransferVoice/Photo Mail

PSTN/Cellular VoiceVideo ContentsGame ContentsRing-Back-Tone

Wall-PaperScheduled Call ForwardingCall-ID/Call Management

Address-Book ManagementCalendar/Schedule Mgnt.

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Ice-Break Question.2Ice-Break Question.2

What terminal type are used by Telco Operators ?What terminal type are used by Telco Operators ?

Desktop PC

Notebook PC

Dual-mode Phone

WiFi Phone

Bluetooth Phone

DECT Phone

Desktop PC

Notebook PC

Dual-mode Phone

WiFi Phone

Bluetooth Phone

DECT Phone

Desktop PC

Notebook PC

Dual-mode Phone

PSTN Phone

Cellular Phone

Desktop PC

Notebook PC

Dual-mode Phone

PSTN Phone

Cellular Phone

Desktop PC

Notebook PC

Desktop PC

Notebook PC

U-TypesU-Types V-TypesV-Types W-TypesW-Types

5/39

Ice-Break Question.3Ice-Break Question.3

What terminals are used by Telco Operators ?What terminals are used by Telco Operators ?

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Ice-Break So What ?Ice-Break So What ?

시사점시사점

IT와 Telco의 서비스를구분하기 어려운세상의 도래

유선/무선/IT 단말의경계가 무너진 세상의도래

데이터특성에 적응하는무선/복합단말시대의 도래

IT와 Telco의 서비스를구분하기 어려운세상의 도래

유선/무선/IT 단말의경계가 무너진 세상의도래

데이터특성에 적응하는무선/복합단말시대의 도래

7/39

Ice-Break Is Korea different ?Ice-Break Is Korea different ?

((Reference : Reference : 일간일간 디지탈타임즈디지탈타임즈))

Domestic A-OperatorDomestic A-Operator종합미디어그룹 표방

IHQ 지분 인수통한 연예기획/게임개발/영화제작/드라마제작 연계

음반업체인 YBM서울음반 인수 및자사 음악서비스연계

TU 미디어 통한 위성 DMB 개시

종합미디어그룹 표방

IHQ 지분 인수통한 연예기획/게임개발/영화제작/드라마제작 연계

음반업체인 YBM서울음반 인수 및자사 음악서비스연계

TU 미디어 통한 위성 DMB 개시

Domestic B-OperatorDomestic B-Operator그룹차원의 ‘콘텐츠사업 협의회’ 출범

MP3 음원 포탈강화

게임포탈 강화

삼성전자 제휴통한 홈네트워크 및 컨텐츠 사업 부문강화

BcN, VoIP, WLAN, WiBro 통한 유무선통합 사업자 추진

그룹차원의 ‘콘텐츠사업 협의회’ 출범

MP3 음원 포탈강화

게임포탈 강화

삼성전자 제휴통한 홈네트워크 및 컨텐츠 사업 부문강화

BcN, VoIP, WLAN, WiBro 통한 유무선통합 사업자 추진

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What’s Going On?What’s Going On?

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What’s going on? Sad history in our countryWhat’s going on? Sad history in our country

음성/데이터/영상/멀티미디어

통신시대를열자!

음성/데이터/영상/멀티미디어

통신시대를열자!

ISDNISDN

음성/데이터/영상/멀티미디어

통신시대를열자!

음성/데이터/영상/멀티미디어

통신시대를열자!

ATMATM

왜 10년넘도록같은이야기를해야하지?왜 10년넘도록같은이야기를해야하지?

현재현재

1:N, M:N 통신시장을열자

1:N, M:N 통신시장을열자

ISDNISDN

1:N, M:N 통신시장을열자!

1:N, M:N 통신시장을열자!

ATMATM

왜 1:N, M:N 통신시장이 안 열릴까?왜 1:N, M:N 통신시장이 안 열릴까?

현재현재

Chapter 1Chapter 1

Chapter 2Chapter 2

10/39

What’s going on? Some history of neighbor countryWhat’s going on? Some history of neighbor country

Chapter 1Chapter 1

Chapter 2Chapter 2

TCP/IP 인터넷기술을만들어보자

TCP/IP 인터넷기술을만들어보자

협대역 IP협대역 IP

광대역 IP 망과SIP으로뭔가

잼있는걸 해보자.

광대역 IP 망과SIP으로뭔가

잼있는걸 해보자.

광대역 IP광대역 IP

음성/데이터/영상/멀티미디어

통신시대를열자!

음성/데이터/영상/멀티미디어

통신시대를열자!

현재현재

간단한문자나몇줄 보내보자간단한문자나몇줄 보내보자

협대역 IP협대역 IP

IM으로 1:N, M:N은자연스러운

통신 방법/수단

IM으로 1:N, M:N은자연스러운

통신 방법/수단

광대역 IP광대역 IP

문자외음성/멀티미디어컨텐츠의 1:N, M:N 통신을하자!

문자외음성/멀티미디어컨텐츠의 1:N, M:N 통신을하자!

현재현재

11/39

Where We Are ?Where We Are ?

12/39

Telco vs. IT ?Telco vs. IT ?

Where are we going? SolutionsWhere are we going? Solutions

WARWARWAR PEACEPEACEPEACE

Make your choice !Make your choice !

OROROR

13/39

Where are we going? Telco meets ITWhere are we going? Telco meets IT

Telco 요구Telco 요구

표준화된 서비스 및인터페이스

안정된 QoS 보장 방안

다양한과금 방안

신뢰성있는 보안 방안

국제/국내 사업자간로밍 방안

수익성있는 서비스 제공

표준화된 서비스 및인터페이스

안정된 QoS 보장 방안

다양한과금 방안

신뢰성있는 보안 방안

국제/국내 사업자간로밍 방안

수익성있는 서비스 제공

IT 요구IT 요구

표준화된 서비스 및인터페이스

개방형개발 환경

신속한제품/서비스 적용 용이

국제/국내 사업자간호환 용이

QoS/과금/보안 기능기본 제공

표준화된 서비스 및인터페이스

개방형개발 환경

신속한제품/서비스 적용 용이

국제/국내 사업자간호환 용이

QoS/과금/보안 기능기본 제공

IMS IMS 통한통한 TelcoTelco와와 ITIT의의 IP IP 기반기반 컨버전스컨버전스

14/39

IMS SummaryIMS Summary

SIPProtocol

StandardService

IntegratedBilling Standard

User/ServiceQoSIMS

(VoIP & SIP Service as Killer Application)

WirelineWirelineNGN/NGN/BcNBcN

33GPP2GPP2CDMA2000

Wireline Wireline ExtensionExtension(ITU/ETSI)(ITU/ETSI)

OMA : Open Mobile Alliance

33GPPGPPWCDMA WiBroWiBro OMAOMA

WiFi & Others

Standard AllStandard All--IPIPMobile ServiceMobile Service

IMS는 Telco 입장에서정의한표준화된 SIP서비스, 과금및 QoS 제어규격IMS는 Telco 입장에서정의한표준화된 SIP서비스, 과금및 QoS 제어규격

15/39

IMS OverviewIMS Overview

16/39

IMS CharacteristicsIMS Characteristics

Initially Defined by 3GPP

Builds on IETF protocols

All-IP protocols

Service & Control

Mixed Multimedia

Access Independent (Fixed & Mobile)

17/39

IMS Standard History IMS Standard History

2002 Jun. : 3GPP Rel.5 Closed - First & Base IMS platform

2004 Dec. : 3GPP Rel.6 Closed - Basic converged services

2005 Now : 3GPP Rel.7 Going - Emergency calls, Enhanced QoS, FMC

• ETSI/TISPAN working for fixed IMS

• OMA standardizing IMS services

18/39

IMS Standard Group Relationship IMS Standard Group Relationship

19/39

IMS Layered ArchitectureIMS Layered Architecture

Old FashionOld Fashion IMS StyleIMS Style

20/39

IMS Interoperable & Manageable ServiceIMS IMS IInteroperable & MManageable SService

Standardized environment for operators to manage IP multimedia communication sessions

Platform for application and service development

Access network independent

Approach to managed and cost-effective transition towards service centric world

IMS Terminal Equipment

IMS Terminal Equipment

AccessNetworkAccess

Network

IP CoreNetworkIP Core

Network

IMS Core NetworkIMS Core Network

IMS Application Servers

IMS Application Servers

IMS ServicesIMS Services

AuthenticationSession ControlChargingQoSRoamingSecurity

PresenceInstant MessageVoIPGamePoCAnd so on

TeliaSonera TeliaSonera (Reference : IMS Conference Asia (Reference : IMS Conference Asia ’’05)05)

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IMS Standard ServicesIMS Standard Services

Presence-based servicesInstant messagingVoice Telephony (VoIP)Video TelephonyPush-to media services (push-to-talk/view/video)Content sharing / data transferGroup chatMultimedia StreamingWeb BrowsingMultiparty gamingPIM services, such as calendars and alertsMultimedia (Audio/Web/video) conferencing

….. And the list goes on

22/39

Benefits from Operator PerspectiveBenefits from Operator Perspective

FOCUS ON YOUR REVENUE CREATION !!FOCUS ON YOUR REVENUE CREATION !!

Single sign-on user authentication

One user data base / subscription handling

One multimedia session control

One billing interface & differentiated charging

One QoS interface & differentiated quality

One common foundation for fixed, mobile and enterprise

Pervasive standard based terminals, and systems

Smooth evolution of services

23/39

Benefits from Developer PerspectiveBenefits from Developer Perspective

FOCUS ON YOUR CORE COMPETENCE !!FOCUS ON YOUR CORE COMPETENCE !!

Enabling affordable, accelerated development and deployment

Manageable quality of service

Roaming freedom

High degree of interaction between mobile & fixed-line users

24/39

IMS TechnologyIMS Technology

25/39

IMS Basic Components OverallIMS Basic Components Overall

VisitedVisitedDomainDomain

HomeHomeDomainDomain

Sh• First contact point

• Provides provicy control and QoS authorization

• Local services, like emergency calls and local

numbering

Proxy-CSCF

Megaco

MGW

UAUA P-CSCFP-CSCF I-CSCFI-CSCF

HSS ASSLF

MRFCGm Mw Mw

Dx Cx ISC

Mrcompression

SIP SIP SIP

SIP

SIP

CxDiameter

Accesspoint to domain

Hides topology and

configuration

Interrogating-CSCF

• Session control services

• Registration, AS usage, charging, etc

Serving-CSCF

MGCFBGCF

S-CSCFS-CSCF

Mj

Mi Mg

Mc

MRFP

26/39

Home Subscriber Server (HSS)Home Subscriber Server (HSS)

HLR

Subscriber registration information management until Rel.4

HSS

Feature enhancement for IM CN Subsystem (includes AAA function)

HLR is subset of HSS

27/39

MGW (MGCF & IM-MGW)MGW (MGCF & IM-MGW)

MGCF (Media Gateway Control Function) Performs protocol conversion between ISUP and the IM subsystem call control protocols.Controls the parts of the call state that pertain to connection control for media channels in an IM-MGW.Communicates with CSCF.Selects the CSCF depending on the routing number for incoming calls from legacy networks.

IM-MGWMGW on IMS as like CS-MGW on CS Domain in R’4

28/39

Multimedia Resource Function (MRF)Multimedia Resource Function (MRF)

MRF = MRFC (Control Plane) + MRFP (Bearer Plane)

Multimedia conference control

Media conversion, mixing, trans-coding and processing

Multimedia message replay

Voice mail service

Tone announcement

29/39

Service InterfaceService Interface

Native SIP servicesSIP AS는 S-CSCF와 SIP interface를통해 서비스제공

CPL 또는 JAVA API 로 작성

Legacy IN servicesCAMEL (Customized Applications for Mobile Enhanced Logic)IM-SSF : interface between ISC and CAP

3rd party servicesOSA AS (Open Service Access Application Server)OSA SCS: interface between ISC and OSA API

30/39

IMS Architecture (Case: IMS to IMS)IMS Architecture (Case: IMS to IMS)

IMS

IMS

UTRAN

SGSN GGSNUE

PS Domain

UTRAN

SGSN GGSNUE

PS Domain

I-CSCFI-CSCF

Go Gi

I-CSCF

P-CSCFS-CSCF

Mw

I-CSCF

P-CSCFS-CSCF

Mw

HSS

Cx

Cx

HSS

Cx

Cx

Other IP/IMS network

Mm

Other IP/IMS network

Other IP/IMS network

Other IP/IMS network

Mm

CSCFs are the IMS entities responsible of the call control: there are 3 types of CSCFs depending on their role:•P-CSCF (Proxy CSCF)•S-CSCF (Serving CSCF)•I-CSCF (Interrogating CSCF)

The PS domain provides the IP bearer to access to the IMS, i.e. a PDP context.

The HSS holds the IMS service profile of the subscribers.

S-CSCF interconnects to external IP networks and other IMS networks.If THIG is used by the operator to hide its internal configuration, the connection to external networks goes through an I-CSCF.

GiGi

Traffic PlaneControl Plane

Ref) Steve TSANG-KWONG-U, France Telecom

31/39

IMS Architecture (Case: IMS to PSTN)IMS Architecture (Case: IMS to PSTN)

IMS

IMS

UTRAN

SGSN GGSNUE

PS Domain

UTRAN

SGSN GGSNUE

PS Domain

I-CSCFI-CSCF

Go Gi

I-CSCF

P-CSCFS-CSCF

Mw

I-CSCF

P-CSCFS-CSCF

Mw

HSS

Cx

Cx

HSS

Cx

Cx

Other IP/IMS network

Mm

Other IP/IMS network

Other IP/IMS network

Other IP/IMS network

Mm

SGWMGCF

BGCF

IMS-MGW

Legacy/PSTN

Mk

Mi

Mg

Mj

MnGi

SGWMGCF

BGCF

IMS-MGW

Legacy/PSTN

Legacy/PSTN

Mk

Mi

Mg

Mj

MnGi

MRF

Gi

Mr

MRF

Gi

Mr

PDF

Go

Gq

PDF

Go

GqThose entities are

responsible for interworking

between IMS and CS domain/PSTN

In Release 6, the PDF can be separated from the P-CSCF. Those two entities are then connected through the Gq interface.

The MRF is used for multiparty call

control

Traffic PlaneControl Plane

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IMS Architecture (Case: Off-line Charging)IMS Architecture (Case: Off-line Charging)

IMSIMS

UTRAN

SGSN GGSNUE

PS Domain

UTRAN

SGSN GGSNUE

PS Domain

I-CSCF

I-CSCF

P-CSCFS-CSCF

HSS

Other IP/IMS network

Other IP/IMS network

SGWMGCF

BGCF

IMS-MGW

Legacy/PSTN

Legacy/PSTN

MRF

PDF

Traffic PlaneControl Plane

Rf

CCF

CGF

Ga

For offline Charging, CCF and CGF are responsible for collecting charging

information from PS domain and IMS entities.

Gz

33/39

IMS Call Flow Example (Case: IMS to IMS)IMS Call Flow Example (Case: IMS to IMS)

P-SCSFP-SCSFVisited B

S-CSCFS-CSCF

Home A

1. Invite

2. Invite

7

10

11 12

13

15

17

P-CSCFP-CSCFVisited A

18

AB

GGSNGGSNSGSNSGSN

Radio Access NetworkRadio Access Network

GGSNGGSNSGSNSGSN

Radio Access NetworkRadio Access Network

S-CSCFS-CSCF

Home B

8

I-CSCFI-CSCF

HSSHSS

9

14

6

3. CX-Query 4. CX-Query Resp

I-CSCFI-CSCF

HSSHSS

5. Invite

16. OK

Traffic Path

Signaling Path

34/39

QoS in IMSQoS in IMS

P-CSCF S-CSCF

SDP InspectionSDP Inspection

SDPSDP inspection performs based on Local Policy.

SDP inspection performs based on Local Policy or User Subscription

AS checks SDP and request confirmation for the resource reservation at the endpoint.

MSHSS/AAA

AS

Operator based Policy Information transfer to the S-CSCF when Registration-time

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ConclusionConclusion

36/39

More? Why Service ? (Case: TeliaSonera)More? Why Service ? (Case: TeliaSonera)

Today’s revenues mainly from access

Role of access decreasing

Price pressure, cost-efficiency

Value moving towards services

Services main differentiator

Multiple services rather than one killer application

• Shorter service life-cycles

Service management and delivery in essential role

Terminals have key role in ensuring end-to-end QoS

Terminal diversity challenge

IMS as a future platform for service developmentIMS as a future platform for service development

((Reference : IMS Conference Asia Reference : IMS Conference Asia ’’05)05)

37/39

More? Why Service ? (Case: France Telecom)More? Why Service ? (Case: France Telecom)

Offer clients a New Experience in Telecom services

Give access to a whole world of services

“A new generation of telecom services

to change our everyday lives”

Change means providing both high value and simplicity

Move from “access to networks” to “access to services”

((Reference : Reference : NExTNExT Vision Presentation, June Vision Presentation, June ’’05)05)

38/39

More? Why Service ? (Case: British Telecom)More? Why Service ? (Case: British Telecom)

((Reference : IMS Conference Asia Reference : IMS Conference Asia ’’05)05)

39/39

Final VisionFinal Vision

Fast, Reliable and QoS GuaranteedFast, Reliable and QoS GuaranteedSeamless Active HandoffSeamless Active Handoff

Always Best ConnectedAlways Best ConnectedUbiquitous Networks & ServicesUbiquitous Networks & Services

CDMA2000CDMA20001X/DO/DV1X/DO/DV

WCDMA/WCDMA/HSDPAHSDPA

MobileMobileWiMAXWiMAX WLANWLAN Bluetooth/Bluetooth/

UWBUWB

Thank you!Thank you!Thank you!