报告人简历

Service Delivery in IMS –the PoC case study

DRAFT

1

报告人简历

Dirk Weiler ： Vice President of Siemens Information and Communication Mobile, based in Munich, Germany, is responsible for all standardization and fora activities of Siemens Mobile Networks worldwide. He has 18 years of experience in mobile communication. After his graduation in Physics from the University of Cologne in 1985, he started working for Siemens in the development of the analog mobile communication system C450. He hold various management positions in the areas of development, research, intellectual property, standardization and marketing. Since 1988 he has been working actively in standardization in ETSI, 3GPP, ITU, IETF.

DRAFT

Service Delivery in IMS –

the PoC case study

CCSA Workshop on OMABeijing, 20 August 2003

Dirk WeilerVice President Standardization and Fora,

Siemens Information and Communication Mobile

3Service Delivery in IMS –the PoC case study

DRAFTContent

The Services Delivery Challenge

Services Infrastructure

Operators Choice

The PoC case study


DRAFTServices vision

Bandwidth

real-time

lowdelay

besteffort

QoS

VideoConversation

VideoConversation

AudioConversation

AudioConversation

VideoStreaming

VideoStreamingInstant

MessagingInstant

Messaging

SMSSMS MMSMMS

For increased ARPU beyond GSM/GPRS,For increased ARPU beyond GSM/GPRS,UMTS (IMT-2000) service scenarios includeUMTS (IMT-2000) service scenarios includeany combination of applications / servicesany combination of applications / services

presented seamlessly to the userpresented seamlessly to the user

For increased ARPU beyond GSM/GPRS,For increased ARPU beyond GSM/GPRS,UMTS (IMT-2000) service scenarios includeUMTS (IMT-2000) service scenarios includeany combination of applications / servicesany combination of applications / services

presented seamlessly to the userpresented seamlessly to the user

Pushto TalkPush

to Talk


DRAFT

Operators need to get ready for an increasing mixture of services over the PS-Domain

Real-time and peer-to-peer services are part of the scenarios

Mbit/

User/

Month

Browsing & Download

Messaging

Real-Time Multimedia

Voice (Minutes of Use x 9,6 kb/s)

Source: Siemens Mobile Networks Marketing, 2003

50

100

150

200

250

300

350

2003 2004 2005 2006 2007 20080

Note: Figures include consumer and enterprise traffic

Traffic Forecast for Mobile Services


DRAFTServices Presentation to the User

UMTS (IMT- 2000) communication scenarios provide any combination of multimedia services

Examples are:- text and picture messaging- voice and video conversation- streaming video- Voice, video and data conferencing

UsageScenario

IMIM

Push2TalkPush2Talk

VideoVideo

ConferenceConference

Bandwidth

real-time

lowdelay

besteffort

QoS

VideoConversation

VideoConversation

VideoStreaming

VideoStreaming

InstantMessaging

InstantMessaging

SMSSMS MMSMMS

AudioConversation

AudioConversation

Push2Talk

Push2Talk

conversational

streaminginteractive

background

Se

rvic

es

Ca

teg

ori

es Services of different categories

should be easy to use and presented seamlessly to the user


DRAFTServices Deployment and Operation

To increase (and retain) the subscriber baseoperators are facing the following challenges:

Enable instant deployment and upgrade of services to stay competitive

Run on a large variety of multi-vendor devices-Mobile terminals-PDAs-PCs, Laptops

Enable seamless service access for the roaming user

Allow inter-working of services with other operators

Low per-service CAPEX and OPEXto earn money on low priced services as well


DRAFTContent



Operators Choice

The PoC case study


DRAFTNetwork Elements for Mobile PS Services

GGSNRAN SGSN

PS DomainPS Domain

IP InternetR

PSTNPLMN

The PS Domain provides connectivity to mobile services based on IP

Terminals


DRAFTEnabling Mobile Multimedia Services

GGSNRAN SGSN Internet

Session-ControlService-Control

QoS-Control

ServiceSubscriptionsFI Support

R

SIPSIP

IP

PSTNPLMN

Introducing multimedia and peer-to-peer services into the mobile PS-domain requires new mechanisms

- Using the SIP Session Control is the industry trend

- Basic service-support functions are required(e.g. Session- / Service- / QoS-Control, Authentication, Feature Interaction, Conferencing Support)

ConferencingSupport

SIP-enabledTerminals




GatewayControl

Function

MediaGateway

PSTNPLMN

SIPSIP

ISUP

SIP

IPIP

TDM

R

Inter-working with PSTN / CS-voice services require a media gateway and a corresponding control function


Session-ControlService-Control

QoS-Control

ServiceSubscriptionsFI Support

ConferencingSupport




CSCFCall Session

Control Function

HSSSubscription Service

HSS

MRFResource Function

MGCFGatewayControl

MGWMedia

Gateway

PSTNPLMN

SIPSIP

ISUP

SIP


IMSIMS

IPIP

TDM

R

The “IP Multimedia Subsystem” (IMS) standardized by 3GPP provides the required service support functions

The resulting benefits for the operator are:- service support functions are implemented once and utilized

by many applications, thus- reducing implementation time and effort for the applications- the standard enables multi-vendor environment- standardized future proof architecture




MGCF

MGW

PSTNPLMN

ISUP

IMSIMS

IPIP

TDM

Further Enabling Services added to the infrastructure serve as advanced building blocks for mobile applications

Scenarios might include the use of different protocols (SIP, http, …)

SIP, SIMPLE, HTTP LocationServer

LocationServerPresence

ServerPresence

Server

EnablingEnablingServiceService

R

SIPSIP

SIP

-en

ab

led

Term

inals

PS/LSPS/LS

CSCFCSCFHSSHSS HSS

SIP

SIP


DRAFT

…Service

…Service

Applications for Mobile Services


MGCF

MGW

PSTNPLMN

ISUP

IMSIMS

IPIP

TDM

SIP, SIMPLE, HTTP LocationServer

LocationServerPresence

ServerPresence

Server

EnablingEnablingServiceService

R

SIPSIP

SIP

Term

inals

PS/LSPS/LS

CSCFCSCFHSSHSS HSS

SIPR

TP

ApplicationsApplicationsClientClient SIP, HTTP

PoCServicePoC

ServiceIMService

IMService

The uniform infrastructure enables smooth integration of different services from the user perspective


DRAFTContent



Operators Choice

The PoC case study


DRAFT

Choice of Business Model #1“Service completely hosted by MNO”

Peer to PeerService accessAlternative Access

IMSIMS

UMTS/GPRS

Ena

blin

gS

ervi

ces

Ena

blin

gS

ervi

ces

HLRHSS MNO

ServicesMNO

Services

InternetServicesInternetServices

MNO

WLO

Telco

ISP/ASP

GWGW

GWGWPSTNxDSL

GWFWGWFW

WLAN

user paysfor serviceand access

GWGW

IntranetServicesIntranetServicesLAN

Enterprise GWFWGWFW

GW GatewayFW Firewall

The MNO is able to expand the value chain including higher value services

End to End service delivery by MNO

Alternative services access possible


DRAFT

Choice of Business Model #2“MNO provides services with partners”


IMSIMS

UMTS/GPRS

Ena

blin

gS

ervi

ces

Ena

blin

gS

ervi

ces

HLRHSS MNO

ServicesMNO

Services

MNO

WLO

Telco

ISP/ASP

GWGWPSTNxDSL

WLAN

user paysfor serviceand access

GWGW


Enterprise GWFWGWFW


The MNO is able to maintain full business relationship to the user while including 3rd party services in his portfolio

PartnerServicesPartner

ServicesGWGW

GWFWGWFW

GWFWGWFW

Se

rvic

eC

on

tra

ct

RevenueShare

User authentication and charging by MNO

Alternative services access possible


DRAFT

Choice of Business Model #3“MNO provides access only”


IMSIMS

UMTS/GPRS

Ena

blin

gS

ervi

ces

Ena

blin

gS

ervi

ces

HLRHSS MNO

ServicesMNO

Services

MNO

WLO

Telco

ISP/ASP

GWGWPSTNxDSL

WLAN

user paysfor access

GWGW


Enterprise GWFWGWFW


The MNO provides access only (“Bit Pipe”)

PartnerServicesPartner

ServicesGWGW

GWFWGWFW

IP-basedMultimedia

IP-basedMultimedia

user paysfor service

Access business separated from services business

Operator provides access to the Internet allowing mobile customers to choose from any (competing) services in the web


DRAFTOperators Decision Points

IMSIMS

Do we want to deploy IP based real-timeand non-real-time

multimedia services?

Do we want to mix service categories (conversational, streaming, messaging)

for multi-modal communication? New MNO business

opportunities

Do we want to control the new services beyond providing the bit-pipe?

MNO’s choice of business

model

Do we want to use standardized components?

Do we want to provide these services on a homogeneous infrastructure?

Best practice


DRAFTSingle Platform Advantage

Single infrastructure reduces OPEX- Single type of interfaces to Admin and Billing- Central subscriber data base

Single infrastructure reduces CAPEX in the long term- less effort to implement- less effort to adapt to existing components

Single infrastructure enables inter-working between applications- Common functions (e.g. group management)- Common status information (e.g. presence, location)

Application

A.1Application

A.1

Admin1Admin1

BillingBillingIf IfIf

Application

A.2Application

A.2Application

A.3Application

A.3

Infra-structure

Admin2Admin2 Admin3Admin3

Infra-structure

Infra-structure

Expensive !!

Application

A.1Application

A.1

BillingBillingIf

Application

A.2Application

A.2Application

A.3Application

A.3

AdminAdmin

Infra-structure

Lower OPEX and CAPEX


DRAFTService Evolution

Bandwidth

real-time

lowdelay

besteffort

QoS

VideoConversation

VideoConversation

AudioConversation

AudioConversation

VideoStreaming

VideoStreaming

IMIM

SMSSMS MMSMMS

PTTPTT

IMS nice to have

IMS recommended

IMS mandatory

Stronger demand for an IMS control infrastructure when moving towards real-time services (e.g. Voice, Video, Conferencing)

Starting early on IMS avoids a change of the entire infrastructure later!


DRAFTContent



Operators Choice

The PoC case study


DRAFTMarket expectations on service delivery

Support of new business models Enable easy service development Support of fast service deployment Enable innovative mobile multimedia services like

Customized infotainment (gaming)

Enhanced voice/video communication over IP (push-to-talk)

Integrated services for- Enterprises (integrated calendar services)- Mobile business workers (mobile intranet)- Consumers (click to call from web pages)

Streaming of voice/video

Support flexible charging and m-payment Support quality of service Provide global roaming


DRAFTService delivery in 3GPP (IMS)

3GPP addresses some of these market expectations 3GPP specifies the IP Multimedia Subsystem (IMS) that

provides Architecture for the realization of multimedia services

Framework for charging Roaming Security Mechanisms for service provisioning by 3rd parties

– IMS services/functions• Presence

• Messaging

• Group management

• Conferencing

– IMS capabilities• Session management

• User data access

• Event subscription and

notification

• Authentication


DRAFTService delivery in OMA

OMA aims at addressing all market expectations OMA specifies a service environment that comprises

Mechanisms for service provisioning by 3rd parties

– Service enablers• Location

• Presence and availability

• Messaging

– Common functions (tbd)• Authentication

• Charging

• ...


DRAFTRelation and overlap of domains

PoC

(ffs)

Charging

Service A Service B Service C

Service Enablers and

Common Functions

IMS Service Control

IMS Session Control

Ses

sio

n

Man

ag

eme

nt

Co

nfe

ren

cin

g

Gro

up

Man

ag

eme

nt

PresenceMessaging

Pre

sen

ce

IMS

Mes

sag

ing

Connectivity

(ffs)

OMA Domain

3GPP/3GPP2Domain

IMS

Ch

arg

ing

Fra

mew

ork

IMS

Ne

two

rk A

rch

itec

ture

Stepped demarcation

Border of domains

These specifications are either not complete or may not necessarily exist in 3GPP2

* *

*

**

Currently the specification work of 3GPP partly overlaps with OMA activities– Degree of overlap varies and depends on particular issues– A straight demarcation line cannot be introduced at present


DRAFT

Scope of OMA

(OSE)

Scope of 3GPP/3GPP2

(IMS service Provisioning)

IMS Session Control layer(X-CSCF, HSS, ...)

Enabling Services Layer

Application Layer(e.g. PoC, Chat, BuddyList)

S-CSCF

ISC

proprietary

SIP-AS

SIP-AS

OSA

OSA-GW

OSA-AS

Relation to be clarified

Adjust the scope of 3GPP and OMA

The goal – Establish continuity of standardization

process– Prevent fragmentation of standards– Consistent reuse of 3GPP IMS

capabilities and mechanisms by OMA service enablers (e.g. Push-to-Talk over

Cellular, Instant Messaging, Presence)

The benefit– Accelerate the service enablers

definition process by leveraging IMS capabilities in an interoperable way

– Protect heavy investments in standardization efforts and product development of IMS

– Save resources by avoiding duplcation of work


DRAFTWhat is PoC?

PoC – push to talk over Cellular

What it is:


DRAFTPoC as an example for work split

PoC client

GLMS

Im

Is If

It

AC

CE

SS

NE

TW

OR

K

PoC

Serv

er

SIP

/ I

P C

ore

(b

ase

d o

n IM

S/M

MD

cap

ab

ilitie

s)

Ik

Bold box identifies PoC functional entities

Presence Server

Ipl

Ips

Ipp

It: Floor Control and media Is: PoC Client to Proxies Session Signaling If: Proxy to PoC Server Session Signaling Im: Group Mgmt to PoC Client Ik:Group Mgmt to PoC Server

IMS, ISC

IMS, Ut

IMS, Gm


DRAFTRelation of IMS and PoC

PoC client - SIP/IP Core POC Is = IMS Gm

- Session signaling, authentication, registration

SIP/IP Core – PoC Server PoC If = PoC ISC

- Service signaling and charging

PoC Client – Group List Management Server PoC Im = IMS Ut

- Group management


DRAFT

Collaboration between 3GPP/2 and OMAThe way forward

Compatibility of release schedules Ensure mutual visibility and communication of Work

Programme and Work Items Visibility of each other’s WI progress

Mutual information on a periodic basis of specific WI status and progress

Establishment of coordinators on WG/WI level Avoid additional/unnecessary requirements documents

Exchange information on periodic basis of requirements documents and their current status

Resolving interaction with common third parties Agree on which organisation is the lead contact into

specific third organisations to ensure consistency of inputs Avoiding duplication of work

Need to review current list of WIs to identify any overlap Identify in which organisation each work area is best

performed and identify a single responsible group

DRAFTService Delivery in IMS – the PoC case study

CCSA Workshop on OMABeijing, 20 August 2003

Dirk Weiler <[email protected]>Vice President Standardization and Fora,

Siemens Information and Communication Mobile

Thank You Thank You for Your for Your

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