p715 1 dot’98 workshop, september 1998 the eurescom services platform lambert j.m. nieuwenhuis...

1P715

DOT’98 Workshop, September 1998

The EURESCOM Services Platform

Lambert J.M. Nieuwenhuis

Project Leader EURESCOM P715

KPN Research

The Netherlands

2P715


EURESCOM Project 715

• Assessment of distributed object technologies based on experiments with commercially available products

• Experiments using CORBA middleware technologies based on architectural principles of TINA

• service architecture• connection management• end-user services

Helsinki Helsinki Telephone Telephone Company Company

Deutsche Deutsche TelekomTelekom FranceFrance

TélécomTélécom

KPN KPN

British British TelecomTelecom

TelecomTelecomÉireannÉireann

3P715








TélécomTélécom

KPN KPN



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IT is a key technology

processing

networks transmission

computers

InformationTechnology

?

5P715


network

DOT in Telecommunications

computing nodesand switches

system software

middleware

distributedenvironment

telecommunicationsservices

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TélécomTélécom

KPN KPN



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CORBA 2.0

• OMG’s CORBA provides the technologies to build TINA’s distributed processing environment...

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Object Request Broker

‘object’‘object’

Object Request Broker

interface specification

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CORBA 2.0

DynamicInvoc.

ClientIDLstubs

ORBInterface

DynamicStaticInvoc.

StaticSkeleton

ObjectAdapter

Object Request Broker core

Client

Object implementation

Implem.repository

Interfacerepository

10P715


CORBA interoperability

Dynamic Invocation Interface

IDL stubsORB

interface

Static skeleton

Dynamic skeleton

Object Adapter

ORB Core

Dynamic Invocation Interface

IDL stubsORB

interface

Static skeleton

Dynamic skeleton

Object Adapter

ORB Core

Client

Object implementation

ORB X

ORB Y

IIOP

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Interworking of platforms

ethernet

Finland

United Kingdom

Netherlands

IP network

France

Germany

Ireland

• Orbix• Visibroker

• Orbix• HP Orb plus• omniOrb• DCOM

• Orbix

• Orbix• Distributed Smalltalk

• Sun NEO• VisiBroker

• Orbix• COOL

ISDNIP

CORBA

Platform technologies

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TélécomTélécom

KPN KPN



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TINA Business Model

Broker

RetailerEnd-userThird party Service

Provider

Connectivity Provider

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TINA Reference Points

Broker


3 Pty Service Provider

RetailerConsumer

TCon TCon TCon

CSLN LNFed

BkrBkrBkr

Ret-Ret

3 PtyRet

3 Pty

Bkr

Service Architecture

Network architecture

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TélécomTélécom

KPN KPN



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TINA Reference Points

Broker


3 Pty Service Provider

RetailerConsumer

TConTCon TConTCon TConTCon

CSLNCSLN LNFedLNFed

BkrBkrBkrBkrBkrBkr

Ret-RetRet-Ret

3 Pty3 PtyRetRet

3 Pty3 Pty

BkrBkr

Service Architecture

Network architecture

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Access and usage parts

Access: secure context

Usage: generic service session control

Consumer Retailer

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Access: secure context

Usage: generic service session control

Consumer Retailer

Access and usage parts

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Ret Reference Points

PA

UAP

IA

UAAccess

Usage

Consumer Retailer

PA = Provider Agent

UAP = User Application

IA = Initial Agent

UA = User Agent

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TélécomTélécom

KPN KPN



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Audio-visual streams support

DPE

Bindingobject

ISDN connectionISDN connection

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Bindingobject

Computationalstreamobject

Control InterfaceControl Interface

Stream InterfaceStream Interface

Computationalstreamobject

Modeling streams...

• Binding object• abstracts from network and local resources

• Binding object models• point-to-point• point-to-multipoint• multipoint-to-multipoint

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Binding objectStreamobject

Streamobject

Mixed control

Stream ChannelStream Channel

Streamobject

Streamobject

CSMOMG A/V control

e.g. H320 signaling

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Connection establishment

StreamCtrl

StreamEndPoint

VDev

StreamEndPoint

VDev

1. Create/Bind 1. Create/Bind

2. Create 2. Create

3. Configure

4. Connect

5. ConnectReq

6. Flow

MMDevice MMDevice

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TélécomTélécom

KPN KPN



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End-user services

• Chat service• Connect 4• Distributed Scheduler• Information Retrieval of

MHEG 5 content• Shared whiteboard• Value Added WWW• Video on Demand

Info

rmat

ion E

xcha

nge

P715 DOT’98 Workshop, September 1998

Current status: 52 experiments...

• Platform building• 19 experiments

– 10 completed– 6 running– 3 proposals

• Service Management• 12 experiments

– 8 completed– 3 running– 1 proposal

• Streams• 11 experiments

– 7 completed– 3 running– 1 proposed

• End-user services• 10 experiments

– 3 completed– 5 running– 2 proposed


Conclusions (1):

• Benefits of CORBA• standardised way to DOT• solution for integration• provides open interfaces• supports deregulation• fast time-to-market solutions• IDL specification support development


Conclusions (2)

• Experience gained with CORBA• P715 project has succesfully built a pan-European

multi-vendor CORBA platform based on TCP/IP over N-ISDN connections.

• CORBA 2.x interoperability based on IIOP is adequate, however some problems exist.

– more stable implementations are required• First results with OMG A/V Stream control

prototype are encouraging. • CORBA systems need additional support for

persistency, transactional behaviour, scaleability, security, and maintenance

• More and better tools for specification, development, and testing of DOT systems


Conclusions (3)

• Strong points of TINA• Business model

– bridges gap between real world and technology

– makes telecom business more understandable

• Reference Points– provides common

set of concepts

• Weak points of TINA• Monster specification

– too many problems addressed?

• Lack of industrial support• Emerging alternatives

– e-commerce– Java / CORBA /

Internet combination• Network Resource

Architecture– too centralised?


Recommendations

• EURESCOM P9xx project:• Technology Assessment of Middleware for

Telecommunications• continue hands-on experiments and manage

and maintain EURESCOM Services Platform• technology assessment of persistency,

transactional behaviour, scaleability, security, and maintenance in DOT systems

• besides CORBA also other middleware components, e.g., Microsoft’s COM+, Internet and Web technologies

• Support industrial standardisation organisations, e.g., OMG Telecom TF, TINA WGs

32P715



33P715



• Project Management• Lambert J. M. Nieuwenhuis and Erik Peeters• KPN Research, The Netherlands• phone: +31 50 582 12 02• fax: +31 50 312 24 15• [email protected]

• Project Supervisor• Amardeo Sarma• EURESCOM GmbH Heidelberg• phone: +49 6221 9 89 0• fax: +49 6221 9 89 209• [email protected]

• World Wide Web• http://www.eurescom.de

p715 1 dot’98 workshop, september 1998 the eurescom services platform lambert j.m. nieuwenhuis...

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