Migration Scenarios to NGN - TT · Migration Scenarios to NGN ... Hanoi, Vietnam, 15-16 May 2006 9 ITU-T Migration Scenario – Class 5 TDM Network ... Eelco Blok, KPN managing board

ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006

International Telecommunication UnionITU-T

Migration Scenarios to NGNMigration Scenarios to NGN

Steven Lim Shue PingProduct Manager – NGN Voice Solutions

Siemens Communications Fixed Network Asia Pacific Regional Headquarter

ITU-T Workshop on “Next Generation Networks“Hanoi, Vietnam, 15-16 May 2006 2

ITU-T

Embedded Telephony Subscriber Base

2002 2003 2004 2005 2006 2007 2008 20090,0

0,5

1,0

1,5

Subs

crib

erLi

nes

(in b

illion

s)

Source: ITU Main Telephone Lines and Dell’Oro Group estimates (Q2/2005)

TDM-based

NGN-basedPOTS

VoBB

VoIP – The POTS of the FutureThe VoIP market is taking off in all regions of the world

IP-based

20152009


ITU-T

NGN Migration Approaches

o Two steps to migrate to NGN:• Softswitch based PSTN Emulation

— Highlights : 100 % preservation of TDM voice features

• IP Multimedia Subsystem (IMS) based PSTN Simulation— Highlights : Some important voice features +

NEW multimedia services


ITU-T

Definition

o PSTN/ISDN EmulationMimicking a PSTN/ISDN network from the point of view of a legacy terminal by an IP network, through a gateway. All PSTN/ISDN services remain available and identical (i.e. with the same ergonomics) such that end users are unaware that they are not connected to a TDM-based PSTN/ISDN.

o PSTN/ISDN SimulationThe provision of PSTN/ISDN-like services to advanced terminals such as IP-phones. There is no strict requirement to make all PSTN/ ISDN services available or identical, although end users expect to have access to the most popular ones, possibly with different ergonomics.


ITU-T

IP Transport (Access and Core)

Resource and Admission Control Subsystem

Core IMS

AS

ChargingFunctions

Mw

Mw Mw/Mk/Mm

Mr

Mg

Mj

Mi

Mp Mn

Gm

Gq

ISC Cx

Dx

Dh

Sh

Ic

Rf /Ro

Rf /RoCx

Ib

Ia

Id

If

Ie

Mi

Mw

NetworkAttachmentSubsystem

ASChargingFunctionsHSS

S-CSCF I-CSCF

SLF

BGCF

MGCFMRFCP-CSCF

UE

A-BGF MRFP

PSTN/ISD

N

T-MGF

SGF

I-BGF

Other IP N

etworks

IBCF

IWF

NGN Architecture


ITU-T

PSTN Emulation Architecture

Media Gateway for Trunks

POTS

Multi-ServiceAccess Node

Softswitch

ISDN

IP Core Network

SS7

PSTN Network

SS7Switch STP

POTS/ISDN

ResourceServer

xDSL

Media Gateway for Access

V5.2

V93DLUDLUDLU ISDN-PRI

Otheraccess equipment

Digital Line Unit

SS7oIP

Signaling GatewaySIP-I

Management System

DLU DLU DLU IPIPIP

Multi-Service Access Node

H.248

H.248

H.248

MGCP

H.248/MGCP

POTS/ISDN xDSL


ITU-T

Highlights for Softswitch based PSTN Emulation

o Provides current PSTN/ISDN serviceswith an unchanged presentation (100% feature preservation) for all interfaces

o Services/features provided by call control of Softswitch

o H.248 control of Access Gatewayso Covered by existing ETSI TISPAN and ITU-T

standardso Emulation domain (softswitch) and IMS session

control are interworking via SIPo Possibility to re-use installed access equipments

(POTS, ISDN, PRI, CAS etc)o Protection of embedded subscriber base through

immediate migration


ITU-T

Migration Scenario – Class 4

Value proposition! Reduction of network elements to be managed ! Reduction of operational expenses (OPEX)! Efficient, simpler architecture based on IP

TDM Network

Carrier-grade IP

other PSTN other PSTN

Switch Switch

TX

TX TX

LX


ITU-T

Migration Scenario – Class 5

TDM Network

Carrier-grade IP

other PSTN other PSTN

SwitchSwitch

LX

DLU DLU DLU IPIPIP

Value proposition! Reduction of network elements to be managed ! Reduction of operational expenses (OPEX)! Grow on IP -> Future Proof solution ..! 100% preservation of Class 5 features


ITU-T

Applications

SIP

PSTN Emulation

Trunk MGW

SS7

PSTN/ISDN

PSTN

Narrowband Subscribers & Legacy Access EquipmentsPOTS, ISDN BRI, ISDN PRI

H.248

MGCF & AGCF

PBX

Access GW

Unified Messaging

Video MailMessaging ConferencingPush to Talk

IP Centrex

Voice Application Server

Voice and Video Telephony

Presence

PSTN Simulation Architecture

DLUDLUDLU

SIP

Broadband SubscribersxDSL, WiFi, GPRS, UMTS

CSCF

SIP

HSS

Diameter

IMS

PSTN Simulation


ITU-T

Highlights of PSTN Simulation based on IMS

o Focus on New Multimedia serviceso Advanced Multimedia services like push-to-talk,

video conferencing, IP centrex etco Converged services across different acccess

domains, eg: mobile networks, broadband wireline networks (xDSL, FTTH etc), WiFi

o Voice service is limited to simulation, with SIP based voice application server

o Most commonly used and popular voice services are simulated (eg: CLIP, Call Forwarding etc) –PSTN Simulation

o Interworking with PSTN Emulation domain via SIP


ITU-T

IMS is a key element in NGN network evolution

o IMS (IP Multimedia Subsystem) is the common control infrastructure for real-time and non-real-time end-to-end multimedia services and any mixture of those

o IMS is designed and standardized by 3GPP to integrate smoothly with existing mobile and fixed networks

o New and existing services (e.g. Presence, Location) and applications can be connected and controlled by IMS through the standardized ISC interface

o By using SIP (Session Initiation Protocol) IMS based services can be accessed from any IP/SIP capable device (UMTS, GPRS, WLAN, wireline users, etc. )


ITU-To No IMS: - repeated vertical integration

- no synergies!o With IMS: - one-time integration

Application 1 ... n

Specific Databaseper Application

Specific Billing

Specific Network Integration

Specific O&M

SpecificSession Control

Specific Databaseper Application

Specific Billing

Specific Network Integration

Specific Sign-onAuthentication

Specific O&M

SpecificSession Control

...

Application 1 ... n

Global User Database

One Billing

Common network Integration

Single Sign-onAuthentication

Common O&M

One MultimediaSession Control

IMS

...

Specific Sign-on Authentication

IMS allows efficient application integration


ITU-T

IMS as Service Delivery Platform – Mobile IP Centrex

o Hybrid Centrex Groups • SIP phones• GSM / UMTS phones

(2G, 2.5G & 3G)o Wide range of enterprise

features to all this device types under a single platform

o Common feature set to business group users connected via fixed IP phones/Softphones, mobile phones

IP Network

Media Gateway ControllerMobile Centrex

Server

SIP PhoneSoftPhone

UMTS

IP

PDA

GSM Terminal UMTS

Terminal

Mobile IP Centrex Group

PLMN

Gateways

Call Session Control Function


ITU-T

IMS as Service Delivery Platform – Video Call Applications

VIDEO TELEPHONY VIDEO PORTAL VIDEO MAIL VIDEO CONFERENCING

o Video Telephony is provided to SIP clients with interworking with 3G.

o Video portal enables SIP/3G users to stream video contents from portals

o Video Mail enables to access their recorded video mails, and also to record a videomessage to answer calls

o Video Conferencing enables users to establish video conferences with up to 16 participants per conference


ITU-T

IMS as Service Delivery Platform – One Number Service

o The Voice Application Server is used to provide call supplementary services for all IMS subscribers. The Mobility Management Application Server provides roaming between mobile network and IMS network

PSTN

SS7SS7

GSM/GPRS

HLR MSC/VLR

RAN

ISUPSIP (ISC)

MAP

CSCFSIP

SIP

MGW

MGCF

WiFi CPE DualModeHandset

SIP Phone Analogue Phone

VAS MM

HSS

GGSN/SGSN


ITU-T

Migration to NGN today for the benefits tomorrow

o Migration towards NGN with PSTN Emulation based on softswitch

• IP based, flatten, simplified network• 100 % preservation of TDM voice features

o Introduction of IMS as service delivery platform• Introduction of SIP based, revenue generating

applications to increase ARPU, eg: Mobile IP Centrex, Video call applications etc

• Fast, simple introduction of new services

o Provides attractive service bundling• Reduce churn rate with triple play services• One platform for video, voice and data

Defend

Attack

Exploit


ITU-T

“There has been a change of pace at KPN this year. We have put our innovation initiatives in high gear, and the roll out of our strategy to attack new revenue opportunities, defend our leading share for traditional services and exploit a structurally lowercost base is on track. We are delivering on our promises, with increased revenues and an improving margin ... With the launch of Consumer VoIP services we took the first steps in our migration to an all IP network, the future basis for all our services."Ad Scheepbouwer, CEO of KPN, August, 2005

"In the years ahead KPN and its customers will be entering an IP world in which communication is set to change fundamentally. … SIEMENS' strength in fixed and mobile networks was obviously extremely important to us.”Eelco Blok, KPN managing board member, December 2004

An innovative total package that offers unlimited calls in the weekend to all fixed lines in the Netherlands and unlimited ADSL (800Kbs) in one single subscription for € 34.95

In Q2 2005, KPN launched

'Internetplusbellen'

Powered by Siemens

Technology

The bundle price for this combined subscription costs less than two separate subscriptions for telephony and Internet.

The bundle price for this combined subscription costs less than two separate subscriptions for telephony and Internet.

Leadership of converging

communications market

Attack

Defend

Exploit The cornerstoneof KPN strategy

GO FOR VoIP

Case Study KPN, Netherlands Case study


ITU-T

Documents

Migration Scenarios to NGN - TT · Migration Scenarios to NGN ... Hanoi, Vietnam, 15-16 May 2006 9 ITU-T Migration Scenario – Class 5 TDM Network ... Eelco Blok, KPN managing board