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International Telecommunication Union Workshop on Next Generation Networks: What, When & How? Geneva, 9-10 July 2003 NGN Drivers: NGN Drivers: Acces Acces s and s and core core Networks, Networks, legacy legacy services migration services migration issues; issues; Dr. Sathya Rao Telscom Consulting [email protected]

NGN Drivers: Acces s and core Networks, legacy services migration issues;

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NGN Drivers: Acces s and core Networks, legacy services migration issues;. Dr. Sathya Rao Telscom Consulting [email protected]. An initiative to develop the NGN Roadmap. The Network Evolution. New Generation Communications. Wireline. Full Services IP Internet. Gateways. Telephone - PowerPoint PPT Presentation

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Page 1: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

International Telecommunication Union

Workshop on Next Generation Networks: What, When & How?Geneva, 9-10 July 2003

NGN Drivers: NGN Drivers: AccesAccess ands and core core Networks, Networks, legacy legacy services migration services migration issues;issues;Dr. Sathya Rao

Telscom [email protected]

Page 2: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

29-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

An initiative to develop theNGN Roadmap

Page 3: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

39-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

The Network Evolution

Gateways

Wireline

Wireless TelephoneSystem

Workstation

Full Services IP Internet

Workstation

Evolving Internet Communications

New Generation Communications

Page 4: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

49-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Key Technologies

IP

Access

Core

Services

Page 5: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

59-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

NGN CONCEPT

IP backbone

GlobalInternet

DHCP WAP

Operator’sServer Farm

BillingSIP

Proxy Server

ISP Server Farm

VHEAAA

ADSL

SGSNGGSN

GatewayRouter

MobileRouter

WLAN AccessRouter

IP backbone

Page 6: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

69-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Broadband (Access) for AllBroadband (Access) for All

Some obvious limitation to overcome: Access Crunch

TheThe”First Km"”First Km"

bottle-bottle-neckneck

Tremendous risein data transmission

capabilities

Tremendous risein data transmission

capabilities

Enormous increase inability to generate andprocess information

Enormous increase inability to generate andprocess information

Fiber OpticsFiber OpticsDoubling every 9 monthsDoubling every 9 months

"Moore's Law""Moore's Law"Doubling every 18 monthsDoubling every 18 months

NetworkNetworkCapacityCapacity

AccessAccessSpeedsSpeeds

ProcessorProcessorPerformancePerformance

Number ofNumber ofTransistors inTransistors inIntel's LatestIntel's Latest

Computer ChipComputer Chip

1

10

100

1.000

10.000

100.000

1980 1985 1990 1995 2000

1

10

100

1.000

10.000

100.000

1.000.000

10.000.000

1980 1985 1990 1995 2000

10.000

100.000

1.000.000

10.000.000

100.000.000

1980 1985 1990 1995 2000

2.4 kbps

19.2 kbps

56 kbps

2 Mbps

155 Mbps

2,400 Mbps

5,500,000

134,000

MbpsMbps kbpskbps

1,200,000

3,100,000

28,000,0001,200,000 Mbps

512 kbps

7,500,000

Page 7: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

79-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Global 2005 Broadband Access Market Forecast

Source: the Yankee Group

DSLCableSatelliteFWAOther

44%

39%

3%

2% 12%

BFWA

Page 8: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

89-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Broadband AccessBroadband Access TechnologiesTechnologies

100%

2000 2005 2010

POTS + ISDNDSL

Cable(coaxial, HFC)

Optical Fibre

Satellite, FWA

0%

Page 9: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

99-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

xDSL Technologies

Name Meaning Data Rate Mode Applications

DSL Digital SubscriberLine

160 Kbps Duplex ISDN Service,Voice and datacomm.

HDSL High data rateDigital SubscriberLine

.544, 2.048 Mbps Duplex T1/E1, LAN access,server access

SDSL Single line DigitalSubscriber Line

1.544, 2.048 Mbps Duple Same as HDSL pluspremises access forsymmetric services

ADSL Assymetric DigitalSubscriber Line

1.5 to 9 Mbps16 to 640 Kbps

DownlinkUpstream

Internet access,VoD, interactivemultimedia

VDSL Very high data rateDigital SubscriberLine

13 to 52 Mbps1.5 to 2.3 Mbps

DownlinkUpstream

Same as ADSL plusHDTV

Page 10: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

109-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Ethernet Access Network

o Why Ethernet in the last mile• Network designers can build networks with IP

and Ethernet and avoid the cost and complexity of protocol conversion

• Ethernet supports all services (data, voice and video) and all media types copper & fiber

o Standardisation in IEEE 802.3• Point to multipoint on optical fiber• point to point on optical fiber• point to point on copper

Page 11: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

119-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Wireless Access Technologies

Range [m]

Global

1000

100

10Data Rate [Mbps]0.1 1 10 16 100

MobileTelecomunicationNetworks

Wireless Office Networks

Wireless Device Connections

IEEE 802.15.x (PAN)HomeRF 802.11x (WLAN)HiperLANGSMGPRSEDGEUMTS

Page 12: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

129-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-TWLAN, a disruptive technology ?

Source : AnalysysUS Market Forecast 2002-2007US Market Forecast 2002-2007

Page 13: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

9-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

FixedData

MobileVoice

Mobility with

NetworkConnectivity

(Data + Voice)

Past Paradigms

Present Demand

“3G” WCDMALicensed Bands

WLANUnlicensed Bands

• Personal mobility• High data rate• Incremental infrastructure• Start 1998

• Full mobility• Modest data rate• All new infrastructure• Start 2002

Local Area- On campus- At home

Wide Area- On the road

Future Solutions

Wireless IP Networking Revolution

Page 14: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

149-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

The Future Network

IPv6

• Different types of network infrastructures are linked through common protocol

• All communication will be based on packets running on circuit, packet and wireless networks

• There will be convergence at service level to reach any one from anywhere at any time

Page 15: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

159-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Broadband Networks & ServicesBroadband Networks & Services

Optical FibreBackboneNetwork

Content Tools

Content Communication

Application

WirelessAccess

WirelineAccess

CableAccess

MediaGateways

Personal Area

Applications & Services

In the HomeOn the Move

Page 16: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

169-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Wireless Dream towards reality

o Deployment of WLAN in hot spot areas

• Big ISPs have invested in WLAN • Major vendor communities support: Cisco, Intel, Nokia..

o Wireless IP solutions have lots of momentum!• People desire wireless IP terminals and access devices

o WLAN offers a good mobile solution for indoor IP access

• Added value for the user - Flexibility, user mobility• Added value for ISP - solution for public high IP access

o WLAN standards are converging - IEEE 802.11b and IEEE802.11a

• Interoperability and roaming issues are being seriously worked out

Page 17: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

179-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

3G & WLAN integration

3G/GPRSRAN

SGSN

BTS

WLANRAN

WLANAP

Access Router

Gateway"WLAN GGSN"

3G/"HLR"

GGSN

Internet

Multimode terminalwith 3G user identity

Summary of features:- Integrated authentication and billing- WLAN security and mobility with IP terms- AAA work is a must!!!

Page 18: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

189-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Optical Transport Network Architecture

Page 19: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

199-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

NG Metro/Access Network Structure

BS

BS

BS

PS

VDSL

PassiveSplitter Access NetworkAccess Network

(D)WDM, IP/MPLS

(E)PON

FTTB

DSL

UMTSPico/Micro

Cells

UMTSMacro Cells

• Private customers and SOHOS

• High density housing estates with large dwelling houses

• Private customers and SOHOS

• Low density housing estates with small (single family) houses

FTTC

Point-to-Point Link

Metro NetworkMetro Network

DWDMIP/MPLS, MPS

10/40Gbps/ring / meshed

Global / WANGlobal / WAN10/40Gbps/

meshed

10Gbps/ downstreamup to 2.5 Gbps/ upstream ONT

ONT

BSONT

BSONT

10 Gigabit Ethernet

Public AreaWLAN (IEEE 802.11x) WLAN/UMTS RoamingWLAN/UMTS Roaming

Large business, Large business, EnterprisesEnterprises

CustomerCustomerPremisesPremises

Page 20: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

209-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Network Providers require:

- plan-able networks

- networks that are easy to manage

- to offer their resources to as many service providers as possible

- return on investment

- convergence (where realistic) in order to maximise efficiency and minimise costs

The Evolution of the Core and Access Networks

Page 21: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

219-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

CPN: Trend towards high speed wireless (over a short distance)

Access: Trend towards GPRS/UMTS (high-speed ?)/ WLAN for “hot-spots”, xDSL, Cable, PON/FTTH/FTTC

Core: Optical (Trend towards higher DWDM)

Trends in Network Evolution

Page 22: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

229-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

CPN: The ubiquity of IP applications has driven the biggest change ever seen in telecommunications networks

Access: An encapsulation of the IP packets is generally made in the access network. IP must be modified for wireless usage

Core: Core networks are essentially containers carrying bits. The overhead (time and loss of capacity) for encapsulation is insignificant

Trends in Network Evolution (network layer)

Page 23: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

239-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-TProblems of Convergence

- Diversity of user requirements (mobility, high bandwidth, real- time response, security, low cost …)

- Diversity of service requirements. This leads to the fact that certain network topologies and protocols are more efficient than others.

-Diversity of network capabilities

- Market forces and proprietory solutions matching the requirements.

Efficient interoperability is key.Network layer (IP) convergence is the only visible solution

The Evolution of the Core and Access Networks

Page 24: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

249-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Strong trend towards the use of IP as the converged network protocol in the home, access network and backbone. A common protocol for conveying the data from the source to the destination brings (in theory) economies in terms of the network devices, management and maintenance.

The Evolution of the Core and Access Networks

Page 25: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

259-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Technology Development

Some of the key technologies for NGNs would have to include: - middleware and distributed systems (to enable Service Provider - Network Provider separation)

- IP: IPv6, broadband, QoS, security, mobile and wireless

- multi-domain network management (for seamless roaming and QoS support)

- seamless interworking between core and access networks

- micro and opto-electronics

- cross-media content

- multi-modal and adaptive interfaces

- multi-lingual dialogue mode

- embedded intelligence

Page 26: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

269-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T- facilities for (mobile) transitioning between networks owned by different providers mid-session (and the corresponding charging issue)

- QoS may be demanded from the network or, alternatively, accounted for by (adaptive) applications

- QoS parameters have to be agreed between Network Providers

- the same service used on a different terminal, or transmitted over a different access network, will require different QoS values

- QoS on IP has been a research topic for several years. The solution usually proposed in the literature is the use of Intserv in the access network and Diffserv or MPLS in the core. However, the deployment of Intserv is difficult, since existing Internet applications are not QoS aware and do not have signalling capability.

Technology Development

Page 27: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

279-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Simplified NGN Architecture

SOFTSWITCH

Transport Layer

Man

ag

emen

t

SS7 ISDN H.323 SIP MGCP

Call Control & MGC

Policy Based Routing

Features &Services

BillingInterface

AAAInterface

Control

QoSController

QoSRouting

PolicyInterpreter

NetworkDB

cNAPScNAPS

RTPForwarding

QoSMeasurement

Virtual ChannelsControl

SLAVerification

MediaGateways

MediaServers

IP End Points

Application Layer Operations & Business Support Systems

MEGACO

DB

SLAManagement

App. ServersInterface

Page 28: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

289-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

Multi-Service Softswitch…delivering multiple services using a

Feature Rich Edge

Page 29: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

299-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

NGN Features & Benefits

o Features• Multiple applications and media types• Enhanced connectivity, accessibility and

availability

o Benefits• Increase revenue opportunities through

new services and products• Significant Reduction of operational costs

Page 30: NGN Drivers:  Acces s and  core  Networks,  legacy services migration issues;

309-10 July 2003 Workshop on Next Generation Networks: What, When & How?

ITU-T

NGN: Conclusions

o The NGN will deliver new ways of communicating that most can’t conceive of today

o The NGN is not about rate arbitrageo IP will rule from network core to the desktopo The value of the NGN grows exponentially in

relation to the number of applications it supportso The NGN is by nature globalo The NGN is the integration of communications

with IT and lifestyleo The transformation of the NGN is already

occurring - don’t miss the boat