MATERI KULIAH MATERI KULIAH 6 6

SP 2005 SP 2005 PENJASTELPENJASTEL

Next Generation Next Generation NetworksNetworks( NGN )( NGN )

Adapted from PT. INTI internal Adapted from PT. INTI internal documents for teaching purposes documents for teaching purposes

Next-G networks: DefinitionsNext-G networks: Definitions

Realization of Realization of ConvergenceConvergence of the of the telecommunication networkstelecommunication networks

Using Using Distributed Control ArchitectureDistributed Control Architecture instead of Traditional common control instead of Traditional common control architecturearchitecture

Traditional NetworksTraditional Networks

CL5 Switch

PSTN

CL5 Switch CL4 Switch C4 Switch

SS7 Network

Corp PBX

PRI

IMT IMT

MSC PSTNCL5 Switch

CL5 Switch

Traditional Networks: Traditional Networks: Separated NetworksSeparated Networks– Distinct services: voice, mobile, dataDistinct services: voice, mobile, data– Different equipment for different servicesDifferent equipment for different services– Different regulationsDifferent regulations

ISPInternetISP

ISP RAS ISP RAS

Separated Networks

Traditional NetworksTraditional NetworksSeparated Networks

DLC

Central Office Switch

PSTNPSTN

Access Switch

Point of Presence

PSPDNPSPDN

PSTN uses a circuit-switched network to carry voicePSTN uses a circuit-switched network to carry voice– Proven, reliable, QoS, feature rich, intelligence is in networkProven, reliable, QoS, feature rich, intelligence is in network

PSPDN uses a packet-switched network to carry dataPSPDN uses a packet-switched network to carry data– Open interfaces, flexible bandwidth, lower costs, intelligence Open interfaces, flexible bandwidth, lower costs, intelligence

is in CPEis in CPE

Traditional NetworksTraditional Networks

This situation is This situation is expensiveexpensive and and inefficientinefficient::– Many solutions are proprietaryMany solutions are proprietary

– Many resources are duplicated and cannot be sharedMany resources are duplicated and cannot be shared

– Separate management system for each networkSeparate management system for each network

The future belongs to data networks but the The future belongs to data networks but the money is in voice! The Data Network expands, money is in voice! The Data Network expands, but voice is still the main revenue-generatorbut voice is still the main revenue-generator

Problems

Data: Superior “Traffic Volume”Data: Superior “Traffic Volume”

0

50000

100000

150000

1990 1995 2000 2005 2010 2015 2020

Data network traffic PSTN traffic

Total Average Bit rate (Gbit/s)

Source: Siemens

Voice: Key “Revenue Generator”Voice: Key “Revenue Generator”

Operator Revenues (billion DM )

1993 1998 2003

976

244

1002

334

994

406

Non-Voice

Voice

29 %25 %20 %

Source: Siemens

Convergence NetworkConvergence Network

Corporate Network

PSTN

ATM Core

Internet

Convergence Switch

Convergence Switch

PRI

End Office Switch

IMT

PRI

Corp PBX

IMT

ATMISP RAS

IAD

End Office Switch

The next-generation network seamlessly blends the public The next-generation network seamlessly blends the public switched telephone network (PSTN) and the public switched telephone network (PSTN) and the public switched packet data network (PSPDN), creating a single switched packet data network (PSPDN), creating a single multi-service network. This is called multi-service network. This is called convergenceconvergence

Definition

ConvergenceConvergence

To fill the missing link between voice & data networks, you To fill the missing link between voice & data networks, you need wirespeed, cost efficient mediation devices at the need wirespeed, cost efficient mediation devices at the junction points of networks, controlled by centralized junction points of networks, controlled by centralized intelligence of a powerful call and feature serverintelligence of a powerful call and feature server

Missing Link

Data Networks

Voice Networks

...

SwitchSwitch

Switch

Intelligence is in network

Intelligence is in CPE

Proven

Reliable

QoS

Feature Rich

Multimedia Service Platform

OpenI I/F

Flexible bandwidth

Lower costs

Distributed Control ArchitectureDistributed Control Architecture

Old Architecture:Old Architecture:

– LargerLarger

– Centralized (common)Centralized (common)

– ExpensiveExpensive

– ProprietaryProprietary

Intelligence

ATMTDMIP

Intelligence

New Architecture:New Architecture:– Smaller Smaller – DistributedDistributed– CheaperCheaper– OpenOpen

Distributed Control ArchitectureDistributed Control Architecture

Common Control Architecture

ATMTDMIP

– Proprietary H/W and S/WProprietary H/W and S/W– Wait for generic S/W release to Wait for generic S/W release to

launch application/serviceslaunch application/services– Long application development timeLong application development time

– More applications, more revenuesMore applications, more revenues

– Service creation at network edge, Service creation at network edge, close to the customerclose to the customer

– Lower cost, faster application Lower cost, faster application developmentdevelopment

Open Distributed Architecture

ITU Layer Model of Next-G NetworkITU Layer Model of Next-G Network

Access GW

Mobile

Packet Network IP or IP over ATM

Phone WAP CATV AN PSTN Voice-data Int access

Core Network GW (SS7 Network)

Gateway

Call ServerCall Server

Central Service ServerCentral Service Server

App ServerApp Server

OSSOSS

Control Signal to SS7 GW

Softswitch

APIs for 3rd party app development

Control Signal to Internet GW

Interconnect GW to the Internet

CATV Fixed

Acc

ess

Lay

erS

ervi

ce &

Co

ntr

ol

Lay

er

Tra

nsp

ort

&

Co

nn

ecti

vity

L

ayer

PROPRIETARY

Circuit-Switched

TransportHardware

Call Control & Switching

Services & Applications

Soft-Switched

Transport Hardware

Softswitch Call Control

Services, Applications & Features (Management, Provisioning and

Back Office)

Open Protocols APIs

Open Protocols APIs

Circuit-switch vs. SoftswitchCircuit-switch vs. Softswitch

Flexible distribution of switching functionality Flexible distribution of switching functionality Interoperability among functional elementsInteroperability among functional elements Carrier selection of best-in-class componentsCarrier selection of best-in-class components Rapid introduction of innovative new servicesRapid introduction of innovative new services

Softswitch Objectives

The Softswitch will play a strategic role in the next-generation public network infrastructure for voice, video and data communications