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NNEXT EXT

GGENERATION ENERATION

NNETWORKETWORK

2

Next-G networks: DefinitionsNext-G networks: Definitions

• Realization of Convergence of the telecommunication networks

• Using Distributed Control Architecture instead of Traditional common control architecture

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Traditional NetworksCL5 Switch

PSTN

CL5 Switch CL4 Switch C4 Switch

SS7 Network

Corp PBX

PRI

IMT IMT

MSC PSTNCL5 Switch

CL5 Switch

• Traditional Networks: Separated Networks– Distinct services: voice, mobile, data– Different equipment for different services– Different regulations

ISPInternetISP

ISP RAS ISP RAS

Separated Networks

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Traditional NetworksSeparated Networks

DLC

Central Office Switch

PSTN

Access Switch

Point of Presence

PSPDN

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

network• PSPDN uses a packet-switched network to carry data

– Open interfaces, flexible bandwidth, lower costs, intelligence is in CPE

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Traditional Networks

• This situation is expensive and inefficient:– Many solutions are proprietary– Many resources are duplicated and cannot be

shared– Separate management system for each network

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

Problems

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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

7

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

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Convergence NetworkCorporate 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 switched telephone network (PSTN) and the public switched packet data network (PSPDN), creating a single multi-service network. This is called convergence

Definition

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Convergence

• To fill the missing link between voice & data networks, you need wire-speed, cost efficient mediation devices at the junction points of networks, controlled by centralized intelligence 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

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Distributed Control Architecture

• Old Architecture:

– Larger

– Centralized (common)

– Expensive

– Proprietary

Intelligence

ATMTDMIP

Intelligence

• New Architecture:

– Smaller

– Distributed

– Cheaper

– Open

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Distributed Control ArchitectureCommon Control ArchitectureCommon Control Architecture

ATMTDMIP

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

launch application/services– Long application development

time

– More applications, more revenues– Service creation at network edge,

close to the customer– Lower cost, faster application

development

Open Distributed ArchitectureOpen Distributed Architecture

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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

ITU

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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. Softswitch

• Flexible distribution of switching functionality • Interoperability among functional elements• Carrier selection of best-in-class components• Rapid 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

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Next-G Switch: General Characteristics

• Extreme Scalability

• Service Creation Environment

• Remote Management and Diagnostics

• High Availability

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Extreme Scalability

• Hardware & software scales to meet the demands of any network deployment– Purchase only the capacity that the network

requires– For additional capacity, insert additional cards

Card Level

System Level

Network Level

SNMP

Card Level

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Service Creation Environment

• Allow carriers to develop, deploy and pay only for the services that their customers require– No longer need to wait for

a vendor’s next release of feature software

• Gives a competitive advantage to the carrier– Competitors may not be able to offer the same

service

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Remote Management & Diagnostics

• Connect a distributed network of intelligent switches together and manage them as a single virtual switch

• Graphical User Interface (GUI) for easier management

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Highest Availability

• Hot-swappable, fault-tolerant system– Switch does not have to be brought

down for hardware upgrades– New software can be uploaded and

activated while the switch is in service

• Zero downtime

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Vendor Solutions: Siemens

SURPASSSURPASS

Packet-Switched Network

Circuit-Switched Network

SwitchRemoteSwitch

RemoteSwitch

Residential Small-Medium Enterprise

...

...

NetManager

SURPASS hiG

SURPASS hiA

SURPASS hiQ

Residential

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Vendor Solutions: ZTE

34

Vendor Solutions: Huawei

iNET - Huawei NGN Solution

Softswitch

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Vendor Solutions: Alcatel

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Vendor Solutions: Ericsson

Q.BICC

H.248 H.248

CORE SWITCH

AXD301

AXD301AXD301

MEDIA GATEWAY

MEDIA GATEWAY

ACCESSNODE

LOCALEXCHANGE

ACCESSNODE

PBX

LOCALEXCHANGE

PBX

Telephony Server

Telephony Server

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SummarySummary

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

• Rather than large, centralized, proprietary switch infrastructures, this next-generation architecture pushes central-office (CO) functionality to the edge of the network.

• The result is a distributed network infrastructure that leverages new, open technologies to reduce the cost of market entry dramatically, increase flexibility, and accommodate both circuit-switched voice and packet-switched data.