Voice NGN Case Study

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Voice NGN

2008 Tata Communications Transformation Services, Ltd. All Rights Reserved.


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2Data as on May'08

Agenda

Background

Tata Communications NGN story

Shift towards NGN

ArchitectureChallenges

Approach

Implementation

Benefits

Conclusion

Take Away Slide

Glossary

Annexure


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Background

Evolution of NGN networks


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4Data as on May'08

Background

Evolving towards All IP Communications

Traditional Telecom networks

deployed separate networks

for Data & Voice

NGN: Single network transports

all information & services (voice,

data, video) by encapsulating all

of them into packets

No need for separate voice &

data networks

NGN technology is based on IPand MPLS at the core and SIP at

the application layer

Evolution of NGN networks An Overview


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5Data as on May'08

Background

Evolution of NGN networks:

Market Drivers Increasing demand for new

multimedia services

Increasing demand from businessesfor integrated data, voice and video

Increased competition betweenoperators due to deregulation ofmarkets

Explosion of digital traffic due

to the increasing use of Internet

Business Drivers Capex & Opex optimization

Higher revenue due to higher

addressable market

Ease of extending reach and capillarity

Newer revenue streams and business

models

Network Drivers Cutting edge technology

Network economics

Magnitude of traffic growth Effective network

management Scalability and faster rollout Ease of interconnect Higher network resilience

TheDrivers


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6Data as on May'08

Customer Premises

Core Switching Layer

Service Control Layer

Service Access Layer

Background

SCP (IN)

Class 5

Switch

Class 5

Switch

Class 4Switch

Class 4Switch

DLC DLC DLC DLC

Traditional Voice Networks

End users connect to aClass 5 switch (local

exchange) via a DLC

Switch routes the calleither within itself or to

next level of switch

IN takes care of subscriberaccount validation forprepaid subscribers

Underlying media is on OFC using SDH; and it is a circuit switched network


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7Data as on May'08

Service Access Layer

Service Control Layer

Background

Architecture Evolution

IP/MPLS

Customer Premises

Class 5Switch

Class 5Switch

STP

Application Layer

Class 5

Features

Conference Media Presence

Softswitch

IAD

IP/MPLS

MSANMG

NG-DLC

SBCHSS

CSCF

Set Top BoxCPE IADIP Phone

Normal telephone lines arereplaced with IADs, IP phones,Set-top boxes

These connect to a Softswitch(SS) via either a MediaGateway (MG)/ IAD/ NG-DLC

Softswitch can easily connect toother applications such asPresence, Conferencing etc onIP-MPLS backbone

Underlying media connectivity is on IP MPLS; and it is a packet switched network


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8Data as on May'08

Background

Breaks traditional hierarchy and advocatesflat architecture; much of the intelligence is

pushed out to edge of network

Reduced load on centralswitches

Transport Layer and Control Layer logically andphysically separated

Allows for services to bedeveloped independently fromunderlying connectivity

Open Interfaces based on API

Allows for creation & introductionof services seamlessly and quickly;Speeds up introduction of newservices

Packet switched technologySingle network to carry Voice,Data, Video and other applications

Traditional Architecture to NGN Architecture:

Derived benefitsChanges in Architecture


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Data as on May'08 Tata Communications

Voice NGN network

Shift towards NGN Architecture Challenges Approach Implementation Benefits Conclusion


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10Data as on May'08

Shift towards NGN

Tata Communications

decision to deploy

NGN for its Voice service

Traffic Volumes of the order of500Mn minutes per month

Traffic Volumes increasing atthe rate of approximately

5-11% per month

Increasing number of players in themarket

Need to cut down operational

costs to maximize profits


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11Data as on May'08

NGN Architecture |Overall proposed architecture design

NGN deployment proposed

to be carried out phase-wise

Softswitches planned to be

deployed at the following

locationsLos Angeles

New Jersey

New York

Canada

Hong KongIndia

India NGN taken up as first

phase of implementation

International NGN

deployment in planned stage

This case study focuseson India NGN story


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12Data as on May'08

NGN Architecture

India NGN Architecture

3 Softswitches and 3 SignalingGateways at Mumbai, Delhi and

Chennai

7 media gateways with built

in SG deployed at Mumbai,Delhi, Ahmedabad, Jallandhar,

Hyderabad, Bangalore & Kolkata

NMS system at Mumbai

& Chennai with geographic

redundancy

Vendor deployed is ZTE

Decided based on the currentand forecasted traffic profile& dispersion


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13Data as on May'08

BLR CHN JAL

DEL

MUM

AMD KOL

HYD

STM-1 Links

STM-4 Links

a) Dual Core Routersat all locations

b) Redundant WANConnectivity

between all POPsc) High Speed CORE

Routers C76XXRouters

d) Dedicated Network for Voice

e) All traffic onMPLS-VPN forenhanced Security

f) Core Addressedon Private IPs

NNI

NNI

NNI

Management Link. Dedicated and Redundant X-

Connects for Network Management Only NOC, FMS, NMS and EMSTraffic on the X-Connect No Voice

Traffic

NGN Architecture; Backbone Architecture

MPLS network for Voice NGN

Class of service (COS) implemented for separating signaling traffic from media


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14Data as on May'08

Challenges

Regulatory Partner Design Implementation Operational

VOIP

interconnectguidelines notclearlyformulated

Interconnection

issues Voice Qualityapprehensions

Interface issues

Architectureevaluationchallenges

BSS integrationissues

CNMS Integration

issues Design ofstatisticalreports &customizations

Stringent

timelines POI capacityaugmentation

Networkmigration issues

Integration of

statisticalreports &customizations

Traffic

Engineering PerformanceIssues

KnowledgeTransfer


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15Data as on May'08

Approach

Business Units &

Pre salesNetwork (Plng. & Ops.) Unit

Technology group

TechnologyEvaluation

Proof of Concept NW Architecture

Eqpt Planning BW Planning

Equipment/BW specs

VendorEvaluation

Vendor Order Execution Planning

Market Forces /

Vendor / Competition

NW ProjectsCommercial

Business Case /Project approval& NW economics

Projections

Technology Customized

requirements

Route Planning

Technology

Function

Structured end-to-end approach adopted; new service roll-out process followed

Well-defined workflow & functional interlinkages defined for facilitating smooth roll-out


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Implementation

Vendor Evaluation(Aug 06 March 07)

Installation &Commissioning(April 07 June 07)

Testing & Billingintegration

(July 07- Aug 07)

Equipment logistics

and distribution Equipment installation

8 locations handledparallely

Equipment

commissioning: 8locations handled

parallely Fastest ever NGN

implementation

1

Key Vendor Identification

Sending out RFI Design high level

architecture plan Releasing RFP Evaluation

POC/ Site visit BOM release

Placing equipment order Low level design

High level design

Lab set-up for testing

Tests for variouscapabilities carried out

Test resultsdocumented

Billing Integration

(1) CDR formatcompliance

(2) CDR generationtesting

(3) CDR storagetesting

Equipment Arrival

Key Evaluation Criteria

Architectural Adherence Protocol Adherence Adherence to Standards Interoperability Capabilities

Lawful Interception Operational Features

Billing Compliance Operational Capabilities

Commercials

Some of the

capabilities tested BHCA Support Call Flow, CLI & RoutingFeatures

Protocol Support Lawful Interception

Billing Interoperability

Network RFS

BandwidthProvisioning

( Sept 07)

Bandwidth

pre-provisionedfor smooth migration

of services Issuance ofprovisioning orders

Follow-ups andclosure of the above

Network Migration(Oct 07 onwards )

Hand over toOperations

Communication to

operators

Engg Doc for migrationreleased

Feasibility of portsand bandwidth

Connectivity b/w NGN& TDM switches

Workorder issuance &

program management Configuration & testing

CDR verification Commercial launch of

traffic

2 3 4 5

Concept to implementationexecuted in 15 months


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17Data as on May'08

Benefits

Cost Savings : Overall costs down by around 40 %

Port Savings1. Effective savings in cumulative processing/ BHCA requirement

2. Port utilization improved by 30-35% vis--vis traditional TDM network; corresponding port cost

factor reduced by around 25-30%

Bandwidth Savings1. Less bandwidth required to backhaul traffic on NGN network; approx 70% less bandwidth

required to backhaul traffic on NGN network vis--vis TDM network resulting in corresponding

cost savings2. Converged voice & data network on core optimizes bandwidth by atleast 20%

Network Operations Savings1. Lower number of switching elements2. Reduced operational staff and expenditure

3. Opex cost savings of around 1million USD till date


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Benefits

Network Benefits

Ease of operations1. Lower number of network elements for NMS2. Centralized monitoring

Higher Network resiliency1. Multihoming2. Lower downtimes


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Benefits

Network Benefits

Delhi

MUMBAI

HYDERABAD

CHENNAI

Jalandhar

KolkataAhmedabad

BAN

GALORE

Ambala

LucknowPatna

Guwahati

Bhopal

NagpurRaipur

Cuttack

ERNAKULAM COIMBATORE

Rajkot

Gurgaon

Jaipur

Delhi

MUMBAIHYDERABAD

CHENNAI

Jalandhar

KolkataAhmedabad

BANGALORE

ZTESoft

SwitchZTE

MediaGateway

Ambala

ERNAKULAM COIMBATORE

AlcatelSwitch

Jaipur

Alcatel

Lucent

Marconi

Before After

Network Optimization1. Number of switching elements reduced2. Number of platforms rationalized


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Take Away Slide

In today's expanding competitive landscape, service providers should start looking towards

NGN networks to achieve operational cost benefits and provide service differentiation to

attract and retain customers

TCTS Portfolio of expertise

1. First phase of national NGN deployment completed

2. End-to-end roll-out involving vendor evaluation,deployment,service migration

3. Team possesses requisite skill-sets and expertise of a large scale NGN deployment

4. Further plans to roll-out NGN on an international platform

5. Introduction of additional value-added services on NGN in future

Value Proposition for Carriers

1. Deliver end-to-end or any specific sub-function for NGN deployment

2. Smooth migration of services from existing network to NGN

3. Identify & launch new services on NGN

a. IP Centrexb. Voice VPN

c. Voice over Broadband

d. Multimedia Conferencing

e. Unified Messaging

f. Video on demand


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Glossary

NGN : Next Generation NetworksIP: Internet ProtocolMPLS : Multi Protocol Label switchingSIP : Session Initiation ProtocolPOTS: Plain Old Telephone serviceSDH: Synchronous Digital Hierarchy

OFC: Optical Fibre CableDLC: Digital Loop CarrierRLU: Remote Line UnitWLL: Wireless Local LoopSCP: Secure CopySTP: Signalling Transfer Point

SBC: Session Border ControllerIAD: Integrated Access DeviceMG: Media GatewayMSAN: Multiservice Access NodeSG: Signalling GatewayMGC: Media Gateway ControllerBHCA: Busy Hour Call AttemptsIN: Intelligent NetworksNMS: Network Management SystemVAS: Value Added Services

Documents

Voice NGN Case Study