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EEC-753

INDUSTRIAL TRAINING SEMINAR

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TELECOMMUNICATION NETWORK

OVERVIEW

BY:

RAJAT BHATIA

ECE IV YEAR, SEC. D

ROLL NO. 0802731085

UNDERTAKEN AT

BHARTI AIRTEL , GURGAON

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PRESENTATION OUTLINE

BHARTI GROUP OVERVIEW

INTRODUCTION TO ABTS

A TO Z OF TELECOMMUNICATION

INTRODUCTION TO EWSD

TRAFFIC MANAGEMENT

NETWORK MANAGEMENTCCR MANAGEMENT

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BHARTI GROUP OVERVIEW

Bharti Airtel is the flagship company of Bharti enterprises. The BhartiGroup has a diverse business portfolio and has created global brands inthe Telecommunication sector.

largest integrated and the first private telecom services provider with afootprint in all the 23 telecom circles and more than 62 million mobilesubscribers as of March 2008.

The company also provides telephone services and Internet access overDSL in 14 circles and complements its mobile, broadband & telephone

services with national and international long distance services.

Bharti as Bharti TeleVentures has also been preparing for an advanced IPnetwork by signing a ten year deal in 2004 with IBM for a managed servicedelivery platform in a deal that could be worth over US$750m.

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INTRODUCTION TO ABTS

First private basic telephone service provider in India.

Launched its fixed line services in 1998 in MP,

Subsequently started its operations in Haryana in 2001 and then in Delhi,

Karnataka and Tamil Nadu in the year 2002

On 1stSept05, the company celebrated its 1 million Subscribers strengthfor fixed line telephony.

Provides complete telephone services:

DSL

Leased line

ISDN

High end solutions to home users with VAS

ABTS has been divided into 3 hubs commonly known as CNOC NORTH,

SOUTH AND WEST.

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A TO Z OF TELECOMMUNICATION

WHAT IS TELECOMMUNICATION?

Any transmission, emission or reception of signs,

signals, writing, images and sounds or intelligence of

any nature by wire, radio, optical or otherelectromagnetic systems.

WHAT ARE ITS ELEMENTS?

TELECOMMUNICATION

ACCESS PARTCENTRALOFFICE

BACKBONEPART

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The access part

The portion of the telecom network which delivers the voice/datato the end subscriber can be termed as the access network

The central office

The portion of the telecom networks which switches or routes thevoice/data from one end to other end can be termed as centraloffice. It basically consists of switching unit called SWITCH.

The Backbone Part

It is basically the connectivity between two central offices. It canbe of the following types:

Open wire systems.

UHF/MW systems. Satellite based.

Cable based.

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TELECOMMUNICATION SERVICE

Service offered by a network or service provider to its customers in order

to satisfy a specific telecommunication requirement. Telecommunication

services are divided into two broad families: bearer services and

teleservice.

Bearer service

The bearer service is a type of telecommunication service that provides

the capability for the transmission of signals between access points.

Tele Service

The type of telecommunication service that provides the complete

capability, including terminal equipment functions, for communication.

Examples of a teleservice include speech, fax etc.

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SOME BASIC TELECOMMUNICATION

TERMS

CHARGING: CHARGEABLE EVENT

CALL DETAIL RECORD CDR

TRAFFIC

TRAFFIC CHANNEL-TCH

TS-TIMESLOT

ROUTING

ISDN-Integrated Service Digital Network

PRI-Primary Rate Interface

BRI-Basic Rate Interface

DTMF-Dual Tone Multi Frequency

PCM-Pulse Code Modulation

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ELECTRONIC WORLDWIDE SWITCHINGDEVICE

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One of the most successful digital switching system

worldwide

All with a single system.

All in one switch.

The Siemens EWSD Switching System is built on aflexible architecture. Modular hardware design allowsnetwork switching elements to be reconfigured and line

port functions to be redefined. Multiple processors areable to add virtually unlimited power for call processing,management of network functions and service creation.

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EWSD H/W

1 2 3 4 5Racks

01

02

03

M

UT

Rack Rows

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Frame

001 007 013 019 025 031 037 043 049

M

o

du

l

e

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What does Rack Pos No. 110102 means

??

Digits 1-2 : Room Number

Digits 3-4 : Rack Row NumberDigits 5-6 : Rack Number

So, 110102 means. Room no. 11 , rack rowno. 01 and rack no. 02

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SWITCHING

CONTROL

SIGNALLING

ACCESS

F i l Bl k Di f EWSD

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Functional Block Diag

Functional Block Diagram of EWSD.

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Power Supply - (-48 V) D.C

Air Conditioning 18 < 22 degree

Humidity - 35 < 65 degree

Fire Fighting Equipment

Exchange Earth < 0.5 Ohms

INFRASTRUCTURE OF EWSD

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EWSD PERIPHERY COMPONENTS

REMOTE SWITCHING UNIT (RSU)

The remote switching unit is one of thehighlights of EWSD

When streamlining your existing network ordesigning new networks, RSUs can function assmall network nodes

Provides the network operators with a varied

flexible and economical solution. Up to 50000 subscribers can be connected to

one RSU.

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RSU Benefits:

Reduced number of switches and therefore

reduced OA&M costs.Less transmission capacity required between

remote units and host exchange.

Faster feature introduction because of reducednumber of exchanges.

Possibility of cascading additional remote DLUs

Standalone operation including charging

Internet offload

Part of next generation network migration path.

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LINE TRUNK GROUP (LTG)

The Line Trunk forms the interface to the switching network for thesubscriber and the trunk connections. In addition, it performs functions

such as receiving dialing information, producing call records , line

supervision and echo cancellation.

The latest type of LTG offers the following advantages: Footprint reduction by 60% 50% less power consumption 1.5 times higher performance Optical or electrical interface to the switching network.

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DIGITAL LINE UNIT

With the newest Digital Line Unit, the EWSD platform is perfectly

prepared for the future. It offers top performance and significant cost

savings for the network operator.

DLU benefits:

Future proof: able to handle increasing traffic50% less space per subscriber line30% less power consumptionPart of next generation network migration path.

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TRAFFICThe unit of traffic is Erlang.

Erlang is a measure of the time for which a particular circuit is busy continuously.

For duration of 1 hour, if the circuit is busy for complete one hour, we call it 1Erlang.

If there are N circuits, then the maximum traffic will be N Erlang , which means

all circuits busy for the complete duration of the observation period.

AIMS OF TRAFFIC MANAGEMENTAnalysis of traffic management helps:

Network Planning and Traffic Forecast

Planning of new networks and expansion of existing networks

Reveals extreme load situations

Optimum ratio of investment to yield

Network Traffic Management

Detects overload situation

Helps in defining overflow on alternate routes

Detects fault in the network.

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TRAFFIC MONITORING

Networks are subject to considerable traffic fluctuations.Traffic monitoring helps in detecting traffic bottlenecksand overload situations.Following objects can be put under monitoring: Trunk groups(TGRP) Coordination processor

TRAFFIC REDUCTION AND CONGESTION CONTROL

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TRAFFIC REDUCTION AND CONGESTION CONTROL

CALL BLOCKING POINTS (CBPT)It involves-Code blockingCall gappingLeaky bucketCrank backENHACING NETWORK CAPACITYThere are some features that enhance the network capacity:ODR (optimised dynamic routing)HTRC (Hard to reach control)MCC (mass call control)

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NETWORK MANAGEMENT

Traffic measurement helps in network management.It aims at-Ensuring optimum usage of network resources even during periods of highload.Also aims at providing the subscribers with the highest possible level of

connection qualityIt involves

Reducing volume of traffic to a destinationRoute the traffic to alternate paths during congestionBlock the traffic.It results in-

protection of the network against the unsuccessful traffic and thus saves

revenue.

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It is the ratio of number of successful calls to number of call attempts.

It is a measure of network stability and more importantly REVENUE

GENERATION.The reasons of call failure may be due to:-Network reasonsSubscriber reasons.

METHODS OF CCR MANAGEMENT

A city is divided into number of smaller regions.Periodic record of CCR is maintained for each regionA series of graphs shows the increase or decrease in the CCR of different areas.If a dip is observed in the graphs of any particular region, ICTST is used tomonitor the incoming or outgoing calls from a particular region.This helps in detecting the reason for failure of the unsuccessful calls

CCR (Call Completion Rate)

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THE HOUSE IS OPEN FOR

QUESTIONS

???