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7/30/2019 Dipen Final

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Older than

invention of mobile

phone(April 1973)

Was developed

during or on basis

during world-war I

First time used in

Germany

Between Berlin to

Zossen in military

trains in 1918

Public trials

between Berlin to

Hamburg in 1924


2/20

0 signifies invention of the technology

Mobile Radio Telephone System


3/20

Types Of 0G:

O G

PPT MTS IMTS OLT


4/20

PPT(Push To Talk)

Also known as

Press To

Transmit

Half Duplex

communicationOnly one person

can talk at a

time and other

should hear

Example :

Conversationbetween aero

plane pilot and

traffic controller

at airport


5/20

MTS(Mobile Radio Telephone

System)

Used in

1946

Transceivers

are used

Whole area

is dividedinto sections

and each

section had

a base

station

Every

section had

its own

frequency

Due to very

large sizeMTS phone

were

installed in

trains or in

vehicles


6/20

IMTS(Improved mobile

telephone system)

Progression

of MTS

Installation

of high

powered

transmitter

to cover

large range

Same

frequency

was used(so

base

stations

were to be

located

distantly toavoid

interference)

Full duplex

system

Voice/soundcan be

transmitted

and received

at both ends

simultaneou

sly.

No need to

contact

telephone

operator for

calling


7/20

OLT

Offentlig Landmobile Telefoni or Public Land Mobile

Telephony

Developed by Teverket(Norway)

in 1966

It supported both half way and

full way duplex system


8/20

1st generation system

Also known as AdvancedMobile Phone System(AMPS)

Based on analogue cellular

system

Introduced in 1978 in USA

Played vital role of moving

mass to use mobile phones

Only voice calling was

possible

1G


9/20

2G:

2nd generation mobilenetwork system

Introduced in 90s

Digital Cellular System

FAX, SMS and emailservices were introduced.

Being digital in nature, it

was difficult to eavesdrop

2G proved to be a leap

forward (especially in India)

2G


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Semi Global Roaming System

Connectivity all over the world

In spite of being superseded by other

technologies like 3G and 4G, etc.; it

is most used widely

It divided in 2 typesTDMA

CDMA

GSM (TDMA type) is used by almost

80% total subscribers

CDMA is used by almost by 17% of

them.


11/20

Short lived mobile technologies

between 2G and 3G2.5G

introduction of GPRS

Serious improvements like

packet switching, WAP, MMS,etc.

2.75G

Also called as EDGE (Enhanced

Data Rates for GSM Evolution)

Considerable increase in data

speeds

2.5G

&

2.75G


12/20

3rd generation

Main idea was

standardization of

mobile network

technology across theglobe

Under IMT-2000

supports both circuit

switched and packet

data systems

3G


13/20

Very high spectrum efficiency

In both GSM and CDMA

Data speeds up to 2Mbps

Advantages like

Alternate billing

methods(pay-per-bit, pay

per-session, flat rate,

symmetric bandwidth)


14/20

4th generation mobile

network system

Descendent of 3G standards

Ultra broadband

Substitute for DSL and cable

network

Speed up to 20

Mbps(currently)

Can reach up to 1 Gbps

4G


15/20

Supports IP based system IP

protocol. Two technologies of 4G:

Mobile WiMax2

LTE advanced

Applications: 3D conferencing

ePayment

Two Major technologies:

WiMax2 LTE advanced


16/20

WiMax2 :

Up to 30 to 40 Mbps and

1Gbps at selected locations

Introduced in South Korea

in 2006 in 2nd quarter

By end of 2008, it had 350million subscribers

By end of 2011, it had more

than 1 billion subscribers

WiMax2


17/20

Introduced in

Moscow, Russia inOctober 2012

Developed by

Yota(Russia)

LTE

Advanced


18/20


19/20


20/20

Investment in spectrum

Capital Expenditure

Operational Expenses

Out of reach of masses

Security issues

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