Final 00000000

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PRESENTED TO : PRESENTED BY :

DR. AASIM ZAFAR Faizur Rahman

MR. IMSHAD A. KHAN 2008-BIT-51

GD-5427

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ENHANCED DATA RATES FOR

GSM EVOLUTIONEDGE stands for Enhanced Data rates for GSM

Evolution. EDGE is most talked about

technology in mobile communicationtechnologies in recent times and it turn out to bethe evolution of most widely used GSM

technology. EDGE technology facilitates betterdata transmission rates with improved spectrum

efficiency and the best part of EDGE is capabilityof supporting new applications and improvedmobile communication capabilities. EDGE can

also be known as extended version of GPRStherefore it is also called EGPRS.

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Contd

EDGE uses the same structure, as today'sGSM networks, which allows it to be overlaiddirectly onto an existing GSM network. Formany existing GSM/GPRS networks, EDGE isa simple software-upgrade.

Using EDGE, operators can handle threetimes more subscribers than GPRS, tripletheir data rate per subscriber, or add extracapacity to their voice communications.

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History

Dec 1998 - 3GPP was created in December 1998 by the signingof the "The 3rd Generation Partnership Project Agreement". The

latest 3GPP Scope and Objectives document has evolved from

this original Agreement.The scope was subsequently amended to

include the maintenance and development of the Global System

for Mobile communication (GSM) Technical Specifications andTechnical Reports including evolved radio access technologies

Jul 2003 - Also, in July 2003, a new data transmission service,

the GPRS mobile Internet was launched. The installation of thenew EDGE (³Enhanced Data Rates for Global Evolution´) high-

speed data network, initiated in October, made Chile the fourth

country worldwide and the first country in the Region that is

able to provide its clients with third generation (3G) services,

thus permitting the advancement of the provision of 3G services.

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Jan 2007 - It is a quad-band mobile phone that uses the GSM

standard, hence has international capability. It supports the Enhanced Data Rat es for GSM Evolution ( E DG E ) data technology.

Jun 2008 - subscribers worldwide by J une, 2008, which the

organization said is more than 86 percent of the world's cellular market. GSM was accelerated earlier this decade by Enhanced

Data r at es for GSM Evolution ( E DG E ) .

2010 - The world telecommunications market is expected to rise at

an 11 percent compound annual growth rate at the end of year 2010.The leading telecom companies are working on telecommunication

fields like broadband technologies, EDGE( Enhanced Data rates for

Global Evolution) technologies, LAN-WAN inter networking ,

optical ...

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EDGE ( E nhanced Data Rat es for GSM E volution)

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Global System for Mobile

Communication (GSM)

Developed to provide common 2nd-generationtechnology

200 million customers worldwide, almost 5 million in the

North America It uses subscriber identity module (SIM) in the form of

smart card.

Supports both data and image services based on ISDNmodel, with rates up to 9.6 kbps

Spectral allocation: 25 MHz for base transmission (935960 MHz), 25 MHz for mobile transmission (890915MHz)

7

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General Packet Radio Services

(GPRS) GPRS is one of the technologies to improve 2G

phones (second generation phones) to enablethem for transferring data at higher speed, GPRS

allows mobile phones to remain connected tonetwork and transfer requested or sent datainstantly

Improved 2G networks (GPRS) manages to

support few of applications like web browsing,emailing, video streaming, Multimedia messagingservice etc. therefore GPRS can also be said thatit is 2.5 generation technology.

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General Packet Radio Services(GPRS)

V/s

Enhanced Data rates for GSM Evolution (EDGE)

Enhanced Data rate for GSM Evolution (EDGE) 2.75Generation (G) is faster than the General Packet RadioService (GPRS) 2.5 G

GPRS's speed is limited to approximately 20 kb/s

whereas EDGE is about 60 kb/s.

GPRS was an older technology, and EDGE was a slightenhancement to it.

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GPRS Vs EDGE Contd.....

GPRS is unable to allow the service providers

and operators to have an access to extended

wireless data application which is otherwisepossible with the use of EDGE.

GPRS and EDGE both allows the use of

single communication channel amongmultiple users.

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How Does EDGE Works?

Edge work by improving the signaling

interface used to communicate over the radio

wave.

Typically edge enhance three time theperformance of GPRS achieving an data rate

80 to160 kbps per user with mobile terminals.

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EDGE Modulations

12

Scheme Modulation Maximum rate [kb/s/ts]

MCS-9 8PSK 59.2

MCS-8 54.4

MCS-7 44.8

MCS-6 29.6 / 27.2

MCS-5 22.4

MCS-4 GMSK 17.6

MCS-3 14.8 / 13.6

MCS-2 11.2

MCS-1 8.8

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Modulation Technique

Modulation standard for EDGE ² 8-Phase shift Keying (8PSK).

8PSK ² linear modulation technique ²three consecutive bits are mapped ontoone symbol.

The symbol rate remains the same but

each symbol represents 3 bits insteadof one. Total data rate increases by a factor of

three.

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Modulation Technique ( cont. )

Distance between different symbols isshorter using 8PSK.

Increases misinterpretation. Under poor radio conditions extra bits

will be added for error correcting.

Only under very poor conditions GMSKis more efficient.

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Transmission Techniques

The EDGE concept includes:-

1. Circuit-Switched mode

2. Packet-Switched mode

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Circuit-Switched

A physical path is obtained for and dedicated to a

single connection between two end-points in thenetwork for the duration of the connection.

Eg- Ordinary voice phone service is circuit-switched.

The phone company reserves a specific physical

path to the number being called for the duration ofthe call. During that time, no one else can use thephysical lines involved.

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Packet-switched

Small units of data, called, packets are routedthrough a network based on the destination addresscontained within each packet.

The same data path can be used by many users inthe network. This type of communication between

sender and receiver is known as connectionless(rather than dedicated).

Most traffic over the Internet uses packet switching.The Internet is basically a connectionless network

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Advantages of EDGE

Get access to Internet resources.

Receive and send E-Mail messages.

Download images, melodies, games and

video files from WAP sites.

Exchange MMS messages several times

faster than through GPRS.

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Advantages of EDGE Contd

Balanced Improved Bit Rate in all conditions.

No hardware and software change is requiredin GSM core network.

Supports download of various File types.

Handles three times traffic than GPRS.

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Disadvantages of EDGE

EDGE requires Base Station modification.

Extra mobile terminal is required.

Frequently referred to as 2.5/2.75 G.

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Conclusion

EDGE Technology has succeeded the

technology previously used in mobiles.

No risks of extra investments.

It support the same technology as GPRS butit has got higher data rates of more than 120

kbits/sec

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Final 00000000

Documents

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