WELCOME TO ALL

A SEMINAR PRESENTED BY

B.SUDHAKAR REDDYROLL NO:1011166

III SEM M.C.A

SEMINAR ONSEMINAR ON

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INTRODUCTION TO 3G AND Wi-Fi

HOW BOTH ARE SAME ?

HOW DO BOTH DIFFERS FROM ONE ANOTHER ?

ADVANTAGES OF 3G & Wi-Fi OVER ONE OTHER

IMPLICATIONS OF 3G & Wi-Fi IN INDUSTRIES & PUBLIC POLICY

CONCLUSION

REFERENCES

CONTENTS

INTRODUCTION TO 3G3G was launched commercially by “NTT

DoCoMo” in Japan branded FOMA in October 2001.

3G Defines the collection of “Third Generation” cellular technologies which are designed to allow mobile cellular operators to offer integrated data & voice services over cellular networks.

3G is meant for mobile service providers (M.S.P’s) only.

M.S.P generally use a licensed spectrum to provide network coverage.

M S P (Mobile Service Providers) use licensed spectrum to provide mobile telephone coverage.

Each mobile base station support users up to several Kms.

The First Mobile services were Analog.

Wireless mobile services has been telephony.

Upgraded 3G networks can support data rates from 384kbps to 2mbps.

Data rates : AMPS > 2G > 3G.

3G NETWORK ARCHITECTURE MODEL

INTRODUCTION TO Wi-Fi

Wi-Fi stands for “Wireless Fidelity”.

It is the popular name for wireless Ethernet 802.11b standards for WLANS.

Wi-Fi allows collection of PC’s, peripherals ( printers, access servers etc. ) to share sources.

INTRODUCTION TO Wi-Fi

Wi-Fi is used by over 700 millions people there are 750 ,000 hotspots around the world & about 800 millions of new Wi-Fi devices are releasing every year.

It is a popular name for wireless Ethernet.

Allows collection of pc’s & share resoure , storage devices.

It mostly used in universities ,companies etc.,

Base stations equipments are owned & operated by end-user communities.

Though each base stations covers small range, it is possible to provide contiguous coverage over wide areas by using multiple base stations.

Wi-Fi provides “Hotspots” for airport,

universities, net cafes etc.

Whereas now-a-days there is a growing movement of so called “Free Nets” where individuals and organizations are being provided with open access to subsidized Wi-Fi network.

3G & Wi-Fi : SIMILARITIESBoth are wireless technology.

Both facilitates mobility. vs

Both are access technologies.

Both offers broadband data services.

Both supports “always on” connectivity

Wi-Fi

HOW BOTH ARE DIFFERENT ?

3G3G Wi-FiWi-Fi 3G represents an

extension of mobile service provider model.

It provides speed from 384kbps to 2mbps.

It provides better support for private/secure communication.

Wi-Fi comes out of the data communication industry (LAN’s) that is a bi-product of computer industry.

It provides speed much more than 3G i.e. about 11mbps.

Here privacy is limited & communication gets less secured.

3G3G Wi-FiWi-Fi 3G is more developed as a business and service model than Wi-Fi.

It uses licensed spectrum which is expensive.

It is more developed with respect to the upstream supplier markets.

It uses unlicensed spectrum which is less expensive.

3G3G Wi-FiWi-FiIt supports a maximum bandwidth of 15-20 Mhz.

It operates within the frequency range of 200-3000 Hz.

Here the bandwidth is up to 22 Mhz.

In this case the operating frequency range is 2.4Ghz

Examples of Wi-Fi

Wireless Access point (WAP)

Wireless Routers

Examples of 3G

GPRS speeds up to 114 kbps.

EDGE reached up to 384 kbps.

WCDMA offered downlink speeds up to 1.92 mbps.

ADVANTAGE OF 3G OVER Wi-Fi It provides a larger coverage area as

compared to Wi- Fi.

3G provides more safe and secured communication than Wi-Fi.

3G provides un-interfered service from spectrums of other networks.

While traveling from place to place 3G becomes more acceptable than Wi-Fi.

ADVANTAGES OF Wi-Fi OVER 3G

Wi-Fi is cheaper in comparison to 3G technology.

It provides much faster speed as compared to 3G.

It is widespread and more commonly used than 3G.

IMPLICATIONS FOR INDUSTRIES & PUBLIC POLICY

A) Wi-Fi can be a good competition.

The success of Wi-Fi wireless local access alternative is likely to be good for local competition.

If both 3G and Wi-Fi survive, then the diversity of visible networking infrastructure strategies will be conductive to greater facilities-based competition.

Wi-Fi model depends on wire line infrastructure to connect to the Internet Backbone

B) Wi-Fi & 3G can compliment each other.

Each of the technology has distinct advantages over the other that would allow each to offer higher quality services under disparate.

3G and Wi-Fi networks provides the opportunity to offer both near coverage with good voice telephony support.

CONCLUSION This article offers a qualitative comparison of two wireless technologies that can be viewed simultaneously as substitute and / or complimentary paths for evolving to broad band wireless access. The two technologies are 3G , which is the preferred upgrade path for mobile providers , and Wi-Fi , one of the many WLAN technologies.

The goal of the analysis is to explore two divergent world views for the future of wireless access and to speculate on the likely success and possible interactions between the two technologies in the future.