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3G VS. WIFI

PRESENTED BY ANSIL.A APPLIED ELECTRONICS ROLL NO:9

CONTENTSIntroduction3G WiFiHow are 3G and WiFi sameHow are 3G and WiFi DifferentSome implications for industry structure & public policyConclusions

Introduction

3G refers to the collection of third generation cellular technologies that are designed to allow mobile cellular operators to offer integrated data and voice services over cellular networks.

WIFI refers to the 802.11b wireless Ethernet standard that was designed to support wireless LANs .

Two technology reflect fundamentally

The Goal of Discussion of these Two technology

Implementation

The first pre-commercial 3G network was launched by NTT DoCoMo in Japan branded FOMA, in May of 2001 on a pre-release of W-CDMA technology.

The first commercial launch of 3G was also by NTT DoCoMo in Japan on October 1, 2001.

The second network of 3G was launched by SK Telecom in South Korea on the CDMA2000 1xEV-DO technology.

WiFi

WiFi is the popular name for the wireless Ethernet 802.11b standard for WLANS.

WiFi LANS operate using unlicensed spectrum 2.4GHZ band.Each base station can support connections only over a range of a hundred meters. Number of Service Providers that are offering WiFi services.

Commercial WiFiC.W. services are available in places such as Internet cafes, Coffee houses and Airports around the world.

WiSE Technologies provides commercial hotspots for airports, universities, and independent cafes in the US;T-Mobile provides hotspots in many Starbucks in the U.S, and UK; Pacific Century Cyber works provides hotspots in Pacific Coffee shops in Hong Kong

Advantages of WiFi

Wi-Fi networks support roaming, in which a mobile client station such as a laptop computer can move from one access point to another as the user moves around a building or area. Many access points and network interfaces support various degrees of encryption to protect traffic from interception.Wi-Fi is a global set of standards. Unlike cellular carriers, the same Wi-Fi client works in different countries around the world

How are WiFi and 3G same? Both are wireless

Both are access Technology

Both offer broadband data service

How are They Different?

The important ways in which WiFi and 3G approaches to offering broadband wireless access services are substantively different.

Current Business Model is Different3G represents an extension of the mobile service-provider model. His is the technology of choice for upgrading existing mobile telephone services to expand capacity and add enhanced services.

2. Spectrum policy and managementOne of the key distinctions between 3G and WiFi.Mobile Technology use licensed spectrum, while WiFi uses unlicensed shared spectrum. Important Implications for 1) Cost of service, 2)Quality of Service (QOS) and congestion management, 3) Industry Structure.Licensed spectrum is expensive. Unlicensed spectrum used by WiFi imposes strict power limits on users.It easier for a 3G provider to market a service.A WiFi network can address the problem of congestion associated with users on the same WiFi network.

3G and WiFi is their embedded support for voice services.Potential advantages of 3G over WiFi is that 3G offers better support for private communications than does WiFi. StandardizationService/Business model3G is more developed than WiFi as a business and service model.WiFi is more developed with respect to the upstream supplier markets.Both 3G and WiFi access face great supplier.

Some implications for industry structure and public policyWiFi is good for competition The success of WIFI wireless local access altetives is likely to be good for local competition If both 3G and WiFi survive, then the diversity of visible networking infrastructure strategies will be conductive to greater facilities-based competition.Success of the WiFi service model could help unlock the substantial investment in private networking infrastructure that could be used as the basis for constructing an alternative infrastructure to the PSTN and cable wire line networks.WiFi service model survives, then we would expect this to be inherently more competitive because of the lower entry barriers for setting up local property services.WiFi model depends on wore line infrastructure to connect to the Internet Backbone.

WiFi and 3G can complement each other for a mobile provider

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

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

Success of WiFi is potentially good for multimedia content

Multimedia content benefits for higher bandwidth services so the ability to support higher speed wireless access may help encourage the development of broadband multimedia content.

Conclusions

This article offers a qualitative comparison of two wireless technologies that could be viewed as simultaneously as substitute and/or complementary paths for involving to broadband wireless access. The two technologies are 3G, which is the preferred path for mobile providers, and WiFi , one of the many WLAN technologies

Any doubt?

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