3G VS. WIFI

3G VS. WIFI

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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


3G

3G is a Technology for Mobile service providers

M.S.P 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• Data rates : AMPS > 2G >3G


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.


http://en.wikipedia.org/wiki/NTT_DoCoMo

http://en.wikipedia.org/wiki/Japan

Standards• International Telecommunications Union consists of Six radio Interfaces.W-CDMACDMA2000 TD-CDMA/TD-SCDMA UWC DECT MOBILE WIMAX

• 3G technologies enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficeincy.


Evolution of 3G • Cellular mobile telecommunications networks are

being upgraded to use 3G technologies from 1999 to 2010.

• Japan was the first country to introduce 3G nationally, and in Japan the transition to 3G was largely completed in 2006.

• Korea then adopted 3G Networks and the transition was made as early as 2004.


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. 7www.123seminarsonly.com

Commercial WiFi• C.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


Free WiFi

• Many Groups, Communities, Cities, Municipalities have set up free WiFi networks.

• Many Smaller Countries and Municipalities provide Free WiFi hotspots and residential WiFi internet access to everyone .

• Many Universities provide free WiFi internet access.

• McDonald’s corporation offers WiFi access branded ‘McInternet’ 10www.123seminarsonly.com

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 Different• 3G 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 management• One 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.14www.123seminarsonly.com

3. Status of Technology development different The two technology differ with respect to their

stage of development in a number of was.

Development status3333Embedded support for services

Embedded serial-to-Wi-Fi module15www.123seminarsonly.com

• 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 model• 3G 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 policy

1. WiFi 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.


2. 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.


3. Spectrum policy is key• One of the key distinguishing features between 3G and

WiFi is the use of licensed verses unlicensed spectrum.

• 3G secondary markets would allow more flexible management of property rights.

• WiFi the emergence of spectrum markets may make it possible o adopt a suitable mechanism for addressing

congestion issues.


4. 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.


5. Technical progress favors heterogeneous future

• Technical progress in wireless services favors a heterogeneous wireless future.

• Once the world accepts the need to coordinate heterogeneous technologies.


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


3G VS. WIFI

Documents

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