3 G VS WIFI www 123 seminarsonly com

3 G VS. WIFI www. 123 seminarsonly. com 1

Introduction Ø 3 G 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. Ø WIFI refers to the 802. 11 b wireless Ethernet standard that was designed to support wireless LANs. Ø Two technology reflect fundamentally Ø The Goal of Discussion of these Two technology www. 123 seminarsonly. com 2

3 G Ø 3 G is a Technology for Mobile service providers Ø 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 > 2 G >3 G www. 123 seminarsonly. com 3

Ø Implementation • The first pre-commercial 3 G network was launched by NTT Do. Co. Mo in Japan branded FOMA, in May of 2001 on a pre-release of W-CDMA technology. • The first commercial launch of 3 G was also by NTT Do. Co. Mo in Japan on October 1, 2001. • The second network of 3 G was launched by SK Telecom in South Korea on the CDMA 2000 1 x. EV-DO technology. www. 123 seminarsonly. com 4

ØStandards • International Telecommunications Union consists of Six radio Interfaces. v. W-CDMA v. CDMA 2000 v. TD-CDMA/TD-SCDMA v. UWC v. DECT v. MOBILE WIMAX • 3 G technologies enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficeincy. www. 123 seminarsonly. com 5

ØEvolution of 3 G • Cellular mobile telecommunications networks are being upgraded to use 3 G technologies from 1999 to 2010. • Japan was the first country to introduce 3 G nationally, and in Japan the transition to 3 G was largely completed in 2006. • Korea then adopted 3 G Networks and the transition was made as early as 2004. www. 123 seminarsonly. com 6

Wi. Fi Ø Wi. Fi is the popular name for the wireless Ethernet 802. 11 b standard for WLANS. • Wi. Fi LANS operate using unlicensed spectrum 2. 4 GHZ band. • Each base station can support connections only over a range of a hundred meters. • Number of Service Providers that are offering Wi. Fi services. www. 123 seminarsonly. com 7

Ø Commercial Wi. Fi • C. W. services are available in places such as Internet cafes, Coffee houses and Airports around the world. www. 123 seminarsonly. com 8

• • • Wi. SE 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 www. 123 seminarsonly. com 9

ØFree Wi. Fi • Many Groups, Communities, Cities, Municipalities have set up free Wi. Fi networks. • Many Smaller Countries and Municipalities provide Free Wi. Fi hotspots and residential Wi. Fi internet access to everyone. • Many Universities provide free Wi. Fi internet access. • Mc. Donald’s corporation offers Wi. Fi access branded ‘Mc. Internet’ www. 123 seminarsonly. com 10

ØAdvantages of Wi. Fi • 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 www. 123 seminarsonly. com 11

How are Wi. Fi and 3 G same? Ø Both are wireless Ø Both are access Technology Ø Both offer broadband data service www. 123 seminarsonly. com 12

How are They Different? Ø The important ways in which Wi. Fi and 3 G approaches to offering broadband wireless access services are substantively different. Ø Current Business Model is Different • 3 G represents an extension of the mobile serviceprovider model. His is the technology of choice for upgrading existing mobile telephone services to expand capacity and add enhanced services. www. 123 seminarsonly. com 13

2. Spectrum policy and management • • • One of the key distinctions between 3 G and Wi. Fi. Mobile Technology use licensed spectrum, while Wi. Fi 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 Wi. Fi imposes strict power limits on users. It easier for a 3 G provider to market a service. A Wi. Fi network can address the problem of congestion associated with users on the same Wi. Fi network. www. 123 seminarsonly. com 14

3. Status of Technology development different The two technology differ with respect to their stage of development in a number of was. ü Development status 3333 ü Embedded support for services Embedded serial-to-Wi-Fi module www. 123 seminarsonly. com 15

• 3 G and Wi. Fi is their embedded support for voice services. • Potential advantages of 3 G over Wi. Fi is that 3 G offers better support for private communications than does Wi. Fi. ü Standardization ü Service/Business model • 3 G is more developed than Wi. Fi as a business and service model. • Wi. Fi is more developed with respect to the upstream supplier markets. • Both 3 G and Wi. Fi access face great supplier. www. 123 seminarsonly. com 16

Ø Some implications for industry structure and public policy 1. Wi. Fi is good for competition • The success of WIFI wireless local access altetives is likely to be good for local competition If both 3 G and Wi. Fi survive, then the diversity of visible networking infrastructure strategies will be conductive to greater facilities-based competition. Success of the Wi. Fi 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. Wi. Fi 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. Wi. Fi model depends on wore line infrastructure to connect to the Internet Backbone. • • www. 123 seminarsonly. com 17

2. Wi. Fi and 3 G 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. • 3 G and Wi. Fi networks provides the opportunity to offer both near coverage with good voice telephony support. www. 123 seminarsonly. com 18

3. Spectrum policy is key • One of the key distinguishing features between 3 G and Wi. Fi is the use of licensed verses unlicensed spectrum. • 3 G secondary markets would allow more flexible management of property rights. • Wi. Fi the emergence of spectrum markets may make it possible o adopt a suitable mechanism for addressing congestion issues. www. 123 seminarsonly. com 19

4. Success of Wi. Fi 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. www. 123 seminarsonly. com 20

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. www. 123 seminarsonly. com 21

ü 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 3 G, which is the preferred path for mobile providers, and Wi. Fi , one of the many WLAN technologies www. 123 seminarsonly. com 22