There are currently widely different views throughout the wireless industry as to what constitutes a 3G wireless access network. The problem is rapidly getting worse with the increased usage of 4G to describe, in many cases, technologies that are basically just evolutions of 3G technologies. The general concept behind different technology ―generations‖ is that each new generation offers significant ―revolutions‖ in performance and capabilities compared to its predecessor. Third Generation (3G) mobile devices and services will transform wireless communications into on-line, real-time connectivity. 3G wireless technology will allow an individual to have immediate access to location-specific services that offer information on demand. Mobile phones are rapidly becoming the preferred means of personal communication,creating the worlds largest consumer electronics industry.
Wireless telecommunications is the transfer of information between two or more points that are not physically connected. Distances can be short, such as a few meters for television remote control, or as far as thousands or even millions of kilometers for deep-space radio communications.
Mobile communication refers to a form of communication which does not depend on a physical connection between the sender and receiver and who may move from one physical location to another during communication.
The first pre-commercial 3G network was launched by NTT DoCoMo in Japan on 1998, branded as FOMA. It was first available in May 2001 as a pre-release (test) of W-CDMA technology.The first commercial launch of 3G was also by NTT DoCoMo in Japan on 1 October 2001. On 11 December 2008, India entered the 3G arena with the launch of 3G enabled Mobile and Data services by Government owned Mahanagar Telephone Nigam Ltd MTNL in Delhi and later in Mumbai. MTNL becomes the first 3G Mobile service provider in India.
190 3G networks were operating in 40 countries and 154 HSDPA(High Speed Downlink Packet Access )networks were operating in 71 countries, according to the Global Mobile Suppliers Association (GSA). In Asia, Europe, Canada and the USA, telecommunication companies use W-CDMA technology with the support of around 100 terminal designs to operate 3G mobile networks.
Early work on 3G in the ITU was directed towards obtaining a global spectrum allocation since multi-band radios were at that time economically unattractive. Similarly a single global standard for 3G seemed at the time the only realistic solution. However it became rapidly clear that even the 230 MHz of new spectrum identified for IMT- 2000 in 1992 would be insufficient for future mobile needs. At the ITU World Radio Conference in 2000 all the major existing cellular bands were also added, increasing the potential IMT-2000 spectrum availability by approximately three times. Fortunately it also became practical to produce economical multi-band radios.
1G The First Generation of mobile phones consisted of the analog models that emerged in the early 1980s. 2G The Second Generation of digital mobile phones appeared about ten years later along with the first digital mobile networks. During the second generation, the mobile telecommunication industry experienced exponential growth both in terms of subscribers as well as new types of value-added services.
The World is Mobilising :-Worldwide mobile penetration increased from 50.3% at end of 2007 to 56.6% at the end of 2008, and has crossed 62% by end of 2009.This growth trend is expected to continue in the coming years. The worldwide mobile penetration level is expected to crossnear 80% by end-2013.
It is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union Application services include wide-area wireless voice telephone, mobile Internet access, video calls and mobile TV all in a mobile environment. It is required to meet IMT-2000 technical standards, including standards for reliability and speed (data transfer rates). To meet the IMT-2000 standards, a system is required to provide peak data rates of at least 200 kbps (about 0.2 Mbps).
There are three types of players in telecomservices:•1-State owned companies (BSNL and MTNL)2-Private Indian owned companies (RelianceInfocomm,Tata Teleservices,)3-Foreign invested companies (Hutchison-Essar,Bharti Tele- Ventures,Escotel, Idea Cellular, BPL Mobile, SpiceCommunicati ons)
Higher bandwidth enables a range of new applications. For the consumer Video seamless roaming, TV broadcast Video calls, video clips – news, music, sports Enhanced gaming, chat, location services… For business High speed teleworking / VPN access Sales force automation Video conferencing Real-time financial information
3G Network Architecture Core Network Wireless Telephone Access Network Programmable Network Gateway Mobile Access Softswitch Router Application IP Intranet Server Access (HLR) IP Intranet IP Point User Profiles & Base Stations Authentication 802.11 802.11 3G Air Wired Access InternetInterface Access Point
Features includes :- Phone calls/Fax Seamless Roaming Send/Receive large email messages High Speed Web Navigation/Maps Video Confrencing. Speed :- 144 kbps – 2mbps Time to download a 3 min mp3 song : 11 sec – 1.5 min
Mobile internet connectivity. Mobile interview. Multimedia services such as digital photoes taken by and shared by wireless handsets. Wireless applications downloading. Music on your mobile. EnhancedLocation BasedServices.
• Realtime Multiplayer Gaming ispossible in 3Gsystem.
Higher call volumes and support for multimedia data applications such as video and photography. Faster data transfer rates. Free or cheap call rates overwide. Capability to determine geographic position of mobiles and report it. Worthwhile for users that needconnectivity on the move.
High spectrum licencing fees for the 3g services Huge capital required to build infrastructure for 3g services. Health impact because of the electromagnetic waves. Prices are very high for 3g mobile services. Will 2g users switch to 3g services? It is a Big question. Takes time to catch up as the service is new. Expense of 3G phones. It is a challenge to build the necessary infrastructure for 3G. Limitation to meet expectations of applications like multimedia, full motion video, wireless teleconferencing. ◦ Wider Bandwidth
As of December 2011, there are no 4G networks that fulfil the International Telecommunication Unions criteria of being able to achieve 1Gbps while stationary. In 2002, the strategic vision for 4G—which ITU designated as IMT-Advanced—was laid out. On 12 December 2010, VivaCell-MTS launches in Armenia 4G/LTE(Long Term Evolution 3GPP) commercial test network with a live demo conducted in Yerevan. On 28 April 2011, Lithuanias Omnitel opened LTE "4G" network working in 5 biggest cities. In September 2011, All three Saudi telecom giants STC, Mobily and Zain announced that they will offer 4G LTE for high speed USB sticks for mobile computers, with further development for telephones by 2013. In 2011, Argentina´s Claro launch 4G HSPA+ network in the country.
3GPP Long Term Evolution (LTE) Data speeds of LTE Peak Download 100 Mbps. Peak Upload 50 Mbps. Mobile WiMAX (IEEE 802.16e) Data speeds of WiMAX Peak Download 128 Mbps. Peak Upload 64 Mbps.
4G Fourth Generation Cellular Communication (4G) 3G •4G is not one defined technology or standard, but rather a collection of technologies and protocols aimed at creating2G fully packet-switched networks optimized for data. •4G networks are projected to provide speeds of 100 Mbps while moving and 11G Gbps while stationary. •Lower cost than previous generations. •OFDM used instead of CDMA. 0G
4G: Anytime, Anywhere Connection Also known as ‗Mobile Broadband everywhere‘ ‗MAGIC‘ Mobile Multimedia Communication Anywhere, Anytime with Anyone Global Mobility Support Integrated Wireless Solution Customized Personal Service According to 4G Mobile Forum, in 2008 over $400 billion would be invested in 4G mobile projects. In India, communication Minister Mr. Dayanidhi Maran, had announced to establish a national centre of excellence to work in 4G arena.
Majority of Lifecycle of 4G is companies expect expected to be of 15 widespread usage of years. 3g by the end of 2013.
Lack of coverage as it is still a new service. High power usage.
Less Complexity, Faster TransmissionUnlike the 3G networks which are a combination of circuitswitched and packet switched networks,4G will be based on packet switching only. This will allowlow-latency data transmission. 3G 4G Leading U.S. Carrier 3G International Carrier is EVDO network currently testing 4G communication averages 400 to 700 Kbps at 100 Mbps while moving, with peak rates up to 2 and 1 Gbps while stationary. Mbps.
3g services will add invaluable dimension for the integral part of the modern world. In the near future,mobility will not be considered as an add- on:it will become a fundamental aspect. Development of 3g network will continue and pick up pace in the near future. True 4G services could come only after 2015. 4G will open door to various mobile applications. Opinions on when 4G will be available,might be differ. 4G‘s predecessor,3G wireless is still taking off. Some analyst agree that there is no ―Killer App ― for 4G today.