PowerPoint Presentation

3g-tecnology & COMPARISION PRESENTED BY-

ABHISHEK KUMAR KESHARWANIELECTRONICS & COMMUNICATION1106931004(6th semester)

INTRODUCTION TO NETWORKS 1G.

2G..

3G

4G.

MOBILES

Estimation of Global Wireless Subscriber growth

What is network?

A network is a group of two or morecomputer systems or mobile systemlinked together.

What is 1G wireless technology? 1G was introduced in 1980. The main difference between then existing systems and 1G was invent of cellular technology and hence it is also known as First generation of analog cellular telephone. In 1G wireless technology the network contains many cells (Land area was divided into small sectors, each sector is known as cell, a cell is covered by a radio network with one transceiver) and so same frequency can be reused many times which results in great spectrum usage and thus increased the system capacity i.e. large number of users could be accommodated easily.

1G WIRELESS ADVANTAGE Using Analog signals Listen to handset Frequency typically 150MHz & above

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DRAWBACKS OF 1G Poor voice quality Poor battery life Large phone size No security Frequent call drops Limited capacity and poor handoff reliability.

SECOND GENERATION2G phones using global system for mobile communications (GSM) were first used in the early 1990 s in Europe. GSM provides voice and limited data services and uses digital modulation for improved audio quality. Digital AMPS(Advanced Mobile Phone System) , CDMA were some of the 2G systems.

FEATURES INCLUDES:TextSMSFax 2 Dimensional

DRAWBACKS OF

The GSM is a circuit switched , connection oriented technology, where the end systems are dedicated for the entire call session. This causes inefficiency in usage of bandwidth and resources.The GSM enabled systems do not support high data rates. They are unable to handle complex data such as video.Reduce range of sound.Weaker digital signal.

2.5G WIRELESS An interim stage that is taken between 2G and 3G that is 2.5G Features includes:- Phone calls/ Fax Voice mail Send/Receive e-mail messages web browsing camera phones speed: 64-144 kb/sec Time to download a 3 min MP3 song: 6-9 min

. -Network

3G is thethird generation of mobile telecommunication.3G networks support services that provide an information transfer rate of at least 200kbit/s. Later 3G releases, often denoted3.5Gand3.75G, also providemobile broadbandaccess of severalMbit/stosmartphonesandmobile modemsin laptop computers.

3G finds application in wireless voicetelephony,mobile, Internet access,fixed wirelessInternet access,video callsandmobile TV.3G-APPLICATION

THIRD GENERATION To meet the growing demand in network capacity, rates required for high speed data transfer and multimedia applications , 3G standards started evolving. It is based on the InternationalTelecommunication Union (ITU) family of standards.3G technologies enable network operators to offer users a wider range of more advanced services.Services include wide-area wireless voice telephony, video-calls and broadband wireless data , all in a mobile environment. The data are sent through the technology called Packet switching.Voice calls are interpreted through circuit switching.

Features includesPhone calls/ fax Global roaming Send/receive large email messages High speed web Navigation / maps Video conferencing TV streaming Electronic agenda meeting reminder Speed: 200 kb/sec-2mb/sec Time to download a 3 min MP3 song: 11 sec-1.5 min

MUSIC ON YOUR MOBILE!!

Music is an important mobile content category. Mobiles cant compete with Ipods etc. True mobility immediate & direct access to downloadable music,with no cables or PC.

Taking games to the next level

3G technology has taken the gaming to the next level.

Real-time multiplayer gaming is possible in 3G system.

Innovative new services are being added by developer daily.

ADVANTAGES OF

New radio spectrum to relieve overcrowding in existing systems. More bandwidth , security & reliability. Inter-portability between services providers. High data rates. Rich multimedia services. Always online devices.

DISADVANTAGES OF

Expensive input fees for the 3G service licenses. Numerous differences in the licensing terms. It is a challenge to build the necessary infrastructure for 3G Expense of 3G phones . Lack of buy-in by 2G mobile users for the new 3G wireless services. Large cell phones.

4G ANYTIME,ANYWHERE CONNECTION

Also known as Mobile Broadband Everywhere One of the terms used to describe 4G is: MAGIC Mobile Multimedia Anytime Anywhere Global mobility Support Integrated wireless solution and Customized personal service.

WHAT IS 4G??? Faster and more reliable 100 Mbps Lower cost than previous generations. Multi-standard wireless system - Bluetooth , Wifi Coverage of wide area. Wide Variety of services capability. Ad Hoc networking IPv6 core Potentially IEEE standards 802.11 Only packet switching used unlike previous generations. OFDMA(Orthogonal Frequency Division Multiple access) and MIMO(Multiple In Multiple Out) replace CDMA spread spectrum radio technology.

3G VS 4G

Specifications 3G 4G Frequency band 1.5- 2.8 GHz 2-8 GHz Band width 5-20 MHz 5-20 MHz Data rate upto 2 Mbps 20 Mbps or more Access wideband CDMAMulti-carrier-CDMA FEC Turbo codes concatenated codes Switching Circuit/ Packet Packet Top speeds 200kmph 200kmph

ADVANTAGES OF 4G High usability: anytime, anywhere and with any technology. Support for multimedia services at low transmission cost. Higher bandwidth , tight network security.DISADVANTAGES OF 4G The equipment required to implement a next generation network is still very expensive. Carriers and providers have to plan carefully to make sure that expenses are kept realistic.

THANK YOU

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