Introduced in 1980s & completed inearly 1990s.Analog cellular mobile,Data speed up to2.4kbps.1G mobiles- AMPS,NMT,TACS.AMPS first launched by US & it is 1Gmobile system.Uses FDMA technique with 30KHz.Allows users to make voice calls in 1country.
Introduced in late 1980s & finished inlate 1990s.Digital cellular systems that are usedtoday.Voice transmission with digital signal.Digital modulation schemes-TDMA,CDMA.Data speed in 2G is up to 64kbps.During the second generation, themobile telecommunications industryexperienced exponential growth in terms ofboth subscribers and value-added services.
Generation between 2G and 3G.2.5G networks, such as General PacketRadio Service (GPRS), are an extension of2G networks .In this they use circuit switching forvoice and packet switching for datatransmission resulting in its popularitysince packet switching utilizes bandwidthmuch more efficiently.
In this system, each user’s packetscompete for available bandwidth, andusers are billed only for the amount ofdata transmitted.Failure in bringing any new evolution .Data speed in 2.5G is up to 144kbps.GPRS, EDGE and CDMA 2000 were2.5G technologies.
3G technology is intended for truemultimedia cell phone.3G networks were proposed to eliminatemany problems faced by 2G and 2.5Gnetworks, especially the low speeds andincompatible technologies such as TimeDivision Multiple Access (TDMA) andCode Division Multiple Access (CDMA)in different countries.Speeds from 125kbps-2Mbps.
In theory, 3G should work over NorthAmerican as well as European and Asianwireless air interfaces.In reality, the outlook for 3G is not verycertain. Part of the problem is thatnetwork providers in Europe and NorthAmerica currently maintain separatestandards’ bodies (3GPP for Europe andAsia; 3GPP2 for North America).
The standards’ bodies have not resolvedthe differences in air interfacetechnologies.There is also a concern that in manycountries 3G will never be deployed due toits cost and poor performance.Although it is possible that some of theweaknesses at physical layer will still existin 4G systems, an integration of services atthe upper layer is expected.
Performance in computer networking(WCDMA, WLAN Bluetooth) & mobiledevices area (cell phone & GPS).Access to Global Roaming & Clarity invoice calls, Fast Communication, Internet,Mobile T.V, Video Conferencing, VideoCalls, (MMS), 3D gaming etc .
The future of mobile systems is largelydependent upon the development andevolution of 4G systems, multimedianetworking, and upto some extent,photonic networks.It is expected that initially the 4Gmobile systems will be used independentfrom other technologies.high-speed data access.high quality streaming video.combination of wi-fi and wi-max.Smooth global roaming with lower cost.
In addition, developments in photonicswitching might allow mobilecommunication on a completely photonicnetwork using Wavelength DivisionMultiplexing (WDM) on photonicswitches and routers.These technology arrival in 2010 –2015.SDR,OFDM,OFDMA and MIMO.
The evolutionary view of 4Gsystems to 5G includes a support ofwireless World Wide Web allowing ahighly flexible and reconfigurabledynamic networks.5G is a packet switched wirelesssystem with wide area coverage andhigh throughput.Complete wireless communicationwith almost no limitation.Advanced features: powerful andin huge demand in future.
5G wireless uses OFDM andmillimeter wireless that enables datarate of 20 mbps and frequency bandof 2-8 GHz.5G is going to be a packed basednetwork.Faster data transmission that ofthe previous generations.Multi-Media Newspapers, watchT.V programs with the clarity as tothat of an HD T.V.large phone memory, dialing speed ,clarity in audio and video etc.
World Wide Cellular phonesExtra ordinary data capabilitiesHigh connectivityBright futureFlexible channel bandwidth between 5 and 20MHz, optionallyup to 40MHz.Data rate of at least 1Gb/s between any two points in theworld.Increase system efficiency up to 3 bit/s/Hz/cell in the downlinkand 2.25 bit/s/Hz/cell for indoor usage.
5G terminals will have software defined radios.New error-control schemes.Access to different wireless technologies.Combine different flows from different technologies.Choice among different wireless/mobile access.Network providers for a given service.
High resolution, bi-directional large bandwidth shaping.Advanced billing interfaces: attractive and effective.Subscriber supervision tools for fast action.High quality services based on Policy to avoid error.Large broadcasting of data (GB) supports almost 65,000connections.Transport class gateway with unparalleled consistency.More accuracy by traffic statistics.Remote management :better and fast solution.Remote diagnostics1Gbps connectivity speed.Virtual private network.
All delivery service out of business prospect.High uploading and downloading speed enhanced and available connectivity just about the world.High speed, high capacity, and low cost per bit.Support interactive multimedia, voice, streaming video, Internetand other broadband services.Global access, service portability, and scalable mobile services.Through remote management offered by 5G technology a user canget better and fast solution.
Wearable devices with AI(Artificial Intelligence) capabilities.Global Network.Media independent handover.Radio resource management.VoIP(Voice Over IP) enabled devices.With 6th sense technology.
A new revolution of 5G technology will going to toughcompetition to normal computers and laptops whose market valuewill be affected.The coming up 5G technology will available in the market inaffordable rates, high peak future and much reliability than itspreceding technologies.5G can serve as a flexible platform and wireless carriers have anopportunity to shorten investment return, improve operatingefficiency and increase revenues.Nowadays we are using 2G and 3G technologies and 4Gtechnologies will coming soon, but in future we will want to ready toface 5G technologies and its some features.