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8/8/2019 Ffinal Ppt on 4G
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4G
TECHNOLOGY
xyz
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Introduction
4G is aninitialism oftheterm Fourth-Generation
Communications System.
A 4G system will provide anend-to-endIP
solution wherevoice,data andstreamed
multimedia can beservedtouserson an
"Anytime,Anywhere" basis athigherdata rates
than previousgenerations.
Noformal definitionisset asto what 4G is, but
theobjectivesthat are predictedfor4G can be
summarized asfollows:
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Thefollowing aresome possiblefeaturesofthe 4G systems:
Supportinteractivemultimedia,voice,video, wirelessinternet andotherbroadbandservices.
Highspeed,highcapacity and low cost perbit.
Global mobility,service portability,scalablemobilenetworks.
Seamlessswitching,variety ofservices basedon Quality ofService(QoS) requirements
Better scheduling andcall admissioncontrol techniques.
Adhocnetworks andmulti-hop networks.
Introduction -contd
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Introduction - contd
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Technology - parametersof
3G Vs 4G
Attribute 3G 4G
MajorCharacteristicPredominantly voice- data as
add-onConvergeddata and VoIP
Network Architecture Widearea Cell based Hybrid integrationofWirelessLan (WiFi),Blue Tooth,WideArea
Frequency Band 1.6- 2.5 GHz 2 8 GHz
Component DesignOptimized antenna; multi-band
adapters
Smart antennas; SWmulti-band;
widebandradios
Bandwidth 5 20 MHz 100+ MHz
Data Rate 385 Kbps- 2 Mbps 20 100 Mbps
Access WCDMA/CDMA2000 MC-CDMAorOFDMForward ErrorCorrection Convolutioncode 1/2, 1/3; turbo Concatenated Coding
Switching Circuit/Packet Packet
Mobiletop Speed 200kmph 200kmph
IP Multipleversions All IP (IPv6.0)
Operational ~2003 ~2010
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Architecture
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Architecture - contd
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Challenges
4G definition Aglobal consensusonthe 4G definitionisneeded beforethe
standardizationstarts.
Despiteeffortstherestill aretoomany diverging approachedto4G.
Seamlessconnectivity Inter- andintra-networkconnectivity isfundamental tothe
provisionoftemporally andspatially seamlessservices.
Vertical andhorizontal handovers arecritical for4G.Intheformercase,theheterogeneity andvariety ofnetworksexacerbatethe problem.
Latency Many 4G services aredelay sensitive.
Guaranteeingshortdelaysinnetworks withdifferent accessarchitecture andcoverageisfarfromstraightforward.
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Challenges -
contd Concealingcomplexity 4G networks would beundoubtedly complex, butthisneedsto
behiddenfromtheuser.
Spectrumissues
Spectrumfor4G will be allocatedin2007. Itisdifficulttodesign a wirelesssystem withoutknowingthechannel,in particularifexploitmulti-antenna technology.
Complex resource allocation Managementoftime,frequency andspatial resourcesin a multi-
network,multi-userenvironmentisfarfromtrivial.
Interference Multiple accessinterferencecontrol andmitigationin
heterogeneousenvironments (coexisting airinterfaces,variedterminals andservices) is anissue.
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Challenges -
contd Powerconsumption By any measure, powerconsumptioninfuturemulti-
functionmulti-standard 4G terminals will sharplyincrease.
Usability isseriously compromised,heatmanagementbecomes anissue.
Cost Costofinfrastructureiskey forthesuccessof4G.
However,new access architecturesmay require alargenumberofaccess points.
Costofterminal should be low enoughto attractcustomers.
Servicesneedto be attractively priced.
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Development
A Japanesecompany has beentesting a 4Gcommunicationsystem prototype at 100Mbit/s whilemoving, and 1 Gbit/s whilestationary. Recentlyreached5 Gbit/smoving at 10km/h, andis planningonreleasingthefirstcommercial networkin2010.
AnIrishcompany has announcedthatthey havereceived a mobilecommunications licensefromIrishTelecomsregulator. Thisservice will beissuedthemobilecode088 inIreland and will beusedfortheprovisionof4G Mobilecommunications.
Sprint plansto launch 4G servicesintrial markets by
theendof2007 with planstodeploy a networkthatreaches asmany as 100million peoplein2008
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Conclusion
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Sourcesontopic
Web Link Wikipedia title: 4G
http://en.wikipedia.org/wiki/4G National Science Foundation
http://www.nsf.gov Groups working on 4G : WWRF , projects funded by NSF , Lucent , AT&T, Motorola, etc.
http://www.wireless-world-research.org/ 4G Wireless Systems
http://users.ece.gatech.edu/~jxie/4G 4G Wireless Standard
http://www.nd.edu/~mhaenggi/NET/wireless/4G/ IEEE:
http://www.ieee.org IEEE Communications Society:
http://www.comsoc.org/index.html International Telecommunications Union:
http://www.itu.org Association of Computer Machinery:
http://www.acm.org European Telecommunications Standard Institue:
http://ww.etsl.org 3Gpp partnership project:
http://www.3gpp.org Internet Engineering Task Force:
http://www.ietf.orgB Bluetooth official website:
htt ://www.bluetooth.com
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THANK YOU