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1、WANG_LAYOUT.qxp_Layout1/30/141:29PMPage1225GWIRELESSCOMMUNICATIONSYSTEMS:PROSPECTSANDCHALLENGESCellularArchitectureandKeyTechnologiesfor5GWirelessCommunicationNetworksCheng-XiangWang,Heriot-WattUniversityandUniversityofTabukFouratHaider,Heriot-WattUniversityXiqiGaoandXiao-HuYou,Southea
2、stUniversityYangYang,ShanghaiTechUniversityDongfengYuan,ShandongUniversityHadiM.Aggoune,UniversityofTabukHaraldHaas,UniversityofEdinburghSimonFletcher,NECTelecomMODUSLtd.ErolHepsaydir,Hutchison3GUKABSTRACTTheEuropeanMobileObservatory(EMO)reportedthatthemobilecommunicationsectorThefourt
3、hgenerationwirelesscommunica-hadtotalrevenueof€174billionin2010,there-tionsystemshavebeendeployedoraresoontobybypassingtheaerospaceandpharmaceuticalbedeployedinmanycountries.However,withsectors[2].Thedevelopmentofwirelesstech-anexplosionofwirelessmobiledevicesandser-nologieshasgreatlyi
4、mprovedpeople’sabilitytovices,therearestillsomechallengesthatcannotcommunicateandliveinbothbusinessopera-beaccommodatedevenby4G,suchasthespec-tionsandsocialfunctions.trumcrisisandhighenergyconsumption.Wire-Thephenomenalsuccessofwirelessmobilelesssystemdesignershavebeenfacingthecommunic
5、ationsismirroredbyarapidpaceofcontinuouslyincreasingdemandforhighdatatechnologyinnovation.Fromthesecondgenera-ratesandmobilityrequiredbynewwirelesstion(2G)mobilecommunicationsystemdebutedapplicationsandthereforehavestartedresearchin1991tothe3Gsystemfirstlaunchedin2001,onfifthgeneration
6、wirelesssystemsthatarethewirelessmobilenetworkhastransformedexpectedtobedeployedbeyond2020.Inthisfromapuretelephonysystemtoanetworkthatarticle,weproposeapotentialcellulararchitec-cantransportrichmultimediacontents.The4Gturethatseparatesindoorandoutdoorscenar-wirelesssystemsweredesigned
7、tofulfilltheios,anddiscussvariouspromisingtechnologiesrequirementsofInternationalMobileTelecom-for5Gwirelesscommunicationsystems,suchasmunications-Advanced(IMT-A)usingIPforallmassiveMIMO,energy-efficientcommunica-services[3].In4Gsystems,anadvancedradiotions,cognitiveradionetworks,and
