ihs-从4g到5g：有什 么服务提供商？（英文版）-2017-19页

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1、4Gto5G:whatserviceprovidersaresaying14G:layingthegroundworkfor5G3It’sanLTEworldrapidlybecominga4GworldWe’rejustgettingintoa4Gworld—LTE-AandLTE-APro—and5Gisalreadyaroundthecorner.Pre-commercialfixed-wirelessaccess(FWA)servicesareexpectedinNorthAmericaassoonastheendof2017,withen

2、hancedmobilebroadband(eMBB)anticipatedinAsiainthesecondhalfof2018.Toassessthesituation,weinterviewed21oftheworld’slargest4Gserviceproviderstotakestockofwheretheirnetworksare—andwherethey’reheading.KeyfindingsfromourrecentEvolutionfrom4Gto5Gsurveyfollow.44GischuggingalongOurser

3、viceproviderrespondentshavealreadyimplementedmanyLTE-Afeatures.71%havealreadyrolledoutkeytechnologiessuchas:‒Enhancedinter-cellinterferencecoordination(eICIC)‒Three-componentcarrieraggregation(CA)‒Coordinatedmultipointoperation(CoMP)52017istheyearof4x4MIMOandhighordermodulatio

4、nThesecondbatchoffeaturesdeployedbyoursurveyrespondentsincludes:‒4x4multiple-inputmultiple-output(MIMO)—theuseofmultipletransmittersandreceiverstoaddcapacityandimprovenetworkqualityatminimumcost‒256quadratureamplitudemodulation(QAM)—tooffermuchfasterdataratesandhigherlevelsofs

5、pectralefficiencyfortheradiocommunicationssystem6AndnearlyhalfourrespondentswilldeployLTE-AProLAAbyyear’send48%ofserviceproviderssurveyedplantodeploylicensedassistedaccess(LAA)bytheendof2017.Anothergroupaccountingfor38%hasplansforLTE+WiFiLinkaggregation(LWA).Thestrongesttracti

6、onwilloccurinNorthAmericaandpartsofAsiaPacific.NarrowBandInternetofThings(NB-IoT)isthemostdeployedLTE-AProfeaturesofar,andMulteFireisgainingmomentum.7Virtualpacketcoreisakeycomponentof4G…andaprerequisitefor5GnewcoreHowever,whenaskedabouttheir4Gnetworkfunctionsvirtualization(NF

7、V)migrationtimeframe,only43%ofrespondentshadmadethemovetoavirtualevolvedpacketcore(EPC)oritscomponents.VirtualpacketcoreisacriticalworkitematstandardsbodiesITUIMT-2020,3GPPandETSI.8Getready:5Giscomingfasterthanyouthink95Gismovingfasterthanpreviousgenerations5GReadiness:Pre-Com

8、mercialTrials,CommercialDeploymentn=21Whenaskedabout5Greadine