5G无线通信基础英文论文ABriefIntroductionAbout5GNetwork.docx
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5G无线通信基础英文论文ABriefIntroductionAbout5GNetwork.docx
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5G无线通信基础英文论文ABriefIntroductionAbout5GNetwork
ABriefIntroductionAbout5GNetwork
Jia
Abstract
Withtherapiddevelopmentofwirelesstechnologies,theconceptoftheFifthGeneration(5G)wirelesscommunicationsystemstartedtoemerge.Butmostpeopleknowlittleabout5G,includingsomeaspectsof5Gwirelesscommunicationnetworks,justlikewhat5Gisabout:
whatarethebuildingblocksofcore5Gsystemconcept,whatarethemainchallengesandhowtotacklethem.Besides,Anumberofcountriesandorganizationsworkingon5G,5GdevelopmentsituationinChinaisofconcerntoeveryone,Chinaalsoneedstohaveitsownplaceinsuchacompetitiveenvironment.
Keywords:
5GNetwork,history,Coreconcept,Challenges,Solutions,Inchina
1.Introduction
5G(Fifth-generationmobilecommunications)isanewgenerationofmobilecommunicationmobilecommunicationsystemsfor2020,withhighspectralefficiencyandlowpowerconsumption,intermsoftransferrateandresourceutilizationimprovementover4Gsystem10times,itswirelesscoverageperformanceanduserexperiencewillbesignificantlyimproved.5Gwillbecloselyintegratedwithotherwirelessmobilecommunicationtechnology,constituteanewgenerationofubiquitousmobileinformationnetwork,tomeetfuturemobileInternettraffic1000xdevelopmentneedsin10years.[1]
InthispaperIwillshowyousomelatestresearchanddevelopmenthistory,whatarethebuildingblocksofcore5Gsystemconcept,whatarethemainchallengesandhowtotacklethemfirstly.IntherestofpaperIwillshowhow5GdevelopmentinChinainrecentyearsandmyconclusionafterresearchliterature.
2.Researchanddevelopmenthistory
February2021,theEUannouncedthatitwouldgrant50millioneurostoacceleratethedevelopmentof5Gmobiletechnology,planstolaunchamaturestandardin2020.[2][3]
May13,2021,SouthKorea'sSamsungElectronicsCo.,Ltd.announcedthatithassuccessfullydevelopedthe5thgenerationmobilecommunication(5G)
coretechnology,whichisexpectedtobeginin2020tocommercialization.Thetechnologycantransmitdataatultra-highfrequency28GHzto1Gbpspersecondspeed,andthemaximumtransmissiondistanceofupto2km.Incontrast,thecurrentfourthgenerationLongTermEvolution(4GLTE)andservicesofonlythetransmissionrate75Mbps.Priortothetransmissionbottleneckiswidelybelievedthatatechnicalproblem,whileSamsungElectronicsistheuseof64adaptivearrayantennaelementstransmissiontechnologytocrackthisproblem.Comparedwiththetransmissionspeedof4GtechnologyinSouthKorea,5Gtechnologyishundredsoftimesfaster.Usingthistechnique,downloadahigh-definition(HD)moviejustneed10seconds.
Backin2020,Huaweihaslaunchedtheearlyresearchrelatedtechnologies,andtoshowtheprototypeofthe5GbaseinlaterNovember6,2021,Huaweiannouncedthatitwouldinvest$600millionin2018forthe5Gtechnologydevelopmentandinnovation,andpredictedthatuserswillenjoy20Gbpscommercial5Gmobilenetworksin2020.
May8,2021,theJapanesetelecomoperatorNTTDoCoMoannouncedofficially,Ericsson,Nokia,Samsungandothersixmanufacturerstoworktogether,begantestingoverride1000timesthanexisting4Gnetworksthecarryingcapacityofthehigh-speednetwork5Gnetwork,thetransmissionspeedisexpectedto10Gbps.Outdoortestingscheduledtocommencein2021,andexpectstobeginoperationsin2020.[3]
March1,2021,theBritish"DailyMail"reportedthattheBritish5Gnetworkhassuccessfullydevelopedandtestedfordatatransmissionwithin100metersperseconddatatransferofupto125GB,istimesthe4Gnetwork,intheory,a30secondstodownloadmovies,addingthatinvestmentinpublictestin2018,2020officiallyputintocommercialuse.[4]
February11,2021intheafternoonnews,IMT-2020(5G)topromotethegroup(hereinafterreferredtoas"advancegroup")heldaconferenceinBeijing5Gconceptofwhitepaper.WhitePaperfromthemobileInternetandnetworkingcomposedmainlyofapplicationscenarios,businessneedsandchallengesofstartingsummedcontinuouswideareacoverage,highreliabilityofthefourmajortechnology5Gsceneofhighcapacity,lowpowerconsumptionandlowlatencyconnection.Meanwhile,thecombinationofcoretechnologiesandkeycapabilities5Gand5Gconceptproposedbythe"flagsexualityindex+asetofkeytechnologies"commondefinition.
March3,2021,theEuropeanEconomicandSocialCommissionforDigitalFurusawaOttingeofficiallyannouncedtheEU'svisionofpublic-privatepartnerships5G,andstrivetoensurethattherighttospeakinthenextgenerationofmobiletechnologyinEuropeintheglobalsaidthat,5Gvisionofpublic-privatepartnershipinvolvesnotonlyfiber,wirelessorsatellitecommunicationsnetworkintegratedwitheachother,willalsousethesoftware-definednetworking(SDN),networkfunctionsvirtualization
(NFV),MobileEdgecomputing(MEC)andFogComputingtechnology.Inthespectrum,theEU'svisionofpublic-privatepartnershipwillbedesignated5Ghundredsofmegahertztoimprovenetworkperformance,60GHzandhigherfrequencybandswillalsobetakenintoaccount.
Anumberofcountriesandorganizationsannounced,5Gnetworkwillbeoperationalbetween2020~2025.
3.CoreConcept
Whatis5G?
Ibelievemanypeoplewillbesoquestionablewhensee5G.Judgingfromthewordmeaning,5Greferstothefifthgenerationofmobilecommunications.However,howshoulditdefine?
Currently,theglobalindustryfor5Gconceptnotyetagreed.ChinaIMT-2020(5G)groupreleasedtheWhitePaperconsiderstheconcept5G,5Gintegratedkeycapabilitiesandcoretechnology,5Gconceptby"importanttargets"and"agroupofkeytechnologies"toacommondefinition.Amongthem,theflagindicators"Gbpsrateuserexperience"isasetofkeytechnologies,includinglarge-scaleantennaarray,ultra-densenetworking,newmulti-site,full-spectrumaccessandnewnetworkarchitectures.
Recallingthecourseofdevelopmentofmobilecommunications,eachgenerationofmobilecommunicationsystemscanbedefinedbysexualperformanceindicatorsandsignsofkeytechnologies.Wherein,1GusingFDMA,onlyanalogvoiceservices;2GmainlyusingTDMA,canprovide
voiceandlow-speeddigitaldataservices;3GtoCDMAtechnologyischaracterizedbyuserpeakrateof2MbpstoreachtensofMbps,supportmultimediadataservices;4GOFDMAtechnologyasthecore,theuserpeakrateofupto100Mbps~1Gbps,cansupportavarietyofmobilebroadbanddataservices.
5Gkeycompetenciesricherthanpreviousgenerationsofmobilecommunications,userexperience,speed,densityofconnections,endtoenddelay,thepeakrateandmobilityandsowillbethe5Gkeyperformanceindicators.However,unlikethecaseinthepastonlytoemphasizedifferentpeakrate,theindustrygenerallybelievethattherateoftheuserexperienceisthemostimportantperformanceindicators,ittrulyreflectstherealdatarateavailabletotheuser,andtheuserexperienceistheclosestperformance.Basedonthetechnologyneedsofthemainscene5G,5GuserexperiencerateshouldreachGbpsmagnitude.
Facedwithdiversescenesofextremeperformancedemandsdifferentiation,5Gcannothavesolutionsforallscenarios.Inaddition,thecurrentwirelesstechnologyinnovationhasdiversifieddevelopmenttrend,inadditiontothenewmulti-accesstechnology,large-scaleantennaarray,ultra-densenetwork,thewholespectrumaccess,thenewnetworkarchitecture,alsoisconsideredtobethemaintechnicalcanplayakeyroleinthemajortechnologyscene.[5]
4.ChallengesandSolutions
InthispartIoutlinesomeobservedresearchchallengesanddirectionsinthemobilenetworkdevelopmentandshowsomemaybecomethefuturetrendsandsolutionsthatmayleadtoimprovednetworkperformancewhilemeetingtheconstantlyincreasinguserdemands.
5GTransportChallenge
Inordertounderstandthe5Gtransportchallengesonemustunderstandhow5Gmayevolvetheradioaccessthevariousinitiativesthatarelookinginto5G,wecandefines5Gintermsofscenarioswhichthenextgenerationwirelessaccessnetworkswillhavetosupport.[6]Atotaloffivefuturescenarioshavebeendefined,namelyamazinglyfast(userswanttoenjoyinstantaneousnetworkconnectivity),greatserviceinacrowd,ubiquitousthingscommunicating.,effectivesupporttoInternetofThings),superrealtimeandreliableconnections,andbestexperiencefollowsyou.Eachofthesescenariosintroducesachallenge.
Threeofthesechallenges.,veryhighdatarate,verydensecrowdsofusersandmobility)aremoretraditionalinthesensethattheyarerelatedtocontinuedenhancementofuserexperienceandsupportingincreasingtrafficvolumesandmobility.Twoemergingchallenges,verylowlatencyandverylowenergy,costandmassivenumberofdevices,areassociatedwiththeapplicationofwirelesscommunicationstonewareas.Future
applicationsmaybeassociatedwithoneorseveralofthesescenariosimposingdifferentchallengestothenetwork.InMETIStwelvespecifictestcasesweredefinedandmappedontothefivescenarios.Theselectedtestcasesessentiallysamplethespaceoffutureapplications.Oncetechnicalenablersthatfulfilltherequirementsforthesetestcasesaredefined,itisexpectedthatotherapplicationssubjecttothesamefundamentalchallenges,willsuccessfullybesupported.Asaconsequence,definingtechnicalenablersforthe5Gtestcasesmeansalsodefiningtechnicalsolutionstothe5Gchallenges.
WhileMETIS[7]isfocusedonwirelessaccess,thechallengesdefinedfor5Gareexpectedtoimpactalsothetransport.Supportforveryhighdatarateswillrequirebothhighercapacityradioaccessnodesaswe
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