DOCOMO_6G_White_PaperEN_20200124.docx

©2020NTTDOCOMO,INC.A1.1.RightsReserved.WhiteP叩er5GEvo1.utionand6GNTTDOCOMO,INC.January2020NTTdocomoTab1.eofContents1.Introduction22. DirectionofEvo1.ution"5GEvo1.utionand6G"32.1. Considerationsfor5Gevo1.ution32.2. Considerationsfor6G53. RequirementsandUseCases73.1. Extreme-high-speedandhigh-capacitycommunications73.2. Extremeverageextension83.3. Extreme-1.owpowerconsumptionandcostreduction83.4. Extreme-1.ow1.atency3.5. Extreme-re1.iab1.ecommunication3.6. Extreme-massiveconnectivity&sensing4. Techno1.ogica1.StudyAreas4.1. Newnetworktopo1.ogy4.2. Coverageextensioninc1.udingno-terrestrianetwork124.3. Frequencyextensionandimprovedspectrumuti1.ization134.4. Furtheradvancementofwire1.esstransmissiontechno1.ogies134.5. EnhancementforUR1.1.Candindustria1.IoTnetworks144.6. Expandedintegrationofvariab1.ewire1.esstechno1.ogies154.7. Mu1.ti-functiona1.izationandA1.foreverywhereinmobi1.enetwork155. Conc1.usionI6References161. IntroductionSincetheNipponTe1.egraphandTe1.ephonePub1.icCorporation(NTT)initiatedthewor1.d'sfirstce1.1.u1.armobi1.ecommunicationserviceinDecember1979,thetechno1.ogyofmobi1.ecommunicationshascontinuedtodeve1.opeverydecade,evo1.vingtonewgenerationsystems.WChtheprogressoftechno1.ogy,serviceshavecontinuedtoevo1.ve.Fromthefirstgeneration(1G)tothesendgeneration(2G).voiceca1.1.swerethemainmeansofcommunication,andsimp1.eemaiwaspossib1.e.However,femthethirdgeneration(3G).datacommunicationssuchasi-mode*andmu1.timediainformationsuchasphotos,music,andvideocou1.dbecommunicatedusingmobi1.edevices.Fromthefourthgeneration(4G),smartphoneshavebeenexp1.osive1.ypopu1.arizedbyhigh-speedcommunicationtechno1.ogyexceeding1OOMbpsusingthe1.ongTermEvo1.ution(1.TE).andaWigvarietyofmu1.timediacommunicationservershaveappeared.4Gtechno1.ogycontinuestoevo1.veintheformof1.TE-Advanced.andhasnowreachedamaximumcommunicationspeeddoseto1Gbps.NTTDOCOMOp1.anstoinitiateservicesbasedonthe1.fthgeneration(5G)mobi1.ecommunicationsystem11,whichisamoretechno1.ogica1.1.yadvancedsystem,inthespringo12020.5Gisexpectedtoproidenewva1.ueasabasictechno1.ogysupportingfutureindustryandsociety,a1.ongwithartificia1.inte1.1.igence(A1.)andtheInternetofThings(IoT).asWeMasfurtherupgradingofth©mu1.timediacommunicationserviceswithitstechnica1.featuresschashighspeed,highcapaty.tow1.atency,andmassiveectivityAsshowninFig,1-1.themobi1.ecommunicationsystemhasbeenevo1.vingtechnica1.1.yeverydecade,whi1.etheservicesofmobi1.ecommunicationshavechangedgreat1.yincyc1.esofapproximate1.y20years.Therefore,the"ThirdWave'initiatedby5GISexpectedtobecomea1.argerwavethrough5Gevo1.utionandthesixthgeneration(6G)techno1.ogy,andwi1.1.supportindustryandsocietyinthe2030s.ThiswhitepaperdescribesNTTDOCOMO'Scurrenttechnica1.prospectsfor5Gevo1.utionand6G.Chapter2discussesthedirect>onoffuturetechno1.ogica1.evo1.utionfromtheVieWPanISof5Gevo1.utionand6G.Chapter3describestherequirementsandusecases,andChapter4describestheprospectsoftechnica1.researchareas.Thiswhitepaperdescribesthecurrentthinking(asofJanuary2020).Basedothiscontent,Wewi1.1.promotediscussionsinvariousindustriesinajointindustry-academia-governmentapproach,andupdatethecoiet.Techno1.ogyevo1.ution(everyIOyears)5G6GTheFirstWaveITheSecondJMayfiV.",DisseminationofMobi1.ePhones1.Mobi1.eMu1.timedia"-u!Creatingnewva1.ueformarkets(every20years)Figure1-1.Evo1.utionoftechno1.ogiesandservicesinmobi1.ecommunications2. DirectionofEvo1.ution,5GEvo1.utionand6Gn2.1. Considerationsfor5Gevo1.utionThecommercia1.introductionof5Ghasa1.readybegunwor1.dwide.NTTDOCOMOstarted5GpreserviceinSeptember2019andisschedu1.edtostart5Gcommercia1.serviceinthespringof2020.However,sometechnica1.issuesandfurtherexpectationsthatneedtobeactua1.ized5Ghavea1.readybeenfound,andfurthertechotog>ca1.enhancementsntheformof5G©vo1.UbOnarenecessaryasweheadintothe2020s.Agure2-1showsthecurrenttechnica1.cha1.1.engesfacing5G.5Gisthefirstgenerationmobi1.ecommunicationsystemthatsupportshighfrequencybandssuchasthemi1.1.imeterwavebandthatexceeds10GHz,anditisatechno1.ogythatactua1.izesu1.tra-highspeedwire1.essdatacommunicationsofsevera1.gigabi1.spersecondusingafrequencybandwidthofsevera1.-hundredmegahertz,whichisremarkab1.ywiderthanthatachievedprevious1.y.However,thereismuchroomforfutureenhancementinmi1.1.imeterwavetechno1.ogyinmoMecommunications.Inparticu1.ar,improvingthecoverageandup1.inkperformanceinon1.ine-of-sight(N1.OS)environmentsareissuesthatcanbediscernedfrom5G-re1.atedtria1.s.5Ghasattractedmuchattentionasatechno1.ogythatsupponsfutureindustryandSOaeMandSpeoaJroquirGmQntSandhighperformanceparticu1.arareoftenrequiredinindustria1.usecases.InJapan,thediscussionof"1.oca1.5Gwhichspecia1.izesinindustryusecases,ison-goinganditisatopicofinterestinindustry2-1.Inthefuture,furtherenhancementof5Gtechno1.ogyWiHbenecessarytocorrespondf1.exib1.ytosuchwiderequirementsindustria1.usecasesIntheinitia1.5G.i.e.NRRe1.ease15.3GPPstandardizedradiote