2014.02.Samsung.lte B4G Standardization
description
Transcript of 2014.02.Samsung.lte B4G Standardization
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1EvolutionofLTETowardsB4GandBeyond
YongjunKwak,Ph.D.([email protected])
SamsungElectronicsCo.,Ltd.DigitalMediaandCommunicationsR&DCenter
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2Tableofcontents
3GPPStandardizationStatus
CandidateTechnologiesforB4GandBeyond DevicetoDevice(D2D)Communication FullDimensionMIMO(FDMIMO) CoMP withNonIdealBackhaul NetworkAssistedinterferenceCancelationandSuppression(NAICS) MillimeterWave(mmWave)Communication
ConcludingRemarks
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33GPPStandardizationStatus
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43rd GenerationPartnershipProject InitiatedinDecember,1998fordevelopmentofwirelesscommunicationstandards
Collaborationbetweengroupsoftelecommunicationsassociations China:CCSA(ChinaCommunicationsStandardsAssociation) Europe:ETSI(EuropeanTelecommunicationsStandardsInstitute) Japan:ARIB(AssociationofRadioIndustriesandBusinesses),TTC(TelecommunicationTechnologyCommittee) Korea:TTA(TelecommunicationsTechnologyAssociation) USA:ATIS(AllianceforTelecommunicationsIndustrySolutions)
SpecificationworkdoneinTechnicalSpecificationGroups GERAN(GSM/EDGERadioAccessNetwork):GERANspecifiesGSMradiotechnology,includingGPRSandEDGE RAN (RadioAccessNetwork):RANspecifiestheUTRAN andthe EUTRAN SA (ServiceandSystemAspects):SAspecifiesservicerequirementsandoverallarchitectureof3GPPsystem CT (CoreNetworkandTerminals):CTspecifiesthecorenetworkandterminalpartsof3GPP
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WCDMA(1999)
WCDMA(1999)
HSDPA(2002)HSDPA(2002)
HSUPA(2005)HSUPA(2005)
LTE(2008)LTE
(2008)LTEA(2010)LTEA(2010)
B4G(2014)B4G(2014) 5G5G
CDMA,QPSK DL:16QAMAMC,HARQ
UL:AMC,HARQ DL:OFDMA,MIMOUL:SCFDMA
CoMP,CA,eICICUL:MIMO
backwardcompatible backwardcompatible
Rel99 Rel5 Rel6 Rel8 Rel10
Smallcells,FDMIMO
backwardcompatible?
Rel12
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5IndustryParticipationin3GPP Over100companiesinvolvedinLTEspecificationdevelopment
MobileVendors:Samsung,Nokia,Blackberry,LGE,ZTE,Pantech,Motorola,HTC,Apple, SystemVendors:Ericsson,Huawei,AlcatelLucent,NokiaSiemensNetwork, ChipsetVendors:Qualcomm,Intel,MediaTek,Broadcom,NVIDIA, ServiceOperators:CMCC,Vodafone,Orange,Verizon,AT&T,KDDI,Sprint,Deutsche
Telekom,KoreaTelecom,SKTelecom,NTTDOCOMO,TelecomItalia,Softbank, MeasurementInstrumentVendors:AgilentTechnology,NI,Rohde&Schwarz, TerminalLocationProviders:TruePosition,PolarisWireless,.. ResearchFirms:InterDigital,ETRI,ITRI,III,
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6LTERelease8:FirstLTESpecification
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10ms radio frame, Tf
#1 #2 #3 #4 #5 #6 #7 #8 #9Subframe
Slot, Tslot 0.5 msec
1msec
#0
Resource Block (RB) Resource element
(k,l)
l=0 l=NsymbDL-1
Symbol
Subcarrier15kHz
k = nPRB*NSCRB
4x4DLMIMO
OFDMA/SCFDMA:1.4MHz 20MHz FlatRANarchitectureK
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Requirements Target
Peak transmissionrate(Mbps) >100 (DL),>50(UL)
Peakspectralefficiency(bps/Hz) >5(DL),>2.5(UL)
Average cellspectralefficiency(bps/Hz/cell) >1.62.1(DL),>0.661.0(UL)
Celledgespectralefficiency(bps/Hz/user) >0.040.06 (DL),>0.020.03(UL)
Userplanelatency/Control planelatency(ms)
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7LTERelease10:LTEAdvanced(LTEA)
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K
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CarrierAggregation
8x8DLMIMO
4x4ULMIMO
TimedomainIntercellInterferenceCoordination
Cellrangeexpansion
AlmostBlankSubframe
Requirement Target
Peak transmissionrate(Mbps) 1000 (DL),500(UL)
Peakspectralefficiency(bps/Hz) 30(DL),15(UL)
Average cellspectralefficiency(bps/Hz/cell) 2.43.7(DL),1.22.0(UL)
Celledgespectralefficiency(bps/Hz/user) 0.070.12 (DL),0.040.07(UL)
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8LTERelease11:NetworkCoordinationforLTE
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KeyTechnology:CoMP (CoordinatedMultiPointTransmissionandReception) Allowsnetworktocoordinatewirelessresources(time,frequency,transmissionpower,etc) Significantimprovementinsystemperformance(Average:20~30%,Edge:30~40%) WellsuitedforCRAN(CentralizedRadioAccessNetwork)
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9OngoingLTEEnhancement
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LTERoadmap
1H 2H 1H 2H 1H 2H 1H 2H 1H 2H 1H 2H
2011 2012 2013 2014 2015 2016
Release11(LTEA)
Release12(Beyond4G)
Release13(Beyond4G)
2011.09
Stage1 Stage3 ASN.1Freeze
2011.03
Stage1Rel12andonwardsWS
2012.62014.06
Stage3 ASN.1Freeze
2014.09
2012.09 2013.03
Release14(5G)
1H 2H
2017
ProjectedcompletionofR13
ProjectedcompletionofR14
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CandidateTechnologiesforB4GandBeyond
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DevicetoDeviceCommunication
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DevicetoDevice(D2D)Overview Cellularcommunication
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DevicetoDevice(D2D)Overview Directcommunicationbetweendevices
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D2DTechniques WifiDirect
Targetusecase:peertopeerconnectivity Usingunlicensedband(2.4GHz,5GHz)basedonWifi Currentlyused(standardizationcompleted)
D2Dproximitybasedservice(D2DProSe)inLTE Targetusecase:Discoverybasedproximityservice(Advertisement,SNS,etc) Usinglicensedband(*850MHz1,3,900MHz2,1800MHz1,2,2100MHz3)basedonLTE Currentlystandardizedin3GPP
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*(1:SKTelecom,2:KT,3:LGUplus)
WifiDirectusecases
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WifiDirectvs.D2DProSe
WifiDirect:twostepdiscovery Devicediscovery:broadcastrequest
followedbyunicastresponse Servicediscovery:Inquestrequest
followedbyunicastresponse
LTEProSe:onestepdiscovery Devicebroadcastitsdiscoveryand
serviceinformationtogether Fasterdiscoverywithlowpower
consumption
Step 1 device discovery
Device & service discovery in one stepStep 2 service discovery
WifiDirectvs.D2DProSe
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Delay Longdiscoveringtimeforservicediscovery
Scalability Thenumberofconnecteddevicesislimited.
Range Smallrange(lessthan100meter)
PowerConsumption Asynchronouscarriersensingprotocol
Interference Lowreliabilityoftheradiolink
LimitationofWifidirectWifiDirectvs.D2DProSe
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D2DProse:ComponentTechniques
Peerdiscovery UEdiscoversotherUEsproximatetoitself Mainly forcommercialusecase
Directcommunication UEtransmitsdatatootherUE(s)withnetwork
assistanceinsidenetworkcoverage BroadcastcommunicationisstudiedinRel12
Outofnetworkcoverage D2Dcommunicationshouldalsobesupportedin
outofnetworkcoverage Keyfeatureforpublicsafetyusecase
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D2DDiscovery:Physicaldesign
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Designprinciple Type1discovery
NetworkconfiguresresourcepoolsforD2Ddiscovery D2DUErandomlyselectsaresourceinsidetheresourcepoolforthetransmissionD2D
UEtriestoreceivemultiplediscoverysignalsinsidetheresourcepool Type2discovery
NetworkallocatesaUEwheretotransmititsdiscovery
Resource pool for D2D discovery
WAN data WAN data WAN data
... ...
... ...
Resource pool for D2D discovery
Resource pool for D2D discovery
P
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subframes
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D2DDiscovery:Possiblescenario
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D2DDirectcommunication:Synchronization
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Synchronizationprocedure IfnosynchronizationsourceisdetectedbyaUE,aUEmaytransmitD2DSS(D2D
syncSignal) D2DSSrelayingisconsidered UEsynchronizeitsreceivertothedetectedD2DSStransmittedfromasyncsource UEdetectsasyncsourceasfollows
ENBsynchronizationhasthehighestpriorityasasyncsourceforD2DUEs SynchronizationsourceswhichareUEswithinnetworkcoveragehaveahigherpriority
thansynchronizationsourceswhichareUEsoutsidenetworkcoverage
CelleNB
D2DUE3:IndependentSyncsource
cluster
D2DUE1
D2DUE2
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D2DDirectcommunication:Datascheduling
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Cell
eNB
clusterUE1
UE5
UE3UE4
Tx
RxTx Rx
UE2
Tx
Rx
UE6Rx
SchedulingD2DData(Broadcast)
Resourceallocationprocedure Mode1:eNB schedulestheexactresourcesusedbyaUEtotransmitdirectdata
Mainlyusedforinsidenetworkcoverage Mode2:atransmittingUEonitsownselectsresourcestotransmitdirectdata
Mainlyusedforoutofnetworkcoverage Tobediscussedin3GPPhowtoscheduleforpartialcoveragecase
Mode1resourceallocation
Mode2resourceallocation
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FullDimensionMIMO
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FullDimensionMIMO(FDMIMO)Concept Utilizationoftwodimensionalantennaarray
Allowsflexiblebeamforminginbothazimuthandelevationdomain HighorderMUMIMO
SimultaneoustransmissiontolargenumberofUEs
4xCPRI
IP network
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2DimensionalBeamforming Example1:70/70degreeswithoutdowntilt
Example2:70/40degreeswithout30degreesdowntilt
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28antennas 48antennas 88antennas
28antennas 48antennas 88antennas
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1DimensionalArray(64x1):dH =0.5
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902 701
100
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110
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MUinterferencevirtuallynonexistentusing64antennahorizontalbeamforming
At700MHz,64antennaswithhalflambdaspacingis15mlong!
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2DimensionalPlane(8x8):dH =0.5,dV =0.5
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Azimuth
Elevation
LowMUinterferencefromhorizontalbeamforming
HighMUinterferencefromverticalbeamforming
701 902
1001 1102
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2DimensionalPlane(8x8):dH =0.5,dV =4
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701 902
1001 1102
AzimuthLowMUinterferencefromhorizontalbeamforming
ElevationLowMUinterferencefromverticalbeamforming
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FDMIMOStandardizationStatus
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Newscenarios Newchannelmodel
Newantennamodel NewpathlossandLOSprobabilitymodel Simplifiedmodel Elementgeneratedmodel Example:10 vs.M=8elementpatternforverticaldomain
TR36.814 NewModel
1
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Scattersinverticaldomain
CorrelationforLSparameter
DSDS
K
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ASD
ASA
K SF ASD ASA1
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DS K SF ASD ASA ESD ESADS
K
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ASD
ASA
ESD
ESA
TX
RXASD
ASAESD
ESA
Scatter
PathlossgainforhighriseUE LOSprob.ofhighriseUE
PL=PLOS(HUT)
PL=PNLOS(HUT=1.5m)Heightgain=a(HUT1.5)
UMi (Urbanmicro) UMa (Urbanmacro)
Highrisescenario Stadium,mall,airport
6~8floors
10m
TX
6~8floors25m
20floors
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FDMIMOSystemLevelSimulation SimulationSetup:
Twotier57sectors
K=10~30UEspersector
Centerfrequency2GHz,bandwidth10MHz
UEspeed3km/huniformlydistributed
UE:2Rx,1Tx
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NT-V
NT-H NT-H
NT-V
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Element gain- 3dB BW-V:90 degree- 3dB BW-H:90 degree- Peak gain: 6.4dBi
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FDMIMOEvaluationResults(1/3) Performancewithminimumspacingofhalfortwobetweenelements
NT =NV xNH=8,16,32,64antennaelements With2spacinginverticaldomain,achieve57%gainoverhalfspacing Metric:AverageCellthroughput(bps/Hz)
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(V/H)=(0.5/0.5)spacing (V/H)=(0.5/2)spacing
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CoMP withNonIdealBackhaul
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IntereNB CoMP withNonIdealBackhaul
Release11CoMP Release12CoMPNIB
Focusesonairinterfaceaspectonly ReliesonproprietaryinterfacebetweeneNBs
Notdesignedforrobustperformanceinnetworkswithnonidealbackhaul
ShouldsupportnetworkinterfaceforintereNB coordination SupportcoordinationamongeNBs ofdifferentvendors
Designtoproviderobustperformanceeveninnetworkswithnonidealbackhaul
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CentralizedSchedulingBetweeneNBs Stage1:Resourcecoordination
CentralresourcecoordinatordecideswhichTPgetswhichfrequency/timeresource Relativelyrobustagainstbackhaullatency
Stage2:UEselectionandlinkadaptation ConveysresourcecoordinationresulttoTPs
EachTPisnotifiedofitsownresourceallocationandthoseofneighboringTPs
EachTPrunschannelopportunisticschedulerbasedonlatestCSIfromUEs
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UEsreportsCSItoeNB
eNBs forwardCSItoresourcecoordinator
ResourcecoordinatordecideswhicheNB gets
whichresource ResourcecoordinatornotifiesresourceallocationtoeNBs
eNBs useslatestCSIandresourcecoordinationofothereNBs toperformscheduling
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TwoStageResourceAllocation Stage1:Resourcecoordination
CentralresourcecoordinatordecideswhichTPgetswhichfrequency/timeresource Relativelyrobustagainstbackhaullatency
Stage2:UEselectionandlinkadaptation ConveysresourcecoordinationresulttoTPs
EachTPisnotifiedofitsownresourceallocationandthoseofneighboringTPs
EachTPrunschannelopportunisticschedulerbasedonlatestCSIfromUEs
Impactoftimedelay Resourcecoordination:lesssensitive canhandlelargertimedelays UEselectionandlinkadaptation:moresensitive largeperformancedegradation
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IntereNB CoMP EvaluationResults Coordinationsize:N cells
2N1ON/OFFcombinationsconsidered Lefttableconsiders7combinations
ResourcecoordinatorselectsON/OFFcombinationwithbestmetric
Resourcecoordinatorinformseachcellsschedulerofresourceallocation
Cell2:noresourceassigned Cell1:resourceassigned Cell3:resourceassigned
Resourcecoordinatorinformseachcellsschedulerofinterferingcells
Cell2: Cell1:notifiedthatCell3isinterfering Cell3:notifiedthatCell1isinterfering
EachcellsschedulerselectsUEsandadjustsMCSlevelaccordingtointerferingcell(s)
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Cell1 Cell2 Cell3 SumRate
Alt1ON/OFF ON ON ON
5Rate 2 1 2
Alt 2ON/OFF ON ON OFF
4.8(0.2)Rate 2.3(0.3) 2.5(1.5)
Alt 3ON/OFF ON OFF ON
6.5(1.5)Rate 3.5(1.5) 3(1)
Alt 4ON/OFF ON OFF OFF
4(1)Rate 4(2)
Alt 5ON/OFF OFF ON ON
5.5 (0.5)Rate 2.5(1.5) 3(1)
Alt 6ON/OFF OFF ON OFF
4(1)Rate 4(3)
Alt 7ON/OFF OFF OFF ON
4.5(0.5)Rate 4.5(2.5)
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NetworkAssistedInterferenceCancellationandSuppression
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NetworkAssistedInterferenceCancellation/Suppression Advancedreceiversforterminals
Canboostsystemperformanceandenduserexperience
Requireshighlycomplexterminalimplementation
NAICS(NetworkAssistedInterferenceCancellation/Suppression) Networkprovidesinformationoninterferencetoterminal
Basedonnetworkinformation,terminalappliesadvancedreceiver
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NAICSforintercellinterference NAICSforintracellinterference
CellA&CellBexchangeinfoonPDSCHA &PDSCHB Infooninterferenceisforwardedtoterminals Intercellinterferencecancellation/suppression
InfoonPDSCHA &PDSCHB areavailableateNB Noneedforinformationexchange
InfooninterferenceisforwardedtoterminalsMUMIMOinterferencecancellation/suppression
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NAICSEvaluationResults Jointsymbollevelreducedmaximumlikelihoodreceiver
Inputtoturbodecoderiscalculatedassumingknowledgeofinterferencemodulation Randominterferenceofadiscreteconstellation(QPSK,16QAM,64QAM,etc)
LLRcalculationisdoneassuminginterferenceofadiscreteconstellation ComparedtoazeromeanGaussiandistribution
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IsInmS
IsInmS
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LLR
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MeanPacketRate(bps/Hz) PacketRate@5%tile(bps/Hz) PacketRate@50%tile(bps/Hz)
MMSEIRC 1.66 0.0% 0.26 0.0% 1.23 0.0%RML 1.82 9.4% 0.30 17.0% 1.42 15.4%
MeanPacketRate(bps/Hz) PacketRate@5%tile(bps/Hz) PacketRate@50%tile(bps/Hz)
MMSEIRC 1.10 0.0% 0.12 0.0% 0.71 0.0%RML 1.31 19.0% 0.17 32.5% 0.92 28.8%
Simulationresults@60%RUforNAICSscenario1
Simulationresults@40%RUforNAICSscenario1
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MillimeterWaveCommunication
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SpectrumCandidates Requirement:LargeChunksofContiguousSpectrum
Examples:13.4~14GHz,18.1~18.6GHz,27~29.5GHz,38~39.5GHz,etc.
EESS(EarthExplorationSatelliteService)FSS(FixedSatelliteService)RL(RadioLocation service),MS(MobileService)FS(FixedService)PP(PointtoPoint)LMDS(LocalMultipointDistributionServices)
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FriisEquationinFreeSpace(1/2)
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FriisEquationinFreeSpace(2/2)
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PrototypeformmWave Beamforming SamsungsdemosystemformmWave mobiletechnology
Adaptiveantennaarraytechnology Evaluatedinoutdoorenvironment
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CarrierFrequency 27.925GHz
Bandwidth 500MHz
Max.Tx Power 37dBm
Beamwidth (HalfPower) 10o
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TestResults Range OutdoorLineofSight(LoS)rangetest
Errorfreecommunicationpossibleat1.7kmwith>10dBTx powerheadroom
PencilBFbothattransmitterandreceiverenableslongrangecommunication
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TestResults Mobility OutdoorNonLineofSight(NLoS)mobilitytests
Adaptivejointbeamformingandtrackingeffectiveat8km/hmobilityeveninNLOS
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TestResults BuildingPenetration OutdoortoIndoorpenetrationtests
MosttransmissionssuccessfullyreceivedbyanindoorMSfromanoutdoorBS Successfulpenetrationoftransmissionsthroughtintedglassesanddoors
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ConcludingRemarks
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EvolutionTowardsB4GandBeyond Wirelessstandardshaveevolvedthroughouttheyears
1G(AMPS) 2G(GSM,IS95) 3G(WCDMA,cdma2000) 4G(LTE,Wibro)
Witheachgenerationcamenewfeaturesandcapabilities 1G 2G(1990s):Analog Digital(10kbps) 2G 3G(~2000):higherthan200kbps,CDMA 3G 4G(~2010):higherthan1Gbps,OFDMA,MIMO 4G B4G(~2015):FDMIMO,smallcellenhancement,D2D B4G 5G:?
B4Gand5Gevolutionwillbringinyetanothersetoffeatures Tohandleexplosionofwirelesstraffic
Tobemorecosteffective
Tohandledifferentservices,communicationscenarios,devices
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