[Type text] [Type text] [Type text] C band spectrum STA extension at Ericsson Plano, Texas Report 2020-10-29 Uen Rev A FCC Experimental Application File Number: 0928-EX-CN-2020
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CbandspectrumSTAextensionatEricssonPlano,Texas
Report
2020-10-29 UenRevA
FCCExperimentalApplicationFileNumber:0928-EX-CN-2020
FCCFILE#:0928-EX-CN-2020
2020-10-29 UenRevA ©EricssonAB2020 2(6)
CommercialinConfidence
Contents
1 Introduction..................................................................................................3
2 Setupoverview.............................................................................................32.1 Interferencetestingandmitigationsetup...........................................32.2 AdvancedMassiveMIMOfunctionalitytesting...................................5
3 Accomplishmentsandplanahead.................................................................6
FCCFILE#:0928-EX-CN-2020
2020-10-29 UenRevA ©EricssonAB2020 3(6)
CommercialinConfidence
1 Introduction
WiththeupcomingCbandspectrumauctionsplannedbyFCC,thereislotofinterestintheindustrytostudythespectrumforeffectiveutilization.SuccesswithCbandspectrumutilizationfor5GiscriticalforUSleadershipinthecritical5Gcommunicationsegment.
CbandspectrumauctionisexpectedtobemadeavailableintwophasesfortheCellularServiceProviders(CSPs)asshowninthefigurebelow:
Figure1:CbandspectrumauctionphasesandexampleofPh-1deployment
Thechallengewithphase1isthatFSSproviderswouldstillbeoperatingbetween3820MHz–4000MHzanditisimportanttoprotecttheFSSoperationfrominterferencefromCSPs
EricssonhassetupatestingandverificationfacilityinthePlano,TexascampusprimarilyfocusingonthePhase1coexistenceofCSPandFSSoperation.
Inadditiontotheinterferencemitigationsolutiontestingandverification,itisalsocriticalforCSPstobeabletoefficientlyusethevaluablespectrumandprovideexcellent5Gservicestoconsumerandenterprise.Ericsson,Plano–TXsetupisalsobeingusedforverificationofinnovativefeaturesandfunctionalitiesthatwouldprovidehighcapacityandperformancefortheendusersofCSPs.
2 Setupoverview
2.1 Interferencetestingandmitigationsetup
EricssonhassetupaCbandtestingzoneinthePlanocampuswithtwositesasshowninthepicturebelow:
FCCFILE#:0928-EX-CN-2020
2020-10-29 UenRevA ©EricssonAB2020 4(6)
CommercialinConfidence
Figure2:CbandcoverageoverviewatEricssonPlanocampus
ForevaluatingtheFSSinterferencemeasurementperFCCguidelines,EricssonhassetupatestingsolutioncomprisingofaCbanddishantennaalongwithrelevantfeedhorn,waveguidefilter,LowNoiseAmplifier(LNA)etc.Thedishantennaismountedonatrailerwhichcanbepulledtodifferentlocationsformeasurements
Figure3:Cbanddishantennasetupforinterferencemeasurement
Thevanisequippedwithsignalgenerator,spectrumanalyzertocapturethemeasurementsreceivedsignalandinterference:
FCCFILE#:0928-EX-CN-2020
2020-10-29 UenRevA ©EricssonAB2020 5(6)
CommercialinConfidence
Figure4:Interferencemeasurementsetupinsidethevan
2.2 AdvancedMassiveMIMOfunctionalitytesting
The2ndCbandradioinstalledinPlanocampusisusedfortesting,developmentanddemonstrationofadvancedmassiveMIMOfunctionalityforCband.SomeoftheadvancedfunctionalitiesalreadytestedanddemonstratedasSRSbasedMulti-UserMIMO(MU-MIMO).Thisfeatureallowsextremesystemcapacityandveryefficientutilizationofpreciousmid-bandTDDspectrum.Weareabletoreachthespectralefficiencyofnearly54bits/Hz.
Figure5:MU-MIMOtestinginPlanowith8devices
FCCFILE#:0928-EX-CN-2020
2020-10-29 UenRevA ©EricssonAB2020 6(6)
CommercialinConfidence
Figure6:MU-MIMOtestingresultsinPlano
3 Accomplishmentsandplanahead
EricssonhasalreadymadesignificantprogresstowardscharacterizingaCbandnetworkanditscoexistencechallengeswithCbandsatelliteoperation.TheresultsandlearningfromthemeasurementsdoneinPlanoisbeingusedfornetworksimulationandplanningactivities.Thelearningsarealsobeingfedbacktothedevelopmentunitforfurtherimprovementandoptimizationofthesolution.
Ericssonplanstousethesetupin2021tocontinuetestingnewandinnovativefeaturesforCbandsatelliteinterferencemitigationsolutionswhichwouldbeessentialforthesuccessof5GinUS.
Inadditiontotheabove-mentionedinterferencetesting,thetestspectrumwouldalsobeusedfordevelopmentandtestingofnewusecasesin5G,suchaslowlatencyusecases.
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