EXECUTIVEBRIEF SUCCESSFULDEPLOYMENT OFREMOTEPHY EvolvingtheNetworktoIncrease BandwidthandReducePower andspacerequirements
/arriseverywhere SUCCESSFULDEPLOYMENTOFREMOTEPHY EvolvingtheNetworktoIncreaseBandwidth andreducepowerandspacerequirements Todealwithrapidgrowthinbandwidthdemand,Operatorsmustembracenewtechnologiesand architecturesthatsupplythedesiredcapacity,aswelasdeliverhigherdataspeedsandoperationalcost savings.manyareadoptingdocsis3.1anddistributedaccessarchitecturestoupdatetheirnetwork infrastructure.however,theyalneedtodeterminewhichcombinationofadjustmentswilbestmeettheir subscriberdemandoverthenextfiveto10years.asonepioneeringdanishcableoperatorhasdiscovered, RemotePHY(R-PHY)canbeakeyingredientinthetransformationrequiredtobuildamoreefficient, scalable,cost-effectivenetwork. scalable,cost-effectivenetwork. NIELSON SLAW OFINTERNETBANDWIDTH (GrowthRate=50%/Year) 300bpsDS 1982 6KbpsUS 56KbpsDS 100KbpsUS 2002 1MbpsDS 2002 1MbpsUS 10MbpsDS 10MbpsUS 2013 100MbpsDS 2013 35MbpsUS 2016 1GbpsDS 2016 DOWNSTREAM UPSTREAM EraofSymmetrical Services ExtendedSpectrum DOCSISw/FDX FDX DOCSIS3.1 2Gbps 2019 20Gbps 2014 100Gbps 2026 200Gbps 2030 10Gbps 2021 100Gbps 10Gbps 1Gbps 100Mbps 10Mbps 1Mbps 100Kbps 100Kbps 10Kbps 1Kbps 100bps 1982 1983 1984 1985 1986 1987 1988 1988 1989 1990 1991 1992 1993 1994 1996 1996 1997 1998 1999 2000 2001 2001 2002 2003 2004 2005 2006 2007 2009 2010 2011 2012 2013 2014 2015 2015 2016 2017 2018 2019 2020 2021 2022 2022 2023 2024 2025 2026 2027 2028 2029 2029 2030 2031 2032 EXECUTIVEBRIEF
WhyRemotePHY? DistributedAccessArchitecture(DAA)isanevolutionarystepinextendinghigh-performancefiber connectionsclosertothesubscriberhome.r-phyisatechniqueforseparatingtheqam modulation/ demodulationportionofthetraditionalintegratedcmtsorccapandmovingittotheendofthenetwork. Shiftingthesecomponentstothenodestructure,closertothesubscriber,dramaticalyboostssignal performanceandreducesspaceandpowerrequirementsattheheadend.byupgradingtoaremotephy network,whileleveragingdaaanddocsis3.1,whichdeliversbeterspectralefficienciesandwiderchannels forboththedownstream andupstream,operatorscanincreasebandwidthsupplyandimprovecost-efficiency. Morebandwidth,smalerspace,lesspower TheadvantagesofRemotePHYstartwithtransitioningfrom analogsignalstodigitalopticsonthefiber network.digitalfibersdonotrequirefrequenttuningandadjustments,anddigitaltransmissionproduces morebandwidthfrom anexistingfibernetwork.movingrfsignalprocessingfrom theheadendtothenode eliminatessignaldegradationinherentintransmissionoveram fiber,thusboostingthesignal-to-noiseratio forbetersignalqualityattheend-of-line.theimprovedsnralowsdocsis3.1topushmoredatathrough thesameamountofrfspectrum,andwithoutchanging"lastmile"wiring.bandwidthcapacityonexisting hybridfibercoax(hfc)networksjumpsfrom 0.1Gbpsto1.0-2.0Gbpsintheupstream directionandfrom 1Gbpsto10Gbpsgoingdownstream. Bymovingfunctionalityout,R-PHYnetworksalsogreatlyreduceheadendandhubspace,aswelaspower requirements,generatingsubstantialsavingsonfacilitymaintenance.also,becauser-phydigitalfibershave fewerdistancelimitations,theheadend/hubcanbemoreremotefrom thenodeandsubscriber,openingup opportunitiesforhubconsolidation.centralizingmaccorefunctionalityindatacenterscandramaticaly simplifyoperationsbyreducingthenumberofdevicestobemanaged,andbyaddingautomation. Stofa sgroundbreakingjourneytoefficientlydelivermorebandwidth OneofthefirstRemotePHYdeploymentsintheworldwasperformedbyStofa,Denmark'ssecond-biggest provideroftelevision,broadbandandtelephony.thedanishoperatordeliversbroadbandtomorethan 500,000households,withservicesincludinghigh-speeddata,voiceandQAM video.in2016,stofalaunched aprojecttoplananetworkupgradethatwouldalowittostayaheadofitsforecastedsubscriberbandwidth 2 /arriseverywhere
demandcurve.stofachosearrisasapartnerfortechnology,planning,networkdesignandproduct deployment. Priortothenetworkupgradeproject,Stofa smodulararchitectureplacedcmtsintheheadendandthe associatedeqamsattheantennafacilitieslocation.benefitsoftheupgradeincluded: LeveragingDOCSIS3.1toincreasecapacityinboththeupstream andthedownstream directions. Transitioningtodigitalfiberwoulddrivebeterutilizationbymultiplexingmanynodesontothesame existingfiber. UsingtheIPprotocolontopofdigitalfibertoenabledynamicsharingoftrafficacrossfibers.Reaching ahighermodulationorderwouldincreasetheamountofspectrum availableforservices. Easingspaceandpowerrequirementsathubandheadendlocations. EnablingStofatoproactivelymanagenetworkfunctions. GetingthenetworkarchitecturejustrightusingRemotePHY AfteritwasdecidedtoconvergealDOCSIS,VODandbroadcastcustomerservicesontooneplatform,the team sfocusshiftedtocraftingadesignthatwouldbringthebenefitsofremotephytothenetwork.al serviceswouldbeprocessedbythemaccoreandtransmitedoverdigitalfibertother-phynode. Convergencewouldcreateoperationalsimplicitybasedonaunifieddatapathforalservices. Afterinitialtesting,theteam launchedalimitedfieldtrialtolearnmoreaboutitsabilitytoconvergedocsis andvodvideoservicesovertheremotephyarchitecture.usingpre-productionsoftware,thelabandfield trialsencounteredveryfewissues,whilegivingtheengineeringandoperationsteamsvaluableexperience withservicesconfiguration,monitoringanddebugging. AnatomyofasuccessfulR-PHYdeployment StofacapturedRFsignaldatabeforeandafterthedeployment.Upstream noisedatacolectedatther-phy nodeshowedanaverage2.5dbimprovementinsnr withupto8.2dbimprovementinsomeareas.this resultclearsthewayforstofatogotohigherdocsis3.1modulationsinthefuture,whichwilprovide increasedupstream capacitytosubscribersforfasteruploadspeeds. 3 /arriseverywhere
Asidefrom increasingcapacity,ther-phydeploymentenabledstofatorecognizespaceandpowersavings intheheadendwiththepotentialforfacilitiesconsolidationinthefuture.stofa sbefore-and-aftercomparison of96servicegroupsrevealedthatmovingphyprocessingoutoftheheadendreducedthenumberofrack unitsrequiredbyabouttwothirds,from 64inthelegacyarchitectureto19.Powerdemanddecreasedby twotimes,droppingfrom 7,950W inthelegacyarchitectureto3,485w forremotephy. CentralizedmanagementmadetheoperationofthenewarchitecturesignificantlyeasiercomparedtoStofa s previousnetwork.thenumberofmanagedheadenddevicesneededtosupport200servicegroupsdropped from eighttofour(onemaccore,twotimingserversandoneaggregationrouter),radicalysimplifying operations.asingleprovisioninginterfaceforthemaccorenowalowsadministratorstoeasilyperform changesintheprovisioningsystem andbackofficetools.therearefewerinteroperabilityissuesand,with feweripaddressesneeded,thestofateam cankeepasmalerinventorytodealwithoutages. R-PHYhascreatedapathtowardvirtualizingfunctionsandcentralizingthem indatacenters.futureexpansion ofstofa snetworkcanbeaccomplishedbyaddinglicensesaspartofregularnetworkupgradecyclesandby performingconfigurationchangesremotelyratherthansendingtechnicianstothefield. Majortakeawaysfrom Stofa sexperience TheStofadeploymentoffersseveralvaluablebestpracticeswhenupgradingtoR-PHY: Starttestingearly.Becomefamiliarwiththeproductandarchitectureasearlyaspossible. Planahead.Establishingthelabandfieldqualificationprocessearlygivestechniciansandnetworkengineers timetofigureouttheirneedstosupporttheeffort.layingoutthedeploymentphaseshelpsuncover migrationchalengesandoperationalissuesbeforetheycanimpedetherolout. DedicateresourcestoCIN networkandtimingarchitecture.assignresourcesthathavetheright experienceandskilsetstoplantheseaspectsofthenetwork. Startslowly.Aim foragradualmigrationthatalocatessufficienttimeforcapturingprocessglitchesand technicalissues.startyourfielddeploymentwithonenode,thengradualyincreasethescaletofuldeployment. Automate.Makingsignificantchangestothenetworkinfrastructurepresentsanopportunitytoautomate moreprocessesandmakethedeploymentteam aswelasthemaintenanceandsupportteamsmore productiveinthelongterm. 4 /arriseverywhere
Makeitapartnership.Betransparentwithyourequipmentvendor.Weeklymeetingsbetweenintegration teamswilaloweveryonetoreactquicklywhenroadblocksareencounteredandcreateeffectiveworkarounds together. Conclusion EvolvingthenetworkwithaRemotePHYapproachcanprovideimmediatevaluebyincreasingbandwidth capacity,whilereducingcostsassociatedwithoperations,powerandcooling.operatorscanmoreefficiently meetsubscriberdemandformorebandwidth,aswelasbeinapositiontoeasilyexpandtheservicesthey deliverinthefuture. Formoreinformation,pleasevisit. 5 /arriseverywhere