ECPRI测试原理和测试方法.ppt

eCPRIPrimer BeReadytoParticipateintheConversation Rev AOctober2017 Basestationfunctionsareco locatedwiththeradiotoweratthebaseoftheantennaorbasementofatallbuilding Drawbacksofco location RFandBasebandProcessingareco locatedatthebaseofthetower Needstobephysicallylocatedveryclosetotheantennabecausetheyaredrivenoververylossyelectricalcables HighpowerdissipationrequirecostlyspecialenclosureswithclimatecontrolandpowerredundancyMakesitdifficulttoinstallandfindalocationthatcanhosttheenclosureand orincreaseleasepriceduetoadditionalspaceneeded TraditionalMacro cell InformationofVeEXInc 2 ElectricalCable CellSiteCabinet MobileBackhaul RF BB SeparationofRFandBasebandprocessing Simplifiedfunctionmakesitmorecompact easiertoinstallandthereforeincreasesthenumberofpossiblesitesFiberLinkreplacesCOALesspowerrequiredatthecellsiteLessprocessingandpowerrequirementsatthecellsiteSmallerfootprint easiertofindsitesFiberallowsgreatdistancebetweentheRRHandBBUlocation AllBBUslocatedattheCO CPRI OBSAI FronthaulNetwork InformationofVeEXInc 3 Fiber MobileBackhaul RF BB MobileFronthaul CPRI OBSAI MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 4 EvolutionofMobileFronthaul eCPRI WhyeCPRI CPRIrequireshighdatarateThisisnotscalablefor5GtrafficeCPRIisdesignedtomeettheneedsfor5GImprovesbandwidthefficiencyIncreasescapacityeCPRIusespacket basedtransportnetworkIPorEthernet eCPRIusespacketbasedtransportnetworkIPorEthernet usingaswitchedorroutedmobilefronthaulnetworkmakesitmoreflexibleeCPRIusesexistingstandardsforTransportNetworkLayer Ethernet IP Synchronization SyncE PTP C M SNMP EthernetOAM eCPRIintroducesafunctionalsplitforbasebandprocessingbetweenBBUandRRH TheFunctionalSplitdefinedintheprotocoladaptstotheapplication Itisatradeoffbetweenlatencyrequirementsandbandwidthreduction MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 5 HowdoeseCPRIachievethis FrontHaulEvolution InformationofVeEXInc 6 MobileBackhaul BBUPool CPRI OBSAIFronthaul RF RF RF BB BB BB BB MobileBackhaul BBUPool RF BB BB BB BB BB RF BB RF BB eCPRIFronthaul eRE eCPRIRadioEquipment RemoteRadioHead eREC eCPRIRadioEquipmentControler BasebandUnit 3dataflowsbetweenREandREC Synchronizationtraffic 1588PTP ControlandManagementTrafficUserPlanetraffic I Qsamples MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 7 eCPRIElements eRE eREC BBU Synchronization C MData UserPlanedata I Q RRH MobileFronthaulTransportNetwork eCPRIProtocolStack MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 8 EthernetPHY OptionalIP UDP eCPRIProtocol I QUserData eCPRIPhysicalLayer MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 9 ThefollowingEthernetinterfacesareallowedinthestandard HowiseCPRIdataFramed MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 10 Option1 eCPRIoverEthernet Option2 eCPRIoverIP UDP DestinationMAC SourceMAC Type AEFE EthernetPayload CRC eCPRIHeader eCPRIPayload I Qdataorcontroldata OptionalVLAN NeweCPRIEthertype MACHeader IPHeader UDPHeader EthernetPayload CRC eCPRIHeader eCPRIPayload I Qdataorcontroldata OptionalVLAN StandarddefineseCPRImessagesforOne WayDelayMeasurementbetweeneRE eRECeCPRIOne WayDelaymeasurementrequiresthatbothendsaretimesynchronizedtothesamesourceeCPRIOne WayDelayusesDelayrequest Follow upandDelayResponsemechanism MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 11 One WayDelayMeasurement MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 12 eCPRISynchronization eCPRInodearefrequencyandphasesynchronizedeRE eRECsynchronizationpathcanbedifferentfromdatapatheRE eRECsynchronizationfromPTP SyncEeREsynchronizationrequirementmorestrictthaneREC becauseeREgeneratesfrequencyforairtransmissionPTPSynchronizationperITU TTelecomProfile MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 13 eCPRISynchronizationTestingRequirements Source RequirementsfortheeCPRITransportNetwork DefinedintheeCPRITransportNetworkRequirementsshallmeetthefollowingthefollowingcriteria MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 14 TransportNetworkTestingRequirements RoEStandard IEEE1914 3CPRIencapsulatedintoEthernetInProcessofbeingstandardizedwithplanned2017releaseRoEtakesexistingCPRIframesandencapsulatesintoEthernetframesoralternativelytakesfrequencydomainI QdataandencapsulatesintoEthernetRoEiscompatiblewithexistingCPRIwhereaseCPRIisacompletelynewprotocolnotbackwardcompatiblewithCPRIPossiblyRoEandeCPRIwillcohabitRoEusedforexisting4G LTEdeploymentandeCPRIusedfornew5Gdeployments MobileFronthaulTesting Confidential ProprietaryInformationofVeEXInc 15 RoEvs eCPRI FriendsorCompetitors RXT 6200支持25GE CPRI10以及eCPRI的测试 全面满足5G承载网测试需求 MobileFronthaulTesting 16 VeEX公司eCPRI测试方案