EPC基础知识介绍

EPC基础知识介绍1.EPC网络介绍1.1浅看GPRS网络结构（GSM接入）gprs_gsm.pdf1.2EPC网络结构epc.pdf1.3PCN网络结构pcn.pdf1.4GPRS网络接口gprs_interface.pdf1.5EPC网络接口epc_interface.pdf1.6附着流程AttachProcedure.pdf2.MME2.1硬件SGSN-MMEMkVIIICabinet,3-Magazines.pdfMkVIIIMagazine,FrontView.pdfMkVIIIMagazine,SideView.pdf2.2背板BackplaneConnectors.pdfPowerdistributiontoallslots1GbEconnectionstoeachslotfromtheSystemControlSwitchBoards(SCXBs)10GbEconnectionstoslot1–24fromtheComponentMainSwitchBoards(CMXBs)Slotpositions1–24useGEP3PIUsthatusetwoslotseach.2.3PIU(plug-inunit)CMXB3-ComponentMainSwitchBoard,version3.APIUwith10GigabitEthernetLayer2switchingusedforexternalconnectivityandinterconnectbetweenEGEMs.TheCMXBhasloadbalancingonIPportlevel.SCXB2-SystemControlSwitchBoard,version2.APIUwith1GigabitEthernetLayer2andLayer3switchingusedforexternal,andinternalconnectivitybetweenPIUsinthesamemagazine.GEP3-24GB-GenericEricssonProcessor,version3.APIUwithamulticoreCPUusedforgenericprocessing.Itmayadopttodifferenttypesofrolesfortrafficprocessing.GEP3-E1/T1-GenericEricssonProcessor,version3.APIUwithamulticoreCPUusedforgenericprocessing.ItmayadopttodifferenttypesofrolesincludingthenarrowbandwithHSLSS7frontend.GEP3-HD-GenericEricssonProcessor,version3withHardDisk.APIUwithamulticoreCPUusedforgenericprocessingandhasamechanicalstoragemedia.GEP3-SSD-GenericEricssonProcessor,version3withSolidStateDisk.APIUwithamulticoreCPUusedforgenericprocessingandhasflashmemory-basedstorage.TheperformanceofaGEP3-SSDisatleasttwicethatoftheGEP3-HD,withthemaindifference,comparedtothemechanicaldisk,istheincreasedIOPS(I/Operseconds)enablingmoreconcurrentreads/writes.2.4APPActivePatchPanel(APP).pdf2.5LEDCommonLEDs.pdf1.FaultLED,Red2.OperationalLED,Green3.MaintenanceLED,Blue4.StatusLED,YellowFaultLED,RedOnThePIUhasdetectedahardwarefaultOffNohardwarefaultdetectedOperationalLED,GreenOnThePIUhaspowerandallinternalvoltagesarepresent.FastBlinkThePIUisbusywithgoingtooperational.ThePIUisbooting.OffNopowerMaintenanceLED,BlueOnThePIUisinablockedorforeignstateSlowBlinkThePIUisindicatedassecondaryFSBOffNormaloperationStatusLED,YellowOnThePIUhasdetectedahardwareorsoftwareinconsistencyFastBlinkThesecondaryFSBissynchronizingthefilesystemagainsttheprimaryFSB.OffNohardwareorsoftwareinconsistencydetected2.6Internalcables1-MagazineMkVIII,InternalCabling.pdf2-MagazineMkVIII,InternalCabling.pdf3-MagazineMkVIII,InternalCabling.pdf2.7Healthcheck2.8硬件更换ReplacingaGEP.pdf3.EPGSSR8020或者（M320）IntheLTEnetwork,theEPGprovidesaninterfacebetweentheMMEandPDNsforcontrolplanesignaling,andtheeNodeBandPDNsforpayload.3.1硬件SSR8020ChassisLayout.pdfThechassisisthemechanicalenclosurethathousesthevariouscards,fanmodules,andpowerentrymodules(PEMs).TheSSR8020chassisholdsupto20linecardsorSSC1cardsanduptoeighthalf-heightswitch-fabriccards(fourSwitch(SW)cards,twoRoute-Processor/Switch(RPSW)cardsandtwoAlarm/Switch(ALSW)cards.)3.2板卡类型CardTypeDescriptionQuantityFull-heightcardsLinecardsHigh-capacitycardsforprocessingtraffic1to15SSCsSSCsprovideadvancedservices5to19Half-heightcardsRPSWcardManagementandswitch-fabricfunctions1to2Thestandardconfigurationis2RPSWcards.ALSWcardAlarmmanagementandswitch-fabricfunctions1to2Thestandardconfigurationis2ALSWcards.SWcardSwitch-fabricfunctions1to4Thestandardconfigurationis4SWcards.DesignationEPG2012ARevisionEricssonProductNumber10-Port10GigabitEthernetcard≥R2NROA1284192/140-PortGigabitEthernetcard≥R2SROA1284191/13.3逻辑结构PlatformLogicalArchitecture.pdf3.4EPG应用结构TheEPGapplicationconsistsofcontrolplaneanduserplanerunningontheSSC1s.AnallocationoftheapplicationtypesontheinstalledSSC1stakesplaceduringapplicationstartup.Basedonconfiguration,eachinstalledcardisassignedasaControlProcessingBoard(CPB)orPacketProcessingBoard(PPB).Duringstartup,oneoftheSSC1sconfiguredasaCPBtakesontheroleoftheGlobalSessionController(GSC).TheremainderoftheCPBsfunctionasPGWSessionControllers(PSCs),SGWSessionController(SSCs),orstandbyCPBs.Similarlyduringstartup,SSC1sassignedasPPBstakeontheroleofPacketProcessor(PP)andL2TPPacketProcessor(TPP)applicationsorstandbyPPBs.3.5EPG应用和接口的对应关系ApplicationTypeswithSupportedGPRSandEPSInterfaces.pdf3.6HealthcheckHealthCheck.pdf3.7硬件更换ReplacinganEPGBoard.pdf