5020软交换大客户虚拟网方案的立即计费

上海交通大学硕士学位论文5020软交换大客户虚拟网方案的立即计费姓名：曹珏贇申请学位级别：硕士专业：软件工程指导教师：曹健20061001-I-5020CENTREXCentralOfficeExchangeTDMTDMISDNDD16KBPSISDN4000PSTNNGNIPCENTREXNGNIPCENTREXSIPNGNISDN-II-SocketHeart-Beat1.2.3.4.5.6.-III-ImmediateBillingforBusinessCommunicationGroupof5020SoftSwitchABSTRACTCENTREX,originallybasedonTDMswitch,isatailormadesolutionforgroup-customer.Itprovidestelecommunicationservicesforgroup-customerlikehotel.Thissolutionsupportsimmediatebillingfunction;howeverthelimitationofthesystemarchitectureleadstothedelayoftransportationofthebillingfiles,evenincreasestheloadofbillingmoduleofswitch.CENTREXbillingclientconnectstoswitchviaISDN,sothatthebillingfilesaretransferedtoCENTREXbillingclientontheDchannel.ThetrasmissionrateofDchannelis16kbps,whichresultsinthedelayoftransportationofthebillingfiles.Moreover,everyCENTREXbillingclientconsumesanISDNinterface,whichmeansbillinggenerationmodluemusttakecareofthetransporationofCENTREXbillingfiles.Thiskindofworkmodeheavilyincreasestheloadofbillingmoduleofswitch.WhenwethinkabouthowtoimprovethesolutionforCENTREXbillingoutput,telecommunicationnetworkisbeingevolvedfromPSTNtoNGN.IPCENTREXistheoutcomeforNGNandsoftswitch.Itrepresentsthecoreprincipleservicerealizationisolatedfromcallcontrol.IPCENTREXapplicationserverconnectingtosoftswitchviaSIPprotocol,anditprovidestheservicelogic.ConsideringthefastevolutionofNGNandsoftswitch,wedecidetoworkoutanoptimizationsolutionforIPCENTREXbillingoutputbasedonNGNnetworkarchitecture.InordertoacceleratethetrasmissionspeedofIPCENTREXbilling,we-IV-discardtheISDNinterface.Instead,weutilizetheIPnetwork.Meanwhile,toenlargethecapacityofimmediatebillingfunction,weadjustthearchitectureofIPCENTREXbillingoutputsolution.Billingserver,insertedbetweenbillingmoduleofsoftswitchandCENTREXbillingclient,isinchargeofthemanagementandtransportationofIPCENTREXbilling.Sothat,thisnewideacoulddecreasetheloadofbillingmoduleofsoftswitch,andfurthermoreenlargethecapacityofimmediatebillingfunction.Billingserver,whichisthecoreparttoimprovetheIPCENTREXbillingoutputsolution,firstcollectstheformatedIPCENTREXbillingfilesfrombillingmoduleofsoftswitch.Second,itworksoutthebillingrecordaccordingtothebillingfiles.Finally,itdistributesthebillingrecordstotherelevantIPCENTREXbillingclientthroughsocketlinks.Withregardtothebillingserver,stablilityofthesystemisthemostimportantthing.Sometimesunavoidablesoftwareorhardwarefailureswillbringextreamlosstothecustomers,soactiveandstandbymechanismisadoptedwhenwedesignthebillingserver.Thismechanismbecomesaessentialwaytoprovidetimelyandcredibleservice,anditalsoenhancethesecurityofthesystem.Heart-Beatisanothermechanism,whichisadopedtothebillingserver.Itcanensurethecommunicationamongeverymodule.Generally,ImprovementoftheIPCENTREXsolutionbasedonNGNnetworkarchitecture:1.Acceleratethetransmissionspeedofbillingrecordstoclients2.Enhancetheimmediatetransmissionofbillingrecords3.Reducetheloadofbillinggenerationmodulefor5020MGC4.Enlargethecapacityofimmediatebillingfunction5.Increasethebufferforbillingfiles6.OptimizethetopologyofIPCENTREX-V-KEYWORDS:NGN,SoftSwitch,CENTREX,BillingServer.-63-PSTNPublicSwitchTelecomNetworkNGNNextGenerationNetworkPABXPrivateAutomaticBranchExchangeCENTREXCentralOfficeExchangeSSSoftSwitchH.248ITU-TH.248MGCPMediaGatewayControlProtocolSIPSessionInitiationProtocolPOTSPlainOldTelephoneServiceISDNIntegratedServicesDigitalNetworkIADIntegratedAccessDeviceSFSoftPhoneS12System125020MGCMediaGatewayControlFTPFileTransferProtocolIPCENTREXIPCentralOfficeExchangeIPcTCACompactTelecomComputingArchitecturecPCICompactPCIPCIPICMGPCIIndustrialComputerManufacturersGroupPCIEABSExtensionAssistanceBillingSystemCDRCallDetailRecordSYLANTRO-IPCENTREXQ.825ITU-TQ.825CECCDREventControlBaseFilterFTBEABSFilterCustomizedFT825EABSFilter-64-FilteringCombiningDatabaseFTCEABSFilterBillingServer-Sub_System_A-ASub_System_B-BBS_CollectionBillingServerCDRCollectionModuleBS_AnalysisBillingServerCDRAnalysisModuleBS_ExportBillingServerCDRExportModuleBS_BackupBillingServerCDRBackupModule12006102012006102020061020-1-1.11.1.1CENTREXCentralOfficeExchangePABXPABXCENTREXPABXPABXPABXPABXPABXPABXPABXCENTREXCENTREXCENTREXPABXCENTREXPABXPABX-2-PABX1.1.2S12CENTREXS12CENTREXCENTREXCENTREXISDN2B+DS12CENTREX1-11-1PSTNFig.1-1TopologyofPSTNCENTREXCENTREXTSCS12ISDN2B+DDUUS16KbpsD-3-TSCTSCCRISDNPCNT1ISDNCENTREXDSS1TSCTSCVClogonISDNBISDNDISDNDUUS16Kbit/secondUUS1352CENTREX_IDCENTREX343460ISDN1.CENTREX“”2.CENTREX3.CENTREXCENTREX4.5.CENTREX“”“-4-”6.7.CENTREX8.CENTREX9.11011910.11.12.13.14.15.16.17.18.“”19.20.21.22.23.24.25.-5-26.27.28.29.1.1.3NGNNGNPSTNPSTNPSTN64kbpsPSTNInternetATMInternetNGN-6-NGNNGNPSTNIPATMINPSTNPSTNIP-7-43G1.1.4PSTNNGNNGNNGNSIPCENTREXCENTREX1.2.3.NGNNGN-8-1.2NGNNGN5020MGC5020MGCCENTREXIPCENTREX5020MGCEABSSYLANTROIPCENTREXEABSEABS-9-5020MGC2.15020MGC5020MGCEABS2.25020MGC2.2.15020MGCNGNNGN5020MGCNGNYDC003-20015020MGCcTCAcTCAPICMGPCIIndustrialComputerManufacturersGroupcPCIPICMG2.xPICMG2.162.9IPMIcPCI-10-cPCIcTCAcTCAContinuousComputing(CCPU)CCPUFlex216U6U1.6GHz42-15020MGCFig.2-1SystemArc