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1、ATM交换网络的相关分析CorreiationanalysisofATMswitchingnetworksRenChen,deputygeneralmanagerofLanzhoubranchofChinaUnicomTheATMnetworkasthedataplatform,combinestheadvantagesofcircuitswitchinganddataexchange,hasbeenwidelyusedfortelecomoperators,butintheendtoendwithdesktopappli
2、cations,arematchedwiththeuserendequipmentprotocollimitationsandinadequateuseofdefectsonthelocalnetworktransmissionresource・Thispaperdiscusseshowtosolvethisproblemandputsforwardthesolution,whichhasbeentestedandverifiedbydevelopingprototype・KeywordsATMswitchingF/Rsw
3、itchOneATMtechnologyanditsmultidataserviceexchangecarryingnetwork1,ATMtechnologybriefTheATM(ASYNCHRONOUSTRANSFERMODE),thatis,asynchronoustransfermode,whichweoftensayhastheadvantagesofpacketswitchingandcircuitswitching,correspondingtothesecondlayeroftheOSIprotocolr
4、eferencemodel・ATMthroughAALlayeradaptation,willbeacceptedbydifferentbusinessapplications・DuetotheadvaneedtechnologyofATM,hastheabilityinapublicnetworkarchitectureincludingF/R(FrameRelay)multiplexingcircuit,TCP/IPaccessandbearing,thevariousservicesbasedonATMcircuit
5、,playsanimportantroleintheexchangeofmultiservicedatacarryingnetwork・Therefore,telecomoperatorsuseitasthebackboneofmanydataservicestoexchangethebearernetwork・Theapplicationof2andATMtechnologyindataexchangenetworkNormally,the622M/155MATMswitchisusedastheendoffice,an
6、dthe622M/155MterminalisconnectedtotheregionalcoreofficebytheSDHcircuitintheformoffiberencapsulationorfiberdirectconnection・ThelocalcoreofficeequipmentusuallyadoptsATMswitchwith2.5Gormorebackplaneswitchingcapability,andthenetworkcomponentsarecompletedthroughSDHenca
7、psulationor622Mcircuitwithopticalfiberdirectconnection.ThebasicswitchprovidesATM/2M/34Minterface,singlemodemultimodeport,IPport,dockingwiththeuser'sATMcircuitthroughtheportprovidesdifferentbandwidthopenedinaccordancewiththerequirements;provideF/Rcircuitchannelorno
8、nchannelizedthroughthe2M/34Mport;throughtheIPporttoprovideTCP/IPbaseddocking,suchasshownbelow:3,ATMswitchingnetworkstructureandbusinesssupportdeficienci
