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1、MSTP(基于SDH的多业务传送平台)链路技术简介Itisalreadyimpossibletomeettherequirementsforbusinesstransferandaggregation.Asaresult,theMSTPtechnologywasborn.MPLSisputforwardbyciscoin1997,andbyIETFcreatedamulti-protocollabelswitchingstandardprotocol,whichUSES2.5switchingtech
2、nologywillbethethirdlayertechnology(suchasIProuting,etc・)andthesecondtechnology(suchasATM,framerelay,etc.)organically,soastomakethebothonthesamenetworkcanprovidepoint~to-pointtransmission,canalsoprovidemulticast;BothprovidetheservicesthattheEthernetwill
3、doaswellasitcan,andprovidereal-timeexchangeserviceswithhighQoSrequirements・1MSTPconceptMSTP(multipleservicetransmissionplatformbasedonSDH)istopointto,basedonSDHplatformandimplementationofTDM,ATM,Ethernetandotherbusinessaccess,processingandtransmission,p
4、rovidesaunifiednetworkmanagementbusinessmorenodes・InadditiontothefunctionofthestandardSDHtransfernode,theSDHmulti-businesstransfernodehasthefollowingmainfeatures.(1)accesstotheTDMbusiness,ATMbusiness,orEthernetbusiness;(2)thetransmissionfeaturesoftheTDM
5、business,ATMbusiness,orEthernetbusinessincludethetransparenttransferfunctionofpoint-to-point:(3)thebandwidthstatisticalreusefunctionoftheATMbusinessorEthernetbusiness:(1)theabilitytomaptoanSDHvirtualcontainerwithanATMbusinessorEthernetbusiness・Themulti-
6、businesstransfernodesbasedonSDHcanbeappliedaccordingtothenetworkrequirementinthetransmissionnetwork，saccesslayer,theconvergencelayer,thesituationoftheapplicationinthebackbonelayerremainstobestudied.Metropolitanareanetworkisthecurrentfocusoftelecomoperat
7、orscompetefor,atpresenttherearemanydifferentkindsofnetworktechnology,includingthemetropolitanareanetworkbasedonthestructureofSDH,roughlybasedonEthernetstructureofmetropolitanareanetwork,metropolitanareanetworkbasedonthestructureofATMandmetropolitanarean
8、etworkbasedonthestructureofDWDM.Actually,SDH,ATM,Ethernet,WDM,etcallkindsoftechnologyhavebeenalsoabsorbthemeritsofothertechnologies,mutualcomplementeachother,thatistorealizerapidtransmission,andtomeetbusinesscarryingmore,alsoprov
