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1、OpticalfibercommunicationtransmissionnetworkcarryingbusinessanalysiFengG，YingWSchoolofInformationEngineering,WUT，Wuhan430070,ChinaE-mail:fcngg163@163.comAbstract：DescribesthecurrentstatusofOpticalFibercommunicationtransmissionnetwork,byintroducingthetechnicalfeaturesandfunction
2、ofAutomaticallySwitchedOpticalNetwork(ASON)，analyzingthecharacteristicsofASONnetworkcarryingbusinessanditsdevelopmenttrend.Keywords:OpticalFibercommunications,ASON;CLCNumber:TN913Code:AIntroductionOpticalfibercommunicationshasdevelopedrapidlybecauseoflowlossJargetransmissionban
3、doftolerance,smallsize，lightweight，resistancetoelectromagneticinterference，crosstalkandotheradvantages.FromtheSDH(SynchronousDigitalHierarchy)tothedevelopmentofDWDM(DenseWavelengthDivisionMultiplexing)，large-capacitydensewavelengthdivisionmultiplexingtechnologywhichenabletherap
4、iddevelopmentofthecapacityofopticalfiberhasbeenmorethoroughlyexploreandsolvenetworkproblemstransmissioncapacitybetweennodes.However，thenetworknodebottlenecksstillveryprominent.Withthecommercializationofavarietyofopticaltransportnetworktechnology，manymajorcarriersareexploringthe
5、introductionofopticaltransportnetworktechnologyissues.ThecarryingbusinessanalysisispresentedbasedonASONtransportnetworksfromtheperspectiveofcarryingbusinessandthecharacteristicsofASONtransportnetworks.OpticalTransportNetworkTechnologyIntheprocessofdevelopmentnearly30years，thedo
6、mesticsingle-wavetransmissionequipmentdevelopedfromthePDHin70softhe20thcenturytotheSDHin90s，andlaterMSTPproductswerelaunchedtomeettheMANIPbusiness.Sincethen，withtheintelligentnetworkcapabilitiesanddemandfornetworkupgrade,theASONdevicebasedonMSTPwaslaunched.Themulti-waveopticalt
7、ransmissionsystemsalsodevelopmentrapidly，theratefromearly2.5GtoI0G，thechannelwavelengthsfrom8to160ormore.Today,theuseofDWDMtechnologyhasbeenalotoftrunkintothemetropolitanarea，thenetworkflexibilityandoperationalreliabilityhasalsobeencarryingagreatimprovement121.Afterseveralyears
8、ofdevelopment，opticaltransmissiontechnologyhasaveryper
