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1、光纤接入网技术综述(Overviewofopticalfiberaccessnetworktechnology)Fromtheperspectiveoftheentiretelecommunicationnetwork,theentirenetworkcanbedividedintothepublicnetworkanduserhomenetwork,twolarge,theCPNbelongstoallusers,thus,usualpartoftelecommunicationnetworkreferstothe
2、publictelecommunicationnetworks.Thepublictelecommunicationnetworkcanbedividedintolongdistancenetwork,relaynetworkandaccessnetwork3parts.Thecombinationoflongdistancenetworkandrelaynetworkiscalledthecorenetwork.Relativetothecorenetwork,accessnetworkbetweenlocalsw
3、itchandtheuser,mainlytocompletetheuseraccesstocorenetwork,accessnetworknodeinterface(SNI)bybusinessandusernetworkinterface(UNI)ofaseriesoftransmissionequipment.Inrecentyears,thenewtechnologicalrevolutionrepresentedbyInternetisprofoundlychangingthetraditionaltel
4、ecommunicationconceptandsystemstructure,ascountriesaccessnetworkmarketgraduallyopening,therelaxationofthetelecomregulationpolicy,competitionisincreasinglyintensifiedandexpanded,therapidemergenceofnewbusinessrequirements,cabletechnology,includingopticalfibertech
5、nologyandthedevelopmentofwirelesstechnology,accessnetworkhasbecomethefocusofattention.Withthehugemarketpotential,thereareallkindsofaccessnettechnologies.Opticalfibercommunicationhastheadvantagesofhighcommunicationcapacity,highquality,stableperformance,anti-elec
6、tromagneticinterferenceandstrongconfidentiality.Opticalfiberplaysanimportantroleinmainlinecommunication.Intheaccessnetwork,opticalfiberaccesswillalsobethefocusofdevelopment.Opticalfiberaccessnetworkisalong-termsolutiontodevelopbroadbandaccess.1.Basiccomposition
7、ofopticalfiberaccessnetworkOpticalfiberaccessnetwork(OAN)referstothetransmissionfunctionoftheaccessnetworkwithopticalfiberasthemaintransmissionmedium.Connecttothebusinessnodethroughtheopticallineterminal(OLT),connectedtotheuserthroughtheopticalnetworkunit(ONU).
8、Opticalfiberaccessnetworksincluderemotedevices-opticalnetworkunitsandinsetdevices-opticallineterminalsthatareconnectedthroughtransmissiondevices.Themaincomponentsofthesystem