吉比特无源光网络GPON技术及其标准化.docx

吉比特无源光网络GPON技术及其标准化.docx吉比特无源光网络GPON技术及其标准化Isdescribedinthispaper,themaintechnicalfeaturesofGPON,andfurtherexplainedindetailthefunctionofprotocollayer,theDBAmechanism,theONUactivateregistration,OMCI,suchaskeytechnologyandprinciple,alsointroducestheGPONcarryingtwospecificwaysaTDMbusiness,(Gigabit-work,work)work(PON)technologyisanimportantbranchoffamilyandothersimilartechnologiesincludingAPON/BPON,・ConceptofGPON,asbyFSAN(work,work)isputforwardin2001,beforethis,FSAN/ITUalsoproposesandstemdardizetheAPON,BPONtechnology(ITU-TG・983・Xseriesstandard),IEEEhasalsostartedtoEPONtechnologystandardizationandsoonofficiallyreleasedin2003IEEE802・3ah,pleted・FSAN/elerationandATMtechnologybasedonATMtechniqueisgraduallyshrinkingbeforeAPON/mercialandpracticalaspects,,theFSAN/ITUisbasedontheAPONstandard,redesigningthenewphysicallayertransmissionrateandtheTClayer,andintroducingnewGPONtechnologyandstandards・positionofGPONsystemAndothersimilarPONtechnology,esstechnology,bythesideofthebureauofOLT(erminal,erminal),theusersideONU(workUnit,workUnit)andODN(work,work),-called"passive"referstoODNdoesnotcontainanyactiveelectronicdevicesandelectronicpowersupplies,biner(Splitter)ponents,suchasnoexpensiveactiveelectronicdevices・Figure1GPONsystemreferenceconfigurationGPON(OLTandONU)inthedownwarddirectionusingTDMbroadcastmode,theupwarddirection(ONUtoOLT)adoptsTDMA(ess)method,theflexibilitytoformatree,star,thegenerallineartopologicalstructure,thetypicalstructureofatreestructure・GPONsystemrequirementsbetweenOLTandONUopticaltransmissionsystemconformstotheITU--modefiber,hasgenerallyTDDsinglefiberbi-directionalhasrealizedbyusingWDMtechnologytransfer,use1260nmto1360nmwavelengthupward,downwarduse1480nmto1500nmwavelength・Inaddition,theGPONsystemcanalsocarrytheCATVbusinesswithathirdwavelength(154Onm、156On