EPON中上行接入方案和OLT的设计

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1、浙江工业大学硕士学位论文EPON中上行接入方案和OLT的设计姓名：王坤申请学位级别：硕士专业：通信与信息系统指导教师：杨扬;石旭刚20051115DESIGN0FUP。ACCESSSCHEMEANDOLTINEpONABSTRACTWhileinrecentyearsthetelecommunicationsbackbonehasexperiencedsubstantialgrowth,littlehaschangedintheaccessnetwork．Sotheaccessnetworkbecomesthebottleneckbetweenhigh—capacit

2、ylocalareanetwork∞ANs)andthebackbone"network。TheEthernetbasedPassiveOpticalNetworkfEPON)，whichusesthematureEthernetProtocolandequipment，hasnoneedtomakeprotocolconversionbetweenIPandATMasAPONdoes。BecauseofitslOWcost，lowoverheadandhighbandwidthmilky,EPONhasbecameoneofthepromisingapproache

3、sofbroadbandaccess．，Thefirstly,thispaperanalyzesthecharacteristicsandadvantagesofEPON，andintroducesthestructureofEPONsystemandoperationprinciple．Then,accordingtOtheprotocolofEPON,wedesignakindofnewupaCCeSStechnologywhichimplementedintheFPGA，putforwardanewdynamicbandwidthallocationscheme

4、——Adapt{vedynamicbandwidthallocationschemebasedonweight,analysetherealizationprocedureofthisaccesstechnologyindetail．ThispapealsointroducestherealizationofthehardwareandsoftwareofOLT,thenanalyzedthefunctionofeverypartinthehardwareandsoftwareaccordingtothedesignofEPONsystem,Atlast，weuset

5、hecomputersimulationthroughQUARTUSII，whichshowsaaccurateandvalidityresultofourwork．．KEYWORDS：EPON，accessnetwork,register,ranging，bandwidth，simulat4中英文缩写对照说明ADSL(AsymmetricDigitalSubscriberLine)AON(ActiveOpticalNetwork)APON(ATIVI-PON)ATM(AsynchronousTransferMode)BPSK03inaryPhaseShiftKeyi

6、ng)CAP(CarrierlessAmplitudePhase)CATV(CommunityAntennaTelevision)CPU(CentralProcessingUni0CRC(CyclicRedundancyCheck)DBA(DynamicBandwidthAssignment)DCS(DigitalCrossconnectSystem)DDR(DualDateRate)DMA(DirectMemoryAaccess)DSL(DigitalSubscriberLine)DSP(DigitalSignalProcessors)EMS(ElementMana

7、geSystem)EPON(Ethernetpassiveopticalnetwork)FDD(FrequencyDivisionDuplex)FDMA(FrequencyDivisionMultipleAccess)‘FITL(FiberInTheLoop)FPGA(FieldProgramableGateArty)FSAN(FullServiceAccessNetwork)GMII(GigabitMediaIndependentInterface)HDSL(HighSpeedDi醇alSubscriberLine)HFC(HybridFiberC