G_GPON技术基础

2020/5/30,10GGPON技术基础,Page2,目录,Page3,ITU-TG.984.3GPONTC层规格要求GTC复用结构及协议栈介绍GTC帧结构介绍ONU注册激活流程DBA规格要求告警和性能,ITU-TG-984.1/2/3/4,产品开发简单产品兼容性强,ITU-TG.984.1GPON网络参数说明保护倒换组网要求,ITU-TG.984.4OMCI消息结构介绍OMCI设备管理框架OMCI实现原理简述,ITU-TG.984.2PMD层规格要求2.488Gbps下行光接口参数规格要求1.244Gbps上行光接口参数规格要求物理层开销分配,GPON标准协议,Page4,广播方式：GPON的下行帧长为固定的125us，下行为广播方式，所有的ONU都能收到相同的数据，但是通过GEMPORTID来区分不同的业务的数据，ONU通过过滤来接收属于自己的数据。,GPON原理-下行数据,Page5,TDMA方式：GPON的上行是通过TDMA（时分复用）的方式传输数据，上行链路被分成不同的时隙，根据下行帧的upstreambandwidthmap字段来给每个ONU分配上行时隙，这样所有的ONU就可以按照一定的秩序发送自己的数据了，不会产生为了争夺时隙而冲突。每帧共有9120个时隙。,GPON原理-上行数据,Page6,GPON协议栈,Page7,PhysicalControlBlockDownstream(PCBd),Payload,AllocID,Start,End,AllocID,Start,End,1,100,200,x,300,500,T-CONT1(ONT1),T-CONTx(ONT2),Slot100,Slot200,Slot300,Slot500,PLOu,PLOAMu,PLSu,DBRux,Payloadx,DBRuY,Payloady,UpstreamBandwidthMap,125us,DownstreamFraming,UpstreamFraming,GPON帧结构,AllocID,Start,End,y,501,650,1,x,y,T-CONTy(ONT2),Slot650,Slot501,T-CONTx,T-CONTy,Page8,目录,Page9,Page9,FSAN把下一代PON分成了两个阶段:NGA1是在TDMAPON的基础上做更高的速度。其速率定义为10Gbps。NGA2是对NG-PON1一些更可能的技术升级和一些模糊目标的探讨。比如象：WDMPON,OFDM等等。NG-PON可以很好的应用于FTTx，如企业用户，个人用户和移动回传等。,10GGPON的标准发展（1）,Page10,Page10,GPON,XGPON1,NGA1,NGA2,2009,2010,2011,2012,2.5G/10G2010.6Publish,10GGPON的标准发展（2）,10G/2.5G,ODNreuse,ODNreuseisnotobligation,ITUNGA1XGPON1：10GGPONAsymmetric：PublishedG.987.1G.987.3G.987.3，G.988(G.OMCI)：FinishedinJune2010.,Page12,10GGPON产业链发展,Page13,10GGPON设备厂家现状,Page14,目录,Page15,Page15,10GGPON和GPON产品规格的主要差异,Page16,Page16,GPONV.S.10GGPON关键改进点,G-PMD,higherDatarate,Longerdistance,ImprovedPowerbudget,LargerSplitratio,XG-PMD,G-TC,Moreeffectiveframing,MoreflexibleDBA,EnhancedSecurityfeatures,necessarypowersavingfeatures,XG-TC,GPONOMCI,BackwardcompatibilitywithGPON,Adaptivetofutureuse,GenericOMCI,IntegratedIOPspecs,Generalrequirement,Generalrequirement,WDMcoexistence200910amd1,200303p;200803amd1,200803p;200902amd1;200911amd2;,200803p;200906amd1;200911amd2;,201001p,201001p,?,?,PHY层的改进体现了运营商对下一代PON设计的基本思路；TC层的改进提供了对下一代PON网络的系统级适配；管理层相对独立，改动影响较小。,Page17,Page17,G.987.1V.S.G.984.1通过WDMoverlay实现共存,ONU,ONU,ONU,ONU,XG-ONU,GPONOLT,XG-ONU,XG-ONU,XG-ONU,XG-OLT,WDM1r,1550RF,GPONU/S,XGPONU/S,GPOND/S,XGPOND/S,1260,1280,1290,1330,1480,1500,1575,1580,wavelengthplan,WDMoverlay,G.984.5amd1,对已部署的GPONODN网络无影响,Page18,Page18,G.987.2V.S.G.984.2-更快，更多，更远,Page19,Page19,G.987.3V.S.G.984.3-增强和改进,TC层对比,Page20,Page20,G.987.3V.S.G.984.3-增强和改进,Page21,Page21,G.987.3V.S.G.984.3-分层对比,分层通过增加一个新的子层实现一个更清晰的协议栈,PLOAM,OMCI,GEM,GTCFramingsublayer,GPONPMD,PLOAM,OMCI,GEM,OMCIadapter,GEMadapter,DBAcontrol,GPONPMD,XG-PONadaptationlayer,XGTCPHYadaptationsublayer,GTCFramingsublayer,Header,GEM/XGEMpayload,Header,GTC/XGTCpayload,Userdata,GTC/XGTCpayload,FECdata,PSBd,ScrambledPHYframepayload,GTC/XGTCframe,P,FECdata,P,FECdata,P,OMCIadapter,GEMadapter,DBAcontrol,GPONadaptationlayer,FECcodeword,FECcodeword,FECcodeword,GEM/XGEMframing,GTC/XGTCframe,GTC/XGTCframing,FEC+scrambling+PHYheader,GPONTClayer,XG-PONTClayer,Page22,Page22,G.987.3V.S.G.984.3帧结构对比,下行GTC/XGTC帧结构,G.984.3GTCD/Sframestructure,G.987.3GTCD/Sframestructure,PCBd,GTCPayload,Psync,4,byte,PLOAMd,13,byte,USBWmap,N,8,byte,Alloctionstruction,1,8,byte,Ident,4,byte,Alloctionstruction,2,8,byte,.,AlloctionstructionN,8,byte,BIP,1,byte,Plend,4,byte,Plend,4,byte,USBWmap,N,8,byte,FECInd,1,bit,REV,1,bit,Superframecounter,30,bit,Blen,12,bit,Alen,12,bit,CRC,8,bit,Alloc,-,ID,12,bit,Flags,12,bit,SStart,2,byte,SStop,2,byte,CRC,1,byte,XGTCheader,XGTCPayload,HLend,4,byte,PLOAMds,P,48,byte,BWmap,N,*,8,byte,Alloctionstruction,1,8,byte,Alloc,-,ID,14,bit,Flags,2,bit,Starttime,2,byte,GrantSize,2,byte,BProfile,2,bit,HEC,13,bit,BWmap,N,8,byte,BWMaplength,11,bit,PLOAMcount,8,bit,HEC,13,bit,Alloctionstruction,2,8,byte,.,AlloctionstructionN,8,byte,FWI,1,bit,GTCheader,GTCpayload,125us,Page23,Page23,上行帧结构,G.984.3GTCU/Sframestructure,G.987.3GTCU/Sframestructure,G.987.3V.S.G.984.3帧结构对比,Preamble,Delimiter,BIP,1,byte,ONU,-,ID,1,byte,Ind,1,byte,PLOAMu,13,or,0,byte,DBRu,GTCPayload,DBRu,GTCPayload,Allocation,Allocation,.,DBA,1,|,2,byte,CRC,1,byte,Burst,header,PLOu,ONU,-,ID,10,bit,Ind,9,bit,BIP,1,byte,DBRu,GTCPayload,DBRu,GTCPayload,Allocation,Allocation,.,BuffOcc,3,byte,CRC,1,byte,HEC,13,bit,XGTC,header,XGTC,Trailer,PLOAMu,0,or,48,byte,bursti,125us,burstj,burstk,Page24,Page24,thefragmentationruleisthesameasthatofGPONexceptthepre-emptionisnotallowed;theidleframedefinitionisdifferentfromGPONcarriedindedicatedXGEMPortID0 xFFFF;sizeequaltomultipleof4;thecontentisnotdefined.,GEM/XGEM帧结构,G.984.3GEMframestructure,G.987.3GEMframestructure,G.987.3V.S.G.984.3帧结构对比,XGEMPayload,XGEM,header,PLI,14,bit,KeyIndex,2,bit,XGEMPort,-,ID,16,bit,Options,18,bit,LF,1,bit,HEC,13,bit,GEMPayload,Lbyte,GEM,header,PLI,12,bit,PortID,12,bit,PTI,3,bit,HEC,13,bit,Payload,header,Page25,Page25,PLOAM消息,G.987.3V.S.G.984.3PLOAM消息对比,ONUID,MessageID,Data,CRC,Octets,1,1,10,1,ONUID,MessageID,Messagecontent,MIC,SeqNo,Octets,1-2,3,4,5-40,41-48,Page26,Page26,下行PLOAM消息,G.987.3V.S.G.984.3PLOAM消息对比,Page27,Page27,上行PLOAM消息,G.987.3V.S.G.984.3PLOAM消息对比,Page28,Page28,增强安全特性,G.987.3V.S.G.984.3安全特性对比,Page29,Page29,Page29,G.988V.S.G.984.4OMCI对比,和G.984.4相比,除了以下特性增强，G.988整体和G.984.4完全一致过程更简化消息更安全MIB更简洁、更聚焦,Page30,目录,Page31,Page31,独立模式,1577,1270,OLT,10GGPON,1490,1310,WDM,OLT,GPON,10GGPON,1577,1270,混合模式,10GGPON和GPON的组网应用模式,Page32,Page32,GPONONT,OLT,NMSupgrade,GPONMDU,ODNreuse,NMSupgrade,Addnew10GGPONse