GGPON技术基础学习课程

1、Page 1目录GPON技术回顾技术回顾10G GPON标准和进展标准和进展10G GPON技术基础技术基础10G GPON演进演进第1页/共33页第一页，编辑于星期五：二十一点 十八分。Page 2GPON TC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-T G-984.1/2/3/4产品开发简单产品开发简单产品兼容性强产品兼容性强GPON网络参数说明保护倒换组网要求OMCI消息结构介绍OMCI设备管理框架OMCI实现原理简述PMD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

2、GPONGPON标准协议标准协议第2页/共33页第二页，编辑于星期五：二十一点 十八分。Page 3 广播方式：广播方式：GPONGPON的下行帧长为固定的的下行帧长为固定的125us125us，下行为广播方式，所有的，下行为广播方式，所有的ONUONU都能收都能收到相同的数据，但是通过到相同的数据，但是通过GEMPORT IDGEMPORT ID来区分不同的业务的数据，来区分不同的业务的数据，ONU ONU 通过过滤来接收通过过滤来接收属于自己的数据。属于自己的数据。GPONGPON原理原理-下行数据下行数据第3页/共33页第三页，编辑于星期五：二十一点 十八分。Page 4 TDMATDM

3、A方式：方式：GPONGPON的上行是通过的上行是通过TDMATDMA（时分复用）的方式传输数据，上行链路被分成不同（时分复用）的方式传输数据，上行链路被分成不同的时隙，根据下行帧的的时隙，根据下行帧的upstream bandwidth mapupstream bandwidth map字段来给每个字段来给每个ONUONU分配上行时隙，这样所分配上行时隙，这样所有的有的ONUONU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91209120个时隙。个时隙。GPONGPON原理原理-上行数据

4、上行数据第4页/共33页第四页，编辑于星期五：二十一点 十八分。Page 5GPON GPON 协议栈协议栈第5页/共33页第五页，编辑于星期五：二十一点 十八分。Page 6Physical Control Block Downstream (PCBd)PayloadAllocIDStartEndAllocIDStartEnd1100200 x300500T-CONT1(ONT 1)T-CONT x(ONT 2)Slot 100Slot 200Slot 300Slot 500PLOuPLOAMuPLSuDBRu xPayload xDBRu YPayload yUpstream Bandwi

5、dth Map125usDownstream FramingUpstream FramingOLT ONT 1ONT 64GPONGPON帧结构帧结构AllocIDStartEndy501650 ONT 21 1x xy yT-CONT y(ONT 2)Slot 650Slot 501T-CONT x xT-CONT y第6页/共33页第六页，编辑于星期五：二十一点 十八分。Page 7目录GPON技术回顾技术回顾10G GPON标准和进展标准和进展10G GPON技术基础技术基础10G GPON演进演进第7页/共33页第七页，编辑于星期五：二十一点 十八分。Page 8Page 8FSAN把

6、下一代PON分成了两个阶段:NGA1是在TDMA PON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：WDM PON, 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。10G GPON10G GPON的标准发展（的标准发展（1 1）第8页/共33页第八页，编辑于星期五：二十一点 十八分。Page 9Page 9GPONXGPON1NGA1NGA22009201020112012 2.5G/10G2010.6 Publish10G GPON的标准发展（2）10G/2.5GODN

7、 reuseODN reuse is not obligation l ITU NGA1 XGPON1： 10G GPON Asymmetric： l ITU NGA1 XGPON2： 10G GPON Symmetric： Discussion starts in 2010.Q1. One possibility is to overleap symmetric 10G GPON and directly migration to NGA2.l ITU NGA2： Start in 2010 Q1 and discuss the technology trend.XGPON2WDM-PON,

8、 Stacked， 40G, 10G/10G第9页/共33页第九页，编辑于星期五：二十一点 十八分。Page 10Page 1010G GPON的标准发展（3）XG-PON1: Asymmetric 10G/2.5G 10G GPONlG.987x is based on the GPON standard G.984x，and compatible with G.984.lG.987x inherits the GPON characteristic, and also supports the high quality & full service experience.lG.98

9、7x shares the same management mechanism, and can realizes easy upgrade from the current GPON OSS system;l， ： Finished in Oct. 2009;l， G.988(G.OMCI)：Finished in June 2010.第10页/共33页第十页，编辑于星期五：二十一点 十八分。Page 1110G GPON产业链发展第11页/共33页第十一页，编辑于星期五：二十一点 十八分。Page 1210G GPON设备厂家现状第12页/共33页第十二页，编辑于星期五：二十一点 十八分。

10、Page 13目录GPON技术回顾技术回顾10G GPON标准和进展标准和进展10G GPON技术基础技术基础10G GPON演进演进第13页/共33页第十三页，编辑于星期五：二十一点 十八分。Page 14Page 1410G GPON和GPON产品规格的主要差异10G GPON（G.987）GPON（G.984）波长范围波长范围DS 15751580nm US 12601280nmDS 1480-1500nmUS 1260-1360nm速率速率DS 9.95328GbpsUS 2.48832GbpsDS 2.48832GbpsUS 1.24416Gbps/2.48832Gbps功率预算功率

11、预算29dB/31dB可扩展至33dB/35dBClass A: 5-20dBClass B: 10-25dBClass C: 15-30dBClass C+: 17-32dB最大逻辑距离最大逻辑距离 60km（目前样机规格为100km）60km最大距离差最大距离差 20km（目前样机规格为40km）20km最大分支比最大分支比 1：64（目前样机规格为1：256）1：64FEC下行：强FEC（强制实现，强制使用）上行：弱FEC（强制实现，可选使用）上下行FEC强度一致，都是强制实现，可选使用帧结构帧结构XGEMGEM认证认证OLT和ONU双向认证OLT对ONU单向认证每每PON口支持口支持T

12、CONT数目数目2048（其中非FIX类型的个数512）最大1024（其中非FIX类型的个数512）第14页/共33页第十四页，编辑于星期五：二十一点 十八分。Page 15Page 15GPON V.S. 10G GPON GPON V.S. 10G GPON 关键改进点G-PMDhigher Data rateLonger distanceImproved Power budgetLarger Split ratioXG-PMDG-TCMore effective framingMore flexible DBAEnhanced Security featuresnecessary pow

13、er saving featuresXG-TCGPON OMCIBackward compatibility with GPONAdaptive to future useGeneric OMCIIntegrated IOP specsGeneral requirementGeneral requirementWDM coexistence & smooth migrationG.984 seriesG.987 series200803p;200910amd1200303p;200803amd1200803p;200902amd1;200911amd2;200803p;200906am

14、d1;200911amd2;201001p201001p?p PHY层的改进体现了运营商对下一代PON设计的基本思路；pTC层的改进提供了对下一代PON网络的系统级适配；p管理层相对独立，改动影响较小。第15页/共33页第十五页，编辑于星期五：二十一点 十八分。Page 16Page 16通过WDM overlayWDM overlay实现共存ONUONUONUONUXG-ONUGPON OLTXG-ONUXG-ONUXG-ONUXG-OLTWDM1r1550 RF1550 RFGPON U/SXGPON U/SGPON D/SXGPON D/S126012801290133014801500

15、15751580wavelength planWDM overlay p 对已部署的GPON ODN网络无影响第16页/共33页第十六页，编辑于星期五：二十一点 十八分。Page 17Page 17更快，更多，更远ContentContentGPONGPON10G-PON10G-PON线路速率线路速率2.5G DS / 1.25G US10G DS / 2.5G or 5G US 精确线路速率精确线路速率2.48832 Gb/s D/S 9.95328 Gb/s D/S / 2.48832 Gb/s U/S 波长范围波长范围1480-1550nm DS1290-1330nm US1575-15

16、80nm DS1260-1280nm US分光比分光比32/6464最大传输距离最大传输距离20 km (Logical: 60 km) 20km(Logical: 60 km) 最大差分距离最大差分距离20KmUp to 40km光功率预算光功率预算ClassB: 10- 25dB Class B+: 13-28dBClassC: 15-30dB ClassC+: 17-32dB N1（14 29dB)N2（16 31dB) 可扩展到 33/35dB第17页/共33页第十七页，编辑于星期五：二十一点 十八分。Page 18Page 18增强和改进featuresfeaturesitemsit

17、emsG.984.3G.984.3G.987.3G.987.3Whole lookWhole lookProtocol layeringGPON adaptation GTC framing PHYservice adaptation XGTC framing XGTC PHY adaptation PHY. See slide 10.Sub-layer functionsSub-layer functionsFEC D/S - RS(255,239) , mandatory implemented and optionally on;U/S RS(248, 232), optionally

18、implemented and optionally on.D/S - RS(248, 216), mandatory implemented and mandatory on;U/S RS(248, 232), mandatory implemented and optionally on.scrambling8 bit scrambler: polynomial used is x7 + x6 + 158 bit scrambler: polynomial used is x58 + x39 + 1Basic TC Basic TC parametersparametersONU ID8

19、bit length; thus support up to 256 split ration. (See G.984.3 5.5.2) 10 bit length; thus support up to 1024 split ration. (See G.974.3 6.4.2) Alloc-ID12 bit length; thus support value range from 0 to 4095. (See G.984.3 5.5.3) 14 bit length; thus support value range from 0 to 16383 . (See G.987.3 6.4

20、.3)GEM ID12 bit length; thus support value range from 0 to 4095. (See G.984.3 5.5.5) 16 bit length; thus support value range from 0 to 65535 . (See G.987.3 6.4.4)DBADBATraffic descriptorOnly applied in U/SCould be applied in both U/S and D/SBandwidth allocation rulesConsecutive allocation;not requir

21、e to cross the PHY frame boundary per burstNot recommend consecutive allocations;an ONU burst can cross the PHY frame boundary pTC层对比第18页/共33页第十八页，编辑于星期五：二十一点 十八分。Page 19Page 19增强和改进FeaturesFeaturesItemsItemsG.984.3G.984.3G.987.3G.987.3FramingFramingD/S GTCn basic frame architectures are the samen f

22、ields are different in details n word alignment are required for simplifying processingn See slides 11 - 13 U/S GTCGEMServices mapping Services mapping into into GEM/XGEMGEM/XGEMn Native TDM; n Ethernet; n IP; n MPLS; n SDHn Ethernetn MPLSPLOAMPLOAMOverviewn enlarged size n integrity check enhancedn

23、 robustness enhancedD/S PLOAMSimplified message systems.U/S PLAOMSimplified message systems.SecuritySecurityEncryptionKey switchover changed.AuthenticationAuthentication enhanced.Power Power ManagementManagementNot a formal standardized contentPick up two modes for power saving, see slide.第19页/共33页第

24、十九页，编辑于星期五：二十一点 十八分。Page 20Page 20分层对比p分层 通过增加一个新的子层实现一个更清晰的协议栈PLOAMOMCIGEMGTC Framing sublayerGPON PMDPLOAMOMCIGEMOMCI adapterGEM adapterDBA controlGPON PMDXG-PON adaptation layerXGTC PHY adaptation sublayerGTC Framing sublayerHeaderGEM/XGEM payloadHeaderGTC/XGTC payloadUser dataGTC/XGTC payloadFEC

25、 data PSBdScrambled PHY frame payloadGTC/XGTC framePFEC data PFEC data POMCI adapterGEM adapterDBA controlGPON adaptation layerFEC codewordFEC codewordFEC codeword GEM/XGEM framing GTC/XGTC frame GTC/XGTC framing FEC + scrambling + PHY headerGPON TC layerXG-PON TC layer第20页/共33页第二十页，编辑于星期五：二十一点 十八分。

26、Page 21Page 21帧结构对比p 下行GTC/XGTC帧结构PCBdGTC PayloadPsync4bytePLOAMd13byteUS BWmapN8byteAlloction struction18byteIdent4byteAlloction struction28 byte.Alloction structionN8byteBIP1bytePlend4 bytePlend4byteUS BWmapN8byteFEC Ind1bitREV1bitSuperframe counter30bitBlen12bitAlen12bitCRC8bitAlloc-ID12bitFlags1

27、2bitSStart2byteSStop2byteCRC1byteXGTC headerXGTC PayloadHLend4bytePLOAMdsP48byteBWmapN*8 byteAlloction struction18byteAlloc-ID14bitFlags2bitStart time2byteGrant Size2byteBProfile2bitHEC13bitBWmapN8 byteBWMap length11 bitPLOAM count8bitHEC13bitAlloction struction28byte.Alloction structionN8 byteFWI1b

28、itGTC headerGTC payload125us第21页/共33页第二十一页，编辑于星期五：二十一点 十八分。Page 22Page 22p 上行帧结构帧结构对比PreambleDelimiterBIP1byteONU- ID1byteInd1bytePLOAMu13 or 0byteDBRuGTC PayloadDBRuGTC PayloadAllocationAllocation.DBA1|2byteCRC1 byteBurst headerPLOuONU- ID10bitInd9bitBIP1 byteDBRuGTC PayloadDBRuGTC PayloadAllocatio

29、nAllocation.BuffOcc3byteCRC1 byteHEC13bitXGTCheaderXGTCTrailerPLOAMu0 or 48byte burst i125us burst j burst k第22页/共33页第二十二页，编辑于星期五：二十一点 十八分。Page 23Page 23p the fragmentation rule is the same as that of GPON except the pre-emption is not allowed;p the idle frame definition is different from GPONn carr

30、ied in dedicated XGEM Port ID 0 xFFFF;n size equal to multiple of 4; n the content is not defined.pGEM/XGEM 帧结构帧结构对比XGEM PayloadXGEMheaderPLI14 bitKey Index2bitXGEM Port-ID16bitOptions18bitLF1bitHEC13bitGEM PayloadL byteGEMheaderPLI12bitPort ID12bitPTI3bitHEC13bitPayloadheader第23页/共33页第二十三页，编辑于星期五：二

31、十一点 十八分。Page 24Page 24p PLOAM消息G.984.3G.984.3G.987.3G.987.3StructureStructuresizesize13 bytes48 bytesrateratel D/S: One per frame;l U/S: One per burstl D/S: no more than one broadcast message; not more than one unicast message per ONU;l U/S: one per burst Channel robustnessChannel robustnessweakenha

32、nced Message integrity checkMessage integrity checkCRC-8AES-CMAC消息对比消息对比ONU IDMessage IDDataCRCOctets11101ONU IDMessage IDMessage contentMICSeqNoOctets1-2345-4041-48第24页/共33页第二十四页，编辑于星期五：二十一点 十八分。Page 25Page 25p 下行PLOAM消息FunctionsFunctionsG.984.3G.984.3G.987.3G.987.3PHY framing features PHY framing

33、features configurationconfigurationnUpstream_OverheadnExtended_Burst_Length nProfileActivationActivationn Assign_ONU-ID n Ranging_Time n Deactivate_ONU-ID n Disable_Serial_ Number n Assign_Alloc-ID n POP-UPn Assign_ONU-ID n Ranging_Time n Deactivate_ONU-ID n Disable_Serial_ Number n Assign_Alloc-ID

34、Protection auto SwitchoverProtection auto Switchovern PSTn PSTEncryption Key relatedEncryption Key relatedn request_keyn Key_swithcing_timen Key_ControlPower savingPower savingn nonen Sleep_AllowAuthenticationAuthenticationn Request Passwordn Request_RegistrationError controlError controln No messag

35、e;n PEE.n noneOMCC build-upOMCC build-upn Configure Port-IDn noneGEM encryptionGEM encryptionnEncrypted_Port-IDnnone消息对比消息对比第25页/共33页第二十五页，编辑于星期五：二十一点 十八分。Page 26Page 26p 上行PLOAM消息FunctionsG.984.3G.984.3G.987.3G.987.3Activationn Serial_Number_ONUn Serial_Number_ONU Encryption Key relatedn Encryption

36、_Keyn Key_ReportAuthenticationn Passwordn RegistrationProtection auto switchovern PSTn PSTError controln No message;n REI.n noneTrouble shootingn Dying-Gaspn noneRobustness checkn ACKn ACKPower savingn nonenSleep request消息对比消息对比第26页/共33页第二十六页，编辑于星期五：二十一点 十八分。Page 27Page 27p 增强安全特性FeaturesFeaturesG.9

37、84.3G.984.3G.987.3G.987.3Threat modelThreat modeln D/S transmission sniffingn D/S transmission sniffing n theft of servicen man in the middle attackEncryption algorithmEncryption algorithmn AES-128n AES-128Encryption Key updateEncryption Key updaten superframe counter is used for keeping sync since

38、there is only D/S encryption requiredn its initiated by the OLT and there are several communications between OLT and ONU, since the U/S encryption may be requiredUser Data protectionUser Data protectionn D/S Unicast (mandatory)n D/S Unicast (mandatory)n D/S multicast (optional)n U/S unicast (optiona

39、l)Managing integrity Managing integrity protectionprotectionn PLOAM CRC8n OMCI CRC32n PLOAM AES-CMACn OMCI- AES-CMACAuthenticationAuthenticationn ONU authentication based on PSWD - optionaln mutual authentication thru OMCI - optional n ONU authentication based on Registration ID - mandatoryn mutual

40、authentication thru OMCI - optional n mutual authentication based on 802.1x - optional安全特性对比安全特性对比第27页/共33页第二十七页，编辑于星期五：二十一点 十八分。Page 28Page 28Page 28ContentContentG.984.4 OMCIG.984.4 OMCIG.988 Generic OMCIG.988 Generic OMCIOMCC EstablishmentOMCC Establishmentn explicitly using the configure PORT-ID

41、 PLOAMn automatically generated after the assign ONU-id PLOAM, see slideOMCI message integrity OMCI message integrity protectionprotectionn CRC-32 within OMCI AAL5 trailer, as specified in I.3165n 32-bits in OMCI MIC trailer. Generated from AES-CMAC, see slide OMCI encryptionOMCI encryptionn OLT explicitly issuing the encrypted_port-ID PLOAMn OLT implicitly issues OMCI messages with a non-zero key indexSupported MIB Supported MIB informationinformationn G.984.4 whole MIBn Removed: Removed: n L3 service; n 802.11 servicen Newly