GGPON技术基础学习教案

1、会计学1GGPON技术基础技术基础Page 2GPON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Page 3 GPON 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

2、层开销分配GPONGPON标准协议标准协议第2页/共33页Page 4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 通过过滤来通过过滤来接收属于自己的数据。接收属于自己的数据。GPONGPON原理原理-下行数据下行数据第3页/共33页Page 5TDMATDMA方式：方式：GPONGPON的上行是通过的上行是通过TDMATDMA（时

3、分复用）的方式传输数据，上行链路被分成不（时分复用）的方式传输数据，上行链路被分成不同的时隙，根据下行帧的同的时隙，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-上行数据上行数据第4页/共33页Page 6GPON GPON 协议栈协议栈第5页

4、/共33页Page 7Physical Control Block Downstream (PCBd)PayloadAllocIDStartEndAllocIDStartEnd1100200 x300500T-CONT1(ONT 1)T-CONT x(ONT 2)Slot 100Slot 200Slot 300Slot 500PLOuPLOAMuPLSuDBRu xPayload xDBRu YPayload yUpstream Bandwidth Map125usDownstream FramingUpstream FramingOLT ONT 1ONT 64GPONGPON帧结构帧结构Al

5、locIDStartEndy501650 ONT 21 1x xy yT-CONT y(ONT 2)Slot 650Slot 501T-CONT x xT-CONT y第6页/共33页Page 8GPON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Page 9Page 9FSAN把下一代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

6、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Page 10Page 10GPONXGPON1NGA1NGA22009201020112012 2.5G/10G2010.6 Publish10G/2.5GODN 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 possib

7、ility 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, Stacked， 40G, 10G/10G第9页/共33页Page 11Page 11XG-PON1: Asymmetric 10G/2.5G 10G GPONlG.987x is based on the GPON standard G.984x，and compatible with G.984.l

8、G.987x inherits the GPON characteristic, and also supports the high quality & full service experience.lG.987x 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Page 12第11

9、页/共33页Page 13第12页/共33页Page 14GPON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Page 15Page 1510G 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功率预算功率预算29dB/31dB可扩展至33dB/35d

10、BClass 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TCONT数目数目2048（其中非FIX类型的个

11、数512）最大1024（其中非FIX类型的个数512）第14页/共33页Page 16Page 16G-PMDhigher Data rateLonger distanceImproved Power budgetLarger Split ratioXG-PMDG-TCMore effective framingMore flexible DBAEnhanced Security featuresnecessary power saving featuresXG-TCGPON OMCIBackward compatibility with GPONAdaptive to future useG

12、eneric OMCIIntegrated IOP specsGeneral requirementGeneral requirementWDM coexistence & smooth migrationG.984 seriesG.987 series200803p;200910amd1200303p;200803amd1200803p;200902amd1;200911amd2;200803p;200906amd1;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

13、理层相对独立，改动影响较小。第15页/共33页Page 17Page 17ONUONUONUONUXG-ONUGPON OLTXG-ONUXG-ONUXG-ONUXG-OLTWDM1r1550 RF1550 RFGPON U/SXGPON U/SGPON D/SXGPON D/S12601280129013301480150015751580wavelength planWDM overlay p 对已部署的GPON ODN网络无影响第16页/共33页Page 18Page 18ContentContentGPONGPON10G-PON10G-PON线路速率线路速率2.5G DS / 1.25

14、G 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 US1575-1580nm 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+: 13-28dBClass

15、C: 15-30dB ClassC+: 17-32dB N1（14 29dB)N2（16 31dB) 可扩展到 33/35dB第17页/共33页Page 19Page 19featuresfeaturesitemsitemsG.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

16、-layer functionsFEC D/S - RS(255,239) , mandatory implemented and optionally on;U/S RS(248, 232), optionally 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 i

17、s x7 + x6 + 158 bit scrambler: polynomial used is x58 + x39 + 1Basic TC Basic TC parametersparametersONU ID8 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 f

18、rom 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 6.4.3)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

19、applied in U/SCould be applied in both U/S and D/SBandwidth allocation rulesConsecutive allocation;not require to cross the PHY frame boundary per burstNot recommend consecutive allocations;an ONU burst can cross the PHY frame boundary 第18页/共33页Page 20Page 20FeaturesFeaturesItemsItemsG.984.3G.984.3G

20、.987.3G.987.3FramingFramingD/S GTCn basic frame architectures are the samen fields are different in details n word alignment are required for simplifying processingn See slides 11 - 13 U/S GTCGEMServices Services mapping into mapping into GEM/XGEMGEM/XGEMn Native TDM; n Ethernet; n IP; n MPLS; n SDH

21、n Ethernetn MPLSPLOAMPLOAMOverviewn enlarged size n integrity check enhancedn robustness enhancedD/S PLOAMSimplified message systems.U/S PLAOMSimplified message systems.SecuritySecurityEncryptionKey switchover changed.AuthenticationAuthentication enhanced.Power Power ManagementManagementNot a formal

22、 standardized contentPick up two modes for power saving, see slide.第19页/共33页Page 21Page 21PLOAMOMCIGEMGTC Framing sublayerGPON PMDPLOAMOMCIGEMOMCI adapterGEM adapterDBA controlGPON PMDXG-PON adaptation layerXGTC PHY adaptation sublayerGTC Framing sublayerHeaderGEM/XGEM payloadHeaderGTC/XGTC payloadU

23、ser dataGTC/XGTC payloadFEC 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

24、页/共33页Page 22Page 22PCBdGTC PayloadPsync4bytePLOAMd13byteUS BWmapN8byteAlloction struction 18byteIdent4byteAlloction struction28byte.Alloction structionN8 byteBIP1 bytePlend4bytePlend4byteUS BWmapN8byteFEC Ind1 bitREV1 bitSuperframe counter30bitBlen12bitAlen12bitCRC8 bitAlloc-ID12 bitFlags12bitSStar

25、t2byteSStop2byteCRC1byteXGTC headerXGTC PayloadHLend4bytePLOAMdsP48byteBWmapN*8byteAlloction struction18byteAlloc-ID14bitFlags2bitStart time2 byteGrant Size2byteBProfile2bitHEC13bitBWmapN8byteBWMap length11bitPLOAM count8bitHEC13bitAlloction struction28byte.Alloction structionN8byteFWI1 bitGTC heade

26、rGTC payload125us第21页/共33页Page 23Page 23PreambleDelimiterBIP1byteONU- ID1byteInd1bytePLOAMu13 or 0byteDBRuGTC PayloadDBRuGTC PayloadAllocationAllocation.DBA1|2byteCRC1byteBurst headerPLOuONU-ID10 bitInd9bitBIP1byteDBRuGTC PayloadDBRuGTC PayloadAllocationAllocation.BuffOcc3byteCRC1byteHEC13bitXGTChea

27、derXGTCTrailerPLOAMu0 or 48byte burst i125us burst j burst k第22页/共33页Page 24Page 24p 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 carried in dedicated XGEM Port ID 0 xFFFF;n size equal to multiple of 4; n

28、 the content is not defined.XGEM PayloadXGEMheaderPLI14bitKey Index2bitXGEM Port - ID16 bitOptions18bitLF1 bitHEC13bitGEM PayloadL byteGEMheaderPLI12bitPort ID12bitPTI3bitHEC13bitPayloadheader第23页/共33页Page 25Page 25G.984.3G.984.3G.987.3G.987.3StructureStructuresizesize13 bytes48 bytesrateratel D/S:

29、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 robustnessweakenhanced Message integrity checkMessage integrity checkCRC-8AES-CMAC消息对比消息对比ONU IDMessage IDDataCRCOctets11101ONU IDMess

30、age IDMessage contentMICSeqNoOctets1-2345-4041-48第24页/共33页Page 26Page 26FunctionsFunctionsG.984.3G.984.3G.987.3G.987.3PHY framing features PHY framing features configurationconfigurationnUpstream_OverheadnExtended_Burst_Length nProfileActivationActivationn Assign_ONU-ID n Ranging_Time n Deactivate_O

31、NU-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 Protection auto SwitchoverProtection auto Switchovern PSTn PSTEncryption Key relatedEncryption Key relatedn request_keyn Key_swithcing_timen Key_Cont

32、rolPower savingPower savingn nonen Sleep_AllowAuthenticationAuthenticationn Request Passwordn Request_RegistrationError controlError controln No message;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Page 27Page 27Fu

33、nctionsG.984.3G.984.3G.987.3G.987.3Activationn Serial_Number_ONUn Serial_Number_ONU Encryption Key relatedn Encryption_Keyn Key_ReportAuthenticationn Passwordn RegistrationProtection auto switchovern PSTn PSTError controln No message;n REI.n noneTrouble shootingn Dying-Gaspn noneRobustness checkn AC

34、Kn ACKPower savingn nonenSleep request消息对比消息对比第26页/共33页Page 28Page 28FeaturesFeaturesG.984.3G.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-128Encryp

35、tion Key updateEncryption Key updaten superframe counter is used for keeping sync since 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 Unic

36、ast (mandatory)n D/S Unicast (mandatory)n D/S multicast (optional)n U/S unicast (optional)Managing integrity Managing integrity protectionprotectionn PLOAM CRC8n OMCI CRC32n PLOAM AES-CMACn OMCI- AES-CMACAuthenticationAuthenticationn ONU authentication based on PSWD - optionaln mutual authentication

37、 thru OMCI - optional n ONU authentication based on Registration ID - mandatoryn mutual 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Page 29Page 29Page 29ContentContentG.984.4 OMCIG.984.4 OMCIG.988 Generic OMCIG.988 Generic OMCIOMCC Estab

38、lishmentOMCC Establishmentn explicitly using the configure PORT-ID 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 Remo