10G_GPON技术基础

1、HUAWEI TECHNOLOGIES CO., LTDHuawei Confidential Security Level: 2021-11-1810G GPON10G GPON技术基础技术基础HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 2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HUAWEI TECHNOLOGIES CO., LTD.HUAWEI Confidential Page 3ITU-T G.984.3GPON TC层规格要求GTC复用结构

2、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ITU-T G.984.1GPON网络参数说明保护倒换组网要求ITU-T G.984.4OMCI消息结构介绍OMCI设备管理框架OMCI实现原理简述ITU-T G.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GPONGPON标准协议标准协议HUAWEI TECHNOLOGIES CO., LTD.HUAWEI Confidential Page 4 广播方式：广播方

3、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都能收到相同的数据，但是通过都能收到相同的数据，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 通过过滤来接收属于自己的数据。通过过滤来接收属于自己的数据。GPONGPON原理原理-下行数据下行数据HUAWEI TECHNOLOGIES CO., LTD.HUAWEI Confidential Page 5 TDMATDMA方式：方式：GPONGPON的上行是通过的上行是通过TDMATDMA（时分

4、复用）的方式传输数据，上行链路（时分复用）的方式传输数据，上行链路被分成不同的时隙，根据下行帧的被分成不同的时隙，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，这样所有的分配上行时隙，这样所有的ONUONU就可以按照一定的秩序发送自己的数据了，不会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HUAWEI TECHNOLOGIES CO., LTD.HUAWE

5、I Confidential Page 6GPON GPON 协议栈协议栈HUAWEI TECHNOLOGIES CO., LTD.HUAWEI Confidential 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 Ba

6、ndwidth 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 yHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 8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HUAWEI TECHNOLOGIES

7、CO., LTD.Huawei Confidential 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）HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 10Page 10GPONXGPON1NGA1N

8、GA22009201020112012 2.5G/10G2010.6 Publish10G GPON的标准发展（2）10G/2.5GODN reuseODN reuse is not obligation l ITU NGA1 XGPON1： 10G GPON Asymmetric： Published G.987.1&G.987.2 ; G.987.3&G. 988 was published in June 2010.l ITU NGA1 XGPON2： 10G GPON Symmetric： Discussion starts in 2010.Q1. One possib

9、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/10GHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 11Page 1110G GPON的标准发展（3）XG-PON1: Asymmetric 10G/2.5G 10G GPONlG.987x is base

10、d 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.987x shares the same management mechanism, and can realizes easy upgrade from the current GPON OSS system;lG.987.1， G.987.2： Finished

11、in Oct. 2009;lG.987.3， G.988(G.OMCI)：Finished in June 2010.HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 1210G GPON产业链发展HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 1310G GPON10G GPON设备厂家现状设备厂家现状HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 14目录GPON技术回顾技术回顾10G GPON标准和进展标准和进展

12、10G GPON技术基础技术基础10G GPON演进演进HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 15Page 1510G GPON10G GPON和和GPONGPON产品规格的主要差异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

13、功率预算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

14、持TCONT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）HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 16Page 16GPON V.S. 10G GPON GPON V.S. 10G GPON 关键改进点关键改进点G-PMDhigher Data rateLonger distanceImproved Power budgetLarger Split ratioXG-PMDG-TCMore effective framingMore flexible DBAEnhanced Secu

15、rity featuresnecessary power 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;2

16、00911amd2;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管理层相对独立，改动影响较小。HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 17Page 17G.987.1 V.S. G.984.1 G.987.1 V.S. G.984.1 通过通过WDM overlayWDM overlay实现共存实现共存ONUONUONUONUXG-ONUGPON OLTXG-ONUXG

17、-ONUXG-ONUXG-OLTWDM1r1550 RF1550 RFGPON U/SXGPON U/SGPON D/SXGPON D/S12601280129013301480150015751580wavelength planWDM overlay G.984.5amd1p 对已部署的GPON ODN网络无影响HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 18Page 18G.987.2 V.S. G.984.2 - G.987.2 V.S. G.984.2 - 更快，更多，更远更快，更多，更远ContentContentGP

18、ONGPON10G-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 US1575-1580nm 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

19、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 33/35dBHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 19Page 19G.987.3 V.S. G.984.3 - G.987.3 V.S. G.984.3 - 增强和改进增强和改进featuresfeaturesitemsitemsG.984.3G.984.3G.987.3G.987.3Whole lookWhole lookPr

20、otocol 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 implemented and optionally on.D/S - RS(248, 216), man

21、datory 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 bit length; thus support up to 256 split ration. (See

22、 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 6.4.3)GEM ID12 bit length; thus support value range from

23、 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 require to cross the PHY frame boundary per burstNot recomm

24、end consecutive allocations;an ONU burst can cross the PHY frame boundary pTC层对比HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 20Page 20G.987.3 V.S. G.984.3 - G.987.3 V.S. G.984.3 - 增强和改进增强和改进FeaturesFeaturesItemsItemsG.984.3G.984.3G.987.3G.987.3FramingFramingD/S GTCn basic frame architecture

25、s are the samen fields 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 integrit

26、y check enhancedn 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

27、 slide.HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 21Page 21G.987.3 V.S. G.984.3 - G.987.3 V.S. G.984.3 - 分层对比分层对比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 Fr

28、aming sublayerHeaderGEM/XGEM payloadHeaderGTC/XGTC payloadUser dataGTC/XGTC payloadFEC data PSBdScrambled PHY frame payloadGTC/XGTC framePFEC data PFEC data POMCI adapterGEM adapterDBA controlGPON adaptation layerFEC codeword FEC codewordFEC codeword GEM/XGEM framing GTC/XGTC frame GTC/XGTC framing

29、FEC + scrambling + PHY headerGPON TC layerXG-PON TC layerHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 22Page 22G.987.3 V.S. G.984.3 G.987.3 V.S. G.984.3 帧结构对比帧结构对比p 下行GTC/XGTC帧结构G.984.3 GTC D/S G.984.3 GTC D/S frame structureframe structureG.987.3 GTC D/S G.987.3 GTC D/S frame structurefram

30、e structurePCBdGTC PayloadPsync4bytePLOAMd13byteUS BWmapN 8byteAlloction struction 18byteIdent4byteAlloction struction28byte.Alloction structionN8byteBIP1bytePlend4bytePlend4byteUS BWmapN 8byteFEC Ind1bitREV1bitSuperframe counter30bitBlen12bitAlen12bitCRC8bitAlloc-ID12bitFlags12bitSStart2byteSStop2b

31、yteCRC1byteXGTC headerXGTC PayloadHLend4bytePLOAMdsP 48byteBWmapN*8byteAlloction struction 18byteAlloc-ID14bitFlags2bitStart time2byteGrant Size2byteBProfile2bitHEC13bitBWmapN 8byteBWMap length11bitPLOAM count8bitHEC13bitAlloction struction28byte.Alloction structionN8byteFWI1bitGTC headerGTC payload

32、125usHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 23Page 23p 上行帧结构G.984.3 GTC U/S frame structureG.987.3 GTC U/S frame structureG.987.3 V.S. G.984.3 G.987.3 V.S. G.984.3 帧结构对比帧结构对比PreambleDelimiterBIP1byteONU-ID1byteInd1bytePLOAMu13 or 0byteDBRuGTC PayloadDBRuGTC PayloadAllocationAllocation

33、.DBA1|2byteCRC1byteBurst headerPLOuONU-ID10 bitInd9 bitBIP1 byteDBRuGTC PayloadDBRuGTC PayloadAllocationAllocation.BuffOcc3 byteCRC1 byteHEC13bitXGTCheaderXGTCTrailerPLOAMu0 or 48 byte burst i125us burst j burst kHUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 24Page 24p the fragmentation rule

34、 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 the content is not defined.pGEM/XGEM 帧结构G.984.3 GEM frame G.984.3 GEM frame structurestructureG.987.3 GEM

35、frame G.987.3 GEM frame structurestructureG.987.3 V.S. G.984.3 G.987.3 V.S. G.984.3 帧结构对比帧结构对比XGEM PayloadXGEMheaderPLI14bitKey Index2bitXGEM Port -ID16bitOptions18bitLF1bitHEC13bitGEM PayloadL byteGEMheaderPLI12bitPort ID12bitPTI3bitHEC13bitPayloadheaderHUAWEI TECHNOLOGIES CO., LTD.Huawei Confident

36、ial Page 25Page 25p 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 robustnessweakenhanced

37、 Message integrity checkMessage integrity checkCRC-8AES-CMACG.987.3 V.S. G.984.3 PLOAMG.987.3 V.S. G.984.3 PLOAM消息对比消息对比ONU IDMessage IDDataCRCOctets11101ONU IDMessage IDMessage contentMICSeqNoOctets1-2345-4041-48HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 26Page 26p 下行PLOAM消息FunctionsFunc

38、tionsG.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_ONU-ID n Disable_Serial_ Number n Assign_Alloc-ID n POP-UPn Assign_ONU-ID n Ranging_Ti

39、me 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_ControlPower savingPower savingn nonen Sleep_AllowAuthenticationAuthenticationn Request P

40、asswordn Request_RegistrationError controlError controln No message;n PEE.n noneOMCC build-upOMCC build-upn Configure Port-IDn noneGEM encryptionGEM encryptionnEncrypted_Port-IDnnoneG.987.3 V.S. G.984.3 PLOAMG.987.3 V.S. G.984.3 PLOAM消息对比消息对比HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 27Pa

41、ge 27p 上行PLOAM消息FunctionsG.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 noneRo

42、bustness checkn ACKn ACKPower savingn nonenSleep requestG.987.3 V.S. G.984.3 PLOAMG.987.3 V.S. G.984.3 PLOAM消息对比消息对比HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 28Page 28p 增强安全特性FeaturesFeaturesG.984.3G.984.3G.987.3G.987.3Threat modelThreat modeln D/S transmission sniffingn D/S transmission

43、 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 there is only D/S encryption requiredn its initiated by the OLT and there are several communic

44、ations 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 (optional)Managing integrity Managing integrity protectionprotectionn PLOAM CRC8n OMCI CRC32n PLOAM AE

45、S-CMACn OMCI- AES-CMACAuthenticationAuthenticationn ONU authentication based on PSWD - optionaln mutual authentication thru OMCI - optional n ONU authentication based on Registration ID - mandatoryn mutual authentication thru OMCI - optional n mutual authentication based on 802.1x - optionalG.987.3

46、V.S. G.984.3 G.987.3 V.S. G.984.3 安全特性对比安全特性对比HUAWEI TECHNOLOGIES CO., LTD.Huawei Confidential Page 29Page 29Page 29ContentContentG.984.4 OMCIG.984.4 OMCIG.988 Generic OMCIG.988 Generic OMCIOMCC EstablishmentOMCC Establishmentn explicitly using the configure PORT-ID PLOAMn automatically generated af

47、ter 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 me