GGPON技術基礎學習教案

1、會計學1GGPON技術基礎技術基礎Page 2GPON技術回顧技術回顧10G GPON標準和進展標準和進展10G GPON技術基礎技術基礎10G GPON演進演進第1頁/共33頁Page 3 GPON TC層規(guī)格要求 GTC復用結構及協(xié)議棧介紹GTC幀結構介紹 ONU注冊激活流程DBA規(guī)格要求 告警和性能ITU-T G-984.1/2/3/4產(chǎn)品開發(fā)簡單產(chǎn)品開發(fā)簡單產(chǎn)品兼容性強產(chǎn)品兼容性強GPON網(wǎng)絡參數(shù)說明 保護倒換組網(wǎng)要求 OMCI消息結構介紹OMCI設備管理框架OMCI實現(xiàn)原理簡述 PMD層規(guī)格要求 2.488Gbps下行光接口參數(shù)規(guī)格要求 1.244Gbps上行光接口參數(shù)規(guī)格要求 物理

2、層開銷分配GPONGPON標準協(xié)議標準協(xié)議第2頁/共33頁Page 4廣播方式：廣播方式：GPONGPON的下行幀長為固定的的下行幀長為固定的125us125us，下行為廣播方式，所有的，下行為廣播方式，所有的ONUONU都能收都能收到相同的數(shù)據(jù)，但是通過到相同的數(shù)據(jù)，但是通過GEMPORT IDGEMPORT ID來區(qū)分不同的業(yè)務的數(shù)據(jù)，來區(qū)分不同的業(yè)務的數(shù)據(jù)，ONU ONU 通過過濾來通過過濾來接收屬于自己的數(shù)據(jù)。接收屬于自己的數(shù)據(jù)。GPONGPON原理原理-下行數(shù)據(jù)下行數(shù)據(jù)第3頁/共33頁Page 5TDMATDMA方式：方式：GPONGPON的上行是通過的上行是通過TDMATDMA（時

3、分復用）的方式傳輸數(shù)據(jù)，上行鏈路被分成不（時分復用）的方式傳輸數(shù)據(jù)，上行鏈路被分成不同的時隙，根據(jù)下行幀的同的時隙，根據(jù)下行幀的upstream bandwidth mapupstream bandwidth map字段來給每個字段來給每個ONUONU分配上行時隙，這樣所分配上行時隙，這樣所有的有的ONUONU就可以按照一定的秩序發(fā)送自己的數(shù)據(jù)了，不會產(chǎn)生為了爭奪時隙而沖突。每幀共有就可以按照一定的秩序發(fā)送自己的數(shù)據(jù)了，不會產(chǎn)生為了爭奪時隙而沖突。每幀共有91209120個時隙。個時隙。GPONGPON原理原理-上行數(shù)據(jù)上行數(shù)據(jù)第4頁/共33頁Page 6GPON GPON 協(xié)議棧協(xié)議棧第5頁

4、/共33頁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幀結構幀結構Al

5、locIDStartEndy501650 ONT 21 1x xy yT-CONT y(ONT 2)Slot 650Slot 501T-CONT x xT-CONT y第6頁/共33頁Page 8GPON技術回顧技術回顧10G GPON標準和進展標準和進展10G GPON技術基礎技術基礎10G GPON演進演進第7頁/共33頁Page 9Page 9FSAN把下一代PON分成了兩個階段:NGA1是在TDMA PON的基礎上做更高的速度。其速率定義為10Gbps。NGA2是對NG-PON1一些更可能的技術升級和一些模糊目標的探討。比如象：WDM PON, OFDM 等等。 NG-PON可以很好的

6、應用于FTTx，如企業(yè)用戶，個人用戶和移動回傳等。10G GPON10G GPON的標準發(fā)展（的標準發(fā)展（1 1）第8頁/共33頁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頁/共33頁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頁/共33頁Page 12第11

9、頁/共33頁Page 13第12頁/共33頁Page 14GPON技術回顧技術回顧10G GPON標準和進展標準和進展10G GPON技術基礎技術基礎10G GPON演進演進第13頁/共33頁Page 15Page 1510G GPON（G.987）GPON（G.984）波長范圍波長范圍DS 15751580nm US 12601280nmDS 1480-1500nmUS 1260-1360nm速率速率DS 9.95328GbpsUS 2.48832GbpsDS 2.48832GbpsUS 1.24416Gbps/2.48832Gbps功率預算功率預算29dB/31dB可擴展至33dB/35d

10、BClass A: 5-20dBClass B: 10-25dBClass C: 15-30dBClass C+: 17-32dB最大邏輯距離最大邏輯距離 60km（目前樣機規(guī)格為100km）60km最大距離差最大距離差 20km（目前樣機規(guī)格為40km）20km最大分支比最大分支比 1：64（目前樣機規(guī)格為1：256）1：64FEC下行：強FEC（強制實現(xiàn)，強制使用）上行：弱FEC（強制實現(xiàn)，可選使用）上下行FEC強度一致，都是強制實現(xiàn)，可選使用幀結構幀結構XGEMGEM認證認證OLT和ONU雙向認證OLT對ONU單向認證每每PON口支持口支持TCONT數(shù)目數(shù)目2048（其中非FIX類型的個

11、數(shù)512）最大1024（其中非FIX類型的個數(shù)512）第14頁/共33頁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層的改進體現(xiàn)了運營商對下一代PON設計的基本思路；pTC層的改進提供了對下一代PON網(wǎng)絡的系統(tǒng)級適配；p管

13、理層相對獨立，改動影響較小。第15頁/共33頁Page 17Page 17ONUONUONUONUXG-ONUGPON OLTXG-ONUXG-ONUXG-ONUXG-OLTWDM1r1550 RF1550 RFGPON U/SXGPON U/SGPON D/SXGPON D/S12601280129013301480150015751580wavelength planWDM overlay p 對已部署的GPON ODN網(wǎng)絡無影響第16頁/共33頁Page 18Page 18ContentContentGPONGPON10G-PON10G-PON線路速率線路速率2.5G DS / 1.25

14、G US10G DS / 2.5G or 5G US 精確線路速率精確線路速率2.48832 Gb/s D/S 9.95328 Gb/s D/S / 2.48832 Gb/s U/S 波長范圍波長范圍1480-1550nm DS1290-1330nm US1575-1580nm DS1260-1280nm US分光比分光比32/6464最大傳輸距離最大傳輸距離20 km (Logical: 60 km) 20km(Logical: 60 km) 最大差分距離最大差分距離20KmUp to 40km光功率預算光功率預算ClassB: 10- 25dB Class B+: 13-28dBClass

15、C: 15-30dB ClassC+: 17-32dB N1（14 29dB)N2（16 31dB) 可擴展到 33/35dB第17頁/共33頁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頁/共33頁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頁/共33頁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、頁/共33頁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頁/共33頁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頁/共33頁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頁/共33頁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消息對比消息對比ONU IDMessage IDDataCRCOctets11101ONU IDMess

30、age IDMessage contentMICSeqNoOctets1-2345-4041-48第24頁/共33頁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消息對比消息對比第25頁/共33頁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消息對比消息對比第26頁/共33頁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安全特性對比安全特性對比第27頁/共33頁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