年 本課程培訓目掌握G.709協議基本內熟悉G.709幀結構中的關鍵開銷字2內容提100GOTN業務需求趨

業務需求引導光傳送技術演進方

傳輸（容量、距離、速率傳送技術應對IPIPover

ServiceSTM-模型二

IPoverOTN技術標為何引入OTN技術 OTNemergesasa“MustTheopportunitywillincreasesubstantiallyoverthenextfiveOTNOpticalTransport強大的網維管理功能（電層開銷，光層開銷運營成本降低（網絡層次減少 WDM&OTN標準G.709接 電層控制平

WDM技術vs.OTN技WDMOTNWDMOTN什么是G.709接G.709接OTH電交

以波分復用技術為基礎，在光層組織網

電層

FONST系列OTN功能模 層

ODUkOTUkODUkOTUk

ODUkODUkFONST系列硬FONST系列OTN信號流 信線號路OTH電交叉技

FONST系列OTN交叉架

…

OTHvs.較大幅度的降低了CAPEX和

ODUk交叉vs.包交ODUk交包低高易難GMPLS易難FOADM與

降低網絡成

λ1~λ

λ1~

λ1~

λ1~λ1~ λ1~固定波長上下設計，初期波長規劃方案復雜工程升級復雜開通業務或升級擴容周期長，可靠性

重新配置波長上下，降低運維成本支持快速業務開通，滿足波長租賃業務可自由升級擴容，實現任意波長到任意端口上下可實現波長到多個方向，實 度波長調度支持通道功率調整和通道功率均衡ROADM-WB和 A C 正向：實現任意波長到任意端反向：不同端口任意波長到同一端（避免波 ）二維節點業務的快速部署

支持任意波長到任意端口的指配，配合可調OTU，實現光網絡波長自由上下基于WSS可從升級到4維，6維和8相 開關整列構成的OXC，連纖數量受波 限制和傳輸物理損傷限PXCvs.基于OTNMESH網MESH網動態連接建抗多次故流量均不影響原業BCDCDFE控制平面功

OChPayloadUnit(OPUk)OChDataUnit(ODUk)OChTransportUnit(OTUk)Non-associatedOpticalNon-associatedOpticalChannelCarrier(OCC)OpticalMultiplexSectionOpticalTransmissionSectionOTMOverheadSignalOpticalSupervisoryChannelOpticalPhysicalSectionG.709定義的OTUk幀格OTUk:光傳送單OTUk幀開OriginaldataDatawitherrorsFECfield

Noise,CD,PMD,STM-64OTUwithFEC7-97-966–7OCh,

OCh, OCh,

OCADM：OpticalChannelAdd/DropMultiplexerODXC3R：O/E/Ow/Reamplification,Resha &RetimingandmonitoringR：RepeaterTCM開銷為復雜網絡TCM開銷為復雜網絡的管理帶來了極大的方便。網絡服務提供商可以用它 PathCMUNI-UNICMNNI-NNICM

NO NO

G.709接口優比特透明，SDH等客戶信號完整性得以保持定時（Timing）透明，恒定速率的客戶信號以比特同步映射保持時鐘，異步映射模式通OTN幀內調整控制字節恢復定時信多種業務統一傳送平臺虛級聯更高效傳交叉連接可升更大跨距段，更遠距離系統配置更加簡單，生存性更 光層電層結構完分層管理 各層都具備網絡課程提為何引入OTN與WDM技術聯系與區OTN系統與WDM系統結構聯系與區別FEC作用ROADM目前的主要應G.709接口優勢內容提100GOTNITU-T在2002年發布G.709InterfacesfortheopticaltransportG.709OpticalTransportModuleofordernOTMn)的以下需求光傳送體系OpticalTransportHierarchyOTNOTN分層結構及OTN STM- OTNODUk（ODUkP,OTM-

OTM-OTMNon-associatedNon-associatedOTM-n.m：n波分

OTM-

OChPayloadUnit(OPUk)OChDataUnit(ODUk)OChTransportUnit(OTUk)OpticalChannelCarrier(OCC)OpticalMultiplexSectionOpticalTransmissionSectionOTMOverheadSignalOpticalSupervisoryChannelOpticalPhysicalSection用戶網絡接口：UsertoNetworkInterface網絡節點接口：NetworkNodeInterface Interface Interface不同廠家設備間接口－betweenequipmentofdifferentvendors相同廠家子網內接口－withinsubnetworkofonevendor

OTM

NetworkOperatorOTM

OTM

OTN信號OTM-

OTM-OTM- 用于和其他廠家的波分設備互連（在波長級互連OTN信號-OTM-OTM-0.mOTM-0.m 有特定幀格式OTN信號-OTM-

OTM-OTM-

OTMOverheadSignal由多個波長組成，每個波長都有特定的幀格式 OTNOTNOTUk幀結FAOTUkFAOTUkClientmappedinOPUkOTUkODUk4Client

38243825…OPUk-OpticalChannelPayload

kindicatesthe1ODUk-OpticalChannelData OTUk-OpticalChannelTransport Frame

OTUk幀的特低速ODUi可完全裝入高速ODUk的凈荷，進行匯聚，開銷獨幀速率針對SDH設FEC開銷，提高OTUk幀的傳送能字節調整技術比SDH的指針調整簡開銷（不含FEC）比例低 OTUk幀可方便的接入GE或10GE以太網業OTUk,ODUk,OPUk的區別與聯OPUk1……7

38243825…OPUkOPUk234OPUk-OpticalChannelPayloadOTUk,ODUk,OPUk的區別與聯ODUk對OTUk電層交叉調 OPUkODUkOPUkODUk1234

38243825…ODUk-OpticalChannelDataOTUk,ODUk,OPUk的區別與聯OTUkFAOTUkFAOTUkOPUkOTUkODUk1234

38243825…OTUk-OpticalChannelTransportUnitFrameAlignmentOTUk,ODUk,OPUk的區別與聯OPUk幀是ODUk幀的一部分ODUk幀是OTUk幀的一部分OTN幀周幀結構和長度不變（SDH不同速率，幀長不同不同速率等級，幀周期不同（SDH固定8k幀周期OTU/ODU/OPUtype 48.971us 12.191 3.035NOTE-Theperiodisanapproximatedvalue,roundedto3OTUk,ODUk,OPUk速率等

"STM-N"*238/(239-239+16=25516/16=16

238+1=

3808/16=3808

256/16=256 38243825…OTUkUkOTUk4OTUk,ODUk,OPUk速率等k12488（24882498（24882666（248829995（955310037（955310709（9553340150（3981340319（3981343018（39813注：bitratetolerance20映射與復用

映射與復用–

映射與復用–

映射與復用–

映射與復用–

客戶信號映射—SDH業STM-16業STM-64業STM-256業客戶信號映射—OTUk業OTU1業OTU2業OTU3業OTU4業客戶信號映射—GE業GE業務映射到ODU0通道信號，映射復用遵循G.7041、G.709客戶信號映射—10GE業10GE業務的映射方式主要依據G.709和G.7041的規以GFP-F方式將10Gbase-R（LANPHY）僅有效載荷部分映射為LANMAC幀采用GFP-F封裝客戶信號映射—40GE/100GE業17.6.4章節，AnnexB,AppendixVII和AppendixVIII的要求G.70917.6.5章節，AppendixVII的要求課程提OTUk幀結構OTUk幀的特點OTUk,ODUk,OPUkOTN幀與SDH幀區別OTUk,ODUk,OPUk如何將業務載入內容提100GOTN課程提100G與40G區別內容提100GOTNOTUk OTUk4 Framealignment 0xF6F6F62828 Multiframealignment 256 1個字節，每發送一幀此字節的內容加，例如OTUkOTUkOTUkODUk ODUk4 OTUksectionmonitoringoverhead OTUkgeneralcommunicationchannel0 overhead，all"0"OTUk321 trailtraceidentifier bitinterleavedparityOTUkSMSAPI，標示源地 用戶自定義信 1123OTUkSMBIP-123OTUk123412341234123412341234FrameFramei+2FrameFramei+2Frame

OTUk12312345678 backwarderror ingalignmenterror backwarddefectindication ingalignment forfutureinternationalstandardizationallOTUk

OTUk?OTUk123412345678SM OTUk123412345678OTUkSM 123BIP00OTUkSM01

12345678有反向業務失OTUk123412345678 OTUkOTUk FEC（ForwarderrorcorrectionOTUkFECorall-(4×256OTUkFECorall-(4×2561234

3825……ODUkODUkODUkOTUk OTUk4

ODUkpathmonitoringODUktandemconnectionmonitoringODUktandemconnectionmonitoringGCC1, ODUkgeneralcommunicationAPS/PCCODUkautomaticprotectionswitchingandprotectioncommunication

ODUkfaulttypeandfaultlocationreportingcommunicationchannelODUkexperimentaloverhead ODUk 2341231231212345678| backwarderror

trailtraceidentifier

backwarddefectstatusbitsindicatingthepresenceofamaintenanceODUk123412345678ODUkPM 123BIP備BIP-8校驗后的0BIP-8校驗后無ODUk123412345678 PMbyte 67000，01011，10forfutureinternationalstandardization00Normalpath10Maintenancesignal:ODUk-11Maintenancesignal:ODUk-11Maintenancesignal:ODUk-ODUk

34ODUk1ODUk123

trailtraceidentifier12345678BEI/BIAEbackwarderrorindicationand ingalignment

backwarddefectstatusbitsindicatingthepresenceofTCM alignmenterror,oramaintenanceODUkC1-C1-B1- B3-A1-ODUk

ODUk12345612345678TCMbyte 6TCMbyte 6700Nosource00Inusewithout01Inusewith011,10forfutureinternational10Maintenancesignal:ODUk-11Maintenancesignal:ODUk-11ODUkTCMODUktandemconnectionmonitoringactivation/deactivationcoordinationItsdefinitionisforfurther 234ODUk 234ODUk 234 67connectionmonitoringlevelProtectionschemeusingtheAPS/PCCchannel(Note)00ODUkODUk00ODUkODUkSNC/S,ODUk01ODUkODUkSNC/S,ODUk01ODUkODUkSNC/S,ODUk10ODUkODUkSNC/S,ODUk10ODUkODUkSNC/S,ODUk11ODUkODUkSNC/S,ODUk11OTUkODUkODUk 234ODUk 234012ForwardBackwardForwardForwardfield0 OperatorBackwardfield OperatorODUkEXP&ODUk

34ODUkOPUkOPUkOPUkOTUkMap&onspecific OTUkMap&onspecific401……01…… &concatenationspecificandoverheadassociatedwiththe ofclientsignalsintotheOPUk payloadOPUk0101…… PT，凈荷類型，一個字節 一般對應PT失配告 except