《OTN协议介绍》PPT课件.ppt
Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.OTN协议介绍协议介绍Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 2前言l本课程主要对OTN协议进行总体介绍，其内容包括：pOTN体系、接口结构、开销pOTN路径层次和维护信号pOTN告警和性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 3培训目标l学完本课程后，您应该能：p了解OTN的分层、帧结构、维护信号和各个层次功能;p熟悉OTN电层功能的告警和性能事件的处理；p能够对WDM产品中OTN电层功能的故障进行分析定位。Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 4目录1.OTN体系简介2.OTN接口结构3.OTN复用和映射结构4.OTN开销5.OTN路径层次和维护信号6.OTN常见告警性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 5OTN定义lOTN（Optical Transport Network），光传送网络，是由一组通过光纤链路连接在一起的光网元组成的网络，能够提供基于光通道的客户信号的传送、复用、路由、管理、监控以及保护（可生存性）。OTN的一个明显特征是对于任何数字客户信号的传送设置与客户特定特性无关，即客户无关性。Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 6OTN特点l与传统SDH和SONET设备相比，OTN具有以下优势：p容量的可扩展性强，交叉容量可扩展到几十T bit/s p客户信号透明包括净荷和时钟信息等p异步映射消除了全网同步的限制，更强的FEC纠错能力，简化系统设计，降低组网成本p多达6级的TCM监视管理能力l相对于传统WDM:p有效的监视能力OAM&P和网络生存性能力p灵活的光/电层调度能力和电信级的、可管理可运营的组网能力Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 7OTN标准体系架构架构OTN光传送网络的架构G.872自动交换光网络（ASON）的架构G.8080结构与结构与映射映射通用成帧规程（GFP）G.7041虚级联信号的链路容量调整机制（LCAS）G.7042光传送网接口（OTN）G.709设备功能设备功能特征特征光传送网络体系设备功能块特征G.798传送设备特征-描述方法和一般功能G.806物理层物理层特征特征用于局内系统的光接口G.693光传送系统的光安全规程和需求G.664光传送网络的物理层接口G.959.1网络保护网络保护光传送网（OTN）：线型保护G.873.1光传送网（OTN）：环型保护G.873.2抖动和抖动和性能性能光传送网络（OTN）内抖动和漂移的控制G.8251光传送网络（OTN）内部多运营商国际通道的误码性能参数和指标G.8201设备管理设备管理光传送网元的管理特性G.874光传送网（OTN）：网元角度的协议中立管理信息模型G.874.1Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 8目录1.OTN体系简介2.OTN接口结构接口结构3.OTN复用和映射结构4.OTN开销5.OTN路径层次和维护信号6.OTN常见告警性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 9OTN层次结构及接口LO ODUk（ODUkP、ODUkT）LO OPUkOTUk OTUkVOTUkOTUkVOChOChrOMSnOTSnOPSnIP/MPLS ATM EthernetSTM-NHO ODUk（ODUkP、ODUkT）HO OPUkOTUkOPSMnkOTM-0.mOTM-nr.mOTM-n.mOTM-0.mvnOTUk OTUkVOTUk OTUkVOChOChrOMSnOTSnOPSnOTUkOPSMnkOTM-0.mOTM-nr.mOTM-n.mOTM-0.mvnCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 10OTM-n.m基本信息包含关系ln波波分传送通道，固定信道间隔，与信号速率无关，m=1,2,3,4,1234,123,12,23,34；lOTM开销信号包括OTS、OMS、OCh开销以及通用管理信息等；l1路独立的光监控信道(OSC：Optical Supervisory Channel)用于传送OTM开销信号(OOS)。OMSn净净荷荷OCCpOCCpOCCpOCh净荷ODUkFECOHOPUkOH客户信号OPUk净荷OHOPUkODUkOTUkVOChOCG-n.mOTM-n.mOTSn净净荷荷OTSn OHOMSn OHOCCoOChOHOCCoOCCoOMU-n.m非随路开销OOS通用管理开销OTM-n.mOTM Overhead Signal(OOS)l 2l1l nlOSCCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 11OTM-nr.m基本信息包含关系ln波波分传送通道，固定信道间隔，与信号速率无关，m=1,2,3,4,1234,123,12,23,34；l无光监控信道。OPSnOCCpOCCpOCCpOCh净荷ODUkFECOHOPUkOH客户信号OPUk净荷OHOPUkODUkOTUkVOChrOCG-nr.mOTM-nr.mOTM-16r.ml 2l1l 16Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 12OTM-0.m基本信息包含关系l单通道信号，黑白光口（1310 nm或1550 nm），m=1,2,3,4；l无光监控信道。OCh净荷ODUkFECOHOPUkOH客户信号OPUk净荷OHOPUkODUkOTUkVOChrOTM-0.mOPS0OTM-0.mCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 13OTM-0.mvn基本信息包含关系lm=3,4；l无光监控信道。OTM-0.mv4l 2l1l 4l 3OTLk.n#0ODUkFECOHOPUkOH客户信号OPUk净荷OHOPUkODUkOTUkVOT LanesOTLk.n#0OTLk.n#n-1OTLCpOTLCpOTLCpOTLCGOTM-0.mvnOPSMnkCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 14OTN网络节点接口l用户网络接口:User to Network Interface(UNI)l网络节点接口:Network Node Interface(NNI)p域间接口:Inter-domain Interface(IrDI)p域内接口:Intra-domain Interface(IaDI)不同厂家设备间接口between equipment of different vendors(IrVI)不同厂家子网内接口within subnetwork of one vendor(IaVI)l完全标准化的OTUk 用于OTM IrDI 和IaDI，功能标准化OTUkV 用于OTM IaDI。OTMUNIOTM NNIIaDI-IrVIOTM NNIIaDI-IaVIOTM NNIIaDI-IaVI网络运营商网络运营商 B厂家厂家X设备设备厂家厂家Y设备设备OTMNNIIrDI网络运营网络运营商商C用户用户A Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 15目录1.OTN体系简介2.OTN接口结构3.OTN复用和映射结构复用和映射结构4.OTN开销5.OTN路径层次和维护信号6.OTN常见告警性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 16OPU0ODTUG1OPU1ODU1OTU1VODTUG2OPU2ODU2OTU2VODTUG3OPU3ODU3OTU3VODTUG4OPU4ODU4OTU4VClient signalX2X8X32X80ODU0ODUk的电层复用和映射结构映射复用Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 17OPU1ODU1OTU1VODTUG2OPU2ODU2OTU2VODTUG3OPU3ODU3OTU3VODTUG4OPU4ODU4OTU4VClient signalX4X40X16ODUk的电层复用和映射结构映射复用Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 18OPU2ODU2OTU2VODTUG3OPU3ODU3OTU3VODTUG4OPU4ODU4OTU4VClient signalX4X10OPU2eODU2eOTU2eODTUG3OPU3ODU3OTU3VODTUG4OPU4ODU4OTU4VClient signalX3X10ODUk的电层复用和映射结构Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 19ODTUG2OPU2ODU2OTU2VODTU2.tsOPUflexODUflexClient signalODTUG3OPU3ODU3OTU3VODTU3.tsODTUG4OPU4ODU4OTU4VODTU4.tsX8/tsX32/tsX80/tsOPU3ODU3Client signalOTU3VODTUG4OPU4ODU4OTU4VClient signalX2ODUk的电层复用和映射结构Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 20OTM复用和映射结构Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 21OTUk帧速率OTU类型类型OTU标称比特速率标称比特速率OTU比特速率容差比特速率容差OTU1255/238 2488320kbit/s20ppmOTU2255/237 9953280kbit/sOTU3255/236 39813120kbit/sOTU4255/22799532800kbit/s注：标称注：标称OTUk速率近似为：速率近似为：2666057.143kbit/s(OTU1)，10709225.316kbit/s(OTU2)，43018413.559kbit/s(OTU3)和和111809973.568kbit/s(OTU4)。OTUk 速率速率 255/(239-k)STM-N帧速率帧速率Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 22ODUk帧速率ODU类型类型ODU标称比特速率标称比特速率ODU比特速率容差比特速率容差ODU01244160kbit/s20ppmODU1239/238 2488320kbit/sODU2239/237 9953280kbit/sODU3239/236 39813120kbit/sODU4239/22799532800kbit/sODU2e239/23710312500kbit/s100ppmODUflex(CBR)239/238客户侧信号速率客户侧信号速率100ppmODUflex(GFP-F)20ppmODUk 速率速率 239/(239-k)STM-N帧速率帧速率Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 23OPUk帧速率OPU类型类型OPU净荷标称比特速率净荷标称比特速率OPU比特速率容差比特速率容差OPU0238/2391244160kbit/s20ppmOPU12488320kbit/sOPU2238/237 9953280kbit/sOPU3238/236 39813120kbit/sOPU4238/22799532800kbit/sOPU2e238/23710312500kbit/s100ppmOPUflex(CBR)clientsignalbitrate100ppmOPUflex(GFP-F)238/239ODUflexsignalrate20ppmOPU1-XvX*2488320kbit/s20ppmOPU2-XvX*238/237*9953280kbit/sOPU3-XvX*238/236*39813120kbit/sOPUk净荷速率净荷速率 238/(239-k)STM-N帧速率帧速率Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 24OTN信号的帧周期信号类型信号类型帧周期帧周期ODU0/OPU098.354 sOTU1/ODU1/OPU1/OPU1-Xv48.971 sOTU2/ODU2/OPU2/OPU2-Xv12.191 sOTU3/ODU3/OPU3/OPU3-Xv3.035 sOTU4/ODU4/OPU41.168 sODU2e/OPU2e11.767 sODUflex/OPUflexCBR 客户信号:121856/客户侧信号速率GFP-F 封装的客户信号:122368/ODUflex_速率注意：这里所列举的帧周期只是一个近似值，精确到小数点后3位Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 25ODUk 的时分复用（TDM）l时分复用可以把低阶的ODUk信号复用到高阶的ODUk信号:p2ODU0 复用到1ODU1p8ODU0/4ODU1 复用到1ODU2p32ODU0/16ODU1/4ODU2/3ODU2e 复用到1ODU3p80ODU0/40ODU1/10ODU2(e)/2ODU3 复用到1ODU4pk x ODU1 和(8-2k)x ODU0 同时复用到1xODU2(0 k 4)pj x ODU2、k x ODU1和(32-2k-8j)x ODU0 同时复用到1xODU3 (0 j 4,0 k 16-4j)ph x ODU3、j x ODU2、k x ODU1和(80-2k-8j-32h)x ODU0 同时复用到1xODU4 (0 h 2,0 j 10-5h,0 k 40-4j-20h)Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 26ODU1到ODU2的复用方法lODTU12:Optical channel Data Tributary Unit 1 into 2 光通道数据支路单元1到2lODTUG2:Optical channel Data Tributary Unit Group 2 光通道数据支路单元组2lJOH:Justification Overhead 调整开销ODU1OHODU1ODU1 净荷ODTU12JOHODU1ODTU12ODU2OHOPU2OHODU2 净荷OPU2ODU2ODTU12JOHODU1ODTU12JOHODU1ODTUG2ODTUG2OPU2 净荷Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 27ODU1和ODU2到ODU3的复用方法lODTU23:Optical channel Data Tributary Unit 2 into 3 光通道数据支路单元2 到3lODTU13:Optical channel Data Tributary Unit 1 into 3 光通道数据支路单元1 到3ODU1OHODU1ODU1 PayloadODTU13JOHODU1ODTU13ODU3OHOPU3OHODU3 PayloadOPU3ODU3ODTU23JOHODTU23JOHODU1ODTUG3ODTUG3OPU3 PayloadODU2OHODU2ODU2 PayloadODTU23JOHODU2ODTU23ODTU13JOHODU2ODTU13JOHODU2ODU1Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 28目录1.OTN体系简介2.OTN接口结构3.OTN复用和映射结构4.OTN开销开销5.OTN路径层次和维护信号6.OTN常见告警性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 29电层开销帧结构(k=1,2,3)382540801781415161738241234OPUk 净荷净荷OPUk开销开销OPUk-光通道净荷单元光通道净荷单元ODUk开销开销ODUk光通道数据单元光通道数据单元客户信号客户信号客户信号客户信号OTUkFECOTUk开销开销OTUk光通道传送单元光通道传送单元帧对齐帧对齐帧对齐开销帧对齐开销k:12.5G210G340GCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 30OTN电层开销总览lODUk层开销层开销pTCMACT:TCM激活/去激活协调协议控制通道pTCMi:串行连接监视子层i开销pFTFL:故障类型和故障位置上报通道pPM:通道监控pEXP:实验通道pGCC1/2:通用通信通道1/2pAPS/PCC:自动保护倒换和保护通信控制通道假设l 帧对齐开销帧对齐开销pFAS:帧对齐信号pMFAS:复帧对齐信号lOTUk层开销层开销pSM:段监控pGCC0:通用通信通道0pRES:保留作国际标准化用途开销lOPUk层开销层开销pPSI:净荷结构标识符pJC:调整控制pNJO:负调整机会字节RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASMFASSMGCC0RES JCRESCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 31帧对齐开销FAS字节1字节2字节3字节4字节5字节61 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8OA1OA1OA1OA2OA2OA2RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASMFASSMGCC0RES JCRESlFAS(FrameAlignmentSignal)p用于帧对齐和定位；p长度为6个字节，位于第1行第16列；p内容为3个OA1+3个OA2，OA1为0 xF6，OA2为0 x28。Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 32复帧对齐开销MFASMFAS OH ByteMFAS序列序列1 2 3 4 5 6 7 80 0 0 0 0 0 0 00 0 0 0 0 0 0 10 0 0 0 0 0 1 00 0 0 0 0 0 1 10 0 0 0 0 1 0 0.1 1 1 1 1 1 1 01 1 1 1 1 1 1 10 0 0 0 0 0 0 00 0 0 0 0 0 0 1.lMFAS(MultiFrameAlignmentSignal)p用于复帧对齐和定位；p长度为1个字节，位于第1行第7列；pMFAS字节的数值随着OTUk/ODUk基帧序号递增，最多包括256个基帧；p各个复帧结构的开销可根据具体的需要调整复帧长度。RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASSMGCC0RES JCRESMFASCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 33OTUk段监控开销SMlTTI(路径追踪标识符路径追踪标识符)p64个字节的TTI信号应该与OTUk复帧对齐，每个复帧中发送4次；pTTI信号构成：n16字节源接入点标识符；n16字节目的接入点标识符；n32字节运营商自定义内容。OperatorspecificTTIBIP-8BEI/BIAEBDIRES12345678123IAE63320151631SAPIDAPIRES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASGCC0RES JCRESMFASSMCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 34OTUk段监控开销SMlBIP-8(BitInterleavedParity-8)p用于OTUk级别误码检测，采用比特间插偶校验编码；p长度为1个字节，位于SM开销的第二个字节；p对第i个OTUk帧中的OPUk(列153824)区域内的比特计算得出OTUk BIP-8，并将结果插入到第i+2个OTUk帧的OTUk BIP-8开销位置。BIP8OPUk114153824帧帧i帧帧i+1帧帧i+2Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 35OTUk段监控开销SMlBEI/BIAE(BackwardErrorIndication/BackwardIncomingAlignmentError)lBDI(BackwardDefectIndication)lIAE(IncomingAlignmentError)lRES(Reserved)OperatorspecificTTIBIP-8BEI/BIAEBDIRES12345678123IAE63320151631SAPIDAPIRES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASGCC0RES JCRESMFASSMCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 36OTUk通用通信通道开销GCC0/保留开销RESlGCC0(GeneralCommunicationChannel)p通用通信通道开销0，用于支持OTUk终端间的通用通信；p长度为2个字节，位于第1行第1112列；p为透明通道。lRES(Reserved)pOTUk保留字节，留作将来国际标准化；p长度为2个字节，位于第1行第1314列；p设置为全0。RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4PMTCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASRES JCRESMFASSMGCC0Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 37ODUk通道监控开销PMlTTI/BIP-8/BEI/BDIp支持通道监视，这几部分的定义和作用与OTUk开销SM中相应部分相同，只是监控级别不同，另外BEI字段不同时具备SM中的BIAE开销功能；p位于第3行第1012列。OperatorspecificTTIBIP-8BEIBDISTAT1 2 3 4 5 6 7 812363320151631SAPIDAPIRES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4TCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASRES JCRESMFASSMGCC0PMCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 38ODUk通道监控开销PMOperatorspecificTTIBIP-8BEIBDISTAT1 2 3 4 5 6 7 812363320151631SAPIDAPIRES123456789101112131415161234TCM3TCM6TCM5TCM2TCM1TCM4TCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASRES JCRESMFASSMGCC0PM比特比特678状态状态0 0 0保留0 0 1正常0 1 0保留0 1 1保留1 0 0保留1 0 1维护信号:ODUk-LCK 1 1 0维护信号:ODUk-OCI 1 1 1维护信号:ODUk-AIS lSTAT(Status)p用于ODUk通道级别的维护信号；p长度为3个比特，位于第3行的第12列的低3位。Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 39ODUk TCM子层监控开销TCMilTTIi/BIP-8i/BEIi/BIAEi/BDIip支持TCMi子层监视，这几部分的定义和作用与OTUk开销SM中相应部分相同，只是监控级别不同；pTCM6TCM1依次位于第2行的第513列、第3行的第19列。TTIiBIP-8iBEIi/BIAEiBDIiSTATi1234567812363320151631SAPIDAPIOperatorspecificRES123456789101112131415161234TCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASRES JCRESMFASSMGCC0PMTCM1TCM2TCM3TCM6TCM5TCM4Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 40ODUk TCM子层监控开销TCMiTTIiBIP-8iBEIi/BIAEiBDIiSTATi1234567812363320151631SAPIDAPIOperatorspecificRES123456789101112131415161234TCMACTGCC1FTFLRES JCRES JCNJOPSIGCC2APS/PCCRESEXPFASRES JCRESMFASSMGCC0PMTCM1比特比特678状态状态0 0 0没有源TC0 0 1TC在用，没有IAE错误0 1 0TC在用，存在IAE错误0 1 1保留1 0 0保留1 0 1维护信号:TCMi-LCK 1 1 0维护信号:TCMi-OCI 1 1 1维护信号:TCMi-AIS TCM2TCM3TCM6TCM5TCM4lSTAT(Status)p用于TCMi子层的维护信号，以及源TC-CMEP处是否存在IAE错误、源TC-CMEP是否被激活；p长度为3个比特，位于TCMi字段的低3位。Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 41多级TCM层叠和嵌套A1B1C1C2B2B3B4A2A1-A2B1-B2C1-C2B3-B4TCM1TCM1TCM2TCM1TCM2TCM3TCM1TCM2TCM1TCM1TCM2TCM1TCM2TCM3TCM4TCM5TCM6TCMi未使用的TCM开销域TCMi使用的TCM开销域TCM2TCM3TCM4TCM5TCM6TCM2TCM3TCM4TCM5TCM6TCM3TCM4TCM5TCM6TCM3TCM4TCM5TCM6TCM3TCM4TCM5TCM6TCM4TCM5TCM6Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 42多级TCM重叠和嵌套A1B1C1C2B2A2A1-A2B1-B2C1-C2TCM1TCM1TCM2TCM1TCM2TCM3TCM1TCM2TCM1TCMi未使用的TCM开销域TCMi使用的TCM开销域TCM2TCM3TCM4TCM5TCM6TCM2TCM3TCM4TCM5TCM6TCM3TCM4TCM5TCM6TCM3TCM4TCM5TCM6TCM4TCM5TCM6Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 43ODUk通用通信通道开销GCC1/GCC2RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM4TCMACTGCC1FTFLRES JCRES JCNJOPSIAPS/PCCRESEXPFASRES JCRESMFASSMGCC0PMTCM1GCC2lGCC1/GCC2(GeneralCommunicationChannel1/2)p通用通信通道开销1和2，用于支持接入到ODUk帧结构(即位于3R再生点)的任何两个网元之间的通用通信；p长度均为2个字节，分别位于第4行的第12列、第34列；Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 44其他开销123456789101112131415161234TCM3TCM6TCM5TCM2TCM4TCMACTGCC1PSIFASRESMFASSMGCC0PMTCM1GCC2lTCMACT（TCMActivation/Deactivation）TCM激活激活/去激活去激活lAPS/PCC（AutomaticProtectionSwitching/ProtectionCommunicationControl）自动保护倒换和保护通信信道）自动保护倒换和保护通信信道lEXP（Experimental）实验开销）实验开销lFTFL（FaultType&FaultLocation）前向）前向/反向故障类型指示域反向故障类型指示域lJC/NJO/RES（justificationcontrol/negativejustificationopportunity/reserved）调整控制字节）调整控制字节/负调整机会字节负调整机会字节/保留字节保留字节p定义有待进一步研究.EXPFTFLAPS/PCCRES JCRES JCNJORES JCRESRESCopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 45OPUk净荷结构标识开销PSIlPSI(PayloadStructureIdentifier)p用于传送256字节的净荷结构标识符(PSI)信号；p长度为1个字节，位于第4行的第15列；pPSI信号与ODUk复帧对齐；pPSI0为一个字节的净荷类型（PT），PSI1到PSI255 用于映射和级联。25501PT映射和级联特定开销映射和级联特定开销 RES123456789101112131415161234TCM3TCM6TCM5TCM2TCM4TCMACTGCC1RES JCRES JCNJOAPS/PCCRESEXPFASRES JCRESMFASSMGCC0PMTCM1GCC2FTFLPSICopyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 47目录1.OTN体系简介2.OTN接口结构3.OTN复用和映射结构4.OTN开销5.OTN路径层次和维护信号路径层次和维护信号6.OTN常见告警性能Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 48OTN 维护层次OChnTTIBDI-PBDI-OPMIFDI-OBDI-PBDI-OPMIFDI-POTSOMSFDI-PFDI-OOCIOCh1OCh2General management communications1234FASEXPTCMACTTCM4TCM3TCM2TCM6GCC1GCC2FTFLPMRESRESAPS/PCCSMRESGCC0MFASJCJCJCNJO PJORESRESRESTCM5TCM1116781415PSIOTSOTSOTSOTSOTSOTSOTSOMSOMSOMSOMSOTMOADM/ROADMOchOchOch用户QoS 监视TCM1(UNI 到 UNI)OTN XCOEOOLAOLAOTMOTMOTMOLAOTN网络边界 OTN网络边界OTUk 段监视SMOTUk 段监视SMOTUk SM端到端的路径监视(PM)NNI to NNI TCM2NNI 到 NNI 域到域的监视 TCM2带内(电层)管理方案带外(光层)管理方案Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 49OTN 网络路径OTUOTU光合波器光放大器光放大器光分波器OTSOTSOTSOTSOMSOCHOTUkODUkClient光监控板OSC光监控板Copyright 2009 Huawei Technologies Co.,Ltd.All rights reserved.Page 50电层提供的维护和管理信号管理功能管理功能信号信号网络层次网络层次OTUkODUkPODUkT定位监控定位监控L
