OTN技术概述学习教案

1、会计学1OTN技术技术(jsh)概述概述第一页，共65页。第1页/共64页第二页，共65页。第2页/共64页第三页，共65页。高速数字传输网第一代第二代第三代主要传送业务语音语音，少量数据数据，少量语音业务特点确定 为主确定+突发突发为主业务量较少较多多（爆炸式增长）业务承载光纤+单波长光纤+单波长光纤+多波长典型业务速率STM-16OTU2业务标准T1/E1SONET/SDHOTN标准“法典”G.707G.709第3页/共64页第四页，共65页。n传送层的网络管理和维护功能，为实现这些功能制定了丰富的维护管理开销，并对这些开销的功能和实现给出了详细的定义，有利于实现管理维护信息的互连互通(h

2、tng)第4页/共64页第五页，共65页。n比特速率n各种映射方式第5页/共64页第六页，共65页。第6页/共64页第七页，共65页。第7页/共64页第八页，共65页。第8页/共64页第九页，共65页。第9页/共64页第十页，共65页。通，所以迅速成为WDM设备的事实标准第10页/共64页第十一页，共65页。用于高速以太网业务。例如10GE LAN速率为，可以将其映射到的OTU2帧中实现完全透传第11页/共64页第十二页，共65页。n适用于大颗粒业务n在现有技术条件下，大容量时成本明显低于电交叉技术，在小容量时成本高于电交叉n传输距离可能受到色散，OSNR和非线性等光特性的限制，增加OTU中继

3、可以解决这个问题，但成本过高第12页/共64页第十三页，共65页。第13页/共64页第十四页，共65页。次Optical Multiplex Section (OMSn)layer networkOptical Transmission Section (OTSn)layer networkOptical Transport Module of order n (OTM-n, n1)IP/MPLS ATMETHERNET STM-NOTMPhysicalSection(OPSn)OTM-0OTM-nr, n1STM-NGbEInterworkingwith pre-OTNOptical Cha

4、nnel (OCh) layer network第14页/共64页第十五页，共65页。Optical Transport ModuleOPSnOTUkOptical Channel (OCh)Optical Channel Carrier (OCC)OCCOCCOCCClientODUkFECOHOCh Transport Unit (OTUk)OPUkOHOCh Data Unit (ODUk)ClientOHOCh Payload Unit (OPUk)WrapperAssociated overheadOPS0Optical Physical SectionOTM Overhead Si

5、gnalOptical Supervisory ChannelOSCOOSOSCOHOHOHNon-associated overheadOMSnOTSnOptical Multiplex SectionOptical Transmission Section第15页/共64页第十六页，共65页。n全功能OTM和简化(jinhu)OTMOMSnOTSnOTM-n.mFullfunctionalityOChOTUkVOTUkVused within OTN transparentsubnetworks; implementationsare very much technology depend

6、entOTUkODUkClients (e.g. STM-N, ATM, IP, Ethernet)OPUkODUkPODUkTOPSnOTM-0.mOTM-nr.mReducedfunctionalityOChrOChsubstructureOTUkused between (and within) OTNtransparent subnetworks第16页/共64页第十七页，共65页。(shch)的主光信号）由多个波长组成，每个波长都有特定的帧格式（OTUk）n=波长数，r=不支持光层开销(ki xio)和光监控通道，m=速率等级用于和其他厂家的波分设备互连（在波长级互连）OTM-16r

7、.m1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOver

8、headPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me AlignmentOTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)第17页

9、/共64页第十八页，共65页。o) (m=1,2,3)0=没有(mi yu)波长，没有(mi yu)光层开销，不支持光监控通道有特定帧格式（OTUk）m=速率等级用于和其他厂家的波分设备互连（OTUk互连）OTM-0.m1234116 173824Payload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)Fra me Alignment,OTU k, ODU k & OPU kOverhead第18页/共64页第十九页，共65页。shch)的主光信号）由多个波长组成，每个波长都有特定的帧格式（OTUk）同时支持光层开销（OOS）和光监

10、控通道n=波长数，m=速率等级用于自己(zj)的波分设备间互连，无法和其他厂家波分设备互通OTM-n.mOTM Overhead Signal (OOS)nOSC1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k

11、 FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me Alignment,OTU k, ODU k & O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)1234116 173824Fra me AlignmentOTU k, ODU k

12、& O PU kOverheadPayload(4 x 3808 bytes)38254080OTU k FEC(4 x 256 bytes)3第19页/共64页第二十页，共65页。第20页/共64页第二十一页，共65页。第21页/共64页第二十二页，共65页。第22页/共64页第二十三页，共65页。Unit (ODUk).第23页/共64页第二十四页，共65页。OTMUNIOTM NNIIaDI-IrVIOTM NNIIaDI-IaVIOTM NNIIaDI-IaVINetwork Operator BVendor XVendor YOTMNNIIrDINetworkOperator

13、CUSERA第24页/共64页第二十五页，共65页。382540801781415161738241234OPU k PayloadOPUk OHOPUk - Optical Channel Payload UnitODUkODUk - Optical Channel Data UnitClient Signalmapped inOPUk PayloadClient SignalOTUkFECOTUk OHOTUk - Optical Channel Transport UnitAlignmAlignmentk indicates the order:1 2.5G2 10G3 40GOTUk

14、bit rate: 255/(239-k) * STM-NODUk bit rate: 239/(239-k) * STM-N第25页/共64页第二十六页，共65页。k帧而设计(shj)n各种业务装入净荷部分n开销和业务映射有关151617 38243825 40801 7 8141234OPUk - Optical Channel Payload UnitOPUkOHOPUk Payload第26页/共64页第二十七页，共65页。TUk做电再生处理n电层交叉调度nOPUk加上一些维护(wih)管理开销组成ODUk151617 38243825 40801 7 8141234OPUkOHOPU

15、k PayloadODUk OHODUk - Optical Channel Data Unit第27页/共64页第二十八页，共65页。传输n开销(ki xio)用于外部传输ODUk OHFA OHOTUk OHOTUk FEC151617 38243825 40801 7 8141234OPUkOHOPUk PayloadFrame AlignmentOTUk - Optical Channel Transport Unit第28页/共64页第二十九页，共65页。M-N*238/(239-k) nODUk（kbit/s）STM-N*239/(239-k) nOTUk（kbit/s）STM-N

16、*255/(239-k) ODUk OHFA OHOTUk OHOTUk FEC1516 17 38243825 40801 7 8141234OPUkOHOPUk Payload16 Bytes3808 Bytes256 Bytes16/16 = 13808/16 = 238256/16 = 16238+1 = 239239+16 = 255第29页/共64页第三十页，共65页。kOPUk（kbit/s）STM-N*238/(239-k) 12 488 320.000（2 488 320*238/238）29 995 276.962（9 553 280*238/237）340 150 519

17、.322（39 813 120*238/236）ODUk（kbit/s）STM-N*239/(239-k) 2 498 775.126（2 488 320*239/238）10 037 273.924（9 553 280*239/237）40 319 218.983（39 813 120*239/236）OTUk（kbit/s）STM-N*255/(239-k) 2 666 057.143（2 488 320*255/238）10 709 225.316（9 553 280*255/237）43 018 413.559（39 813 120*255/236）注：bit rate toleran

18、ce = 20 ppm第30页/共64页第三十一页，共65页。n计算实例：n对STM-16计算净荷：8000*270*9*8*16=2488320kn对OTU1计算发送速率：n和SDH/SONET不同的是随着线路速率的提高，OTN帧的结构和长度不变，不同速率等级OTN的帧周期(zhuq)不一样，脱离了SDH基本的8K帧周期(zhuq)第31页/共64页第三十二页，共65页。AlignmOPU k PayloadOPUk OHODUkOTUk OH1234116RowColumn78FRAME ALIGNMENT OVERHEAD AREAOTUk SPECIFIC OVERHEAD AREAO

19、DUk SPECIFIC OVERHEAD AREA1415OPUk SPECIFICOVERHEADAREAPSIEXPTCMACTTCM5TCM4TCM3TCM2TCM1TCM6GCC1GCC2FTFLPMRESRESAPS/PCCSMRESGCC0FASMFAS01109127FaultIndicationFieldOperatorIdentifierOperator Specific128 129138137255FaultIndicationFieldOperatorIdentifierOperator SpecificForwardBackwardFTFLMapping&

20、ConcatSpecificMapping& ConcatSpecific25501PTTCMiSTATTTIBIP-81234567812312345678BEI/BIAEBDI12345678RESIAETCMiTTIBIP-81234567812312345678BEI/BIAEBDI12345678MFAS: MultiFrame Alignment SignalPCC: Protection Communication Control channelPM: Path MonitoringPSI: Payload Structure IdentifierRES: Reserve

21、d for future international standardisationSM: Section MonitoringTCM: Tandem Connection MonitoringACT: Activation/deactivation control channelAPS: Automatic Protection Swiching coordination channelEXP: ExperimentalFAS: Frame Alignment SignalFTFL: Fault Type & Fault Location reporting channelGCC:

22、General Communication ChannelJCJCJCNJO PJORESRESRES第32页/共64页第三十三页，共65页。第33页/共64页第三十四页，共65页。PM非OTUk信号转换到OTUk时产生OTUk转换为非OTUk时终结SMOTUk电再生时TCM在整个PM范围内的一部分起点和终点由用户决定发送口可设置运行或透传接收口可设置运行、监测或透传第34页/共64页第三十五页，共65页。n某些OTUk和ODUk开销字段可能会跨越多个OTU帧。因此定义了MFAS字节。MFAS字节的值随每帧进行增加，因而能够提供一个256帧的复帧，MFAS字节的值需要加绕码。第35页/共64页

23、第三十六页，共65页。第36页/共64页第三十七页，共65页。第37页/共64页第三十八页，共65页。第38页/共64页第三十九页，共65页。第39页/共64页第四十页，共65页。第40页/共64页第四十一页，共65页。n通道监控开销PM和汇接连接监控TCMi的结构(jigu)如下图 第41页/共64页第四十二页，共65页。第42页/共64页第四十三页，共65页。第43页/共64页第四十四页，共65页。沿ODUk 路径(ljng)监视连接的数目可在06 之间变化。监视的连接可以是嵌套的， 重叠的和/ 或层叠的。图中所示，监控的连接A1-A2/B1-B2/C1-C2 和A1-A2/B3-B4 是

24、嵌套的，而B1-B2/B3-B4 是层叠的。第44页/共64页第四十五页，共65页。图中，B1-B2和C1-C2是重叠监视(jinsh)的，也是支持的第45页/共64页第四十六页，共65页。第46页/共64页第四十七页，共65页。第47页/共64页第四十八页，共65页。第48页/共64页第四十九页，共65页。123412345678FASMFAS910111213141516PMPSISMOPUkPayloadOTUk FECbased on regulations and contractTCM1.TCMn are passed through,TCMn+1.TCM6 may be over

25、writtenClientSpecificGCC1GCC2RESTCMACTFTFLGCC0RESEXPAPS/PCCRESpassed throughterminated and re-insertedTCM6TCM5TCM4TCM3TCM2TCM1definition is under studybased on contractmay be overwritten in network第49页/共64页第五十页，共65页。第50页/共64页第五十一页，共65页。第51页/共64页第五十二页，共65页。STM-16STM-64STM-256D: Data, FS: Fixed Stuff,

26、 JC: Justification Control, N/PJO: Negative/Positive Justification OpportunitynG.709 provides two mappings for STM-N signalslbit synchronouslasynchronousnG.709 defines interworking between both mappingslcommon demapper, andlbit synchronous mapping has fixed Justification Control (JC)171838241234PJON

27、JO JCD DD3805DD DD3805DD DD3805DDD3805DJCJCPSI RES RESRES151617PJO38241905190419201921118 x 16D119 x 16D119 x 16D119 x 16D119 x 16D1234NJO JCJCJCPSI RES RESRES1516118 x 16D118 x 16D15D + 117 x 16D16FS16FS16FS16FS17PJO38241264126512801281254425612545256078 x 16D79 x 16D1234NJO JCJCJCPSI RES RESRES151

28、678 x 16D78 x 16D15D + 77 x 16D16FS16FS16FS16FS79 x 16D79 x 16D79 x 16D79 x 16D16FS16FS16FS16FS79 x 16D79 x 16D79 x 16DSTM-16STM-64STM-256D: Data, FS: Fixed Stuff, JC: Justification Control, N/PJO: Negative/Positive Justification Opportunity第52页/共64页第五十三页，共65页。173824OPUkOverheadOPUk PayloadATM cell5

29、3 bytes1234RESRES RESRESPSI RES RESRES15 16RES25501PTPSIBandwidth for ATM stream inODU1: 2 488 320 kbit/sODU2: 9 995 276 kbit/sODU3: 40 150 519 kbit/s3808*4/53=？第53页/共64页第五十四页，共65页。第54页/共64页第五十五页，共65页。T1542830-00(114739)RES25501PTPSI1234161738241815RESRESRESRESRESRESRESPSIOPUk OHRowColumnOPUk Payloa

30、d (4 x 3808 bytes)All-0s pattern第55页/共64页第五十六页，共65页。第56页/共64页第五十七页，共65页。OTU2OTU2FECClient Layer Signal(e.g. STM-16, ATM, GFP)ODU1ODU1 OHAlignmODU24xOPU1 OHClient Layer Signal(e.g. STM-16)ODU1 OHAlignmOPU1 OHClient Layer Signal(e.g. STM-16)ODU1 OHAlignmOPU1 OHClient Layer Signal(e.g. STM-16)ODU1 OHAl

31、ignmOPU1 OHClient Layer Signal(e.g. STM-16, ATM, GFP)ODU1 OHAlignmOPU1 OHODU2 OHOPU2 OHOPU2 PayloadODU2 OHAlignmOPU2 OHOTU2OHNOTE - The ODU1 floats in of the OPU2 Payload area. An ODU1 frame will cross multiple ODU2 frame boundaries.A complete ODU1 frame (15296 bytes) requires the bandwidth of (1529

32、6/3808 = ) 4.017 ODU2 frames. This is not illustrated.Client Layer Signal(e.g. STM-16)ODU1 OHAlignmOPU1 OHClient Layer Signal(e.g. STM-16)ODU1 OHAlignmOPU1 OHClient Layer Signal(e.g. STM-16)ODU1 OHAlignmOPU1 OHClient Layer Signal(e.g. STM-16, ATM, GFP)ODU1 OHAlignmOPU1 OH第57页/共64页第五十八页，共65页。11617382

33、4RowColumn1819203823382238212115000110111234OPU2 Payload(4 x 3808 bytes)OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU

34、2 TribSlot 41234OPU2 Payload(4 x 3808 bytes)OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 41234OPU2 Payload

35、(4 x 3808 bytes)OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 41234OPU2 Payload(4 x 3808 bytes)OPU2 TribSlo

36、t 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4OPU2 TribSlot 1OPU2 TribSlot 2OPU2 TribSlot 3OPU2 TribSlot 4PSIJOH TS 1PSIJOH TS 2PSIJOH TS 3PSIJOH TS 4MFASbits78第58页/共64页第五十九页，共65

37、页。17382418192038233822382122233334323121116RowColumn15000000011111123412341234PSIJOH TS 1PSIJOH TS 2PSIJOH TS 16OPU3 Payload(4 x 3808 bytes)OPU3 TribSlot 1OPU3 TribSlot 2OPU3 TribSlot 3OPU3 TribSlot 4OPU3 TribSlot 5OPU3 TribSlot 6OPU3 TribSlot 7OPU3 TribSlot 8OPU3 TribSlot 9OPU3 TribSlot 10OPU3 TribSlot 11OPU3 TribSlot 12OPU3 TribSlot 13OPU3 TribSlot 14OPU3 TribSlot 1