OTN & N A S TA R A N N IKOUIENEJAD
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1 OTN STUDY GROUP 15 ATEFEH KHATIRI & N A S TA R A N N IKOUIENEJAD
2 OTN Hierarchy
3 OTN Frame
4 OTN Frame Alignm ODUk OTUk OH OPUk OH Client Signal OPU mapped k Payload in OPUk Payload OTUk FEC 4 Client Signal OPUk - Optical Channel Payload Unit ODUk - Optical Channel Data Unit OTUk - Optical Channel Transport Unit Alignment k indicates the order: 1 2.5G 2 10G 3 40G
5 Multiplex - Structure
6 OPU Overhead Mapping and provides information on the type of signal transported Payload Structure Identifier PSI[0]=PT Justification Control Negative Justification Opportunity Positive Justification Opportunity Required for asynchronous mapping RES RES RES JC JC JC PSI NJO PJO
7 ODUk Overhead Path monitoring(pm) Tandem Connection Monitoring (TCM) FTFL: Fault Type and Fault Location reporting channel GCC: General Communication channel APS/PCC : Automatic Protection Switching/Protection Communication channel RES TCM ACT TCM6 TCM5 TCM4 FTFL 3 TCM3 TCM2 TCM1 PM EXP 4 GCC1 GCC2 APS/PCC RES
8 Path monitoring(pm) TTI BIP-8 SAPI DAPI BEI BDI STAT Operator Specific ODUk-AIS ODUk-OCI ODUk-LCK
9 TCM TTIi BIP-8i SAPI DAPI BEIi/BIAEi BDIi STATi Operator Specific
10 OTU Overhead FAS OTU-OH FEC SM GCC0 RES TTI BIP-8 SAPI DAPI BEIi/BIAE BDI STAT Operator Specific
11 OTN Maintenance Interaction
12 Optical Layer Overhead BDI: Backward Defect Indication FDI-O: Forward Defect Indication - Overhead FDI-P: Forward Defect Indication - Payload OCI: Open Connection Indication PMI: Payload Missing Indication TTI: Trail Trace Identifier
13 ODU & OCH Switching ODU switching Electronic domain ODU switching 1:N N:1 WDM switching Photonic domain WDM switching 1:N Line amplifier Line amplifier N:1 Optical Transport Section (OTS) Optical Multiplex Section (OMS) - multi-wavelengths Optical Channel (OCh) - wavelength Optical Channel Data Unit (ODU) - sub-wavelength OCh provides end-to-end bandwidth management for a wavelength signal in the photonic domain ODU provides end-to-end bandwidth management for a sub-wavelength signal in the electronic domain is a fixed-sized container with in-band OAM tools for quality supervision and SLA assurance functions as primary bearer for client traffic Lower Order (LO-ODU) transparently carries 1.25G, 2.5G, 10G, 40G, 100G client signal rates Higher Order (HO-ODU) transparently carries multiple (multiplexed) LO-ODUs
14 Photonic Switching Line 1 Line 2 Colored & Directional ports (traditional) Wavelengths to/from a specific direction can be re-routed to any other direction The Mux/Demux functionality is distributed among the different directions Wavelengths to/from a specific direction can only be add/drop by the specific Mux/Demux Line 3 Degree-4 Wavelength routing Line 4 Line 1 Line 2 Colorless & Directionless ports Wavelengths to/from a specific direction can be re-routed to any other direction The Mux/Demux functionality is not associated to any specific direction Wavelengths to/from a specific direction can be add/drop by shared Mux/Demux resources Line 3 Degree-4 Wavelength routing Line 4
15 point-to-point link without OADM (degre-1) point-to-point link with OADM (degree-2) Ring configuration Meshed network (degree-n)
16 OTN Deployment
17 Worldwide OTN Application(Until June 2011)
18 با تشکر از توجه شما
19 Forward Error Correction (FEC)
20 Protection techniques Trail protection Sub network connection(snc) protection Share ring protection
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