Understanding OTN Optical Transport Network …

1 Understanding OTNO ptical Transport Network ( )March 9, 2010 Presenter: Mike Jamgochian Director of Business DevelopmentC t ib t St Tb id St d d T O ti CTO GContributor: Steve Trowbridge Standards Team, Optics CTO Lesson3 OTN 101 Network Application ALU OTN SupportOTN Hih OTN Hierarchy Mapping steps in OTN Standardization2 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyAlphabet SoupAlphabet SoupAcronyms ITU-T: International Telecommunications Union Telecommunications Section OTN: Optical Transport Network SONET: Synchronous Optical Network SDH: Synchronous Digital Hierarchy STS: Synchronous Transport Signalpp OTH: Optical Transport Hierarchy ODU: Optical channel Data Unit OPU: Optical channel Payload Unit STS: Synchronous Transport Signal STM: Synchronous Transport Module GFP: Generic Framing Procedure LAN PHY(10 GBase-R): LAN Physical py OTU: Optical channel Transport Unit Och: Optical Channel FEC: Forward Error CorrectionLAN PHY(10 GBaseR): LAN Physical interface WAN PHY(10 GBase-W): WAN Physical interace LO: Low Order HO: High Order GMP: Generic Mapping Procedure PPM: Parts Per Million CBR: Constant Bit Rate AMP: Asynchronous Mapping Procedure4 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only VCAT.

2 Virtual ConcatenationHistory LessonHistory LessonTelecom HistoryAsyncAsyncSONETSONETSONETE thernetOTNT ransport MechanismCopperAnalog RadioFiberDigital RadioFiber1980 1990 2000 1970 Analog RadioDigital RadioTransmission Medium1980 s1990 s2000 s1970 s6 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyITU-T OTN Definition Described in the ITU-T Recommendation (2003), OTN adds operations, administration, maintenance, and provisioning (OAM&P) functionality to Optical carriers, specifically in a multi-wavelength system such as dense wavelength division multiplexing (DWDM). () OTN specifies a digital wrapper, which is a method for encapsulating an existing frame of data, regardless of the native protocol, to create an Optical data unit (ODU), similar to that used in SDH/SONET.

3 OTN provides the Network management functionality of SDH and SONET but on a wavelength basis A digital wrapper however is flexible in terms and SONET, but on a wavelength basis. A digital wrapper, however, is flexible in terms of frame size and allows multiple existing frames of data to be wrapped together into a single entity that can be more efficiently managed through a lesser amount of overhead in a multi-wavelength OTN ifii i l d fi i ii f The OTN specification includes framing conventions, nonintrusive performance monitoring, error control, rate adaption, multiplexing mechanisms, ring protection, and Network restoration mechanisms operating on a wavelength basis. A key element of a digital wrapper is a Reed-Solomon forward error correction (FEC) ygpp()mechanism that improves error performance on noisy links.

4 Digital wrappers have been defined for , 10-, 40- and 100 Gbps SDH/SONET systems. SDH/SONET operation over an OTN involves additional overhead due to encapsulation in digital wrappers. The resulting line rates are defined as Optical Transport units (OTUs) 7 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyThe resulting line rates are defined as Optical Transport units (OTUs). What is OTN? OTN is an industry-standard Optical Transport protocol ITU "Architecture for the Optical Transport Network (OTN) (Oct 2001) Further refined in ITUT G 709 (Jan 2003 Amendment 3 Oct 2009) and ITUT G 798 Further refined in ITU-T (Jan 2003, Amendment 3 Oct 2009) and ITU-T (May 2002, xxxx Jun 2010)

5 OTN is intended to promote Network evolution beyond SONET/SDH Eliminates traditional TDM Transport complexity and related costs Removes the gaps/bottlenecks specific to emergent packet and wavelength Transport OTN offers tremendous CAPEX/OPEX benefits to carriers Reducing CAPEX via common Transport framework Lowers cost-per-bit via technology simplification and Transport commonalityhld llkl Integrates physical and Optical layer processing across Network Elements (NEs) Consequently reduces the number of NEs across the Network Reducing OPEX through Network simplification and integration Less equipment = less Operations Administration and Provisioning (OAM&P)8 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only Less equipment = less Operations, Administration, and Provisioning (OAM&P) Technology offers simplified fault isolation and improved trouble-shooting How Does OTN Technology Benefit Today s Carriers?

6 OTN Technology Delivers Value Across Many Domains COMMONALITY - via wavelength-based Optical transportP l d i l f SONET/SDH Etht d/ DWDM tt Payload equivalency for SONET/SDH, Ethernet, and/or DWDM Transport Common Network management platform support Permits endpoint-only management by avoiding termination at every midpointTRANSPARENCY th ti l di TRANSPARENCY across the Optical domain Integrates physical and Optical layers for seamless networking Promotes integration across disparate networks via common Transport framework EFFICIENCY for overall cost reduction and Network monetization Simplified multiplexing/demultiplexing of sub-rate traffic Reduction in signal overhead requirements relative to payload EVOLUTION to emerging technologies Provides simple transition to 40G and 100G transmission speeds Purpose-built for Packet Optical and Wavelength-based Transport Integrated.

7 Standardized Forward Error Correction (FEC) for extended Optical reach9 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyIntegrated, standardized Forward Error Correction (FEC) for extended Optical reach Ideal for comprehensiveControl-Plane Network implementationHow Does OTN Technology Expand Carrier Applications?OTN Supports Several Emerging Market Opportunities Optical Wavelength Services Optical Wavelength Services Offers customers full end-to-end transparency Protocol-independent transmission of SONET/SDH, Ethernet, IP, and/or Lambdas Simplifies end-customer Network management Simplifies end-customer Network management Ideal for Carrier s carrier applications, wholesale bandwidth services, etc.

8 Differentiated Services New Service Level Agreement (SLA) options Via OTN Control-Plane mesh New Integrated multi-domain operations Multi-Region Networking to integrate Physical, Transport , and Data layers under a common Network management model for customer control Bandwidth on Demand Services Fast provisioning via endtoend OTN 10 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only Fast provisioning via end-to-end OTN OTN 101 OTN 101 OTN Network VisionOTN can be implemented as an overlay to an existing Network or as a replacementHOODU ki i d IP/MPLS HO-ODU networking is used when the client throughput does not need further aggregation within a lambda LO-ODU networking is used when sub- multiplexing is needed (no stranded sub )LO-ODULO-ODULO-ODUSONET/SDHneeded (no stranded sub- ) ODU Termination ( OAM) guarantees a clear boundary between client and server organizations Sub- level networkingLO-ODUorganizations Intermediate Monitoring can be either Optical (proprietary WaveTracker) or electronic (standard G709 TC)

9 HO-ODUHO-ODUHO-ODUHO-ODUHO-ODUHO-ODUHO-O DU Switching can be accomplished by means of fast electronic technology and/or slower photonic technology12 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only level networkingALU OTN Support Optical Products OTN Ready Compliant with early OTN standard Only client interfaces will support OTN OTN Full Compliance Compliant with latest OTN Standard (Oct-09) Interfaces and core switching support OTNOnly client interfaces will support OTN Core switching still SONET/SDH Existing ProductsInterfaces and core switching support OTN New Products 1625 LX (DWDM) 1626 LM (DWDM) 1675 LU (Cross-connect) 1678 MCC (Cross-connect) 1830 PSS (DWDM) 1870 TSS (Cross-connect & DWDM)1678 MCC (Crossconnect)13 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyOTN Supports Variety of ProtocolsIPEthernetSONET/SDHV ideoOTN supportsrange of protocolsOTN digital wrapperPayload(Transparent)HeaderFECgppp rovides completetransparency forclients in flexiblecontainersOTN Multiplexing14 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyOptical ChannelMakeup of an Optical ChannelOptical ChannelOch PayloadFEC AreaOch OverheadCOLUMN1141516173824382540801 OTU OverheadeadFrame Align Overhead234 ROWOPU OverhOPU(Payload)

10 FECODU Overhead15 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only4 Building an OTN ContainerClient SignalOptical Payload UnitClientOPUpy(OPU) Optical Data Unit(ODU)ElectricalDomainOPUOPUOHODUOHOD UO ptical Transport Unit(OTU)OTUOHOTUO ptical Channel(Och)Oti lOchOptical Multiplex Unit(OMU) Optical Transport Module(OTM)OpticalDomain16 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use Only(OTM)OTN RatesMarketing Tr u e Signal Tr u e Payload OTUODUM arketing RateSignal (OTU)Payload (OPU) is also defined by Similar to Virtual Concatenation, but avoids differential delay problem and is managed as a single entity but avoids differential delay problem and is managed as a single entity 17 | Understanding OTN | December 10, 2009 All Rights Reserved Alcatel-Lucent 2009 Internal Use OnlyOTN Standardization Status Major revision to ITU-T Rec.