Length: 3 Days
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Advanced Optical Transport Networks (OTN) Training


Advanced Optical Transport Networks (OTN) Training is a 3-day advanced OTN workshop.

Optical Transport Networks are composed of a set of Optical Network Elements connected by optical fiber links to provide functionality of transport, multiplexing, routing, management, supervision, and survivability of optical channels carrying client signals.

Optical transport networks consist of the networking capabilities and the technology required to support them.

In accordance with [ITU-T G.709/Y.1331] ,[ITU-T G.805] and [ITU-T G.800], the OTN is decomposed into independent transport layer networks where each layer network can be separately partitioned in a way which reflects the internal structure of that layer network.

G.872, the Architecture of optical transport networks) defines the building blocks of an OTN as  Digital layer, OCh-layer and Media). The digital OTN layered structure is comprised of digital path layer networks (ODU) and digital section layer networks (OTU).

The OTN is provisions the transport for any digital signal independent of client-specific aspects, i.e. client independence.

Course Objectives

Upon completion of optical transport networks (OTN) training, the attendees are able to:

  • Describe SONET/SDH/DWDM transmission technologies
  • Learn the basics concepts of an OTN
  • Identify the features, functionalities, architecture and building blocks of OTN Systems
  • Identify the new requirements for IP over DWDM architecture
  • Learn about Optical Transport Networking (OTN) with G.709 Interfaces
  • Discuss advanced OTN topics including performance and security
  • Compare and contrast advanced networking transport network technologies including IP/MPLS over DWDM, GMPLS, MPLS-TP, Seamless MPLS, OTN and other

Optical Transport Networking (OTN) Course Modules

1) Introduction to Basic Optical Networking

  • A Brief History of Optical Networking and DWDM
  • Services, Transport, Framing and Optical
  • Aggregation and Transport Technologies
  • Current Trends in Transport Networks
  • Convergence of Packet and TDM Transport
  • Overview of DWDM architecture and building blocks
  • Optical Transmission Principles
  • Network Classification
  • Virtual Topology
  • Optical Layer and Higher Layer Interface
  • Efficient Routing Algorithms
  • Wavelength Conversion related Algorithms
  • Traditional IP network
  • Ability to deliver data transport services, as well as IP routing services,
  • MPLS Virtual Private Networks (VPN)
  • The key differences between MPLS-TP and IP/MPLS

2) Optical Transport Networks & Technologies

  • What is Optical transport network (OTN)?
  • Overview of ITU-T G.709/Y.1331
  • Optical Transport Network (OTN) basics
  • Optical transport network interface structure
  • Information structure for OTN interfaces
  • Multiplexing/mapping principles and bit rates
  • Mapping
  • Bit rates and capacity
  • Basic signal structure
  • Information structure for OTN interfaces
  • Multiplexing/mapping principles and bit rates
  • Wavelength division multiplex
  • Bit rates and capacity
  • Interconnection of Ethernet UNI and FlexE Group UNI
  • OTN networking
  • OTN management

3) Transport Architecture Alternatives

  • Metro
  • Core
  • Mobile backhauls
  • Switch Node
  • L3-services
  • L2-services
  • OTN, OC-x and Eth
  • λ-service: Layer 0/1
  • Packet, OTN and DWDM
  • Transport architecture evolution
  • TDM/IP/Ethernet architecture
  • WSON (Wavelength switched optical network)
  • ASON (Automatically Switched optical network)
  • ASMN (Automatically switched MPLS-TP network)

4) Basic Capabilities in OTN Networks

  • Optical Transport Network (OTN) Architecture
  • Multi-Service Clients
  • The OTN Approach
  • IP, OTN and DWDM
  • Network View
  • Electrical: Client Mapping
  • Connection Multiplexing
  • Grooming, Monitoring
  • OTN management
  • Interface for the optical transport network (OTN)
  • OTN Protection/Restoration
  • Optical Layer
  • Add/Drop, Express, Protection/Restoration
  • Basic signal structure
  • OTN interface structure
  • Point-to-point interface, type I
  • Point-to-point interface, type II
  • Optical networking interface, type II
  • Optical networking interface, type I

5) Multiplexing/mapping Principles and Bit Rates

  • Optical transport module
  • What is an Optical channel (OCh)?
  • OCh and OTSiA
  • OCh
  • Optical tributary signal assembly (OTSiA)
  • Optical transport unit (OTU)
  • OTUk (k=1,2,3,4,4-SC) frame structure
  • OTUCn frame structure
  • OTU25 and OTU50 frame structure Optical channel transport unit
  • Optical channel data unit
  • Optical channel payload unit
  • OTM overhead signal (OOS)
  • Maintenance signals
  • Mapping of client signals
  • Concatenation

6) Convergence of Optical Transport Network (OTN) Layers

  • OTN Application
  • OTN
  • Switching
  • OTN Multiplexing
  • OTN DWDM Transport
  • OTN DWDM Side
  • OTN Bandwidth Management
  • OTN Client Interfaces
  • Control and OAM&P
  • ASON
  • WSON

7) Mapping of Client Signals

  • Optical data unit (ODU)
  • Optical payload unit (OPU)
  • Overhead description
  • Types of overhead
  • Maintenance signals
  • Mapping of client
  • Mapping of GFP frames into OPUk (k=0,1,2,3,4,flex)
  • Mapping of test signal into OPU
  • Mapping of a non-specific client bit stream into OPUk
  • Mapping of other constant bit-rate signals with justification into OPUk
  • Mapping a 1000BASE-X and FC-1200 signal via timing transparent transcoding into OPUk
  • Mapping a supra-2488 Gbit/s CBR signal into OPUflex using BMP
  • Mapping ODUk signals into the ODTUCn signal

8) Optical Transport Network (OTN) Layers (End-to-End View)

  • OTS
  • OMS
  • OCh
  • OTU
  • ODU
  • client Signal Mapping (G.709)
  • ODU Multiplexing Hierarchy
  • Tandem Connection Monitoring (TCM)
  • Segment Protection/Restoration
  • Control Plane in Optical Networks
  • New Developments
  • Auto discovery of topology
  • Route computation
  • Point-and-click provisioning
  • Service restoration
  • ODUflex
  • Tributary Slot Allocation

9) Evaluation of Architecture for Optical Transport Networks

  • Network requirements and architectural framework of the Optical Transport Network Framing & Interfaces
  • Framing structure (digital wrapper), overhead bytes
  • multiplexing, and payload mappings for all payload types
  • Optical transport network physical layer interfaces

Workshop 1

Analysis of Optical Transport Network (OTN)

  • OTN Signal
  • Maintenance signals
  • OTS maintenance signals
  • OMS maintenance signals
  • OCh maintenance signals
  • OTUk maintenance signals
  • ODUk maintenance signals
  • Client maintenance signals
  • ODUk Rates
  • Optical transport module (OTM-nm, OTM-nrm, OTM-m, OTM-mvn)
  • Optical channel data unit (ODUk)
  • Overhead Description



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