Flexible Transport Networks

Steven D. RobinsonVP, Product Management

srobinson@meriton.com

Confidential

2

Fully Flexible Reconfigurability Simple, Agile, Self Maintaining Systems

Pay as You Grow Scalability Start with 1 , grow by 1

Seamless upgrade to 100G (efficiently)

Efficient Aggreg. & Switching Integrated “ADM-on-a-blade”, BW efficient

TRs Sub switching, Carrier Ethernet Transport

Multi-Degree Operation Both Optical & Electrical Multi-degree Options

Automated Network Planning One time Node Engineering, GMPLS Control

and Management Systems Plane & True “Point-and-Click” Provisioning

Five Essential Elements of Next Generation Optical Networks

ROADM

OPM

OPM

Mux Mux

ADM ADM

West EastDesign Networks

in Minutes

Up to 16 degrees

Confidential

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What is a ROADM?What is a ROADM?

DROPsADDs

ROADMModule

OPM

ROADMModule

Key attributes of ROADM Module

Fully Flexible, Remotely Reconfigurable Optical Add Drop

Automatic power equalization on inputs, outputs, adds, drops

Optical Power Monitoring (OPM) of all channels

Reconfigurable Optical Add/Drop Multiplexer (ROADM)

Key benefits of ROADM Module

Elimination of the OEO “Pass-through” tax Wavelength Reuse Scaleable Bandwidth (Start with 1 , grow by 1 )

Single Wavelength Granularity – No stranded bandwidth

Fully Automated Optical Layer

Confidential

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WDM Optical Transport Technology Options

Fixed Port ROADM

FOADM

Multi-Degree WSS with fixed filters

Fixeddrops

OPM

Per Optica

l Switch

Multi-port Mux/Demux

OPM

FixedAdds

2 Degree ROADMBlocker/IPLC

with fixed filtersOPM

Splitter /Drop filters

Add Filters/Combiner

OPM

WB Module

OEO Regen(Point-to-point DWDM)

Tunable Filter

* Manages all wavelengths * Lower system cost* No OEO Pass-thru tax* Fully Flexible Ports enable: Any to any port Supports Tunable lasers

Dynamic Management Jumper-less provisioning* Multiple wavelengths/drop port Mesh node capability Ring interconnection

* Manages all wavelengths * Lower system cost* No OEO Pass-thru tax* Fully Flexible Ports enable: Any to any port Supports Tunable lasers

Dynamic Management Jumper-less provisioning* Multiple wavelengths/drop port Mesh node capability Ring interconnection

Multi-Degree WSS ROADMwith colorless ports

Fully Flexible Multi-degree ROADM

Per Optical Switch

Multi-port Mux/Demux

OPM

Drops

OPM

Confidential

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Why do customers like “All optical”

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Source321

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0

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All Optical All OEO

21 21 20 20 19 19 18 18 17 17 16 16 15 15 14 14 13 13 12 12

All OEO or “Digital Transport”: At least 380 Transponders

ILA

All Optical ROADM : 42 Transponders

21 121 1 1 1 1 1 1 1 1

ILA

In many cases, “All optical” can dramatically reduce the number of

unnecessary Transponders

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OEO or ROADMWhich is the better choice?

Decision depends on: Bit Rate; Number of Wavelengths Topology & Traffic Patterns Switching Need (which determines # of pass-thrus vs # of drops)

Size (# nodes and span length) Amplify? Regen? Total Cost of Ownership (OPEX vs. CAPEX)

ROADMROADM

2 4 6 8 10 12 14 16 182 4 6 8 10 12 14 16 18

40 Gb/s40 Gb/s

Number of Pass-Thru ChannelsNumber of Pass-Thru Channels

Bit

Rat

eB

it R

ate

10 Gb/s10 Gb/s

2.5 Gb/s2.5 Gb/s

OEO

OEO ROADMROADM

ROADMROADM

Confidential

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2.5G

2.5G Per WL OEO Switch

10G

10G

40G

100G

Multi-Degree OEO Switching

Multi-degree ROADM or OEO?Why be forced to choose?

All Optical ROADM Advantages: Fully Bit Rate Transparent

1G 10G 100G Per wavelength Scaleable

1 2 . . . 40 Lower Power Fully Automated Optical Layer Low Pass-thru costs

OEO Advantages: Sub-Wavelength Switching Potentially Lower Terminal Costs

(at full capacity) Simpler Optical Engineering Simpler Multi-Degree Operation

Multi-DegreeROADM Switch

Digital ROADMNode

Confidential

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Maintain manageable regions of transparency

Digital ROADM Hybrid NodeLowest Overall Cost & Flexibility

DigitalROADM

Node

0

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, $

All Optical DigitalROADMHybrid

All OEO

Topology Agnostic Traffic Pattern Agnostic Bit Rate Agnostic Simpler Optical Engineering Simpler Multi-Degree Operation Lower overall cost solution

Per WL OEO

Switch

Multi-DegreeAll Optical ROADM

Multi-Degree Digital

Switching

2.5G2.5G10G10G

40G100G

All Optical Spur

All OpticalROADM

TRTR

Confidential

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Key Technologies used to Provide Flexible Transport Networks

Fully Flexible WSS ROADMs

ROADM Systems provide much more than just Wavelength Reconfigurability They provide a total “Agile Optical Network” Solution

Integrated Platforms

RapidAutomated Network

Planning

Cross Optical Switchw/ Integrated. Transport

GMPLSControl Plane

and End-to-End Management

Widely TunableLasersFully Automated

Optical Layer

Hot- Pluggable SFPs & XFPs

Multi-Service ADM-on-a-

blade

Integrated Carrier Ethernet Transport

True Point-and-click Planning & Provisioning

AGC / Transient Controlled Optical Amplifiers (OAs)

Integrated Optical Cabling

Flexible, Transparent Optical Interfaces

Confidential

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Flexible Networks Summary

Customers have recognized that low OPEX is now just as important as the lowest CAPEX

ROADM Modules are just one part of realizing the Next Generation Agile Optical Network

Other technologies such as automated planning tools, widely tunable lasers, optical backplanes, Pluggables, and GMPLScan dramatically simplify planning, operation & management

Selection of the right kind of ROADM is crucial to realizing these savings (Colorless Port, modular, WSS based ROADMs are the best choice)

These systems must be designed from the ground up to realize their full potential (Bolt-on ROADMs don’t work)

Digital ROADM Hybrid Solution may offer the best flexibility and lowest overall cost

MP-WSS OPM

Flexible Drops Flexible

Adds

WSS

2.5G2.5G10G10G

40G100G