Flexible transport networks
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Flexible Transport Networks. Steven D. Robinson VP, Product Management [email protected] Five Essential Elements of Next Generation Optical Networks. OPM. ADM. ADM. Mux. Mux. ROADM. O P M. Design Networks in Minutes. West. East. Up to 16 degrees.

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Flexible Transport Networks

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Flexible transport networks

Flexible Transport Networks

Steven D. RobinsonVP, Product Management

[email protected]


Five essential elements of next generation optical networks

Five Essential Elements of Next Generation Optical Networks

OPM

ADM

ADM

Mux

Mux

ROADM

O

P

M

Design Networksin Minutes

West

East

Up to 16 degrees

  • 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


What is a roadm

What is a ROADM?

Reconfigurable Optical Add/Drop Multiplexer (ROADM)

ROADMModule

ROADMModule

OPM

DROPs

ADDs

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

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


Wdm optical transport technology options

WDM Optical Transport Technology Options

2 Degree ROADMBlocker/IPLC with fixed filters

WB Module

Add Filters/Combiner

Splitter /Drop filters

O

P

M

OEO Regen(Point-to-point DWDM)

Fixed Port ROADM

OPM

Per  Optical Switch

Multi-port Mux/Demux

Multi-Degree WSSwith fixed filters

OPM

Fixeddrops

OPM

OPM

FixedAdds

Fully Flexible Multi-degree ROADM

Per Optical Switch

Multi-port Mux/Demux

O

P

M

FOADM

Drops

Multi-Degree WSS ROADMwith colorless ports

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


Why do customers like all optical

Why do customers like “All optical”

All Optical ROADM : 42 Transponders

12

21

1

1

1

1

1

1

1

1

1

ILA

18

13

14

15

16

19

17

20

14

15

13

16

12

17

19

18

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

21

21

20

12

ILA

Source

1

2

3

13

14

15

16

17

18

19

20

21

1-12

21

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


Oeo or roadm which is the better choice

OEO or ROADMWhich is the better choice?

ROADM

40 Gb/s

ROADM

OEO

10 Gb/s

Bit Rate

ROADM

OEO

2.5 Gb/s

2 4 6 8 10 12 14 16 18

Number of Pass-Thru Channels

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)


Multi degree roadm or oeo why be forced to choose

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

Multi-DegreeROADM Switch

2.5G

2.5G

10G

10G

40G

100G

Per WL OEO Switch

Multi-Degree OEO Switching

Digital ROADMNode

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


Digital roadm hybrid node lowest overall cost flexibility

Digital ROADM Hybrid NodeLowest Overall Cost & Flexibility

2.5G

2.5G

10G

10G

40G

100G

  • Maintain manageable regions of transparency

DigitalROADMNode

All OpticalROADM

Multi-DegreeAll Optical ROADM

Per WL OEO Switch

Multi-Degree Digital Switching

TR

TR

All Optical Spur

  • Topology Agnostic

  • Traffic Pattern Agnostic

  • Bit Rate Agnostic

  • Simpler Optical Engineering

  • Simpler Multi-Degree Operation

  • Lower overall cost solution


Key technologies used to provide flexible transport networks

Key Technologies used to Provide Flexible Transport Networks

True Point-and-click Planning & Provisioning

RapidAutomated NetworkPlanning

and End-to-End Management

GMPLSControl Plane

Widely TunableLasers

Fully AutomatedOptical Layer

Integrated Optical Cabling

Integrated Platforms

AGC / Transient Controlled Optical Amplifiers (OAs)

Multi-Service ADM-on-a-blade

Cross  Optical Switchw/ Integrated. Transport

Hot- Pluggable SFPs & XFPs

Flexible, Transparent Optical Interfaces

Integrated Carrier Ethernet Transport

Fully Flexible WSS ROADMs

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


Flexible networks summary

Flexible Networks Summary

2.5G

2.5G

10G

10G

40G

100G

O

P

M

MP-WSS

WSS

Flexible Drops

Flexible Adds

  • 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


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