JDSU Colouless Directionless Containtionless

Colorless and Directionless Technology: Increasing the Agility of Optical NetworksBrandon C. Collings, Ph.D.JDSUChief Technology OfficerCommunications and Commercial Optical [email protected], Market WatchSeptember 21, 2010

© 2010 JDSU. All rights reserved. 2

The Agile Optical Network (2006)

Bandwidth increasing…Low predictability…Cost pressure

Operators need to improve network efficiency

Photonic

Transport

TDM/Packet





Photonic

Transport

TDM/Packet

2006

Agile Optical Network





Photonic

Transport

TDM/Packet

2006

Agile Optical Network


Photonic

The Self Aware Network (2010+)


Operators need to further improve overall network efficiency

TransportOTN

TDM/Packet

2010

Self Aware Network


Next-Generation Agile Photonic Networking

Colorless, Directionless and Contentionless Add/Drop is a key feature

Next-Generation Optical Network Agility For…– Dynamically Maintain Network Topology Efficiency

• Continuously re-balance network load optimize topology

• Photonic layer restoration reducing redundancy requirement on higher layers

– Increase Velocity and Simplicity of New Capacity Deployment • Pre-deploy transponders for remote and high-speed turn-up

• Simplified deployment procedures

– Support linerate scalability beyond 100Gb/s


TR

Colorless, Directionless, Contentionless (CDC) Add/Drop

Every add/drop port pair has the flexibility to:– Use any wavelength (Colorless)

– Connect to any direction or degree (Directionless)

– Utilize any wavelength channel independent of all other channels in use (Contentionless)

EAST

NORTH

WEST

CDC Mux/DemuxCDC Mux/Demux

Mesh Node


TR





EAST

NORTH

WEST

TR

TR


Mesh Node


TR





EAST

NORTH

WEST

TR


Mesh Node


TR





EAST

NORTH

WEST

TR

TR


Mesh NodeT

R


TR

TR

TR





EAST

NORTH

WEST

TR

TR

TR

TR


Mesh NodeT

R


Traffic Load Balancing (Network Defragmenting)

Network traffic deployed as demand arises (growth not planned)







Rebalance network load to relieve congestion and improve overallefficiency (green traffic rerouted as new red traffic pattern)




Rebalance network load to relieve congestion and improve overallefficiency (blue traffic rerouted as new pink traffic pattern)




Rebalance network load to relieve congestion and improve overallefficiency

New network connectivity installed as need identified




Rebalance network load to relieve congestion and improve overallefficiency

New network connectivity installed as need identified (yellow traffic more efficiently routed)


Photonic Layer Restoration

Photonic network rapidly reconfigured to restore wavelength connectivity Increase availability of photonic layer and transponders– Equipment always in use– Reduces likelihood of simplex operation– Less manual modification of network– Removes need for urgent fault repair– Less redundancy incorporated at higher levels

TxRxTxRx

TxRx

TxRx




TxRxTxRx

TxRx

TxRx




TxRxTxRx

TxRx

TxRx


TxRx Pre-Deployment and Deployment Velocity

Deploy multiple transponders in one action in growing node – Streamlines deployment operations

TxRxTxRx




TxRxTxRxTxRxTxRx




Once need materializes, wavelength and route remotely provisioned – New capacity provisioned rapidly for quick response and revenue capture

– Transponders can be used for local traffic or regeneration functionsTxRx

TxRxTxRxTxRx


WEST

Example Colorless and Directionless Node Architecture (Not Contentionless)

WSS

Power

SplitterW

SSPo

wer

Sp

litte

r

WSSPower Splitter

NORTH

EAST

WSS Power Splitter

WSS

Rx

Rx

Rx

Rx

Rx

Rx

Rx

Rx

WSS

Tx Tx Tx Tx Tx Tx Tx Tx

WSS Power Splitter

WSS

Rx

Rx

Rx

Rx

Rx

Rx

Rx

Rx

WSSTx Tx Tx Tx Tx Tx Tx Tx Add/Drop

Group 2Add/Drop Group 1

Not Contentionless

Presenter

Presentation Notes

Looking at the non-Contentionless implementation…how can we build the full CDC version?


General Next-Generation Network Requirements

Colorless, Directionless and Contentionless (CDC)

Modular and scalable to support:– Cost-effective degree growth

– Cost-effective total add/drop port growth

Support for >8 degrees

Support for >100Gb/s linerate wavelengths– Improved OSNR transport performance for acceptable reach

• Support for higher Spectral Efficiency transmission (>2 bit/Hz/s)

– Flexible channel bandwidth definition

More rapid wavelength switching and provisioning

Cost Efficiency


WSS

WSS

WSS

WSS

High Port Count WSS for Line Side Requirements

Large number of WSS ports to efficiently support:– More than 8 degrees– Direct and loss efficient connections to colorless, directionless and

contentionless add/drop modules

WSS on both mux and demux reduces node loss for better system OSNR– versus broadcast and select architecture

Support flexible channel allocation (gridless)

To colorless & directionless add/drop To colorless & directionless add/drop

WEST EAST

Presenter

Presentation Notes

You must consider the overall architecture in designing the next-generation network in order to meet all the requirements and scalability/modularity needs.


WSS

WSS

WSS

WSS

General Building Blocks for CDC Add/Drop (Power Splitting Architecture-Demux Only)

WEST EAST

Rx Rx Rx Rx Rx Rx Rx Rx

1:8 Power Splitting

8:1 Space Switching

Channel Filtering

Amplification

Power Splitter

Power Splitter

Power Splitter

Power Splitter

Power Splitter

Power Splitter

Power Splitter

Power Splitter


WSS

WSS

WSS

WSS

General Building Blocks for CDC Add/Drop (Wavelength Routing Architecture-Demux Only)

WEST EAST

Rx Rx Rx Rx Rx Rx Rx Rx

1:8 Wavelength

Routing

8:1 Space Switching

WSS WSS WSS WSS WSS WSS WSS WSS


CDC Add/Drop Port Scalability Modular and Scalable: up to 50 or 100% of node capacity– Node degree and add/drop capacity growth is unpredictable

– Cost optimize for ~25%...the majority of nodes

0

100

200

300

400

0 25 50 75 100Network Usage [%]

Num

ber o

f Add

/Dro

p Po

rts

0

100

200

300

400

0 25 50 75 100Network Usage [%]

Num

ber o

f Add

/Dro

p Po

rts

25%

50%

75%100%

1530

60

120

year 6

year 4year 2year 0

6-degree node


Summary

Next-Generation Self-Aware Photonic Networks – Increased functionality and flexibility for more efficient network

operations

– Colorless, Directionless, Contentionless is a central feature

– Scalability and pay-as-you-grow is critical

Simultaneous consideration of Line-side and CDC architectures critical– High port count WSS for line application to support degrees and

fanout to CDC modules

– CDC implementation options: • Power Splitting: conventional components, inefficient

• Wavelength Routing: complex components, efficient

Thank You!!

[email protected]

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JDSU Colouless Directionless Containtionless