Simplicity and Automation in
Reconfigurable Optical Networks
Dr. Tom McDermott
Director, CTO Office, Fujitsu
[email protected]
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Why Reconfigurable Optical Networks for
Research and Education?
 Distance


10G circuits across regional distances
100Gb/s to Tb/s of capacity
 Protocol


and capacity
transparency
Research
Laboratory
University
University
Ethernet, SONET, Fiber Channel Protocols
Lowest latency possible
 Automation

Research
Laboratory
Antenna Site
Radio Astronomy
High Speed Grid Computing
Uncompressed HD Video
Rapid circuit establishment and re-arrangement
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Optical Networking Evolution
Simplicity
•Arbitrary topologies
•Dynamic wavelength assignment
•Automatic power balancing
•Universal amplifiers
•Tunable components
•xWDM access integration
•Sub-wavelength integration
•Simpler than SONET Operations
•Single Ring Topologies
•Reconfigurable wavelength assignment
•Automatic power balancing
•Operational ease equivalent to SONET ADMs
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM
WDM
0-1000km
10G - 1.6T
0-600km
10G-400G
0-300km
2.5G - 160G
WDM
WDM
•Point to Point topologies
•Static wavelength assignment
•Manual power adjustments
•Heavy operational burden
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Flexibility/
Distance
Capacity
Optical Hubbing: Dynamic Networking
Across any Topology
Two-degree nodes
Mixed two degree and multi-degree nodes
ROADM
2 pairs
1 pair
ROADM
ROADM
ROADM
ROADM
ROADM
ROADM





Multiple, small rings
Additional Fiber pairs required
Costly OEO between rings
Manual Fibering Between Rings
Non-integrated spurs





Single growable structure
Only 1 fiber pair between any two
sites
No OEO between rings
Automated connectivity between
rings
Integrated spurs
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Optical Hubbing – Dynamic Assignment vs.
Manual Patching
Back to Back
•Fibering depends directly on
wavelength assignment
•100’s of jumpers for a large
system
DWDM
Optical Hubbing Reduces Fibering
350
300
Number of 250
Fibers to 200
Interconnect 150
Rings
100
Optical Hub
Back to Back
50
DWDM
DWDM
0
2
3
4
Number of Rings per Hub Site
DWDM


Optical Hubbing

•Fibering done day one.

•Wavelengths assigned
dynamically

•10’s of jumpers for a large

system
Eliminates transponders
Eliminates NE’s
Single TID
10x reduction in fibering
Automatic reconfiguration
Fibering is independent of

Wavelength routing
 Wavelength assignment
 Wavelength quantity
ROADM

Allows multiple network
deployment scenarios
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Technology Breakthrough – Wavelength
Selective Switch (WSS)





Single, integrated device
Replaces optical demultiplexer, multiplexer and optical switches
Removes unnecessary loss on thru path -> more nodes, more reach,
more savings
Any wavelength or any group of wavelengths to any/multiple ports
Enables optical hubbing and arbitrary network topologies
DEMUX
Switch
MUX
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Optical Fabric Technology Evolution
iPLC
Waveblocker
West
WaveBlocker
East
West
Client ports
2-degree solution
Wavelength Selective Switch
Integrated PLC
East
West
North
Client
lN
1xN WSS
East
South
2-degree solution
Multi-degree solution

2 port DWDM device
 Blocks individual
wavelengths on
through path
 Other components
perform wavelength
add/drop
 Used in Broadcast and
Select Architectures




2 port DWDM + N
wavelength port device
Switches individual
wavelengths to single
client ports
Low through loss – large
networks, many nodes
Complex cascading
required for multi-degree
solutions

N port DWDM device
 Switches individual
Wavelengths between
DWDM ports
 Colorless operation
 Low through loss – large
networks, many nodes
 Can be mixed with 2degree fabrics on a
network basis
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Remote Touchless Service Activation –
Revolutionizes Service Velocity
3
1
4
6
1
2
ROADM
10
ROADM
7
9
ROADM
2
11
ROADM
5
ROADM
8
Site visits only for
service card installation.

First-generation DWDM

Multiple site visits
 Manual patching for through circuits
 Manual power balancing
 Limited service velocity
“In one small region, we would have to do 30,000
individual fiber jobs without using ROADMs,” “…
transition to Ethernet becomes easier with a
ROADM infrastructure because we can react
quickly.” G. Keith Cambron, SVP of AT&T labs at
OFC 2006.

Touchless provisioning

Site visits at service edge only
 Automated SONET & wavelength
provisioning
 Operational simplicity
 Quantum leap in service velocity
Fujitsu-pioneered technology
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Automatic Power Balancing
 Maintains
equal channel output power in face of wavelength
assignment/rearrangement/network failure
 Enables software provisionable wavelength add/drop/thru and
reconfigure
 No manual adjustments anywhere
0.16
Fujitsu
patented
technology
1ch
40ch
0.14
relative power (r.u.)
0.12
Conventional AGC
technology
0.1
All wavelength power levels equal
0.08
Fujitsu
New
technology
Technology
0.06
0.04
0.02
0
-2
0
2
4
time(ms)
6
8
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Automating Control and Management
 GMPLS



Populates EMS database for assured inventory tracking
Verifies fiber connectivity
Craft user sees whole network easily
 Circuit




provisioning options
Point and click from EMS
Activated from EMS with explicit route – signaled using GMPLS
Activated from EMS, computed route using GMPLS
 Circuit

enabled topology discovery
tracking with GMPLS
Network element layer understands end to end circuit view
Simplifies troubleshooting and alarm correlation
ROADM
ROADM
ROADM
ROADM
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Summary
 Optical
Networking provides substantial value for R&E
applications

Transparency, distance, capacity, automation
 Optical
networking surpasses the simplicity of SONET
networking





Elimination of manual adjustments
Zero-lambda turnup
In-service wavelength additions to spans, rings
In-service addition of nodes to rings
In-service addition of rings and spurs to networks
 Network




automation uniquely enabled by
Optical Hubbing
Auto-adjusting amplifiers
Tunable components
GMPLS control plane and EMS
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications
Fujitsu Proprietary and Confidential All Rights Reserved, ©2006 Fujitsu Network Communications