Internet 3
Optimizing Optical Networks
with
Multi-Haul Networks
December 7th, 2006
Roy Bowcutt
Roy Bowcutt
Outline
 Traditional WDM systems and real networks
 Technology applied in real networks
 Optimizing networks with multi-haul designs
 Intelligent Integration using an intelligent control plane
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© 2006 ADVA Optical Networking. All rights reserved.
Traditional Network Segmentation
 Networking Solutions Optimized for Each Segment (Access, Metro,
Regional, and Long Haul)
 Technologies Targeted for One or Two Networking Segments
 Network Management Systems, Provisioning Operations, and
Organizational Structures built around Segmented Networks
3
© 2006 ADVA Optical Networking. All rights reserved.
WDM Network Categories
Regional
Long Haul
Metropolitan
Access
<800 km
<100 km
<8 l 2.5G
$
<400 km
20 l 10G + 2.5G
40 l 10G (2.5G)
$$$
$$
WDM systems are typically
optimized for a given application
4
>800 km
+80 l 10G
+40 l 40G
$$$$$
© 2006 ADVA Optical Networking. All rights reserved.
Increased
Network Cost
WDM Network Segmentation
Management Systems and Organizational
Structures Developed and Organized for
Networking Segments
Regional
Metro
Access
5
© 2006 ADVA Optical Networking. All rights reserved.
Long Haul
To North
Rings
Real Networks
Many Networks do not
fall in any single
category
3
2
2
4
9
5
6
5
7
8
4
6
Increased Network Cost
7
8
5
7
7
9
• New Jersey – Maryland Network
• In-service 2003
• 88 Network Elements
• Supports 40 l per fiber
5
• 10G & 2.5G
6
8
6
7
12
10
The number of channels (10G and 2.5G)
on each optical span at initial turn-up is
indicated by the number that is circled.
2
11
6
11
8
3
4
4
7
6
© 2006 ADVA Optical Networking. All rights reserved.
To South
Rings
4
4
Technology Application Segmentation
Access
Transmitters
Metro
2.5G
CWDM
DML
2.5G
Regional
EAML
2.5G
40G
MZ-EML
10G
EAML
10G
No
Amp
Amplifiers
Long Haul
Raman
Hybrid
Raman/EDFA
EDFA
Dual Stage EDFA
Capacity
8l
80l
20l
40l
Terminal
Node
Switching
ROADM
7
OADM
ROADM
Multi-Degree
ROADM
© 2006 ADVA Optical Networking. All rights reserved.
Modular WDM - Amplifiers
Pre-amp
(r)OADM
Post-amp
DCM
Rx/Tx
DCM
Amplifier options
• No amplifier
• Single-pump EDFA
• Dual-pump EDFA
• Dual-pump EDFA with mid-stage access
• Variable Gain EDFA
• Distributed Raman
• Hybrid Raman+EDFA
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© 2006 ADVA Optical Networking. All rights reserved.
Modular WDM - Transponders
Pre-amp
DCM
(r)OADM
Post-amp
Rx/Tx
DCM
Transponder options
• External ITU-T l, any rate
• CWDM 2.5G
• DML DWDM 2.5G
• EAML 2.5G
• MZI 2.5G
• EAML 2.5G FEC
• EAML 10G FEC
• MZI 10G FEC & duobinary
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© 2006 ADVA Optical Networking. All rights reserved.
Modular WDM – (r)OADM
Pre-amp
DCM
(r)OADM
Post-amp
Rx/Tx
DCM
OADM options
• None (line-amp node)
• 4 l and 8 l CWDM mux/demux
• single-l DWDM filters
• 20 l mux/demux
• 40 l mux/demux
• broadcast-and-select (2-degree) ROADM
• multi-degree ROADM
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© 2006 ADVA Optical Networking. All rights reserved.
EDFA Power Ripple
• 6 spans x 100 km SMF 9 EDFA + 4 OADM
• Low power ripple – no need for channel equalizer
Input to first post-amp
Output of last pre-amp
< 5 dB power ripple
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© 2006 ADVA Optical Networking. All rights reserved.
ROADM for Power Equalization
• Recirculating loop with
2-deg. ROADM
• <5 dB power ripple after
16 ROADM
• Open eye diagrams for
10G EAML
1541 nm 16 loops
0 loops
12
1535 nm 16 loops
16 loops
© 2006 ADVA Optical Networking. All rights reserved.
Long-Haul All-Optical Transmission
• Field trial 10 spans x 160 km SMF with no OEO regen
• EAML, NRZ 10G XPDR’s with hybrid Raman/EDFA
• No per-wavelength power equalization along the link
1.00E-02
EFEC BER threshold
28
26
1.00E-03
Error Free
with EFEC
turned ON
22
Span 1
20
Span 10
1.00E-04
BER
OSNR [dB]
24
XPDR1
XPDR2
1.00E-05
18
16
1.00E-06
14
12
1525
1.00E-07
1530
1535
1540
1545
1550
1555
1560
13
14
16
OSNR (dB)
Wavelength [nm]
13
15
© 2006 ADVA Optical Networking. All rights reserved.
17
18
19
Multi-haul WDM System
Service
providers
Support multiple
WDM platforms
High Op.Ex.
Use modular WDM system adapting
to all networks requirements
• Protocols
• Data rates
• Number of channels
• Span distances
• Total distances
• Fiber types
• Add/drop capacity and reconfigurability
• Protection options
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© 2006 ADVA Optical Networking. All rights reserved.
Multi-haul WDM Network
2.5G DML
10G MZI
R
2.5G
EAML
>1000 km
10G EAML
R
R
40G
CWDM
Multi-deg. ROADM
1-stage EDFA
R
2-stage EDFA
R
2-deg. ROADM
OADM
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© 2006 ADVA Optical Networking. All rights reserved.
Raman
Hybrid Raman/EDFA
Network Cost Comparison
120%
l
Relative Cost
100%
l
80%
60%
40%
20%
0%
16
Fixed
OADM
2-degree
ROADM
Multi-deg.
ROADM
© 2006 ADVA Optical Networking. All rights reserved.
Mixed
(r)OADM
Tying Network Tools Together
2.5G DML
10G MZI
R
2.5G
EAML
>1000 km
10G EAML
R
R
40G
•
•
•
•
•
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CWDM
Provisioning Simplification
Network utilization
Multiple provisioning systems
Automatic network inventory (discovery)
Embedded service awareness
© 2006 ADVA Optical Networking. All rights reserved.
Intelligent Control Plane
Reduces Operational
Expenditures
and
Metro Core
Increases Service Delivery
Metro Access
Metro Edge
Customers
Expedited Provisioning
Point and click provisioning
Network agility
Enhanced revenue capability
Integrated management
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Network Efficiency
Network Evolution
Higher asset utilization
Automated network
inventory and reuse
Efficient restoration
Interoperability
New types of services
New architectural and
operations models
© 2006 ADVA Optical Networking. All rights reserved.
Summary – Multi-haul DWDM
 Mix different XPDRs, Amplifiers, OADMs, etc on the
same optical path
 Use the lowest-cost (but still reliable) alternative to
meet network requirements
 Cost and performance optimization performed with
automated control plane technology
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© 2006 ADVA Optical Networking. All rights reserved.
Thank You!
rbowcutt@advaoptical.com
info@advaoptical.com
About the Author
Roy Bowcutt is Senior Director of Product Management at ADVA Optical Networking. of Product
Management at Movaz Networks. Roy is experienced in the engineering and market development
of telecommunications, cable video transmission, and data networking industries. Prior to ADVA,
Roy was the Vice President of Product Management at Movaz Networks. Prior to joining Movaz, he
worked in various engineering and management positions at Scientific Atlanta and IBM. Roy
holds a BS in Electrical and Computer Engineering from Brigham Young University, a Masters in
Electrical Engineering from the University of Minnesota, and an MBA from Emory University.
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© 2006 ADVA Optical Networking. All rights reserved.