Transcript 20070717-neayem

Reconfigurable Optical
Mesh and Network
Intelligence
Nazar Neayem
Alcatel-Lucent
Internet 2 - Summer 2007 Joint Techs Workshop
Fermilab - Batavia, IL
July 15-18, 2007.
Network Architecture Evolution
 Legacy deployment are based on Ring topology or non-DWDM
 Multi layers with different traffic applications
 Mesh traffic within the ring
 Inter ring traffic is re-generated on the optical layer
 Inter ring traffic is generated on layer 2/3
Static Architecture
ROADM Rings
Full Mesh Network
ROADM Rings
Interconnect
2 Degree
4 Degree
Wavelengths
Switched
Virtual Rings
3 Degree
Limited Mesh
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Migrating from Static to ROADM to WSS Mesh
10GE
ROADM
2
Filter
1 2 3 4
A
C
A
A
OC-48
Filter
1 2 3 4
1
40
A
A
10 GE
10 GE
O
S
C
A
Filter
1 2 34
A
Filter
1 2 3 4
10G
 Eliminate traffic disruption
B
O
S
C
WDM
A
WSS
Thru
 ROADM WSS
A
 Colorless ports
WDM
WSS
Thru
BB A B C D E F G H
10G
Filter
1 2 3 4
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WDM
40
A
O
S
C
A
A
Filter
Filter
1 2 3 4 1 2 3 4
10GE
A
WSS
A B C D E F G H BB
10 GE
10 GE
Filter
1 2 3 4
C
Thru
BB A B C D E F G H
OC-48
 Support real-time optical monitoring
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40
6 5 4 3
10GE
 Accelerate service provisioning
ROADM
6 5 4 3
 Eliminate stranded bandwidth
 Additional Mesh Flexibility
2
1
thru
OC-48
O
S A
C
B
Filter
1 2 3 4
10 GE
10 GE
10GE
 From Static  ROADM
a/d
Filter
 With installed equipment reuse
B
thru
a/d
Filter
Filter
1 2 3 4 1 2 3 4
thru
 Short time ROI or pay as you grow
Filter
A A
C
Filter
1 2 3 4
 Flexibility to support required migration
WDM
WSS
Thru
BB A B C D E F G H
A
D
Adaptive and Agile Network
 Network is continuous evolving
Layer 02/3
 New Applications – VOD, IPTV, Content delivery
 New Market Segments
 Open and integrated transport interfaces
 Routers and switches are having more layer one features
 DWDM SFPs are becoming more and more sophisticated
 Enhance fault isolation to Layer 1 and L2/3 network
Layer 0/1
 New transport Rates – 40G and 100 G
 Networks have to adapt to the early technology from
early stage specifications to mature technology
Tighter L1 and L2/3 Network Management
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Planning the Mesh Network
Plan
 Upgrading Nodes
 Adding and deleting sites
 Wavelengths planning
 Wavelength blocking and reuse
 Mesh Protection
 path or span level WSS protection plans
 Circuit verification:
 Power, OSNR and dispersion
 Since the networks are continuously evolving, active planning the physical layer
and circuit growth is essential for network optimization
Manages the lifecycle of network design
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Network Intelligence –Deployment
 Manual commissioning Mesh network is not easy
Deploy
Planning Tool
Planning output file
 Active comparison between design fiber
characteristics and actual measurements
NMS
 Transient Control
DWDM
Commissioning
Report
 One amplifier output power setting or changes
will affect other directions amplifiers
 Network-wide automatic power equalization
 Manual equalization becoming extremely
difficult
 Interconnecting WSS ports will affect the thru
traffic in other part of the network
Fully Automated Commissioning Hides the Complexity and
Guarantees optimal Network Performance
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Network Intelligence – Mesh Circuit Provision
 Minimize number of steps to provision a service
 Planning Tool pre-provisioning circuit validation
 Protection and restoration schemes validation
 Unique service per service identity
 DWDM Color collision
A
B
C
D
G
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F
E
Network Management Integrated Intelligence
Distances, Attenuation
(BOL/EOL), CD, Fiber type
Network
Topology
Traffic matrix
Plan
Automatic
Design
Network
Commissioning
file
Tool
Port
Connectivity
Traffic
Connectivity
Design
BOM
NE Build-up
NE Commissioning
NE discovery
IP adresses,
proper SW load
(in the field)
Power Commissioning
Power balancing
THRU-PATH
Network Element
COMMISSIONING
(in the field)
NMS
(+Trouble shooting)
Manage
Deploy
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Transponder Wiring
Add Service
SERVICE
COMMISSIONING
Conclusion
 Optical Layer is migrating from ROADM rings to all optical mesh
powered by the Wavelength Selective Switch (WSS)
 New applications driving continual growth and different traffic
patterns, and higher bit-rates on links
 Network Convergence Combined with L3 alien DWDM interfaces
 Active and pro-active network awareness driving new techniques
for directly monitoring DWDM networks
 As network growing in size and complexity, network intelligence is
hiding the complexity
As Optical Networks Migrating into Mesh
Network Intelligence is Becoming more Essential
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Thank you
10 | Reconfigurable Mesh | July 2007
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