1. Reconfigurable Optical Mesh and Network Intelligence
Nazar Neayem Alcatel-Lucent
Internet 2 - Summer 2007 Joint Techs Workshop Fermilab - Batavia, IL
July 15-18, 2007.

2. 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
3 Degree
4 Degree
Full Mesh Network
2 Degree
Wavelengths
Switched
ROADM Rings Interconnect
Static Architecture
ROADM Rings
Virtual Rings
Limited Mesh

3. Migrating from Static to ROADM to WSS Mesh
Flexibility to support required migration
Short time ROI or pay as you grow
With installed equipment reuse
From Static  ROADM
Eliminate stranded bandwidth
Accelerate service provisioning
Eliminate traffic disruption
Support real-time optical monitoring
ROADM WSS
Additional Mesh Flexibility
Colorless ports

4. Adaptive and Agile Network
Network is continuous evolving
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
New transport Rates – 40G and 100 G
Networks have to adapt to the early technology from early stage specifications to mature technology
Layer 02/3
Layer 0/1
Tighter L1 and L2/3 Network Management

5. Planning the Mesh Network
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

6. Network Intelligence –Deployment
Manual commissioning Mesh network is not easy
Active comparison between design fiber characteristics and actual measurements
Transient Control
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
NMS
Planning Tool
Planning output file
Commissioning Report
DWDM
Fully Automated Commissioning Hides the Complexity and Guarantees optimal Network Performance

7. 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 G E F D

8. Network Management Integrated Intelligence
Distances, Attenuation (BOL/EOL), CD, Fiber type
Network
Topology
Traffic matrix
Plan
Automatic
Design
Tool
Network
Commissioning
file
Port Connectivity
Traffic Connectivity
Design
BOM
NE Build-up
IP adresses,
proper SW load
NE Commissioning
NMS
(in the field)
(in the field)
NE discovery
Transponder Wiring
Power Commissioning
(+Trouble shooting)
Add Service
Power balancing
Manage
THRU-PATH
COMMISSIONING
SERVICE
COMMISSIONING
Network Element
Deploy

9. Conclusion As Optical Networks Migrating into Mesh
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

10. Thank you
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