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Implications of Super-Channels
on CDC ROADM Architectures
Anuj Malik, Wayne Wauford, Zhong Pan, Nitin K Goel,
Steve Hand, ...
500 GHz
10 λ @ 50GHz
375 GHz
10 λ Super-Channel
DWDM super-channel
• Unified channel of multiple optical carriers
• Provis...
ROADM Capabilities
Basic ROADM CDC-ROADM
Reconfigurable express &
add/drop (replace
FOADM)
Specific l mux port
1 x mux ...
Super-Channel CDC ROADM Architecture
Super-channel Routing Module
with Flexible Grid Twin WSS
Line Out
Line In
System 16 I...
Super-Channel CDC ROADM Simplify Networks
 Super-channels are higher capacity than single λ
• e.g., 400G, 500G, 800G, 1Tb...
Super-channel CDC ROADMs NetworkStudy
North American Long-haulNetwork Model
Traffic Types
• City-to-city
• Data Center-to-...
Super-channel CDC ROADMs NetworkStudy
500G Super-channelsvs. 100G Wavelengths
Assumptions:
• CDC ROADM (up to 8 degrees)
•...
Conclusion
• Emerging technology
• Network scale
• Ease of operation
Super-channels
• Colorless, Directionless, Contention...
Thank You
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Implications of super channels on CDC ROADM architectures

OFC 2014 Presentation

This study proposes CDC ROADM architecture compatible with emerging DWDM super-channel technology. A real world network model is used to quantify that this architecture requires fewer network components leading to less capital and operational costs.

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Implications of super channels on CDC ROADM architectures

  1. 1. Implications of Super-Channels on CDC ROADM Architectures Anuj Malik, Wayne Wauford, Zhong Pan, Nitin K Goel, Steve Hand, Matthew Mitchell Infinera Corporation, Sunnyvale, CA, USA OFC 2014
  2. 2. 500 GHz 10 λ @ 50GHz 375 GHz 10 λ Super-Channel DWDM super-channel • Unified channel of multiple optical carriers • Provisioned in a single operational cycle Emergence of Super-Channels Advantages of Super-Channels • Very high speed (up to 1 Tb/s) • Eliminate guard bands between channels • Increased fiber capacity • Lower operational complexity Many recent experiments, field trials, and deployments • 400G/500G/800G/1Tb/s • Over 1Pb/s of deployed 500G super-channels 0 20 40 60 80 100 120 140 160 180 200 2 3 4 5 6 7 8 Terabitspersecond ROADM Degrees Capacity of ROADM Node: Super-Channels vs 100G Wavelengths Super-channels increase ROADM scale
  3. 3. ROADM Capabilities Basic ROADM CDC-ROADM Reconfigurable express & add/drop (replace FOADM) Specific l mux port 1 x mux per direction Colorless: any channel to any mux port Directionless: share mux between directions Contentionless: multiples of same l can be add/drop to same mux Colorless-ROADM Enhances Basic-ROADM Enables any channel connected to any mux port 1 x mux per direction CDC ROADM Provide Truly Flexible Optical Transport Infrastructure
  4. 4. Super-Channel CDC ROADM Architecture Super-channel Routing Module with Flexible Grid Twin WSS Line Out Line In System 16 IN System 9 IN System 9 OUT System 16 OUT System 1-8 IN System 1-8 OUT 1X16 WSS 1X16 WSS Super-channel Switch Modules, Multicast Switch (MCS) based 8 Line In/Out ports 16 Add/Drop In/Out ports Dual 8x16 Multicast Switch • Flexible Grid: support super-channels > 50GHz • Colorless: any super-channel to any mux port • Directionless: share mux between directions • Contentionless: multiples of same l can be add/drop to same mux Super Channel FSP-AD Amp Express channels Add/Drop channels North West East Amp Super Channel Super Channel Super Channel Super Channel Super Channel Super-channel Switch Modules Amp MCS MCS MCS FSP-E WSS WSS FSP: Fiber Shuffle Panel for MPO fibers Super-channel Routing Module Route and Select Architecture
  5. 5. Super-Channel CDC ROADM Simplify Networks  Super-channels are higher capacity than single λ • e.g., 400G, 500G, 800G, 1Tb/s  Significantly less Routing and Switching Module ports • Compared to wavelength-based  Example: 1 Tb/s • Two 500Gb/s super-channels • Ten 100Gb/s wavelengths • 2 vs. 10 add/drop ports Node-level Comparison 4 degree CDC ROADM with Full Add/Drop 100G Waves 500G Super- channels # of Switch Modules 24 5 # of Routing Modules 8 4 Total 32 9 CDC ROADM diagrams based on S. Gringeri et al., “Flexible Architectures for Optical Transport Nodes and Networks,” IEEE Communication Magazine, Vol. 48, no.7, July 2010, p.40
  6. 6. Super-channel CDC ROADMs NetworkStudy North American Long-haulNetwork Model Traffic Types • City-to-city • Data Center-to-Data Center • International traffic from submarine cables 40% annual growth # of Nodes 87 # of Spans 434 Average Node Degree 2.6 Max Node Degree 5 Total Fiber Distance 32,130km
  7. 7. Super-channel CDC ROADMs NetworkStudy 500G Super-channelsvs. 100G Wavelengths Assumptions: • CDC ROADM (up to 8 degrees) • 1x16 WSS for Routing Module • 8x16 MCS for Switch Module • Integrated OTN switching • 100G line module • 500G super-channel line module # of Super-channel vs 100G line modules per year 0% 200% 400% 600% 800% 1000% 1200% Year 1 Year 3 Year 5 #ofLineModules (usingYr1S-CLMsasthebase) Super-Channel Line Modules 100G Line Modules # of Super-channel vs 100G ROADM elements* per year 0% 50% 100% 150% 200% 250% 300% 350% 400% Year 1 Year 3 Year 5 #ofROADMElements (usingYr1S-CROADMasthe base) Super-Channel ROADM Wavelength-based ROADM *ROADM elements = Routing and Switch Modules
  8. 8. Conclusion • Emerging technology • Network scale • Ease of operation Super-channels • Colorless, Directionless, Contentionless • Most flexible and efficient optical transport CDC ROADMs Super-channel CDC ROADM • Flexible Grid • Significantly fewer ROADM elements • Less operational complexity Super-channel CDC ROADMs simplify networks
  9. 9. Thank You

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