evaluating efficiency of multi layer switching in future optical transport networks
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1 | Infinera Confidential & Proprietary
Evaluating Efficiency of Multi-Layer Switching in Future Optical Transport Networks
Anuj Malik, Soumya Roy, Abhijeet Deore, Onur Turkcu, Satyajeet Ahuja, Steven J. Hand and Serge Melle
OFC 2013
2 | Infinera Confidential & Proprietary
Carriers Need More Capacity
Drivers
Video
Mobility
Cloud
3 | Infinera Confidential & Proprietary
Core Network
Traffic Demands and Patterns
Customer
Data Center
High Proportion of <100G demands (1/2.5/10G)
Mesh Traffic Patterns
More and More Express Traffic
Digital Switching
Optical Switching
4 | Infinera Confidential & Proprietary
Multi Layer Switching
Combines Best In Class Optical and Digital BW management
ROADM Optical BW Management
Photonic Integration for pervasive digital grooming/switching
Unconstrained sub-l digital switching
ODU0/ODUflex switching granularity
Reconfigurable optical switching
Dynamic add/drop/express for optical channels
Reconfigurable optical switching for OpEx Savings
Dynamic add/drop/express for optical channels
Unconstrained sub-l digital switching
ODU0/ODUflex switching granularity
Wavelength level Protection
Digital BW Management
ROADM Optical BW Management
Digital BW Management
Optical BW Management for Super-Channels
Photonic Integration for pervasive digital grooming/switching
Unconstrained sub-l digital switching
Reconfigurable optical switching for OpEx Savings
Dynamic add/drop/express for optical channels
Wavelength Level Protection
5 | Infinera Confidential & Proprietary
Architecture Comparisons
Digital Switching Architecture
Optical Switching Architecture
Multi-Layer Switching Architecture
6 | Infinera Confidential & Proprietary
26,629 km fiber network
60 total add/drop nodes • 17 Tier 1
• Includes 8 data center nodes
• Includes 2 dual POP sites (London, Paris)
• 26 Tier 2 cities
• 17 Tier 3 cities
• 238 optical line amplifier sites
Representative of typical long-haul collector network • “Carrier’s carrier” service provider
• Tier 1/PTT national long-distance international network
Pan-European Long-Haul Network
Fiber Type Fiber Distance (km)
Number of Spans
E-LEAF 17689 215
Silica Core 486 3
SMF28 7826 93
TWRS 627 8
Total 26629 319
7 | Infinera Confidential & Proprietary
3-tier service demand model • Gravity model for A-Z demands
between all city-city pairs
• Overlay data traffic from data centers
• Overlay international traffic from trans-oceanic cables
Service demands across range of interface rates: 1G, 2.5G, 10G, 40G and 100G
Average 57% growth per period over 5 periods
Final traffic volume of 55Tb/s • 4Tb/s average capacity per WDM link
Pan-European Long-Haul Collector Network Service Demand Assumptions
Network Traffic Volume (Tb/s)
Tota
l Tra
ffic
Vo
lum
e (
Tb/s
)
0
10
20
30
40
50
60
Period 1 Period 2 Period 3 Period 4 Period 5
9 Tb/s 26 Tb/s 55 Tb/s
100G
40G
10G
2.5G
1G
Service I/F
17 Tb/s 39 Tb/s
8 | Infinera Confidential & Proprietary
Benefits of Multi Layer Switching
CAPEX Reduction: 13-22% less number of 100G ports
Digital Switching More efficient with less filled
demands
Optical Switching More efficient with fully filled
demands
Multi Layer Switching Combines benefits of both
digital and optical switching
9 | Infinera Confidential & Proprietary
Beyond 100G - Super-channels
LINE MODULE
Delivers excellent optical performance
Must be provisioned in a single operational cycle
Operational Scale
Fiber Capacity
Next Gen Services
Super-channels are an evolution in DWDM in which several optical carriers are combined to create a
composite signal of the desired capacity
10 | Infinera Confidential & Proprietary
Super-Channel vs. 100G Switching Architecture
Fewer Components, Less Space Fewer Fiber Connections, Less Complex
More Capacity and Scalability
Super-Channel ROADM
West East
North
South
WSS
WSS Tr
ansp
on
der
Tran
spo
nd
er
Tran
spo
nd
er
Add/drop
Tran
spo
nd
er 19 Line Modules
48 Patch Fibers* 2.5 Bays
West East
North
South
Add/drop
Tran
spo
nd
er
Tran
spo
nd
er
Tran
spo
nd
er
WSS
WSS
Tran
spo
nd
er
Tran
spo
nd
er
100G ROADM
Tran
spo
nd
er
Tran
spo
nd
er
Tran
spo
nd
er
96 Line Modules 136 Patch Fibers* 4+ Bays
*4-way Colorless ROADM Node, 8Tb/s WDM capacity per direction, 50% Add-Drop
11 | Infinera Confidential & Proprietary
Benefits of Super-Channel Based Switching
7-29% Additional Network Service Ready Capacity
with Super channels
Provisioned Capacity
OPEX Reduction – Fewer components, faster deployment time
Additional Service Ready Capacity
12 | Infinera Confidential & Proprietary
Conclusion
Multi Layer Switching - Combines the benefits of Digital and Optical Switching - Provides CAPEX and OPEX benefits with BW growth
Super-Channel Level Switching - Offers significant OPEX benefits with additional service ready capacity
13 | Infinera Confidential & Proprietary
Thank You
14 | Infinera Confidential & Proprietary
Super-Channel vs. 100G Switching Architecture
Fewer Components, More Reliable Fewer Fiber Connections, Less Complex
More Capacity and Scalability
Super-Channel ROADM
West East
North
South
WSS
WSS
Tran
spo
nd
er
Tran
spo
nd
er
Tran
spo
nd
er
Add/drop
Tran
spo
nd
er
40 FRUs 32 Patch Fibers*
West East
North
South
Add/drop
Tran
spo
nd
er
Tran
spo
nd
er
Tran
spo
nd
er
WSS
WSS
Tran
spo
nd
er
Tran
spo
nd
er
100G ROADM
Tran
spo
nd
er
Tran
spo
nd
er
Tran
spo
nd
er
176 FRUs 136 Patch Fibers*
* 4 degree ROADM Node, 4Tb/s WDM capacity per direction, 50% Add-Drop
FSP
FSP
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