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