Benefits of multi layer bandwidth management in next generation core optical networks

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Benefits of Multi-Layer Bandwidth Management in Next Generation Core Optical Networks Anuj Malik Product & Solutions Marketing WDM SGP 2014


The Service Provider Landscape Is Being Transformed

Content Video Data Center Cloud

Nonstop Bandwidth Growth

Networks Need Scale and Reliability


Solve the Capacity Challenge – Super-Channels

PIC-BASED 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

x10


Not just Capacity, Network trends are changing too ….

Fully filled super-channels

High-capacity “express” routes

Optical-layer restoration <50ms service protection

Highly meshed demands

Low add/drop collector networks

Many 100G+ services Many <100G services

Digital Switching Optical Switching

Express

Collector

Optimized with Optimized with


Value of Multi-layer Switching Automate Everything !

Fully filled super-channels

High-capacity “express” routes

Optical-layer restoration <50ms service protection

Highly meshed demands

Low add/drop collector networks

Many 100G+ services Many <100G services

Digital Switching Optical Switching

Express

Collector

Optimized with Optimized with Digital Switching Optical Switching

Digital grooming maximizes WDM fill -> CapEx savings

Sub-l switching & service protection -> OpEx savings

ODU0/flex and packet switching granularity

Reconfigurable super-channel switching -> OpEx Savings

Optical express of filled super-channels -> CapEx savings

Wavelength & super-channel granularity

Photonic switching of 500G/1T super-channels

Service-level digital switching & grooming

(Ethernet/SDH/OTN/SAN)


WDM Network

Value of Integrated Switching Without Digital Switching: Inefficient, Static

4 x 10G 1 3 x 10G

1 x 10G • “Services over wavelengths” • “Muxponder tax” inefficiency • Optical-only switching • No digital switching & reconfiguration • Patch panel & truck-roll re-grooming

All-Optical

Many, poorly filled wavelengths

10% fill

40% fill

30% fill

1x10G 100G l

4x10G 100G l

100G l 3x10G


WDM Network

Switching Network

Value of Integrated Switching WDM + Stand-alone OXC’s: 2 Platform Solution

Standalone OXC

• OXC provides network efficiency • 2 platform solution: space & power • Back-back client connections • Segmented provisioning/protection • No end-end management/automation

• “Services over wavelengths” • “Muxponder tax” inefficiency • Optical-only switching • No digital switching & reconfiguration • Patch panel & truck-roll re-grooming

All-Optical

Switching increases l utilization

10% fill

40% fill

30% fill

4x10G 1 3x10G

1x10G

$$$, complexity,

space, & power

80% fill

1x10G 100G l

4x10G 100G l

100G l 3x10G


WDM Network

Switching Network

4x10G 1 3x10G

1x10G

$$$, complexity,

space, & power

Value of Integrated Switching Collapsing Layers, Simplifying Networks

Converged DWDM &

OTN Switching

• Converged OTN/WDM switching • Eliminate I/C cost, extra space/power • Eliminates many points of failure • Automated, end-end provisioning • End-to-end service protection

Standalone OXC

• OXC provides network efficiency • 2 platform solution: space & power • Back-back client connections • Segmented provisioning/protection • No end-end management/automation

• “Services over wavelengths” • “Muxponder tax” inefficiency • Optical-only switching • No digital switching & reconfiguration • Patch panel & truck-roll re-grooming

All-Optical

4 x 10G

3 x 10G

1x 10G

Efficient converged network

10% fill

40% fill

30% fill

80% fill

1x10G 100G l

4x10G 100G l

100G l 3x10G


Range of “Optical Switching” 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


C-D-C FlexROADM

Benefits of Super-Channel CDC ROADM

“Pay-as-you-grow” of channel mux (Directionless) -> lowers CapEx

“Install and Forget” installation of WDM line modules -> lowers OpEx

75% (typ) fewer fibers vs. 100G wave ROADMs

Simpler wavelength planning (Colorless and Contentionless)

Enables Layer 0 restoration: lower CapEx & enhanced services


Super-Channel vs. 100G Switching Architecture

Fewer Components, Less Space Fewer Fiber Connections, Less Complex,

More Reliable

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


Increase in ROADM Add/Drop Capacity with Super-Channels

Typical CDC ROADM Architecture

WSS and MCS – Off the Shelf Components WSS : 1 x 16 MCS: 8 x 12

Super-Channel ROADM has more capacity and Scalable

Add/Drop percentage of super-channel based ROADM and 100G ROADM

0

10

20

30

40

50

60

70

80

90

100

2 3 4 5 6 7 8

1T SC CDC ROADM

500G SC CDCROADM

100G CDC ROADM

Number of Degrees

% of Add/Drop


Unified “Ease Of Use” with Digital & Photonic Domain Automate Everything

GMPLS: WSON/SSON Route Computation Point and Click Provisioning

Network

Failure

Auto-Restored

Traffic

P

Digital Domain

P

P P

P P

P P

Hello Hello

Photonic Domain

ADAPT Automatic adjustment & monitoring of

WDM parameters “Hands-free” link turn-up & optimization

Auto-Discovery Topology Discovery Inventory and Configuration Management

Restoration <50ms Digital FastSMP protection Multi-second Optical GMPLS restoration


Express

Collector

Sub-super-channel services multiplexed by OTN switching

Super-channels become efficiently & fully filled

Capex Example: Can now optically express super-channels at Node C

Opex & Revenue Example: If traffic patterns change, super-channels can be re-groomed quickly & without truck rolls

Digital Add/Drop Optical

Switching

C

Benefit of Multi-Layer Switching Rapid Customer Adds


Network Study


Architecture Comparisons

All Digital Switching Architecture

All Optical Switching Architecture

Multi-Layer Switching Architecture


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


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


Benefits of Multi Layer Switching

CAPEX Reduction: 13-22% less number of 100G ports

All Digital Switching More efficient with less filled

demands

All Optical Switching More efficient with fully filled

demands

Multi Layer Switching Combines benefits of both

digital and optical switching


Benefits of Super-Channel Based Switching

OPEX Reduction – Fewer components, faster deployment time

Additional Service Ready Capacity


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


Thank You

Technology

Benefits of multi layer bandwidth management in next generation core optical networks