2016 02 03 - efficient optical transport layer for high-capacity optical networking - ngon africa 2016 conference - xtera

© 2016 Xtera Communications, Inc. Proprietary & Confidential 1

Efficient Optical Transport Layer for High-Capacity Optical Networking

Bertrand Clesca – Head of Global Marketing – Xtera Communications

2-3 February 2016

NGON Africa 2016 (Cape Town, South Africa)


• Capacity trends: Why and how much?

• New players: New types of service providers and network operators with new requirements

• Case study: Efficient DCI Terrestrial restoration alternatives for subsea cable systems as enabled by coherent technologies and Raman optical amplification

Content


Capacity Trends: Why and How Much?


Every Minute…

Facebook users share nearly 2.5 million pieces of content.

Twitter users tweet nearly 300,000 times.

Instagram users post nearly 220,000 new photos.

YouTube users upload 72 hours of new video content.

Apple users download nearly 50,000 apps.

Email users send over 200 million messages.

Amazon generates over $80,000 in online sales.

Google receives over 4,000,000 search queries.

Pandora users listen to 62,000 hours of music.

Yelp users post 26,000 reviews.

Skype users connect for 23,300 hours

Tinder users swipe 416,667 times.

WhatsApp users share 347,222 photos.Source: Simon CooperCOO, NEXTDC Limited

SNW Singapore 2015 Presentation


… Leading to Huge Growth inCore Network Traffic

Analysis of the growth in core network traffic (purple curve) since the dawn of the Internet era in terms of the constituent five-year trend segments (data shown with expanded scales). Source: Bell Labs Consulting.

1st era of the internet 2nd era


Capacity and Reach Limitations With EDFA-Based Networks


New Networks Requirements


• Dense, mesh network with many traffic locations

• Fibers owned, plenty of dark fibers available

Traditional Telecom Networks


• By design, fiber drops at very few locations Long

spans

OPGW NetworkOPGW Network Over Power Grids


• Network on leased fibers with few traffic locations

• Sparse population distribution and power availability issues Long spans

Backbone/Backhaul Networks


• Technical + commercial innovations

• Long span capability vs back-to-back terminal equipment (red sites) Long reach and high capacity

Backhaul Networks for Subsea Cable Systems

London

Dublin


• Sparse network Long reach

• Large pipes over leased fibers High capacity

• Benefits from skipping sites Long spans

Data Center Operator Networks


No Major Content Provider Data Centers in Africa in 2015


No Major Content Provider Data Centers in Africa Planned in 2017


Terrestrial Connectivity Needs in Africa


Light to Africa In The Old Days

Optical international connectivityMain subsea routes to Africa before 2009


Light to Africa In The Old Days

Optical international connectivityBuilding new subsea routes to Africa


Light to Africa Today

Optical international connectivityMain subsea routes to Africa today


Need For More Diversity

January 2016:• Three subsea cable cuts off Alexandria• Cuts on two

independentterrestrialsegmentsacrossEgypt

74% ofinternetconnectivitylost in Gulfcountries,and 100% in South Africa for few hours


Need For More Light Into Africa

To backhaul traffic to land-locked countriesand inland PoPs / DCs

To offer restorationalternatives forsubsea cable systems


• Efficient optical layer

– Long end-to-end reach

– Long spans between sites

– Plus:

Reliability

Flexibility

Capacity

Low latency

Etc.

• More backhaul networks areneeded for route diversity and global resiliency.

Need For Optical Backhaul Networks


Power Grids: Infrastructure Suitable for Optical Network

Aluminum alloy

Aluminum-clad steel

Stainless steel tube

Optical fiber

OPGW cable between transmission towers


Power Grids: Infrastructure Suitable for Optical Networks

• OPGW cable between transmission towers

• Not a telco network:

– Long distances between

intermediate ODF sites







– Telecom sites maybe off the

power grid







– Telecom sites maybe off the

power grid

Very long spans


Xtera’s [Capacity – Reach] Metric In Terrestrial Networks


Xtera’s [Capacity – Reach] MetricUnrepeatered Links


• Interface cards On a per wavelength basis

• Line amplifiers A few to several

• Line fiber On a per kilometer basis

Components ofOptical Transport Layer

In-LineAmplifier (ILA)

Reconfigurable OpticalAdd Drop Multiplexer

(ROADM)BoosterAmplifier

Pre-Amplifier

Interface cards Interface cards


Raman-Assisted TransmissionFor Multi-Span Transport

Much lessbreathing

Higher noise performance

Raman chain

Lower non-linearity

A

Backward Raman pumping Forward Raman pumping

Fiber attenuation

Distributed Ramangain

B C D E F

DistancePer

channel pow

er

pro

file

Lower limit: Optical noise accumulation

Upper limit: Nonlinear distortions

Highpeak-to-peakpowerexcursion

EDFA chain

A B C D E F

Fiberattenuation

Powerboost


2,266 km Amazon Network

ROADM

43 km13.9 dB

237 km53.8 dB

278 km63.1 dB

ILAILA ROADM

142 km34.6 dB

ILA 138 km33.1 dB

235 km53.5 dB

ILAVilla

Camburão

ROADM

183 km46.1 dB

141 km33.9 dB

157 km37.2 dB

ILAILA ILA

91 km23.8 dB

ILA

229 km52.8 dB

ROADM

239 km54.2 dB

110 km27.2 dB

ROADM

ILA ILA

43 km13.9 dB

ManausTIM

Terra SantaManausRod Lexuga

Silves Oriximiná

MacapáTIM

Jurupari

Macapá Sub Laranjal do Jari

Gopa XinguTucuruí Pacaja Vitória do Xingu

Coreamplifier

Backward Raman spanextension module

Forward Raman spanextension module

G.652fiber span

Longest span:• 278 km• 63 dB


• Multi Terabit route with only two regeneration sites

• To be compared with subsea route via South Africa:

– Twice lower latency

– Saving 4 interface cards Lower cost per transported bit

Applicability to Africa

Kinshasa

Muanda

Inga

Cablelandingstation

Cablelandingstation


• Stronger terrestrial backhaul networks required for:

– Backhauling subsea capacity inland

– Offering restoration alternatives to subsea cable systems

– Higher global land/subsea resiliency

• Raman amplification enables:

– Long spans between sites (as found in OPGW networks or

sparsely populated areas)

– Long end-to-end reach (as required by African geography)

– Efficient transport of 100G/200G/400G channels with the

minimal number of inline amplification and regeneration sites

– Turning OPGW plant into future proof optical networks

Summary


Maximizing Network Capacity, Reach and ValueOver land, under sea, worldwide

Technology

2016 02 03 - efficient optical transport layer for high-capacity optical networking - ngon africa 2016 conference - xtera