The Submarine Network Game - hknog.net · Metro/Regional. TLTE. TLTE. Terrestrial Backhaul....
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Copyright © Ciena Corporation 2018. All rights reserved. Confidential & Proprietary. The Submarine Network Game Anup Changaroth Senior Director, APAC CTO & Strategic Business Development March 2018 And the Implications of Shannon’s Limit Copyright © Ciena Corporation 2018. All rights reserved. Confidential & Proprietary.
Transcript of The Submarine Network Game - hknog.net · Metro/Regional. TLTE. TLTE. Terrestrial Backhaul....
Copyright © Ciena Corporation 2018. All rights reserved. Confidential & Proprietary.
The Submarine Network Game
Anup ChangarothSenior Director, APAC CTO & Strategic Business Development
March 2018
And the Implications of Shannon’s Limit
Copyright © Ciena Corporation 2018. All rights reserved. Confidential & Proprietary.
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AGENDA1. History & Anatomy of a Submarine Cable system2. Factoring in Shannon’s Limit3. Further developments
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Pop Quiz: In what year was the first Submarine cable installed?Answer: Across the English Channel in 1851, and the Atlantic in 1866! (Telegraph)
Source: Submarine Cable History, Wikipedia
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Global Submarine Cable Map
Source: TeleGeography
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Global Submarine Capacity
Source: TeleGeography
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Typical Anatomy of a Submarine Cable System
Actual End-to-End Service Path
City PoP
Terrestrial – SubmarineNetwork Demarcation
Submarine – TerrestrialNetwork Demarcation
City PoP
Cable LandingStation (CLS)
Submarine Cable
Repeaters
Cable LandingStation (CLS)
TerrestrialBackhual
TerrestrialBackhual
Submarine cable ship
40-100kmintervals
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Submarine cable Upgrades
Submarine Line Terminating Equipment
(SLTE)
Vendor X
Power FeedEquipment
Power FeedEquipment
Repeater Repeater Repeater RepeaterWet Plant Supervisory Equipment
Submarine Line Terminating Equipment
Wet Plant Supervisory Equipment
Cable Term
inating E
quipment
Cab
le T
erm
inat
ing
Equ
ipm
ent
Traditional Turnkey Submarine Cable network
Ciena SLTE
Vendor XCiena / Vendor X Ciena / Vendor X
Power FeedEquipment
Power FeedEquipment
Repeater Repeater Repeater RepeaterWet Plant Supervisory Equipment
Ciena SLTE
Wet Plant Supervisory Equipment
Cable Term
inating E
quipment
Cab
le T
erm
inat
ing
Equ
ipm
ent
Upgraded Open Submarine Cable network
Vendor X Submarine Line Terminating Equipment
(SLTE)
Vendor X Submarine Line Terminating Equipment
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AMP: Submarine Repeater (Amplifier)NID: Network Interface DeviceOEO: Optical-Electrical-OpticalOOO: Optical-Optical-OpticalPoP: Point of Presence
ROADM: Reconfigurable Optical Add/Drop MultiplexerSIE: SDH Interconnection EquipmentSLTE: Submarine Line Terminating EquipmentTLTE: Terrestrial Line Terminating EquipmentXCON: Cross-Connect
Switch/Router XCON
Metro/Regional
TLTE TLTE
Terrestrial Backhaul
Terrestrial – SubmarineNetwork Demarcation
SIE SLTE
Cable Landing Station Wet Plant
AMP
Data Center (PoP)
ConvergedSLTE/XCON
Switch/Router
ROADM
Cable Landing Station
Data Center (PoP)
AMP
Wet PlantTerrestrial Backhaul
Dark Fiber
Data Center to Data Center Direct Link
Simplifying Submarine Cable system – Ciena GeoMeshTM
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Why the ‘Shannon Limit’ Is a Key Factor in New Cable PlanningDesign choices today define future upgrade capacity
System LengthBandwidth Repeater TOP Fiber Loss
More Bandwidth & SNR = More Future Upgrade Capability
Repeater Spacing
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Shannon Limit
Shannon’s Limit on a New Coherent Cable
12 T
ITT Day 1 Capacity Ask
Deliver as cheap as possible!
Larger Repeater Spacing Shannon Limit↓$
↓$Lower Total Output Power Shannon Limit↓$
Cheaper Fibre Shannon Limit
Upgradeability
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Shannon’s Limit on a New Coherent Cable
12 T
ITT Day 1 Capacity Ask
Deliver as cheap as possible!
Shannon Limit
Upgradeability
Shannon’s Limit is “theory”…what about other real world limitations?
Nonlinear Impairments• Correctable with infinite DSP
Overhead for FEC & DSP• Shannon doesn’t include OH
Performance Margins• Shannon assumes no margin
Laser Aging & Drift• Shannon assumes Nyquist
Real World Limitations
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Shannon’s Limit on Legacy Cables – Room to Grow!
0.16 T 0.4 T1.5 T
2.5 T3.5 T
4.5 T5.5 T
Shannon Limit
2000 2005 2010 2015 2020 2025
0.04 T
2.5G 10G 40G 100G Next Gen Flexible Modems
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Shannon’s Limit on New Coherent Cables
12 T
18 T
24 T
30 T
Shannon Limit
2000 2005 2010 2015 2020 2025
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Upgrading 25% of Spectrum with Each Technology Generation
Additional 9T to reach Max Capacity requires
rip and replace
12T Ultimate Capacity
18T Ultimate Capacity
24T Ultimate Capacity
30T Ultimate Capacity
2015 2020 2025
3T 3T 3T
4.5T
3T
Spectrum 100% Occupied with 21T
4.5T
6T
4.5T
6T
7.5T
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Real-World Terrestrial Coherent Transmission Experience
Highest spectral efficiency per fibre pair ever achieved… 30.4 terabits per second
“
23 January 2018
…
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Packet-Optical Leadership
Successful field trial delivering live 400Gbps Ethernet traffic on a single wavelength … leveraged Ciena WaveLogic Ai
“
25 January 2018
…
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