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Deep Sea Cable Science Observatories Solution

Alcatel-Lucent's Dry-Wet architecture brings power and broadband to ocean depths, enhancing connectivity for science observatories. This groundbreaking technology allows for reliable and maintainable underwater networks. Explore the potential in offshore applications like oil and gas, neutrino telescopes, and tsunami detection systems.

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Deep Sea Cable Science Observatories Solution

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  1. Cable Science Observatories Solutions: Bringing Power and Broadband to Ocean Depths Antoine Lecroart Alcatel-Lucent

  2. Dry-Wet instead of Dry-Dry Architecture Line Design IP and PTP Powering OceanEngineering Conclusion Q&A Cable Science Observatories Solutions

  3. Traditional systems are Dry-Dry With cable, repeaters, BUs, equalizers being wet Being adapted to floating structures (Platforms or FPSOs) with dynamic risers Dry-Wet vs. Dry-Dry Trans-oceanic or Regional connectivity Deep water connectivity

  4. Very different to go Dry-Wet - Terminal needs to be wet Environmental challenge Sufficient reliability required MTTR is many months not a few hours Maintainability is key Power needs to be treated differently More power required locally on the sea bottom Variable loads Sub sea connectivity Dry-Wet vs. Dry-Dry

  5. Science Node Gateway for instruments(or junction boxes) Sturdy Backbone Telco grade equipmentCable, BUs, repeaters Maximize use of COTSequipment in the node Network designed for25 years Extendable Architecture: Overview

  6. 9 KW of power per node, 2 Protected GigE per node Use of Wet-mate connectors, ROV serviceable node Science Instruments Repeaters R Backbone cable JunctionBox Node BU ShoreTerminal R Science Instruments R ShoreTerminal R Science Instruments Node BU JunctionBox R R BU JunctionBox BU R Spur cable Branching Units Node Node JunctionBox Science Instruments JunctionBox Architecture: Overview

  7. Ring can use DWDM Each node has a set of wavelengths Dedicated bandwidth (not shared) Ring make powering easier to control Latching switching BU Ring is simpler No undersea routing necessary (Level 2 is enough) Ring is sturdier A node may be lost without affecting the rest of the network Node Node Pt. Alberni Station Node Node Architecture: Mesh vs. ring

  8. 10 KV DC transport requireddue to network size andremote extension capabilities Parallel mode is the onlyway to have large amountsof power at each site(9 KW) DC/DC conversion is mandatory(MV Converter) No more a constant currentlinear network but a DC power grid! Node Branching Unit Backbone Cable Power Feed Equipment MV Converter Spur Cable Node Pt. Alberni Shore Station Node Node Architecture: Series vs. Parallel

  9. Most of the constraints derived from small form factor node WDM transponder Based on Alcatel-Lucent 1696MS Compact Shelf with two transponders(facing East and West) Transponder boards Maps 2 GigE intoan STM-16/OC-48 FEC High Performance Optics Ring is designed for future extension Up to 1800 km Up to 10 nodes Some nodes could befurther upgraded to 10 Gbit/s Line Design

  10. Dual star with redundant GigE paths Alcatel-Lucent 7450 Routersand 6850 Switches (stacked) Network is designed totransport PTP packets withminimum delay to distributeprecision timing Tested with PTP serverand PTP client successfully Uses the latest Level 2 mechanisms such as LACP Minimizes delays andallows fast path protection Node Data Switches Data Switches Node Gigabit Ethernet Pt. Alberni Shore Station Node Node IP and PTP

  11. Powering is NEPTUNE’s main departure from a telco system and requires: An optically controlled four statepower switching BU (latching) BUs and repeaters qualified to up to 8A of line current A new high power (2 x 80 KW) PFE using the AC mains Powering

  12. Reliable 9KW 10 KV to 400 V DC converter in each node Parallel/Series arrangement of 48 elementary converters Powering: Medium Voltage Converter (MVC)

  13. Unique 400 V monitoring, control and distribution unit in each node Integrated with the Node Controller Built around a micro-controller Powering: Low Voltage Power System (LVPS)

  14. COTS equipment in the node call for the use of ROV wet-mate connectors to be able to service the node down to 3500 m Node is in two parts: Trawl Resistant Frame (TRF) Detachable Cable Termination Assembly (CTA) Ocean Engineering

  15. Node Module (NM) Can be disconnected fromthe Science Instrumentsand the TRF for maintenance Node module is made almostneutrally buoyant so thatit can be handled bya work class ROV Composed of the MVC andLV/Comms pressure vessels Ocean Engineering

  16. Alcatel-Lucent with its subcontractors (L-3 MariPro, Texcel, ODI, Heinzinger, Westermo, Omnitron) is developing the first large scale Dry-Wet network The University of Washington and the University of Victoria were the first to see the potential of this concept for oceanography but the demand is also soaring in Asia and Europe Conclusion

  17. This technology represents the new frontier of our industry and will allow our realm of applications to be further stretched to new fields such as offshore long tie backs for Oil and Gas, Neutrino telescopes or Tsunami detection systems Please take some time to visit the Alcatel-Lucent booth where a model of our science node is displayed Conclusion Thank you

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