A modular Gigabit Ethernet backbone for NEPTUNE and other ocean observatories

Maffei, A. R.; Chave, Alan D.; Bailey, John W.; Bradley, A. M.; García, Xavier; Gelman, H.; Lerner, Sorin; Sonnichsen, Frederick

doi:10.1109/ssc.2003.1224140

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…3) is meshed, and the communications system gains reliability from redundant paths, as is also true for the Internet. There are multiple arguments for this design approach, as reviewed by Maffei et al (2003).…”

Section: Meshed Network Versus Star Data Communications Architecturementioning

confidence: 99%

Science requirements and the design of cabled ocean observatories

Chave

Massion

Mikada

2009

Annals of Geophysics

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The ocean sciences are beginning a new phase in which scientists will enter the ocean environment and adaptively observe the Earth-Ocean system through remote control of sensors and sensor platforms. This new ocean science paradigm will be implemented using innovative facilities called ocean observatories which provide unprecedented levels of power and communication to access and manipulate real-time sensor networks deployed within many different environments in the ocean basins. Most of the principal design drivers for ocean observatories differ from those for commercial submarine telecommunications systems. First, ocean observatories require data to be input and output at one or more seafloor nodes rather than at a few land terminuses. Second, ocean observatories must distribute a lot of power to the seafloor at variable and fluctuating rates. Third, the seafloor infrastructure for an ocean observatory inherently requires that the wet plant be expandable and reconfigurable. Finally, because the wet communications and power infrastructure is comparatively complex, ocean observatory infrastructure must be designed for low life cycle cost rather than zero maintenance. The origin of these differences may be understood by taking a systems engineering approach to ocean observatory design through examining the requirements derived from science and then going through the process of iterative refinement to yield conceptual and physical designs. This is illustrated using the NEPTUNE regional cabled observatory power and data communications sub-systems.

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Section: Meshed Network Versus Star Data Communications Architecturementioning

confidence: 99%

Science requirements and the design of cabled ocean observatories

Chave

Massion

Mikada

2009

Annals of Geophysics

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“…The optical transport can be implemented using either multiple optical fiber pairs, with one pair supporting full duplex transmission at the design data rate (1 or 10 Gb/s), or using dense wavelength division multiplexing on a small number of fibers. A Gigabit Ethernet/DWDM backbone supporting an aggregate data rate of at least 8 Gb/s has been selected for the NEPTUNE baseline design, as described by Maffei et al (2003). For a mesh network at points where a given node may connect with more than two others, the node-resident backbone communications sub-subsystem typically operates at layer 3 (i.e., network layer) as a router.…”

Section: A Generic Cabled Ocean Observatorymentioning

confidence: 99%

Cabled Ocean Observatory Systems

Chave¹,

Waterworth²,

Maffei³

et al. 2004

mar technol soc j

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Future studies of episodic processes in the ocean and earth will require new tools to complement traditional, ship-based, expeditionary science. This will be enabled through the construction of innovative facilities called ocean observatories which provide unprecedented amounts of power and two-way bandwidth to access and control instrument networks in the oceans. The most capable ocean observatories are designed around a submarine fiber optic/power cable connecting one or more seafloor science nodes to the terrestrial power grid and communications backhaul. This paper defines the top level requirements that drive cabled observatory design and the system engineering environment within which a scientifically-capable infrastructure can be implemented. Commercial high reliability submarine telecommunication technologies which will be crucial in the design of long term cabled observatories are then reviewed. The top level architecture of a generic cabled observatory, describing the main subsystems comprising the whole and defining technological approaches to their engineering, is then described, along with some example design choices and tradeoff studies.

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