The Experts below are selected from a list of 83427 Experts worldwide ranked by ideXlab platform
S J B Yoo - One of the best experts on this subject based on the ideXlab platform.
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3d elastic Optical Networking in the temporal spectral and spatial domains
IEEE Communications Magazine, 2015Co-Authors: Roberto Proietti, Ryan P. Scott, Lei Liu, Binbin Guan, Chuan Qin, F Giannone, S J B YooAbstract:Conventional elastic Optical Networking, EON, uses elasticity in two domains, time and frequency, to optimize utilization of Optical network resources in the presence of fluctuating traffic demand and link quality. Currently, Networking exploiting a third domain, space, is the focus of significant research efforts since space-division multiplexing, SDM, has the potential to substantially improve future network capacity and spectral efficiency. This article extends 2D-EON to include elasticity in all three domains: time, frequency, and space. We introduce enabling technologies, architectures, and algorithms for 3D-EONs. Based on sample network topologies, we investigate algorithms for routing, spectrum, spatial mode, and modulation format assignment — RSSMA. In particular, we investigate fragmentation-aware RSSMA and how the constraints in the formation of super-channels in MIMO-based SDM systems can impact the network performance in terms of blocking probability.
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split spectrum a multi channel approach to elastic Optical Networking
Optics Express, 2012Co-Authors: Ming Xia, Stefan Dahlfort, Roberto Proietti, S J B YooAbstract:This paper introduces Split Spectrum, which enhances elastic Optical Networking by splitting a bulk traffic demand into multiple channels, when a single-channel transmission is prohibited by distance or spectrum availability. We performed transmission simulations to determine the maximum reach as a function of modulation format (dual polarization BPSK, QPSK, 16QAM), baud-rate (from 5 to 28 GBd), and number of ROADMs, for a Nyquist WDM super-channel with subcarrier spacing equal to 1.2 × baud-rate. Performance evaluation on two representative topologies shows that, compared to the previously proposed elastic Optical Networking, Split Spectrum doubles the zero-blocking load and achieves 100% higher network spectral efficiency at zero-blocking loads as a result of extended transmission distance and efficient utilization of spectrum fragments.
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elastic Optical Networking a new dawn for the Optical layer
IEEE Communications Magazine, 2012Co-Authors: Ori Gerstel, Masahiko Jinno, Andrew Lord, S J B YooAbstract:Optical networks are undergoing significant changes, fueled by the exponential growth of traffic due to multimedia services and by the increased uncertainty in predicting the sources of this traffic due to the ever changing models of content providers over the Internet. The change has already begun: simple on-off modulation of signals, which was adequate for bit rates up to 10 Gb/s, has given way to much more sophisticated modulation schemes for 100 Gb/s and beyond. The next bottleneck is the 10-year-old division of the Optical spectrum into a fixed "wavelength grid," which will no longer work for 400 Gb/s and above, heralding the need for a more flexible grid. Once both transceivers and switches become flexible, a whole new elastic Optical Networking paradigm is born. In this article we describe the drivers, building blocks, architecture, and enabling technologies for this new paradigm, as well as early standardization efforts.
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demonstration of spectral defragmentation in flexible bandwidth Optical Networking by fwm
IEEE Photonics Technology Letters, 2011Co-Authors: David J Geisler, Ke Wen, Yawei Yin, Ryan P. Scott, Nicolas K Fontaine, Shuo Chang, S J B YooAbstract:Flexible bandwidth elastic Optical Networking is an attractive solution for efficiently matching allocated bandwidth with link demand, but suffers from inevitable spectral fragmentation. In this letter, we discuss spectral defragmentation in flexible bandwidth networks using four-wave mixing (FWM) and wavelength selective switch (WSS)-based wavelength conversion blocks. Simulations show a defragmentation degree of one (i.e., the number of defragmentation blocks equals one) results in 71% and 47% reductions in blocking probability under high offered load (680 Erlangs) and low offered load (220 Erlangs), respectively. Further reductions in blocking probability result from an increased defragmentation degree. Experimental results show spectral defragmentation over 500 GHz of bandwidth for a defragmentation degree of one, validating FWM- and WSS-based spectral defragmentation in flexible bandwidth networks.
Roberto Proietti - One of the best experts on this subject based on the ideXlab platform.
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survey of photonic switching architectures and technologies in support of spatially and spectrally flexible Optical Networking invited
Journal of Optical Communications and Networking, 2017Co-Authors: Dan M Marom, Roberto Proietti, Nicolas K Fontaine, Paul D Colbourne, A Derrico, Yuichiro Ikuma, Liangjia Zong, Jose Manuel Rivasmoscoso, I TomkosAbstract:As traffic volumes carried by Optical networks continue to grow by tens of percent year over year, we are rapidly approaching the capacity limit of the conventional communication band within a single-mode fiber. New measures such as elastic Optical Networking, spectral extension to multi-bands, and spatial expansion to additional fiber overlays or new fiber types are all being considered as potential solutions, whether near term or far. In this tutorial paper, we survey the photonic switching hardware solutions in support of evolving Optical Networking solutions enabling capacity expansion based on the proposed approaches. We also suggest how reconfigurable add/drop multiplexing nodes will evolve under these scenarios and gauge their properties and relative cost scalings. We identify that the switching technologies continue to evolve and offer network operators the required flexibility in routing information channels in both the spectral and spatial domains. New wavelength-selective switch designs can now support greater resolution, increased functionality and packing density, as well as operation with multiple input and output ports. Various switching constraints can be applied, such as routing of complete spatial superchannels, in an effort to reduce the network cost and simplify the routing protocols and managed pathway count. However, such constraints also reduce the transport efficiency when the network is only partially loaded, and may incur fragmentation. System tradeoffs between switching granularity and implementation complexity and cost will have to be carefully considered for future high-capacity SDM–WDM Optical networks. In this work, we present the first cost comparisons, to our knowledge, of the different approaches in an effort to quantify such tradeoffs.
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3d elastic Optical Networking in the temporal spectral and spatial domains
IEEE Communications Magazine, 2015Co-Authors: Roberto Proietti, Ryan P. Scott, Lei Liu, Binbin Guan, Chuan Qin, F Giannone, S J B YooAbstract:Conventional elastic Optical Networking, EON, uses elasticity in two domains, time and frequency, to optimize utilization of Optical network resources in the presence of fluctuating traffic demand and link quality. Currently, Networking exploiting a third domain, space, is the focus of significant research efforts since space-division multiplexing, SDM, has the potential to substantially improve future network capacity and spectral efficiency. This article extends 2D-EON to include elasticity in all three domains: time, frequency, and space. We introduce enabling technologies, architectures, and algorithms for 3D-EONs. Based on sample network topologies, we investigate algorithms for routing, spectrum, spatial mode, and modulation format assignment — RSSMA. In particular, we investigate fragmentation-aware RSSMA and how the constraints in the formation of super-channels in MIMO-based SDM systems can impact the network performance in terms of blocking probability.
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Software defined elastic Optical Networking in temporal, spectral, and spatial domains
Photonic Network Communications, 2014Co-Authors: Roberto Proietti, Ryan P. ScottAbstract:This paper discusses architecture, protocol, technologies, systems, and Networking testbed for software-defined elastic Optical Networking in temporal, spectral, and spatial domains. By exploiting the progress in elastic Optical Networking (EON) in temporal and spectral domains utilizing dynamic Optical arbitrary waveform generation and measurement technologies, and by extending the EON concept into the spatial domain through the new orbital angular momentum-based spatial division multiplexing, we realize EON exploiting elasticity in temporal, spectral, and spatial domains (3D-EON). Routing, spectral, spatial mode, and modulation format assignment with fragmentation awareness as well as hitless defragmentation for high capacity, high quality of service, and resource-efficient Networking will be pursued. OpenFlow-based 3D-EON testbed at UC Davis includes Optical supervisory channel with Optical performance monitoring for software-defined Networking with an adaptive observe-analyze-act cycle.
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split spectrum a multi channel approach to elastic Optical Networking
Optics Express, 2012Co-Authors: Ming Xia, Stefan Dahlfort, Roberto Proietti, S J B YooAbstract:This paper introduces Split Spectrum, which enhances elastic Optical Networking by splitting a bulk traffic demand into multiple channels, when a single-channel transmission is prohibited by distance or spectrum availability. We performed transmission simulations to determine the maximum reach as a function of modulation format (dual polarization BPSK, QPSK, 16QAM), baud-rate (from 5 to 28 GBd), and number of ROADMs, for a Nyquist WDM super-channel with subcarrier spacing equal to 1.2 × baud-rate. Performance evaluation on two representative topologies shows that, compared to the previously proposed elastic Optical Networking, Split Spectrum doubles the zero-blocking load and achieves 100% higher network spectral efficiency at zero-blocking loads as a result of extended transmission distance and efficient utilization of spectrum fragments.
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split spectrum approach to elastic Optical Networking
European Conference and Exhibition on Optical Communications, 2012Co-Authors: Stefan Dahlfort, Roberto ProiettiAbstract:This paper introduces the Split Spectrum approach to elastic Optical Networking and its figure of merit. Compared to elastic Optical Networking, Split Spectrum allows at least 50% more non-blocking traffic and 50% higher network spectral efficiency at non-blocking loads for the investigated scenarios.
Ryan P. Scott - One of the best experts on this subject based on the ideXlab platform.
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3d elastic Optical Networking in the temporal spectral and spatial domains
IEEE Communications Magazine, 2015Co-Authors: Roberto Proietti, Ryan P. Scott, Lei Liu, Binbin Guan, Chuan Qin, F Giannone, S J B YooAbstract:Conventional elastic Optical Networking, EON, uses elasticity in two domains, time and frequency, to optimize utilization of Optical network resources in the presence of fluctuating traffic demand and link quality. Currently, Networking exploiting a third domain, space, is the focus of significant research efforts since space-division multiplexing, SDM, has the potential to substantially improve future network capacity and spectral efficiency. This article extends 2D-EON to include elasticity in all three domains: time, frequency, and space. We introduce enabling technologies, architectures, and algorithms for 3D-EONs. Based on sample network topologies, we investigate algorithms for routing, spectrum, spatial mode, and modulation format assignment — RSSMA. In particular, we investigate fragmentation-aware RSSMA and how the constraints in the formation of super-channels in MIMO-based SDM systems can impact the network performance in terms of blocking probability.
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Software defined elastic Optical Networking in temporal, spectral, and spatial domains
Photonic Network Communications, 2014Co-Authors: Roberto Proietti, Ryan P. ScottAbstract:This paper discusses architecture, protocol, technologies, systems, and Networking testbed for software-defined elastic Optical Networking in temporal, spectral, and spatial domains. By exploiting the progress in elastic Optical Networking (EON) in temporal and spectral domains utilizing dynamic Optical arbitrary waveform generation and measurement technologies, and by extending the EON concept into the spatial domain through the new orbital angular momentum-based spatial division multiplexing, we realize EON exploiting elasticity in temporal, spectral, and spatial domains (3D-EON). Routing, spectral, spatial mode, and modulation format assignment with fragmentation awareness as well as hitless defragmentation for high capacity, high quality of service, and resource-efficient Networking will be pursued. OpenFlow-based 3D-EON testbed at UC Davis includes Optical supervisory channel with Optical performance monitoring for software-defined Networking with an adaptive observe-analyze-act cycle.
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demonstration of spectral defragmentation in flexible bandwidth Optical Networking by fwm
IEEE Photonics Technology Letters, 2011Co-Authors: David J Geisler, Ke Wen, Yawei Yin, Ryan P. Scott, Nicolas K Fontaine, Shuo Chang, S J B YooAbstract:Flexible bandwidth elastic Optical Networking is an attractive solution for efficiently matching allocated bandwidth with link demand, but suffers from inevitable spectral fragmentation. In this letter, we discuss spectral defragmentation in flexible bandwidth networks using four-wave mixing (FWM) and wavelength selective switch (WSS)-based wavelength conversion blocks. Simulations show a defragmentation degree of one (i.e., the number of defragmentation blocks equals one) results in 71% and 47% reductions in blocking probability under high offered load (680 Erlangs) and low offered load (220 Erlangs), respectively. Further reductions in blocking probability result from an increased defragmentation degree. Experimental results show spectral defragmentation over 500 GHz of bandwidth for a defragmentation degree of one, validating FWM- and WSS-based spectral defragmentation in flexible bandwidth networks.
R Marz - One of the best experts on this subject based on the ideXlab platform.
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pan european Optical Networking using wavelength division multiplexing
IEEE Communications Magazine, 1997Co-Authors: M Berger, M Chbat, Amaury Jourdan, M Sotom, P Demeester, B Van Caenegem, P J Godsvang, B Hein, M Huber, R MarzAbstract:The development of the information society will require the introduction of high-capacity transport networks with high performance and low cost. There are currently two ACTS (Advanced Communications Technologies and Services program launched by the European Commission) projects addressing specifically the problem of trans-European Optical transport networks using WDM (wavelength division multiplexing). Important issues addressed are the high capacity transmission on existing fiber infrastructure and the introduction of flexibility in the network through the use of Optical cross-connects. If these networks become a reality, they could drastically change the evolution of both telecommunication and computer Networking because of their transparency and the abundance of inexpensive bandwidth.
Lena Wosinska - One of the best experts on this subject based on the ideXlab platform.
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agile filterless Optical Networking
Optical Network Design and Modelling, 2017Co-Authors: Christine Tremblay, Paul Littlewood, Michel P Belanger, Lena Wosinska, Jiajia ChenAbstract:Filterless Optical networks based on broadcast-and-select nodes equipped with coherent transceivers can be considered as very attractive solutions for cost-effective and flexible capacity allocation in terrestrial and submarine applications. In this paper, we present an overview of the research on filterless Optical Networking in the last 10 years.
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dimensioning the future pan european Optical network with energy efficiency considerations
IEEE\ OSA Journal of Optical Communications and Networking, 2011Co-Authors: Anna Tzanakaki, Mario Pickavet, Kostas Katrinis, Dimitra Simeonidou, Alexandros Stavdas, T Politi, P Van Daele, M J Omahony, Slavisa Aleksic, Lena WosinskaAbstract:This paper studies the overall energy consumption of a pan-European Optical transport network for three different time periods: today and in five and ten years from now. In each time period the pan-European network was dimensioned using traffic predictions based on realistic data generated by the Optical Networking roadmap developed in the framework of the European project Building the Future Optical Network in Europe-BONE. A wavelength routed wavelength division multiplexed Optical network based on either transparent or opaque node architectures was examined considering exclusively either 10 Gbit/s or 40 Gbit/s per channel data rates. The results manifest that transparent Optical Networking technologies are expected to provide significant energy savings of the order of 35% to 55%. It was also shown that the migration towards higher data rates, i.e., from 10 Gbit/s to 40 Gbit/s, is assisting in improving the overall energy efficiency of the network.