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Energy efficiency of elastic frequency grids in multilayer IP/MPLS-over-flexgrid networks [PDF]
Journal of Network and Computer Applications, 2015 Flexgrid Optical Networks provide higher spectrum efficiency and flexibility in comparison to traditional wavelength switched optical networks (WSON) due to the finer granularity in managing communication channels at the WDM layer, thus allowing beyond ...
Sérgio Ricciardi +2 more
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QoS-Aware Protection in Flexgrid Optical Networks
Journal of Optical Communications and Networking, 2017Elastic optical networks generally rely on protection and restoration mechanisms to prevent the detrimental effect of fiber cuts. In particular, we investigate optical protection in flexgrid optical networks where the symbol rate is varied as a complementary approach to modulation format.
Patricia Layec +3 more
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Extending the flexgrid optical core towards the edges
, 2013 National IP/MPLS network have being designed on top of fixed-grid DWDM optical networks so to spread out covering large areas. Besides, multilayer IP/MPLS-over-DWDM networks take advantage from grooming to achieve high spectrum efficiency, filling the ...
Luis Velasco, Marc Ruiz, A Castro
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ILP modeling of flexgrid SDM optical networks
2016 17th International Telecommunications Network Strategy and Planning Symposium (Networks), 2016Due to continuously increasing popularity of various network services the overall Internet traffic grows quickly. According to the recent Visual Networking Index report published by Cisco, the IP traffic will grow at a compound annual growth rate (CAGR) of 22 percent from 2015 to 2020. Space division multiplexing (SDM) in optical networks seems to be a
Krzysztof Walkowiak +3 more
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Optical Switching and Networking, 2015 A novel Class-Based First Fit (CBFF) spectrum allocation policy is proposed for dynamic flexgrid optical networks. The effectiveness of the proposed CBFF policy is compared with that of the First Fit (FF) policy for single-link and network scenarios ...
Nail Akar, Ezhan Karasan
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Selection of spectral-spatial channels in SDM flexgrid optical networks
2017 International Conference on Optical Network Design and Modeling (ONDM), 2017Space division multiplexing (SDM) is a promising solution with the scaling potential to overcome the possible capacity crunch problem in optical backbone networks. The key idea behind SDM is to exploit the spatial dimension to provide a significant increase in the transmission system capacity. In SDM, optical signals are transmitted in parallel through
Piotr Lechowicz +2 more
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Spectrum defragmentation in flexgrid optical networks using a genetic algorithm
International Journal of Communication Systems, 2013SUMMARYFlexgrid optical networking is an attractive solution for efficiently matching allocated bandwidth with link demand but suffers from inevitable spectrum fragmentation. Spectrum fragmentation impairs network performance and results in high blocking rate and low spectrum utilization efficiency.
Weiguo Ju +4 more
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Efficient Modeling of the Routing and Spectrum Allocation Problem for Flexgrid Optical Networks
2021 International Conference on Optical Network Design and Modeling (ONDM), 2021While the problem of Routing and Spectrum Allocation (RSA) has been widely studied, very few studies attempt to solve realistic sized instances. Indeed, the state of the art is always below the standard transport capacity of a fiber link with 384 frequency slots, regardless of what the authors consider, heuristics or exact methods with a few exceptions.
Brigitte Jaumard, Quang Anh Nguyen
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Robust plans for spectrum allocation in elastic flexgrid optical networks
2016 8th International Workshop on Resilient Networks Design and Modeling (RNDM), 2016We study the spectrum allocation problem in flexgrid optical networks under demand uncertainty. Using elastic spectrum allocation the slots assigned to a lightpath can be changed under different restrictions without service disruption. We study five different technologies to manage these changes. It is shown that the two least efficient models are less
Christina Büsing +2 more
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A programmable optical few wavelength source for flexgrid optical networks
Optical Fiber Technology, 2016Abstract Multi-wavelength (MW) sources will probably replace discrete lasers or laser arrays in next generation multi-carrier transponders (e.g., 1 Tb/s), currently called multi-flow transponders or sliceable bandwidth variable transponders (SBVTs). We present design and experimental demonstration of a few wavelength (FW) source suitable for SBVTs ...
IMRAN, MUHAMMAD +5 more
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