Results 81 to 90 of about 347 (102)
On the legacy amplifier limitation in flexgrid optical networks [PDF]
2015 International Conference on Photonics in Switching (PS), 2015 Flexgrid technology is an interesting solution to improve network capacity. However, for a given spectral band, it gives rise to the increase of the number of channels, requiring more amplification power in respect with the conventional fixed grid technology.
Djamel Amar +2 more
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Modeling the routing and spectrum allocation problem for flexgrid optical networks
Photonic Network Communications, 2012 Flexgrid optical networks are attracting huge interest due to their higher spectrum efficiency and flexibility in comparison with traditional wavelength switched optical networks based on the wavelength division multiplexing technology. To properly analyze, design, plan, and operate flexible and elastic networks, efficient methods are required for
Luis Velasco +2 more
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Some of the next articles are maybe not open access.
Hose-model network virtualization in flexgrid optical networks
Journal of Optical Communications and Networking, 2020Network virtualization, which can flexibly and efficiently embed multiple client networks to a substrate network, is one of the most promising technologies to address the ossification problem of Internet infrastructure. This work focuses on studying the problem of hose-model network virtualization in general topology flexgrid optical networks.
Fengqing Liu, Weiguang He
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Online routing and spectrum assignment in flexgrid optical networks
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015In this paper we propose a novel method for online routing and spectrum assignment (RSA) in flexgrid optical networks based on the theory of Markov Decision Processes (MDP). This theory has already been successfully applied to optimum state-dependent routing in multiservice circuit switched networks.
Ronald Romero Reyes, Thomas Bauschert
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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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Robust spectrum allocation in elastic flexgrid optical networks: Complexity and formulations
Networks, 2017Flexgrid optical networking technology allows for a more flexible consumption of bandwidth. The spectrum allocation problem consists of the conflict‐free assignment of consecutive spectrum space of different sizes to lightpaths. In this article, we study the computational complexity of spectrum allocation with and without demand uncertainty.
Christina Busing +2 more
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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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An introduction to routing and wavelength assignment algorithms for fixed and flexgrid
Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013The presentation has discussed the following: general methods to solve optimization problems in networks; WDM networks, flexgrid networks and network planning and operation tools.
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Algorithm for FIPP p-cycle path protection in flexgrid networks
2014 IEEE Global Communications Conference, 2014In optical networks, faults in links and nodes cause massive loss of data even if for short periods. Therefore, protection techniques have been developed to cope with failures. Among these techniques, p-cycle is very attractive since it provides ring-like speed of restoration in mesh topologies.
Helder M. N. S. Oliveira +1 more
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