Journal ArticleDOI
Dynamic Versus Static Wavelength-Routed Optical Networks
A. Zapata-Beghelli,Polina Bayvel +1 more
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TLDR
New analytical and algorithmic lower bounds for the wavelength requirements of dynamic networks are proposed to evaluate the optimality of the already proposed algorithms whose wavelength requirements are quantified - by means of simulation- with and without the wavelength continuity constraint.Abstract:
It is widely believed that dynamic operation of wavelength-routed optical networks will help overcome the inefficiencies of static allocation in terms of wavelength utilization. In this paper, this hypothesis is reviewed. The wavelength requirements of dynamic wavelength-routed optical networks are quantified and compared to static routing. To do so, new analytical and algorithmic lower bounds for the wavelength requirements of dynamic networks are proposed. They are used to evaluate the optimality of the already proposed algorithms whose wavelength requirements are quantified - by means of simulation- with and without the wavelength continuity constraint, as well as for uniform and nonuniform traffic demand. Results show that, without wavelength conversion capability, the benefit of dynamic wavelength-routed optical networks is not significant: lower wavelengths requirements than static networks are achieved only at low traffic loads (< 0.3 - 0.4). In wavelength convertible networks instead, dynamic operation leads to lower wavelength requirements than static operation over a wide traffic load range (< 0.7 - 0.8), making dynamic operation attractive in this type of network. Under nonuniform traffic it was found that dynamic operation achieves slightly higher wavelength savings than in the uniform traffic case. But the savings were not high enough as to impact on results of the uniform traffic case. These results can aid network operators in the design and optimization of optical WDM networks.read more
Citations
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Journal ArticleDOI
A Cognitive Quality of Transmission Estimator for Core Optical Networks
Tamara Jiménez,Juan Carlos Aguado,I. de Miguel,Ramón J. Durán,M. Angelou,Noemí Merayo,Patricia Fernández,Rubén M. Lorenzo,Ioannis Tomkos,Evaristo J. Abril +9 more
TL;DR: A cognitive Quality of Transmission estimator for classifying lightpaths into high or low quality categories in impairment-aware wavelength-routed optical networks is proposed, based on Case-Based Reasoning, an artificial intelligence technique which solves new problems by exploiting previous experiences.
Journal ArticleDOI
All-optical wavelength conversion of a 100-Gb/s polarization-multiplexed signal.
Paolo Martelli,Pierpaolo Boffi,Maddalena Ferrario,Lucia Marazzi,Paola Parolari,R. Siano,Vincenzo Pusino,Paolo Minzioni,Ilaria Cristiani,Carsten Langrock,Martin M. Fejer,Mario Martinelli,Vittorio Degiorgio +12 more
TL;DR: This is the first demonstration, to the best of the knowledge, of the possibility to obtain penalty-free all-optical wavelength conversion in a 100-Gb/s POLMUX transmission system using direct-detection.
Proceedings ArticleDOI
Optimization of the knowledge base of a cognitive quality of transmission estimator for core optical networks
Tamara Jiménez,Juan Carlos Aguado,Ignacio de Miguel,Ramón J. Durán,D. Sanchez,M. Angelou,Noemí Merayo,Patricia Fernández,Natalia Fernandez,Rubén M. Lorenzo,Ioannis Tomkos,Evaristo J. Abril +11 more
TL;DR: A cognitive Quality of Transmission estimator for classifying lightpaths into high or low quality categories in impairment-aware wavelength-routed optical networks is proposed, based on Case-Based Reasoning, an artificial intelligence technique which solves new problems by exploiting previous experiences.
Journal ArticleDOI
Performance Analysis of Circuit Switched Multi-Service Multi-Rate Networks With Alternative Routing
TL;DR: Two approximations for the estimation of the blocking probability in a circuit-switched multiservice network with non-hierarchical alternative routing and trunk reservation are developed and it is demonstrated that they can be applied in large networks such as the CORONET.
Journal ArticleDOI
On the Cascadability of All-Optical Wavelength Converter for High-Order QAM Formats
Hung Nguyen Tan,Takashi Inoue,Karen Solis-Trapala,Stephane Petit,Yoichi Oikawa,Kazuya Ota,Shigehiro Takasaka,Takeshi Yagi,Mark Pelusi,Shu Namiki +9 more
TL;DR: This paper reviews a recent development of an all-optical wavelength converter, which exhibits seamless conversion in the C-band with a low noise figure of 6.2 dB for dual-polarization (DP) phase-modulated signals and investigates the cascaded operation of the developed wavelength converter for high-order quadrature amplitude modulation (QAM) formats.
References
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