Elastic Optical Networks
Architectures, Technologies, and Control
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Open AccessA Literature Review and Critical Analysis of Metaheuristics Recently Developed
Metaheuristic algorithms have applicability in various fields where it is necessary to solve optimization problems. It has been a common practice in this field for several years to propose new algorithms that ...
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Optimal design of the seismic retrofitting of reinforced concrete framed structures using BRBs
This paper studies the optimization process through the metaheuristic algorithm known as Simulated Annealing (SA) applied to a dissipative system formed by Buckling-Restrained Braces (BRBs) to improve the seis...
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Predictive autonomic transmission for low-cost low-margin metro optical networks
Low-cost low-margin implementation plays an essential role in upgrading optical metro networks required for future 5G ecosystem. In this regard, low-resolution analog-to-digital converters can be used in coher...
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Real-time optical spectrum monitoring in filterless optical metro networks
Filterless optical networks (FONs) have been proposed as a feasible solution for optical metro networks. In addition, as a result of the shorter distance compared to core optical networks, direct detection opt...
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A control and management architecture supporting autonomic NFV services
The proposed control, orchestration and management (COM) architecture is presented from a high-level point of view; it enables the dynamic provisioning of services such as network data connectivity or generic ...
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Book
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Chapter
Motivation
It is widely acknowledged by operators and market analysts from all parts of the telecommunication industry, bandwidth demand is increasing dramatically, year on year, with typical growth figures of up to 30 %...
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Taking Advantage of Elastic Optical Networks
This chapter shows how the new paradigm of Elastic Optical Networks (EON) is changing the way we perceive networking. The mode of operation of EON is described and the potential gains are outlined, followed by...
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In-Operation Network Planning
Current transport networks are statically configured and managed, because they experience a rather limited traffic dynamicity. As a result, long planning cycles are used to upgrade the network and prepare it f...
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Routing and Spectrum Allocation
To properly analyze, design, plan, and operate flex-grid networks, the routing and spectrum allocation (RSA) problem must be considered. The RSA problem involves two basic constraints: the continuity constrain...
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Orchestrating connectivity services to support elastic operations in datacenter federations
Datacenter federations are able to manage appropriately the green energy resources available in each datacenter (DC) thanks to their geographically distributed infrastructure, thus reducing energy expenditure....
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Active PCE demonstration performing elastic operations and hitless defragmentation in flexible grid optical networks
Control and data plane innovations are driving the evolution of flexible grid optical networks enabling more granular reservation of spectrum portion. On the one hand, the path computation element (PCE) is evo...
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On the benefits of multi-path recovery in flexgrid optical networks
We propose a new recovery scheme, called multi-path recovery (MPR), specifically designed for flexgrid-based optical networks. It combines protection and restoration schemes to jointly recover, in part or tota...
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Article
Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited]
Sliceable bandwidth-variable transponders (SBVTs) enable the adaptation of transmission parameters according to traffic requirements and network constraints. In this study, SBVTs capabilities are evaluated in ...
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Experimental assessment of in-operation spectrum defragmentation
Dynamic operation of flexgrid networks might cause optical spectrum to be divided into fragments, which makes it difficult finding contiguous spectrum of the required width for incoming connection requests, le...
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Column generation algorithm for RSA problems in flexgrid optical networks
Finding optimal routes and spectrum allocation in flexgrid optical networks, known as the RSA problem, is an important design problem in transport communication networks. The problem is
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Value optimization of survivable multilayer IP/MPLS-over-WSON networks
Network operators are willing to provide a range of services in the hope of maximizing their profits: from the highly available connectivity services for key business customers to the unprotected or even best ...
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Enhanced domain disjoint backward recursive TE path computation for PCE-based multi-domain networks
The ability of computing optimal routes poses new challenges when extending it to larger multi-domain network scenarios, as the quality of these computed end-to-end inter-domain routes depends on the selection...
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Field evaluation of treatments for the control of the bacterial apical necrosis of mango (Mangifera indica) caused by Pseudomonas syringae pv. syringae
Bacterial apical necrosis is a critical disease in the main production area of mango in Europe. It is caused by Pseudomonas syringae pv. syringae, and produces necrotic lesions on mango buds and leaves, causing s...
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Article
Characterization and X-ray crystal structure of butanoylsalophencobalt(III)
The synthesis and characterization of the pentacoordinated butanoylsalophencobalt(III) compound, including X-ray analysis, are described. The chemical shift in the 13C-n.m.r. of the carbonyl carbon was determined...
