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‘Traffic-aware’ networking is a solution allowing the improvement of the energy efficiency of optical networks. The implementation of these networking schemes makes possible to adapt the number of fully powered systems to the amount of carried traffic. Various traffic-aware schemes are available in the literature; some acting on the optical amplifiers, others on the optoelectronic (OE) devices. In...
Dynamic bandwidth allocation in response to the bandwidth requirements of new emerging applications is an essential demand for future optical networks. Hybrid switching architectures combining the benefits of different switching technologies in a single node are key elements to support wavelength and sub-wavelength granularities. This paper proposes a novel feedback-based hybrid OBS/OCS node architecture...
Network operators are facing hard competition for opportunities in the telecommunications market, forcing network investments to be carefully evaluated before the decision-making process. A great part of core network operators' revenues comes from the provisioned connectivity services. Taking this premise as our starting point, we first examine the provisioning of differentiated services in current...
We propose a novel monitor placement algorithm that reduces significantly the number of monitors required to accurately assess the QoT of all lightpaths established in an optical network, compared to other monitor placement methods.
The efficient accommodation of sub-wavelength client flows on optical channels is a current challenge for resources use optimization in GMPLS controlled optical networks. While optical channels capacity usually exceeds 10 Gbit/s, client connections requests show finer granularity. This paper concentrates on the design and implementation of a GMPLS-controlled grooming capable transport infrastructure...
Optical channel (OCh) shared protection is considered the best scheme to implement protection in optical networks due to its high efficiency. Moreover, protection resources can be used to transport extra-traffic under normal conditions. Nevertheless, the switching time of the currently available wavelength selective switches (WSS), the key component to build reconfigurable optical nodes, prevents...
Current GMPLS standardization allows control plane deployment to be either physically or only logically separated from the data plane, describing out-of-fiber or in-fiber control plane configurations. It is widely accepted, that the out-of-fiber strategy provides enhanced flexibility, which derives from the natural separation of both planes. Nonetheless, such a configuration poses new challenges to...
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