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Title: An experimental investigation of flexible resource allocation with adaptable infrastructure for elastic optical networks
Author: Amaya-González, Norberto
ISNI:       0000 0004 2735 2874
Awarding Body: University of Essex
Current Institution: University of Essex
Date of Award: 2012
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Increasing levels of internet traffic are driving technological developments that will enable higher channel bitrates beyond 100 Gb/s and higher fibre transmission capacity through the use of multicore /multimode fibres. These new technologies, however, need to be translated into scalable, efficient and dynamic optical networks that provide the right amount of resources and services according to users' requirements. To this end, this thesis proposes the introduction of high levels of flexibility in the optical layer, for the allocation of network resources, i.e. space, time, frequency, as well as flexible optical nodes that support dynamic and on-demand provisioning of functionality. This thesis presents experimental demonstrations of novel optical node architectures that support elastic allocation of frequency, time and space resources. It also introduces the novel concept of Architecture on Demand whereby optical node architectures can be reconfigured on the fly according to traffic requirements. Experimental demonstrations of this concept show dynamic reconfiguration of optical node architectures and on-demand provisioning of optical layer functionality, i.e. spectrum defragmentation, sub-wavelength switching. This work is complemented with a novel theoretical formulation of flexibility, whereby several types of flexibility are defined in the context of optical nodes and networks, and a new method based on entropy maximisation is proposed to quantify it. This theory is used to demonstrate the equivalence, in terms of switching flexibility, of finer spectrum granularity and faster re configuration rate and to show that switching flexibility is closely related to bandwidth granularity. The switching flexibility of key optical node components and the switching and architectural flexibility of several elastic optical node architectures are derived from the theory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available