Student: GLEYSE KELLY DA SILVA

Title: PROJETO ENERGETICAMENTE EFICIENTE DE REDES ÓPTICAS OTN

Supervisor: PROF. DR. CARMELO JOSÉ ALBANEZ BASTOS FILHO

External Examiner: PROF. DR. LUIZ HENRIQUE BONANI DO NASCIMENTO

Internal Examiner: PROFA. DRA. VERUSCA SEVERO DE LIMA

Date: October 11th, 2023

Time: 08:00

Place: Online 

Abstract: 

With the evolution of communication networks and a growing demand for Internet services, there is a need for suitable infrastructure capable of providing higher transfer rates. An important consideration is the necessity to ensure the network’s survivability, especially since it is used for handling large volumes of traffic. The main goal of this thesis is to bring improvements to a resilient Optical Transport Network (OTN) design over Dense Wavelength Division Multiplexing (DWDM), considering multiple objectives. These objectives include cost minimization by reducing the number of interfaces, which is one of the most expensive components in an OTN network planning. Additionally, the thesis aims to minimize Failure Restoration Rate and energy consumption. This is crucial, particularly in telecommunications environments where data traffic is constantly increasing, and operators seek to optimize their resources. Consequently, we compare the performance of four multi-objective algorithms in the design of resilient OTN networks over DWDM, considering two different network topologies. One topology consists of four nodes and seven link bundles, while the other comprises 16 nodes and 32 link bundles. We observed that the OMOPSO and SMPSO algorithms yielded better results in terms of Hypervolume, converging first for topology 1. For topology 2, the HYPE algorithm pro- duced more satisfactory results, demonstrating that it is possible to minimize objectives through effective planning and efficient algorithms.

Keywords: Optical Networks; OTN/DWDM; Planning; Multiobjective Algorithms; Resilient; Energy Consumption.

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