Distribution of power dividers in passive optical networks using genetic algorithms / Distribuição de divisores de potência em redes ópticas passivas utilizando algoritmos genéticos




This study, based on a genetic algorithm, optimizes the distribution of power dividers used, in the access, by passive optical networks, where each splitter has one input and several outputs. The practical scenario of distribution includes a particular city where the streets are the possible ways and the houses or buildings are the possible terminals. Starting from the OLT (Optical Line Terminal), in general the distribution center, the end users (ONUs - Optical Network Units) are connected to the OLT by a path with power divisions. Observe that we have at least one starting point (OLT) and several points of arrival (the ONUs) - depending on the amount of the optical splitter outputs, each of these representing a user. The positioning of the OLT, ONUs and power dividers are part of the solution we are seeking for and all these elements form the access passive optical network (PON). Important aspects considered: (i) the lengths of the cables from the OLT to the ONUs, once there are more signal degradation as the distance increases, (ii) link power budget and (iii) link cost. During the optimization process, the developed genetic algorithm proposes a new procedure for finding the optimum path which is called cyclic node. The obtained results have been validated by comparison with manual optimization in a smaller scale network. Graphical interfaces have been developed for uploading city maps from aplicatives Google maps.


cyclic node algoritmos genéticos redes ópticas passivas network planning otimização de topologias de rede nó cíclico passive optical networks planejamento de rede topology optimization genetic algorithm

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