Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/17212
Title: Software defined access networks
Other Titles: Redes de acesso definidas por software
Author: Maricato, José Miguel Duarte
Advisor: Teixeira, António Luís Jesus
Lima, Mário José Neves de
Keywords: Engenharia electrónica
Redes ópticas passivas
Redes de banda larga
Defense Date: 2016
Publisher: Universidade de Aveiro
Abstract: With the increase of internet usage and the exponential growth of bandwidth consumption due to the increasing number of users of new generation equipments and the creation of new services that consume increasingly higher bandwidths, it's necessary to nd solutions to meet these new requirements. Passive optical networks (PONs) promise to solve these problems by providing a better service to users and providers. PON networks are very attractive since they don't depend on active elements between their end points, leading to lower maintenance costs and better operational e ciency. PON technologies addressed in this dissertation are the G-PON (Gigabit PON), currently standardized and implemented in access networks across the world, and the NG-PON2 (Next-Generation PON 2), which is the next step on access networks evolution and is currently on the process of study and standardization. The NG-PON2 must co-exist on the same optical distribution network of the G-PON, so it re-utilizes the already built infrastructures and consequently protect providers initial investment. Software De ned Networks (SDN) is an emerging architecture that decouples network control and forwarding functions from the hardware they belong, making possible for network control to be programmable, enabling the implementation of solutions capable of solving the increasing complexity of the networks problem and the creation of innovative services. The study main focus is the SDN as an enabling mechanism for network elements virtualization. In this dissertation is studied the G-PON and NG-PON2 architectures in the context of the ITU-T G.984.x and G.989.x recommendations respectively, and the study of the SDN technology through documentation available online. And based on the studies made it's going to be proposed a server architecture that enables the control of G-PON and NG-PON2 infrastructure elements, introducing virtualization SDN concepts on access networks.
Com o crescimento da utiliza c~ao da Internet e o consumo de largura de banda a crescer exponencialmente devido ao crescente n umero de utilizadores de equipamentos de nova gera c~ao e a cria c~ao de novos servi cos que consomem cada vez maiores larguras de banda, e necess ario encontrar solu c~oes para satisfazer estes novos requisitos. As redes opticas passivas (PON) prometem solucionar esses problemas, oferecendo um melhor servi co aos utilizadores e provedores. As redes PON s~ao muito atrativas pois n~ao dependem de elementos ativos entre os seus pontos terminais, resultando em baixos custos de manuten c~ao e uma maior e ci^encia de opera c~oes. As tecnologias PON abordadas nesta disserta c~ao s~ao o G-PON (Gigabit PON), actualmente padronizada e implementada nas redes de accesso pelo mundo, e o NG-PON2 (Next-Generation PON 2), que ser a o pr oximo passo na evolu c~ao das redes de acesso e que atualmente se encontra em processo de estudo e padroniza c~ao. O NG-PON2 deve co-existir na mesma rede de distribui c~ao otica do G-PON, de forma a re-utilizar as infrastruturas j a construidas e consequentemente proteger o investimento inicial dos provedores. As redes de nidas por software (SDN) e uma arquitetura emergente que desassocia o controlo da rede e fun c~oes de encaminhamento do hardware a que pertencem, possibilitando a que o controlo da rede seja program avel, permitindo a implementa c~ao de solu c~oes capazes de resolver o problema do aumento da complexidade das redes e cria c~ao de servi cos inovadores. O principal foco de estudo ser a nas SDN como mecanismo de virtualiza c~ao dos elementos da rede. Nesta disserta c~ao e estudado as arquiteturas do G-PON e NG-PON2 no contexto das recomenda c~oes do ITU-T G.984.x e G.989.x respetivamente, e o estudo da tecnologia SDN atrav es da documenta c~ao dispon vel online. Com base nos estudos efetuados ir a ser sugerido uma arquitetura de um servidor que permite o controlo de elementos da infrastrutura G-PON e NG-PON2, intoduzindo os conceitos das SDN e virtualiza c~ao na rede de acesso.
Description: Mestrado em Engenharia Electr onica e Telecomunica c~oes
URI: http://hdl.handle.net/10773/17212
Appears in Collections:DETI - Dissertações de mestrado
UA - Dissertações de mestrado

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