Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-22T15:02:52Z No. of bitstreams: 1 FelipeSampaioDantasDaSilva_DISSERT.pdf: 10625109 bytes, checksum: 24d454d6d2db17788d2d0322b151ea34 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-26T22:32:41Z (GMT) No. of bitstreams: 1 FelipeSampaioDantasDaSilva_DISSERT.pdf: 10625109 bytes, checksum: 24d454d6d2db17788d2d0322b151ea34 (MD5) / Made available in DSpace on 2016-07-26T22:32:41Z (GMT). No. of bitstreams: 1 FelipeSampaioDantasDaSilva_DISSERT.pdf: 10625109 bytes, checksum: 24d454d6d2db17788d2d0322b151ea34 (MD5) Previous issue date: 2015-12-18 / A populariza??o das redes sem fio e a crescente prolifera??o de dispositivos m?veis requerem o desenvolvimento de mecanismos de controle de mobilidade que suportem as diferentes demandas de tr?fego sob caracter?sticas de rede diversas. Um grande obst?culo no desenvolvimento deste tipo de tecnologia ? a complexidade envolvida no gerenciamento de todas as informa??es de mobilidade, principalmente quando se considera um grande n?mero de dispositivos. Al?m disso ? preciso lidar com toda a sobrecarga de sinaliza??o necess?ria para controlar estes procedimentos na rede de maneira eficiente. V?rias iniciativas propostas pela comunidade cient?fica tratam deste assunto de maneira ineficiente, apresentando solu??es que dependam da atua??o expl?cita do objeto m?vel (Moving Object - MO), respons?vel por acionar o processo de mobilidade, geralmente guiada exclusivamente por aspectos f?sicos, tais como RSS (Received Signal Strength) dos pontos de acesso (Point of Attachment - PoA) candidatos. Diante disso, este trabalho tem como objetivo conceber, avaliar e validar uma infraestrutura de comunica??o para o gerenciamento de mobilidade em sistemas WiNeMo (Wireless Networking for Moving Objects), fazendo uso da flexibilidade provida pelo paradigma das Redes Definidas por Software (Software Defined Networking - SDN), onde as fun??es de rede, incluindo o gerenciamento de mobilidade e qualidade de servi?o (Quality of Service - QoS), podem ser facilmente estendidas, tais como o software no plano de controle, sem sobrecarga computacional, e atualiza??es nos dispositivos de rede. Como principais contribui??es, destacam-se: (i) predi??o e controle de mobilidade infraestruturado; (ii) sele??o de melhor ponto de acesso e aprovisionamento de recursos com base nos requisitos de QoS das aplica??es dos objetos m?veis; (iii) balanceamento de carga por mobilidade, em casos de exaust?o de recursos no ponto de acesso pretendido; e (iv) setup de handover com base no IEEE 802.21. / The spread of wireless networks and growing proliferation of mobile devices require the development of mobility control mechanisms to support the different demands of traffic in different network conditions. A major obstacle to developing this kind of technology is the complexity involved in handling all the information about the large number of Moving Objects (MO), as well as the entire signaling overhead required to manage these procedures in the network. Despite several initiatives have been proposed by the scientific community to address this issue they have not proved to be effective since they depend on the particular request of the MO that is responsible for triggering the mobility process. Moreover, they are often only guided by wireless medium statistics, such as Received Signal Strength Indicator (RSSI) of the candidate Point of Attachment (PoA). Thus, this work seeks to develop, evaluate and validate a sophisticated communication infrastructure for Wireless Networking for Moving Objects (WiNeMO) systems by making use of the flexibility provided by the Software-Defined Networking (SDN) paradigm, where network functions are easily and efficiently deployed by integrating OpenFlow and IEEE 802.21 standards. For purposes of benchmarking, the analysis was conducted in the control and data planes aspects, which demonstrate that the proposal significantly outperforms typical IPbased SDN and QoS-enabled capabilities, by allowing the network to handle the multimedia traffic with optimal Quality of Service (QoS) transport and acceptable Quality of Experience (QoE) over time.

Made available in DSpace on 2016-04-04T18:31:36Z (GMT). No. of bitstreams: 1 Vitor Chaves de Oliveira.pdf: 1928054 bytes, checksum: 49bf6198a68438069d6ef8b9a2ec77e9 (MD5) Previous issue date: 2012-12-10 / In recent years, virtualization computing has become a worldwide reality present in datacenters servers of most organizations. The motivations for the use of this solution are focused primarily on cost reduction and increases in availability, integrity and security of data. Based on these benefits, recently it was started the use of this technology for personal computers as well. That is, for desktops, giving birth to the so-called desktop virtualization. Given the technical advantages of the approach, its growth has been so significant that, before 2014, it is expected to be present in over 90% of organizations. However, this new method is completely based on a physical client-server architecture, which increases the importance of the communication network that makes this technique possible. Therefore, analyzing the network in order to investigate the effects according to the environment implemented, becomes crucial. In this work it s varied the local s client hardware and the application, i.e. the service used. The purpose was to detail their effects on computer networks in a Quality of Service (QoS) parameter, throughput. Secondarily are outlined perceptions regarding the Quality of Experience (QoE). / Nos ?ltimos anos, a virtualiza??o computacional se tornou uma realidade nos servidores presentes nos data-centers da maioria das organiza??es no mundo. As motiva??es para o emprego desta solu??o est?o centradas, primordialmente, na redu??o de custos e em aumentos na disponibilidade, na integridade e na seguran?a dos dados. Com base nestes benef?cios, recentemente, se come?ou a aproveitar esta tecnologia tamb?m para os computadores pessoais. Isto ?, para os desktops, dando origem a chamada virtualiza??o de desktop. Dadas as vantagen t?cnicas da abordagem, seu crescimento tem sido t?o expressivo que, antes de 2014, se espera que ela esteja presente em mais de 90% das organiza??es. Todavia, este m?todo ? totalmente baseado em uma arquitetura cliente-servidor f?sica, o que aumenta a import?ncia da rede de comunica??o que torna a t?cnica poss?vel. Logo, analisar a rede, a fim de investigar os impactos de acordo com o ambiente implementado, se torna fundamental. Neste trabalho variamos o hardware local do cliente e a aplica??o, isto ?, o servi?o utilizado. A finalidade foi a de detalhar seus efeitos, em redes de computadores, em um par?metro de Qualidade de Servi?o (QoS), a vaz?o. Secundariamente s?o esbo?adas percep??es de Qualidade da Experi?ncia (QoE).