11 research outputs found

    Virtual network function development for NG-PON Access Network Architecture

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    Dissertação de mestrado em Engenharia de Redes e Serviços TelemáticosThe access to Internet services on a large scale, high throughput and low latency has grown at a very high pace over time, with a growing demand for media content and applications increasingly oriented towards data consumption. This fact about the use of data at the edge of the network requires the Central Offices (CO) of telecommunication providers, to be pre pared to absorb these demands. COs generally offer data from various access methods, such as Passive Optical Network (PON) technologies, mobile networks, copper wired and oth ers. For each of these technologies there may be different manufacturers that support only their respective hardware and software solutions, although they all share different network resources and have management, configuration and monitoring tools (Fault, Configuration, Accounting, Performance, and Security management - FCAPS) similar, but being distinct and isolated from each other, which produces huge investment in Capital Expenditure (CAPEX) and Operational Expenditure (OPEX) and can cause barriers to innovation. Such panora mas forced the development of more flexible, scalable solutions that share platforms and net work architectures that can meet this need and enable the evolution of networks. It is then proposed the architecture of Software-Defined Network (SDN) which has in its proposal to abstract the control plane from the data plane, in addition to the virtualization of several Net work Function Virtualization (NFV). The SDN architecture allows APIs and protocols such as Openflow, NETCONF / YANG, RESTCONF, gRPC and others to be used so that there is communication between the various hardware and software elements that compose the net work and consume network resources, such as services AAA, DHCP, routing, orchestration, management or various applications that may exist in this context. This work then aims at the development of a virtualized network function, namely a VNF in the context of network security to be integrated as a component of an architecture guided by the SDN paradigm applied to broadband networks, and also adherent to the architecture OB-BAA promoted by the Broadband Forum. Such OB-BAA architecture fits into the initia tive to modernize the Information Technology (IT) components of broadband networks, more specifically the Central Offices. With such development, it was intended to explore the con cepts of network security, such as the IEEE 802.1X protocol applied in NG-PON networks for authentication and authorization of new network equipment. To achieve this goal, the development of the applications was based on the Golang language combined with gRPC programmable interfaces for communication between the various elements of the architec ture. Network emulators were initially used, and then the components were ”containerized” and inserted in the Docker and Kubernetes virtualization frameworks. Finally, performance metrics were analyzed in the usage tests, namely computational resource usage metrics (CPU, memory and network I/O), in addition to the execution time of several processes performed by the developed applications.O acesso aos serviços de Internet em larga escala, alto débito e baixa latência têm crescido em um ritmo bastante elevado ao longo dos tempos, com uma demanda crescente por conteúdos de media e aplicações cada vez mais orientadas ao consumo de dados. Tal fato acerca da uti lização de dados na periferia da rede, obriga a que os Central Offices (CO) dos provedores de telecomunicações estejam preparados para absorver estas demandas. Os CO geralmente re cebem dados de diversos métodos de acesso, como tecnologias Passive Optical Network (PON), redes móveis, cabladas em cobre, entre outros. Para cada uma destas tecnologias pode haver diferentes fabricantes que suportam somente suas respetivas soluções de hardware e software, apesar de todas compartilharem diversos recursos de rede e possuírem ferramentas de gestão, configuração e monitoração (Fault-management, Configuration, Accounting, Performance e Segurança - FCAPS) similares, mas serem distintas e isoladas entre si, o que se traduz em um enorme investimento em Capital Expenditure (CAPEX) e Operational Expenditure (OPEX) e pode causar barreiras à inovação. Tais panoramas forçaram o desenvolvimento de soluções mais flexíveis, escaláveis e que compartilhem plataformas e arquiteturas de redes que pos sam suprir tal necessidade e possibilitar a evolução das redes. Propõe-se então a arquitetura de redes definidas por software (Software-Defined Network - SDN) que tem em sua proposta abstrair o plano de controle do plano de dados, além da virtualização de diversas funções de rede (Network Function Virtualization - NFV). A arquitetura SDN possibilita que API’s e pro tocolos como Openflow, NETCONF/YANG, RESTCONF, gRPC e outros, sejam utilizados para que haja comunicação entre os diversos elementos de hardware e software que estejam a compor a rede e a consumir recursos de redes, como serviços de AAA, DHCP, roteamento, orquestração, gestão ou diversas outras aplicações que possam existir neste contexto. Este trabalho visa então o desenvolvimento de uma função de rede virtualizada nomeada mente uma (Virtual Network Function - VNF) no âmbito de segurança de redes a ser integrada como um componente de uma arquitetura orientada pelo paradigma de SDN aplicado a re des de banda larga, e aderente também à arquitetura OB-BAA promovida pelo Broadband Fo rum. Tal arquitetura OB-BAA se enquadra na iniciativa de modernização dos componentes de Tecnologia da Informação (TI) das redes de banda larga, mais especificamente dos Cen tral Offices. Com tal desenvolvimento pretende-se explorar conceitos de segurança de redes, como o protocolo IEEE 802.1X aplicado em redes NG-PON para autenticação e autorização de novos equipamentos de rede. Para atingir tal objetivo, utilizou-se desenvolvimento de aplicações baseadas na linguagem Golang aliado com interfaces programáveis gRPC para comunicação entre os diversos elementos da arquitetura. Para emular tais componentes, utilizou-se inicialmente emuladores de rede, e em um segundo momento os componentes foram ”containerizados” e inseridos nos frameworks de virtualização Docker e Kubernetes.Por fim, foram analisadas métricas de desempenho nos testes executados, nomeadamente métricas de utilização de recursos computacionais (CPU, memória e tráfego de rede), além do tempo de execução de diversos processos desempenhados pelas aplicações desenvolvidas

    Unencapsulated Mobile Multicast Routing for Next Generation Video Networks

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    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

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    The full content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

    NOTIFICATION !!!

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    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

    NOTIFICATION !!!

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    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

    NOTIFICATION !!!

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    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

    NOTIFICATION !!!

    Get PDF
    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition

    NOTIFICATION !!!

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    All the content of this special edition is retrieved from the conference proceedings published by the European Scientific Institute, ESI. http://eujournal.org/index.php/esj/pages/view/books The European Scientific Journal, ESJ, after approval from the publisher re publishes the papers in a Special edition
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