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Advisor(s)
Abstract(s)
Existem cada vez mais serviços críticos assentes sobre ligações móveis fornecidas por operadores públicos. No entanto, estas ligações não oferecem, muitas vezes, Service Level Agreement (SLA) alinhados com a criticidade do serviço que as utiliza. O 5G veio oferecer nativamente mecanismos que permitem fornecer este tipo de garantias a um serviço e aplicação. No entanto, isto carece de negociação com o operador em causa,
com custos não negligenciáveis. Adicionalmente, em situações de falha do operador, a resiliência continua a não estar assegurada. Assim, neste trabalho pretende-se desenvolver, sobre um sistema operativo de código aberto, um sistema de comunicação (gateway) que permita o encaminhamento de flows de pacotes, com elevada resiliência e segurança, através de múltiplas ligações WAN baseadas em redes públicas móveis,
com a gateway estática ou em movimento. Identificam-se como grandes resultados para este trabalho: 1) A integração, através de um stack de software, num sistema operativo baseado em Linux, da capacidade de agregação automatizada de diferentes ligações WAN de forma transparente para as aplicações através de um canal seguro; e, 2) A avaliação da Qualidade de Serviço oferecida, para determinar quais as melhores ligações a usar utilizando para tal as Application Programming Interface (API) existentes no Kernel de um sistema operativo Linux.
The number of critical services based on mobile connections provided by public operators has been rising significantly. However, these connections often do not offer Service Level Agreements (SLAs) in line with the criticality of the service that uses them. 5G has natively offered mechanisms that allow this type of guarantee to be provided to a service and application. Nonetheless, this requires negotiation with the operator, with non-negligible costs, and in situations of operator failure, resilience is not guaranteed. Thus, the present work aims to develop a gateway based on an open-source operating system that allows packet flow forwarding, with high resilience and security, through multiple WAN connections based on public mobile networks, with a static or a moving terminal. The main goals for this work are: 1) The integration, through a software stack, in a Linux-based OS, of the automated aggregation capacity of different WAN connections transparently to the applications through a secure channel; and, 2) The evaluation of the Quality of Service offered, in order to establish the best connections using the Application Programming Interfaces (APIs) existing in the Kernel of a Linux operating system.
The number of critical services based on mobile connections provided by public operators has been rising significantly. However, these connections often do not offer Service Level Agreements (SLAs) in line with the criticality of the service that uses them. 5G has natively offered mechanisms that allow this type of guarantee to be provided to a service and application. Nonetheless, this requires negotiation with the operator, with non-negligible costs, and in situations of operator failure, resilience is not guaranteed. Thus, the present work aims to develop a gateway based on an open-source operating system that allows packet flow forwarding, with high resilience and security, through multiple WAN connections based on public mobile networks, with a static or a moving terminal. The main goals for this work are: 1) The integration, through a software stack, in a Linux-based OS, of the automated aggregation capacity of different WAN connections transparently to the applications through a secure channel; and, 2) The evaluation of the Quality of Service offered, in order to establish the best connections using the Application Programming Interfaces (APIs) existing in the Kernel of a Linux operating system.
Description
Dissertação para obtenção do Grau de Mestre em Engenharia Informática e de Computadores
Keywords
Resiliência Serviços críticos Virtual Private Network Redes móveis Multipath Encaminhamento dinâmico Avaliação ativa Avaliação passiva Resilience Critical services Mobile networks Dynamic routing Active measurements Passive measurements
Citation
RODRIGUES, Carlos Eduardo Governo – Sistema de encaminhamento resiliente para serviços críticos sobre redes públicas móveis. Lisboa: Instituto Superior de Engenharia de Lisboa, 2022. Dissertação de Mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa