Context-based caching in ICN for mobile IoT environments

• Autor(a) principal: Leira, Luís Davide Jesus
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10773/29537
• topic: Internet of Things; New Generation Networks; Future Internet; Mobility; Information-Centric Networking; Named Data Networking; In-Network Caching

The Internet of Things (IoT) is a communication paradigm in which objects of everyday life will be able to, among others, communicate with one another, becoming an integral part of the Internet. In this context, wireless networking is expected to sustain the direct interaction between personal users’ devices and also to provide connectivity on large-scale resource-constrained devices. However, conventional networking protocols fail in large scale mobile wireless environments, such as IoT scenarios, due to node mobility, dynamic topologies, and intermittent connectivity. The Information-Centric Networking (ICN) has been considered the most promising candidate to overcome the drawbacks of host-centric architectures when applied to IoT networks. The main objective of this dissertation is to improve the network performance and the Content availability in mobile IoT environments based on the use of the ICN paradigm, which enables in-network caching and Content replication, thus facilitating the efficient and timely delivery of information. Therefore, it focuses on three primary goals: (1) the analysis of IoT environments regarding mobility aspects; (2) the design and implementation of an ICN caching proposal capable to take advantage of the context; (3) the incorporation of the previous proposal into an ICN architecture and the evaluation of the network performance. The proposal stands out for its use of a cache admission policy that uses information about the Content, the nodes, and the network to provide a more effective caching performance. The tests were conducted using three different mobility and connectivity datasets, addressing intermittent communications use cases. Based on the obtained results, it was possible to observe that the use of a cache admission policy, taking into consideration several parameters in the associated context of the Contents and nodes, provides benefits in terms of cache hits and evictions ratio, and request satisfaction ratio in mobile IoT environments.