Uma proposta de arcabouço para tolerância a falhas multicamadas em sistemas IoT
Fault tolerance in IoT systems is challenging to overcome due to its complexity, dynamicity, and heterogeneity. IoT systems are typically designed and constructed in layers. Every layer has its requirements and fault tolerance strategies. However, errors in one layer can propagate and cause effects...
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| Formato: | doctoralThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/46635 |
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| Resumo: | Fault tolerance in IoT systems is challenging to overcome due to its complexity, dynamicity, and heterogeneity. IoT systems are typically designed and constructed in layers.
Every layer has its requirements and fault tolerance strategies. However, errors in one
layer can propagate and cause effects on others. Thus, it is impractical to consider a centralized fault tolerance approach for an entire system. Consequently, it is vital to consider
multiple layers in order to enable collaboration and information exchange when addressing fault tolerance. The purpose of this study is to propose a multi-layer fault tolerance
approach, granting interconnection among IoT system layers, allowing information exchange and collaboration in order to attain the property of dependability. In order to
attain this purpose, the pathology of failures is established, which aids in understanding
the faults and their behavior, serving as a basis for defining an event-oriented framework
called FaTEMa (Fault Tolerance Event Manager). This framework creates a dedicated
communication channel to propagate fault-related events through system levels, assisting
in error detection and service continuation. Additionally, it offers extension points to support heterogeneous communication protocols and evolve new capabilities. The empirical
evaluation results show that introducing FaTEMa provided improvements to the error detection and error resolution time, consequently improving system availability. In addition,
the use of Fatema provided a reliability improvement and a reduction in the number of
failures produced. |
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