Semantic-based discovery and integration of heterogeneous things in a Smart City environment

Abstract : A Smart City can be seen as a complex system in which different actors -such as people, governance, environment, living, mobility, and economy- cooperate in order to improve, the urban area, making it efficient and sustainable. To achieve this goal, the Information and Communication Technologies (ICT), and especially the prominent Internet of Things (IoT), are called to play a key role for implementing innovative solutions, services, and applications. However, looking at the current status, the realization of the Smart City is still far from being realized; the real scenario is indeed characterized with a high level of fragmentation due to the plethora of technologies and devices present in a city. In order to bridge this gap, in this thesis, the evolution of the Internet of Things -by using Semantic interoperability and Cloud computing- towards the Cloud of Things (CoT) is demonstrated. The CoT enables the horizontal integration of various (vertical) IoT platforms and applications, making therefore, feasible the realization of the Smart City vision. To demonstrate this concept, the VITAL operating system is introduced. Within the CoT, and in general in the Smart City context, one of the most important challenges is the discovery of appropriate data-sources that satisfy user requirements. The discovery is an operation that can be performed directly in-network (i.e., the detection of neighbors) and/or out-network (i.e., a middleware that aims to discover resources that belong to different networks). In this thesis, both processes are discussed by introducing two different solutions: the VITAL Internet Connected Objects & Services Discovery, which offers out-network functionality and CACHACA, a ranking mechanism for Sensor Networks that deals with in-network tasks. Going deeply towards an horizontal unification of different data-sources and the need to have processing capabilities closer to the network, in the last part of the dissertation, the design of a gateway for the Cloud of Things is introduced. This gateway is capable to discover and manage different semantic-like things and, on the other hand, to act as end-point for the presentation of data to users, bridging the contributions of this thesis. Moreover, thanks to the use of virtualized software, the gateway enables a lightweight and dense deployment of services.
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Contributor : Riccardo Petrolo <>
Submitted on : Monday, December 19, 2016 - 5:04:47 PM
Last modification on : Thursday, December 22, 2016 - 10:34:18 AM


  • HAL Id : tel-01403844, version 2



Riccardo Petrolo. Semantic-based discovery and integration of heterogeneous things in a Smart City environment. Networking and Internet Architecture [cs.NI]. University of Lille 1, 2016. English. ⟨tel-01403844v2⟩



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