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Efficient radio channel modeling for urban wireless sensors networks

Abstract : Modeling the radio channel in an accurate way is a key element of any wireless systems. Deterministic models offer a good degree of precision at the cost of high computational complexity, which is prohibitive for wireless sensor network (WSN) simulators because they involve many sensor nodes in a city-wide scale. Within this context, the objective of this thesis is to propose efficient, fast, and accurate deterministic methods for modeling electromagnetic waves by finding the best time-accuracy trade-offs that guarantee accuracy under tight time constraints. The study was first subdivided into two modes according to the dominant propagation mechanism. In microcell configurations, the proposed approach is a ray-tracing model based on the visibility technique. It adopts a set of acceleration techniques to reduce the complexity with a minimal loss of precision. With the same objective, the vertical propagation was addressed to include the most significant contributions. Finally, these models were integrated into a WSN simulator to provide realistic and accurate results for smart city applications. The importance of using accurate models in WSN simulators is illustrated in terms of some network parameters.
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Taha Al-Wajeeh. Efficient radio channel modeling for urban wireless sensors networks. Electromagnetism. Université de Poitiers, 2018. English. ⟨NNT : 2018POIT2314⟩. ⟨tel-02864456⟩

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