Como Melhorar a Representação de Traces: Um Estudo de Caso Usando Dados do Transporte Público
Abstract
Simulation is the most commonly used approach to evaluate protocols and algorithms for vehicular networks (VANETs). Simulation tools typically use mobility traces to recreate the network topology based on the existing contacts between the mobile nodes. However, in terms of spatial and temporal granularity, the quality of the traces is an essential factor that directly affects the network topology. Therefore, the reliability of the results depends strongly on the accurate representation of the real network topology by the mobility model. We show that a real bus mobility trace has gaps, leading to results that do not represent reality. In this work, we use a solution to fill these gaps, leading to more refined features, which lead to more reliable simulation results. Besides, we also present the evaluation results that compare the communication metrics of the original and calibrated traces. The results reveal that the gaps induce network topologies that are different from reality, reducing the quality of the evaluation results. Although mobility data for vehicle networks are constructive, they must undergo a quality improvement process.
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