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The performance of vehicular Internet access using roadside 802.11-based APs has been extensively studied in the literature. However, much less attention has been dedicated to analyzing the maximum achievable throughput when multiple vehicles simultaneously share the bandwidth of the same roadside AP in a given mobility scenario. To fill such a gap, in this paper the authors develop an analytical framework to quantify the total amount of data transferred by a vehicle that drives through the coverage area of a roadside 802.11-based AP. The distinctive aspects of their analysis are the following: it considers heterogeneous vehicular environments where vehicles may have different mobility characteristics; and it accurately takes into account critical traffic parameters, such as road capacity and vehicle density, when modelling MAC-layer capacity.
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