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The authors target urban scenarios where vehicular users can download large files from road-side Access Points (APs), and define a framework to exploit opportunistic encounters between mobile nodes to increase their transfer rate. They first devise a technique for APs deployment, based on vehicular traffic flows analysis, which fosters cooperative download. Then, they propose and evaluate different algorithms for carriers selection and chunk scheduling in carry & forward data transfers. Vehicular environments are one of the most promising fields of application for pervasive mobile networking. If the fast dynamics of the topology of a network built over moving vehicles make the adoption of a fully ad-hoc paradigm unfeasible, schemes relying on vehicle-to-infrastructure and opportunistic car-to-car communication appear instead viable.
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