We consider content distribution in vehicular ad hoc networks. We assume thata file is encoded using fountain code, and the encoded message is cached atinfostations. Vehicles are allowed to download data packets from infostations,which are placed along a highway. In addition, two vehicles can exchangepackets with each other when they are in proximity. As long as a vehicle hasreceived enough packets from infostations or from other vehicles, the originalfile can be recovered. In this work, we show that system throughput increaseslinearly with number of users, meaning that the system exhibits linearscalability. Furthermore, we analyze the effect of mobility on systemthroughput by considering both discrete and continuous velocity distributionsfor the vehicles. In both cases, system throughput is shown to decrease whenthe average speed of all vehicles increases. In other words, higher overallmobility reduces system throughput.
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