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Capacity of Infrastructure-Based Cooperative Vehicular Networks

In this paper, we propose a cooperative communication strategy that explores the combined use of vehicle-to- infrastructure (V2I) communications, vehicle-to-vehicle (V2V) communications, mobility of vehicles and cooperation among vehicles and infrastructure to improve the achievable capacity of vehicular network. An analytical framework is developed to model the data dissemination process using this strategy, and a closed form expression of the achievable capacity is obtained, which reveals the relationship between the achievable capacity and its major performance- impacting parameters such as inter-infrastructure distance, radio ranges of infrastructure and vehicles, sensing range of vehicles, transmission rates of V2I and V2V communications, vehicular density and the proportion of vehicles with download requests. Numerical result shows that the proposed cooperative communication strategy significantly increases the capacity of vehicular networks, especially when the proportion of vehicles with download request is low. Our results provide guidance on the optimum deployment of vehicular network infrastructure and the design of cooperative communication strategy to maximize the capacity.