HetCast: Cooperative data delivery on cellular and road side network

Growing mobile data demand is pushing the limits of cellular networks. With the rise of smart cars, vehicular users are poised to become a substantial portion of this demand. To meet rising requests, road side units (RSUs) will play a key role in offloading traffic from cellular infrastructure. In this paper, we propose a deduplication hybrid cellular and RSU based approach where a vehicle can exploit the advantages of both cellular and RSU networks. Popular data items are broadcasted from RSU networks while unpopular items can be obtained from LTE. We propose three algorithms which takes into account mobility of vehicles to create a global broadcast schedule. We compare and evaluate performance using cellular usage and download speed as metrics. We utilized TAPAS Cologne, a large scale simulated vehicular mobility dataset. We find that our proposed algorithms reduce cellular usage and improves download speed.