Opportunistic Offloading with Data-driven Road Side Unit in Vehicular Delay-Tolerant Networks

Due to vehicles’ high mobility and complex wireless environment, mobile data traffic imposes a great challenge on Vehicular Delay-Tolerant Networks (VDTN). Based on high-throughput mmWave communication, the road side unit (RSU) plays an indispensable role in offloading delay-tolerant data traffic from cellular infrastructure to adjacent RSU. This paper formulates the selection of locations to deploy RSU at traffic intersections with budget constrains as an optimization problem. A data-driven RSU deployment algorithm is proposed to optimize data offloading in VDTNs. Synthetic simulation was employed to investigate the proposed scheme under real mobility traces. The results show that the proposed algorithm reduces the average service waiting time and achieves a higher RSU utilization.