Adaptive Service Time Control in Wireless Access for Vehicular Environment

The implementation of a smart transportation infrastructure is of paramount importance to establish a safe and secure transportation system. An imperative component of this system is a reliable, secure and delay-sensitive wireless communication protocol that allows the exchange of data between vehicles and the neighbouring infrastructure in an efficient way. In this paper, we propose an Adaptive Service Time Control (ASTC) scheme in Vehicle to Infrastructure (V2I) network. ASTC aims to adaptively compensate the additional delay introduced in the Road Side Unit (RSU) queue, by changing the size of the buffer at the vehicle MAC layer. In our proposed scheme, we rely on an enhanced IEEE 802.11p-based protocol, we consider an unsaturated traffic condition and we take into account the security-related processing overhead. ASTC demonstrates higher average throughput and lower average end-to-end delay compared to the conventional IEEE 802.11p protocol.