Security-Aware Resource Sharing for D2D Enabled Multiplatooning Vehicular Communications

Vehicular platooning communication has been widely recognized as a promising traffic management technique for connected vehicles to improve the traffic capacity, on-road safety, and energy efficiency, etc. However, due to the high mobility and dense vehicular communication scenario, how to improve the radio resource efficiency of vehicular platooning communications is a challenge issue. In addition, considering the broadcast nature of vehicular communications, vulnerable vehicular platooning communications could be exposed to potential eavesdroppers, which would be a hidden danger for connected vehicle applications. In this paper, we investigate the secure radio resource sharing problem in device-to-device (D2D) enabled multiplatooning vehicular communications. Based on the physical layer security theory, we propose a security aware joint channel and power allocation (SA-JCPA) scheme, in which the closed-form expression for power control is derived through an algebraic method and the channel sharing strategy is obtained by leveraging a maximum weight bipartite graph matching approach. Through extensive simulations, it is demonstrated that our proposed SA- JCPA scheme can achieve efficient and secure radio resource utilization.