Spectrum and Power Allocation for Vehicular Networks with Diverse Latency Requirements

Vehicular communications, as a key application in five-generation (5G) systems, enable the road traffic to be safer and the road services to be more convenient. Known as vehicle-to-everything (V2X) communications, vehicular communications have differentiated quality of service (QoS) requirements for different kinds of connections. Particularly, vehicle-to-vehicle (V2V) links usually exchange various types of safety-critical information, which may have diverse latency requirements. In this paper, we consider multi-priority queues to ensure strict latency guarantee for the V2V links, which prioritizes different packets for different services. We perform spectrum and power allocation to maximize the ergodic capacity of vehicle-to-network (V2N) links while guaranteeing the V2V links' latency requirements corresponding to different priority classes. The simulation results demonstrate the validity of the proposed algorithm.