A Relay Selection Scheme Based on the QoF Prediction in Heterogeneous V2V Networks

Vehicle-to-vehicle (V2V) communication can be currently supported by standards based on dedicated short-range communication (DSRC) or cellular vehicle-to-everything (C-V2X) technologies. With the rapid development of inter-vehicle communication, the communication inability issue between the vehicles using different access technologies has been raised, and most existing packet relaying mechanisms dealt with homogeneous vehicular networks. In this paper, we investigate how to select suitable vehicles with both DSRC and C-V2X units (referred to as Dual interface vehicles (DVs)) as relays with objective of continuous cooperations between vehicles in heterogeneous V2V networks. We propose a novel metric called Quality of Forwarding (QoF) and implement relay DV selection scheme based on the QoF prediction. The simulation results confirm that compared with existing relaying mechanisms, the proposed relay DV selection scheme can achieve lower broadcast latency, higher broadcast coverage, and still have a promising performance even though the number of DV is small.