A Cluster-Based Broadcast Scheduling Scheme for mmWave Vehicular Communication

The development of mmWave vehicular communication helps many use cases of interest requiring higher throughput. However, the high attenuation of mmWave makes it essential to avoid the block of other vehicles and weaken the interference on concurrent mmWave links. In this letter, we first propose a hierarchical multi-hop clustering algorithm considering velocity, relative position, and the proportion of line-of-sight (LOS) neighbors to maintain the stability of the cluster head. Then, we propose a link availability prediction strategy to ensure that the mmWave links among vehicles are LOS as far as possible. Finally, we propose a broadcast scheduling scheme based on the cluster utilizing exclusive region to improve concurrency of mmWave links. The simulation results reflect that our scheme achieves higher throughput and average packets' delivery ratio for a varying number of vehicles and bandwidths of sub-6 GHz.