Required-Data-Rate-Based Distributed Resource Allocation Scheme for MmWave V2V with Relay

Millimeter-wave (mmWave) vehicle-to-vehicle (V2V) with relays has been regarded as a key technology to compensate for the restriction of sensors and improve the level of autonomous vehicles. However, under mmWave V2V with relays, interference will occur when the bandwidth is reused. This interference will seriously reduce the quality and scalability of mmWave V2V with relays. Besides, the connectivity structure of mmWave V2V topology varies rapidly due to the highly mobile vehicles, which requires a fast resource control mechanism. To cope with these limitations, a distributed and scalable radio resource management scheme is proposed for mmWave V2V with relays in this paper. This scheme integrates radio resource management into spatial, frequency, and power domains. In spatial domain, ZigZag antenna configuration is utilized to mitigate the interference, which plays a decisive role in the short inter-vehicle distance. In frequency and power domains, two resource blocks are allocated alternately and transmit power is controlled to suppress the interference, which has a decisive impact in the long inter-vehicle distance. Simulation results reveal that the achievable end-to-end (E2E) throughput maintains always higher than the required data rate for all vehicles. Most importantly, it works effectively in scalable mmWave V2V topology.