Performance Analysis of Uplink mmWave Communications in C-V2X Networks

In this paper, we study millimeter wave (mmWave) communications of an uplink cellular vehicle-to-everything (C-V2X) network consisting of vehicles, pedestrians, road side units (RSUs), and cellular base stations (BSs). We propose an association scheme that a vehicle delivers messages to either the V2X nodes, including vehicles, pedestrians, and RSUs, or the BSs, based on the distance and the bias factor. Subsequently, we provide a tractable analytical framework to comprehensively assess the reliability performance of the considered uplink transmission, in terms of success probability. By leveraging the stochastic geometry theory, we model the locations of vehicles, pedestrians, and RSUs as independent cox process and model the locations of BSs as a Poisson point process (PPP), and derive new expressions for the association probability, the success probability of different associating types, and the overall success probability of the C-V2X network. Numerical results are presented to validate the theoretical analyses and provide interesting insights into how the success probability is influenced by various parameters, including the signal-to-interference-plus-noise ratio (SINR) threshold, the densities of V2X nodes and BSs, the blockage density, and the bias factor.