Interference model with channel shadowing and fading for device-to-device communications

Device-to-device (D2D) communications have recently been considered as a promising technology to improve the resource utilization of the cellular network and the user throughput between devices in proximity to each other. In this paper, we present an interference model with the channel shadowing and fading for D2D communications. This model assumes that the D2D user equipments (UEs) can cease their transmission within the interference region centered at the cellular UE. We investigate the impacts of interference region, channel shadowing, and small scale fading on the probability density function (PDF) of the interference power. Simulation results show that the channel shadowing and small scale fading are beneficial in terms of reducing the mean value and outage probability of the interference power, and the Gaussian approximation is no longer valid, while the log-normal distribution seems to be a better description of the interference PDF.