Modeling blockages and link dependency in millimeter wave communication networks using Matérn Hard-Core Point Process

Abstract

With the pursuit of higher transmission rate, millimeter wave (mmWave) communication has become one of the propelling technologies in wireless communications. Due to its short wavelength, a mmWave signal suffers from significant path loss and is heavily affected by obstructions and reflections caused by blockages. Moreover, the interference links are dependent as the locations of base stations are not independent in practical deployment. And the link dependency in the densely deployed mmWave communication networks cannot be ignored, which makes coverage analysis even more complicated. In this paper, we investigate the coverage model incorporating the Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) links of both signal and interference, to comprehensively portray the performance of mmWave networks with randomly distributed blockages. Further, we capture the dependency between interfering links with the copula function to model the received aggregate interference more accurately. The probability density function of the received power, Signal-to-Interference-plus-Noise Ratio (SINR), and outage probability are characterized to theoretically quantify the impact of blockages and interference. The proposed analytical model perfectly models the impact of blockages and link dependency, and obtains the cumulative distribution function (CDF) of the SINR with a gap less than 0.2% compared to the Monte-Carlo simulation.