Non-Orthogonal Multiple Access Performance for Millimeter Wave in Vehicular Communications

TL;DR

This paper analyzes millimeter wave vehicular communications at intersections using NOMA, revealing that NLOS scenarios outperform LOS, and demonstrating NOMA's significant advantages over OMA through analytical and simulation results.

Contribution

It provides the first analytical outage probability expressions for mmWave NOMA in vehicular intersections considering blockage and interference effects.

Findings

NLOS scenarios outperform LOS in outage probability.

NOMA significantly outperforms OMA in mmWave vehicular networks.

Outage probability increases as vehicles approach the intersection.

Abstract

In this paper, we study the performance of millimeter wave (mmWave) vehicular communications (VCs) using non-orthogonal multiple access scheme (NOMA) at road intersections, since there areas are more prone to accidents. We study the case when the intersection involves two perpendicular lanes, we then extend the study to an intersection with several lanes. The transmission occurs between a source, and two destinations. The transmission experiences interference originated from a set of vehicles that are distributed as a Poisson point process (PPP). Our analysis includes the effects of blockage from buildings and vehicles at intersections. Closed form outage probability expressions are obtained. We show that as the nodes reach the intersection, the outage probability increases. Counter-intuitively, we show that the non line of sigh (NLOS) scenario has a better performance than the line of sigh (LOS) scenario. Finally, we compare the performance of mmWave NOMA with OMA, and we show that NOMA offers a significant improvement over OMA mmWave vehicular networks. The analysis is verified by Monte-Carlo simulation.