Interference and Efficient Transmission Range via V2V Communication at Roads Traffic Intersections

TL;DR

This paper develops mathematical models to analyze interference and determine efficient transmission ranges for V2V communication at traffic intersections, considering geometric features and traffic congestion, to improve urban traffic safety and ITS applications.

Contribution

It introduces new analytical formulations for worst-case interference and transmission range at traffic intersections, incorporating intersection geometry and traffic conditions.

Findings

Accurate approximation of interference and transmission range under various traffic levels.

Smaller intersections and heavy congestion lead to higher interference and reduced transmission range.

Orthogonal intersections have critical thresholds for interference and transmission range.

Abstract

Vehicle-to-Vehicle (V2V) communication technology has dramatically promoted many promising applications to enhance traffic safety, mobility, and sustainability. However, However, we still lack the understanding of some fundamental properties of V2V technology under urban traffic conditions, such as interference at traffic intersections. Motivated by this view, this study develops the mathematical formulations to capture the worst-case interference at traffic intersections, considering the macroscopic traffic flow conditions and critical road geometric features including intersection diameter D, and intersection angle {\alpha}. Built upon these formulations, we develop a mathematical model to approximate a conservative transmission range to sustain the successful V2V transmission at a traffic intersection. Our experiments illustrate that the proposed analytical formulations can provide accurate approximations for the interference and the corresponding transmission range at orthogonal (non-orthogonal) traffic intersections under various traffic congestion levels. Furthermore, this study conducted other experiments to understand how intersection geometric features (such as (D, {\alpha})) impact V2V communication at traffic intersections. The results illustrate that severer interference and smaller transmission range occur at a smaller intersection (with smaller diameter D) under heavy traffic congestion level. And the orthogonal intersection gives critical thresholds (such as severest interference and minimum transmission range) under all different traffic conditions, which help in understanding the V2V communication performance at an urban traffic intersection. These findings will potentially help to develop efficient MAC algorithms adaptive to urban traffic conditions, and further support various ITS applications using V2V communication. interference and transmission range.