# Performance Analysis of Urban Mmwave Multi-hop V2V Communications with Shifted-Exponential Distribution Headway

## TL;DR

This paper analyzes the delay and reliability of urban mmwave multi-hop V2V communications for autonomous vehicles, considering realistic vehicle headway distributions and environmental factors to improve URLLC performance.

## Contribution

It introduces a shifted-exponential distribution model for vehicle headways in urban environments and evaluates its impact on message delay and reliability in mmwave V2V networks.

## Key findings

- Delay and reliability decrease with higher path loss exponent.
- Minimum safe distance influences communication performance.
- Urban environment factors significantly affect V2V communication quality.

## Abstract

With the emergence of autonomous driving and 5G mobile communication systems, how to design vehicular networks to meet the requirements of ultra-reliable low-latency communication (URLLC) between autonomous vehicles is widely concerned by the academia and industry. In this paper, message transmission delay and reliability between autonomous vehicles based on millimeter wave (mmwave) multi-hop V2V communications under urban road environment are investigated. Considering the fact that vehicles cannot come arbitrarily close to each other, shifted-exponential distribution is proposed to model the headway distance (the distance between the head of a vehicle and the head of its follower). Simulation results show that message transmission delay and reliability decrease with the increase of the path loss exponent and are also affected by the minimum safe distance between adjacent vehicles.