Year: 2026
Type: dissertation
Abstract: The 5G new radio (NR) Sidelink technology is of great importance for the implementation of advanced intelligent transport systems (ITS) and for supporting autonomous driving.However, ensuring ultra-high reliability in high-mobility and high-density environments remains an important issue.This thesis focuses on the investigation of the phenomenon of packet collisions in the context of the autonomous resource selection (Mode 2) operation of the C-V2X standard.The purpose of the work is to evaluate the impact of traffic congestion and extreme transmission conditions on communication reliability.During the experimental process, a simulation environment was developed and parameterized using the ns-3 network simulator and the specialized 5G-LENA module.Scenarios involving varying packet sizes, high highway density, and combined stress testing were examined, and the performance of the sensing-based SPS algorithm was analyzed.The results showed that while the system maintains stability under high node density, the combination of maximum distance and high data rate leads to a significant decrease in the packet delivery ratio (PDR) and an increase in the delay, mainly due to the half-duplex limitation and the hidden node problem.The work concludes that the implementation of dynamic congestion control mechanisms is essential for the viability of important road safety applications.
Author: Κολοκυθά, Ζαχαρούλα Α.
Language: Greek
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7143265605