Riassunto analitico
In recent years, the evolution of Advanced Driver Assistance Systems (ADAS) has progressively shifted towards connected and automated driving. Correspondingly, Vehicle-to-Everything (V2X) communication technology is stirring a great deal of interest from both telecommunications and automotive industry players, thanks to its potential for improving road safety and traffic efficiency in future Intelligent Transport Systems. For this reason, the Third Generation Partnership Project (3GPP) has introduced support to Cellular-based V2X (C-V2X) in Release 12 and Release 14 specifications, addressing basic V2X services and laying the foundation for the more advanced use cases specified in Release 15, that future 5G systems will enable.\\
The first part of this thesis provides an overview of the 3GPP 5G standard, with the description of its main features and of its improvements with respect to 4G technology. Within the second part, an analysis of the C-V2X technology evolution from Release 12 to the upcoming Release 16 is presented, focusing on its suitability for the deployment of the enhanced V2X (eV2X) services introduced in Release 15. This is followed by a critical discussion of the results obtained with the help of the ns-3 simulator, where ad-hoc modules replicating the V2V Mode 4 as specified in 3GPP Release 14 have been implemented. LTE-V2V performance (in terms of latency and communication reliability) is investigated in the presence of periodic and aperiodic traffic, in both highway and urban scenarios. Next, the link-level performance evaluation of the 5G sidelink interface (expected to be standardized within Release 16, in December 2019) is examined, obtaining up to date Block Error Rate (BLER) vs Signal-to-Interference-to-Noise Ratio (SNR) curves. These are used to analyse the 5G-V2V Mode 2a and 2c access schemes under the same simulation assumptions of LTE-V2V, therefore allowing a thorough evaluation of the major improvements introduced by the new 5G technology.
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