A Tutorial on 5G NR V2X Communications

TL;DR

This paper provides a comprehensive tutorial on the 3GPP Release 16 5G NR V2X standard, detailing its physical layer, resource management, and key features for vehicle communication, with insights into future enhancements.

Contribution

It offers an in-depth explanation of the 5G NR V2X standard, focusing on the sidelink and key technical aspects, including system architecture and evaluation methods.

Findings

Detailed overview of 5G NR V2X physical layer and resource allocation.

Analysis of coexistence mechanisms with LTE V2X.

Discussion of potential enhancements for future releases.

Abstract

The Third Generation Partnership Project (3GPP) has recently published its Release 16 that includes the first Vehicle to-Everything (V2X) standard based on the 5G New Radio (NR) air interface. 5G NR V2X introduces advanced functionalities on top of the 5G NR air interface to support connected and automated driving use cases with stringent requirements. This paper presents an in-depth tutorial of the 3GPP Release 16 5G NR V2X standard for V2X communications, with a particular focus on the sidelink, since it is the most significant part of 5G NR V2X. The main part of the paper is an in-depth treatment of the key aspects of 5G NR V2X: the physical layer, the resource allocation, the quality of service management, the enhancements introduced to the Uu interface and the mobility management for V2N (Vehicle to Network) communications, as well as the co-existence mechanisms between 5G NR V2X and LTE V2X. We also review the use cases, the system architecture, and describe the evaluation methodology and simulation assumptions for 5G NR V2X. Finally, we provide an outlook on possible 5G NR V2X enhancements, including those identified within Release 17.