A systematic literature review of vehicular connectivity and V2X communications: Technical aspects and new challenges

Vehicular connectivity is a significant key contribution in vehicular ad-hoc networks (VANETs). The inherent high dynamicity of vehicles is a serious challenge that affects automotive connectivity and disrupts inter-vehicle communications stability. Vehicle-to-everything (V2X) communication enables vehicles to connect to any other networks and facilitates the evolutionary trend of automotive innovations toward autonomous internet-enabled intelligent vehicles. In this article, we provide a systematic literature review (SLR) for vehicular connectivity and V2X communications by investigating 58 research articles from 2018 to 2023 in VANETs. We propose six fundamental research questions (RQs) and a taxonomy to systematize the study of the baseline articles and answer the crucial RQs. This SLR can be helpful for researchers as a complete study focusing on V2X analysis, making it possible to achieve Technical Aspects and New challenges. In this paper, we present a systematic literature review (SLR) by investing 58 research articles from 2018 to 2023 in VANET and investigating the selected articles through the proposed taxonomy. We compare vehicular connectivity analysis levels and summarize the diverse range of practical directions, vehicular communication types, connectivity scenarios, and performance evaluation metrics. This SLR can be helpful for researchers as a complete reference with a focus on connectivity analysis making possible the aforementioned applications as well as vehicular fog services, intelligent transportation systems, and the Internet of vehicles. image