Vehicle to Everything (V2X) communication is a technology that provides connectivity between vehicles, pedestrians, and road infrastructure. Dedicated Short-Range Communication (DSRC) is proposed by different standards such as ETSI, IEEE, and others since ten years ago to provide wireless connectivity in V2X. Recently, the LTE-V2X based cellular communication is standardized by the 3rd Generation Partner Project (3GPP) Release 14 as an alternative V2X technology to support autonomous driving. 5G-NewRadio (5G-NR) is being proposed by the 3GPP Release 16 as a new radio access technology to offer enhanced radio coverage and wide ultra-high reliability services. 3GPP Release15 was published in 2018 to include Phase 1 5G-NR standard. 3GPP Release 16 is designed to provide the 5G phase 2 and scheduled for being delivered in June 2020. In this paper, we study V2X based DSRC and LTE-V2X standards and introduce the current 5G-V2X standards progress. We present the 5G-V2X architecture design, core elements, challenges, essential requirements, security enhancement, and radio techniques. Also, we consider the security aspects of architecture and issues of 5G-V2X.

车辆到万物（V2X）通信是一项在车辆，行人和道路基础设施之间提供连接的技术。自十年前以来，诸如ETSI，IEEE等不同标准提出了专用短距离通信（DSRC），以在V2X中提供无线连接。最近，第三代合作伙伴计划（3GPP）版本14将基于LTE-V2X的蜂窝通信标准化，作为支持自动驾驶的替代V2X技术。3GPP版本16将5G-NewRadio（5G-NR）提议为一种新的无线电接入技术，以提供增强的无线电覆盖范围和广泛的超高可靠性服务。3GPP Release15已于2018年发布，其中包括第1阶段5G-NR标准。3GPP第16版旨在提供5G第2阶段，并计划于2020年6月交付。在本文中，我们研究基于V2X的DSRC和LTE-V2X标准，并介绍当前5G-V2X标准的进展。我们介绍5G-V2X架构设计，核心要素，挑战，基本要求，安全性增强和无线电技术。另外，我们考虑架构的安全性和5G-V2X的问题。