4.7 Article

Challenges and Solutions for Cellular Based V2X Communications

Journal

IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
Volume 23, Issue 1, Pages 222-255

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/COMST.2020.3029723

Keywords

Long Term Evolution; 5G mobile communication; Synchronization; 3GPP; Resource management; Cellular networks; MIMO communication; Cellular V2X; LTE vehicular communications; 5G vehicular communications; vehicle-to-vehicle communications; V2X communication infrastructure; V2X security; V2X resource allocations

Funding

  1. National Science Foundation [EARS-1547312, EARS-1547330]

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This article surveys the existing work and challenges on LTE and 5G to support efficient V2X communications, covering motivations for cellular based V2X communications, LTE V2X architecture and scenarios, challenges in LTE for V2X communications and solutions, challenges and solutions for 5G vehicular communications, as well as open research issues and possible research directions in cellular based vehicular communications.
A wide variety of works have been conducted in vehicle-to-everything (V2X) communications to enable a variety of applications for road safety, traffic efficiency and passenger infotainment. Although dedicated short-range communications (DSRC) based V2X is already in the deployment phase, cellular based V2X is gaining more interest in academia and industry most recently. This article surveys the existing work and challenges on LTE and 5G to support efficient V2X communications. First, we present the motivations for cellular based V2X communications. Second, we summarize the LTE V2X architecture and operating scenarios being considered. Third, we discuss the challenges in existing LTE for supporting V2X communications such as physical layer structure, synchronization, multimedia broadcast multicast services (MBMS), resource allocation, security and survey the recent solutions to these challenges. We further discuss the challenges and possible solutions for 5G based vehicular communications. Finally, we discuss the open research issues and possible research directions in cellular based vehicular communications.

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