STM Article Repository

This manuscript aims to study the positioning requirements, build an understanding of the positioning framework for the C-V2X system, and provide specific technologies according to the requirements and environments. Cellular vehicle-to-everything (C-V2X) is critical in allowing safe, dependable, and efficient transportation services as the foundation for vehicles to communicate with each other and everything around them. Positioning is a key component of C-V2X, which involves determining the vehicle's absolute and relative positions in relation to other objects such as buildings, pedestrians, traffic signs, and other cars. This manuscript will deeply explore the feasibility of Highly Accurate positioning for the C-V2X system. In this manuscript, Key Performance Indicators (KPIs) for C-V2X positioning will be described at the beginning. Then positioning challenges and conventional positioning methods for C-V2X like GNSS/Cellular/Sensors will be reviewed. Afterward, UE-based/UE-assisted C-V2X positioning architectures, and a series of key positioning technologies such as sidelink positioning, data fusion and synchronization will be proposed. Lastly, some testing and typical application cases will be provided.