Abstract
With the rapid development and popularization of 5G and C-V2X, services based on C-V2X are rapidly expanding. Specially, the positioning accuracy is the most basic requirement in V2X service. According to the different requirements for V2X use cases, the positioning accuracies are also different. So the positioning schemes are various according to the positioning requirements. This paper contains a study of requirements, architecture, key technologies and demonstrations in high accuracy positioning for V2X services. Combining the scene analysis and performance requirements, high accuracy positioning, as a key part of the whole C-V2X system, its architecture can be divided into device-centric positioning architecture and network-centric positioning architecture. In addition, we summarize the key technology for high accuracy positioning of vehicles and demonstrate the proposal through testing.
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