A Critical Assessment of C-V2X Resource Allocation Scheme for Platooning Applications
Michele Segata, Piermaria Arvani, Renato Lo Cigno
Abstract
V2X stands for vehicular to everything communications, but its definition is so vast that it does not even encompass a specific transmission technology. Up to a few years ago the only standardized technology for V2X was 802.11p and the protocol suites built on top of it like DSRC and ITS-GS. In recent years, however, Cellular-V2x defined both for LTE and for the upcoming 5G New Radio interfaces is drawing a lot of attention and seems to have a broad support. C-V2X standardization however, has been slow, but most of all lacks the elegant simplicity of 802.11p, so that performance analysis of automotive applications on top of C-V2X are still limited. This work presents initial results for platooning applications, highlighting the presence of severe impairments in the resource allocation schemes of C-V2X Out of Coverage modes that, if not corrected in future releases of the standards may hamper the development of this promising technology.