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This paper presents OpenCV2X, the first publicly available, open-sourcesimulation model of the Third Generation Partnership Project (3GPP) Release 14Cellular Vehicle to Everything (C-V2X) sidelink, which forms the basis for 5GNR Mode 2 under later releases. This model is fully compliant with the existingvehicular service and application layers, including messaging sets as definedby the automotive and standards communities providing a fully standardised,cross-layer communication model. Using this model, we show how the currentsidelink scheduling mechanism performs poorly when scheduling applications withhighly aperiodic communication characteristics, such as ETSI CooperativeAwareness Messages (CAMs). We then provide the first indepth evaluation ofdedicated per-packet aperiodic scheduling mechanisms, in contrast to schemesthat parameterise the existing algorithm. This paper highlights that the levelof aperiodicity exhibited by the application model greatly impacts schedulingperformance. Finally, we analyse how such scheduling mechanisms might co-exist.

OpenCV2X: Modelling of the V2X Cellular Sidelink and Performance Evaluation for Aperiodic Traffic