As the approach of fifth-generation (5G) era, the auto industry has received good development opportunities, which is one of the industry that has benefited most from 5G. Based on the powerful communication of 5G NR, all the information of vehicle running performance can be uploaded to the cloud. With the help of cloud computing, multiple internet of vehicles (IoV) applications come into existence. In this paper, the performance verification methods for typical IoV applications will be introduced in more details. Under each application scenario, we first determine a suitable traffic model, and further analyze how some key performance indicators (KPI) vary as the number of vehicles increases.