I. Introduction
With the development of industrial Internet of things (IoT), modern vehicles have generated a series of emerging vehicular applications. The popularity of next-generation wireless communication technologies enables efficient information sharing between vehicles and everything (V2X) [1]. By the technology of V2X communication, the tasks of VUs can be migrated to other devices with sufficient computation resource [2]. It can effectively alleviate the situation of insufficient computation resources of vehicle local computing unit (VLCU) [3]. Vehicular edge computing (VEC) [4] migrates the tasks of VUs to the edge server (ES) on the roadside. It helps to establish communication links between vehicles and ES faster [5] and reduces the propagation delay, thus providing VUs with low-latency, high-bandwidth, and high-reliability services.