Smart cars are becoming the future of vehicle industry, most newly developed vehicles are equipped with communication modules that transmits and receive data for many purposes including insurance policy requirements, vehicle security, and for safety purposes. Cellular V2X requires all vehicles to have this module to transmit vehicle data and to receive feedback, so that V2X services can be implemented successfully. However, not all vehicles are equipped with such communication modules; therefore, the purpose of this paper is to design a communication module that enables all vehicles that has OBDII (On-Board Diagnostic module) standard to reliably transmit and receive related V2X data using Cellular networks, such as 3G, 4G, etc. through using affordable embedded system.

V2X (Vehicle-to-Everything) evolution over cellular networks has been an excelling topic with the advances of high throughput and low latency LTE networks, and the introduction of 5G networks. According to recent researches, obtaining acceptable End-to-End (E2E) delay has been a challenging design process since data travels through several steps from the originating source to the data center and vice versa. V2X latency comprises mainly of three levels: source processing, cellular network, and data center processing. Delay reduction can be achieved on the three levels. However, many conventional solutions have not reached the required and acceptable range of latency to enable V2X communication over cellular networks. In this paper, a general review of challenges to make V2X feasible on cellular network has been discussed, and the proposed solutions in the literature has been introduced. As a conclusion, a various types of aiding tools to design and test V2X tools are given, so that a right path should be taken to consider challenges and improving design metrics.