Extended communication interface for remote vehicle diagnosis using Internet Protocol

Nowadays, vehicles have a lot of Electronic Control Unit (ECU). In order to check ECU software reprogramming and ECU assembly line inspection, international standards are developed. Among the standards the Diagnostic Communication over Internet Protocol (DoIP) is a typical protocol for remote diagnostic of vehicles which consists of International Standard Organization (ISO) 13400 parts. The DoIP just consider in-vehicle scenario where the communication range is a Local Area Network (LAN). In this paper, we propose a new communication interface extends the communication range to Wide Area Network (WAN) to implement remote vehicle diagnosis. The simulation results show that the CPU Utilization Threshold Area (CUTA) is between -20.70266 and 20.70266 which implies remote vehicle diagnosis is possible from the long distance site.