Overview of Diagnostic over IP (DOIP), Ethernet Technology and Lightweight TCP/IP for Embedded System

Abstract

The new generation vehicle will provide connectivity and telematics services for enabling vehicle communication. The diagnostic over IP in TCP/IP means enables a connection between diagnostic tool and in-vehicle nodes using IP protocols. In vehicle diagnostics, the diagnostic tools and vehicles are separated by an internetwork. The DoIP (Diagnostic over IP) standard is used to develop a prototype for vehicle diagnostics. The main aim of using IP into the family of automotive diagnostic protocol is that the development of new in-vehicle network has led to the need for communication between external test equipment and onboard ECUs using many data link layer technologies. Ethernet technology will provide high speed data transmission. DoIP is a protocol mainly used for communication between off-board and on-board dignostic system. This will improve the opportunities of interconnecting in-vehicle networks with internet for many new applications, including online, remote automotive diagnostics. Due to the limited resource availability in embedded devices, lightweight TCP/IP implementation is adopted. AutoSAR (Automotive Open System Architecture) is the layered software architecture developed for implementing communication between ECUs (electronic control units) in vehicle and the diagnostic tools outside.