The fast-lane development of automotive Ethernet for autonomous drive
Oscar Aspestrand, Viktor Claeson · Chalmers Publication Library (Chalmers University of Technology) · 2018
Autonomous drive has emerged as a new field of interest in recent years.The major car manufacturers are trying to implement the technologies needed for autonomous solutions, and the concept of Automotive Ethernet is being evaluated.It is of interest to investigate the current situation of the communication technologies present in vehicles today.How does the bus technologies cope with the increasing demands on bandwidth and how compatible are the different solutions.The purpose of this thesis is to answer these questions by discussing the relevant technologies in an Automotive Ethernet implementation.Focus lie on the construction of a small scale practical model aimed at mimicking a potential scenario where an Automotive Ethernet implementation is needed, in order to evaluate how feasible the current technologies are.The communication involves a node with the operating system AUTOSAR, common in vehicles today, and another node with Linux.The results of the link evaluation were unexpectedly deficient and an investigation over the whole link was performed to localize the defective area.The implemented TCP/IP module in the AUTOSAR system displayed significant issues during large data transmissions.Small structural additions were implemented to the existing TCP/IP stack, which slightly improved the results, however the overall system remained significantly below capacity.In conclusion, the results indicate that there is still more work required for the relevant technologies before these implementations can be applied in practice.Further development suggestions are made, which imply that further research should be made on the upcoming Adaptive AUTOSAR platform as well as the Time-Sensitive Network protocol.