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We measured synchronization performance of FlexRay for OSEKtime and described why we must consider synchronization performance. Previous studies present scheduling methods for time-triggered systems when ideal constraints WCET(Worst Case Execution Time), deadline, resource dependency, etc.) are given. However, there are some differences between real distributed systems and ideal constraints. Because the scheduling method of OSEKtime is based on a clock that is synchronized via a communication protocol such as CAN (controller area network) and FlexRay, synchronization performance influences the scheduling result. Therefore, we measured the synchronization performance of FlexRay and described why we must consider synchronization performance for OSEKtime scheduling.

Control system embedded software is steadily increasing in size and sophistication, because of the complexity of the hardware and environmental interfaces associated with it. Control algorithms are now more complex and require more time and cost to implement that real control systems. This paper presents a method of developing electronic control units (ECUs) based on OSEK/VDX using model-based design and an embedded system platform. We develop a platform for ECUs in a vehicle as a real-target system which plays the role of a universal ECU. The model-based design is achieved by Matlab/Simulink. Using this method, it is possible to quickly implement embedded software including complex control algorithms without the time and cost burden associated with understanding hardware and software engineering.

As the number of electronic control units (ECUs) in vehicles increases, ECUs can create a large and complicated in-vehicle network. Therefore, in-vehicle networks need a network management algorithm for improved reliability. The Open System and Corresponding Interfaces for Automotive Electronics/Vehicle Distributed Executive (OSEK/VDX) set a goal of being the industry standard for real-time operating systems used in vehicle systems. OSEK/VDX includes a reliable network management algorithm, OSEK Network Management (OSEK NM). It has two types of management mechanisms: Direct NM, and Indirect NM. These have opposite characteristics and different management performance. This paper explains the effective factor of network management performance, and proves it using a real application experiment. Direct NM and Indirect NM are implemented to Controller Area Network (CAN), and performance is analyzed using real applications. The result of this paper contributes that as a case of network situation, application engineer selects two types of OSEK NM for the best performance.

It is very important to communicate between the many electronic components in automobiles. If any component has an error, is possible for the error to affect other components. We propose a method of handling cyclic redundancy check (CRC) errors in the network using FlexRay. The FlexRay vehicle network protocol features fault-tolerance and guaranteed message latency. According to the FlexRay specification, each node in the FlexRay network decodes received messages and checks for various errors. However, if error occurs to any node, other nodes on the network do not know that a particular node generated an error. In this case, the node that did not receive the critical message cannot be guaranteed to demonstrate correct behavior. In order to solve this problem, we suggest a solution using dynamic messages supported by the FlexRay protocol.

This paper presents the unified gateway for an invehicle network using LIN, CAN and FlexRay. The presented gateway uses MPC5567 MCU, including LIN, CAN, and FlexRay communication controllers. In this paper, we propose a reliable gateway algorithm and architecture. In addition, an embedded system is developed for the gateway and the gateway function is implemented. The proposed system is evaluated by experiments under a HEV test bench environment.

High-quality courses offered to freshman engineering students can help them to develop into excellent engineers. Freshman-year courses have a great impact on these students. Students can learn what real engineers do by learning important aspects of an engineering career in their courses. Thus, improving the educational effect of courses is an important issue. Many design courses are offered to freshman engineering students at colleges around the world. This paper discusses a design course at SungKyunKwan University that uses LEGO. The course was offered from 2006 to 2008, and will be again in the future. This paper discusses a project-based course using LEGO that will be carried out in 2009 and its expected educational effects.