Comparison of two types of OSEK network management for CAN

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.