Mälardalen University Press Dissertations No.26 Share-Driven Scheduling of Embedded Networks

Many products are built from more or less independently developed sub-systems. For instance, a car consists of subsystems for transmission, braking, suspension, etc. These subsystems are frequently controlled by an embedded computer system. In the automotive industry, as well as in other application domains, there is currently a trend from an approach where subsystems have dedicated computer hardware and other resources (a federated approach) to an approach where subsystems share hardware and other resources (an integrated approach). This is motivated by a strong pressure to reduce product cost, at the same time as an increasing number of subsystems are being introduced. When integrating subsystems, it is desirable that guarantees valid before integration are also valid after integration, since this would eliminate the need for costly reverifications. The computer network is a resource that is typi-cally shared among all subsystems. Hence, a central issue when integrating subsystems is to provide an efficient scheduling of message transmissions o