MODELING APPROACH FOR NETWORKED EMBEDDED SYSTEMS WITH HETEROGENEOUS COMMUNICATION Modeling Common Gateway Functionalities for Interconnection

摘要

This paper presents a method to create system level models of gateway facilities to combine embedded fieldbus networks. Here automotive applications are used as representative with CAN and FlexRay. A strategy is introduced to create gateway models, which provide high flexibility in terms of reusability, replaceability, extensibility and flexibility. Todays systems often incorporate a very complex heterogeneous communication structure with real time requirements. These characteristics have an influence on the system design process. The goal of avoiding design errors in early development stages requires the validation on hierarchical functional models of various abstraction levels using simulation based analysis prior to hardware design. A current approach includes problem oriented system analysis. This approach is extended to analyze the system behavior of heterogeneous embedded systems focusing on switching mechanisms. Here lies the challenge on the connection of subsystems with distinct fieldbuses realizing different paradigms. Regarding real time aspects paradigm switches can be a source of errors in the system design.