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AUTOSAR (AUTomotive Open System ARchitecture) is a worldwide development cooperation of car manufacturers, suppliers and other companies from the electronics, semiconductor and software industry. Since 2003 they have been working on the development and introduction of an open, standardized software architecture for the automotive industry.
The primary goal of the AUTOSAR development cooperation is the standardization of basic system functions and functional interfaces, the ability to integrate, exchange and transfer functions within a car network and to substantially improve software updates and upgrades over the vehicle lifetime. Having this goal in mind, AUTOSAR pushes the paradigm shift from an ECU based to a function based system design attempt in automotive software development and enables the management of the growing E/E complexity with respect to technology and economics.
A fundamental design concept of AUTOSAR is the separation between:
- application and
- infrastructure
An application in AUTOSAR consists of interconnected “AUTOSAR software Components”.
The image shows an application consisting of three AUTOSAR Software Components which are interconnected by several “connectors”.
Each AUTOSAR Software Component encapsulates part of the functionality of the application. AUTOSAR does not prescribe how large the AUTOSAR Software Components are. Depending on the requirements of the application domain an AUTOSAR Software Component might be a small, reusable piece of functionality (such as a filter) or a larger block encapsulating an entire automotive functionality.
However, the AUTOSAR Software Component is a so-called “Atomic Software Component”. It cannot be distributed over several AUTOSAR ECUs. Consequently, each instance of an AUTOSAR Software Component that should be present in a vehicle is assigned to one ECU.
