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54/2005 : Resource Specification of the DECOS Integrated Architecture

RR Number
54/2005
Author(s)
Bernhard Huber, Roman Obermaisser, Philipp Peti, Christian El Salloum
Abstract
System design in DECOS adheres to the model-driven design methodology (MDA) introduced by the OMG, which enables technology-invariant modeling of distributed embedded applications. This separation of the actual implementation platform and the application functionality is achieved by describing the functionality of the distributed system by so-called Platform Independent Model (PIM), which focus on the specification of functionality, performance, and dependability requirements of the distributed application. It is now the challenge of the software-hardware integration to utilize those technology independent descriptions of the Distributed Application Subsystems to allocate executable units of the distributed application, so-called jobs, on particular hardware elements of the distributed platform. For facilitating this software-hardware integration, a description of the hardware platform that identifies the target elements of the hardware resources for the allocation of jobs and specifies their characteristics and interrelationship is a mandatory prerequisite. The Hardware Specification Model defined in this document defines the rules that have to be observed when describing the available resources of a target platform of the DECOS integrated architecture. Furthermore, it is the scope of this document is to identify a framework that facilitates the capturing of the resource information of DECOS target platforms as well as the integration of this information in the design workflow of the DECOS architecture. An exemplary tool chain, mostly consisting of already existing tools, is presented, which can be utilized for the instantiation of the UML models (i.e. the actual specification of the available resources), for checking the correctness of the generated resource description, and for the transformation into the proposed output format. The output format of the hardware resource descriptions defines the interface to the subsequent design steps of the software-hardware integration.
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