Search results for: R. Obermaisser
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Lecture Notes in Computer Science > Software Technologies for Embedded and Ubiquitous Systems > Model-Driven Development > 34-45
Complex embedded computer systems can encompass multiple application subsystems, such as a multimedia, a powertrain, a comfort and a safety subsystem in the in-vehicle electronic system of a typical premium car. Information exchanges between these application subsystems are essential to realize composite services that involve more than one application subsystem and to reduce redundant computations...
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IFIP — The International Federation for Information Processing > From Specification to Embedded Systems Application > 211-222
The TMO model for real-time distributed object-computing supports the specification of temporal constraints with respect to a global time base and provides execution engines for ensuring that these constraints are met at runtime. This paper describes a solution for supporting TMO applications on top of the Time-Triggered Architecture, a system architecture that meets the dependability requirements...
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Embedded systems have gained immense importance in various domains and they evolve rapidly driven by the necessity to cope with new emerging technologies and new required functionalities. The requirements of evolving embedded systems are subject to changes, thereby leading to repeated redesigns. In model-driven engineering the application's functional and nonfunctional requirements are specified separately...
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Mixed-criticality architectures with support for modular certification make the integration of application subsystems with different safety assurance levels both technically and economically feasible. Strict segregation of these subsystems is a key requirement to avoid fault propagation and unintended side-effects due to integration. Also, mixed-criticality architectures must deal with the heterogeneity...
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The high integration of current silicon devices leads to growing transient failure rates for multi-core based embedded systems. As a consequence, we can develop on-chip fault tolerance solutions to increase the reliability of Multi-Processor Systems-on-a-Chip (MPSoCs), for instance, the active redundancy of cores (e.g., on-chip Triple Modular Redundancy) which requires independence among the replicated...
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Fault containment between components is a significant property in embedded real-time systems in order to improve robustness, attain clear integration responsibilities and enable modular certification. This paper presents fault containment mechanisms, which are based on the time-triggered Network-on-a-Chip (NoC) of a reconfigurable MPSoC. Each component accesses this NoC via a communication interface...
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Current embedded systems offer enough performance to integrate on a single chip jobs that required several distributed devices in the past. The execution environment of such an integrated architecture should satisfy key requirements, such as, temporal predictability, fault containment or flexibility. In this paper we present these requirements and argue about the suitability of embedded hypervisors...
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Controller Area Network (CAN) provides an inexpensive and robust network technology in many application domains. However, the use of CAN is constrained by limitations with respect to fault isolation, bandwidth, wire length, namespaces and diagnosis. This paper presents a solution to overcome these limitations by replacing the CAN bus with a star topology. We introduce a CAN router that detects and...
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A higher level of abstraction is required in the design of Multi-Processor Systems-on-a-Chip (MPSoCs) as complexity increases due to the integration of more and more applications on a single chip. This paper introduces a model-based development process, in which a precise specification of the interfaces between IP cores serves as the foundation for an independent development and a seamless system...
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The GENESYS (Generic Embedded System) project is a European research project that aims to develop a cross-domain architecture for embedded systems. The requirements and constraints for such an architecture are documented in the ARTEMIS strategic research agenda in the form of seven key challenges. This paper presents the architectural style of GENESYS by listing the key architectural principles, such...
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IEEE Transactions on Computer-Aided Design of Integrated Circuits and... > 2009 > 28 > 7 > 956 - 965
This paper describes an integrated system architecture for automotive electronic systems based on multicore systems-on-chips (SoCs). We integrate functions from different suppliers into a few powerful electronic control units using a dedicated core for each function. This work is fueled by technological opportunities resulting from recent advances in the semiconductor industry and the challenges of...
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Dynamic resource management enables a system to dynamically react to changing resource demands or resource availability. It enables better resource utilization, improved dependability, and the enabling of power-aware system behavior. This paper examines the application of dynamic resource management for an integrated time-triggered system architecture for embedded systems, which is designed to support...
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The composition of a large SoC out of pre-validated IP-cores requires an architecture that enables the seamless integration of components, i.e. composability. In this paper we present the five principles of composability that must be supported by any architecture that claims to enable the constructive composition of components. After the introduction of the TTSoC architecture and a description of...
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The time-triggered system-on-a-chip (TTSoC) architecture enables the realization of mixed-criticality systems using SoCs. The integration of subsystems with different criticality enables massive cost reduction by reducing the overall number of devices and networks (e.g., ECUs in car). To accomplish this goal, the TTSoC architecture offers inherent fault isolation mechanisms that prevent any unintended...
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It is the objective of the presented System-on-a-Chip (SoC) architecture to provide a predictable integrated execution environment for the component-based design of many different types of embedded applications (e.g., automotive, avionics, consumer electronics). At the core of this architecture is a time-triggered network-on-a-chip for the predictable interconnection of heterogeneous components. A...
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Real-time Linux variants are becoming prominent solutions for the development of embedded systems. Compared to traditional real-time operating systems, embedded system engineers can leverage solutions and knowhow from the Linux development community (e.g., development tools, applications, drivers). Due to the availability of implementations of Internet protocols and network drivers, Linux also facilitates...
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The problem of naming has been extensively studied in the field of distributed systems. However, multi-processor system-on-a-chips (MPSoCs), which are becoming more and more important in the construction of complex embedded systems, exhibit unique challenges with respect to naming. These challenges are induced by the need for dynamic resource management, independent development of IP cores and application...
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The ongoing technological advances in the semiconductor industry make Multi-Processor System-on-a-Chips (MPSoCs) more attractive, because uniprocessor solutions do not scale satisfactorily with increasing transistor counts. In conjunction with the increasing rates of transient faults in logic and memory associated with the continuous reduction of feature sizes, this situation creates the need for...
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IEEE Transactions on Dependable and Secure Computing > 2008 > 5 > 2 > 99 - 114
Integrated architectures in the automotive and avionic domain promise improved resource utilization and enable a better coordination of application subsystems compared to federated systems. An integrated architecture shares the system's communication resources by using a single physical network for exchanging messages of multiple application subsystems. Similarly, the computational resources (for...
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As part of the DECOS architecture, this paper presents a generic framework for gateways, which enable message exchanges across application subsystem boundaries in order to exploit redundancy and to coordinate the behavior of application subsystems. In the DECOS architecture, networks of different application subsystem can exhibit property mis matches, such as different protocols (e.g., CAN protocol...
