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Coordinated atomic (CA) action is a widely used approach to structuring concurrent activities in distributed embedded applications. Recovery from failures is one of its major concerns. Despite the intuitive simplicity, reasoning about failure recovery in CA actions is rather complex because of the interaction between various system components. This paper proposes an approach based on timed CSP for...
Network performance engineering can verify the design and dimensioning of large size control networks like CSMA based building automation networks. It combines performance analysis with diagnosis methods to evaluate the network utilization and detect design errors before installation and can therewith save the expenses of overdimensioning and redesign. This paper will develop a diagnosis model based...
This work pretends to develop a robot for vigilance tasks that are able to tolerate diverse kinds of attacks and be able to operate in environments with elevated electromagnetic noise, being even immune to sabotage provoked by means of high electromagnetic fields. A new CAN based communications system that interconnects the different devices that compose the mobile robot has been developed to achieve...
A reported liability of the controller area network protocol is that it does not provide a clock synchronization service. Therefore, whenever a CAN-based distributed embedded system requires its nodes to have a common time base, clock synchronization has to be implemented by means of an external mechanism. In a previous work, we proposed a fault-tolerant and high-precision clock synchronization protocol...
The paper is concerned with the key issue of protecting FlexCAN networks against the babbling-idiot faults, e.g., node faults that busy the bus unduly. A full solution of the problem would enhance the dependability of these networks greatly, making them attractive for safety-critical applications. After analyzing the various modes by which a babbling-idiot fault affects the network operation, a classification...
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