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We analyse the use of a ΔΣ-modulator in the nodes of a wireless sensor network, which is a new method to achieve long term synchronization. We consider star topology WSNs (Wireless Sensor Networks) with a central base station and address timing synchronization using low frequency realtime clocks. The WSN uses a beacon driven TDMA-protocol for bidirectional node/base communication. Between the beacons,...
Mobile devices in industrial settings became commonplace with different handheld equipment and mobile robots using COTS WiFi interfaces for communication. This growth in the use of the wireless medium increases the potential for overload and consequent long delays and high losses. Traffic segregation with different Quality of Service (QoS) classes can attenuate the problem but does not solve it within...
Cyber-physical systems show their impacts in many areas including industrial automation. Design and analysis of cyber-physical automation systems requires an integral model that takes into account tight coordination of control, communication and physical plants dynamics, thus creating a new research domain, namely industrial cyber-physical systems. This paper proposes a new execution semantics for...
The introduction of multi-core computing platforms aims at providing more computing resources and additional interfaces to answer the needs of new automotive control strategies with respect to computing performances and connectivity (e.g. connected vehicle, hybrid powertrains). At the same time, the parallel execution and resulting resources and timing conflicts require a paradigm change for the embedded...
In a hard Real-Time (HRT) domain such as avionics, the high application performance is as important as delivering a predictable execution time. More precisely, the performance is defined by the application Worst-Case Execution Time (WCET). A common practice to boost the application performance in general purpose computing is by parallelisation and parallel execution on a shared memory multicore processor...
The mainstream of embedded software development as of today is dominated by C programming. To aid the development, hardware abstractions, libraries, kernels and lightweight operating systems are commonplace. Such kernels and operating systems typically impose a thread based abstraction to concurrency. However, in general thread based programming is hard, plagued by race conditions and dead-locks....
Smart grids have attracted the attention of the scientific community for years, since the ability to better manage distributed resources in a dynamic grid scenario is of paramount importance. Among the solutions that have been investigated, there is the smart transformer (ST) distribution concept, where an AC/AC power converter substitutes the traditional distribution transformer while enabling additional...
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