H. Hoang

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This paper presents work on a switched Ethernet network extended to allow for periodic real-time traffic, using earliest deadlinefirst (EDF) scheduling. A scheme of asymmetrically dividing deadlines of real-time channels between the in and outgoing linh toflrom the switch is proposed (ADPS). The scheme is compared with the simpler approach of dividing the(More)
There is a strong interest of using the cheap and simple Ethernet technology for industrial and embedded systems. This far, however, the lack of real-time services has prevented this change of used network technology. This paper presents enhancements to full-duplex switched Ethernet for the ability of giving throughput and delay guarantees. The switch and(More)
This paper presents work on a switched Ethernet network extended to allow for earliest deadline first (EDF) scheduling. We show by example that asymmetric deadline partitioning between the links of a real-time channel can increase the utilization substantially, still not violating the real-time guarantees. We also report measurements on a software(More)
This paper presents work on a switched Ethernet network extended to allow for periodic real-time traffic, using earliest deadline first (EDF) scheduling. A scheme of asymmetrically dividing deadlines of real-time channels between the in and outgoing links to/from the switch is proposed (ADPS). The result of the simulations of setting up RT channels over a(More)
Advanced embedded systems can consist of many sensors, actuators and processors that are deployed on one or several boards, while having a demand of interacting with each other and sharing resources. Communication between different components usually has strict timing constraints. There is thus a strong need to provide solutions for time critical(More)
We present a method for calculating the minimum EDF-feasible deadline. The algorithm targets periodic tasks with hard real-time guarantees, that are to be feasibly scheduled with EDF (Earliest Deadline First). The output is the smallest possible deadline required for feasibility, of the task most recently requested. The good thing with our algorithm is that(More)
This paper focuses on non linear control of non isothermal Continuous Stirred Tank Reactors (CSTRs). The model of the CSTR is thermodynamically consistent in order to apply the control strategy based on the concavity of the entropy function and the use of thermodynamic availability as Lyapunov function. More precisely the stabilization problem of continuous(More)
Current Real-Time applications are based on Worst-Case Time estimates. The RT-literature points out that a knowledge of Average-Case Time could help to improve budgeting of resources of Real-Time systems with a potentially drastic cost saving (e.g. [MP97],[Ram96],[HPS04]). However, progress in this area is hampered due to the fact that Average-Time analysis(More)
1 Abstract Recently, considerable interest has been building for using the relatively cheap and ubiquitous Ethernet network to support real-time applications. This paper discusses three recent papers proposing different methods allowing Ethernet to support real-time messaging requirements. Each of these papers accomplish predictable real-time behavior using(More)