By Christophe Aubrun, Daniel Simon, Ye-Qiong Song
This e-book describes co-design ways, and establishes the hyperlinks among the QoC (Quality of regulate) and QoS (Quality of provider) of the community and computing assets. The equipment and instruments defined during this ebook consider, at layout point, a variety of parameters and homes that has to be chuffed via platforms managed via a community. one of the vital community houses tested are the QoC, the dependability of the method, and the feasibility of the real-time scheduling of projects and messages. right exploitation of those ways permits effective layout, prognosis, and implementation of the NCS. This ebook might be of serious curiosity to researchers and complicated scholars in automated regulate, real-time computing, and networking domain names, and to engineers tasked with improvement of NCS, in addition to these operating in similar community layout and engineering fields.
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Additional info for Co-design Approaches to Dependable Networked Control Systems
Fixed priority scheduling Let the priority of the tasks τi be classiﬁed in decreasing orders: i < j ⇒ the priority of τi is higher than that of τj ; in the case of RM or DM, the priority of τi is 1 m in(D i ,T i ) . In [LIU 73], under pre-emptive RM, the following sufﬁcient condition is established on the feasibility of the task set for ∀i, Di = Ti : n i= 1 1 Ci ≤ n · 2n − 1 . 31%. In [LIU 73], it has also been shown that the worst-case response time is obtained when the ﬁrst instances of all the tasks are synchronized.
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This number of missed deadlines is referred to as the distance to failure state from the current state. DBP assigns priority to a given instance by the distance from the current k-sequence to a failure state. Considering the above example with (3, 5)-ﬁrm constraint, the current instance is assigned the priority of 2 if the current 5-sequence is (11011), and is set the priority of 3 if the current 5-sequence is (10111). Note that in case of equal priority, EDF is used to break the tie. 2. Evolution of the k-sequence non-pre-emptive DBP, a ﬁrst necessary schedulability condition has been given in [POG 03].