Novel Weakly Hard Real-time System Based on Path RTL
Yi Yang · Journal of Chinese Computer Systems · 2012
Weakly hard real-time system has become increasingly important in the research of real-time system.However,classic weakly hard real-time system fails to show its advantage of real-time performance with the constraint by the number of tasks meeting or missing the deadline and has an obvious defect that the reliability of it can not be proved.With the concept of flexible deadline,this paper puts forward a novel weakly hard real-time system based on path RTL,which can efficiently solve the problem that the reliability of classic weakly real-time system can not be proved,and implement the constraint of weakly hard real-time with time-depended arguments.The novel weakly hard real-time also provides solutions for the newly emerged applications of weakly hard real-time systems.Moreover,a procedure is proposed to term the classic weakly hard real-time system so as to make the best of its existing research achievements in constraint specification and scheduling algorithm.The result shows that as compared with classic weakly real-time system,the new weakly hard real-time system based on path RTL has a better performance in system integrity,reliability and application fields.