Safe Intra-Task Voltage Scheduling Algorithm Using Scenario Detection

In this paper, an improved safe intra-task voltage scheduling algorithm using scenario detection is proposed for the energy-efficient designs of the mobile embedded real-time systems. The ranges of few parameters in the program of the task are used to describe scenarios which are detected in the process of the task execution, and some of the remaining execution paths can accurately be predicted in the on-line mode which can optimize the voltage scheduling. Furthermore, the most reasonable points in the program to detect scenarios are searched out by the proposed scenario detection point positioning algorithm. The implementing method of the algorithm is presented and the effectiveness on reducing energy consumption of the task execution is validated through the simulation studies.