Voltage Scaling for Reduced Energy Consumption in Real-Time Systems Using Variable Voltage Processor

가변 전압 프로세서를 사용하는 실시간 시스템에서 소비 전력감소를 위한 전압조절

Energy consumption has become an increasingly important consideration in designing real-time embedded systems. In this paper, we propose a voltage scaling method to reduce energy consumption in fixed priority real-time systems using variable voltage processors. The Hyperperiod of tasks is divided into dimains. The most suitable voltage of each domain is determined off-line and stored in a table. During task execution, the voltage of processor is adjusted according to the information of the table. A simulation result shows that the proposed method can reduce 80% of power consumption in comparison to no power management. The difference to the optimal EDF based method is only 5%.