Battery-Aware Static Scheduling for Distributed Real-Time Embedded Systems

This paper addresses battery-aware static scheduling in batterypowered distributed real-time embedded systems. As suggested by previous work, reducing the discharge current level and shaping its distribution are essential for extending the battery lifespan. We propose two battery-aware static scheduling schemes. The first one optimizes the discharge power profile in order to maximize the utilization of the battery capacity. The second one targets distributed systems composed of voltage-scalable processing elements (PEs). It performs variable-voltage scheduling via efficient slack time re-allocation, which helps reduce the average discharge power consumption as well as flatten the discharge power profile. Both schemes guarantee the hard real-time constraints and precedence relationships in the real-time distributed embedded system specification. Based on previous work, we develop a battery lifespan evaluation metric which is aware of the shape of the discharge power profile. Our experi...

• Type: Conference
• Year: 2001
• Where: DAC
• Authors: Jiong Luo, Niraj K. Jha
• Keywords: Battery Lifespan, DAC 2001, Design Automation, Discharge Power Consumption, Discharge Power Profile