System-Level Power Management Design on Portable Multimedia Device

Limiting the energy consumption of portable device is becoming increasing important. Dynamic Power Management (DPM) schemes (also called policies) can be used to control the power consumption levels of electronic systems. In this paper, the authors looked into existing energy-saving architectures, modeled the power consumption of a Philips multimedia device prototype, and introduced a dynamic power management solution. This DPM is to automatically monitor the work pattern (including time spent, network conditions, CPU conditions) of the device on a regular time basis, combined with its previous pattern, then decide whether to switch off the components and enter into a low power mode (leave only kernel running).