What is the Limit of Energy Saving by Dynamic Voltage Scaling?
What is the Limit of Energy Saving by Dynamic Voltage Scaling?
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Date
2001-11
Authors
Qu, Gang
Advisor
Citation
G. Qu. " What is the Limit of Energy Saving by Dynamic Voltage Scaling?" IEEE/ACM International Conference on Computer Aided Design, pp. 560-563, November 2001.
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Abstract
Dynamic voltage scaling (DVS) is a technique that varies the supply
voltage and clock frequency based on the computation load to
provide desired performance with the minimal amount of energy
consumption. It has been demonstrated as one of the most effective
low power system design techniques, in particular for real time
systems. Previously, there are works on both ends of the DVS systems:
the ideal variable voltage system which can change its voltage
with no physical constraints, and the multiple voltage system
which has a number of discrete voltages available simultaneously.
In this paper, we study the DVS systems between these two extreme
cases. We consider systems that can vary the operating voltage dynamically
under various real-life physical constraints. Based on
the system’s different behavior during voltage transition, we define
the feasible DVS system and the practical DVS system. We build
mathematical model to analyze the potential of DVS on energy saving
for these different systems. Finally, we simulate the behavior
of a secure wireless communication networks with DVS systems.
The results show that DVS results in energy reduction from 36% to
79%, and the real life DVS systems can be very close to the ideal
system in energy saving.