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Presenter: Dr. Daler N. Rakhmatov, Burnaby, BC
Supervisor:

Date: Thu, December 19, 2002
Time: 14:00:00 - 15:00:00
Place: CIT 116

ABSTRACT

Abstract

As the system complexity grows exponentially, low power consumption becomes a critical design challenge, especially for energy-autonomous portable devices. To achieve long on-line lifetime of a mobile computing terminal, the interaction between energy supply and energy demand must be optimized. To enable automation of this performance-constrained energy optimization process, adequate models of embedded system components are needed.

In particular, the first part of the seminar focuses on analytical modeling of the power source component, i.e., a battery. Experimental data show that batteries exhibit nonlinear behavior: delivered energy depends on discharge conditions. The proposed model accurately captures this dependency, while remaining parametrically simple and robust. More importantly, it can serve as an analytical basis for a formal CAD framework targeting lifetime optimization via shaping the battery load profile. The second part of the seminar will address the problems of task sequencing and voltage scaling that result in discharge conditions improving system energy efficiency.

For Further Information Contact
Dr. N.J. Dimopoulos (721-8902)