Title :
Fluid Queue Models of Battery Life
Author :
Jones, Gareth L. ; Harrison, Peter G. ; Harder, Uli ; Field, Tony
Author_Institution :
Dept. of Comput., Imperial Coll. London, London, UK
Abstract :
We investigate how a power-save mode affects the battery life of a device subject to stochastically determined charging and discharging periods. We use a multi-regime fluid queue, imposing a threshold at some value. When the power level falls below the threshold, (for example, 20% of charge remaining) a power-save mode is entered and the rate of discharge decreased. An expression for the Laplace transform of the battery life´s probability density function is found and inverted numerically in particular instances. We show the life of battery can be significantly improved by the introduction of the power-saving threshold.
Keywords :
Laplace transforms; probability; queueing theory; secondary cells; Laplace transform; battery life; fluid queue models; power-save mode affects; power-saving threshold; probability density function; rechargeable batteries; Batteries; Discharges; Equations; Laplace equations; Markov processes; Mathematical model; Reservoirs;
Conference_Titel :
Modeling, Analysis & Simulation of Computer and Telecommunication Systems (MASCOTS), 2011 IEEE 19th International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-1-4577-0468-0
DOI :
10.1109/MASCOTS.2011.61
