A selective DVS technique based on battery residual

Conventional research on DVS assumes that the battery, which is the power source of most mobile devices, provides constant power; the battery, however, has unique discharge characteristics due to its chemical properties. Based on the residual characteristics of the battery, this paper presents a practical approach towards a battery-aware DVS mechanism that can easily be applied to conventional operating systems. The proposed policy monitors the battery residual in runtime, classifies the current battery state as one of three--the recovery effect region, the rate capacity region and the alarm region--then applies a suitable DVS algorithm according to each region, which takes advantage of the underlying battery characteristics. Experiments on commercial PDAs (iPAQ5550 and Zaurus SL-860 PDA) running MPEG applications showed that our policy significantly extends the battery lifetime, compared to the conventional DVS method, with only a marginal QoS degradation. q 2005 Published by Elsevie...

• Type: Journal
• Year: 2006
• Where: MAM
• Authors: Sukwon Choi, Hojung Cha, Rhan Ha
• Keywords: Conventional Operating Systems, Current Battery State, MAM 2006, Unique Discharge Characteristics