System-level integrated power management for handheld systems
- Authors
- Min, Jung-Hi; Cha, Hojung; Ha, Rhan
- Issue Date
- May-2009
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Energy management; System-level power management; Handheld systems; LCD; WNIC
- Citation
- MICROPROCESSORS AND MICROSYSTEMS, v.33, no.3, pp.201 - 210
- Journal Title
- MICROPROCESSORS AND MICROSYSTEMS
- Volume
- 33
- Number
- 3
- Start Page
- 201
- End Page
- 210
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/21860
- DOI
- 10.1016/j.micpro.2008.12.002
- ISSN
- 0141-9331
- Abstract
- We propose a system-level integrated power management scheme for battery-operated handheld systems such as cell phones and PDAs. Rather than dealing separately with each system component, we consider the interactions between CPU, WNIC (wireless network interface card). LCD, and applications, to reduce energy consumption at the system-level. Depending on the type of applications, the proposed scheme takes the interaction between CPU voltage and frequency and either LCD clock frequency or WNIC power modes, selectively, or both of them. The proposed method selects voltage for CPU in the context of LCD clock speed to reduce the system energy consumption. The application type and the power mode of WNIC are also considered to control the CPU voltage and frequency. Experimental results show that our scheme reduces the system energy consumption by as much as 30% compared to the systems of simply combining DVS (dynamic voltage scaling) and DPM (dynamic power management) or those of using no energy saving policy. (C) 2009 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/21860)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.