An Efficient Power Management Mechanism for WiFi-based Handheld Systems
We propose a system level dynamic power management scheme that considers interaction between CPU and WNIC, and types of workload to reduce energy consumption of handheld systems. The proposed scheme determines the clock speed (voltage) for the CPU and the power mode for WNIC according to the workload type. This mechanism works based on two observations: the consumed power of WNIC is reduced when the clock speed of CPU is increased, and the power modes of WNIC and the clock speed of CPU have different values based on the kind of workload. Experimental results show that on the average the proposed scheme reduces energy consumption by 8％ for BE (Best Effort) workload, 3％ for CBR (Constant Bit Rate) workload, and 16％ for interactive when compared to DVFS (Dynamic Voltage and Frequency Scaling) for CPU and DPM (Dynamic Power Management) for WNIC.
CPU WNIC DVFS DPM energy consumption
Jung-Hi Min Hojung Cha Vason P.Srini
Dept.of Computer Science,Yonsei University Seoul,120-749,Korea BWRC,University of California,Berkeley,CA 94720,USA
国际会议
武汉
英文
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）