第306回研究講演会開催案内


日時:2003年12月9日(火)10:30〜12:00
場所: 東北大学電気通信研究所 2号館2階W214号室
講師:Wai-Tung Ng
演題:Advanced Power Management in Today's Power-Hungry Mobile

概要: The recent proliferation of handheld devices is underlining the need for sophisticated real-time power-management strategies. Today's computing systems capitalize on low-demand cycles to turn off various modules and reduce power consumption. As the gate-oxide and MOS threshold are scaled down in nanotechnologies, leakage power is rapidly approaching dynamic power consumption during non-idle states. This talk will focus on Dynamic Voltage Scaling (DVS) and Dynamic Threshold Scaling (DVTS) as promising solutions for power optimization. DVS refers to the optimal scaling of the supply voltage while operating at a desired target frequency. This can be achieved using a dedicated closed-loop hardware module, which minimizes the supply voltage for a target frequency. In DVTS, the MOS threshold is dynamically controlled through substrate-biasing in order to further optimize the tradeoff between performance and power consumption. Both techniques rely on the fact that real-time computing tasks (such as frame decoding) often result in predictable workloads, whereby the power management algorithm can dynamically select a target frequency to meet the hardware deadlines. This presentation will focus on the tradeoffs between DVS and DVTS, while providing implementation details.

問い合わせ先:  
羽生貴弘
仙台市青葉区片平2−1−1
東北大学電気通信研究所
(022)217-5679/(022)217-5481
E-mail: hanyu@riec.tohoku.ac.jp