考虑电池放电特性的动态电压调节策略研究  

The Research on Battery-aware Dynamic Voltage Scaling Policy

作　　者：许参[1] 胡晨[1] 

机构地区：[1]东南大学国家ASIC系统工程中心,南京210096

出　　处：《中国工程科学》2008年第2期79-85,共7页Strategic Study of CAE

基　　金：国家自然科学基金资助项目(90407009)

摘　　要：电池寿命是移动设备的关键设计参数之一。由于电池容量消耗的非线性和与负载轮廓相关的特性,最大化电池寿命是个相当困难的问题。研究了在考虑电池放电特性情况下动态电压调节策略(DVS,dynamic voltage scaling)最小化电池容量消耗的问题。针对现有考虑电池放电特性的DVS策略中空闲时间分配不合理的缺陷,提出了空闲时间分布调整过程,用于优化空闲时间分布从而减少电池容量消耗,并分析了该过程对任务调度的影响。实验结果表明对现有考虑电池放电特性的DVS策略形成的任务调度进行空闲时间分布调整将进一步减少电池容量消耗。Battery lifetime is one of the critical design parameters for mobile computing devices. Maximizing the battery lifetime is a particularly difficult problem due to the nonlinearity of the battery discharge behavior and its dependence on the discharge profile. In this paper, the problem of task scheduling with dynamic voltage scaling such that the maximum consume battery capacity is addressed. To deal with the shortcoming of the existing battery-aware DVS policy, the idle time distribution adjustment procedure is proposed, which optimizes idle time distribution and then reduce the battery capacity consumption, and the change of task scheduling under the procedure is analyzed. The experiment results show that the proposed procedure can save more battery capacity consumption evidently than the existing battery-aware DVS policy.

关 键 词：电池优化 动态电压调节 空闲时间分布调整 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]