Energy-Efficient Data Access for Pervasive Computing

普适计算的节能数据访问

• 批准号: 0306251
• 负责人: Jason Flinn
• 金额: $ 34.99万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2008-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0306251&HistoricalAwards=false
• 关键词: Energy; Efficient; Data; Access; Pervasive

Energy-efficiency is vital for pervasive computing. Small, mobilecomputers such as handhelds are battery powered. They must carefullymanage their limited energy supply in order to run demandingapplications for long periods of time. Pervasive computers are alsoincreasingly well-connected to the Internet by wireless networks.However, connectivity is costly: communication is a large and growingportion of their power budgets. Current data access mechanismsexacerbate the problem---they substantially increase the energy costof communication because they are optimized for performance, notenergy-efficiency.This research investigates how to build energy-efficient distributedfile systems for pervasive computing. The first step is buildingmeasurement infrastructure that precisely captures the communication,storage, and computation costs of data access. The next step ischaracterizing the energy usage of existing distributed file systemsand identifying characteristics that increase energy-efficiency. Thefinal step is building a new, energy-efficient file system thatenables pervasive computers to maintain connectivity withoutcompromising battery lifetime. This research thus allows pervasivecomputing devices to be incorporated into everyday activities. Forexample, all-day battery life is essential for projects that deeplyintegrate handheld computers into classroom activity.

能效对于普适计算至关重要。像手持设备这样的小型移动计算机是由电池供电的。他们必须谨慎地管理有限的能源供应，以便长时间运行按需应用程序。无处不在的计算机也越来越好地通过无线网络连接到互联网。然而，连接是昂贵的：通信在它们的电力预算中占很大比例，而且还在不断增长。当前的数据访问机制加剧了这一问题-它们大大增加了通信的能源成本，因为它们针对性能而不是能源效率进行了优化。本研究调查了如何为普适计算构建节能的分布式文件系统。第一步是建立精确捕获数据访问的通信、存储和计算成本的测量基础设施。下一步是确定现有分布式文件系统的能源使用情况，并确定可提高能效的特征。最后一步是构建一种新的、节能的文件系统，使普及性计算机能够在不影响电池寿命的情况下保持连接。因此，这项研究使普及的计算机设备可以融入日常活动。例如，对于将手持计算机深度融入课堂活动的项目来说，全天的电池续航时间是必不可少的。