基于自主设计的嵌入式低功耗硬件平台,深入分析了Linux系统休眠态的功耗管理技术。在分析Linux休眠机制下高级电源管理(APM,Advanced Power Management)的基础上,设计并实现了系统休眠态的驱动层和内核适配层;提出了一种基于阈值预测的...基于自主设计的嵌入式低功耗硬件平台,深入分析了Linux系统休眠态的功耗管理技术。在分析Linux休眠机制下高级电源管理(APM,Advanced Power Management)的基础上,设计并实现了系统休眠态的驱动层和内核适配层;提出了一种基于阈值预测的系统休眠策略。基于硬件平台的实验结果表明,设计的系统功耗管理技术能够将系统休眠功耗降低到全速运行时的6%,接近硬件平台的理论休眠功耗极限。展开更多
To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is di...To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.展开更多
文摘基于自主设计的嵌入式低功耗硬件平台,深入分析了Linux系统休眠态的功耗管理技术。在分析Linux休眠机制下高级电源管理(APM,Advanced Power Management)的基础上,设计并实现了系统休眠态的驱动层和内核适配层;提出了一种基于阈值预测的系统休眠策略。基于硬件平台的实验结果表明,设计的系统功耗管理技术能够将系统休眠功耗降低到全速运行时的6%,接近硬件平台的理论休眠功耗极限。
文摘在Windows"控制面板"中有一个"电源选项",该选项可以降低计算机设备或整个系统的耗电量.其中的休眠模式不仅可以节约电能,还有不少妙用呢!
一、认识休眠
"休眠"是英文单词hibernation(冬眠)的意译,指原先我们常说的挂起到硬盘(STD,Suspend to Disk),其原理是在硬盘上开辟一块与内存等大的区域,在休眠时,系统把内存全部映像到该区域,然后才切断电源,关闭计算机.当再次开机时,系统直接把保存在硬盘中的内存数据读入,并映像回内存,完全恢复关机时的状态,这时上次关机时所有运行的应用程序可以立即恢复运行.
基金partially supported by the National Natural Science Foundation of China(61271187)the "863" Project (2014AA01A701)+2 种基金the Provincial Natural Science Foundation of China(20122BAB211039)the PAPD fundthe CICAEET fund
文摘To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.
