Micro power management of active 802.11 interfaces
Micro power management of active 802.11 interfaces
复制标题
DOI：
10.1145/1378600.1378617
复制
发表时间：
2008-06
期刊：
影响因子：
--
通讯作者：
Jiayang Liu;Lin Zhong
中科院分区：
文献类型：
--
作者：
Jiayang Liu;Lin Zhong
无线接口是移动的系统上的主要功率消耗者。相当多的研究已经提高了延长的空闲周期的能量效率，或者在无线接口中创建了更长的空闲周期，这通常需要来自应用或网络基础设施的合作。随着无线移动的数据的增加，提高有源无线接口的能量效率变得至关重要。在这项工作中，我们提出了微电源管理（μPM），一个解决方案的灵感来自国家的最先进的802.11接口的高性能和许多流行的网络应用程序的适度的数据速率要求之间的不匹配。μPM使802.11接口即使在MAC帧之间也能进入不可达节能模式，而不会对流量产生明显影响。为了控制数据丢失，μPM利用802.11中的重传机制，并控制帧延迟，以适应所需的网络吞吐量，同时最大限度地减少接入点的协作。基于一个理论框架，我们采用仿真系统地研究了μPM的有效和高效的实现。我们已经建立了一个原型μPM上的开放访问的无线硬件平台。测试结果表明，μPM技术可使无线收发器的功耗降低30%以上，且在各种应用中不会出现明显的质量下降。
Wireless interfaces are major power consumers on mobile systems. Considerable research has improved the energy efficiency of elongated idle periods or created more elongated idle periods in wireless interfaces, often requiring cooperation from applications or the network infrastructure. With increasing wireless mobile data, it has become critical to improve the energy efficiency of active wireless interfaces. In this work, we present micro power management (μPM), a solution inspired by the mismatch between the high performance of state-of-the-art 802.11 interfaces and the modest data rate requirements by many popular network applications. μPM enables an 802.11 interface to enter unreachable power-saving modes even between MAC frames, without noticeable impact on the traffic flow. To control data loss, μPM leverages the retransmission mechanism in 802.11 and controls frame delay to adapt to demanded network throughput with minimal cooperation from the access point. Based on a theoretical framework, we employ simulation to systematically investigate an effective and efficient implementation of μPM. We have built a prototype μPM on an open-access wireless hardware platform. Measurements show that more than 30% power reduction for the wireless transceiver can be achieved with μPM for various applications without perceptible quality degradation.