Power aware network interface management for streaming multimedia
Power aware network interface management for streaming multimedia
复制标题
用于流媒体的功率感知网络接口管理
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
B. Riccò
中科院分区：
文献类型：
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作者：
D. Bertozzi;L. Benini;B. Riccò
便携式设备(手持终端、PDA、笔记本电脑等)中的相当大一部分电力由无线网络接口卡(NIC)提取。我们测试了一种新的电源管理技术的可行性，该技术基于客户端控制的流媒体应用正在进行的网卡关闭模式的开发。基本思想是在播放帧时关闭该卡，直到客户端缓冲区中达到低阈值级别。在本文中，对与将卡从关闭模式恢复相关的定时和功率开销做出了悲观的假设，但仍然实现了比标准IEEE 802.11机制所产生的平均功率消耗约25%的功率节省。我们还提供了设计曲线，显示了使我们的技术有效的最小缓冲区大小，作为网络带宽和卡特性的函数。
A significant fraction of the power in portable devices (handheld terminals, PDAs, laptops, etc.) is drawn by the wireless network interface card (NIC). We test the viability of a novel power management technique, based on the exploitation of the NIC off-mode while a client-controlled streaming multimedia application is in progress. The basic idea is to switch off the card while frames are being played back, until a low-threshold level is reached in the client buffer. In this paper, pessimistic assumptions are made on the timing and power overheads associated with recovering the card from off-mode, but nevertheless a power saving of about 25% is achieved over the average power consumption incurred by the standard IEEE 802.11 mechanism. We also provide design curves showing the minimum buffer size that makes our technique effective, as a function of the network bandwidth and of the card characteristics.