A low power architecture for wireless multimedia systems: lessons learned from building a power hog
A low power architecture for wireless multimedia systems: lessons learned from building a power hog
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无线多媒体系统的低功耗架构：从构建耗电设备中汲取的经验教训
DOI：
10.1109/lpe.1996.542725
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
R. Jain
中科院分区：
文献类型：
--
作者：
W. Mangione;P. Ghang;S. Nazareth;P. Lettieri;W. Boring;R. Jain
加州大学洛杉矶分校已经建立了一个网络测试床，作为开发无线多媒体系统的环境。第一代测试平台由一组电池供电的终端组成，这些终端具有通过扩频无线电连接到对等多跳网络的低比特率视频编解码器。毫不奇怪，这组功能在操作期间消耗相当大的电流，并且使用24 Wh NiMH电池实现约1小时的电池寿命。本报告讨论了现有的测试平台的功耗，在其发展过程中吸取的经验教训，并针对提高便携式多媒体终端的电池寿命的行动方针。关键的进步是开发了一个完整的系统架构，重点是关闭组件和子系统的电源。从通信协议开始，从处理器到API，这种新设计通过显著减少电流消耗来延长有用的电池寿命。
UCLA has constructed a network testbed which serves as an environment for developing wireless multimedia systems. The first generation testbed consists of a set of battery powered terminals with low-bit rate video codecs connected to a peer-to-peer multi-hop network over spread spectrum radios. Not surprisingly, this set of features draws considerable current during operation, and achieves a battery life of approximately one hour using a 24 Wh NiMH battery. This report discusses the power consumption of the existing testbed, lessons learned during its development, and a course of action directed to improving battery life for a portable multimedia terminal. The key advancement is the development of a complete system architecture focused on turning off power to components and subsystems. Starting with communications protocols, and progressing up through processors to APIs, this new design extends useful battery life through a significant reduction in current drain.