Minimizing Energy for Wireless Web Access with Bounded Slowdown
Minimizing Energy for Wireless Web Access with Bounded Slowdown
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DOI：
10.1145/570645.570660
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发表时间：
2002-09
影响因子：
3
通讯作者：
R. Krashinsky;H. Balakrishnan
中科院分区：
文献类型：
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作者：
R. Krashinsky;H. Balakrishnan
摘要在许多电池供电的移动的计算设备上，无线网络是总能耗的重要贡献者。在本文中，我们研究了节能协议和TCP性能之间的相互作用，Web类传输。我们发现，流行的IEEE 802.11省电模式（PSM），一个“静态”协议，可以通过增加快速往返时间（RTT）到100毫秒损害性能;在典型的Web浏览工作负载下，目前的实现将不必要地花费能量唤醒在长时间的空闲期间。为了克服这些问题，我们提出了有界减速（BSD）协议，PSM，动态适应网络活动。BSD是最小化能耗问题的最佳解决方案，同时保证连接的RTT不会增加超过其基础RTT的因子p，其中p是暴露最小化能耗和减少延迟之间的权衡的协议参数。我们提出了几个跟踪驱动的模拟结果表明，与静态PSM相比，Bounded-Slowdown协议将平均Web页面检索时间减少了5- 64%，同时将能耗降低了1-14%（与无电源管理相比降低了13倍）。
Abstract On many battery-powered mobile computing devices, the wireless network is a significant contributor to the total energy consumption. In this paper, we investigate the interaction between energy-saving protocols and TCP performance for Web-like transfers. We show that the popular IEEE 802.11 power-saving mode (PSM), a “static” protocol, can harm performance by increasing fast round trip times (RTTs) to 100 ms; and that under typical Web browsing workloads, current implementations will unnecessarily spend energy waking up during long idle periods. To overcome these problems, we present the Bounded-Slowdown (BSD) protocol, a PSM that dynamically adapts to network activity. BSD is an optimal solution to the problem of minimizing energy consumption while guaranteeing that a connection’s RTT does not increase by more than a factor p over its base RTT, where p is a protocol parameter that exposes the trade-off between minimizing energy and reducing latency. We present several trace-driven simulation results that show that, compared to a static PSM, the Bounded-Slowdown protocol reduces average Web page retrieval times by 5–64%, while simultaneously reducing energy consumption by 1–14% (and by 13× compared to no power management).