NeTS: Small: Power-Performance Tradeoffs for Mobile Devices in Next Generation WiFi Networks

随着智能手机和其他移动设备的巨大增长，以及它们运行的越来越复杂的应用程序，每个用户都能感受到能源消耗的影响。为了节省能源，智能手机电池需要经常充电，或者设备在限制其功能的模式下运行。智能手机的很大一部分能耗来自WiFi无线电波。下一代WiFi无线电包括一系列丰富的功能，提供更高的比特率，更远的范围和更可靠的覆盖范围。然而，这些好处往往是以更高的功耗为代价的。因此，智能手机制造商通常会限制用户可以使用的功能，从而以性能为代价来节省电力。此外，对移动设备中的多媒体等计算特性的需求不断增加，导致图形和内存使用复杂的计算硬件和外设，对总体能耗的贡献更高。因此，有必要开发一种全面的方法来进行功率分析，考虑通信和计算范式，以及有效利用电池功率而不影响性能的新协议，这是本项目的目标。这项工作可以对在移动环境中更好地利用能源产生持久的影响。该项目旨在开发模型，以捕获支持WiFi的移动设备的功耗性能权衡，以及下一代WiFi标准的不同特性对这些权衡的影响。这些模型将基于在各种情况下使用不同移动设备进行的广泛测量研究而开发。此外，它还试图构建现实的功率模型，该模型考虑了系统的不同组件及其相互作用，而不仅仅是CPU，以及系统级别的功率性能权衡模型。将开发计算元件和外设的功耗分析，通过功率建模和测量，考虑影响功耗的各种因素，例如应用程序、环境和使用概况。然后将结果与WiFi模型集成，从而形成整体功率模型和配置文件。开发的模型将指导新的电源管理、速率适应和WLAN管理协议的设计，这些协议将允许移动设备实现更多的潜力，同时最大限度地降低功耗和对其他WLAN客户端的影响。该项目将通过外展活动提高人们对现代移动设备能耗问题的认识。

With the tremendous growth in smartphones and other mobile devices, and the increasingly complex applications they run, the impact of the energy consumption is felt by every user. Smartphone batteries need to be charged too often or the devices are run in modes that limit their capabilities, to save energy. A major fraction of the energy consumption in smartphones comes from the WiFi radio. The next generation WiFi radios include a rich set of features offering increased bit rates, longer range, and more reliable coverage. However, these benefits often come at the cost of significantly higher power consumption. Consequently, smartphone manufacturers often restrict the features available to the users, thus trading performance for power savings. Also, the increasing demand for computational features such as multimedia in mobile devices has led to the use of complex computational hardware and peripherals for graphics and memory with higher contribution to the overall energy consumption. Hence, there is a need to develop a holistic approach to power analysis that considers both the communication and the computational paradigms, and novel protocols that efficiently utilize the battery power without compromising performance, which this projects aims to achieve. This work can have a lasting impact on better energy utilization in the mobile environment.This project seeks to develop models that capture the power-performance tradeoffs in WiFi-capable mobile devices and the impact of different features of the next generation WiFi standards on these tradeoffs. The models are to be developed based on extensive measurement studies using different mobile devices in a variety of scenarios. Further, it seeks to build realistic power models that consider diverse components of the system and their interactions, beyond just the CPU, as well as models for power-performance tradeoffs at the system level. Power analysis of the computational elements and peripherals will be developed, with considerations to varying factors that affect the power consumption, such as the applications, environment, and usage profile, through power modeling and measurements. The results will then be integrated with the WiFi models resulting in a holistic power model and profile. The developed models will guide the design of novel power management, rate adaptation, and WLAN management protocols that will allow mobile devices to realize more of their potential, while minimizing the power consumption and the impact to other WLAN clients. The project will bring increased awareness of energy consumption issues in modern mobile devices through outreach activities.