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Abstract - Extend the battery life of mobile handsets at different levels such as operating system, wireless technologies and applications is the aim of the most hardware manufacturers and OS designers, so designing more energy efficient applications and operating systems is the best way to solve this problem, In this paper, we aim is to provide a summary of techniques employed in mobile computer and especially smartphones operating systems that can reduce the power consumption of today's mobile computing devices.
Keywords: Smartphones, Power management, Operating system.
I. INTRODUCTION
Smartphones are quickly becoming the main computing and (data) communication platform, IDC (International Data Corporation-Worldwide Quarterly Mobile Phone Tracker) said 157.8 million smartphones sold worldwide in Q4 2011, bringing the total for the year to 491.4 million units [1].
Smartphone are as powerful as the PCs. Therefore, they are perfectly suitable to become the first real-life platforms for ubiquitous computing. For instance, they can be programmed to run location-aware applications that provide people with real-time information relevant to their current places. Deploying such devices in our daily life, however, requires a good understanding of their power requirements. Also the increasing popularity of power-hungry applications that take advantage of the smartphones resources and the diverse range of wireless interfaces and sensors can reduce the battery life of smartphones.
With this new paradigm however come new challenges in computer operating systems development, these challenges include many items such as frequent network disconnections, communications bandwidth limitations, resource restrictions, and power limitations.
In this paper we analyse general solutions for energy consumption on mobile devices and especially smartphones, concentrate on techniques can be employed in mobile computer operating systems that can reduce the power consumption of today's mobile computing devices.
The paper is organized as follows: In Section II we present Energy Management techniques in Smartphones operating systems, and finally Section III concludes the paper.
II. Energy Management in Smartphones OS
Energy efficiency is recognized as a paramount property of any mobile device, in particular for smartphones. However , applications and operating system both are responsible for energy management .At the operating system level, the main idea is to reduce energy consumption by unifying resource and energy management, however understanding of how resources are demanded by users and applications in...