Energy Efficient Mobile Operating Systems

Energy efficiency has become one of the most burning issue in today's mobile computing .In today's era mobile phones has become one of the most important part in one's life. When we are talking about mobile computing, we are not stick to one application. But we are using multiple applications at a time and at the same time we have to maintain the energy efficiency of the mobile computers to provide better performance. So in this paper I have tried to use a technique to improve energy efficiency for multiple applications for mobile computers by giving a priority based technique to each of the application which we are running and less consumption of battery for those applications.

2012 The First IEEE Workshop on Enabling Technologies for Smartphone and Internet of Things (ETSIoT), 2012

Saving power of Android enabled devices have become a significant issue with 400,000 such devices being activated daily. Android smartphones and tablets offer several power hungry hardware components and the app developers are exploiting these components at disposal to provide revolutionary user experience. But the battery life has not increased at the same pace to support the power demand. Thus many researches have been carried out to investigate how to minimize the power consumption in smartphones. This paper reports four different research themes towards the reduction of smartphone power consumption. Efforts have been made to survey Android power saving apps available in Google play Apps store as the basis to find out different power saving approaches, operations and limitations. Then we present four different avenues to prolong the batter life of Android devices. The first two approaches include usage pattern analysis to generate power saving profiles. The advantage being that the power saving profiles are customized to actual user behavior. Integrating a photovoltaic film on top of the smartphone and tablet touch screen to generate electricity is also mentioned. The usage pattern based power saving profile generation has several privacy concerns which are discussed and countermeasures are proposed. Some emerging security attacks are also briefed.

Energy efficient system design is becoming increasingly important with the proliferation of portable, battery-operated appliances such as laptops, Personal Digital Assistants (PDAs) and cellular phones. Numerous dedicated hardware approaches for energy minimization have been proposed while software energy efficiency has been relatively unexplored. Since it is the software that drives the hardware, decisions taken during software design can have a significant impact on system energy consumption. This thesis explores avenues for improving system energy efficiency from application level to the operating system level. The embedded operating system can have a significant impact on system energy by performing dynamic power management both in the active and passive states of the device. Software controlled active power management techniques using dynamic voltage and frequency scaling have been explored. Efficient workload prediction strategies have been developed that enable just-in-time computation. An algorithm for efficient realtime operating system task scheduling has also been developed that minimizes energy consumption. Portable systems spend a lot of time in sleep mode. Idle power management strategies have been developed that consider the effect of leakage and duty-cycle on system lifetime. A hierarchical shutdown approach for systems characterized multiple sleep states has been proposed. Although the proposed techniques are quite general, their applicability and utility have been demonstrated using the MIT µAMPS wireless sensor node an example system wherever possible. To quantify software energy consumption, an estimation framework has been developed based on experiments on the StrongARM and Hitachi processors. The software energy profiling tool is available on-line. Finally, in energy constrained systems, we would like to have the ability to trade-off quality of service for extended battery life. A scalable approach to application development has been demonstrated that allows energy quality trade-offs.

2016

Mobile devices such as smart phones, have gained enormous popularity over the last few years. Smart phones are now capable of supporting a large number of applications, many of which demand an ever increasing computational power. However, Battery life of mobile devices remains a key limiting factor in the design of mobile applications. This paper firstly emphasizes on reviewing various techniques used to enhance battery life of smart phones. At the end, on the basis of comparative studies, suggestions are given to extend the energy efficiency of smart phones.

2011

Recent trends, motivated by user preferences towards carrying smaller and more complex devices, have focused on integrating different usercentric applications in a single general-purpose mobile hand-held device. Hence, Laptops, smart phones and PDAs are rapidly replacing computers as the most commonly-used Internet-access devices. This has resulted in much higher energy consumption and consequently, a reduced battery life of a wireless device. In fact, the biggest problem today in the mobile world is that they are battery driven and the battery technologies are not matching the required energy demand. This chapter focuses on different energy consuming components in the high-end wireless devices, with specific emphasis on adaptive energy efficient display and decoding mechanisms.

Mehran University Research Journal of Engineering and Technology, 2020

Battery driven computing devices such as laptops and cellular phones have become a necessity in this era. Mobile applications help us in daily life activities and with the rise of Internet of Things (IoT) new opportunities are open up to automate different task. However, batteries have their own limitations such as weight, cost, and size. Multiple applications and background processes running in parallel easily drain phone’s battery within 24 hours consequently annoying users by limited battery capacity. Repeated charge, recharge cycles steadily diminish the full capacity of batteries resulting in the immense decreased performance of the device. Therefore, mobile devices and mobile applications are in great need of energy-aware modules. In this paper, a survey is performed to identify the needs of the mobile user in the context of energy consumption problem. The results of survey lead authors to propose a middle layer energy aware framework to address this issue. The proposed framew...

One constant in computing which is true also for mobile computing is the continue requirement for greater performance. Every performance advance in mobile processors leads to another level of greater performance demands from newest mobile applications. However, on battery powered devices performance is strictly limited by the battery capacity, therefore energy efficient applications and systems have to be developed. The power consumption problem of mobile systems is in general a very complex one and remained very actual for quite a long time. In this paper we aim to define a software execution framework for mobile systems in order to characterize the power consumption profile of multi-threading mobile applications. Study results for different thread libraries, multi-core processors and multithreaded parallelized applications are also presented.

cl.cam.ac.uk

The integration of multiple hardware components available in current smartphones improves their functionality but reduces their battery life to few hours of operation. Despite the positive improvements achieved by hardware and operating system vendors to make mobile platforms more energy eff cient at various levels, we believe that an eff cient power management in mobile devices is compromised by strict layering of the system caused by complex mobile business models that mitigates against cross-layering optimisations. However, there is a lot of room for improvement in the operating system. This paper presents ErdOS, a user-centered energy-aware operating system that extends the battery life of mobile handsets by managing resources proactively and by exploiting opportunistic access to resources in nearby devices using social connections between users.

International Journal of Computer Applications, 2010

Energy Consumption has become a critical issue for all kinds of computer systems, data centers and servers. Their demand for 24X7 connectivity and availability needs huge power in quantity of megawatts. The performance of microprocessors has been improving at an exponential rate and this trend is continuing from past two decades. However, increased performance does not come for free. One of the most important consequences of higher performance has been a dramatic increase in power consumption. For example, Intel 386 processor initially consumed about 2 Watts of energy; a Pentium 4 can use as much as 55 Watts. Various algorithms have been developed with respect to present needs and situations, but no one thinks of the future. This paper discusses the novel approach to reduce the power consumption of the operating system and gives an entirely new dimension to look in. We have given the name "green" to that operating system, as its more energy efficient. Our paper will also explore the future power issues of the operating system and the holistic approach to tackle them, in the form of an entirely new operating system viz. Green OS.

2010

Mobile consumer-electronics devices, especially phones, are powered from batteries which are limited in size and therefore capacity. This implies that managing energy well is paramount in such devices.