Download or read book Measurement and Reduction of Power Consumption in Mobile Phones written by Jonathan Adam Lawton and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, consumer adoption of smartphones has been rising rapidly, increasing the demand for high performance mobile devices with long battery life. While the capabilities of mobile systems-on-chip have scaled impressively, battery technology has seen only a modest improvement. In order to address this gap, new power management schemes are needed for the mobile environment. This work proposes adding real-time hardware power measurement to smartphones in order to enable more advanced power management algorithms. The theoretical basis and power cost of making system-level power measurements is explored, an actual power measurement system implemented and characterized, and a number of power management algorithms implemented and evaluated. It is found that a suitable power measurement system could consume as little as 4 [mu]W based on theoretical limits, and that real time power data can be used to control system clock rate to adhere to target power consumption.
Download or read book Measurements of Power Consumption in Smartphones written by Sai Suren Kumar Kasireddy and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Power Consumption and Energy Efficiency of Telecommunications Networks written by Kerry James Hinton and published by CRC Press. This book was released on 2021-10-29 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the technical foundations and tools for estimating the power consumption of internet networks and services, including a detailed description of how these models are constructed and applied. Modeling the Power Consumption and Energy Efficiency of Telecommunications Networks can be used to gain insight into the construction of mathematical models that provide realistic estimates of the power consumption of internet networks and services. This knowledge enables forecasting the energy footprint of future networks and services to integrate sustainability and environmental considerations into network planning and design. FEATURES Provides the motivation for developing mathematical models for telecommunications network and service power consumption and energy efficiency modeling Presents factors impacting overall network and service power consumption Discusses the types of network equipment and their power consumption profiles Reviews the basics of power modeling, including network segmentation, traffic forecasting, top-down and bottom-up models, wired and wireless networks, data centers and servers Explores the application of energy efficiency metrics for equipment, networks, and services This book is aimed at students and technologists as well as technology managers and policy makers. This book will be of value to any organization that wishes to estimate the energy footprint of the use of information and communications technologies. This book can also be integrated into a course on the sustainability of information and communications technologies.
Download or read book Reducing 3rd Generation Energy Consumption on Mobile Devices written by Shuo Deng and published by . This book was released on 2012 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 3G wireless interface is a significant contributor to battery drain on mobile devices. This paper describes the design, implementation, and experimental evaluation of methods to reduce the energy consumption of the 3G radio interface. The idea is to put the radio in its "Low-power idle" state when no application is likely to need the network for some duration of time in the future. We present two techniques, one to determine when to change the radio's state from "Active" to "Low-power idle", and the other to change the radio's state from "Low-power idle" to "Active". The technique for switching to Low-power idle mode is well-suited for the emerging "fast dormancy" [3, 4] primitive that will soon be common on smartphones. We demonstrate using an implementation and a trace-driven evaluation based on the measurement and trace collected from HTC GI and Samsung Nexus S phones over various combinations of seven different background applications that our methods reduce the energy consumption of the 3G interface by 36% on average compared to the currently deployed scheme on the T-mobile network. In addition, if applications are able to tolerate a delay of a few seconds when they initiate a session, our methods reduce energy consumption by 52% on average, with a mean increase in delay of 6.46 seconds.
Download or read book Green Mobile Devices and Networks written by Hrishikesh Venkataraman and published by CRC Press. This book was released on 2016-04-19 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: While battery capacity is often insufficient to keep up with the power-demanding features of the latest mobile devices, powering the functional advancement of wireless devices requires a revolution in the concept of battery life and recharge capability. Future handheld devices and wireless networks should be able to recharge themselves automaticall
Download or read book Smartphone Energy Consumption written by Sasu Tarkoma and published by Cambridge University Press. This book was released on 2014-08-07 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an ever-increasing number of applications available for mobile devices, battery life is becoming a critical factor in user satisfaction. This practical guide provides you with the key measurement, modeling, and analytical tools needed to optimize battery life by developing energy-aware and energy-efficient systems and applications. As well as the necessary theoretical background and results of the field, this hands-on book also provides real-world examples, practical guidance on assessing and optimizing energy consumption, and details of prototypes and possible future trends. Uniquely, you will learn about energy optimization of both hardware and software in one book, enabling you to get the most from the available battery power. Covering experimental system design and implementation, the book supports assignment-based courses with a laboratory component, making it an ideal textbook for graduate students. It is also a perfect guidebook for software engineers and systems architects working in industry.
Download or read book Battery Management Systems written by H.J. Bergveld and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Battery Management Systems - Design by Modelling describes the design of Battery Management Systems (BMS) with the aid of simulation methods. The basic tasks of BMS are to ensure optimum use of the energy stored in the battery (pack) that powers a portable device and to prevent damage inflicted on the battery (pack). This becomes increasingly important due to the larger power consumption associated with added features to portable devices on the one hand and the demand for longer run times on the other hand. In addition to explaining the general principles of BMS tasks such as charging algorithms and State-of-Charge (SoC) indication methods, the book also covers real-life examples of BMS functionality of practical portable devices such as shavers and cellular phones. Simulations offer the advantage over measurements that less time is needed to gain knowledge of a battery's behaviour in interaction with other parts in a portable device under a wide variety of conditions. This knowledge can be used to improve the design of a BMS, even before a prototype of the portable device has been built. The battery is the central part of a BMS and good simulation models that can be used to improve the BMS design were previously unavailable. Therefore, a large part of the book is devoted to the construction of simulation models for rechargeable batteries. With the aid of several illustrations it is shown that design improvements can indeed be realized with the presented battery models. Examples include an improved charging algorithm that was elaborated in simulations and verified in practice and a new SoC indication system that was developed showing promising results. The contents of Battery Management Systems - Design by Modelling is based on years of research performed at the Philips Research Laboratories. The combination of basic and detailed descriptions of battery behaviour both in chemical and electrical terms makes this book truly multidisciplinary. It can therefore be read both by people with an (electro)chemical and an electrical engineering background.
Download or read book Mobile and Ubiquitous Systems Computing Networking and Services written by Alessandro Puiatti and published by Springer. This book was released on 2012-05-24 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-conference proceedings of the 8th International ICST Conference on Mobile and Ubiquitous Systems: Computing, Networking, and Services, MobiQuitous 2011, held in Copenhagen, Denmark, in December 2011. The 34 revised full papers presented were carefully reviewed and selected from numerous submissions. They cover a wide range of topics ranging from localization and tracking, search and discovery, classification and profiling, context awareness and architecture, location and activity recognition as well as a best paper session, an industry track, and poster and demo papers.
Download or read book Measuring the Power Consumption of Smartphones written by Tyler Manning-Dahan and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controlling Energy Demand in Mobile Computing Systems written by Carla Schlatter Ellis and published by Morgan & Claypool Publishers. This book was released on 2007-06-01 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lecture provides an introduction to the problem of managing the energy demand of mobile devices. Reducing energy consumption, primarily with the goal of extending the lifetime of battery-powered devices, has emerged as a fundamental challenge in mobile computing and wireless communication. The focus of this lecture is on a systems approach where software techniques exploit state-of-the-art architectural features rather than relying only upon advances in lower-power circuitry or the slow improvements in battery technology to solve the problem. Fortunately, there are many opportunities to innovate on managing energy demand at the higher levels of a mobile system. Increasingly, device components offer low power modes that enable software to directly affect the energy consumption of the system. The challenge is to design resource management policies to effectively use these capabilities. The lecture begins by providing the necessary foundations, including basic energy terminology and widely accepted metrics, system models of how power is consumed by a device, and measurement methods and tools available for experimental evaluation. For components that offer low power modes, management policies are considered that address the questions of when to power down to a lower power state and when to power back up to a higher power state. These policies rely on detecting periods when the device is idle as well as techniques for modifying the access patterns of a workload to increase opportunities for power state transitions. For processors with frequency and voltage scaling capabilities, dynamic scheduling policies are developed that determine points during execution when those settings can be changed without harming quality of service constraints. The interactions and tradeoffs among the power management policies of multiple devices are discussed. We explore how the effective power management on one component of a system may have either a positive or negative impact on overall energy consumption or on the design of policies for another component. The important role that application-level involvement may play in energy management is described, with several examples of cross-layer cooperation. Application program interfaces (APIs) that provide information flow across the application-OS boundary are valuable tools in encouraging development of energy-aware applications. Finally, we summarize the key lessons of this lecture and discuss future directions in managing energy demand.
Download or read book Measurement of Energy Consumption in Wireless LANs and Radio Frequency Identification Systems written by Suresh Ramamoorthy and published by . This book was released on 2011 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: As mobile hand-held devices such as cell phones and personal digital assistants are battery operated, it is important to minimize their energy consumption. The limited lifetime of the battery is always a problem for all portable devices. Although battery technology has undergone a massive development over the years, it has not kept pace with other technologies. Therefore, research needs to be done to use the limited life time of the battery in an efficient way. With developments in science and technology, the power consumption of portable devices has been brought down due to the decrease in the size of the display and optimization of components. The trend toward smaller sizes of portable devices involved is responsible for the wireless network interface consuming a larger share of overall power consumption of a system. In order to optimize the power consumption of wireless communication, we should be aware of the power consumption pattern. Accurate energy models are required for designing and testing energy aware protocols. The accuracy of these energy models and their contribution toward energy aware protocol design depend on the accuracy and availability of sufficient data about power consumption of these devices. This work contributes to the building of such a power consumption database through a series of measurements of currently available Wireless Network Interface Cards (WNIC) and Radio Frequency Identification Devices (RFID). These measurements also help in understanding the behavior of these technologies at the lower levels of the network stack.
Download or read book Advances in Communications Computing Electronics Networks Robotics and Security Volume 12 written by Paul Dowland and published by Lulu.com. This book was released on 2016-07 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the twelfth in a series presenting research papers arising from MSc/MRes research projects undertaken by students of the School of Computing and Mathematics at Plymouth University. The publications in this volume are based upon research projects that were undertaken during the 2013/14 academic year. A total of 17 papers are presented, covering many aspects of modern networking and communication technology, including security, mobility, coding schemes and quality measurement. The expanded topic coverage compared to earlier volumes in this series reflects the broadening of our range of MSc programmes. Specifically contributing programmes are: Communications Engineering and Signal Processing, Computer and Information Security, Computer Science, Computing, Electrical and Electronic Engineering, Network Systems Engineering, and Robotics.
Download or read book 4g Mobile and Wireless Communications Technologies written by Sofoklis Kyriazakos and published by CRC Press. This book was released on 2022-09-01 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile and wireless communications are moving towards a new era that will be characterized by the seamless collaboration of heterogeneous systems, the need for high speed communications while on the move and for advanced services with quality guarantees. Recent market research studies show that most of the traffic in the future wireless networks will be produced by mobile multimedia services which are expected to proliferate by the year 2010. On the other hand mobile and wireless communications technology is becoming more and more important in developing countries where people demand fast deployment and low cost for broadband wireless internet services.The objective of this volume is to gather research and development on topics shaping the fourth generation (4G) in mobile and wireless communications and reveal the key trends and enabling technologies for 4G. We envisage 4G wireless communication systems as IP based solution providing integrated services (voice, data, multimedia) regardless of time and end-users? location. 4G technologies will manifest the benefits of the wireless and wired technologies convergence, through enabling a wide range of innovative (both indoor and outdoor) applications. 4G applications will feature premium quality, high security and an affordable cost. The vision, though fantastic, is associated with a host of technical and technological challenges.A great deal of the latter are discussed in the articles of this volume, which aims at providing insights on the research issues and solutions that are directly associated with leading edge 4G technologies and services.Taking into account recent developments in the world of wireless communications we have given emphasis to cover all these technologies and aspects that are considered as cornerstones for achieving the goals set for 4G and that will further boost research and development of next-generation mobile communications.
Download or read book Measurement Instrumentation and Sensors Handbook written by John G. Webster and published by CRC Press. This book was released on 2017-12-19 with total page 1921 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Edition of the bestselling Measurement, Instrumentation, and Sensors Handbook brings together all aspects of the design and implementation of measurement, instrumentation, and sensors. Reflecting the current state of the art, it describes the use of instruments and techniques for performing practical measurements in engineering, physics, chemistry, and the life sciences and discusses processing systems, automatic data acquisition, reduction and analysis, operation characteristics, accuracy, errors, calibrations, and the incorporation of standards for control purposes. Organized according to measurement problem, the Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement volume of the Second Edition: Contains contributions from field experts, new chapters, and updates to all 98 existing chapters Covers sensors and sensor technology, time and frequency, signal processing, displays and recorders, and optical, medical, biomedical, health, environmental, electrical, electromagnetic, and chemical variables A concise and useful reference for engineers, scientists, academic faculty, students, designers, managers, and industry professionals involved in instrumentation and measurement research and development, Measurement, Instrumentation, and Sensors Handbook, Second Edition: Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement provides readers with a greater understanding of advanced applications.
Download or read book Low Power Analog Techniques Sensors for Mobile Devices and Energy Efficient Amplifiers written by Kofi A. A. Makinwa and published by Springer. This book was released on 2019-01-28 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the 18 invited tutorials presented during the 27th workshop on Advances in Analog Circuit Design. Expert designers from both industry and academia present readers with information about a variety of topics at the frontiers of analog circuit design, including the design of analog circuits in power-constrained applications, CMOS-compatible sensors for mobile devices and energy-efficient amplifiers and drivers. For anyone involved in the design of analog circuits, this book will serve as a valuable guide to the current state-of-the-art. Provides a state-of-the-art reference in analog circuit design, written by experts from industry and academia; Presents material in a tutorial-based format; Covers the design of analog circuits in power-constrained applications, CMOS-compatible sensors for mobile devices and energy-efficient amplifiers and drivers.
Download or read book Modern Software Engineering Methodologies for Mobile and Cloud Environments written by Rosado da Cruz, António Miguel and published by IGI Global. This book was released on 2016-01-20 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: As technology continues to evolve, the popularity of mobile computing has become inherent within today’s society. With the majority of the population using some form of mobile device, it has become increasingly important to develop more efficient cloud platforms. Modern Software Engineering Methodologies for Mobile and Cloud Environments investigates emergent trends and research on innovative software platforms in mobile and cloud computing. Featuring state-of-the-art software engineering methods, as well as new techniques being utilized in the field, this book is a pivotal reference source for professionals, researchers, practitioners, and students interested in mobile and cloud environments.
Download or read book Official Gazette of the United States Patent and Trademark Office written by United States. Patent and Trademark Office and published by . This book was released on 2001 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
