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Investigating the energy use of smart phones

Andrew Rice ( University of Cambridge )

More efficient use of energy would mean your smart phone could be smaller, cheaper or simply recharged less frequently. This talk will use the efficiency of sending data over a wireless network as an example. Our experimental setup embeds synchronization information in the energy trace of the phone to allow us to overlay information from various capture sources. I will explain this process and show the results so far.  We have found numerous factors affecting the energy consumption of this example and we are now looking to develop probabilistic models which we can compose together to capture their interactions. The benefit of any optimizations derived from our controlled experiments will depend on real-world usage of phone handsets. In the second part of the talk I will describe our efforts using DeviceAnalyzer to build a publicly available data set of handset usage. Using the data we have collected over a 2 year period from over 10,000 users I will look at what determining factors of energy consumption we can measure or infer and highlight the areas for future work.

Speaker bio

Andrew Rice is a Lecturer in the Computer Laboratory and a Fellow of Queens' College at the University of Cambridge. His research focus is in the use of smart phones as a computing platform and currently considers issues of understanding modern phone use and associated energy consumption. He works within the Computing for the Future of the Planet framework, investigating the contributions that computer science can make in solving issues such as over-population, global energy use and climate change. Find him online at http://www.cl.cam.ac.uk/~acr31

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