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Exploiting Energy Awareness in Mobile Communication
Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, The Institute of Technology. (Real-Time Systems Laboratory)
2013 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

Although evolving mobile technologies bring millions of users closer to the vision of information anywhere-anytime, device battery depletions hamper the quality of experience to a great extent. The massive explosion of mobile applications with the ensuing data exchange over the cellular infrastructure is not only a blessing to the mobile user, but also has a price in terms of rapid discharge of the device battery. Wireless communication is a large contributor to the energy consumption. Thus, the current call for energy economy in mobile devices poses the challenge of reducing the energy consumption of wireless data transmissions at the user end by developing energy-efficient communication.

This thesis addresses the energy efficiency of data transmission at the user end in the context of cellular networks. We argue that the design of energy-efficient solutions starts by energy awareness and propose EnergyBox, a parametrised tool that enables accurate and repeatable energy quantification at the user end using real data traffic traces as input. EnergyBox abstracts the underlying states for operation of the wireless interfaces and allows to estimate the energy consumption for different operator settings and device characteristics.

Next, we devise an energy-efficient algorithm that schedules the packet transmissions at the user end based on the knowledge of the network parameters that impact the handset energy consumption. The solution focuses on the characteristics of a given traffic class with the lowest quality of service requirements. The cost of running the solution itself is studied showing that the proposed cross-layer scheduler uses a small amount of energy to significantly extend the battery lifetime at the cost of some added latency. 

Finally, the benefit of employing EnergyBox to systematically study the different design choices that developers face with respect to data transmissions of applications is shown in the context of location sharing services and instant messaging applications. The results show that quantifying energy consumption of communication patterns, protocols, and data formats can aid the design of tailor-made solutions with a significantly smaller energy footprint. 

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2013. , 127 p.
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1627
Keyword [en]
wireless transmission energy, energy consumption, mobile devices, power measurements, application energy, data pattern, trace-based simulation
National Category
Communication Systems Telecommunications Computer Systems Communication Systems
URN: urn:nbn:se:liu:diva-98656DOI: 10.3384/lic.diva-98656ISBN: 978-91-7519-475-2 (print)OAI: diva2:663464
2013-12-03, John von Neumann, Hus B, Campus Valla, Linköpings universtet, Linköping, 13:15 (English)
Available from: 2013-11-14 Created: 2013-10-10 Last updated: 2013-11-14Bibliographically approved

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Vergara Alonso, Ekhiotz Jon
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