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Unformatted text preview: Improving Energy Efficiency of Location Sensing on Smartphones Zhenyun Zhuang 1 ∗ Kyu-Han Kim 2 † Jatinder Pal Singh 2 1 Georgia Institute of Technology, Atlanta, GA 30332, U.S.A. 2 Deutsche Telekom R&D Laboratories USA, Los Altos, CA 94022, U.S.A. [email protected], [email protected], [email protected] ABSTRACT Location-based applications have become increasingly popular on smartphones over the past years. The active use of these applica- tions can however cause device battery drain owing to their power- intensive location-sensing operations. This paper presents an adap- tive location-sensing framework that significantly improves the en- ergy efficiency of smartphones running location-based applications. The underlying design principles of the proposed framework in- volve substitution, suppression, piggybacking, and adaptation of applications’ location-sensing requests to conserve energy. We im- plement these design principles on Android-based smartphones as a middleware. Our evaluation results show that the design principles reduce the usage of the power-intensive GPS (Global Positioning System) by up to 98% and improve battery life by up to 75%. Categories and Subject Descriptors C.3.3 [ Special-Purpose and Application-Based Systems ]: Real- Time and Embedded Systems General Terms Design, Experimentation, Measurement, Performance, Algorithms Keywords Location Sensing, Energy Efficiency, Location-Based Applications, Smartphone. 1. INTRODUCTION With the increasing pervasiveness of smartphones over the past years, several Location-Based Applications (LBAs) have been adopted by mobile users for always-on contact for social-networking, busi- nesses needs, and entertainment. Some instances of currently pop- ular LBAs include mobile social networking [2, 3, 9, 10], health- care , local traffic [7,22,23,29,36], and local restaurants . ∗ Zhenyun Zhuang was an intern at Deutsche Telekom R&D Lab USA while this research was conducted. † To whom correspondence should be addressed. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. MobiSys’10, June 15–18, 2010, San Francisco, California, USA. Copyright 2010 ACM 978-1-60558-985-5/10/06 ...$10.00. In spite of the increase in processing power, feature-set, and sensing capabilities, the smartphones continue to suffer from bat- tery life limitation, which hinders the active utilization of LBAs....
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