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Paper Abstract and Keywords
Presentation 2015-01-26 14:20
Implementation and Power Consumptiopn Analysis of Sensor-fused Energy-efficient Geofencing for Smartphones
Tomohiro Nakagawa, Ken Ohta, Hiroshi Inamura (NTT DOCOMO), Makoto Suzuki, Hiroyuki Morikawa (The Univ. of Tokyo) MoNA2014-67
Abstract (in Japanese) (See Japanese page) 
(in English) In order to realize energy-efficient geofencing, which enables automatic detection of user’s entrance to POIs, it is required to reduce battery consumption while maintaining detection accuracy and delay. In this paper, with the aim of clarifying system performance under real environments, which is hard to model in rigorous fashion in computer simulation, we evaluate the proposed geofencing system implemented on Android-based smartphone through field tests. For the purpose of detailed analysis of the system, we compare hardware-component level battery consumption breakdown among different settings that covers every combination of geofencing component functions, such as movement detection, variable interval positioning, and positioning method switching. The evaluation results show that movement detection and variable interval positioning cause serious entrance detection delay when they are executed with sequential erroneous positioning results of WiFi-based positioning. It is also confirmed that false negative and false positive of movement detection can cause detection delay, because they block position measurements at appropriate timings.
Keyword (in Japanese) (See Japanese page) 
(in English) Energy-efficient geofencing / Power consumption analysis / Smartphone / / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 417, MoNA2014-67, pp. 53-58, Jan. 2015.
Paper # MoNA2014-67 
Date of Issue 2015-01-19 (MoNA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee MICT ASN MoNA  
Conference Date 2015-01-26 - 2015-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Nanki Shirahama 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ambient intelligence, ICT for Medical, Healthcare and Sports, etc 
Paper Information
Registration To MoNA 
Conference Code 2015-01-MICT-ASN-MoNA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Implementation and Power Consumptiopn Analysis of Sensor-fused Energy-efficient Geofencing for Smartphones 
Sub Title (in English)  
Keyword(1) Energy-efficient geofencing  
Keyword(2) Power consumption analysis  
Keyword(3) Smartphone  
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1st Author's Name Tomohiro Nakagawa  
1st Author's Affiliation NTT DOCOMO, Inc. (NTT DOCOMO)
2nd Author's Name Ken Ohta  
2nd Author's Affiliation NTT DOCOMO, Inc. (NTT DOCOMO)
3rd Author's Name Hiroshi Inamura  
3rd Author's Affiliation NTT DOCOMO, Inc. (NTT DOCOMO)
4th Author's Name Makoto Suzuki  
4th Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
5th Author's Name Hiroyuki Morikawa  
5th Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
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Speaker Author-1 
Date Time 2015-01-26 14:20:00 
Presentation Time 25 minutes 
Registration for MoNA 
Paper # MoNA2014-67 
Volume (vol) vol.114 
Number (no) no.417 
Page pp.53-58 
#Pages 6 
Date of Issue 2015-01-19 (MoNA) 

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