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Paper Abstract and Keywords
Presentation 2015-06-19 14:50
BLE beacons' application to guidance systems for the visually impaired
Kazushi Sasaki, Toru Nakano (Niigata Univ.), Daisuke Wakatsuki, Makoto Kobayashi (Tsukuba Univ. of Tech.), Kentaro Nishimori, Hideo Makino (Niigata Univ.) PRMU2015-59 SP2015-28 WIT2015-28
Abstract (in Japanese) (See Japanese page) 
(in English) The present work examines an indoor, BLE beacon-based guidance systems that, when completed, holds the promise of truly accurate geographical positioning. At first, RSSI (Received Signal Strength Indication) is measured in smartphones, and the distance between the beacon and smartphone is estimated, based on its strength. Regarding signal strength, the degree of positioning error depends on the circumstances resulting from microwave reflection, or scattering. To prevent such interferences, we place the BLE beacon in a micro wave absorbing material to form a directional transmitter.
In our experiments, we first measured signal strength in an anechoic chamber, to prevent interference; this according to the distance between the beacon and the smartphone; (1m~ 5 m). We then, repeated the measurements in a laboratory setting. Results were compared with a mathematical estimation formula. As a result, the measured values ware matched with the formula from up to 3m. Moreover, when using the absorbent material, the decrease in signal strength was greater than 12.5dBm, when the beacons were placed 2 meters apart.
Keyword (in Japanese) (See Japanese page) 
(in English) Guidance systems / BLE / RSSI / Reflection / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 100, WIT2015-28, pp. 157-162, June 2015.
Paper # WIT2015-28 
Date of Issue 2015-06-11 (PRMU, SP, WIT) 
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)
Download PDF PRMU2015-59 SP2015-28 WIT2015-28

Conference Information
Committee WIT SP ASJ-H PRMU  
Conference Date 2015-06-18 - 2015-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WIT 
Conference Code 2015-06-WIT-SP-H-PRMU 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) BLE beacons' application to guidance systems for the visually impaired 
Sub Title (in English)  
Keyword(1) Guidance systems  
Keyword(2) BLE  
Keyword(3) RSSI  
Keyword(4) Reflection  
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1st Author's Name Kazushi Sasaki  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Toru Nakano  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Daisuke Wakatsuki  
3rd Author's Affiliation Tsukuba University of Technology (Tsukuba Univ. of Tech.)
4th Author's Name Makoto Kobayashi  
4th Author's Affiliation Tsukuba University of Technology (Tsukuba Univ. of Tech.)
5th Author's Name Kentaro Nishimori  
5th Author's Affiliation Niigata University (Niigata Univ.)
6th Author's Name Hideo Makino  
6th Author's Affiliation Niigata University (Niigata Univ.)
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Speaker Author-1 
Date Time 2015-06-19 14:50:00 
Presentation Time 25 minutes 
Registration for WIT 
Paper # PRMU2015-59, SP2015-28, WIT2015-28 
Volume (vol) vol.115 
Number (no) no.98(PRMU), no.99(SP), no.100(WIT) 
Page pp.157-162 
#Pages 6 
Date of Issue 2015-06-11 (PRMU, SP, WIT) 

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