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Paper Abstract and Keywords
Presentation 2021-05-10 11:20
Extensions of Indoor Localization System Using IEEE802.15.4 Protocol for Multiple Users
Kazushi Hamazaki, Pradini Puspitaningayu, Nobuo Hunabiki, Minoru Kuribayashi (Okayama Univ) LOIS2021-3
Abstract (in Japanese) (See Japanese page) 
(in English) For the low-cost, small-size, and long-life system, we have developed the fingerprint-based indoor localization system (FB-ILS) using the IEEE802.15.4 protocol that has been used for low-speed short-range wireless communications. By limiting the detection resolution to one room, this FB-ILS system is intended to achieve the high accuracy. The current FB-ILS can detect only one user location using one transmitter. However, it is necessary to detect the locations of multiple users at the same time. In this study, we extend the FB-ILS to afford multiple transmitters, by 1) extending the room detection program in the system, 2) reducing packet losses due to the contentions among the packets from multiple transmitters at each receiver, and 3) avoiding misdetections due to the signal fluctuations caused by the interferences between multiple radio signals from multiple transmitters. For evaluations, we implemented the extended testbed system, and conducted experiments using up to 10 transmitters at the third floor of #2 Engineering Building in Okayama University. The results confirm the effectives of the extended system
Keyword (in Japanese) (See Japanese page) 
(in English) indoor localization system / IEEE802.15.4 / multiple users / packet loss / interference / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 12, LOIS2021-3, pp. 13-18, May 2021.
Paper # LOIS2021-3 
Date of Issue 2021-05-03 (LOIS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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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 LOIS IPSJ-SPT IPSJ-GN  
Conference Date 2021-05-10 - 2021-05-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To LOIS 
Conference Code 2021-05-LOIS-SPT-GN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Extensions of Indoor Localization System Using IEEE802.15.4 Protocol for Multiple Users 
Sub Title (in English)  
Keyword(1) indoor localization system  
Keyword(2) IEEE802.15.4  
Keyword(3) multiple users  
Keyword(4) packet loss  
Keyword(5) interference  
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1st Author's Name Kazushi Hamazaki  
1st Author's Affiliation Okayama University (Okayama Univ)
2nd Author's Name Pradini Puspitaningayu  
2nd Author's Affiliation Okayama University (Okayama Univ)
3rd Author's Name Nobuo Hunabiki  
3rd Author's Affiliation Okayama University (Okayama Univ)
4th Author's Name Minoru Kuribayashi  
4th Author's Affiliation Okayama University (Okayama Univ)
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Speaker Author-1 
Date Time 2021-05-10 11:20:00 
Presentation Time 25 minutes 
Registration for LOIS 
Paper # LOIS2021-3 
Volume (vol) vol.121 
Number (no) no.12 
Page pp.13-18 
#Pages
Date of Issue 2021-05-03 (LOIS) 


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