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Paper Abstract and Keywords
Presentation 2018-01-30 16:05
LED-to-Camera Communication Mechanism Based on Flash Blinks against Inter-Frame Gaps and Frame Drops
Yuki Hokazono, Aoi Koizuka, Makoto Suzuki, Yoshiaki Narusue, Hiroyuki Morikawa (Tokyo Univ.) ASN2017-95
Abstract (in Japanese) (See Japanese page) 
(in English) LED-to-camera communication for smartphones is promising to enable low-cost, small-size, and intuitive data access to IoT devices. For fast and reliable communication under the rolling shutter effect, it is necessary to deal with packet losses due to inter-frame gaps and frame drops. In this paper, we present IoTorch, a fast and reliable LED-to-camera communication which efficiently prevents these packet losses. IoTorch consists of two core mechanisms: 1) a packet retransmission strategy focusing on periodicity of inter-frame gaps, and 2) an ACK mechanism against frame drops using a smartphone's built-in flash focusing on its delay characteristic. In addition, IoTorch is capable of low-power implementation by data transmission trigger using flash. The experimental results using multiple smartphone models show that IoTorch achieves more than 14x throughput of previous works without data losses.
Keyword (in Japanese) (See Japanese page) 
(in English) LED-to-camera communication for smartphones / Rolling shutter effect / Visible light communication / / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 426, ASN2017-95, pp. 71-76, Jan. 2018.
Paper # ASN2017-95 
Date of Issue 2018-01-23 (ASN) 
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 ASN  
Conference Date 2018-01-30 - 2018-01-31 
Place (in Japanese) (See Japanese page) 
Place (in English) Yufugo-kan (Oita) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ambient intelligence, Sensor networks, etc. 
Paper Information
Registration To ASN 
Conference Code 2018-01-ASN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) LED-to-Camera Communication Mechanism Based on Flash Blinks against Inter-Frame Gaps and Frame Drops 
Sub Title (in English)  
Keyword(1) LED-to-camera communication for smartphones  
Keyword(2) Rolling shutter effect  
Keyword(3) Visible light communication  
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1st Author's Name Yuki Hokazono  
1st Author's Affiliation Tokyo University (Tokyo Univ.)
2nd Author's Name Aoi Koizuka  
2nd Author's Affiliation Tokyo University (Tokyo Univ.)
3rd Author's Name Makoto Suzuki  
3rd Author's Affiliation Tokyo University (Tokyo Univ.)
4th Author's Name Yoshiaki Narusue  
4th Author's Affiliation Tokyo University (Tokyo Univ.)
5th Author's Name Hiroyuki Morikawa  
5th Author's Affiliation Tokyo University (Tokyo Univ.)
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Speaker Author-1 
Date Time 2018-01-30 16:05:00 
Presentation Time 25 minutes 
Registration for ASN 
Paper # ASN2017-95 
Volume (vol) vol.117 
Number (no) no.426 
Page pp.71-76 
#Pages 6 
Date of Issue 2018-01-23 (ASN) 

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