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Paper Abstract and Keywords
Presentation 2016-08-19 09:00
[Special Talk] Toward Disaster Resilient Communications Networks
Fumiyuki Adachi (Tohoku Univ.) SAT2016-46 RCS2016-139
Abstract (in Japanese) (See Japanese page) 
(in English) Available radio spectrum and energy are limited for mobile communications and therefore, they must be utilized as much efficiently as possible. Mobile communications networks have now become an infrastructure of our modern society. Once a large scale natural disaster like earthquake happens, many areas may lose communications services and become isolated from the rest of the world and our modern society falls havoc. Therefore, improving the disaster-resiliency becomes increasingly important in addition to improving the spectrum and energy efficiencies.
Learned from lessons of The Great East Japan Earthquake in 11 March 2011, we have been developing the disaster-resilient communications technology. We advocated the multilayered communications network concept. In a damaged or traffic over-loaded cellular networks, users are unable to access the networks. In such a case, the multilayered communications network will be initiated to allow any person having a smartphone equipped with common WiFi air interface to access the multilayered network. In normal situation, different networks (e.g., mobile, public/private WiFi, ITS, satellite networks) operate independently. However, right after a disaster happened, each independent network will become a part of the multilayered network. A wide-area ad-hoc WiFi network is instantly formed using public/private WiFi access points which have survived the disaster. For useful and effective information sharing among a group of people like emergency rescuers groups and fire fighters groups, the multilayered network provide secured simultaneous call and secured group call services. Safety-related information is also provided to handicapped and seniors with authentication. Recently, we have developed an ad-hoc space-time block-coded (STBC) relay using unmanned aircrafts (UAs) aiming at quick offer of the communication services to isolated areas.
In this presentation, our above mentioned research activities on disaster-resilient communications technology will be introduced. We have also been studying decentralized self-organized wireless networks which is believed to be inherently disaster-resilient. This study will also be introduced.
Keyword (in Japanese) (See Japanese page) 
(in English) Multi-layered communications network / space-time block-coded relay / decentralized self-organized network / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 184, RCS2016-139, pp. 57-57, Aug. 2016.
Paper # RCS2016-139 
Date of Issue 2016-08-11 (SAT, RCS) 
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 SAT2016-46 RCS2016-139

Conference Information
Committee SAT RCS  
Conference Date 2016-08-18 - 2016-08-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Gakuin University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Satellite Communications, Broadcasting, Error Correction, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2016-08-SAT-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Toward Disaster Resilient Communications Networks 
Sub Title (in English)  
Keyword(1) Multi-layered communications network  
Keyword(2) space-time block-coded relay  
Keyword(3) decentralized self-organized network  
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1st Author's Name Fumiyuki Adachi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2016-08-19 09:00:00 
Presentation Time 50 minutes 
Registration for RCS 
Paper # SAT2016-46, RCS2016-139 
Volume (vol) vol.116 
Number (no) no.183(SAT), no.184(RCS) 
Page p.75(SAT), p.57(RCS) 
#Pages 1 
Date of Issue 2016-08-11 (SAT, RCS) 

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