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Paper Abstract and Keywords
Presentation 2024-10-10 10:25
Distributed Timeslot Control in a Disaster Notification Wireless Mesh Network Applying Plumtree
Tomoki Okuda (Kogakuin Univ), Masaaki Ohnishi (NOHMI BOSAI), Ryohei Banno (Hitotsubashi Univ) NS2024-99
Abstract (in Japanese) (See Japanese page) 
(in English) The existing emergency notification system relies on wired networks, and it is believed that large-scale communication disruptions, such as those affecting 119 emergency calls, can occur during catastrophic disasters like massive earthquakes. To address this, we have proposed the construction of a disaster-resistant wireless mesh network that operates independently of various infrastructures during normal times. This mesh network uses the Plumtree algorithm to achieve fault tolerance and efficient broadcasting. Additionally, by maintaining a routing table of node IDs from itself to the root node, it enables unicast communication. However, this approach may have a negative impact on delay performance due to the allocation of timeslots on the tree. This research aims to solve this problem by autonomously reassigning timeslots. Specifically, each node sends a timeslot control message, and only nodes meeting certain conditions exchange timeslot numbers using hop count as an indicator. This is expected to result in timeslot numbers aligning sequentially from leaf nodes towards the root node, potentially reducing unicast delay times. After confirming the convergence of timeslot number exchanges, a negative correlation was observed between hop count and timeslot number.
Keyword (in Japanese) (See Japanese page) 
(in English) Plumtree / spanning tree / timeslot / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 197, NS2024-99, pp. 46-51, Oct. 2024.
Paper # NS2024-99 
Date of Issue 2024-10-02 (NS) 
ISSN 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 NS2024-99

Conference Information
Committee NS  
Conference Date 2024-10-09 - 2024-10-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokushima University + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network architecture (5G, Local 5G, Beyond5G, Mobile networks, Ad-hoc and sensor networks, Overlay and P2P networks, Programmable networks, SDN/NFV, IoT, Network slicing), Next generation packet transport (High speed Ethernet, IP over WDM, Multi-service package technology, MPLS), Grid, etc. 
Paper Information
Registration To NS 
Conference Code 2024-10-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distributed Timeslot Control in a Disaster Notification Wireless Mesh Network Applying Plumtree 
Sub Title (in English)  
Keyword(1) Plumtree  
Keyword(2) spanning tree  
Keyword(3) timeslot  
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1st Author's Name Tomoki Okuda  
1st Author's Affiliation Kogakuin University (Kogakuin Univ)
2nd Author's Name Masaaki Ohnishi  
2nd Author's Affiliation NOHMI BOSAI LTD. (NOHMI BOSAI)
3rd Author's Name Ryohei Banno  
3rd Author's Affiliation Hitotsubashi University (Hitotsubashi Univ)
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Speaker Author-1 
Date Time 2024-10-10 10:25:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2024-99 
Volume (vol) vol.124 
Number (no) no.197 
Page pp.46-51 
#Pages 6 
Date of Issue 2024-10-02 (NS) 

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