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Paper Abstract and Keywords
Presentation 2019-03-08 14:00
A Measurement Method for Wireless Bottlenecks on Enterprise Network
Sumiyo Okada, Chunghan Lee, Tomohiro Ishihara (Fujitsu Labs.) SITE2018-83 IA2018-75
Abstract (in Japanese) (See Japanese page) 
(in English) Since the explosively increasing of wireless-LAN-connected terminals, such as notebook PCs and tablet PSs, used in enterprise environments, the communication quality degradations caused by the wireless LAN (WLAN) are often observed. The first reason is that the bandwidth is narrow in comparison with the wired LAN. The second one is that the traffic volume at WLAN access point (WLAN AP) is abruptly changed by the mobility of device. Although, existing end-to-end throughput measurement cannot detect the bottleneck. Nor wireless-layer quality measurement cannot detect degradation of TCP-connection’s quality which affect QoE (Quality of Experience). In this research, we developed new measurement method that detects the deteriorated TCP-connection affected by the WLAN’s bottleneck. Our passive measurement method is based on the nature of TCP’s RTT that continuously increase at the WLAN’s bottleneck. By combining the detected TCP-connection’s information and WLAN AP’s connection information, we can specify the WLAN-AP in the bottleneck WLAN. We also prototyped a WLAN-quality visualization tool and applied our method to enterprise network over a thousand of hosts. As a result, our method clearly detected the wireless bottlenecks on the enterprise network.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / Bottleneck / Passive measurement / TCP / RTT / Throughput / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 481, IA2018-75, pp. 279-285, March 2019.
Paper # IA2018-75 
Date of Issue 2019-02-28 (SITE, IA) 
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 IA SITE IPSJ-IOT  
Conference Date 2019-03-07 - 2019-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Grand XIV Naruto 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Internet and Information Ethics Education, etc. 
Paper Information
Registration To IA 
Conference Code 2019-03-IA-SITE-IOT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Measurement Method for Wireless Bottlenecks on Enterprise Network 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) Bottleneck  
Keyword(3) Passive measurement  
Keyword(4) TCP  
Keyword(5) RTT  
Keyword(6) Throughput  
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Keyword(8)  
1st Author's Name Sumiyo Okada  
1st Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs.)
2nd Author's Name Chunghan Lee  
2nd Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs.)
3rd Author's Name Tomohiro Ishihara  
3rd Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs.)
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Speaker Author-1 
Date Time 2019-03-08 14:00:00 
Presentation Time 25 minutes 
Registration for IA 
Paper # SITE2018-83, IA2018-75 
Volume (vol) vol.118 
Number (no) no.480(SITE), no.481(IA) 
Page pp.279-285 
#Pages
Date of Issue 2019-02-28 (SITE, IA) 


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