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Paper Abstract and Keywords
Presentation 2010-12-17 11:30
Functionality extensions of crowd density estimation by wireless sensors
Takamasa Suzuki, Masayuki Nakatsuka, Jiro Katto (Waseda Univ.) NS2010-133
Abstract (in Japanese) (See Japanese page) 
(in English) Today, for market's investigations and automatic monitoring systems, crowd density estimation becomes an important research topic. There are existing methods like the camera based crowd density estimation or the RFID based counting systems. However, these methods need deployment cost and enough spaces to set the sensors. To solve these problems, there is a estimation system using RSSI (Received Signal Strength Indicator) and LQI (Link Quality Indicator) in wireless sensor networks [1]. RSSI is a signal strength obtained by monitoring the packets that are communicated between nodes. We assume that, as the number of people increase, RSSI value is violated and decreases.
However, this method applies only to networks that one pair nodes communicate with each other. It’s not practicable for many networks. In this paper, we therefore extend a existing method to multihop networks where two or more nodes access to a base station and cover wider area. Finally, we evaluate validity of our proposal and develop an application with wireless sensors.
Keyword (in Japanese) (See Japanese page) 
(in English) Crowd Density / Wireless Sensor Networks / RSSI / LQI / Zigbee / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 339, NS2010-133, pp. 167-172, Dec. 2010.
Paper # NS2010-133 
Date of Issue 2010-12-09 (NS) 
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 NS2010-133

Conference Information
Committee NS RCS  
Conference Date 2010-12-16 - 2010-12-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network 
Paper Information
Registration To NS 
Conference Code 2010-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Functionality extensions of crowd density estimation by wireless sensors 
Sub Title (in English)  
Keyword(1) Crowd Density  
Keyword(2) Wireless Sensor Networks  
Keyword(3) RSSI  
Keyword(4) LQI  
Keyword(5) Zigbee  
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Keyword(7)  
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1st Author's Name Takamasa Suzuki  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Masayuki Nakatsuka  
2nd Author's Affiliation Waseda University (Waseda Univ.)
3rd Author's Name Jiro Katto  
3rd Author's Affiliation Waseda University (Waseda Univ.)
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Speaker Author-1 
Date Time 2010-12-17 11:30:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2010-133 
Volume (vol) vol.110 
Number (no) no.339 
Page pp.167-172 
#Pages 6 
Date of Issue 2010-12-09 (NS) 

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