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Paper Abstract and Keywords
Presentation 2016-03-04 09:30
Estimating a proper communication distance in epidemic routing using people flow data
Akihiro Fujihara (Fukui Univ. Tech.)
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, Proximity-based Services have been attracted attention as
information-communication networking without using any base-station equipment.
Some practical applications, such as iBeacon, Wi-Fi Aware, and Wi-SUN are proposed.
Their transmission ranges vary among applications.
If the transmission range becomes longer, information can be transferred
more widely, but it cosumes more battery power.
Therefore, we must estimate a proper transmission range to optimize the network.
When we consider networking by Epidemic Routing in these applications,
it is valueable to estimate a proper transmission range enough to forward a message to
most mobile nodes in urban area.
In this study, I investigate the proper transmission range in some Japanese urban
areas using SNS-based people flow data through visualizing the patterns.
Since wireless communication patterns between devices moving with human and vehicle
can change temporally, the final size of information forwarded nodes has a
percolation-type transition.
I estimate the critical transmission range using logistic regression analysis.
As a result, I find that the critical ranges are around 900[m] in Tokyo metropolitan
area, 1.8[km] in Chukyo area, and 1.4[km] in Kansai area.
Comparing the populations in urban areas and the number of user IDs in the people
flow data, the critical range is valid in the case that one per thousand or 10
thousands of people join the network.
Keyword (in Japanese) (See Japanese page) 
(in English) SNS-based People Flow Data / Epidemic Routing / Proximity-based Services / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 484, IN2015-124, pp. 95-100, March 2016.
Paper # IN2015-124 
Date of Issue 2016-02-25 (IN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee NS IN  
Conference Date 2016-03-03 - 2016-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Phoenix Seagaia Resort 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To IN 
Conference Code 2016-03-NS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimating a proper communication distance in epidemic routing using people flow data 
Sub Title (in English)  
Keyword(1) SNS-based People Flow Data  
Keyword(2) Epidemic Routing  
Keyword(3) Proximity-based Services  
1st Author's Name Akihiro Fujihara  
1st Author's Affiliation Fukui University of Technology (Fukui Univ. Tech.)
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Date Time 2016-03-04 09:30:00 
Presentation Time 20 
Registration for IN 
Paper # IEICE-IN2015-124 
Volume (vol) IEICE-115 
Number (no) no.484 
Page pp.95-100 
#Pages IEICE-6 
Date of Issue IEICE-IN-2016-02-25 

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