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Paper Abstract and Keywords
Presentation 2021-08-24 15:05
[Invited Lecture] A study of speed-up method by reducing the number of paths of intra-factory radio wave propagation simulation including dynamic shielding by ray tracing calculation in CPS emulator
Masayuki Shirakawa, Rei Furukawa, Yukiko Kishiki (KKE), Hirokazu Sawada, Takeshi Matsumura, Fumihide Kojima (NICT) SRW2021-25
Abstract (in Japanese) (See Japanese page) 
(in English) In this presentation, we outline the development of a wireless emulator as part of the Ministry of Internal Affairs and Communications (MIC) research project "R&D for the realization of high-precision radio wave emulator in cyberspace," and present the results of the study on the method for the speeding-up the simulation of the shielding effect of moving objects in a factory as a basic study of the method for simulating dynamic radio wave environments.
The ray tracing method, which is a method to simulate radio wave propagation, requires more computation time as the model becomes larger and more complex, and it is difficult to evaluate a dynamic model with moving shields in a short time. In our method, the path is estimated by the ray tracing method for a model without moving shields, and the paths that intersect the shields are removed. We compared the results of our method to the results of the ray tracing method for 3D models which represent moving shields for each location. As a result, we confirmed that the similar results can be obtained in a shorter calculation time with our method. In addition, we report the results of a method for reducing the number of paths by setting a threshold on the path power and a method for clustering paths.
In the former method, we obtain similar results in a shorter calculation time because paths which contributes to the received power calculation are reduced.
On the other hand, in the latter method, the calculation time was reduced by calculating the received power with clustered paths which are defined paths and widths. However, the difference between the calculated received powers obtained by the latter method and those obtained by the conventional method is larger than that by the former method. It is necessary to compare these results with experimental results to improve the accuracy.
Keyword (in Japanese) (See Japanese page) 
(in English) CPS emulator / ray-tracing / clustering / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 145, SRW2021-25, pp. 33-38, Aug. 2021.
Paper # SRW2021-25 
Date of Issue 2021-08-17 (SRW) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee SRW  
Conference Date 2021-08-24 - 2021-08-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) WLAN, WPAN, Ad-hoc, mmWave, etc. 
Paper Information
Registration To SRW 
Conference Code 2021-08-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study of speed-up method by reducing the number of paths of intra-factory radio wave propagation simulation including dynamic shielding by ray tracing calculation in CPS emulator 
Sub Title (in English)  
Keyword(1) CPS emulator  
Keyword(2) ray-tracing  
Keyword(3) clustering  
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1st Author's Name Masayuki Shirakawa  
1st Author's Affiliation KOZO KEIKAKU ENGINEERING Inc. (KKE)
2nd Author's Name Rei Furukawa  
2nd Author's Affiliation KOZO KEIKAKU ENGINEERING Inc. (KKE)
3rd Author's Name Yukiko Kishiki  
3rd Author's Affiliation KOZO KEIKAKU ENGINEERING Inc. (KKE)
4th Author's Name Hirokazu Sawada  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
5th Author's Name Takeshi Matsumura  
5th Author's Affiliation National Institute of Information and Communications Technology (NICT)
6th Author's Name Fumihide Kojima  
6th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2021-08-24 15:05:00 
Presentation Time 25 minutes 
Registration for SRW 
Paper # SRW2021-25 
Volume (vol) vol.121 
Number (no) no.145 
Page pp.33-38 
#Pages
Date of Issue 2021-08-17 (SRW) 


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