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Paper Abstract and Keywords
Presentation 2022-07-15 14:30
Blockage prediction for millimeter-wave communications based on people flow data
Hirofumi Nakajo, Takeo Fujii (UEC) SR2022-42
Abstract (in Japanese) (See Japanese page) 
(in English) Thanks to the high bandwidth available at millimeter-wave (mmWave), mmWave communications support high data rates and large traffic volumes.However, mmWave communications are vulnerable to sudden blockage of the line-of-sight environment.Various discussions have been held on this issue because ensuring communication reliability is an important issue.In this paper, we predict the future state of pedestrians, the main cause of the blockage, utilizing time-series data of people flow, such as pedestrian flow and density, in a certain space.The average walking speed in the space is calculated by giving the predicted values of people flow to a pedestrian model used in urban space design.Furthermore, we define the occurrence of blockage as the existence of a person in the first Fresnel zone, and based on the above information, we calculate the estimated value of the time-series data of the duration of the blockage in the space. In this paper, we evaluate the above methods via human blockage experimental measurements and computer simulations.The estimation accuracy of the true duration of blockage obtained from the experimental measurements and that derived from the pedestrian model and the first Fresnel zone are evaluated.In the computer simulation, open data of people flow is utilized to predict the time series, and the effect of the prediction error of the people flow on the estimation accuracy of the duration of the blockage is clarified.
Keyword (in Japanese) (See Japanese page) 
(in English) Millimeter-wave communications / blockage prediction / people flow data / pedestrians / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 107, SR2022-42, pp. 96-103, July 2022.
Paper # SR2022-42 
Date of Issue 2022-07-06 (SR) 
ISSN Online edition: ISSN 2432-6380
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 SR2022-42

Conference Information
Committee NS SR RCS SeMI RCC  
Conference Date 2022-07-13 - 2022-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) The Kanazawa Theatre + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Distributed Wireless Network, M2M (Machine-to-Machine),D2D (Device-to-Device),IoT(Internet of Things), etc 
Paper Information
Registration To SR 
Conference Code 2022-07-NS-SR-RCS-SeMI-RCC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blockage prediction for millimeter-wave communications based on people flow data 
Sub Title (in English)  
Keyword(1) Millimeter-wave communications  
Keyword(2) blockage prediction  
Keyword(3) people flow data  
Keyword(4) pedestrians  
1st Author's Name Hirofumi Nakajo  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Takeo Fujii  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2022-07-15 14:30:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2022-42 
Volume (vol) vol.122 
Number (no) no.107 
Page pp.96-103 
Date of Issue 2022-07-06 (SR) 

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