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Paper Abstract and Keywords
Presentation 2007-01-25 16:10
Channel Quality Improvement Method based on Relative Mobility Speed in High-speed Mobile Environment
Takayuki Yamada, Ryoichi Shinkuma, Tatsuro Takahashi (Kyoto Univ.) MoMuC2006-70
Abstract (in Japanese) (See Japanese page) 
(in English) The demand for multimedia services and Internet access in vehicles has been growing with the spread of intelligent transport systems (ITS).
To access the infrastructure network from vehicles, a wireless road-vehicle communication system is necessary.
In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs).
However, the speed of vehicles is so fast that the channel condition between the terminals and the APs constantly changes due to changing path-loss and time-varying fading.
In this paper, we used an inter-vehicle packet relay technique to improve channel quality in road-vehicle communication systems.
If a terminal can send data via other vehicles moving at lower speed, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading.
We evaluated this method using numerical analysis and computer simulation to validate the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) ITS / road-vehicle communication / inter-vehicle communication / relative speed / Doppler shift / / /  
Reference Info. IEICE Tech. Rep., vol. 106, Jan. 2007.
Paper #  
Date of Issue 2007-01-18 (MoMuC) 
ISSN Print edition: ISSN 0913-5685  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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MoMuC2006-70

Conference Information
Committee MoNA  
Conference Date 2007-01-25 - 2007-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Multimedia for 4G, Mobile Communication Quality, Mobile Content Management, Mobile Security 
Paper Information
Registration To MoNA 
Conference Code 2007-01-MoMuC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Channel Quality Improvement Method based on Relative Mobility Speed in High-speed Mobile Environment 
Sub Title (in English)  
Keyword(1) ITS  
Keyword(2) road-vehicle communication  
Keyword(3) inter-vehicle communication  
Keyword(4) relative speed  
Keyword(5) Doppler shift  
1st Author's Name Takayuki Yamada  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Ryoichi Shinkuma  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Tatsuro Takahashi  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
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Date Time 2007-01-25 16:10:00 
Presentation Time 25 
Registration for MoNA 
Paper # IEICE-MoMuC2006-70 
Volume (vol) IEICE-106 
Number (no) no.498 
Page pp.53-56 
#Pages IEICE-4 
Date of Issue IEICE-MoMuC-2007-01-18 

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