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Paper Abstract and Keywords
Presentation 2010-07-15 13:30
Analysis of Impacts of Propagation Delay on Long Distance Access with IEEE 802.11 CSMA/CA
Masaaki Tanaka, Daisuke Umehara, Satoshi Denno, Masahiro Morikura (Kyoto Univ.), Takatoshi Sugiyama (NTT Corporation) AN2010-10
Abstract (in Japanese) (See Japanese page) 
(in English) The use of wireless access networks, particularly such as IEEE 802.11
wireless access networks, is a promissing method to bridge economically the digital divide between urban areas and rural and isolated areas. This paper analyzes impacts of propagation delay on long-distance point-to-point wireless networks with IEEE 802.11 CSMA/CA protocol. Uplink and
downlink throughputs decrease with increasing the propagation delay, that is, with increasing distance between access points (APs). A Markov chain model is used to analyze the behavior of the IEEE 802.11 CSMA/CA binary exponential backoff algorithm. It is shown that slot time, RX-to-TX turnaround time, and CCA time affect the total throughput degradation caused by large propagation delay. When the propagation delay is less than 8~$\mu$s, theoretical throughput is in good agreement with the throughput
obtained from computer simulations performed by Qualnet 4.5.1.
Keyword (in Japanese) (See Japanese page) 
(in English) propagation delay / long distance wireless access / CSMA/CA / WLAN / IEEE 802.11 / IEEE 802.11a / throughput / unsynchronized model  
Reference Info. IEICE Tech. Rep., vol. 110, no. 129, AN2010-10, pp. 1-6, July 2010.
Paper # AN2010-10 
Date of Issue 2010-07-08 (AN) 
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)
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Conference Information
Committee AN  
Conference Date 2010-07-15 - 2010-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Hakodate City Central Library 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Etc. 
Paper Information
Registration To AN 
Conference Code 2010-07-AN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of Impacts of Propagation Delay on Long Distance Access with IEEE 802.11 CSMA/CA 
Sub Title (in English)  
Keyword(1) propagation delay  
Keyword(2) long distance wireless access  
Keyword(3) CSMA/CA  
Keyword(4) WLAN  
Keyword(5) IEEE 802.11  
Keyword(6) IEEE 802.11a  
Keyword(7) throughput  
Keyword(8) unsynchronized model  
1st Author's Name Masaaki Tanaka  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Daisuke Umehara  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Satoshi Denno  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Masahiro Morikura  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
5th Author's Name Takatoshi Sugiyama  
5th Author's Affiliation NTT Access Network Service Systems Laboratories (NTT Corporation)
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Speaker Author-1 
Date Time 2010-07-15 13:30:00 
Presentation Time 20 minutes 
Registration for AN 
Paper # AN2010-10 
Volume (vol) vol.110 
Number (no) no.129 
Page pp.1-6 
#Pages 6 
Date of Issue 2010-07-08 (AN) 

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