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Paper Abstract and Keywords
Presentation 2010-09-10 13:00
Improving Transmission Quality for IEEE 802.11e Wireless LAN Access Networks
Oyunchimeg Shagdar, Kengo Sakai, Hiroyuki Yomo, Akio Hasegawa, Tetsuro Ueda, Ryu Miura, Sadao Obana (ATR) MoMuC2010-34
Abstract (in Japanese) (See Japanese page) 
(in English) Wide spread of Wireless LAN enables users enjoy ubiquitous Internet access for not only the traditional best-effort type application but also real-time applications such as voice. To support real time applications in Wireless LAN, the IEEE 802.11e enhances the legacy 802.11 MAC protocol with service differentiation and it is now installed in off-the-shelf wireless LAN cards. However, because the channel access method of IEEE 802.11e, EDCA (Enhanced Distributed Channel Access), is based on the Distributed Coordination Function (DCF) of the legacy 802.11 MAC, it carries over the issues such as channel underutilization and uplink and downlink unfairness issues. In this paper, we target the latter issue, which is especially problematic for bidirectional applications, such as voice, and propose a scheme that mitigates the unfairness problem by enabling AP adaptively adjust TXOP. The proposed scheme is investigated by simulations and testbed experiments. Our simulation results show that the proposed scheme provides fair communication performance for uplink and downlink traffic. The experimental results show that the proposed scheme can be implemented in the current hardware and network stack and can provide a promising system performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / IEEE 802.11e / Unfairness Issue / TXOP / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, Sept. 2010.
Paper #  
Date of Issue 2010-09-02 (MoMuC) 
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)
Download PDF MoMuC2010-34

Conference Information
Committee ITE-BCT ITE-CE MoNA CQ  
Conference Date 2010-09-09 - 2010-09-10 
Place (in Japanese) (See Japanese page) 
Place (in English) NHK Fukuoka Station 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile/Broadcasting convergence technology, system and application quality, Mobile contents, Mobile video streaming, P2P/Ad-hoc networks, General area 
Paper Information
Registration To MoNA 
Conference Code 2010-09-BCT-CE-MoMuC-CQ 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving Transmission Quality for IEEE 802.11e Wireless LAN Access Networks 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) IEEE 802.11e  
Keyword(3) Unfairness Issue  
Keyword(4) TXOP  
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1st Author's Name Oyunchimeg Shagdar  
1st Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
2nd Author's Name Kengo Sakai  
2nd Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
3rd Author's Name Hiroyuki Yomo  
3rd Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
4th Author's Name Akio Hasegawa  
4th Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
5th Author's Name Tetsuro Ueda  
5th Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
6th Author's Name Ryu Miura  
6th Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
7th Author's Name Sadao Obana  
7th Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
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Speaker Author-1 
Date Time 2010-09-10 13:00:00 
Presentation Time 25 minutes 
Registration for MoNA 
Paper # MoMuC2010-34 
Volume (vol) vol.110 
Number (no) no.199 
Page pp.65-69 
#Pages 5 
Date of Issue 2010-09-02 (MoMuC) 

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