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Paper Abstract and Keywords
Presentation 2011-04-22 10:45
An Adaptive Secondary MAC Protocol over 802.11 Wireless LAN with Database
Takayuki Suzuki, Takeo Fujii (UEC), Osamu Takyu, Yohtaro Umeda (TUS) SR2011-11
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we have proposed a MAC protocol for secondary system overlaying to the primary wireless LAN (PU: Primary User). This MAC protocol can achieve protecting primary system and improving the throughput of secondary system (SU: Secondary User) . Conventional wireless LAN uses CSMA/CA which can share the same spectrum for several users. However, CSMA/CA has a hidden terminal problem, which causes quality degradation and does not have a function of PU protection. Thus, it is difficult to use conventional CSMA/CA for SU MAC protocol. As related rerated works, high performance sensing for SU which can detect further PU has been considered. Although, a giving protection method by changing CWmin has also been considered, any method cannot protect the PU completely. In this paper, we analyze a hidden terminal problem and reveal mutual interference pattern between PU pair and SU pair. The proposed method collects mutual interference and store at a database. By using the database, the transmit parameters are adaptively changed at SU. As a simulation result, we confirm the effectiveness of the proposed protocol.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive Radio / MAC Protocol / Access Control / Database / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 13, SR2011-11, pp. 65-70, April 2011.
Paper # SR2011-11 
Date of Issue 2011-04-14 (SR) 
ISSN Print edition: ISSN 0913-5685    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 SR  
Conference Date 2011-04-21 - 2011-04-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Matsue Terrsa 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Standardization of Software Defined Radio and Cognitive Radio, etc. 
Paper Information
Registration To SR 
Conference Code 2011-04-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Adaptive Secondary MAC Protocol over 802.11 Wireless LAN with Database 
Sub Title (in English)  
Keyword(1) Cognitive Radio  
Keyword(2) MAC Protocol  
Keyword(3) Access Control  
Keyword(4) Database  
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1st Author's Name Takayuki Suzuki  
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)
3rd Author's Name Osamu Takyu  
3rd Author's Affiliation Tokyo University of Science (TUS)
4th Author's Name Yohtaro Umeda  
4th Author's Affiliation Tokyo University of Science (TUS)
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Speaker Author-1 
Date Time 2011-04-22 10:45:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2011-11 
Volume (vol) vol.111 
Number (no) no.13 
Page pp.65-70 
#Pages
Date of Issue 2011-04-14 (SR) 


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