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Paper Abstract and Keywords
Presentation 2010-03-04 11:10
An Adaptive Carrier Sensing for Addressing Deafness and Hidden Terminal Problems in Directional MAC Protocol
Yuichi Miyaji, Hideyuki Uehara, Takashi Ohira (Toyohashi Univ. of Tech.) NS2009-175
Abstract (in Japanese) (See Japanese page) 
(in English) The use of smart antennas for the efficient utilization of wireless resources has attracted much attention in ad hoc networks.
A smart antenna can control the beam pattern electronically to improve the space utilization and extend the communication range. However, a node makes a false judgment in a physical carrier sense because the radiated power of smart antennas is ununiform spatially. The deafness and the hidden terminal problem which are the issues of directional MAC protocol occur because of the false judgment in the physical carrier sense. In this paper, we propose adaptive control methods of the carrier sense threshold to solve the false judgment in the directional MAC protocol. This methods decrease the carrier sense threshold depending on a retransmission caused by each problem. Evaluating the performance of proposals by the computer simulation we show that the proposed methods avoid the false judgment and improve the total throughput.
Keyword (in Japanese) (See Japanese page) 
(in English) Smart Antennas / Medium Access Control / Physical Carrier Sense / Deafness Problem / Hidden Terminal Problem / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 448, NS2009-175, pp. 77-82, March 2010.
Paper # NS2009-175 
Date of Issue 2010-02-25 (NS) 
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 NS2009-175

Conference Information
Committee NS IN  
Conference Date 2010-03-04 - 2010-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Miyazaki Phoenix Seagaia Resort (Miyazaki) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General, NS+IN workshop (March 4-5) 
Paper Information
Registration To NS 
Conference Code 2010-03-NS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Adaptive Carrier Sensing for Addressing Deafness and Hidden Terminal Problems in Directional MAC Protocol 
Sub Title (in English)  
Keyword(1) Smart Antennas  
Keyword(2) Medium Access Control  
Keyword(3) Physical Carrier Sense  
Keyword(4) Deafness Problem  
Keyword(5) Hidden Terminal Problem  
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Keyword(7)  
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1st Author's Name Yuichi Miyaji  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
2nd Author's Name Hideyuki Uehara  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
3rd Author's Name Takashi Ohira  
3rd Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. of Tech.)
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Speaker Author-1 
Date Time 2010-03-04 11:10:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2009-175 
Volume (vol) vol.109 
Number (no) no.448 
Page pp.77-82 
#Pages 6 
Date of Issue 2010-02-25 (NS) 

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