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Paper Abstract and Keywords
Presentation 2008-01-24 13:00
[Invited Talk] An Effective Use of Antennas Directionality for the Future Ubiquitous Infrastructure
Takashi Watanabe (Shizuoka Univ.) CQ2007-86 MoMuC2007-65 USN2007-59
Abstract (in Japanese) (See Japanese page) 
(in English) Communications protocols with directional antennas or beam-steerable antennas are promising technologies for the effective
communication of ubiquitous networks with many transmitters. In this paper, we address some inherent problems of directional antenna
based protocols; acquisition of locations of other nodes, directional hidden terminal problem, and deafness. Then, this paper describes some
solutions for the problems in the medium access control (MAC) layer, and the routing layer. More specifically, we mention SWAMP, BRTS,
HCTS, RCTS, Orthogonal routing, and UNAGI/ESPAR. SWAMP is one of MAC protocols which solves location problem within the MAC
layer. BRT, HCT, and RCT solve directional hidden terminal problems in the MAC layer, while Orthogonal routing does in the routing layer.
We developed UNAGI/ESPAR testbed for ad hoc networks with smart antennas. It incorporates a practical smart antenna, ESPAR as well as
GPS, and gyros. Some experiments results are also shown.
Keyword (in Japanese) (See Japanese page) 
(in English) Ubiquitous Network / Ad Hoc Network / Spatial Reuse / Smart Antennas / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, Jan. 2008.
Paper #  
Date of Issue 2008-01-17 (CQ, MoMuC, USN) 
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 CQ2007-86 MoMuC2007-65 USN2007-59

Conference Information
Committee USN CQ MoNA  
Conference Date 2008-01-24 - 2008-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kenshu Kouryu Center, Actcity Hamamatsu (Shizuoka) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Application quality, Mobile P2P, Ubiquitous networks, Ad hoc networks, Sensor network, etc. 
Paper Information
Registration To MoNA 
Conference Code 2008-01-USN-CQ-MoMuC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Effective Use of Antennas Directionality for the Future Ubiquitous Infrastructure 
Sub Title (in English)  
Keyword(1) Ubiquitous Network  
Keyword(2) Ad Hoc Network  
Keyword(3) Spatial Reuse  
Keyword(4) Smart Antennas  
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1st Author's Name Takashi Watanabe  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Speaker Author-1 
Date Time 2008-01-24 13:00:00 
Presentation Time 45 minutes 
Registration for MoNA 
Paper # CQ2007-86, MoMuC2007-65, USN2007-59 
Volume (vol) vol.107 
Number (no) no.445(CQ), no.446(MoMuC), no.447(USN) 
Page pp.31-36(CQ), pp.1-6(MoMuC), pp.25-30(USN) 
#Pages 6 
Date of Issue 2008-01-17 (CQ, MoMuC, USN) 

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