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Paper Abstract and Keywords
Presentation 2009-03-05 17:20
Implementation of precision clock synchronization protocol to IEEE802.11
Masayuki Hiyama (Nagaoka Univ. of Tech.), Katsuyuki Yamazaki (Nagaoka Univ. of Tech/Univ. of Tokyo.), Yuichi Morita, Masanao Shinohara, Toshihiko Kanazawa (Univ. of Tokyo.) SITE2008-56 IA2008-79
Abstract (in Japanese) (See Japanese page) 
(in English) 本稿では,アプリケーションレベルではなくハードウェアレベルでクロック同期を行うIEEE 1588高精度時刻同期方式(PTP)の無線LANにおける実現についての検討を行う.地球環境観測の分野では,広範囲に計測ノードを配置する必要があることから,計測ノード間のネットワークとしては有線よりも無線が適している場合が多い.また,このように広範囲に配置されたネットワークでは,分散配置された各計測ノードで取得されたデータの間でのタイムスタンプのずれが分析・解析の精度に大きく影響するため,計測ノード間の時刻同期が必要である.しかし現在、要求される同期精度を満たすことができる無線システムでの時刻同期技術は存在しない.そのため,有線LANで一部実用化されている高精度時刻同期方式(PTP)を無線LANシステムに実装する.本稿では研究の第一段階として,無線LANでPTPを実現するための基本部分の設計と実装を行い,同期精度についての実験と評価を行う.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LAN / Clock Synchronization / NTP / PTP / IEEE1588 / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 460, IA2008-79, pp. 73-78, March 2009.
Paper # IA2008-79 
Date of Issue 2009-02-26 (SITE, IA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 IA SITE  
Conference Date 2009-03-05 - 2009-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IA 
Conference Code 2009-03-IA-SITE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Implementation of precision clock synchronization protocol to IEEE802.11 
Sub Title (in English)  
Keyword(1) Wireless LAN  
Keyword(2) Clock Synchronization  
Keyword(3) NTP  
Keyword(4) PTP  
Keyword(5) IEEE1588  
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1st Author's Name Masayuki Hiyama  
1st Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
2nd Author's Name Katsuyuki Yamazaki  
2nd Author's Affiliation Nagaoka University of Technology/University of Tokyo (Nagaoka Univ. of Tech/Univ. of Tokyo.)
3rd Author's Name Yuichi Morita  
3rd Author's Affiliation Earthquake Research Institute, University of Tokyo (Univ. of Tokyo.)
4th Author's Name Masanao Shinohara  
4th Author's Affiliation Earthquake Research Institute, University of Tokyo (Univ. of Tokyo.)
5th Author's Name Toshihiko Kanazawa  
5th Author's Affiliation Earthquake Research Institute, University of Tokyo (Univ. of Tokyo.)
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Speaker Author-1 
Date Time 2009-03-05 17:20:00 
Presentation Time 20 minutes 
Registration for IA 
Paper # SITE2008-56, IA2008-79 
Volume (vol) vol.108 
Number (no) no.459(SITE), no.460(IA) 
Page pp.73-78 
#Pages
Date of Issue 2009-02-26 (SITE, IA) 


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