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WO2009001583A1 - 時刻管理サーバ、時刻管理プログラム、および時刻管理方法 - Google Patents

時刻管理サーバ、時刻管理プログラム、および時刻管理方法

Info

Publication number
WO2009001583A1
WO2009001583A1 PCT/JP2008/054274 JP2008054274W WO2009001583A1 WO 2009001583 A1 WO2009001583 A1 WO 2009001583A1 JP 2008054274 W JP2008054274 W JP 2008054274W WO 2009001583 A1 WO2009001583 A1 WO 2009001583A1
Authority
WO
WIPO (PCT)
Prior art keywords
time management
clients
time
client
end internal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2008/054274
Other languages
English (en)
French (fr)
Inventor
Yuji Miyamoto
Ryota Akiyama
Yasuo Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Broad Solution and Consulting Inc
Original Assignee
Fujitsu Broad Solution and Consulting Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Broad Solution and Consulting Inc filed Critical Fujitsu Broad Solution and Consulting Inc
Publication of WO2009001583A1 publication Critical patent/WO2009001583A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)
  • Debugging And Monitoring (AREA)

Abstract

　内部時計に障害があるコンピュータを的確に検出できるようにする。 　時刻情報収集手段（１ｃ）により、クライアント（２），（３），（４）が有するクライアント側内部時計で示されたローカル時刻が取得される。次に、遅延時間算出手段（１ｄ）により、クライアント（２），（３），（４）ごとの送出時刻と到着時刻とから、通信における遅延時間が算出される。そして、障害検出手段（１ｅ）により、遅延時間によってローカル時刻が補正され、クライアント（２），（３），（４）ごとに、サーバ側内部時計（１ａ）とクライアント側内部時計との誤差が所定の閾値以内か否かが判断される。全てのクライアント（２），（３），（４）の誤差が閾値を超えていた場合、サーバ側内部時計（１ａ）に障害があると判定される。誤差が閾値を超えているクライアントの数が所定の割合以下の場合、誤差が閾値を超えているクライアントのクライアント側内部時計に障害があると判定される。
PCT/JP2008/054274 2007-06-26 2008-03-10 時刻管理サーバ、時刻管理プログラム、および時刻管理方法 Ceased WO2009001583A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-167970 2007-06-26
JP2007167970A JP2009008444A (ja) 2007-06-26 2007-06-26 時刻管理サーバ、時刻管理プログラム、および時刻管理方法

Publications (1)

Publication Number Publication Date
WO2009001583A1 true WO2009001583A1 (ja) 2008-12-31

Family

ID=40185407

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/054274 Ceased WO2009001583A1 (ja) 2007-06-26 2008-03-10 時刻管理サーバ、時刻管理プログラム、および時刻管理方法

Country Status (2)

Country Link
JP (1) JP2009008444A (ja)
WO (1) WO2009001583A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107612788A (zh) * 2017-11-07 2018-01-19 中国电子科技集团公司第二十八研究所 一种时间服务器故障检测方法、设备和系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012234275A (ja) * 2011-04-28 2012-11-29 Nec System Technologies Ltd リアルタイムクロック補正回路及びリアルタイムクロック補正方法
JP5697154B2 (ja) * 2011-08-15 2015-04-08 日本電気株式会社 オシレータ劣化検出装置及びオシレータ劣化検出方法
JP5505472B2 (ja) * 2012-07-31 2014-05-28 カシオ計算機株式会社 時刻情報取得装置、及び、電波時計
FR3103035B1 (fr) * 2019-11-12 2021-10-29 Continental Automotive Procédé de réglage d’une horloge embarquée dans un véhicule automobile et dispositif de réglage associé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08256161A (ja) * 1995-03-15 1996-10-01 Nec Corp ネットワークの時刻情報同期方式
JPH10160873A (ja) * 1996-12-04 1998-06-19 Nec Corp 時刻同期方式
JP2004170139A (ja) * 2002-11-18 2004-06-17 Hitachi Electronics Service Co Ltd 端末のｔｏｄ自動修正方法及び自動修正システム
JP2007068087A (ja) * 2005-09-02 2007-03-15 Nippon Telegr & Teleph Corp <Ntt> 多地点接続通信サービス主観品質推定方法及び装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08256161A (ja) * 1995-03-15 1996-10-01 Nec Corp ネットワークの時刻情報同期方式
JPH10160873A (ja) * 1996-12-04 1998-06-19 Nec Corp 時刻同期方式
JP2004170139A (ja) * 2002-11-18 2004-06-17 Hitachi Electronics Service Co Ltd 端末のｔｏｄ自動修正方法及び自動修正システム
JP2007068087A (ja) * 2005-09-02 2007-03-15 Nippon Telegr & Teleph Corp <Ntt> 多地点接続通信サービス主観品質推定方法及び装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107612788A (zh) * 2017-11-07 2018-01-19 中国电子科技集团公司第二十八研究所 一种时间服务器故障检测方法、设备和系统

Also Published As

Publication number Publication date
JP2009008444A (ja) 2009-01-15

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