WO2001095550A3 - Distributing time information in a communication network - Google Patents

Distributing time information in a communication network Download PDF

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Publication number
WO2001095550A3
WO2001095550A3 PCT/NO2001/000234 NO0100234W WO0195550A3 WO 2001095550 A3 WO2001095550 A3 WO 2001095550A3 NO 0100234 W NO0100234 W NO 0100234W WO 0195550 A3 WO0195550 A3 WO 0195550A3
Authority
WO
WIPO (PCT)
Prior art keywords
time
network element
time update
network
servers
Prior art date
Application number
PCT/NO2001/000234
Other languages
French (fr)
Other versions
WO2001095550A2 (en
Inventor
Oeyvind Holmeide
Lennart Liljestroem
Original Assignee
Ontime Networks As
Oeyvind Holmeide
Lennart Liljestroem
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 Ontime Networks As, Oeyvind Holmeide, Lennart Liljestroem filed Critical Ontime Networks As
Priority to AU2001282686A priority Critical patent/AU2001282686A1/en
Publication of WO2001095550A2 publication Critical patent/WO2001095550A2/en
Publication of WO2001095550A3 publication Critical patent/WO2001095550A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0673—Clock or time synchronisation among packet nodes using intermediate nodes, e.g. modification of a received timestamp before further transmission to the next packet node, e.g. including internal delay time or residence time into the packet

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)

Abstract

An integrated network element and time server for distribution of time information in a computer network. The network element comprises means for routing data packets between communication ports, as well as a local clock and means for generating time update request packets and time update reply packets. The tight integration of communication services and time services enables the integrated network element and time server to distribute time update information while avoiding inaccuracies resulting from switching or routing operations. Also described is a method for synchronizing the local clocks of nodes in a communication network, taking advantage of the properties of the integrated network element and time server. The method provides automatic configuration of a time update structure in the network, so that time update information is distributed from one or more master time servers, with integrated network element and time servers working as slave time servers passing the time update information on throughout the network.
PCT/NO2001/000234 2000-06-06 2001-06-06 Distributing time information in a communication network WO2001095550A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001282686A AU2001282686A1 (en) 2000-06-06 2001-06-06 Distributing time information

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20002884 2000-06-06
NO20002884A NO20002884L (en) 2000-06-06 2000-06-06 Method and apparatus for distributing time information in a computer network

Publications (2)

Publication Number Publication Date
WO2001095550A2 WO2001095550A2 (en) 2001-12-13
WO2001095550A3 true WO2001095550A3 (en) 2002-05-02

Family

ID=19911231

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2001/000234 WO2001095550A2 (en) 2000-06-06 2001-06-06 Distributing time information in a communication network

Country Status (3)

Country Link
AU (1) AU2001282686A1 (en)
NO (1) NO20002884L (en)
WO (1) WO2001095550A2 (en)

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EP3617979B1 (en) * 2005-06-27 2023-03-01 The 41st Parameter, Inc. Method and system for identifying users and detecting fraud by use of the internet
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US9112626B2 (en) 2007-01-31 2015-08-18 International Business Machines Corporation Employing configuration information to determine the role of a server in a coordinated timing network
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US12002053B2 (en) 2022-03-10 2024-06-04 The 41St Parameter, Inc. Systems and methods for accessing records via derivative locators

Also Published As

Publication number Publication date
NO20002884L (en) 2001-12-07
WO2001095550A2 (en) 2001-12-13
AU2001282686A1 (en) 2001-12-17
NO20002884D0 (en) 2000-06-06

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