NO20002884L - Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk - Google Patents

Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk

Info

Publication number
NO20002884L
NO20002884L NO20002884A NO20002884A NO20002884L NO 20002884 L NO20002884 L NO 20002884L NO 20002884 A NO20002884 A NO 20002884A NO 20002884 A NO20002884 A NO 20002884A NO 20002884 L NO20002884 L NO 20002884L
Authority
NO
Norway
Prior art keywords
time
network
network element
time update
servers
Prior art date
Application number
NO20002884A
Other languages
English (en)
Other versions
NO20002884D0 (no
Inventor
Oeyvind Holmeide
Lennart Liljestroem
Original Assignee
Ontime Networks As
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 filed Critical Ontime Networks As
Priority to NO20002884A priority Critical patent/NO20002884L/no
Publication of NO20002884D0 publication Critical patent/NO20002884D0/no
Priority to PCT/NO2001/000234 priority patent/WO2001095550A2/en
Priority to AU2001282686A priority patent/AU2001282686A1/en
Publication of NO20002884L publication Critical patent/NO20002884L/no

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

Den foreliggende oppfinnelsen vedrører et integrert nettverkselement og tidsserver for distribusjon av tidsinformasjon i et datamaskinnettverk. Nettverkselementet omfatter midler for å rute datapakker mellom kommunikasjonsporter, såvel som en lokal klokke og midler for å generere tidsoppdateringsforespørselspakker og tidsoppdaterings- svarpakker. Den tette integrasjon av kommunikasjonstjenester og tidstjenester setter det integrerte nettverkselementet og tidsserver i stand til å distribuere tidsoppdateringsinformasjon samtidig med at unøyaktigheter som resulterer fra svitsjing eller rutingsoperasjoner unngås. Det er også beskrevet en fremgangsmåte for å synkronisere de lokale klokker for noder i et kommunikasjonsnettverk, som benytter seg av egenskapene for det integrerte nettverkselement og tidsserver. Fremgangsmåten tilveiebringer automatisk konfigurering av en tidsoppdateringsstruktur i nettverket, slik at tidsoppdateringsinformasjonen distribueres fra en eller flere master-tidsservere, med integrerte nettverkselementer og tidsservere virkende som slave-tidsservere som sender tidsoppdateringsinformasjonen videre gjennom nettverket.
NO20002884A 2000-06-06 2000-06-06 Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk NO20002884L (no)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NO20002884A NO20002884L (no) 2000-06-06 2000-06-06 Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk
PCT/NO2001/000234 WO2001095550A2 (en) 2000-06-06 2001-06-06 Distributing time information in a communication network
AU2001282686A AU2001282686A1 (en) 2000-06-06 2001-06-06 Distributing time information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20002884A NO20002884L (no) 2000-06-06 2000-06-06 Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk

Publications (2)

Publication Number Publication Date
NO20002884D0 NO20002884D0 (no) 2000-06-06
NO20002884L true NO20002884L (no) 2001-12-07

Family

ID=19911231

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20002884A NO20002884L (no) 2000-06-06 2000-06-06 Fremgangsmåte og apparat for å distribuere tidsinformasjon i et datamaskinnettverk

Country Status (3)

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

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US7633870B2 (en) * 2005-04-18 2009-12-15 Symmetricom, Inc. Network forwarding device and method that forward timing packets through the device with a constant delay
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Also Published As

Publication number Publication date
WO2001095550A3 (en) 2002-05-02
AU2001282686A1 (en) 2001-12-17
NO20002884D0 (no) 2000-06-06
WO2001095550A2 (en) 2001-12-13

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