NO20004002L - Telekommunikasjonssystem - Google Patents

Telekommunikasjonssystem

Info

Publication number
NO20004002L
NO20004002L NO20004002A NO20004002A NO20004002L NO 20004002 L NO20004002 L NO 20004002L NO 20004002 A NO20004002 A NO 20004002A NO 20004002 A NO20004002 A NO 20004002A NO 20004002 L NO20004002 L NO 20004002L
Authority
NO
Norway
Prior art keywords
synchronisation signal
synchronisation
ssm
ssi
data
Prior art date
Application number
NO20004002A
Other languages
English (en)
Other versions
NO20004002D0 (no
Inventor
Iain James Slater
Original Assignee
Marconi Comm Ltd
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 Marconi Comm Ltd filed Critical Marconi Comm Ltd
Publication of NO20004002D0 publication Critical patent/NO20004002D0/no
Publication of NO20004002L publication Critical patent/NO20004002L/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
    • H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
    • 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
    • H04J3/0647—Synchronisation among TDM nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
    • H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
    • 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
    • H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
    • H04J3/0688—Change of the master or reference, e.g. take-over or failure of the master

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

I et nett av SDH-utstyr (f.eks. synkrone multipleksere av typen "add/drop") for kommuni- kasjon av signaler som omfatter data, utnyttes et synkroniseringssignal for synkroniser- ing av dataene og en synkroniseringsstatusmelding (SSM) som angir kvaliteten på kilden for synkroniseringssignalet, og når et synkroniseringssignal avgis via en synkroniserings- signalutgang (SSO) til et frittstående synkroniseringsutstyr (SASE) for behandling og påfølgende innføring via en synkroniseringssignalinngang (SSI), kan SSM-informasjon gå tapt. Det er fremskaffet utstyr for innenfor SDH-utstyret å knytte den relevante synkroni- seringsstatusmelding (SSM) til det synkroniseringssignal som innføres ved synkroniser- ingssignalinngangen (SSI).
NO20004002A 1999-08-10 2000-08-08 Telekommunikasjonssystem NO20004002L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9918725A GB2353173B (en) 1999-08-10 1999-08-10 Communications system

Publications (2)

Publication Number Publication Date
NO20004002D0 NO20004002D0 (no) 2000-08-08
NO20004002L true NO20004002L (no) 2001-02-12

Family

ID=10858826

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20004002A NO20004002L (no) 1999-08-10 2000-08-08 Telekommunikasjonssystem

Country Status (10)

Country Link
US (1) US6560245B1 (no)
EP (1) EP1076432B1 (no)
JP (1) JP2001230747A (no)
CN (1) CN100362832C (no)
AT (1) ATE339814T1 (no)
AU (1) AU5185900A (no)
DE (1) DE60030643T2 (no)
GB (1) GB2353173B (no)
NO (1) NO20004002L (no)
RU (1) RU2000121541A (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901588A1 (de) * 1999-01-16 2000-07-20 Alcatel Sa Synchronisation eines Netzelementes in einem synchronen digitalen Nachrichtenübertragungsnetz
DE19943779A1 (de) * 1999-09-13 2001-03-22 Siemens Ag Anordnung zum Synchronisieren von über ein Kommunikationsnetz gekoppelten Kommunikationssystemkomponenten
GB2355898B (en) * 1999-10-26 2002-07-03 Marconi Comm Ltd Communications system
US20080170592A1 (en) * 2007-01-11 2008-07-17 International Business Machines Corporation Almost peer-to-peer clock synchronization
CN101272215B (zh) * 2007-03-20 2012-07-04 中兴通讯股份有限公司 光传输单元帧生成方法与装置及传递时钟等级方法与装置
CN101192913B (zh) * 2007-08-08 2010-12-08 中兴通讯股份有限公司 一种在光传送网络完成时钟同步和时钟倒换的系统和方法
CN103476105B (zh) 2013-08-21 2016-04-06 北京邮电大学 空中接口同步方法
US11223436B2 (en) * 2017-11-27 2022-01-11 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for determining an availability of a synchronization source
CN115086647A (zh) * 2022-06-07 2022-09-20 北京歌华有线电视网络股份有限公司 一种数字电视值机监管系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446511A1 (de) * 1994-12-24 1996-06-27 Sel Alcatel Ag Synchrones digitales Nachrichtenübertragungssystem mit hierarchischem Synchronisierungsnetz
GB2312353B (en) * 1996-04-16 2000-12-06 Gpt Ltd Digital telecommunications transmision systems
DE19653261A1 (de) * 1996-12-20 1998-06-25 Alsthom Cge Alcatel Synchrones digitales Nachrichtenübertragungssystem, Steuerungseinrichtung, Netzelement und zentraler Taktgenerator
FI103307B (fi) * 1997-02-11 1999-05-31 Nokia Telecommunications Oy Tietoliikenneverkon synkronointi
EP0863633A3 (de) * 1997-03-03 2004-07-07 Lucent Technologies Network Systems GmbH Automatische Ersatzschaltung von Primärreferenzquellen in synchronen Netzen

Also Published As

Publication number Publication date
US6560245B1 (en) 2003-05-06
RU2000121541A (ru) 2002-08-20
GB9918725D0 (en) 1999-10-13
GB2353173A (en) 2001-02-14
EP1076432B1 (en) 2006-09-13
CN1283912A (zh) 2001-02-14
CN100362832C (zh) 2008-01-16
GB2353173B (en) 2001-09-19
EP1076432A2 (en) 2001-02-14
AU5185900A (en) 2001-02-15
ATE339814T1 (de) 2006-10-15
DE60030643T2 (de) 2007-09-13
NO20004002D0 (no) 2000-08-08
JP2001230747A (ja) 2001-08-24
EP1076432A3 (en) 2004-01-21
DE60030643D1 (de) 2006-10-26

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