DK0554268T3 - Method and apparatus for transmitting synchronization signals in a network of synchronous digital hierarchy - Google Patents

Method and apparatus for transmitting synchronization signals in a network of synchronous digital hierarchy

Info

Publication number
DK0554268T3
DK0554268T3 DK91916901.1T DK91916901T DK0554268T3 DK 0554268 T3 DK0554268 T3 DK 0554268T3 DK 91916901 T DK91916901 T DK 91916901T DK 0554268 T3 DK0554268 T3 DK 0554268T3
Authority
DK
Denmark
Prior art keywords
beat
synchronous
network
signals
virtual container
Prior art date
Application number
DK91916901.1T
Other languages
Danish (da)
Inventor
Reginhard Pospischil
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of DK0554268T3 publication Critical patent/DK0554268T3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • 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
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0003—Switching fabrics, e.g. transport network, control network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/006—Fault tolerance and recovery

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

In a network of the synchronous-digital hierarchy (SDH), synchronisation signals at standard frequency must be transmitted from one network node (NK1) with a frequency standard (FN) to all the other network nodes (NK2-NK8) in STM-N signals. They are to be the beat of the STM-N signals. If all beats are lost in a network node (N1-N8) along the transmission path of the synchronous beat this node, in holdover mode, generates its own beat at a frequency which no longer corresponds to that of the synchronous beat and is less stable. The next node does not recognise this fault. If it contains a cross-connect device not even a message is any use because it has devices for deriving the synchronous beat only at fixed inputs and what is received at another input is no use to it. If, instead, according to the invention, the beat of a virtual container is used as the synchronous beat, it can be received at any input since the assessment of the virtual container takes place with the cross-connect device only on the output side and there the virtual container is taken parallel to a synchronisation signal recovery arrangement.
DK91916901.1T 1990-10-22 1991-10-02 Method and apparatus for transmitting synchronization signals in a network of synchronous digital hierarchy DK0554268T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4033557 1990-10-22

Publications (1)

Publication Number Publication Date
DK0554268T3 true DK0554268T3 (en) 1997-03-17

Family

ID=6416805

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91916901.1T DK0554268T3 (en) 1990-10-22 1991-10-02 Method and apparatus for transmitting synchronization signals in a network of synchronous digital hierarchy

Country Status (10)

Country Link
EP (1) EP0554268B1 (en)
AT (1) ATE147213T1 (en)
AU (1) AU8625391A (en)
DE (1) DE59108457D1 (en)
DK (1) DK0554268T3 (en)
ES (1) ES2096659T3 (en)
GR (1) GR3022219T3 (en)
MX (1) MX9101674A (en)
PT (1) PT99288A (en)
WO (1) WO1992007433A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2100797B1 (en) * 1994-04-11 1997-12-01 Telefonica Nacional Espana Co NETWORK TERMINATOR WITH ASYNCHRONOUS TRANSFER MODE.
DE19653261A1 (en) * 1996-12-20 1998-06-25 Alsthom Cge Alcatel Synchronous digital message transmission system, control device, network element and central clock generator
DE19901588A1 (en) * 1999-01-16 2000-07-20 Alcatel Sa Synchronization of a network element in a synchronous digital communication network

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964112A (en) * 1988-06-01 1990-10-16 Siemens Aktiengesellschaft Method for monitoring the quality of a digital signal in sections of a data transmission circuit

Also Published As

Publication number Publication date
DE59108457D1 (en) 1997-02-13
PT99288A (en) 1994-01-31
GR3022219T3 (en) 1997-04-30
WO1992007433A1 (en) 1992-04-30
MX9101674A (en) 1992-06-05
EP0554268B1 (en) 1997-01-02
ES2096659T3 (en) 1997-03-16
AU8625391A (en) 1992-05-20
EP0554268A1 (en) 1993-08-11
ATE147213T1 (en) 1997-01-15

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