GB2287382A - A hierarchical synchronization method and a telecommunications system employing message-based synchronization - Google Patents

A hierarchical synchronization method and a telecommunications system employing message-based synchronization

Info

Publication number
GB2287382A
GB2287382A GB9509148A GB9509148A GB2287382A GB 2287382 A GB2287382 A GB 2287382A GB 9509148 A GB9509148 A GB 9509148A GB 9509148 A GB9509148 A GB 9509148A GB 2287382 A GB2287382 A GB 2287382A
Authority
GB
United Kingdom
Prior art keywords
synchronization
node
nodes
telecommunications system
hierarchical
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.)
Granted
Application number
GB9509148A
Other versions
GB9509148D0 (en
GB2287382B (en
Inventor
Jukka Kainulainen
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9509148D0 publication Critical patent/GB9509148D0/en
Publication of GB2287382A publication Critical patent/GB2287382A/en
Application granted granted Critical
Publication of GB2287382B publication Critical patent/GB2287382B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04J3/0679—Clock or time synchronisation in a network by determining clock distribution path in a network

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention relates to a hierarchical synchronization method for a telecommunications system employing message-based synchronization and comprising a plurality of nodes interconnected by transmission lines (A, B). In the method, the nodes interchange signals containing synchronization messages with information on the priority of the respective signal in the internal synchronization hierarchy of the system, and the node enters into a predetermined standard state for a preset time period in a change situation, such as a failure situation, in order to prevent the selection of faulty synchronization messages. In order to speed up the synchronization of the system in failure situations and to avoid any resettings in connection with system changes, the minimum duration of said time period is equal to a time (K) required for the neighbouring nodes of the node to be informed of the transition of the node into said standard state and to respond to the change and for the node itself to be informed by the neighbouring nodes about their response. <IMAGE>
GB9509148A 1992-11-09 1993-11-08 A hierarchical synchronization method and a telecommunications system employing message-based synchronization Expired - Fee Related GB2287382B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925073A FI91690C (en) 1992-11-09 1992-11-09 Hierarchical synchronization procedure and a data traffic system that uses message-based synchronization
PCT/FI1993/000456 WO1994011963A1 (en) 1992-11-09 1993-11-08 A hierarchical synchronization method and a telecommunications system employing message-based synchronization

Publications (3)

Publication Number Publication Date
GB9509148D0 GB9509148D0 (en) 1995-07-19
GB2287382A true GB2287382A (en) 1995-09-13
GB2287382B GB2287382B (en) 1996-09-25

Family

ID=8536181

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9509148A Expired - Fee Related GB2287382B (en) 1992-11-09 1993-11-08 A hierarchical synchronization method and a telecommunications system employing message-based synchronization

Country Status (5)

Country Link
AU (1) AU5422094A (en)
DE (1) DE4395759T1 (en)
FI (1) FI91690C (en)
GB (1) GB2287382B (en)
WO (1) WO1994011963A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004178B1 (en) * 1997-08-14 2003-03-05 Tellabs Denmark A/S A teletransmission network, network elements therefor and a method of identifying the synchronization of a network element
EP1673898A1 (en) * 2003-09-22 2006-06-28 Impsys Digital Security AB Data communication security arrangement and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142069A (en) * 1977-06-20 1979-02-27 The United States Of America As Represented By The Secretary Of The Army Time reference distribution technique
EP0262705A2 (en) * 1986-09-03 1988-04-06 Philips Patentverwaltung GmbH Arrangement for the nodes of a meshed telecommunication network
EP0435395A2 (en) * 1989-12-28 1991-07-03 Philips Patentverwaltung GmbH Hierarchical synchronization method for the nodes of a telecommunication network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142069A (en) * 1977-06-20 1979-02-27 The United States Of America As Represented By The Secretary Of The Army Time reference distribution technique
EP0262705A2 (en) * 1986-09-03 1988-04-06 Philips Patentverwaltung GmbH Arrangement for the nodes of a meshed telecommunication network
EP0435395A2 (en) * 1989-12-28 1991-07-03 Philips Patentverwaltung GmbH Hierarchical synchronization method for the nodes of a telecommunication network

Also Published As

Publication number Publication date
FI925073A0 (en) 1992-11-09
FI91690C (en) 1994-07-25
GB9509148D0 (en) 1995-07-19
GB2287382B (en) 1996-09-25
DE4395759T1 (en) 1995-09-21
WO1994011963A1 (en) 1994-05-26
AU5422094A (en) 1994-06-08
FI91690B (en) 1994-04-15

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20031108