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WO2002035749A3 - Optical communications network and node for forming such a network - Google Patents

Optical communications network and node for forming such a network Download PDF

Info

Publication number
WO2002035749A3
WO2002035749A3 PCT/GB2001/004601 GB0104601W WO0235749A3 WO 2002035749 A3 WO2002035749 A3 WO 2002035749A3 GB 0104601 W GB0104601 W GB 0104601W WO 0235749 A3 WO0235749 A3 WO 0235749A3
Authority
WO
WIPO (PCT)
Prior art keywords
protection
fiber
fibers
working
bandwidth
Prior art date
Application number
PCT/GB2001/004601
Other languages
French (fr)
Other versions
WO2002035749A2 (en
Inventor
Christopher Purse
Original Assignee
Nortel Networks Ltd
Christopher Purse
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 Nortel Networks Ltd, Christopher Purse filed Critical Nortel Networks Ltd
Priority to EP01976459A priority Critical patent/EP1354439A2/en
Priority to AU2001295729A priority patent/AU2001295729A1/en
Priority to CA002426857A priority patent/CA2426857A1/en
Publication of WO2002035749A2 publication Critical patent/WO2002035749A2/en
Publication of WO2002035749A3 publication Critical patent/WO2002035749A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection
    • H04J14/0295—Shared protection at the optical channel (1:1, n:m)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0283—WDM ring architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0284—WDM mesh architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0011—Construction using wavelength conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0007—Construction
    • H04Q2011/0024—Construction using space switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0039—Electrical control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0052—Interconnection of switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects
    • H04Q2011/0092—Ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

An optical network has adjacent pairs of nodes in a ring connected by a working optical fiber or fibers and by a protection optical fiber or fibers of lower bandwidth. Each node comprises an optical switching arrangement for switching signals from at least one external input to the node onto a protection fiber, each node further comprising a detector for detecting signal failure or degradation on the or each incoming working fiber. The optical switching is controlled in dependence on the detected signal failure or degradation. An optically switched protected ring configuration is thereby provided with shared protection allocation, for example 1:n protection. The sharing of protection bandwidth between greater bandwidth working fibers improves the fiber efficiency. This requires the signals on the working fibers to be allocated a level of service, so that premium channels are protected against cable failure because they have the lower protection bandwidth allocated to them.
PCT/GB2001/004601 2000-10-25 2001-10-12 Optical communications network and node for forming such a network WO2002035749A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01976459A EP1354439A2 (en) 2000-10-25 2001-10-12 Optical communications network and node for forming such a network
AU2001295729A AU2001295729A1 (en) 2000-10-25 2001-10-12 Optical communications network and node for forming such a network
CA002426857A CA2426857A1 (en) 2000-10-25 2001-10-12 Optical communications network and node for forming such a network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69606700A 2000-10-25 2000-10-25
US09/696,067 2000-10-25

Publications (2)

Publication Number Publication Date
WO2002035749A2 WO2002035749A2 (en) 2002-05-02
WO2002035749A3 true WO2002035749A3 (en) 2003-08-28

Family

ID=24795580

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004601 WO2002035749A2 (en) 2000-10-25 2001-10-12 Optical communications network and node for forming such a network

Country Status (4)

Country Link
EP (1) EP1354439A2 (en)
AU (1) AU2001295729A1 (en)
CA (1) CA2426857A1 (en)
WO (1) WO2002035749A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10318426B4 (en) * 2003-04-23 2005-12-15 Siemens Ag Method and arrangement for protection switching and monitoring in a data transmission system
CN100454879C (en) * 2005-01-14 2009-01-21 华为技术有限公司 Self-recovery method and system in shared protection of optical channel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651528A1 (en) * 1993-10-29 1995-05-03 Siemens Aktiengesellschaft Optical transparent ring network with redundant paths
EP0920153A2 (en) * 1997-11-28 1999-06-02 Nec Corporation Ring network for sharing protection resource by working communications paths
EP0928082A1 (en) * 1997-12-31 1999-07-07 PIRELLI CAVI E SISTEMI S.p.A. Method and apparatus for transparent optical communication with two-fiber bidirectional ring with autoprotection and management of low priority traffic
EP0949777A2 (en) * 1998-04-08 1999-10-13 Nortel Networks Corporation Path switched shared protection
EP1014613A2 (en) * 1998-12-23 2000-06-28 Nortel Networks Corporation Shared optical protection in an optical communications network

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651528A1 (en) * 1993-10-29 1995-05-03 Siemens Aktiengesellschaft Optical transparent ring network with redundant paths
EP0920153A2 (en) * 1997-11-28 1999-06-02 Nec Corporation Ring network for sharing protection resource by working communications paths
EP0928082A1 (en) * 1997-12-31 1999-07-07 PIRELLI CAVI E SISTEMI S.p.A. Method and apparatus for transparent optical communication with two-fiber bidirectional ring with autoprotection and management of low priority traffic
EP0949777A2 (en) * 1998-04-08 1999-10-13 Nortel Networks Corporation Path switched shared protection
EP1014613A2 (en) * 1998-12-23 2000-06-28 Nortel Networks Corporation Shared optical protection in an optical communications network

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FANG X ET AL: "ALL-OPTICAL FOUR-FIBER BIDIRECTIONAL LINE-SWITCHED RING", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE. NEW YORK, US, vol. 17, no. 8, August 1999 (1999-08-01), pages 1302 - 1308, XP000908967, ISSN: 0733-8724 *
MIYAZAKI T ET AL: "A DEMONSTRATION OF AN OPTICAL SWITCH CIRCUIT WITH BRIDGE AND SWITCH FUNCTION IN WDM FOUR-FIBER RING NETWORKS", IEICE TRANSACTIONS ON ELECTRONICS, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. E82-C, no. 2, February 1999 (1999-02-01), pages 274 - 281, XP000893483, ISSN: 0916-8524 *

Also Published As

Publication number Publication date
CA2426857A1 (en) 2002-05-02
EP1354439A2 (en) 2003-10-22
AU2001295729A1 (en) 2002-05-06
WO2002035749A2 (en) 2002-05-02

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