WO2002011296A3 - A fault protection scheme - Google Patents

A fault protection scheme Download PDF

Info

Publication number
WO2002011296A3
WO2002011296A3 PCT/GB2001/003400 GB0103400W WO0211296A3 WO 2002011296 A3 WO2002011296 A3 WO 2002011296A3 GB 0103400 W GB0103400 W GB 0103400W WO 0211296 A3 WO0211296 A3 WO 0211296A3
Authority
WO
WIPO (PCT)
Prior art keywords
switch
unit
signal
protection unit
array
Prior art date
Application number
PCT/GB2001/003400
Other languages
French (fr)
Other versions
WO2002011296A2 (en
Inventor
Kenneth Guild
Damian Cowell
Original Assignee
Ditech Comm Corp
Kenneth Guild
Damian Cowell
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 Ditech Comm Corp, Kenneth Guild, Damian Cowell filed Critical Ditech Comm Corp
Priority to AU2001275717A priority Critical patent/AU2001275717A1/en
Publication of WO2002011296A2 publication Critical patent/WO2002011296A2/en
Publication of WO2002011296A3 publication Critical patent/WO2002011296A3/en

Links

Classifications

    • 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
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • 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
    • H04J14/0287—Protection in WDM systems
    • H04J14/0297—Optical equipment protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
    • 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
    • H04Q2011/0043—Fault tolerance

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

In the present invention, an optical device comprises N working units (21) and a fault protection unit (20). The fault protection unit (20) includes an array of switches (26), each of which has an input port that receives a signal and couples a signal to a respective unit via an output port of the switch. A normally unused output port of one switch in the array is coupled to a normally unused input port of another switch in the array so that a change in switch state of one switch completes a signal protection path for the signal received at its input port through the other switch. The device includes a standby protection unit (24), wherein the signal protection patch is coupled to the protection unit. A change in switch state of a switch (26) is made in response to a detected failure of the respective working unit (21) so that the standby protection unit (24) can replace the faulty working unit. In the preferred implementation, the working units are optical transponders.
PCT/GB2001/003400 2000-07-28 2001-07-27 A fault protection scheme WO2002011296A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001275717A AU2001275717A1 (en) 2000-07-28 2001-07-27 A fault protection scheme

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0018626A GB0018626D0 (en) 2000-07-28 2000-07-28 A fault protection scheme
GB0018626.2 2000-07-28

Publications (2)

Publication Number Publication Date
WO2002011296A2 WO2002011296A2 (en) 2002-02-07
WO2002011296A3 true WO2002011296A3 (en) 2002-05-10

Family

ID=9896587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003400 WO2002011296A2 (en) 2000-07-28 2001-07-27 A fault protection scheme

Country Status (3)

Country Link
AU (1) AU2001275717A1 (en)
GB (1) GB0018626D0 (en)
WO (1) WO2002011296A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2405596B1 (en) * 2009-03-04 2018-08-08 Mitsubishi Electric Corporation Optical transmission apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638358A (en) * 1994-04-27 1997-06-10 Nec Corporation Protection switching system having impedance matching circuits
DE19737359A1 (en) * 1997-08-27 1999-03-04 Siemens Ag Communication device for the transmission of message signals
WO1999013656A1 (en) * 1997-09-08 1999-03-18 Koninklijke Kpn N.V. Interconnection system for optical networks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638358A (en) * 1994-04-27 1997-06-10 Nec Corporation Protection switching system having impedance matching circuits
DE19737359A1 (en) * 1997-08-27 1999-03-04 Siemens Ag Communication device for the transmission of message signals
WO1999013656A1 (en) * 1997-09-08 1999-03-18 Koninklijke Kpn N.V. Interconnection system for optical networks

Also Published As

Publication number Publication date
AU2001275717A1 (en) 2002-02-13
GB0018626D0 (en) 2000-09-13
WO2002011296A2 (en) 2002-02-07

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