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1. WO2002007348 - HYBRID OPTICAL SHARED PROTECTION RING

Publication Number WO/2002/007348
Publication Date 24.01.2002
International Application No. PCT/US2001/022298
International Filing Date 16.07.2001
Chapter 2 Demand Filed 19.02.2002
IPC
H04J 14/02 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
CPC
H04J 14/0212
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0201Add-and-drop multiplexing
0202Arrangements therefor
021Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
0212using optical switches or wavelength selective switches [WSS]
H04J 14/0283
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0278WDM optical network architectures
0283WDM ring architectures
H04J 14/0295
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0287Protection in WDM systems
0293Optical channel protection
0295Shared protection at the optical channel (1:1, n:m)
Applicants
  • CORNING INCORPORATED [US]/[US]
Inventors
  • LI, Ming-Jun
  • SOULLIERE, Mark J
Agents
  • REDMAN, Mary Y
Priority Data
09/619,08017.07.2000US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) HYBRID OPTICAL SHARED PROTECTION RING
(FR) ANNEAU DE PROTECTION PARTAGEE A OPTIQUE HYBRIDE
Abstract
(EN) A wavelength add drop multiplexer (WADM) has a unique 4X4 switching matrix configuration that is capable of supporting a 2-fiber ring architecture. A first 4X4 switching matrix is optically coupled to a first incoming fiber carrying a first incoming optical transport signal of n channels (OTSn) and a second incoming fiber carrying a second incoming OTSn. The first 4X4 switching matrix routes a working channel of the first incoming OTSn and a protection channel of the second incoming OTSn based on a desired switching configuration. The WADM further includes a second 4X4 switching matrix optically coupled to the first incoming fiber and the second incoming fiber. The second 4X4 switching matrix routes a protection channel of the first incoming OTSn and a working channel of the second incoming OTSn based on the desired switching configuration. The WADM also has a control system for establishing the switching configuration of the matrices. Routing working traffic and protection traffic from a single fiber to a pair of 4X4 switching matrices ultimately allows for simultaneous protection from multi-channel failures and single channel failures.
(FR) L'invention concerne un multiplexeur WADM (wavelength add drop multiplexer) qui possède une configuration de matrice de commutation 4X4 unique et capable de supporter une architecture en anneau à 2 fibres. Une première matrice de commutation 4X4 est couplée optiquement à une première fibre entrante portant un premier signal de transport optique entrant de n canaux (OTSn) et une seconde fibre entrante portant un second signal de n canaux (OTSn). La première matrice de commutation 4X4 achemine un canal de fonctionnement des premiers OTSn entrants et un canal de protection des seconds OTSn, à partir de la configuration de commutation désirée. Le WADM comprend également une seconde matrice de commutation 4X4 couplée optiquement à la première fibre entrante et à la seconde fibre entrante. La seconde matrice de commutation 4X4 achemine un canal de protection des premiers OTSn entrants et un canal de fonctionnement des seconds OTSn entrants à partir de la configuration de commutation désirée. Le WADM possède également un système de commande permettant d'établir la configuration de commutation des matrices. Le trafic de fonctionnement d'acheminement et le trafic de protection à partir d'une fibre unique vers une paire de matrices de commutation 4X4 permet d'obtenir finalement une protection simultanée provenant de défaillances multi-canaux et aussi de défaillances de canal unique.
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