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1. EP1884045 - OPTICAL NETWORK RESTORATION TECHNIQUE

Office
European Patent Office
Application Number 06761941
Application Date 26.05.2006
Publication Number 1884045
Publication Date 06.02.2008
Publication Kind A2
IPC
H04B 10/213
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
12Transmission through light guides, e.g. optical fibres
20Arrangements for networking, e.g. bus or star coupling
213using a T-type coupler
H04B 10/08
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
02Details
08Equipment for monitoring, testing or fault measuring
H04B 10/17
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
12Transmission through light guides, e.g. optical fibres
16Repeaters
17in which processing or amplification is carried out without conversion of the signal from optical form
CPC
H04B 10/296
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29Repeaters
291in which processing or amplification is carried out without conversion of the main signal from optical form
293Signal power control
294in a multiwavelength system, e.g. gain equalisation
296Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
H04B 10/03
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
03Arrangements for fault recovery
H04B 10/07
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
H04J 14/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
Applicants ERICSSON AB
Inventors BOGONI ANTONELLA
MAGRI ROBERTO
CECCATELLI RICCARDO
Designated States
Title
(DE) RESTAURATIONSTECHNIK FÜR EIN OPTISCHES NETZWERK
(EN) OPTICAL NETWORK RESTORATION TECHNIQUE
(FR) RESEAU OPTIQUE EN ANNEAU COMPRENANT UN PLURALITE D'AMPLIFICATEURS: PROCEDE ET DISPOSITIF DE RETABLISSEMENT DES CONDITIONS DE MARCHE APRES PANNE OU AUTRE DEFAILLANCE DUDIT RESEAU
Abstract
(EN) A method and apparatus for restoration of operating conditions of a WDM optical ring network comprising a plurality of amplifiers linked together in a ring after a break or fault has occurred in the network. The method comprises in response to repair of the break or other fault, increasing output power or /and pump power of an amplifier in the network such that the output power or/and pump power increases substantially in accordance with a ramp function.
(FR) Cette invention concerne un procédé et un dispositif permettant de rétablir les conditions de marche d'un réseau optique en anneau à MRL comprenant une pluralité d'amplificateurs reliés les uns aux autres après survenues d'une panne ou autre défaillance dans ce réseau. Suite à la réparation, la démarche consiste à augmenter la puissance de sortie et/ou la puissance de pompage d'un amplificateur du réseau sensiblement selon une fonction de rampe.