Network with line monitoring system

Details Network with line monitoring system Network with line monitoring system

H - Electricity

04

B

H04B 17/00 (2006.01) H04B 10/08 (2006.01)

Patent

CA 2114729

2114729 9307687 PCTABS00021 A system for monitoring a network in which a station (1) connected to the network includes a transmitter (2) and a receiver (3). The transmitter (2) outputs a signal modulated with outgoing traffic onto the network and the receiver (3) receives a signal from the network modulated with incoming traffic. The station (1) includes a monitoring circuit (7). The monitoring circuit (7) introduces a variable delay in a signal from the transmitter (2) and combines the delayed signal with the received signal so as to produce an output dependent upon the correlation of the signal from the transmitter (2) and the received signal at the given delay. In a preferred example, the network is an optical network and the delay is introduced by a programmable delay line.

L'invention est un système servant à surveiller un réseau dans lequel une station (1) connectée à ce réseau comprend un émetteur (2) et un récepteur (3). Cet émetteur (2) transmet sur le réseau un signal modulé avec le trafic et le récepteur (3) reçoit du réseau un signal modulé avec le trafic incident. La station (1) comprend un circuit de surveillance (7). Ce circuit de surveillance (7) introduit un retard variable dans un signal provenant de l'émetteur (2) et combine le signal retardé avec le signal reçu pour produire un signal de sortie qui dépend de la corrélation du signal provenant de l'émetteur (2) et du signal reçu au retard donné. Dans une concrétisation privilégiée de l'invention, le réseau est un réseau optique et le retard est introduit au moyen d'une ligne de retardement programmable.

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