Wyniki 1-1 spośród 1 dla zapytania: authorDesc:"Tomasz MROZEK"

The use of convolutional neural networks for simultaneous monitoring of chromatic dispersion and Optical to Signal Noise Ratio in the physical layer of the optical network DOI:10.15199/59.2019.3.3

  1. Intr oducti on According to the guidelines of the International Telecommunication Union (ITU), the most important parameters in the design of optical networks are chromatic dispersion (CD) and polarization (PMD), optical to signal noise ratio (OSNR), crosstalk and attenuation. For the management, monitoring and diagnostics of optical connections, CD, PMD and OSNR are the most key measurable parameters. The parameters of the CD and PMD are crucial during the modernization of the network, enabling proper tuning of the devices or increasing the range. OSNR is in turn, important in designing and maintaining the correct operation of optical links, because its value clearly translates into the level of errors in the channel. Table 1 presents required levels of accuracy for key monitored parameters. ??Table 1. The level of accuracy required for the parameter being monitored [1] ??Tabela 1. Poziom dokładności wymagany dla monitorowanego parametru Monitored parameter Accuracy required CD < ± 2% PMD < ± 2% OSNR < ± 0.5 dB These phenomena occur in the physical layer of the optical network. To be able to ensure the proper quality and correctness of transmission, they should be constantly monitored. Phenomena may occur simultaneously, therefore it is important to provide an appropriate method that will allow simultaneous monitoring and determination of individual disturbance values. Early techniques allowed for the measurement of these phenomena, but to a limited extent and in an individual way for each phenomenon. This involved the necessity of using several methods at the same time, which resulted in an increase in the operating costs and maintenance of the monitoring system as well as an increase in the complexity of the measurement system. Along with the development of optical networks, new methods have been proposed and introduced, which by their action began to include simultaneous monitoring of many phenomena[...]

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