Optical and electrical combined monitoring apparatus and method in optical transmitting network

Abstract

The invention relates to an electric and optical combination monitor device and the method thereof. The device includes an optical line selector, an optical channel selector, an optical power splitter, an electric layer performance monitor device, an optical layer performance monitor device and a micro controller. Wherein, the optical line selector is used to select the line to be monitored from a plurality of optical fiber lines; the optical channel selector is used to select the optical channel to be monitored from the optical line; the optical power splitter is used to split the optical channel signal into two parts, one of which enters into the electric layer performance monitor device for electric layer performance monitoring, the other of which enters into the optical layer performance monitor device for optical layer performance monitoring; the electric layer performance monitor device is used to monitor the overhead of OUT and ODU; the optical layer performance monitor device is used to monitor the optical power, wavelength, optical signal to noise ratio and other related optical parameters; the micro controller controls the optical line selector and the optical channel selector according to the network management command, and analyzes and processes the data gathered form the electric layer and optical layer, then reports to the network management system.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to a device and a method for realizing signal transmission performance monitoring and wavelength tracking in an optical transport network (OTN). Background technique [0002] With the development of optical fiber communication technology, WDM technology and commercial systems are progressing rapidly. By increasing the channel rate, increasing the number of multiplexed wavelengths and expanding the range of applied wavelengths, the transmission capacity of WDM systems can continue to grow. From the advantages of optical fiber communication and the development trend of future technology, the optical communication network based on WDM transmission will definitely occupy a dominant position in the entire backbone network [0003] The OTN optical network integrated with WDM transmission function is an ideal solution for large-grained service transmission, ...

AI Technical Summary

Problems solved by technology

[0008] Since the bit error rate of the service signal is the ultimate indicator of optical network transmission performance, OPM cannot monitor the bit error rate, and factors such as dispersion, polarization mode dispersion, and fiber nonlinearity in optical fiber links that cause transmission performance degradation cannot be monitored by OPM. It is reflected in the parameters, and at the same time, OPM cannot determine the wavelength routing in the optical switching node

[0009] Because the cost of monitoring the bit error rate and routing information of multiple wavelengths of high-speed service signals at the electrical layer is quite high, in order to solve this problem, the industry usually adopts a pilot method, that is, adding low-frequency amplitude modulation to the optical channel for monitoring. The disadvantage of the method is that the transmission performance of the pilot signal cannot truly reflect the transmission performance of the service signal, and has a certain impact on the transmission performance

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