Time and Frequency Synchronization for WDM Transmission System Parameters Monitoring

Future Generation Telecommunication Systems with Software Defined Network technology and Network Function Virtualization will use WDM transmission with automated parameters monitoring and control. For distributed WDM parameters control system it is very important to have high stabile time synchronization. This time synchronization cam be provided by two ways: centralized synchronization scheme and distributed synchronization scheme. This article made for describing WDM network parameters monitoring and different time synchronization ways comparison.