Flexible Topology Migration in Optical Cross Add and Drop Multiplexer in Metropolitan Ring Network
In general, there are two types of optical node that used in present optical network where it depends on what type of topology that is implemented. OXC-based optical node is selected as a node distribution in the mesh network while OADM-based optical node is suitable for use in ring topology network. The selection of types of nodes depends on several factors such as signal movement format, its main function and also the security scheme used. Security scheme for node protection of ring topology is dedicated and shared protection. In addition, OADM nodes meet these security requirements by providing a mechanism for linear protection and ring protection.