OTN Virtual Concatenation Module Design And Achieve

In this paper, the method using OTN(Optical Transport Network) VCAT (Vitual Concatention) will bundle multiple virtual containers together to form one large container to achieve high-speed data signal delivery. Article in the detailed design the various modules of the client data from the mapping to the demapping available for transport, include: payload mapping module, overhead inserted module, overhead processing module, delay compensation module, switch module and demapping module. OTN VCAT static support bit-synchronous mapping mode and asynchronous mapping mode based on scenarios, for optimizing resources and scalability design. Software simulation and FPGA verification shows that this design can be cross-transmission of the correct client data in the conditions of less than 98us delay between Vitual Concatention Group and Vitual Concatention Group-wide switch, but also in asynchronous mapping mode, through the bytes of the offset adjustment can tolerate±65ppm to achieve the asynchronous OTN VCAT, which can not have to replace most of existing network equipment can support more high-speed data transmission, while providing a flexible allocation of bandwidth, to improve bandwidth efficiency in order to accommodate future high-speed data services, multi-service-oriented, packet-oriented requirements, reducing the cost of a network operator. This design has been applied in the Hisilicon SD875X series of chips.