Research In The Traffic Grooming Of Optical Core Network

In the past two decades, the sustained pattern of exponential data traffic growths has completely transformed the landscape of the modern telecommunication network. Initially, the increases in capacity demands were successfully met by deployment of wavelength-division multiplexing(WDM) technology.However, as the research keeps moving forward, capacity of conventional single-mode fiber system is not expected to grow much further. It’s explained by recent studies on the nonlinear Shannon capacity of optical networks. The research experiments have approached their fundamental limits.In order to deal with the approaching capacity crunch, in a more economic and sustainable fashion, the space-division multiplexing(SDM) technology was proposed. It was proved to be an efficient way to cope with the Shannon capacity faced by the single-mode fiber system. However, today’s research hotspot on SDM is the SDM optical transmission systems and their corresponding components. To fully utilize the capacity boost served by SDM in optical network, the research has to be taken out.Therefore, this article mainly study the utilization of SDM in optical network, by investigating the implementation of switch node in the architecture and corresponding traffic grooming methods.In order to have a reference of the traffic grooming methods, the classic traffic methods are then investigated and compared.The architecture of switch node is then discussed. After that, a conclusion is drawn that node has to be able to switch traffic with multi-granularity. Then a scheme based on AoD(Architecture on Demand) is given, which serves as a basis of the traffic grooming method.At last, the traffic grooming method is proposed and simulated.