Reseaech On Multidimensional Programmable Optical Switching Node Technology And Network Performance

In recent years,with the development of technologies such as cloud computing,data centers,and 5G,people’s demand for network capacity has continued to expand.As an important carrier of information transmission,optical networks have also developed from wavelength division multiplexing to space division multiplexing and multi-band transmission to provide more powerful information carrying capabilities.In order to achieve flexible and efficient network transmission,multi-dimensional optical switching nodes need to implement important operations such as traffic forwarding,signal relay,signal add/drop to/from the network,and are at the core of the optical transmission network.However,as space division multiplexing technology introduces more spatial resources into the optical network,optical switching nodes need to be equipped with a larger number of functional components and ports to support more complex multi-dimensional switching,which increases the complexity of node implementation and is unacceptable in terms of cost and power consumption.Architecture-on-demand nodes can solve the above problems,but their slow configuration speed makes it difficult to apply to services that require high latency.At the same time,there is currently a lack of quantitative analysis methods for node flexibility under space division multiplexing,so that related research is limited to qualitative discussion of flexibility and is difficult to deepen.In order to solve the above problems,this paper proposes a hybrid optical backplane based on a micro-electromechanical system and a semiconductor optical amplifier switch to meet the delay-sensitive business requirements.At the same time,to quantitatively analyze the flexibility of switching nodes in space-division multiplexing scenarios,an analysis method for the flexibility of reconfigurable optical add-drop multiplexers is proposed in this paper.By further extending this method,we propose the concept and evaluation index of the flexibility of optical fiber links,so as to distinguish the switching speed of different types of links in the on-demand structure node.Based on the concept of new hybrid backplane structure and flexibility,this paper proposes fragment and flexibility-aware routing,spectrum and core allocation algorithms to enhance network performance through the combination of structure and algorithm.We calculated the flexibility of the reconfigurable optical adddrop multiplexer under different network conditions of spatial division multiplexing to obtain the conditions required for a flexible switching node.Finally,we conduct network simulations on reconfigurable optical adddrop multiplexers and architecture-on-demand nodes using hybrid backplane structures under different network conditions and calculate the required The number of wavelength selective switch ports.The results show that the hybrid backplane structure can significantly reduce the number of required ports,while having better network performance.