分析了光突發交換網絡核心交換節點的基本交換結構、交換控制模塊的主要功能以及核心交換模塊的構成；對光突發交換系統進行了仿真平臺的構建，討論了系統仿真中所使用的主要模塊及其功能、所涉及的關鍵技術，給出了所構建的仿真平臺和可以設置的參數；在多種交換方式下，分別建立了核心交換節點仿真模型，并進行了仿真；討論了采用不同交換結構對光突發丟失率性能的影響。
關 鍵 詞 光突發交換; 核心交換節點; 可調波長變換器; 光纖延遲器

Abstract The basic architecture of optical burst switching network core switch node is briefly presented in this paper. The function of switch control module and the structure of core switch node are introduced in brief. Constructing the simulation platform of OBS system is presented. This paper introduces the function of main modules in OBS system, the key technologies involved and the parameters which can be configured. Several structures of OBS core switch node simulation module are built in this paper. Simulation results and analysis of the network performance are also presented. This paper analysis the impaction of burst lost ratio by using different switching structures.
Key words optical burst switching; core switch node; tunable wavelength converter; fiber delay line