First , this paper presents some obs core node switch architectures . especially , analyses different switch and conflicting ability with different switch architectures . then this paper research a new switch architecture , . with simulation results , it compare with other artchitecture ’ s performances 首先,本文介绍了现有的几种obs核心节点交换结构,主要分析了不同twc 、 fdl配置和不同交换矩阵所组成的交换结构在交换能力和冲突情况上的不同。