光突发交换核心节点的缓存结构设计

提出了光突发交换（OBS）核心节点上缓存结构的合理而高效的设计方案。在建立核心节点的突发流与突发竞争模型的基础上，提出缓存结构设计应满足的基本条件，进而义提出将缓存结构和交换结构相结合的集成结构方案；同时，通过归纳和扩展，提出缓存结构的多角度综合分类规则。分析和仿真结果显示，集成结构方案满足所提出的缓存设计基本条件，在不受成本等限制时，尽量使用光纤共享型，而且在同样的共享范围，输出型要比输入型好，特别是光纤共享情况更为明显。

Design of Buffer Structure at Core Node in Optical Burst Switching

Reasonable and effective buffer structures are proposed in core routers/nodes of optical burst switching. Based on the model of burst traffics and their contentions, the basic qualifications for designing the buffer structures are concluded. With these qualifications, the structures that integrate buffer with suitching are proposed, moreover, by conclusion and expansion,the classification rules of buffer structures are also proposed from different angles. The schemes of integrated stuctures are analyzed and simulated. The results show that the schemes satisfy the basic qualifications proposed in the paper,and fiber-shared structure should be used without considering the cost. Besides, with the same sharedrange,an output-buffered structure precedes an input-buffered one, especially for the fibershared structures.