中文摘要：

本文采用带缓存交叉开关作为核心交换单元，构建了一种空分复用扩展的联合输入／交叉节点／输出排队（SDM—CICOQ）交换结构，从理论上证明了当扩展因子为2时，SDM-CICOQ交换结构可以获得100％的吞吐量，并且能够完全模拟输出排队（OQ）交换结构，从而能够提供服务质量（QoS）保障．本文还给出了一种层次化优先级调度（HPS）方案作为SDM-CICOQ交换结构调度机制的工程设计参考，仿真结果表明采用HPS调度方案SDM—CICOQ交换结构可获得良好的性能．

英文摘要：

Using buffered crossbar as a core switch fabric, we build a combined input-cmsspoint-output queued switch with space-division multiplexing expansion （denoted as SDM CICOQ switch） in this paper. It is proved that an SDM CICOQ switch with an expansion factor 2 can achieve 100% throughput and exactly emulate an OQ switch. Thus,SDM CICOQ switches can provide QoS guarantees for Iraffic flows. For the simplicity of implementation, we also present a hierarchical priority scheduling （HPS） scheme as a reference designing for the scheduling policy of the SDM CICOQ switch. Simulation results show that the SDM CICOQ switch operating under the HPS scheduling scheme can obtain good performance.