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Space-memory-memory Clos-network switches with in-sequence service

机译：具有按序服务的空间存储器闭合网络交换机

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摘要

Clos-network switches have attracted a lot of attention because of their modularity and scalability. However, out-of-sequence problems weigh heavily against the application of buffered Clos-network switches. A space-memory-memory (SMM) Clos-network switch is proposed in this study which is able to provide in-sequence service. There are two features in the proposed switch which are different from the previously proposed schemes. First, two-stage load-balanced Birkhoff-von Neumann (LB-BvN) switches are adopted for each second-stage module. Second, no inter-stage matching is needed. The key idea to provide in-order cell delivery in the proposed SMM Clos-network switch is that cells belonging to the same flow will experience the identical delay when passing through the LB-BvN switches at the second stage, and arrive at their destined third-stage module in order. Each switching module operates independently, which makes the proposed SMM Clos-network switch practical to implement in hardware. Simulations show that the proposed switch can achieve high performance under both Bernoulli and Bursty arrival traffic.
机译：Clos网络交换机由于其模块化和可扩展性而吸引了很多关注。但是，失序问题严重影响了缓冲Clos网络交换机的应用。本研究提出了一种空间记忆闭合网络交换器，该交换器能够提供顺序服务。所提出的开关中有两个特征与先前提出的方案不同。首先，每个第二级模块采用两级负载平衡的伯克霍夫-冯·诺伊曼（LB-BvN）开关。第二，不需要阶段间匹配。在建议的SMM Clos网络交换机中提供有序信元传递的关键思想是，属于同一流的信元在第二阶段通过LB-BvN交换机并到达其预定的第三局时将经历相同的延迟。阶段模块。每个交换模块独立运行，这使得所建议的SMM Clos网络交换器很容易在硬件中实现。仿真表明，所提出的交换机在伯努利和Bursty到达流量下都可以实现高性能。

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