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arXiv 1704.02302math.OC
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$2\times 2$输入端交换机的最优加权时延调度

Optimal Weighted-Delay Scheduling in $2\times 2$ Input-Queued Switches

Yingdong Lu, Siva Theja Maguluri, Mark S. Squillante, Tonghoon Suk, Xiaofan Wu

摘要:

出于一些延迟最优调度的结果,在吞吐量最优的结果相比,我们研究了一个典型的输入排队交换机调度问题,其目标是在无限的时间范围内最小化折扣延迟成本。我们推导出一个最佳的调度策略,并建立相应的理论性质,这是预期的兴趣更广泛的输入排队开关。计算实验证明和量化的好处,我们的最佳调度策略的替代政策,如变量的最大权重调度,众所周知的吞吐量最优,最近被证明是延迟最优的交通繁忙的制度限制。

英文摘要:

Motivated by few delay-optimal scheduling results, in comparison to results on throughput optimality, we investigate a canonical input-queued switch scheduling problem in which the objective is to minimize the discounted delay cost over an infinite time horizon. We derive an optimal scheduling policy and establish corresponding theoretical properties, which are expected to be of interest more broadly than input-queued switches. Computational experiments demonstrate and quantify the benefits of our optimal scheduling policy over alternative policies such as variants of MaxWeight scheduling, well-known to be throughput optimal and more recently shown to be delay optimal in the heavy-traffic regime limit.

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