Analysis of performance trade-offs for an adaptive channel-aware wireless scheduler
Analysis of performance trade-offs for an adaptive channel-aware wireless scheduler
复制标题
自适应信道感知无线调度器的性能权衡分析
DOI：
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发表时间：
2009
期刊：
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通讯作者：
H. Tan
中科院分区：
文献类型：
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作者：
R. Rom;H. Tan
在本文中，我们考虑调度问题，其中来自 K 个输入流的数据包需要通过异构无线信道传递到 K 个相应的无线接收器。我们的目标是设计一个无线调度器，实现良好的吞吐量和公平性能，同时最大限度地减少每个无线接收器的缓冲区要求。由于无线信道的独特特性，这是一个具有挑战性的问题。我们提出了一种在调度器设计中利用无线信道的长期和短期错误行为的新颖想法。除了典型的一阶服务质量 (QoS) 指标（例如吞吐量和平均延迟）之外，我们对调度程序的性能分析还允许评估高阶指标，这些指标是评估缓冲区要求所需的。我们表明，与仅使用瞬时信道状态或在异构信道中独立于信道状态的其他无线调度器相比，所提出的调度器的变体可以实现高总体吞吐量或公平性以及低缓冲区要求。
In this paper, we consider the scheduling problem where data packets from K input-flows need to be delivered to K corresponding wireless receivers over a heterogeneous wireless channel. Our objective is to design a wireless scheduler that achieves good throughput and fairness performance while minimizing the buffer requirement at each wireless receiver. This is a challenging problem due to the unique characteristics of the wireless channel. We propose a novel idea of exploiting both the long-term and short-term error behavior of the wireless channel in the scheduler design. In addition to typical first-order Quality of Service (QoS) metrics such as throughput and average delay, our performance analysis of the scheduler permits the evaluation of higher-order metrics, which are needed to evaluate the buffer requirement. We show that variants of the proposed scheduler can achieve high overall throughput or fairness as well as low buffer requirement when compared to other wireless schedulers that either make use only of the instantaneous channel state or are channel-state independent in a heterogenous channel.