高速带来小缓存:路由的空间带宽权衡
With Great Speed Come Small Buffers: Space-Bandwidth Tradeoffs for Routing
摘要:
我们考虑的对抗性攻击理论(AQT)模型,其中数据包到达受到最大平均速率$0\leρ\le1$和突发性$σ\ge0$。在这个模型中,我们分析了所需的缓冲区的大小,以避免溢出的基本情况下的path. Our主要结果所需的平均速率和不同的目的地的数量的空间特征:我们表明,$O(k d^{1/k})$空间足够,其中$d$是不同的目的地和$k=\lfloor 1/ρ\rfloor$的数量;我们表明,$Ω(\frac 1 k d^{1/k})$空间是必要的。对于有向树,我们描述了一个算法,其缓冲区空间的要求是在最多$1 + d' + σ$,其中$d'$是任何根叶路径上的目的地的最大数量。
英文摘要:
We consider the Adversarial Queuing Theory (AQT) model, where packet arrivals are subject to a maximum average rate $0\leρ\le1$ and burstiness $σ\ge0$. In this model, we analyze the size of buffers required to avoid overflows in the basic case of a path. Our main results characterize the space required by the average rate and the number of distinct destinations: we show that $O(k d^{1/k})$ space suffice, where $d$ is the number of distinct destinations and $k=\lfloor 1/ρ\rfloor$; and we show that $Ω(\frac 1 k d^{1/k})$ space is necessary. For directed trees, we describe an algorithm whose buffer space requirement is at most $1 + d' + σ$ where $d'$ is the maximum number of destinations on any root-leaf path.
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