Assessing LEDBAT's Delay Impact
Assessing LEDBAT's Delay Impact
复制标题
评估 LEDBAT 的延迟影响
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Welzl
中科院分区：
文献类型：
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作者：
David Ros;M. Welzl
LEDBAT拥塞控制机制的主要目标是限制它引起的排队延迟。通过模拟，我们展示了该机制的两个方面，这些方面有时会使LEDBAT的延迟影响非常显著：首先，它每10分钟更新一次它的“基本延迟”，但在这样做的过程中可能会测量自己的诱导延迟，即使在存在显著的传输抖动的情况下也是如此。如果运行足够长的时间，这可能会导致LEDBAT流产生的固定延迟持续增长。其次，它要求竞争流量持续时间长且贪婪，以便相应地降低其速率，然而，此类流量通常不是延迟关键型流量。
The major goal of the LEDBAT congestion control mechanism is to limit the amount of queuing delay that it causes. Using simulations, we show two aspects of the mechanism that may sometimes make LEDBAT's delay impact quite significant: first, it updates its "base delay" every 10 minutes, but may measure its own induced delay in doing so, even in the presence of significant transmission jitter. This may lead to a continuous growth of the fixed delay that a LEDBAT flow produces if it runs for long enough. Second, it requires competing traffic to be long-lived and greedy for it to reduce its rate accordingly, however, such traffic is in general not latency-critical.