Modelling and stability of FAST TCP
Modelling and stability of FAST TCP
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DOI：
10.1109/infcom.2005.1498323
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
Jiantao Wang;D. X. Wei;S. Low
中科院分区：
文献类型：
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作者：
Jiantao Wang;D. X. Wei;S. Low
我们引入了 FAST TCP 的离散时间模型，该模型充分捕捉了自时钟的影响，并将其与传统的连续时间模型进行了比较。虽然连续时间模型预测反馈延迟较大时共享单个链路的同质源的不稳定性，但实验表明情况并非如此。使用离散时间模型，我们证明当所有源具有共同的往返反馈延迟时，无论延迟有多大，FAST TCP 在一般网络中都是局部渐近稳定的。我们还证明了在没有反馈延迟的情况下单个瓶颈链路的全局稳定性。这里开发的技术是新的并且适用于其他协议。
We introduce a discrete-time model of FAST TCP that fully captures the effect of self-clocking and compare it with the traditional continuous-time model. While the continuous-time model predicts instability for homogeneous sources sharing a single link when feedback delay is large, experiments suggest otherwise. Using the discrete-time model, we prove that FAST TCP is locally asymptotically stable in general networks when all sources have a common round-trip feedback delay, no matter how large the delay is. We also prove global stability for a single bottleneck link in the absence of feedback delay. The techniques developed here are new and applicable to other protocols.