Making Large Scale Deployment of RCP Practical for Real Networks

13 years 11 months ago

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—We recently proposed the Rate Control Protocol (RCP) as a way to minimize download times (or ﬂow-completion times). Simulations suggest that if RCP were widely deployed, downloads would frequently ﬁnish an order of magnitude faster than with TCP. This is because RCP involves explicit feedback from the routers along the path, allowing a sender to pick a fast starting rate, and adapt quickly to network conditions. RCP is particularly appealing because it can be shown to be stable under broad operating conditions, and its performance is independent of the ﬂow-size distribution and the RTT. Although it requires changes to the routers, the changes are small: The routers keep no per-ﬂow state or per-ﬂow queues, and the per-packet processing is minimal. However, the bar is high for a new congestion control mechanism – introducing a new scheme requires enormous change, and the argument needs to be compelling. And so, to enable incremental deployment of RCP, we have built and tes...

Chia-Hui Tai, Jiang Zhu, Nandita Dukkipati

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