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High-Performance Interconnects, Symposium on (2007)
Stanford, CA
Aug. 22, 2007 to Aug. 24, 2007
ISSN: 1550-4794
ISBN: 0-7695-2979-8
pp: 91-98
Nandita Dukkipati , Stanford University
Glen Gibb , Stanford University
Nick McKeown , Stanford University
Jiang Zhu , Stanford University
<p>We recently proposed the Rate Control Protocol (RCP) as way to minimize download times (or flow-completion times). Simulations suggest that if RCP were widely deployed, downloads would frequently finish ten times 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.</p> <p>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 some scientific and repeatable experiments with RCP, we have built and tested an open and public implementation of RCP; we have made available both the endhost software, and the router hardware.</p> <p>In this paper we describe our end-host implementation of RCP in Linux, and our router implementation in Verilog (on the NetFPGA platform). We hope that others will be able to use these implementations to experiment with RCP and further our understanding of congestion control.</p>

G. Gibb, J. Zhu, N. Dukkipati and N. McKeown, "Building a RCP (Rate Control Protocol) Test Network," 2007 15th IEEE Symposium on High Performance Interconnects(HOTI), Stanford, CA, 2007, pp. 91-98.
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