PCC: Re-architecting Congestion Control for Consistent High Performance

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• Michael Schapira, Hebrew University of Jerusalem
• Monday 25 April 2016, 11:00-12:00
• Auditorium, Microsoft Research Ltd, 21 Station Road, Cambridge, CB1 2FB.

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TCP and its variants have suffered from surprisingly poor performance for decades. We argue the TCP family has little hope to achieve consistent high performance due to a fundamental architectural deficiency: hardwiring packet-level events to control responses. We propose Performance-oriented Congestion Control (PCC), a new congestion control architecture. Under PCC , each sender continuously observes the connection between its actions and empirically experienced performance, enabling it to consistently adopt actions that result in high performance. Across many real-world and challenging environments, PCC shows consistent and often 10× performance improvement, with better fairness and stability than TCP . PCC requires no router hardware support or new packet format.

Joint work with Mo Dong, P. Brighten Godfrey, Qingxi Li, and Doron Zarchy

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