Router Aided Congestion Avoidance with Scalable Performance Signaling

Abstract. This paper justifies using explicit performance signaling in support of congestion control by means of a simple yet efficient scheme called “Congestion Avoidance with Distributed Proportional Control (CADPC)”. It thereby contradicts a common belief that no additional forward traffic should be sent by such mechanisms. CADPC, which solely relies on rare bandwidth feedback from routers, is shown to outperform several TCP-friendly mechanisms and TCP “flavors ” in various aspects in simulations; its robustness against RTT fluctuations and loss from link noise makes it particularly well suited for heterogeneous network scenarios.