P4-enabled Network-assisted Congestion Feedback
Anja Feldmann, B. Chandrasekaran, Seifeddine Fathalli, Emilia N. Weyulu · 2019
There exists an extensive body of work, spanning more than two decades, on congestion control schemes and signaling mechanisms. The majority of prior work does not, however, entertain the notion of network-assisted feedback for congestion control. The scope of the remaining work has also been, unfortunately, rather narrow: Some efforts limit themselves to using weak signals (involving a few bits in the header) and relying on receivers to reflect such signals to the sender; few others maintain per-flow statistics or explicitly set the rates the senders should use. Virtually all suggested network-assisted congestion feedback mechanisms are ineffective, not scalable, or limited to data-center contexts.