Demo: Coexistence of Low Delay and Loss-based Congestion Controls in SDN-based Networks

Congestion controls that focus on achieving a low queuing delay, such as the novel TCP LoLa, can significantly improve the quality-of-experience for delay-sensitive applications. The gradual deployment of such congestion controls, however, is challenging because their data flows get suppressed by flows that use a legacy loss-based congestion control (e.g. CUBIC TCP). This demo shows the advantages of TCP LoLa for interactive applications at the example of a network-enabled version of the well-known PONG game. In addition to that, the demo shows how SDN technology can be used to facilitate the coexistence between low delay and loss-based congestion controls.