Relative Rate Reduction Based Control with Adjustable Congestion Level
Péter Hága, Ferenc Tóth, István Csabai, Gábor Vattay · 2015
In Future Internet it is possible to change elements of con-gestion control in order to eliminate jitter and batch loss caused by the current control mechanisms based on packet loss events. We investigate the fundamental problem of ad-justing sending rates to achieve optimal utilization of highly variable bandwidth of a network path using accurate packet rate information. This is done by continuously controlling the sending rate with a function of the measured packet rate at the receiver. We propose the relative loss of packet rate between the sender and the receiver (Relative Rate Reduction, RRR) as a new accurate and continuous mea-sure of congestion of a network path, replacing the errat-ically fluctuating packet loss. We demonstrate that with choosing various RRR based feedback functions the opti-mum is reached with adjustable congestion level. The pro-posed method guarantees fair bandwidth sharing of com-petitive flows. Finally we present testbed experiments to demonstrate the performance of the algorithm.