  In Future Internet it is possible to change elements of congestion 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 adjusting 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 measure of congestion of a network path, replacing
the erratically fluctuating packet loss. We demonstrate that with choosing
various RRR based feedback functions the optimum is reached with adjustable
congestion level. The proposed method guarantees fair bandwidth sharing of
competitive flows. Finally, we present testbed experiments to demonstrate the
performance of the algorithm.
