R. F. DeMara, H. Zhu, and M. Poston, "Design and Analysis of rate-adaptive 
source quench congestion avoidance techniques," in Proceedings of the 1998 
International Symposium on Information Theory and Applications (ISITA'98), pp. 
572 - 575, Mexico City, Mexico, October 14 - 16, 1998.

Abstract:
A two-phase Rate-Adaptive Source Quench(RASQ) congestion avoidance scheme is 
developed and analyzed where sources make transmission rate adjustments based on 
the congestion signals sent explicitly by downstream network routing resources. 
Congestion avoidance is realized by adding feedback information to the existing 
Source Quench(SQ) packets to operate network loading near the optimal 'knee 
point'. First, a queue threshold of approximately 80% of the maximum queue 
capacity is used to trigger SQ transmission. Upon SQ receipt, sources adjust 
transmission rates using a two-phase feedback control. The control is based on 
multiplicative and then additive increases to source rate to optimize throughput 
while minimizing the packet loss rate. Simulation results indicate favorable 
performance over a variety of network configuration and loading scenarios.