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.