The OSU Scheme for Congestion Avoidance in ATM networks Using Explicit Rate Indication

Congestion in computer networks occurs whenever the total input tra c is greater than the total output tra c. When congestion occurs, sources of congestion must reduce their tra c. Sources learn about congestion either through feedback from the bottleneck or through source timeout. When a source receives congestion indication, it reduces its rate or window size. The traditional goals of congestion control schemes were to achieve high throughput and low delay. Some schemes like DECbit [5] achieve fairness between sources, while others like TCP slow start do not. A distinguishing feature in the former is that explicit feedback of one bit is used.