Adaptive negative feedback congestion avoidance for ABR traffic in ATM networks

Conventional negative feedback schemes have overall network congestion collapse problems when returning resource management cells experience extreme congestion. These schemes use an interval-based approach, which increases the complexity of implementation and often becomes expensive. To resolve these problems without network performance degradation, an adaptive negative feedback congestion avoidance scheme is proposed. A simulation model is used to evaluate the scheme. Results indicate that the proposed scheme has a high throughput, exhibits fairness among contending sources, and achieves shorter queue lengths without congestion. The scheme also eliminates interval timers at the end systems and resolves the overall network congestion collapse problem.