Computer communication Networks

This research has considered the problem of designing a simple and robust queue control function for switch scheme. A switch scheme tries to maximize utilization, minimize queuing delay and give max-min fair rates to the sources. It is also desirable to have fewer oscillations in rates and queue length to support multimedia over ABR service.The research assumes a switch scheme model that dynamically adjusts the rate of the sources to match output rate and drain large queues. The design considerations were discussed with analytical explanations, four different queue control functions were presented, and the choices of parameters for queue control functions were explored analytically and through general computer program . The results showed that even in complex configuration (GFC-2), the system behavior was consistent with the analytical explanation.When the step function is used, the system oscillates and does converge in most cases, from both analytical and computer program results it can be concluded that the inverse hyperbolic is the best queue control function followed by the hyperbolic and