Design of proportional congestion control for high-speed networks with variable delays

We propose an approach to design a distributed rate-based traffic controller to flow-regulate the best-effort service (e.g., ABR) traffic and guaranteed service traffic through a high-speed switch. The controller is distributed among the source nodes and has a very simple structure. Its local controller at each source node is open-loop stable and only requires the knowledge of the queue length at the bottleneck switch. We show that the proposed controller is fair and can stabilize the network with long variable delays. This controller does not have oscillation and can achieve high utilization