The Design of Fine-grained Network QoS Controller and Performance Research with Network Calculus

In this paper a network QoS controller is designed. We use the controller to quantification ally control QoS under the random network traffic. The controller is built by min-plus algebra based on network calculus. The controller includes two parts, the lossless fractal regulator and the finite variable storage shaper (FVSS). We can get the arrival curve with the lossless fractal regulator. Then the FVSS control network traffic to realize the fine-gained QoS controller. At last, we analyze the performance of the network QoS controller. Research results show that the relationship between packet losses, packet delays and the buffer storage. We clearly observe the change of the packet loss and the packet delay with the storage of buffer. The results can be applied to evaluate the congestion and flow control strategies, as well as these are references to design network control device parameters.