Class assigning management for stream flows considering characteristics of nonstream flow classes

We term multimedia streaming application traffic "stream flows", and the other usual application traffic "nonstream flows". There are many problems where both flows are aggregated on a shared link, because different TCP and UDP behaviors cause negative interactions. One way to solve these problems is to isolate stream and nonstream flows to different classes. However, because it is then difficult to determine the bandwidth allocation for each class, it is hard to implement on large scale networks. We therefore propose a dynamic class assignment method that maintains the QoS and that has a higher scalability than dynamic bandwidth allocation schemes. It is workable on Diffserv AF PHB, and is outlined as follow. We classify nonstream flows into four classes and dynamically assign stream flows to the classes, taking the conditions and characteristics of the classes into consideration. We propose an algorithm for our dynamic class assignment method and provide some simulation results where it could provide constant qualities with stream and nonstream flows, adapting to changing traffic.