Providing proportional differentiated services using PLQ

The focus of this paper is to provide a scheme that a router should treat each packet differently according to its class. We propose a novel scheme that can provide both delay and loss proportional differentiated services. The scheme employs a probabilistic longest queue first (PLQ) mechanism, which reacts effectively to the queue-length fluctuation of each class. The proposed scheme is proven to achieve differentiated services after detailed evaluations. Furthermore, its implementation cost is much less than traditional schemes, such as WTP and PLR