WSAP: provide loss rate differentiation with active queue management

How to provide service differentiation on the Internet is a hot research topic. One proposal is to provide loss rate differentiation by assigning levels of drop precedence to IP packets. In this paper, we propose a new AQM mechanism, weighted SAP (WSAP) to achieve this goal. WSAP is based on a new AQM algorithm simple adaptive proportional (SAP). WSAP can approximate proportional loss rate differentiation, while keeping high link utilization and short queuing delay. Compared with WRED and RIO, WSAP is easier to configure and can provide better performance. Furthermore, an architecture for differentiated service is proposed in this paper. In the design of this architecture, we pay more attention to the characteristics of network traffic in the Internet and try to preserve the Internet´s original design principles.