A distributed DiffServ supporting scheduling scheme

The convergence of diverse traffic requires modem networks to provide QoS (Quality of Service) solutions to time-critical applications. Due to its simplicity and scalability, the differentiated service (DiffServ) solution is expected to be widely deployed across the Internet. In this paper, we propose a distributed DiffServ supporting scheduling (DDSS) scheme based on buffered crossbar switches. The schedulers of the proposed DDSS scheme can be implemented on each input and each output independently and in parallel, hence are more practical and scalable. Simulation results show that DDSS scheme can provide minimum bandwidth guarantees for EF and AF traffic and fair bandwidth allocation for BE traffic. DDSS scheme also exhibits good delay performance for EF traffic and AF traffic through simulations.EI