Showing papers by "Yong Cui published in 2004"

Multi-constrained End-to-End Admission Control in Core-Stateless Networks

Abstract: As one of the most important mechanisms in next-generation networks with QoS support, admission control that allots network resources should be scalable and efficient. Keeping the connectionless nature of the Internet without resource reservation, we propose a novel multi-constrained end-to-end admission control mechanism to provide statistical QoS guarantees. We divide the Internet into the core and edge networks hierarchically. The core only maintains its own QoS state and uses connectionless hop-by-hop QoS routing. The ingress router performs the admission control by coordinating with all of the routers along the end-to-end path and maintains the per-flow state. The four trips of a request in the admission control process reduce the impact of stale routing information. Simulations show the effectiveness of the proposed mechanism without resource reservation.

Simple quality-of-service path first protocol and modeling analysis

Abstract: QoS (quality-of-service) control is one of the most important mechanisms in the next-generation Internet, where QoS routing (QoSR) is a promising solution. We propose a multi-constrained intradomain QoS routing protocol SQOSPF. The advantages of this protocol include easy implementation, multi-constrained QoS support, high-speed convergence and multiple QoSR algorithms support. Stochastic Petri net is employed to model SQOSPF and analyze impacts of update threshold and routing holding time upon the load of networks and routers. Extensive simulations show that choosing appropriate update threshold and routing holding time can excessively reduce the extra load and keep routing performance at the same time.