A DiffServ enhanced admission control scheme

We propose a scalable reservation protocol and admission control algorithm, DEAC, that combines features of both endpoint admission control and DiffServ architectures. We are able to make hard guarantees to individual flows without per-flow management in the network core. By allowing flows to probe the network for available bandwidth and routers to control the amount of simultaneous probe traffic, this scheme addresses the problems that limit the effectiveness of current endpoint admission control schemes. We describe the overall admission control process and our implementation. We give a detailed analysis of the parameters that control the admission control algorithm and present simulation results that verify the analysis