End-to-end guaranteed QoS with statistical multiplexing for ATM networks

We investigate a method for supporting diverse quality-of-service requirements in broadband networks based on ATM technology. The method uses deterministic bandwidth reservation at the Virtual Path (VP) level and statistical multiplexing within each VP. A deterministic server such as a Weighted Round Robin (WRR) server is used to enforce bandwidth reservations among the VPs. We develop a connection admission algorithm which accounts for end-to-end delay and loss guarantees for Virtual Circuits which traverse a single VP. We show that under certain conditions the amount of network bandwidth required by a VP is minimized by incurring all the allowable loss at the rst link of a VP. Achievable utilization is demonstrated using simulation. The e ect of the parameters of the WRR server (i.e., the vacation time) on the cell loss probability is also studied using simulation. Keyword Codes: C.2.1, C.2.2, C.4