Technical Report Number
This paper studies the performance of deferred resource reservation in data networks. Conventional resource reservation protocols, such as PNNI and RSVP adopt an all-or-nothing approach, where partially acquired resources must be released if resources are not available at all links on the chosen path. During periods of high network load, this leads users to retry requests repeatedly, adding control traffic at exactly the time when the network's capacity to process that control traffic is exhausted. Deferred REServation (DRES) can significantly improve performance by reducing the overall call rejection probability, allowing more traffic to be carried, using the same resources. Call admissibility is increased by deferring requests at routers for a limited period of time until resources become available. The paper includes an analysis of the performance of a DRES multiplexor, for Poisson and bursty reservation arrival processes, and simulation results for substantial network configurations, using several different QoS methods.
Norden, Samphel and Turner, Jonathan, "Performance of Deferred Reservations in Data Networks" Report Number: WUCS-01-25 (2001). All Computer Science and Engineering Research.