DRES: network resource management using deferred reservations

In this paper, we consider the problem of resource reservation for networks. Current approaches for resource reservation in Integrated Service Networks adopt an all-or-nothing approach, where partially acquired resources must be released if resources are not available at all routers on the chosen path. Furthermore, under high load, endsystems must retry requests repeatedly leading to inefficient allocation and increased traffic. We propose a new approach called Deferred REServation (DRES) that substantially improves performance (reduces the overall flow rejection probability and increases link utilization) over the all-or-nothing reservation approach. Flow admissibility is increased by deferring requests at routers for a limited period of time until resources are available. Analytical and simulation results confirm the performance benefits of our approach.