Resource allocation rules for providing performance guarantees to traffic aggregates in a DiffServ environment

摘要

The background of this paper is the Differentiated Services (DiffServ) approach to introduce quality of service in Internet. We consider connection admission control (CAC) protocols over the DiffServ layer for providing performance guarantees. The challenging aspect is that flows' statistics may change inside networks. Our analysis, based on Network Calculus, shows that if flows are shaped at edge routers only, it is possible to provide performance guarantees to traffic aggregates in terms of delay and losses. We have applied these results to two CAC techniques. The former guarantees hard performance, while the latter can capture the traffic fluctuations and allows overbooking during periods of source inactivity.