Performance Evaluation of Pre-Congestion Notification

Pre-Congestion Notification (PCN) has been proposed at IETF as a framework for scalable measurement-based admission control (MBAC) for a DiffServ-capable network domain. PCN encompasses two functions: admission control of new flows and termination of admitted flows when the available capacity is unexpectedly reduced after a network failure. While there has been extensive research on MBAC, our goal is to understand practical limitations of the specific admission algorithms proposed for PCN and to understand the properties of the termination algorithms of which little is known from prior research.