Series Applicability of PCN-Based Admission Control

Pre-congestion notification (PCN) marks packets when the PCN traffic rate exceeds an admissible link rate and this marking information is used as feedback from the network to take admission decisions for new flows. This idea is currently under standardization in the IETF. Different marking algorithms are discussed and various admission control (AC) algorithms are proposed that decide based on the packet markings whether further flows should be accepted or blocked. In this paper, we investigate the applicability of PCN-based AC under challenging conditions and show the limitations of different marking and AC algorithms.

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