A New Internet-Draft is available from the on-line Internet-Drafts
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Title : Pre-Congestion Notification Encoding Comparison
Author(s) : K. Chan, G. Karagiannis
Filename : draft-chan-pcn-encoding-comparison-00.txt
Pages : 36
Date : 2007-7-5
DiffServ mechanisms have been developed to support Quality of Service
(QoS). However, the level of assurance that can be provided with
DiffServ without substantial over-provisioning is limited. Pre-
Congestion Notification (PCN) investigates the use of per-flow
admission control to provide the required service guarantees for the
admitted traffic. While admission control will protect the QoS under
normal operating conditions, an additional flow termination mechanism is necessary in the times of heavy congestion (e.g. caused by route
changes due to link or node failure).
Encoding and their transport are required to carry the congestion and
pre-congestion information from the congestion and pre-congestion
points to the decision points. This document provides a survey of
several encoding methods, using comparisons amongst them as a way to
explain their strengths and weaknesses.
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