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Pre-Congestion Notification Problem Statement
draft-chan-pcn-problem-statement-01

Document Type Expired Internet-Draft (individual in tsv area)
Expired & archived
Author Kwok Ho Chan
Last updated 2015-10-14 (Latest revision 2006-10-25)
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Formats
Stream WG state (None)
Document shepherd (None)
IESG IESG state Expired (IESG: Dead)
Action Holders
(None)
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD Lars Eggert
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

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 pre-emption mechanism is necessary in the times of heavy congestion (e.g. caused by route changes due to link or node failure). This document provides a problem statement on the addition of flow admission control and flow pre-emption functionality to a DiffServ network, in particular for the support of real time services such as voice and video.

Authors

Kwok Ho Chan

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)