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This Internet-Draft is no longer active.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