Applicability Statement for the Use of Pre-Congestion Notification in a Resource-Controlled Network

Document Type Expired Internet-Draft (individual)
Authors Tina Tsou  , Fortune Huang  , Tom Taylor 
Last updated 2008-11-03 (latest revision 2008-02-16)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document is written to help coordinate work on pre-congestion notification (PCN) between the IETF PCN Working Group and the ITU-T. It maps the use of PCN into the ITU-T transport control architecture. It examines three scenarios, showing in each, where new requirements are placed on the ITU-T architecture. In each case, the ITU-T functional entity known as the Transport Resource Control Functional Entity (TRC-FE) is seen as the logical destination for PCN congestion reports and PCN flow termination reports, which it uses to keep track of network status. As logical entities, instances of the TRC-FE can be present in the ingress nodes, in one or more centralized devices, or in both. These alternatives define the scenarios examined.


Tina Tsou (
Fortune Huang (
Tom Taylor (

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