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SIP Controlled Admission and Preemption

Document Type Expired Internet-Draft (individual in tsv area)
Expired & archived
Author Jozef Babiarz
Last updated 2015-10-14 (Latest revision 2006-10-16)
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Stream WG state (None)
Document shepherd (None)
IESG IESG state Expired (IESG: Dead)
Action Holders
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This Internet-Draft is no longer active.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:


This framework defines a method of providing Explicit Congestion Control to real-time inelastic traffic like voice and video through the use of session admission control and preemption mechanisms. This approach uses the Pre-Congestion Notification Marking (PCN) [1] mechanism. PCN marking is deployed in routers to measure and convey two levels of onset of congestion with the SIP controlled endpoints responding to the marking. This approach is different from what is defined in An edge-to-edge Deployment Model for Pre-Congestion Notification [3], as here the admission and preemption control function resides in the application (either in the endpoint or the application server that controls the endpoint. This framework is focused on using Session Initiated Protocol (SIP) as the application signaling protocol but other application signaling protocols could be extended for this purpose.


Jozef Babiarz

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