RTP Congestion Control: Circuit Breakers for Unicast Sessions

Document Type Replaced Internet-Draft (candidate for avtcore WG)
Authors Colin Perkins  , Varun Singh 
Last updated 2012-10-12 (latest revision 2012-07-16)
Replaced by RFC 8083
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Call For Adoption By WG Issued
Document shepherd Magnus Westerlund
IESG IESG state Replaced by draft-ietf-avtcore-rtp-circuit-breakers
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Real-time Transport Protocol (RTP) is widely used in telephony, video conferencing, and telepresence applications. Such applications are often run on best-effort UDP/IP networks. If congestion control is not implemented in the applications, then network congestion will deteriorate the user's multimedia experience. This document does not propose a congestion control algorithm; rather, it defines a minimal set of "circuit-breakers". Circuit-breakers are conditions under which an RTP flow is expected to stop transmiting media to protect the network from excessive congestion. It is expected that all RTP applications running on best-effort networks will be able to run without triggering these circuit breakers in normal operation. Any future RTP congestion control specification is expected to operate within the envelope defined by these circuit breakers.


Colin Perkins (csp@csperkins.org)
Varun Singh (varun@comnet.tkk.fi)

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