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RFC 8083
Title: Multimedia Congestion Control: Circuit Breakers
for Unicast RTP Sessions
Author: C. Perkins, V. Singh
Status: Standards Track
Stream: IETF
Date: March 2017
Mailbox: csp@csperkins.org,
varun@callstats.io
Pages: 25
Characters: 67197
Updates: RFC 3550
I-D Tag: draft-ietf-avtcore-rtp-circuit-breakers-18.txt
URL: https://www.rfc-editor.org/info/rfc8083
DOI: 10.17487/RFC8083
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 these applications, then network congestion can
lead to uncontrolled packet loss and a resulting deterioration of the
user's multimedia experience. The congestion control algorithm acts
as a safety measure by stopping RTP flows from using excessive
resources and protecting the network from overload. At the time of
this writing, however, while there are several proprietary solutions,
there is no standard algorithm for congestion control of interactive
RTP flows.
This document does not propose a congestion control algorithm. It
instead defines a minimal set of RTP circuit breakers: conditions
under which an RTP sender needs to stop transmitting media data to
protect the network from excessive congestion. It is expected that,
in the absence of long-lived excessive congestion, RTP applications
running on best-effort IP networks will be able to operate without
triggering these circuit breakers. To avoid triggering the RTP
circuit breaker, any Standards Track congestion control algorithms
defined for RTP will need to operate within the envelope set by these
RTP circuit breaker algorithms.
This document is a product of the Audio/Video Transport Core Maintenance Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
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