Multimedia congestion control: circuit breakers for unicast RTP sessions

Perkins, C. and Singh, V. (2017) Multimedia congestion control: circuit breakers for unicast RTP sessions. Internet RFC(8083), (doi:10.17487/RFC8083)

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Abstract

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.

Item Type:Articles (Other)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Perkins, Dr Colin
Authors: Perkins, C., and Singh, V.
Subjects:Q Science > QA Mathematics > QA76 Computer software
College/School:College of Science and Engineering > School of Computing Science
Journal Name:Internet RFC
Publisher:Internet Society
ISSN:2070-1721
ISSN (Online):2070-1721
Published Online:01 March 2017
Copyright Holders:Copyright © 2017 IETF Trust and the Authors
First Published:First published in Internet RFC: 8083
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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