Explicit Congestion Notification (ECN) for RTP over UDP (RFC6679)
Original Publication Date: 2012-Aug-01
Included in the Prior Art Database: 2012-Aug-03
Internet Society Requests For Comment (RFCs)
M. Westerlund: AUTHOR [+5]
This memo outlines how Explicit Congestion Notification (ECN) [RFC3168] can be used for Real-time Transport Protocol (RTP) [RFC3550] flows running over UDP/IP that use the RTP Control Protocol (RTCP) as a feedback mechanism. The solution consists of feedback of ECN congestion experienced markings to the sender using RTCP, verification of ECN functionality end-to-end, and procedures for how to initiate ECN usage. Since the initiation process has some dependencies on the signalling mechanism used to establish the RTP session, a specification for signalling mechanisms using the Session Description Protocol (SDP) [RFC4566] is included.
Internet Engineering Task Force (IETF) M. Westerlund Request for Comments: 6679 I. Johansson Category: Standards Track Ericsson ISSN: 2070-1721 C. Perkins University of Glasgow P. O'Hanlon University of Oxford K. Carlberg G11 August 2012
Explicit Congestion Notification (ECN) for RTP over UDP
This memo specifies how Explicit Congestion Notification (ECN) can be used with the Real-time Transport Protocol (RTP) running over UDP, using the RTP Control Protocol (RTCP) as a feedback mechanism. It defines a new RTCP Extended Report (XR) block for periodic ECN feedback, a new RTCP transport feedback message for timely reporting of congestion events, and a Session Traversal Utilities for NAT (STUN) extension used in the optional initialisation method using Interactive Connectivity Establishment (ICE). Signalling and procedures for negotiation of capabilities and initialisation methods are also defined.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6679.
al. Standards Track [Page 1]
RFC 6679 ECN for RTP over UDP/IP August 2012
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