Duplicating RTP Streams (RFC7198)
Original Publication Date: 2014-Apr-01
Included in the Prior Art Database: 2014-Apr-26
Internet Society Requests For Comment (RFCs)
A. Begen: AUTHOR [+1]
The Real-time Transport Protocol (RTP) [RFC3550] is widely used today for delivering IPTV traffic and other real-time multimedia sessions. Many of these applications support very large numbers of receivers and rely on intra-domain UDP/IP multicast for efficient distribution of traffic within the network.
Internet Engineering Task Force (IETF) A. Begen Request for Comments: 7198 Cisco Category: Standards Track C. Perkins ISSN: 2070-1721 University of Glasgow April 2014
Duplicating RTP Streams
Packet loss is undesirable for real-time multimedia sessions but can occur due to a variety of reasons including unplanned network outages. In unicast transmissions, recovering from such an outage can be difficult depending on the outage duration, due to the potentially large number of missing packets. In multicast transmissions, recovery is even more challenging as many receivers could be impacted by the outage. For this challenge, one solution that does not incur unbounded delay is to duplicate the packets and send them in separate redundant streams, provided that the underlying network satisfies certain requirements. This document explains how Real-time Transport Protocol (RTP) streams can be duplicated without breaking RTP or RTP Control Protocol (RTCP) rules.
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/rfc7198.
Begen & Perkins Standards Track [Page 1]
RFC 7198 RTP Duplication April 2014
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