RFC 7104

Duplication Grouping Semantics in the Session Description Protocol, January 2014

Canonical URL:
https://www.rfc-editor.org/rfc/rfc7104.txt
File formats:
Plain TextPDF
Status:
PROPOSED STANDARD
Authors:
A. Begen
Y. Cai
H. Ou
Stream:
IETF
Source:
mmusic (rai)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC7104

Discuss this RFC: Send questions or comments to mmusic@ietf.org

Other actions: Find Errata (if any)  |  Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

Packet loss is undesirable for real-time multimedia sessions, but it can occur due to congestion or other unplanned network outages. This is especially true for IP multicast networks, where packet loss patterns can vary greatly between receivers. One technique that can be used to recover from packet loss without incurring unbounded delay for all the receivers is to duplicate the packets and send them in separate redundant streams. This document defines the semantics for grouping redundant streams in the Session Description Protocol (SDP). The semantics defined in this document are to be used with the SDP Grouping Framework. Grouping semantics at the Synchronization Source (SSRC) level are also defined in this document for RTP streams using SSRC multiplexing.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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