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Duplication Grouping Semantics in the Session Description Protocol
draft-begen-mmusic-redundancy-grouping-03

Document type: Replaced Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2012-10-15 (latest revision 2012-03-11)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

Stream State:No stream defined
Document shepherd: No shepherd assigned

IESG State: Replaced by draft-ietf-mmusic-duplication-grouping
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:
http://www.ietf.org/archive/id/draft-begen-mmusic-redundancy-grouping-03.txt

Abstract

Packet loss is undesirable for real-time multimedia sessions, but 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 [RFC5888]. SSRC-level (Synchronization Source) grouping semantics are also defined in this document for RTP streams using SSRC multiplexing.

Authors

Ali Begen <abegen@cisco.com>
Yiqun Cai <ycai@cisco.com>
Heidi Ou <hou@cisco.com>

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)