%% You should probably cite draft-ietf-mmusic-duplication-grouping instead of this I-D. @techreport{begen-mmusic-redundancy-grouping-03, number = {draft-begen-mmusic-redundancy-grouping-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-begen-mmusic-redundancy-grouping/03/}, author = {Ali C. Begen and Yiqun Cai and Heidi Ou}, title = {{Duplication Grouping Semantics in the Session Description Protocol}}, pagetotal = 10, year = 2012, month = mar, day = 11, 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.}, }