6.1. RTCP at the Sender

In the case of session-multiplexing, Sender Report (SR) packets for the original stream are sent in the original session and SR packets for the retransmission stream are sent in the retransmission session according to the rules of RTP.

In the case of SSRC-multiplexing, SR packets for both original and retransmission streams are sent in the same session according to the rules of RTP. The original and retransmission streams are seen, as far as the RTCP bandwidth calculation is concerned, as independent senders belonging to the same RTP session and are thus equally sharing the RTCP bandwidth assigned to senders.

Note that in both cases, session- and SSRC-multiplexing, BYE packets MUST still be sent for both streams as specified in RTP. In other words, it is not enough to send BYE packets for the original stream only.