Scalability in Large Deployments
In large-scale applications, such as in Internet Protocol Television (IPTV), very long delays (minutes to hours) between RTCP reports may occur, because of the RTCP bandwidth control mechanism required to control congestion (see #Protocol functions). Acceptable frequencies are usually less than one minute. This affords the potential of inappropriate reporting of the relevant statistics by the receiver or cause evaluation by the media sender to be inaccurate relative to the current state of the session. Methods have been introduced to alleviate the problems: RTCP filtering, RTCP biasing and hierarchical aggregation.
Read more about this topic: RTP Control Protocol
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