Thu Mar 25 11:59:21 PST 2004
The control traffic should be limited to a small and known fraction
of the session bandwidth: small so that the primary function of the
transport protocol to carry data is not impaired; known so that the
control traffic can be included in the bandwidth specification given
to a resource reservation protocol, and so that each participant can
independently calculate its share. It is suggested that the fraction
of the session bandwidth allocated to RTCP be fixed at 5%. While the
value of this and other constants in the interval calculation is not
critical, all participants in the session must use the same values so
the same interval will be calculated. Therefore, these constants
should be fixed for a particular profile.
My interpretation of "all participants in the session must use the same
values" is that RTCP will scale "within a session". But why 5%? Why not 10?
or 15? or 1?
This question may not be as critical for RTCP as it is for control traffic
which needs extra processing by routers.
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