[ns] Help in simulating video
elreis at dei.uc.pt
Wed Sep 19 12:34:21 PDT 2007
I want to generate video traffic with diverse characteristics (MPEG-4, H.263
and H.261) and quality over SCTP in NS-2.
My questions are:
(1) Is Exponential Traffic Generator is adequate to simulate it (MPEG-4,
H.263 and H.261)?
(2) What are the most adequate values for the different parameters, i.e.,:
packetSize_ (packet size)
busrt_time (average "on" time in secs)
idle_time (average "off" time in secs)
rate_ (transmission rate during "on" periods
(3) How can I indicate the peak rate.
Please, I need some help.
1. Video - EXP2 also has exponential "on" and "off" times, but with the
average of 100 ms and 900 ms, respectively. The peak rate is increased to
310 Kbps while keeping the average rate the same as EXP1, leading to a
burstier source. EXP2 generates the burstiest traffic among the four models
that we consider and can be used to describe other traffic, such as video
streams or multimedia conferencing applications that have higher statistical
variability than VoIP.
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