I assume that there's a correlation, because two people do not talk exactly at the same time. They usually talk and then listen. Thus, one flow periods of idleness usually correlate to the other flow's periods of burstiness. Maybe the best way to model that is with a single on/off source, but I don't know the details.
I followed a simpler approach, where I setup a flow in each direction, with the same burst and idle mean values and also with the same data rates. With this kind of strategy, you'll have very simetric data passing in the pipes. This means that in such kind of conversations, both in the short and in the long run, people will talk aproximately the same time... which sounds more like a political debate than a regular phone conversation :-) On 8/4/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Is it necessary to consider the correlation between UL and DL voice traffic? > > Or we simply assume UL and DL are independent traffic stream both generated by > Application/Traffic/Exponential? > > I am simulating VoIP in 802.11 networks, where UL and DL compete for the same > channel. > > Thanks > > > Quoting Pedro Fortuna <[EMAIL PROTECTED]>: > > > > > Hello, > > > > I've been using Application/Traffic/Exponential as a traffic generator > > on top of Agent/UDP. It's not perfect, because, for instance, I > > specified 8Kbit data rate, but often I only see 5 or 6Kbit/s passing > > through... but maybe i'm doing something wrong.... > > > > Pedro Fortuna > > INESC Porto > > > > On 8/4/06, Matthew Jakeman <[EMAIL PROTECTED]> wrote: > > > > > > VoIP is basically just UDP packets encapsulating RTP packets with the > > > voice > > > data inside, all you should need to do to simulate a VoIP stream is set > > > the > > > correct packet size and frequency that the packets are sent out and that > > > would simulate a stream, all of which can be done easily inside your tcl > > > script! > > > > > > Matt > > > > > > On Thursday 03 August 2006 16:41, lekkie omotayo wrote: > > > > Hi, > > > > > > > > Does anybody know an existing VoIP simulated Application existing on > > > > NS2? > > > > > > > > I am ready to develop it myself, however, most of my questions has no > > > > been answered. > > > > > > > > > > > > -- > > Cumprimentos, > > Pedro Fortuna > > > > > > > > -- Cumprimentos, Pedro Fortuna
