If you want to simulate VoIP traffic you could also use the Paretto generator, I think it will simulate bursty VoIP more precisely than Exponential.
Douglas Nascimento - UFRGS Quoting Pedro Fortuna <[EMAIL PROTECTED]>: > > 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 > > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
