Re: [ns]RealAudio over Wireless links

[kunchanl <kunchanl@pollux.usc.edu>]

Ok, I thought you were just replacing "FTP" with "RealAudio"
Have you tried your code with other types of traffic generators like
EXP, Pareto...etc? 

Kun-chan Lan

On Mon, 16 Apr 2001, Xiaobing Fan wrote:

> 
> 
> That makes sense. But I cann't see any differece in the use of FTP and
> RealAudio(except that in RealAudio you need to define packetSize,etc)
> 
> Here's what I did: I replaced this piece of code in simple-wireless.tcl:
> 
> set tcp [new Agent/TCP]
> $tcp set class_ 2
> set sink [new Agent/TCPSink]
> $ns_ attach-agent $node_(0) $tcp
> $ns_ attach-agent $node_(1) $sink
> $ns_ connect $tcp $sink
> set ftp [new Application/FTP]
> $ftp attach-agent $tcp
> $ns_ at 1.0 "$ftp start"
> 
> with:
> 
> set udp [new Agent/UDP]
> set null [new Agent/Null]
> $ns_ attach-agent $node_(0) $udp
> $ns_ attach-agent $node_(1) $null
> $ns_ connect $udp $null
> 
> set realaudio [new Application/Traffic/RealAudio]
> $realaudio set packetSize_ 245
> $realaudio set burst_time_ 0.05ms
> $realaudio set idle_time_ 1800ms
> $realaudio set rate_ 128kb
> 
> $realaudio attach-agent $udp
> $ns_ at 1.0 "$realaudio start"
> 
> And I keep getting "segmentation fault". Please let me know where the bug
> is if someone figured it out. Thanks a lot!
> 
> Xiaobing
> 
> 
> On Mon, 16 Apr 2001, kunchanl wrote:
> 
> > Ftp is a application while RealAudio is a traffic generator,
> > so you cannot just substitue one with the other. Please read
> > ns manual chapter 33 for details.
> >
> > Kun-chan Lan
> >
> > On Mon, 16 Apr 2001, Xiaobing Fan wrote:
> >
> > >
> > > Dear all,
> > >
> > > Is RealAudio traffic transmision over wireless links supported by current
> > > ns version? I keep getting "segmentation fault" when I change the ftp
> > > traffic to RealAudio in simple-wireless.tcl. Could someone please tell me
> > > why?
> > >
> > > Thanks a lot!
> > >
> > > Xiaobing
> > >
> >
>