Re: Re: [ns] queue monitor

["Sagar A G" <hisag@rediffmail.com>]

thanks,

sorry if my question was confusing. Actually i'm trying to find out the available bandwidth of a wireless link at a particular instance of time dynamically(not a post simulation) and provide this information to the routing agent.
Can u help me??
 

On Fri, 26 Oct 2001 Jonathan Hicks wrote :
> Sagar,
> I don't know if this is what you wanted, but here is 
> code to find what 
> percentage of a link is being used at any time (uses 
> queuemonitor).
> Jonathan Hicks
> 
> set LFile [open linkutil.out w]
> #Monitor the queue on link from n2 to n3
> set qmon [$ns monitor-queue $Node2 $Node3 $LFile]
> set linkmon [$ns link $Node2 $Node3]
> set interval 0.5
> proc calc {} {
>     global ns qmon LFile linkmon interval
>     set now [$ns now]
>     #amount of bytes leaving the queue, entering the 
> link
>     set rxbytes [$qmon set bdepartures_]
>     #bandwidth is in bits/second
>     set linkbw [[$linkmon link] set bandwidth_]
>     set utilpercentage [expr 
> $rxbytes*8*100/$interval/$linkbw]
>     puts $LFile "$utilpercentage"
>     $qmon set bdepartures_ 0
>     # templine to print output to screen. Remove it if 
> your code works
>     puts $LFile "time = $now, interval = $interval, 
> received_bytes = 
> $rxbytes, linkbw = $linkbw, linkutilization = 
> $utilpercentage"
> 
>     $ns at [expr $now+$interval] "calc"
> }
> 
> 
> 
> >From: "Sagar A G" <hisag@rediffmail.com>
> >Reply-To: "Sagar A G" <hisag@rediffmail.com>
> >To: ns-users@ISI.EDU
> >Subject: [ns] queue monitor
> >Date: 26 Oct 2001 10:38:23 -0000
> >
> >
> >hi..
> >can i use lossmonitor or queue monitor to find out 
> bandwidth at any 
> >instatce of time?
> >
> >any pointers?
> >
> >Sagar
> >
> 
> 
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