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Re: [ns] Drop-tail queue principle?
The Link bandwidth and the packet size affect the txtime (see
delay.cc). The LinkDelay object computes the time taken for the packet
transmission and schedules an event at txtime offset. The event handler
(queuehandler.. queue.cc) calls q.resume... which transmits the next packet.
Hope it helps.
Regards,
Sudhin.
On Fri, 16 Mar 2001, Bai David wrote:
> Then how does NS simulate the different bandwidth?
>
> David
> --- Bilgin Metin <[email protected]> wrote:
> > the queue length affects packet delay and number of
> > dropped packets
> > directly. It will not change bandwidth.
> > Bilgin
> > ----- Original Message -----
> > From: "Bai David" <[email protected]>
> > To: <[email protected]>
> > Sent: Thursday, March 15, 2001 2:23 PM
> > Subject: Re: [ns] Drop-tail queue principle?
> >
> >
> > > Dear Yan,
> > > Thanks for reply!
> > > It seems that the queue length is totally
> > indepent
> > > on the bandwidth. But I wonder how NS can simulate
> > the
> > > difference of link bandwidth. What's more, NS
> > > documents thow that there is a queue assocaited
> > with
> > > the link object. What's the purpose of that queue?
> > >
> > > Regards
> > > David
> > > --- Yan Hu <[email protected]_21cn>,
> > > [email protected].
> > wrote:
> > > > Dear David
> > > > you are wrong. The qlim_ is the drop tail
> > > > queue max length or buffer of router max
> > physical
> > > > capacity which is independent of the bandwith of
> > > > outgoing or ingoing links.
> > > >
> > > >
> > > > Yours Sincerely
> > > > Yan Hu
> > > > [email protected] [email protected]
> > [email protected]
> > > >
> > >
> > >
> > > __________________________________________________
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> > >
> >
>
>
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****************** Sudhindra Suresh Bengeri ********************
Graduate Research Assistant | Home: |
to Dr. George N. Rouskas | 2110, Gorman St., |
EGRC 454H, Computer Sci. dept.| Raleigh, NC - 27606 |
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