Re: [ns] Bandwidth and Delay for a Mobile Node

[scao@grc.nasa.gov]

Hi Mr. Tarik,

1.) Do you know how to check a bandwidth and delay for  mobile node or 
wireless node?

2.) Can we look at a trace file or printout a message to check a bandwidth 
or delay for mobile node?  If so, how?

3.) In ex/wireless.tcl files, I saw a bandwidth and delay to be setup as 
following:
LL set delay_ 25us
LL set bandwidth_ 0 ; not used
LL set off_prune_  0; not used

What do you think about this?

4.) In ns-defaults.tcl, I saw a bandwidth and delay to be setup as following:

# Default values used for wireless simulations
Simulator set AgentTrace_ ON
Simulator set RouterTrace_ OFF
Simulator set MacTrace_   OFF

LL set mindelay_                50us
LL set delay_                   25us
LL set bandwidth_               0       ;# not used
LL set off_prune_               0       ;# not used
LL set off_CtrMcast_            0       ;# not used

5.) Tarik said, "yes. Assuming you are using plain Mac."
Are you sure I can use "Mac set bandwidth_  and Mac set delay" for a mobile 
node?

Thanks,


Son Cao

At 05:01 PM 10/26/2000 -0400, Tarik Alj wrote:
>do something like grep bandwidth_ *.cc and/or *.h. Bandwidth "should" be 
>set at
>Phy level or Mac level, no higher.
>
> >From: scao@grc.nasa.gov
> >X-Sender: shc1909@popserve.grc.nasa.gov
> >Date: Thu, 26 Oct 2000 15:11:39 -0400
> >To: Diepchi T Tran <Diepchi.T.Tran@lerc.nasa.gov>, ns-users@isi.edu
> >Subject: [ns] Bandwidth and Delay for a Mobile Node
> >Cc: scao@grc.nasa.gov
> >Mime-Version: 1.0
> >
> >Hi,
> >
> >Do you know how to setup a bandwidth and delay of mobile node?
> >
> >Which's  one below correct?
> >
>
> >Mac set bandwidth_ 10Mb
>
>yes. Assuming you are using plain Mac.
>
> >Delaylink  set bandwidth_ 10Mb
>
>no.
>
> >LL set bandwidth_ 10Mb
>
>no.
>
> >Node/MobileNode set bandwidth_ 10Mb
>
>I'd say no.
>
> >
> >Can you explain how to use Mac,  Delaylink,  LL,  Node/MobileNode?
> >
> >LL  was used to set up bandwidth and delay on the wireless-mip-test.tcl and
> >ex/wireless.tcl files.  I think that LL is used to set up bandwidth for a
> >wireless node or mobile node.  (EX: LL set bandwidth_ 10Mb, LL set delay_
> >100ms)
>
>I don't use wireless stuff, but I think that would not be correct since LL
>doesn't make use of bandwidth_. Please see ll.cc.
>
> >
> >If I am wrong, please correct me.
> >
> >
> >Son Cao
>
>Tarik