Hi ,
I didnot know about these three transmit power levels. Thanks Iqbal for
that.
I wanted to have Interference Range(Carrier Sense Range) to be twice the
Communication Range. So I achieved by calculating CSThresh_ value by
following formula
Pt * Gt * Gr * (hr * hr * ht * ht) / {(Required interference range) ^ 4}
--Ashish
On 7/13/06, Q.R.Iqbal <[EMAIL PROTECTED]> wrote:
>
> Hi there
>
> I think there is no other cleaner or easiar way to do that unless you
> modify the code.
>
> One thing you have to be aware of is that by modifying the transmission
> range, you are only changing the receiver threshold, A distance from
> which a receiver can receive.
>
> Again there are three different transmit power levels that are given for
> the wavelan Modem
>
> 40m 8.5872e-4
> 100m 7.214e-3
> 250m 02818
>
> Maybe you need to use one of these parameters, the closest to your
> required transmission range and then calculate the RXthreshold values, to
> get a better result.
> Also you need to be aware of CSthreshold,. If you are limiting the node's
> transmission range to 40m or 100m or any value, the CSthreshold value,
> will still be very large, about 550m by default, you might also want to
> tweak that parameter to see if this improves your results
>
> I hope this helps
>
> > Hi,
> >
> > Can you tell me a clean way to change transmission and interference
> ranges
> > in ns-2?
> > I tried the threshold program given ~ns/indep-utils/propagation/ but
> that
> > somehow is not giving correct values.
> >
> > Regards,
> > --
> > Ashish Sangwan
> > B.Tech, Computer Science & Engineering
> > IIT Delhi
> >
> > --
> > I do know everything, just not all at once. It's a virtual memory
> problem.
> >
>
>
> Kind regards
>
> Qasim Raza Iqbal
> PhD Candidate,
> ACNRG Lab N504, Office N505
> Adaptive Communications Networks Research Group,
> School of Engineering And Applied Science
> Aston University
> Birmingham B4 7ET
> United Kingdom
> http://www.ee.aston.ac.uk/research/acrg/index.html
>
>
>
