RE: [ns] RE: Bandwidth in 802.11 simulation

[Lloyd Wood <l.wood@eim.surrey.ac.uk>]

On Thu, 5 Apr 2001, Antonio Grilo wrote:

> I've not been using NS to simulate 802.11 as I have my own simulator.
> Nevertheless, I believe that the "bandwidth" parameter corresponds to the
> physical crude bit-rate, not being affected by other parameters.

This is, of course, contrary to conventional computer scientist usage
of bandwidth, which can be taken to mean link capacity,
flow throughput, or even goodput...

> So, while I've not checked the code yet, I would expect you to find the
> "bandwidth" parameter used in the calculation of frame transmission times
> (at least it was like this that I have implemented my own simulator), and
> only for the physical payload (the physical preamble and header are always
> transmitted at 1 Mbps).

Don't presume preambles and headers are simulated until you've seen
the code. Variable names are an indication, nothing more.

L.

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>