Actually I just got a note from the engineer who was quoted, and my
guess was correct. What he was trying to say was than people seem to be
pumping more data with the higher bandwidth available to them. So data
rate to him was how much data. He did also say he tried to explain to
the reporter that he was an RF guy, not a wi-fi guy.
Sure lower data rates will put less RF into the air if all things are
equal, but not significantly less for most modulations. I'll still
stand by my on air/off air time (combined with power and antenna gain)
as the best measure of total energy that interferes with other signals.
Now if you want to call me out on how lower data rates may have less
chance of a re-transmission I'll break out some fancy math. Instead you
may want to take a peek at the paper Jim Thompson mentioned earlier in
this thread. Sure it is an 80+ page thesis, but the guy who wrote it is
smarter than me, writes better too.
http://citeseer.nj.nec.com/shepard95decentralized.html
Cliff
On Tuesday, May 21, 2002, at 12:39 , Glenn Fleishman wrote:
> On 5/21/02 9:53 AM, Cliff Skolnick <[EMAIL PROTECTED]> wrote:
>>
>> The last line is funny. I always thought that transmitting a packet at
>> 11mpbs would use less airtime than using 2mbps. Silly me, guess this
>> guy
>> knows some special math. I hope he was just misquoted since it takes
>> away
>> much of his credibility.
>
> Don't let me defend fuzzy thinking, but I believe that the slower
> frequencies are not just more resistant to interference, but also use
> FHSS.
> So, ostensibly, running at 2 Mbps might produce less interferring
> signals
> and be less interferred with?
>
> Airtime t'ain't the issue, I hope.
> --
> ----------------------------------------------------------------------
> Glenn Fleishman, Unsolicited Pundit: read my work at http://glennf.com
> freelance journalist for Wired, New York Times, Seattle Weekly, et al
> Practical Mac columnist, Seattle Times http://seattletimes.com/ptech/
> interested in wireless 802.11b networking? http://80211b.weblogger.com
> I live in Seattle, WA. I write about technology http://blog.glennf.com
>
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