[B.A.T.M.A.N.] Wimax-Stuff and Ideas

Simon Wunderlich simon.wunderlich at s2003.tu-chemnitz.de
Fri Feb 13 14:23:09 UTC 2009


Hey Bastian,

On Fri, Feb 13, 2009 at 02:08:40PM +0100, Bastian Bittorf wrote:
> * Simon Wunderlich <simon.wunderlich at s2003.tu-chemnitz.de> [13.02.2009 01:30]:
> 
> [sorry for mixing up threads]
> 
> > WiFi has some kind of range limit due to the acknowledgement timeout,
> > but you can easily overcome this by increasing the timeout (at least the 
> > madwifi driver allowed to change this timeout). Another
> > limit is of course the allowed transmit power, or EIRP. The limit is
> 
> Thats not true for special tasks like disaster management.
> It's no problem (and allowed) to work with 40.000 mW in such a situation.
> Ask somebody from the german THW for details.

Thanks for pointnig that out, i did not know that. :)
So you can get an exception from the RegTP for special purposes like
desaster management?

> 
> Normally you have some cars with built-in radio's, that are placed on
> e.g. hills to build up the backbone and do an "shortshot" down to
> the base of the hill to the workers (with another freq)
> 
> Wimax is the worse idea i have ever heard of for such a situation.
> Just look at the frequencies, and it _must_ be clear that it was not
> build for long range. You have to lower the frequency to get a higher
> range...so take WiFi or use 900 MHz GSM...

best regards
	Simon
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