[MLB-WIRELESS] good article

Drew drish at bigpond.net.au
Wed Oct 3 12:30:19 EST 2001


> On Tue, Oct 02, 2001 at 07:29:06PM +0100, vortex wrote:
> >
> > you really do not want 70 ppl on one BSS or IBSS PoP (access point or
host)
>
> They are running 12 APs.
>
> > IBSS will give massive 'hidden node' issues.
>
> What are these? What do people know about the bad points with iBSS?

the hidden node problem is in Ad-hoc mode, where A can see B and A can see
C, but B and C can't see each other. It becomes a problem of packet timing
and collisions. According to the IEEE, 802.11 has something to handle this,
but can only handle up to about 10% of nodes being hidden during heavy
usage, more than that and performance will start to suffer.

> How many clients can connect to an AP reasonably?
> Assuming a lot of users will be always connected but inactive most
> of the time, will this mean more connections can be supported?

some AP's have user limits, but otherwise, as many as the bandwidth can
handle

the problem with using AP's for this is that AP's can't connect to other
AP's (unless they're bridges, but that's a whole new mode all together)

d


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