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AP with 3 Omni Antennas

Posted: Tue Sep 08, 2009 11:16 pm
by chainsawman
Hello

We have an AP overcrowded with customers.
Then came the idea of putting 3 Omni in 2.4GHz, using non-overlapping channels = 2412, 2437 and 2462MHz.

In addition to overcrowding, we also have many problems with interference because the laws of RF here are not respected in my country.

So the idea is that customers can migrate automatically sector when they have problems with the channel that are connected.

Rules will be added to "Access List" that will limit customers, so that only those who have signed up to -75 will be able to connect.


Someone has tested this system?
Will it work?

Ps: my English was translated by Google. :shock:

Re: AP with 3 Omni Antennas

Posted: Wed Sep 09, 2009 5:12 pm
by ericsooter
I think 3 omni's can get messy. If you have overcrowding and interference; you might try horizontal sectors. And if your CPE's support the feature, use narrow channels. Narrow channels will greatly help to mitigate interference.

Eric

Re: AP with 3 Omni Antennas

Posted: Thu Sep 10, 2009 1:41 am
by chainsawman
Thanks Eric. :D

The problem is we already have 50~70 clients connected to this AP, then switch to horizontal will become difficult.
And I see no advantage in switching to horizontal because the interferece is also large.

In addition, our CPEs do not support this function that you mentioned.
CPEs are cheap with limited resources.

Is there any other ideas? :?

Re: AP with 3 Omni Antennas

Posted: Thu Sep 10, 2009 4:21 pm
by valypetre
switch to pannels! you will lose only 2-3 dbm but you'll have defined sectors. try avoiding roaming. just an opinion

Re: AP with 3 Omni Antennas

Posted: Sun Sep 13, 2009 10:27 pm
by jp
You need sectors. Omnis receive interference from all directions. 3 120 sectors would be much better, and provide more gain too.

Re: AP with 3 Omni Antennas

Posted: Mon Sep 14, 2009 12:26 am
by eneimi
I second jp's suggestion.
I have an RB600 with 3 XR2s and 3 sectorials. Great coverage.
3 omnis coming out of that one unit, even 3 omnis on one mast! Unthinkable.

Re: AP with 3 Omni Antennas

Posted: Mon Sep 14, 2009 9:26 pm
by chainsawman
In our case, it would be interesting customers migrate sector automatically in case of interference. And in some regions there are large number of customers and in others not. If I used panels, 1 or 2 would be overcrowded and others without customers.

What I can not understand is why, technically, I can not make this installation method?

Re: AP with 3 Omni Antennas

Posted: Tue Sep 15, 2009 4:46 am
by eneimi
it would be interesting customers migrate sector automatically in case of interference
Give the 3 cards the same ssid and frequency, i.e roaming..
I you are so keen on using omni antennas, why don't you use just one?

Re: AP with 3 Omni Antennas

Posted: Tue Sep 15, 2009 3:41 pm
by chainsawman
The idea is that it has 3 frequencies radiating in all directions in non-ovelapping channels, then we can have greater amount of subscribers and a choice of 3 channels to work.
Will use the same SSID in all sectors; rules will be added in the "Access list" that will limit customers to connect if the signal less than -75; and will limit the max-station-count = 35.

Still a bad idea?