Industry Forums > Wireless Service Providers > How can i use single Freq. in 4 Canopy AP's in one tower?

How can i use single Freq. in 4 Canopy AP's in one tower?

Canopy allows channel re-use on back-to-back APs, with appropriate timing parameters of course. So it might be difficult to achieve your goal with just one channel....maybe narrow up the beamwidth on your APs?
Doing so would cost you coverage area of course.

reply to Jafster
You can get away with two channels, not one. Are you GPS synced?

reply to Jafster
It is my experience that one AP can service about 50 customers without too much overload.

Do you *REALLY* need 4 APs on that tower?

Canopy will have severe problems if you try to overlap 4 APs on the same channel on the same tower, as would any other technology. It is just a bad idea, period.
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reply to wirelessdog
Yes i have a CMM4 and a GPS, currently i am suing two freq. per tower but i really need to change it into one.

and i have 4 AP's in sa single tower already and we need that setup atleast cover the place.

reply to DaDawgs
well i hope i can do that. problem is that we want cover 120 deg. and that is the reason why i/we want to use a single freq.

i hope that there is a way to solve my problem.

im sorry what we want is a 360 coverage using 1 freq.

reply to Jafster
If you really really want to run 4 separate APs on a single tower ... there is only one reasonable solution to minimize the interference.

Change the polarization of 2 of the APs and their SMs. So opposite APs run same polarization while adjacent APs run opposite polarization.

It might work. Or you could switch to connectorized AP's and two 180 degree sector antennas which would probably give you better performance anyway.

Lets take a step back.

Why do you feel the need to use one frequency? Post some screen shots of your spectrum analysis.

reply to Chessie
Chessie, if we can change the polarization do you think we can use a single frequency for 4 ap's in a tower?

reply to wirelessdog
wirelessdog we dont have enough freq. we are allowed to use only 3 frequencies but we have 3 Towers so i want to use 1 freq. in each tower. our towers are 1 to 2 mile apart.

reply to Jafster
If all three towers can see each other, and they are that close, I would just use one of them only and use 4 sectors. That way you can reuse the channels that are back to back. So, the tower uses 2 channels instead of 3. You will have far less trouble with sectors instead of a single omni.

This way, you can use the other two towers for other freqs, if you want.

reply to Jafster
Three frequencies split between three towers will work fine. You need to make sure everything is properly synced and use frequencies correctly.

reply to Jafster

Apples and oranges. We are dealing with Canopy in this application. Throw everything you know about 802.11 out - it doesn't apply.

The diagram, while it is helpful on a non-canopy setup, really doesn't apply to the OP's situation.

reply to Jafster
Canopy GPS sync allows one to reuse the same frequency twice on each tower. That would be 2 frequencies per tower for the OP. The OP has a total of three frequencies available. The frequencies can be reused on each tower as long as the AP's are not facing each other. Heck, the AP's can truthfully probably be facing each other without any service issues. This is why competing Canopy WISP's can live in each other's territory so efficiently as long as the coordinate things like dl%, control slots and range.

This is how we can run six 60 degree 900mhz sectors per tower with only three non-overlapping frequencies. It is also how channels can be used over and over and over again.

To the OP: The question still hasn't be answered if your towers are correctly GPS sync'ed. Based on your questions I would guess not so I would suggest a starting point of posting a simple diagram of your network along with your dl%, control slots, and range/distance settings per tower and exactly how you do GPS sync per tower.

reply to wirelessdog