Hi In one environment where many APs join to one WLC, adjacent channel interference--ACI happening is due to very closeness of two AP in RF or physical distance or both? Thank you
Couple of things
In 5GHz ACI is normally avoided by physical separation of APs of atleast 1-2m due to free space path loss.
In 2.4GHz as there are only 3 non overlapping channels if you have AP on channel 1 and another on channel 2 you will have ACI if either can be heard below -85dBM
Nice post about ACI here: http://www.revolutionwifi.net/revolutionwifi/2014/08/80211ac-adjacent-channel-interference.html
Thank you for your reply. I think there is a best distance between any two AP in each model. If the AP is 3502, what is best distance?
I think .. distance between APs would be proportional to power i.e high power more distance.. low power less distance.
It would depend on cell size.
To determine the cell radius given that the inter-access point separation and the percentage of overlap are known, we proceed as follows:
R = the cell radius in feet
We substitute either 15 (for 802.11a) or 10 (for 802.11bg) as the percentage of overlap O, and 45.9 feet for the inter-access point distance d. Solving for R as an approximate root of the function shown above, we determine that the cell radii should be equal to 30.88 feet for a 15% cell-to-cell overlap using 802.11a and 33.4 feet for a 20% cell-to-cell overlap using 802.11bg3.