Campus Wi-Fi Project suggestion

hi friends,

Currently we are engaged in a Campus Wi-Fi project. We planned to install 20 Aps. The site have 7 floors and we planned 3 Aps for each floor. We are using Groove A-2hn with omni antennas. In this case what we scare is frequency collisions. So friends pls guide me in configuration as well as some general suggestions.

I recommend that you pay close attention to the radation pattern of your antenna. Also measure your signal fade so as to have one frequency become quiet in any area where your going to reuse that frequency.