If I use square topology instead keeping routers at center: if 1 is main broadcasting router 2 gets internet from 1 3 gets internet from 1 or 2 4 gets internet from 1 or 2 how much should be length...

Installed openwrt, planning to use 802.11r wifi fast transition

I am planning to host an array of CPE 220 on a pole like structure, they will beam 360 degree (13km long range radius). I wonder how many CPEs required on the tower to cover 360 degree? reference...