Natural load balancing can also come from not using omni directional antennas. You have to think about the logic of a client. Assume you have an entryway into an office and the clients first connect to that AP. Then they go a little further in the office but still have plenty strength towards the first AP so they will never roam. The only way a client will actually join the AP right on top of it is if the user disables and re-enables the WiFi. So yes you have roaming suggestions from the AP's through 802.11v.  But in some spaces you might want to go MR42E with a patch antenna pointing straight down causing a more downtilt signal and a less spread out signal.  This will cause the clients to drop off one AP and connect to the next. ... View more