r310 AP distance problem ,client didn't roaming to the closest AP as expected

[patrick_hsieh]

Hi Sirs,
I got 3 AP r310 in office (the signal is  -41/-82/-60 dBm).

I expected the client will connect to the closest AP(-41 dBm) when moving around the office.

Currently, I just set it as default configure.

How should I configure the channel of each AP for better performance?

thanks