How can user avoid the wireless disconnection when the AP change the channel by DCS?
Yes, this is provided through the “Enable DCS client Aware” feature. The APs on your network do not change channels as long as any wireless clients are connected to them.
After you enable the feature, the AP will do DCS only when the all clients are disconnected with AP at the doing DCS time.
You can use the schedule DCS, for example, to set DCS in the midnight, to avoid the clients are disconnected when they are working.