> You can stick to 802.11r only by lowering the transmission power and have all the APs on the same channel
Fast roaming has not, does not, and never will require APs be on the same channel. Only the SSID and password needs to match.
Setting them to the same channel will cause the APs to interfere (when they can't "hear" each other) or block each other from transmitting, or both. You set APs near each other so they are on non-overlapping bands. Always.
This is basic WiFi networking 101
> Samsung is known to push protocol support early: 802.11r in 2013
802.11r was released in 2008 and rolled into 802.11-2012.
Fast roaming has not, does not, and never will require APs be on the same channel. Only the SSID and password needs to match.
Setting them to the same channel will cause the APs to interfere (when they can't "hear" each other) or block each other from transmitting, or both. You set APs near each other so they are on non-overlapping bands. Always.
This is basic WiFi networking 101
> Samsung is known to push protocol support early: 802.11r in 2013
802.11r was released in 2008 and rolled into 802.11-2012.
Also, the iPhone 5S (2013) has 802.11r support.