I've got a remote site that has a total of 25 1131 access points under the control of a 4402 WLC. A few locations in the building (mostly where the heaviest use is), are reporting connection drops and slowness (connection speed changes several times).

I've been looking at the channel assignments. In one particular wing, for example, the two downstairs APs, which are at opposite ends of the hall, are channels 1 and 6. The floor above is has one access point, in the middle, which is also on channel 6. It's been a while since I've checked, but I think I can get at least some sort of signal upstairs in that area from the APs on the lower floor. Shouldn't the WLC have assigned channel 11 to one of those? What are the best options here? Should I force one to channel 11?

There's another wing in this same building that's like that, and I'm thinking it might not be as easy to fix. There's 4 APs in a relatively close area. Two are on channel 1, one on 6, and one on 11.