As posted in my previous blog, I will be writing some articles about vendor presentations on WFD2. I’ve picked up WFD2 video n. 152 on vimeo to start with.
Ruckus Wireless introduced a feature called Channelfly in the 9.3 main stream code (this feature has been tested for some time now in 9.2.x code but with selected customers). Channelfly is a method of statistically picking the most potent channel (ie, the channel with the most capacity). It uses statistical prediction (based on the info gathered in the break in period) to allocate channel with the most capacity (looking at throughput (L3) not data rate (L2)). Ruckus has posted a video explaining predictive capacity here (its still weird seing David Stiff running with the pack after all this years preaching Cisco) and the Channelfly whitepaper PDF can be found here.
Basic idea of Channelfly is that the capacity is spread trough the whole spectrum and not just on the standard channels (channel 1, 6 and 11 for 2.4 GHz). In other words, even in dense deployments, non standard channels like 4 or 10 may carry more capacity and if so it should be used. Furthermore, based on the data gathered in measuring the throughput on channels, the AP may be predicting the time of the day that one channel is better and on another time of the day that the other channel preferred.