To make things worst, I believe the industry is working on the 5G NR of LAA and Multifire.....
Yep, more noisy neighbour and channels.
It's more than you know, and can possibly consider... LAA/Multifire is going to happen, but that's 5GHz only from an 802.11 perspective...
One of the issues with 802.16e, and a fair amount of study on this, was the interaction of the 802.16e scheduled MAC in shared space with 802.11 - 16e basically
bogarted the channel... This was similar to the Google and other objections to LTE in unlicensed spectrum - once a scheduled MAC gets ahold of a channel, it basically owns it... and the 802.11 traffic suffered big time...
bogart - To keep something all for oneself, thus depriving anyone else of having any. A slang term derived from the last name of famous actor Humphrey Bogart because he often kept a cigarette in the corner of his mouth, seemingly never actually drawing on it or smoking it. Often used with weed or joints but can be applied to anything.
11ax in this respect is no different than LTE-LAA/MultiFire or 16e - and 11ax is both ISM and UNII bands... unlike 11ac as IEEE intended...
It'll take a while perhaps, as devices go through life cycle upgrades - but eventually, legacy equipment is going to starve for bandwidth, and it's going to be a lot worse than a congested 802.11 b/g/n/ac network as we know it.
11g/n got along ok, 11b legacy often caused issues, but 11b aged out fairly quickly, mostly due to the WEP/WPA transition where many 11b STA's couldn't make that jump -
11 a/n/ac - has and current does get along very well...
The issue now is that we have a tremendous amount of 11n/11ac gear, and 11ax is going to be fairly disruptive - not at first, but over time, it will...
