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Originally Posted by Kushan

Doesn't matter if it's part of the spec or not, a lot of devices will attempt to lock onto the best signal. Our Ubiquity stuff broadcasts a single SSID over both frequencies and will kick devices off that have a poor signal. I'll take screenshots next time I'm logged in.

Of course vendors have proprietary dirty hacks that do that, but there's a reason they're never turned on by default - other than they're proprietary hacks by their nature - they're prone to breaking things and causing instability.

---------- Post added 16-11-2015 at 00:01 ---------- Previous post was 15-11-2015 at 23:58 ----------

Originally Posted by mmm

Looks like there are extensions to the IEEE standards to improve the roaming experience - but maybe these are just being promoted by Apple products?:-

https://support.apple.com/en-gb/HT202628

I've seen a setting for "roaming aggressiveness" in windows Intel clients. There are apps for Android to reduce the tendency to hang on to a weak signal - they didn't work for me just caused regular disconnections.

New Asus Boadcom routers have a feature for "Smart Connect" which is supposed to help distribute clients across available frequencies.

Do we know anything about the SH3 wireless chipset or advanced router functions?

There are plenty of extensions, both proprietary and standardized. Other than Cisco Certified Extensions, they all increase roaming speed but do nothing to give the network any control over roaming decisions.

Fundamentally 802.11 simply lacks this very basic functionality which has been built into 2G phones and pretty much every other wireless technology since 1990.

---------- Post added at 00:04 ---------- Previous post was at 00:01 ----------

Originally Posted by karma mechanic

On the general subject of switching between SSIDs I normally have the SH2 with 2.4 and 5Ghz as the same SSID, then at the other end of the house a DIR-655 again using the same SSID. In the interests of experimentation I have just given them all different names...

Well there's your problem. Giving them different names makes roaming impossible.

On a Windows laptop I set the roaming aggressiveness to the maximum, and connected to SH2 SSID 1 at 300Mbps. Then I walked to the other end of the house and placed the laptop next to the DIR-655. By then the SSID 1 connection had dropped to 13Mbps, but it still didn't switch.

Because you've disabled roaming by giving them different names.

On my Android phone a similar story, although it does appear to switch more readily. Unfortunately arriving from outside the house it gets a lock on 2.4Ghz first. I've just tried an app called SWIFI that purports to assist the switching, it does appear to avoid the prolonged 'hanging-on' to a link.

Again you've deliberately made it impossible to roam, what did you expect?

The only phones that do this well are ones with manufacturer proprietary wireless extensions (e.g. Samsung's "Smart Wireless Switch")

On an unrelated note, both inSSIDer and WiFi Analyzer were showing a steady signal on channel 44 with no MAC. I walked round the neighbourhood and it didn't change. In fact it appeared to stay at exactly the same strength.

Driver bug.