I'm trying to understand how WiFi bitrate adaptation works in general.
I've started by reading this paper about Minstrel, the typical bitrate adaptation algorithm found in Linux.
To get more hands-on, I've explored the statistics used by Minstrel in the Linux laptops I'm working with, which are exported in the /sys/kernel/debug/ieee80211/phy*/*/stations/*/rc_stats file (they're even automatically exported in csv format, which is awesome).
I've tried to find the same files in a router running openWRT... but couldn't find them!
Why could this be?
- Does openWRT even use Minstrel?
- Is bitrate adaptation done at the WiFi NIC level in routers?
- Do I need to enable special configuration options and build a custom openWRT image to get these files?
The ideal outcome would be for me to enable the rc_stats file in openWRT, if possible.
Info about my system:
HW: Ubiquiti UniFi AC Lite
SW: LEDE 17.01.6, r3979-2252731af4