"Slow" speed on WiFi - EAP
Hello gents, there is something that I don't understand regarding the speed of the access point EAP245 at 2.4GHz.
It should be 450 Mbps on 2.4G and 1300 Mbps on 5G. But this test is just for the 2.4.
My test setup is simple, 2 PC connected to the same EAP in a room with no obstacle and distance of 3 meters from the PCs to the EAP. No other devices connected to the EAP.
Signal strenght is -35dBm.
Both PCs are equipped with an "ac Wireless Adapter" so both capable to handle - one is Intel(R) Wireless-AC 9260 160MHz and the other one is Intel(R) Dual Band Wireless-AC 3165.
Then I transfer a 1GB zip file from one PC to the other. Even if this is less or no relevant, both PC are settled with Fixed IP and are both in the same subnet (192.168.0.20 and 192.168.0.23).
Channel width is left at 20/40MHz.
The starting situation (before file transfer) is the following:
First question, why I see a 14% usage in Rx/Tx ? The 2 PC are yes connected but if I check their activity speed is very low: one pc 2.5Kb/s and the other 0 Kb/s. Don't think this can occupy 14% of the channel.
Then there is some interference that I suppose is band occupied because presence of others SSID in the environment.
In any case let's say that the starting point is with 18% of occupied channel, but we still have a 72% free that in my poor knowledge means 72% of 450mbps = 324mbps.
Now I start the file transfer but at best I obtain 3.2 MB/s (often going down at 1 or 2mbps) - approx 35mbps let's say that is much less than the 324 mbps, I understand that 450mbps is just ideal but 35mbps it's very distant.
If you see during the transfer the channel utilization goes up to 83% + interference is 94%.
83% of 450mbps means to me 374mbps.
It doesn't matter if I transfer from PC1 to PC2 or viceversa.
Also there are almost no errors or dropped frames.
Can you explain this and what is wrong in my reasoning ?