Asus limiting to 40mhz

[Ryandodo]

I set near the AP Asus RT Ax1800s , my client SINR very very good , I see AP decided to limit my device to 40Mhz , it means AP sending DL traffic to it in 40Mhz and not 80Mh.

What could be the reason such Ap falling abck to 40Mhz? My device support 80MHz HE.

On association I see my devicr advertize 80Mhz support.

Under same case having another device model (another different station) , AP transmiting to it 80Mhz traffic in DL

 

[ColinTaylor]

What could be the reason such Ap falling abck to 40Mhz?

Having the channel set to Auto, or the bandwidth set to 20/40/80.

 

[Ryandodo]

I set near the AP Asus RT Ax1800s , my client SINR very very good , I see AP decided to limit my device to 40Mhz , it means AP sending DL traffic to it in 40Mhz and not 80Mh.

What could be the reason such Ap falling abck to 40Mhz? My device support 80MHz HE.

On association I see my devicr advertize 80Mhz support.

Under same case having another device model (another different station) , AP transmiting to it 80Mhz traffic in DL

Having the channel set to Auto, or the bandwidth set to 20/40/80.

Its already auto? I mean then why with different client different model station undersame rf conditions AP decides to sends to it 80Mhz in DL data but for my client its limiting...

How it relates to auto opition..its already auto

 

[Ryandodo]

The question is with Ap asus expertizes why Ap fallback to 40Mhz even my client support 80Mhz? What could be reason

 

[ColinTaylor]

Sorry, it's difficult to understand what you're saying. Please use Google Translate.

 

[Ryandodo]

Sorry, it's difficult to understand what you're saying. Please use Google Translate.

Im saying that AP using auto.

Within the same AP tried to connect different client model (different station model) and it works , AP sending in DL 80Mhz data

 

[Ryandodo]

The question is that , Why Ap decides to fallback to 40mhz and and to use 80mhz for my client?

AP didnt try to send any data on 80Mhz , only uses 40Mhz

 

[degrub]

Fix the channel width. Don't use AUTO .
The reason it cascades down is related to signal strength, interference, and the client radio effective RF power that the AP can hear .

 

[Tech9]

why Ap fallback to 40Mhz even my client support 80Mhz?

The AP can be set to fixed 80MHz channel bandwidth, near clients will show higher rate link speeds, but this may lead to higher retransmission rates, overall lower efficiency and reduced range. Your router perhaps used 40MHz channel bandwidth because of detected interference. Pushing it manually to 80MHz may not improve your Wi-Fi experience.

 

[Ryandodo]

Hmmm , but SINR is fine and very very high on the environment including rssi is very good.

In both stations , station1 connected to Ap , AP starts DL traffic in 40Mhz.

Station2 different model connected to Same Ap , under same rf conditions/sinr same as station1.
Ap starts sending DL trafgic to station2 in 80Mhz.

The query here is why AP decides to send to station1 DL traffic in 40Mhz and not in 80Mhz?

Both stations has same association capbilities and both support 80Mhz.

 

[Tech9]

The query here is why AP decides to send to station1 DL traffic in 40Mhz and not in 80Mhz?

Because this is how it works on Auto and the environment may be changing dynamically every second before the router's GUI can reflect the changes. Other variable is the unknown client. If you don't like the way it works - fix the channel bandwidth manually to 80MHz.

 

[degrub]

Are we talking about 2 different radio/chipset implementations or the exact same radio/chipset/driver on each ?

 

[Ryandodo]

Yes its totally different chipset but both are connecting to AP with same 5g channel

 

[degrub]

no surprise then. Despite having "standards" that are implemented against in the design and testing, there will always be differences/mismatches between two devices adhering to the same standard if they are from different suppliers. The wireless N days were one such example where if you wanted the network to work reasonably well, you bought all the equipment from the same manufacturer. Anything else was likely to introduce incompatibilities and poor if any performance.

 

[Tech9]

RT-AX1800S is one of the cheapest ASUS routers with integrated radios MediaTek SoC. If someone is taking the specifications listed too seriously I'm sure there will be other "Why" questions around this device.

 

[Ryandodo]

RT-AX1800S is one of the cheapest ASUS routers with integrated radios MediaTek SoC. If someone is taking the specifications listed too seriously I'm sure there will be other "Why" questions around this device.

Sure so on this case to understand why Mediatek soc works perfectly with asus routers what specification could we have? Any link you could share to read?

 

[Ryandodo]

I configured my AP to work with fixed bandwidth and not auto , it works, thanks!