In a very busy/noisy environment, including when the bandwidth crowding is self-inflicted due to specific very dense AP environments, I have found that 40mhz bands or even 20mhz bands provided a better experience and provided more bandwidth than the vast majority of users ever actually tried to use day to day.
Perbedaan 20MHz dan 40MHz. Pada artikel ini, kita akan membahas perbedaan antara 20MHz dan 40MHz dalam konteks penggunaan WiFi. Baik 20MHz maupun 40MHz adalah lebar kanal dalam jaringan WiFi, dan memilih antara kedua opsi ini dapat mempengaruhi kualitas dan kecepatan koneksi internet Anda.
Channel Width: Auto / 20MHz / 40MHz / 80MHz (ตอนนี้เป็น Auto) ผมใช้ Wifi Analyzer ดูแล้ว มีสัญญาณ Wifi ของข้างบ้านซ้อนกันเยอะมากครับ ขอบคุณครับ
The default driver restricts to 20MHz transmission. The mimo_bw_cap will remove this restriction and allow 40MHz to be activated. Please use this command: wl mimo_bw_cap 1. Note: This command must be set in the down position prior to the chanspec command. View solution in original post. 3 Likes. Reply.
- But if you are using 20 MHz on too few antennas per area and you have allowed alot of bandwidth for every individual user you could easily run into max airtime when users start downloading stuff. both APs and clients are welcome to select 40MHz or 20MHz rates. There are rate control algorithms on both end that won't even choose 80MHz MCS
If the wifi point is set to support all modes, then the client will connect. In addition, the speed can be set to 20Mhz or both 20Mhz/40Mhz. It will use 40Mhz if available or fall back to 20Mhz otherwise. There is no 40Mhz only option. So just because the network offers 40Mhz, doesn't mean it stops support for the 20Mhz also.

Apple to this day locks out 40 MHz bandwidth mode in 2.4 GHz entirely on its AirPort Extreme and other 802.11n routers and combo devices. Intel initially followed suit with its 802.11n Centrino wireless adapters, but has since relented. Intel adapters now allow 40 MHz mode in 2.4 GHz to be set, but ship default set to 20 MHz only mode.

4XVD7.
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    • wifi 20mhz vs 40mhz