WLAN channel bandwidth


WLAN channel bandwidth.
The channel bandwidth in HT20 mode is 20 MHz, and the channel bandwidth in HT40 mode is 40 MHz. Two neighboring 20 MHz channels are bundled to form a 40 MHz channel. One channel functions as the main channel, and the other as the auxiliary channel. The main channel sends Beacon packets and data packets, and the auxiliary channel sends other packets. When the HT40 mode is used in the 2.4 GHz frequency band, there is only one non-overlapping channel. Therefore, HT40 is not recommended in the 2.4 GHz frequency band.
During channel bundling of two neighboring 20 MHz channels, if the center frequency of the auxiliary 20 MHz channel is lower than that of the main channel, plus is marked; otherwise, minus is marked. For example, 149plus indicates that the 20 MHz channel where the center frequency 149 resides and the 20 MHz channel where the center frequency 153 resides are bundled to form a 40 MHz channel.
For 802.11ac, you can also configure 80 MHz and 160 MHz channels.

Other related questions:
Types of channel bandwidth supported by OSC boards
In general, OSC boards support the following channel bandwidth: 4.096 Mbit/s, 16.896 Mbit/s, and 155.52 Mbit/s.

Channel planning for WLAN devices
There are limited non-overlapping channels on the 2.4 GHz frequency band. If channels of neighboring APs conflict, channel interference occurs and user access experience is degraded. You are advised to plan channels as follows: - Make an AP channel plan before performing data configurations. You are advised to manually configure AP channels. Automatic channel adjustment is not recommended. - If channels of neighboring APs from other vendors conflict with those of Huawei APs, negotiate with the vendors to change overlapping channels. - Use spatial staggered channels to increase network capacity. - Channels of neighboring APs are staggered. For example, the 2.4 GHz radio channels are deployed in a fixed sequence of 1-6-11-1-6-11. - The 5 GHz frequency band is preferred when it is allowed. On the 5 GHz frequency band, non-overlapping channels in HT20 mode include channels 149, 153, 157, 161, and 165.

Adjustment of working channels of WLAN radios
Manually adjust working channels of WLAN radios. [HUAWEI] wlan [HUAWEI-wlan-view] ap 0 radio 0 or radio-profile name r1 [HUAWEI-wlan-radio-0/0] channel-mode fixed [HUAWEI-wlan-radio-0/0] channel 20mhz 6 Restore to the default channel by running the channel 20mhz 1 command. 20mhz indicates that the channel bandwidth is 20 MHz, which can be set to 40 MHz, 80 MHz, or 160 MHz. Web platform: - Choose Configuration > WLAN Configuration/AP Management > Radio Profile, and change Channel mode to fixed. - On the WLAN Configuration page, select 2.4 GHz or 5 GHz in the radio configuration area. Select the radio profile, channel bandwidth, channel, and power level in fixed mode. (To modify information, delete the existing configurations first. Then add a new radio profile and configure the parameters as required.) To check the working channel, run the display actual channel-power command. The following non-overlapping channels are available in mainland China: -2.4 GHz: 1, 6, 11 -5 GHz: 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165 Note: 1. If the channel mode is changed from auto to fixed, APs will run in a fixed channel. 2. After automatic calibration is complete, the calibrated channel will be recorded after you disable the automatic calibration function and change the channel mode to fixed. This is applicable to scenarios with multiple APs. 3. To enable automatic calibration, ensure that the channel mode is auto. Otherwise, change the channel mode to auto first. 4. For Fit APs, the configurations take effect only after being delivered. 5. HT40 is not recommended in 2.4 GHz.

How to configure channels and power for WLAN devices
Configure radio channels and power for WLAN devices manually or by configuring radio calibration. -Manual configuration Take the configuration on the AC as an example. Users can adjust the channel and power using the channel 20mhz xx and power-level commands. [AC6005-wlan-radio-0/0]display this # radio-profile id 0 channel 20MHz 13 power-level 2 # return Configure channels and power for Fat AP devices in the radio interface view.

How to configure dual frequency
Configure and optimize the RF based on the actual network environment so that the APs can have better capabilities of transmitting and receiving RF signals, improving the WLAN signal quality. For detailed configurations, see the following: V200R007 1. AC CLI: Configuring a Radio WEB: Radio Management 2. FAT AP CLI: Configuring a Radio WEB: Radio Management V200R006 1. AC CLI: Configuring a Radio WEB: Radio Management (V200R006C10) and Radio Management (V200R006C20) 2. FAT AP CLI: Configuring a Radio WEB: Radio Management (V200R006C10), common APs Radio Management (V200R006C20), and central APs Radio Management (V200R006C20) V200R005 AC: Configuring a Radio FAT AP: Configuring a Radio

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top