Configuring Radio Calibration
Radio calibration can dynamically adjust channels and power of APs to ensure that the APs work at the optimal performance.
Context
When radio calibration automatically triggers power adjustment or channel adjustment, an alarm (WRFM_1.3.6.1.4.1.2011.6.139.3.24.1.19 hwRadioPowerChangedNotify) indicating that the radio power changes may be generated.
- Auto mode: The device implements radio calibration at certain intervals (the interval is specified by interval and the default interval is 60 minutes).
In auto mode, the device continuously detects neighbors and updates neighbor information. When a radio calibration interval is reached, global radio calibration is triggered.
The auto mode applies to coverage hole compensation, coverage hole compensation reversal, and partial radio calibration.
- Manual mode: Radio calibration is not automatically implemented by the device but manually triggered through the calibrate manual startup command.
- Schedule mode: The device triggers radio calibration at the time specified by the parameter time.
Global radio calibration is implemented on all APs.
Radio calibration does not take effect on radios enabled with WDS functions.
Radio calibration is not applicable to scenarios where APs cannot detect each other, for example, APs use directional antennas, are far from each other, or have obstacles between them.
Pre-configuration Tasks
- Basic WLAN-Fat AP Service Configurations
- Configuring the channel mode and power mode in a radio profile to auto for APs (for details, see Configuring a Radio Profile)
Procedure
- Run system-view
The system view is displayed.
- Run wlan
The WLAN view is displayed.
- Run calibrate enable { auto [ interval interval-value [ start-time start-time ] ] | manual | schedule time time-value }
The radio calibration mode is configured.
The default radio calibration mode is manual.
- (Optional) Run calibrate sensitivity { low | medium | high }
The radio calibration sensitivity is set for the device.
By default, the radio calibration sensitivity of the device is set to medium.
- (Optional) Configure global calibration channels.
- Run calibrate { 2.4g | 5g } channel-set channel-value
The calibration channel set is configured.
By default, a global calibration channel set contains channels corresponding to global country codes. The default calibration channels corresponding to the country code China do not include channels 36 to 64.
When configuring a calibration channel set, avoid using radar channels.
The channels you configure must be supported by the terminals; otherwise, the terminals cannot discover wireless signals. For example, when the country code is set to China, 5 GHz channels 36, 40, 44, 48, 52, 56, 60, and 64 can be configured. However, most terminals do not support these channels currently. If these channels are configured, the terminals cannot discover wireless signals. In this case, you can configure 5 GHz channels 149, 153, 157, 161, and 165, which are supported by the terminals.
When configuring 40-MHz calibration bandwidth, check whether channels of the corresponding bandwidth exist under the country code.
To ensure a good calibration effect, you are advised to configure at least three calibration channels.
- Run calibrate { 2.4g | 5g } channel-set channel-value
- Run quit
Return to the WLAN view.
Verifying the Configuration
- Run the display radio-profile { all | id profile-id | name profile-name } command to check the channel probe interval for radio calibration and radio calibration status in a specified radio profile.
- Run the display calibrate channel-set command to check the calibration channels and bandwidth that take effect.
Follow-up Procedure
To manually trigger radio calibration, set the radio calibration mode to manual and run the calibrate manual startup command. The device implements radio calibration only after the calibrate manual startup command is executed. Before the next radio calibration is triggered, the channel and power remain unchanged.