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Fat AP and Cloud AP V200R010C00 Command Reference

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uac channel-utilization threshold

uac channel-utilization threshold


The uac channel-utilization threshold command configures the user CAC threshold based on channel usage.

The undo uac channel-utilization threshold command restores the default user CAC threshold based on channel usage.

By default, the user CAC access and roaming thresholds based on channel usage are both 80%.


uac channel-utilization threshold access access-threshold [ roam roam-threshold ]

undo uac channel-utilization threshold


Parameter Description Value
access access-threshold

Specifies the user CAC access threshold based on channel usage.

The value is an integer that ranges from 1 to 100, in percentage.

roam roam-threshold

Specifies the user CAC roaming threshold based on channel utilization, that is, the channel utilization threshold for reassociated roaming STAs.

The value is an integer that ranges from 1 to 100, in percentage.


RRM profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On WLANs where many users exist, such as WLANs in high density scenarios, users compete fiercely to occupy the channels as the number of online users increases. As a result, network quality deteriorates. To ensure network access experience of online users, configure the user CAC function. The user CAC function allows an AP to control user access based on the thresholds specified according to the radio channel usage, number of online users, or terminal SNR, which enables provisioning of high-quality network access services.

  • User CAC based on channel usage uses a complex algorithm but is accurately implemented to ensure service quality. This mode is recommended when service types and traffic volumes differ greatly among users.

  • User CAC based on the number of users is less accurate but uses a simple algorithm. This mode is recommended when most users have the same type of services and similar service traffic volumes.

  • SNR-based user CAC controls access from weak-signal users, applicable to scenarios where the WLAN has good signal coverage and weak signals only at the edge of WLAN coverage areas.

User CAC based on channel usage and user CAC based on the number of access users cannot be configured simultaneously, but either of them can be configured together with user CAC based on terminal SNR.


The user CAC function based on channel usage has been enabled using the uac channel-utilization enable command.


# Set the user CAC access and roaming thresholds both to 50%.

<Huawei> system-view
[Huawei] wlan
[Huawei-wlan-view] rrm-profile name huawei
[Huawei-wlan-rrm-prof-huawei] uac channel-utilization enable
[Huawei-wlan-rrm-prof-huawei] uac channel-utilization threshold access 50 roam 50
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Updated: 2019-11-21

Document ID: EDOC1100064352

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