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S12700 V200R013C00 Command Reference

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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uac client-snr threshold

uac client-snr threshold


The uac client-snr threshold command configures the user CAC threshold based on terminal SNR.

The undo uac client-snr threshold command restores the default user CAC threshold based on terminal SNR.

By default, the user CAC threshold based on terminal SNR is 20 dB.


uac client-snr threshold threshold

undo uac client-snr threshold


Parameter Description Value

Specifies the user CAC threshold based on terminal SNR.

The value is an integer that ranges from 5 to 75, in dB.

In most cases, the default value can meet requirements. If there are high requirements for signals, you are advised to set this value to 30 dB.


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.

The configured user CAC threshold based on terminal SNR takes effect for new STAs. When a new STA (or a roaming STA) attempts to connect to an AP, the AP checks the STA's SNR. If the SNR is smaller than the threshold, the AP denies the STA's access.

CAC is implemented in the following modes:
  • 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 terminal SNR has been enabled using the uac client-snr enable command.


# Set the user CAC threshold based on terminal SNR to 50 dB.

<HUAWEI> system-view
[HUAWEI] wlan
[HUAWEI-wlan-view] rrm-profile name huawei
[HUAWEI-wlan-rrm-prof-huawei] uac client-snr enable
[HUAWEI-wlan-rrm-prof-huawei] uac client-snr threshold 50
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Updated: 2019-04-09

Document ID: EDOC1100065659

Views: 116825

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