smart-roam snr-margin

Function

The smart-roam snr-margin command sets the SNR difference threshold that triggers terminal roaming.

The undo smart-roam snr-margin command restores the default SNR difference threshold that triggers terminal roaming.

By default, the higher and lower SNR difference thresholds that trigger terminal roaming is 15 dB and 6 dB, respectively.

Format

smart-roam snr-margin high-level-margin high-level-margin low-level-margin low-level-margin

undo smart-roam snr-margin

Parameters

Parameter	Description	Value
high-level-margin high-level-margin	Specifies the higher SNR difference threshold that triggers terminal roaming.	The value is an integer that ranges from 10 to 20, in dB.
low-level-margin low-level-margin	Specifies the lower SNR difference threshold that triggers terminal roaming.	The value is an integer that ranges from 3 to 15, in dB.

Views

RRM profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After smart roaming is enabled, you can run the smart-roam snr-margin command to set the SNR difference threshold that triggers terminal roaming. Before roaming, a STA compares the SNR of the current AP and neighboring AP and roams only when the SNR difference between the two APs is larger than the specified difference threshold.

There are two thresholds: higher and low SNR difference thresholds applicable to good and poor radio environments, respectively. A STA actively roams in good radio environments where the signal strength of the current AP is greater than or equal to 35 dB, and the SNR difference between the current AP and neighbor AP exceeds high-level-margin. In poor radio environments, the STA roams when the SNR of the current AP is smaller than 35 dB and the SNR difference between the current and neighbor APs is larger than low-level-margin.

You are advised to set high-level-margin larger than low-level-margin.

Prerequisites

The smart roaming function has been enabled using the undo smart-roam disable command.

Example

# Set the higher and lower SNR difference thresholds that trigger terminal roaming to 10 dB and 6 dB, respectively.

<HUAWEI> system-view
[HUAWEI] wlan
[HUAWEI-wlan-view] rrm-profile name huawei
[HUAWEI-wlan-rrm-prof-huawei] undo smart-roam disable
[HUAWEI-wlan-rrm-prof-huawei] smart-roam snr-margin high-level-margin 10 low-level-margin 6