H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 356)

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Radio Configuration
The sample output in this manual was created on the WX5004. The output on your device may
vary.
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or cannot be modified.
The models listed in this manual are not applicable to all regions. Please consult your local sales
office for the models applicable to your region.
Radio Overview
Radio signals are susceptible to surrounding interference. Causes of radio signal attenuation in
different directions are very complex. Therefore, we need to make careful plans before deploying a
WLAN network. After WLAN deployment, the running parameters still need to be adjusted because the
radio environment is always varying due to interference from mobile obstacles, micro-wave ovens and
so on. To adapt to environment changes, radio resources such as working channels and transmit power
should be dynamically adjusted. Such adjustments are complex and require experienced personnel to
implement regularly, which brings high maintenance costs.
WLAN radio resource management (RRM) is a scalable radio resource management solution. Through
information collection (APs collect radio environment information in real time), information analysis (The
AC analyzes the collected information), decision-making (The AC makes radio resource adjustment
configuration according to analysis results), and implementation (APs implement the configuration
made by the AC for radio resource optimization), WLAN RRM delivers a real-time, intelligent, integrated
radio resource management solution, which enables a WLAN network to quickly adapt to radio
environment changes and keep staying in a healthy state.
Channel Adjustment
Working channels available in WLANs are few. For example, there are only three working channels in a
2.4G WLAN network. As a result, channel overlapping is very easy to occur. In addition, other radio
sources may exist in a WLAN, such as radar, micro-wave ovens, which interfere with the operation of
APs. All these problems can be resolved through dynamic channel adjustment.
With dynamic channel adjustment, each AP can be assigned with the best channel in real time to avoid
co-channel interference and interference from other radio sources, and thus continuous communication
can be ensured to provide for high-reliability data transmission.