H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 212)

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Enabling traffic shaping based on link status
Clients near an AP have high RSSI while clients at the border of the coverage area of the AP have low
RSSI. When the network is busy, the weak clients occupy the working channel of the AP for a long time
due to their lower speeds and affect the clients with good RSSI.
The traffic shaping feature identifies the weak clients by checking their signal strength and packet loss
ratio, and dynamically controls their packet throughput to reduce their impact to other clients.
To enable traffic shaping:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable traffic shaping based
on link status.
wlan option traffic-shaping enable Disabled by default.
Configuring the rate algorithm
802.11 protocols each support a set of rates. For example, 802.11g supports the rates of 1, 2, 5.5, 11, 6,
9, 12, 18, 24, 36, 48, and 54. An 802.11 protocol dynamic selects a proper rate based on the channel
quality and history data.
A rate algorithm applied on a radio can avoid improper rate adjustments that can impact network
operation. The system supports multiple rate algorithms, including ARR, HDD, HDD2, and LPL. The
default rate algorithm ARR is applicable in various scenarios.
NOTE:
You can configure the rate algorithm only on 802.11a/b/g radios.
To configure the rate algorithm:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the rate algorithm.
wlan option rate-algorithm { arr
band | hdd | hdd2 | lpl
packet-count up-threshold
down-threshold }
ARR by default.
Enabling channel sharing adjustment
The non-overlapping channels of an 802.11 protocol are very limited. For example, 802.11g has only
three non-overlapping channels. Therefore, an AP can easily detect other APs working on the same
channel, especially in a high-density WLAN. Channel overlapping causes collisions and interference
and reduces WLAN performance. Proper channel planning and power control policies during WLAN
deployment are the major methods to reduce overlapping. In addition, you can perform this task in a live
network to reduce the impact of overlapping.