H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 364)

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Figure 385 Dynamic channel adjustment
Transmit power control
Traditionally, an AP uses the maximum power to cover an area as large as possible. This method,
however, affects the operation of surrounding wireless devices. Transmit power control (TPC) is used to
select a proper transmission power for each AP to satisfy both coverage and usage requirements.
Whether the transmission power of an AP is increased or decreased is determined by these factors: the
maximum number of neighbors (detected neighbors that are managed by the same AC), the neighbor
AP that performs power detection, and the power adjustment threshold.
NOTE:
You cannot configure the neighbor AP that performs power detection and the power adjustment threshold
on the web interface.
As shown in Figure 386 , APs 1, 2 and 3 cover an area. When AP 4 joins, the default maximum neighbor
number 3 (configurable) is reached. Then, the APs perform power adjustment. You can find from the
figure that they all reduce their transmission power.