Alvarion BreezeACCESS VL 5.4 System Manual page 93

Operation and Administration
The default value for the Preferred AU MAC Address is 00-00-00-00-00-00
(12 zeros), meaning that there is no preferred AU.
Show Best AU Parameters and Data
The Show Best AU Parameters and Data option displays the applicable
information:
The Neighboring AU Data table displays for each AU that the unit can
communicate with the following details:
♦ MAC Address
♦ SNR of the received signal
♦ Mark – The computed quality mark for the AU.
♦ Full – The association load status of the AU. It is defined as full if the
number of SUs associated with the AU has reached the maximum
allowed according to the value of the Maximum Number of
Associations parameter. An AU whose associations load status is full
cannot be selected as the Best AU, even if its' computed mark is the
highest.
♦ ESSID – The ESSID of the AU.
In addition to the neighboring AU data table, the following information is
displayed:
♦ Best AU Support
♦ Preferred AU MAC Address
♦ Number of Scanning Attempts
♦ Associated AU MAC Address (the MAC address of the selected AU)
♦ Run Time ESSID (the ESSID of the selected AU)
Power Control Parameters
The Automatic Transmit Power Control (ATPC) algorithm simplifies the
installation process and ensures optimal performance while minimizing
interference to other units. This is achieved by automatically adjusting the
power level transmitted by each SU according to the actual level at which it
is received by the AU. To support proper operation of the system with
optimal performance and minimum interference between neighboring
sectors, the ATPC algorithm should be enabled in all units.
The algorithm is controlled by the AU that calculates for each received
frame the average SNR at which it receives transmissions from the specific
SU. The average calculation takes into account the previous calculated
average, thus reducing the effect of short temporary changes in link
conditions. The weight of history (the previous value) in the formula used
for calculating the average SNR is determined by a configurable parameter.
In addition, the higher the time that has passed since last calculation, the
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