User's Manual

Table Of Contents
Menus and Parameters
by the AU. To support proper operation of the system with optimal performance
terference between neighboring sectors, the ATPC algorithm
ed in all units.
ntrolled by the AU that calculates for each received frame the
average SNR at which it receives transmissions from the specific SU. The average
count the previous calculated average, thus reducing the
es in link conditions. The weight of history (the
sed for calculating the average SNR is determined
ed
ot in the configured target range, the AU
er-down message. The target is that each
optimal level, or as high (or low) as possible if the
onditions.
with
transmit power level.
provide
here may be a need to decrease the transmitted
pport relatively small cells and to minimize the
eration of neighboring cells, or for compliance with local
4.2.6.2.7.1
ters are defined separately for different modulation
d
algorithm after either power up or losing synchronization with the
and minimum in
should be enabl
The algorithm is co
calculation takes into ac
effect of short temporary chang
previous value) in the formula u
by a configurable parameter. In addition, the higher the time that has passed
since the last calculation, the lower the impact of history on the calculat
average. If the average SNR is n
transmits to the SU a power-up or a pow
SU will be received at an
optimal range cannot be reached because of specific link c
Each time that the SU tries to associate with the AU (following either a reset or
loss of synchronization), it will initiate transmissions using its Transmit Power
parameters. If after a certain time the SU does not succeed to synchronize
the AU, it will start increasing the
In an AU the maximum supported transmit power is typically used to
maximum coverage. However, t
power level in order to su
interference with the op
regulatory requirements.
In some cases the maximum transmit power of the SU should be limited to
ensure compliance with applicable regulations or for other reasons.
Different power levels may be used for different modulation levels to optimize
performance taking into account the different modulation schemes as well as
possible regulatory restrictions.
Transmit Power
The Transmit Power parame
levels.
In the AU, the Transmit Power parameter defines the fixed transmit power level
and is not part of the ATPC algorithm.
In the SU, The Initial Transmit Power parameter defines the fixed transmit power
level when the ATPC algorithm is disabled. If the ATPC Option is enabled the
value configured for this parameter serves for setting the initial value to be use
by the ATPC
AU.
Operation and Administration
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