Introduction
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3G
network planning comes along with completely new
challenges compared to 2G network planning. Different services and
service
mixes as well as dynamic network behavior (e.g. CDMA cell breathing)
and
technological influences (e.g. soft handover, fast power control) have
to
be considered properly at an early stage of the network planning
process.
Due to the fact that these networks are interference limited, capacity
and
service coverage are not independent, and the planning tool has to cope
with
the mutual influence and to show these dependencies.
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Cell
Areas
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The
cell areas can be determined with the dynamic and the static simulation
module. The cell areas are based on the strongest
received carrier with additional consideration of the coverage.
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MS
Power
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The
dynamic
and the static
simulator provide output
maps indicating the required DL power to reach the considered pixel of
the
simulation area.
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Soft/Softer
Handover
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In
the dynamic simulations
the active set is controlled by the parameters
link_addition, link_drop, link_replace. These parameters therefor
determine also the soft/softer handover areas.
For the result maps and
in the static simulation approach the soft/softer handover areas are
determined based on the mean value of link_add and link_drop.
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Carried
/ Offered Traffic
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With
the dynamic simulation
approach the offered as
well as the carried traffic is measured for all intervals of the
simulation.
This is done for CS services continuously for all active connections
and
for PS services based on the generated and successfully transmitted
data
packets.
Using different traffic loads this enables to evaluate the
network
capacity and to compare different scenarios or parameterisations.
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Blocking
and Dropping
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The
blocking and dropping rates can be evaluated during dynamic network
simulation of CS services. In PS services there is no direct blocking
or dropping implemented but the user rate will degrade with increasing
load.
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