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	A13.2.2
	A13.2.2

The In the mode uniform density mode uses the notion of simulation radius , R_simu of the interfering transmitter which defines the circular area where the ILTs are spread. The IT-VR path R_simu R_simu in the ILT-VLR path is calculated at the very beginning of a simulation cycle and applied in all events. It is defined as:

...

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body	${{R}_{simu}}=\sqrt{\frac{{{n}^{active}}}{\pi \ \times \ dens_{ILT}^{active}}}$

(Eq. 178)

dens_it^active isthe density of active transmitters and is defined as follows:

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Image Removed (Eq. 170

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body	$den{{s}_{ILT}}^{active}=den{{s}_{ILT}}.{{p}_{ILT}}.activit{{y}_{ILT}}(time)$

(Eq. 179)
where:
n^active - number of active transmitters set in the scenario for IT-VR path (note that n^active should be sufficiently large so that the (n+1)^th interferer would
bring
contribute with a negligible additional interfering power);
dens_it - density of transmitters, 1/km2, user-defined parameter in the table Interferers density of
VR
ILT-
IT
VLR path;
P_it - probability of transmission, user-defined parameter;
activity_it(time) - user-defined temporal activity function (
a
i.e. look-up table). The time value used for calculation is specified in the parameter time (see below).
time - parameter defining which of the values in the above activity function should be used in calculations (e.g. if the
activityit
activity(time) function contains three pairs: (1;0.5), (2;0.7), (3; 0.9)
,
and the time parameter is set to 2, then the
activityit
activity(time) function will
be returning
return a value 0.7).

In case you are given a fixed simulation radius with a defined density of active users is provided, you can evaluate the number the n_active users can be evaluated by using this the following equation, which is derived from the equation above.
Image Removed (Eq. 171)

...
above equation.
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body ${{n}_{active}}=den{{s}_{transmitter}}.pro{{b}_{transmission}}.\pi \ {{\left( R_{simulation}^{{}} \right)}^{2}}$
(Eq. 180)

When setting up your simulation, if the relevant input parameter is the simulation radius, it is recommended to use the mode “None” mode instead of the “Uniform density” mode (. In that case, you may simulate the activity of the transmitter , emay be simulated using e.g. the parameter duty cycle, using the which defines a distribution of the transmit power). If you are more interested to consider as an input the density of users
If the relevant input parameter is the user density (i.e. without setting the simulation radius as input), it is recommended to use the “Uniform density” mode.
For this mode, the path distance factor is fixed to a uniform polar distance distribution with a maximum distance of 1 and is not editable.

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