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                                                            (Eq. 169)

...

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

                                                         (Eq. 170)

where:

• • n^active - number of active transmitters set in the scenario for IT-VR path (note htat 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 above equation above.

                             (Eq. 171)

When you set setting up your simulation, and if the relevant input factor 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.