The uniform density mode uses the notion of simulation radius Rsimu of the interfering transmitter which defines the circular area where the ILTs are spread. The IT-VR path Rsimu is calculated at the very beginning of a simulation cycle and applied in all events. It is defined as:
(Eq. 169)
densitactive is the density of active transmitters and is defined as
(Eq. 170)
where:
- nactive - number of active transmitters set in the scenario for IT-VR path (nactive should be sufficiently large so that the (n+1)th interferer would bring a negligible additional interfering power);
- densit - density of transmitters, 1/km2, user-defined parameter in the table Interferers density of VR-IT path;
- Pit - probability of transmission, user-defined parameter;
- activityit(time) - user-defined temporal activity function (a look-up table). The time value used for calculation is specified in parameter time.
- time - parameter defining which of the values in the above activity function should be used in calculations (e.g. if the activityit(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(time) function will be returning value 0.7).
In case you are given a fixed simulation radius with a defined density of active users, you can evaluate the number the nactive by using this equation which is derived from the equation above.
(Eq. 171)
When you set up your simulation, and the relevant input factor is the simulation radius, it is recommended to use the “None” mode instead of the “Uniform density” mode (In that case, you may simulate the activity of the transmitter, e.g. duty cycle, using the distribution of the transmit power). If you are more interested to consider as an input the density of users (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.