5.4 Transmitter to Receiver Path

• Introduction
• 5.4.1 Relative location
• 5.4.2 Coverage radius
• 5.4.3 Local environment
• 5.4.4 Propagation Model

Introduction

3 elements form the path between the VLR and the VLT or the ILR and ILT as illustrated in Figure 148.

Figure 148: Transmitter to Receiver Path illustration

 

 

Figure 149: Transmitter to Receiver Path GUI

5.4.1 Relative location

• When the Correlated distance option is checked, the positions of the receiver and transmitter are geographically fixed with respect to each other (e.g. co-located or constantly spaced base stations). The transmitter is considered a reference centre.

• When the correlated distance is unchecked, the receiver is randomly moving around the transmitter. There are 2 primary options to define type of mutual placement of VLR with respect to VLT. 

See ANNEX 12: for further details on the algorithm and conventions. 

 

 

 

 

 

 

5.4.2 Coverage radius

A coverage radius is calculated for both the victim link and the interfering link. It is the

for the victim link (VLR-VLT) and the  for the interfering link (ILR-ILT) (see Annex A13.1). The receivers will be randomly deployed within the area centred on the transmitter and delimited by the coverage radius if the non-correlated option is selected.

 

Three different modes are available for calculating the maximum radius .

• User-defined radius allows directly entering the maximum radius (See Annex A13.1.1); 

Figure 151: User-defined coverage radius dialog box

 

 

Table 16: Description on User-defined coverage radius

 

 

Figure 152: Noise limited network coverage radius dialog box

 

The coverage radius in the noise-limited network is defined by the parameters of Table 17. Note that the input parameters for the Noise-limited network interface are set to zero by default in order to independently define the radius from some parameters set elsewhere in the link.

 

 

Traffic-limited network option will calculate the coverage radius, based on the formula for traffic-limited network. If this option is chosen, a set of input boxes will appear below allowing user to enter specific parameters required for this calculation (See Annex A13.1.3). 
    

 

The consistency of this parameter should be verified against the sensitivity, so that if a receiver is placed at given distance (e.g. at the maximum coverage radius) the received power is higher than the sensitivity for a reasonable percentage of occurrences (availability).

5.4.3 Local environment

The percentage of transceivers being indoor and outdoor can be selected thanks to this panel. It will work in combination with the chosen propagation model that you will select. By default the transmitter and receiver are located outdoor. For each elements of the link, it is possible to add   or remove   a probability of indoor.

 

Figure 154: Example of setting up the outdoor/indoor ratio

 

You can edit the field by double cliking

Figure 155: Graphical interface to edit the probability, wall loss and associated standard deviation

 

 

Table 19: Local environment and wall loss

Note that when opening a workspace created prior to SEAMCAT version 5, all settings are mapped to the current SEAMCAT version running on your machine. As the parameter local environment didn’t exist before version 5, a warning may appear indicating that “local environments are skipped for multiple interfering links”. This means that SEAMCAT was not able to automatically set the parameters of the local environments (most likely due to a scenario with multiple interferers). Therefore, there is a need to edit the local environment manually.

 

5.4.4 Propagation Model

A suitable propagation model can be selected to be applied when calculating signal loss along the path between transmitters and receivers. Further information on propagation models are presented in detail in ANNEX 17.