MULTITRANSMITTER COVERAGE PARAMETERS
Once the service is selected and the multi-coverage study is created, the dialog will open to configure study parameters.
The parameters defining a multi-coverage are briefly described below:
•Study. It contains the Name for identifying the study and the Service or technology selected for the study. Xirio, depending on the parameter selection, will propose some radio parameters, by default, suitable for calculation to be performed. This values can be modify at any time.
•Network coverages. These are the coverage studies involved in the Multi-coverage study calculation. For adding coverage studies to a Multi-coverage there are a number of icons:
The icon is only available for LTE services and shows the current table of neighbors and overlaps for each sector of multi-streamer coverage. This table can be created manually or through an automatic calculation of neighbors through the corresponding option in the action panel.
The icon has the functionality to create a new coverage, in the same way as configuring a simple coverage, from the toolbar, through "Create new study", with the difference that it will not be one more in the simple coverages list but it will appear only as part of that Multi-coverage and it must have the same service as the multiple to which it belongs.
The icon is used to add existing coverages. By clicking, a table like the one shown below will appear. The table will contain a list of all existing coverage studies with the same service that the multiple. It is possible to include the original coverage (by selecting the box on the left), which will be removed from the Study Manager studies list, or include a coverage copy (by selecting the box to the right), leaving the original coverage in the Study Manager studies list. If any of the coverages is included in other multi-coverage, the duplicate tick will be marked, and in that case, the original coverage can't be included so a copy of it will be included.
The icon has the functionality to extract simple coverages that belong to the multi-coverage study, and for that you must first select them by marking the corresponding box and next access the icon. Those that are extracted will become part of independent single coverages from Study Manager.
•Parameters of signal calculation, it includes the following parameters:
oServer Type: Select the methodology for determining the desired transmitter.
oConsider maximum best server distance: It allows to establish a distance from which a transmitter will not be considered in the choice of best server.
•Calculation area. Geographical area in which you want to perform calculations and on which the results will be obtained.
•Cartografía, que incluye los siguientes grupos de capas:
oCapas de cartografía de interior: Cuando el estudio de cobertura multitransmisor está formado por coberturas de interior, se tomarán los resultados asociados a la capa de interior seleccionada en este apartado para el resultado múltiple.
oCapas de cartografía: Esta es la cartografía que se utiliza en los cálculos de interferencias para evaluar el ángulo de incidencia de las señales interferentes, o para discernir si nos encontramos en interior o exterior en los cálculos de capacidad.
•Interference parameters. Allows you to set specific parameters for interference calculation.
oInterference calculation network coverage. It allows to calculate interference with the same calculation method used in the individual coverage studies (main method) or use an specific method for interference calculation known as secondary method. The interfering signal from each transmitter is always calculated with the main method. If the option to use a secondary method specific for interferences is chosen, Xirio will estimate the interference from the transmitter as the maximum value obtained with both methods.
oInterfering coverages from other networks. The interfering coverages from other networks are those that do not provide service because they do not belong to the network under study, but they can cause interference on it. It is calculated with the calculation method used in the individual coverage studies.
oSFN parameters. Only enlable for SFN networks in digital broadcast services. They are described in the following link.
oRejection Factor. The rejection factor specifies how an interfering signal affects in terms of radio service, frequency separation, etc.
•Ranges. Colour ranges that identify the signal level, overlap, C/I ratio and the signal level generated by interferenig coverages from other networks in results visualization.
All parameters, except for the individual coverage and the geographical calculation area, are configured automatically by Xirio when selecting the service to which the study belongs; These parameters are configured with the most appropriate values for the simulation type. However, these values can be modified when planning.
Anytime a Multi-coverage study is opened, the caption shown the following appearance:
Once all parameters have been completed, calculation can be started. To perform statistical or interference calculations you must have previously performed multi-coverage calculation at high resolution.
During calculation, it is shown a table that displays the status, progress and actions on each task. First, coverage studies are shown while are being calculated, and they will disappear as their calculation is complete. Finally, the multi-coverage study is calculated and when it finishes also disappears from the table. Once all calculations are completed the result can seen, opening the folder "result", just as is being done for the rest of the studies. The user can consult the results of each individual coverage studies as well.