To perform an automatic frequency assignment, you must have previously calculated the compatibility matrices in the "Network study calculation" dialog, as shown in the image.
When the "Automatic frequency assignment" action is selected, a table opens showing all the communications configured on the transport network:
In the example above, link 1 "Almuñecar - Sacratif" is configured with three bidirectional channels (frequencies), so six communications appear.
By default, the ends are configured with a single frequency, if you want to increase the number of frequencies you must do so from the end modification dialog.
The following actions can be performed for each of the communications:
•Modify. Allows you to manually change the polarization, channel and frequency. If the channel number is changed, double-clicking on the frequency window will automatically update it. Once the modifications have been made, you must validate the change. In case of any incompatibility these will be notified:
•Clear frequency. Deletes the assigned frequency and then recalculates it.
•Clear polarization. Deletes the assigned polarization and then recalculates it.
•Browse frequencies. Provides a list of free frequencies for the selected communication. In bidirectional links it is convenient to clean both paths to find free frequencies.
To end the frequency assignment, click the "Assign" button.
FREQUENCY ASSIGNMENT PARAMETERS
At the top you can display a block with the options for calculating the frequency assignment::
•Force symmetric channeling: If it is active, it is forced that the two directions of the same link have the same numbering in the upper and lower subbands.
•Permit concurrent subband: If it is not active, incoming (or outgoing) links are not allowed on the same node in different subbands.
•Concurrent end channel separation: When we have several channels in the same node this parameter indicates the minimum separation of channels that must be between them.
•Concurrent end maximum distance: If two ends are at a shorter distance they are considered to belong to the same node.
•Force minimum separation between carriers
•Minimum separation between carriers: Within the same link, is the minimum separation between the different channels of the ends.
•Assignment policy: Minimum interference or Maximum frequency reuse
•Communications priority in a link: Individual weight for each one, Same way same weight, Same weight for all
•Communications sorting: No order, Due to conflict
•Frequency proposal beginning: Low frequencies, High frequencies
•Highest number of iterations: From the Allocation Box algorithm.