MLinkPlanner 1.2

Point-to-Point and Point-to-Multipoint Microwave Link Planning Software

Microwave link planning software user interface

User Manual

Part 1   Part 2   Part 3   Part 4

Availability and link performance reports can be calculated for any subscriber station. A base station performance summary report can also be generated. Calculations for point-to-multipoint link availability and link performance are performed in accordance with the model recommended in the ITU-R P.530-17.


To generate a performance report:
1.    Make sure that all subscriber stations have a path profile.  In the Point-to-Multipoint tab, create the Path Profile between Base Stations and Subscriber Stations (just like for a point-to-point link). Using the "Generate Profiles" button, you can simultaneously generate the path profiles for all subscribers for the currently selected base station.
2.    Specify the parameters of the Base Stations and Subscriber Stations equipment;
3.    Select a subscriber station by clicking on it on the Subscriber Station table. You can also select a subscriber station by double-clicking on it on its link the basemap.
4.    Click on the Report button and select the required report type - Short Report, Full Report or Base Station Performance Summary


Short Report and Full Report are similar to the reports for point-to-point hops. 

Figure 31. PtMP hop short report

Base Station Performance Summary provides a summary of the performance of all the subscriber stations of the selected base station including the maximum usable modulation modes of all the PtMP Links that meet the required minimum flat fade margin setting and minimum annual availability setting. The minimum flat fade margin and annual availability setting can be entered in the Project Settings menu.

Figure 32. Base Station Performance Summary

You can also save summary information for all Point-to-Multipoint links in an Excel spreadsheet. Click the "Summary Report" button on the PtMP tab and Excel spreadsheet will open. Only active base stations will be listed in the spreadsheet; profiles for the subscriber stations must be pre-generated before running the Excel “Summary Report”.

Figure 33. Summary Report for Point-to-Multipoint links

In the point-to-multipoint link availability calculation, all clutter (buildings and trees) along the link profile are taken into account.


When working with path profile in point-to-multipoint links, the same path profile analysis features found in the point-to-point path profile panel are available:


-    Antenna height calculation;
-    Reflection analysis;
-    Diffraction analysis.

Settings
Application Settings

Figure 34. Application settings

Path to the folder with cache files             The path to the folder where downloaded basemap tiles will be saved for quick                                                                                                     access. This will speed up the application. The downloaded maps will remain on your                                                                                         computer, and you will be able to view them when you don’t have an Internet                                                                                                        connection. This folder is created automatically when the application is launched for                                                                                          the first time. You can change this folder

Path to the folder with data files              The path to the folder where the downloaded Global terrain elevation and Global tree                                                                                          cover files will be saved for quick access. This will speed up the application. Moreover,                                                                                        the downloaded files will remain on your computer, and the application will be able to                                                                                          use them and create a terrain profile when you don’t have an Internet connection. This                                                                                        folder is created automatically when the application is launched for the first time. You                                                                                         can change this folder

Coordinates format                                     The geographical coordinates: Degrees Minutes Seconds (for example N44 34’ 23.7’’ W134                                                                              29’ 23,4’’) or Decimal Degrees (for example N44.345678 W134.567893)
Proxy settings                                               If you are using a proxy server to access the Internet, enter its IP-address and port                                                                                              number. If the proxy server requires authentication, enter the username and password

In this box, you set a number of parameters for defining the path profile and setting the calculation algorithm according to ITU-R P.530-17.

Figure 35. Project settings

Project settings
Step of terrain and obstacle points along the

profile, m                                                                       Step of terrain and obstacle points along the profile for automatic creation of the                                                                                                 path profile. For SRTM-1, the minimum step for the creation of the path profile is 30m                                                                                          A lower value makes no sense since it will not increase the accuracy
Part of first Fresnel zone which will be shown, %   A part of the first Fresnel zone which will be shown when the path profile is                                                                                                         displayed
Median value of k-factor                                             Median value of the k-factor that will be used to create the path profile of the hopand                                                                                         determine clearance ITU-R P.530-17 settings

Minimum value of the Flat Fade Margin               The minimum allowable fade margin, if the fade margin is less than this value, the                                                                                               calculation will be stopped


Maximum value of the frequency diversity

improvement factor for non-selective outage

probability                                                                     Limiting the maximum value of the frequency diversity improvement factor for non                                                                                              selective outage probability
Maximum value of the frequency diversity

improvement factor for selective outage

probability                                                                      Limiting the maximum value of the frequency diversity improvement factor for                                                                                                    selective outage probability
Maximum value of the space diversity

improvement factor for selective outage

probability                                                                      Limiting the maximum value of the space diversity improvement factor for selective                                                                                            outage probability
Maximum value of the space and frequency

diversity (four receivers) improvement factor

for non-selective outage probability                           Limiting the maximum value of the space and frequency diversity (four receivers)                                                                                                improvement factor for non-selective outage probability
Maximum value of the space and frequency

diversity (four receivers) improvement factor

for selective outage probability                                  Limiting the maximum value of the space and frequency diversity (four receivers)                                                                                               improvement factor for selective outage probability

Minimum Annual availability required                       Minimum Annual availability for PtMP Base Station Performance Summary

Basemap Settings

You can configure your own custom basemap by specifying a tile server URL.
The prototype URL encapsulates a request format that is specific to the map provider, and it varies from map provider to map provider. It consists of a text string that begins with http://, has a domain name and possible parameters, plus some symbols that MLinkPlanner substitutes with real-time tile request information when actually contacting the server.

Figure 36 Basemaps settings

Below is a detailed explanation of how prototype URLs are constructed. The possible symbols that MLinkPlanner accepts in the prototype URL are: [X], [Y] and [Z] coordinates and zoom
To lookup map imagery in their database, most map providers use tile coordinates of x and y, plus zoom. As an example, the OpenStreetMap provides map imagery using x, y, and zoom. We can test-fetch a map tile of a portion of North America by typing the following URL into a web browser:
http://a.tile.openstreetmap.org/3/1/2.png 
The numbers at the end of the URL represent zoom, x, and y respectively. The OpenStreetMap fetches the map tile corresponding to x = 1, y = 2, and zoom = 3.
In order for MLinkPlanner to properly fetch tiles from a map provider, a generalized prototype URL scheme must be furnished. This generalized URL scheme will be used by MLinkPlanner to fetch any tile, at any coordinate, with any zoom. To accomplish this, the symbols "[X]", "[Y]", and "[Z]" (without the quotes) are inserted in place of explicit coordinates.
For example, creating custom map types in MLinkPlanner for OpenStreetMap can be accomplished by mixing the known explicit URLs above, with the symbols representing x, y, and zoom to form a custom map prototype URL (try these in the custom maps setup screen in MLinkPlanner):
http://a.tile.openstreetmap.org/[Z]/[X]/[Y].png
When MLinkPlanner needs a map tile fetched from a provider, it will replace the "[X]", "[Y]", and "[Z]" symbols with the actual coordinates and zoom for the tile required, and then use the resulting URL to contact the map provider's server to fetch the map tile.
To use Custom Maps enter the Map Servers URL of the required map. There are some examples listed below. Search online for local map providers map servers URLs.
Example:
OCM Transport:
http://a.tile2.opencyclemap.org/transport/[Z]/[X]/[Y].png