HOW TO… ACMA device boundary analysis

4G/5G device boundary analysis using HTZ Communications

It is easier and more precise than ever to deliver Device Boundary prediction for the purpose of 4G/5G device coordination and registration.

HTZ communications has existing capabilities to predict device boundary complying with criteria such as:

  • 30 or 90 m terrain step based on Geo-science Australia (1 arc sec SRTM)
  • With/without clutter effect
  • 1 degree radial coverage predictions
  • 250m or 500m tolerance for classifying continuous or non-continuous coverage when deciding on the end of the device boundary
  • Propagation model based on ITU-R P.526-14
  • -98 dBm/ 1 MHz device boundary threshold
  • Device EIRP/1 MHz and antenna radiation pattern modelling
  • RX antenna height (5m)
  • Importing licence area boundary

The analysis starts from the setting up technical parameters to meet regulatory criteria.

Step 1) Insert licence area boundaries (KML/SHAPEFILE) – shown in blue below:

Step 2) Model one or multiple sites at once and configure technical parameters (sites can be imported from CSV file or from SQL)

Step 3) Model beam forming massive-MIMO AAS antenna

Step 4) Setup appropriate propagation model (ITU-R P.526-14 for instance)

Step 5) Select sector to establish device boundary

Step 6) Select “Coordination” >> “Threshold limited polygon calculation….”

Step 7) Set up the boundary calculations as follows:

  • Rx antenna height = 5 m
  • Max distance = 108 000 m
  • Tolerance = 250 m
  • 1 deg resolution
  • RX antenna (m): The height at once the signal level will be predicted
  • Angle step: The radial rotation increments for the calculations. Minimum can go down to 1 degree of “Add to vector” is enforced
  • Max distance (m): The maximum distance from the station at which coverage is calculated
  • Tolerance distance (m): The minimum coverage dis-continuity for which the device boundary (polygon point) is considered terminated
  • From Tx coverage: if set to 1 then the tool will use the coverage found on the map (from memory) else if “0” then the tool would predict in P2P mode

Add to vector layer: if set to “1” then the tool will calculate the device boundary in 1 degree resolution and will be added to the current vector layer attached.

 

Calculation outcome for single sector:

Device boundary based on -98 dBm/MHz:

Calculation outcome for multiple sectors (different colour representing different sector). The blue lines to the North representing the licence boundary:

Analysis below presenting both the device boundary and the coverage prediction.

Light blue: Signal exceeding or equal to -98dBm/1MHz

Yellow: Signal exceeding -150 dBm but inferior to -98 dBm/1 MHz

The plots above clearly show the difference between coverage (light blue plot) and the device boundary for one of the sectors (blue polygon) and the importance of the “tolerance”.

HOW TO…

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