ACMA device boundary analysis

August 28, 2019

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”.


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