FRMCS_3D coverage


HTZ Communications is a comprehensive solution for managing the entire network lifecycle, from initial design to planning and optimization. Our cutting-edge platform empowers engineers to create seamless coverage, whether it's from outdoor to indoor spaces or indoor to indoor areas. Here are some of the key features that set us apart.

  • Radio Network Planning: Our platform offers robust tools for radio network planning, including frequency planning and network optimization. We help you ensure that your network operates efficiently and delivers exceptional performance.
  • Interference Studies: We conduct in-depth interference studies, including traffic analysis and intermodulation assessments, to identify and mitigate potential issues that could affect network quality.
  • Cross-Border Coordination: For projects that extend across borders, HTZ provides valuable support in coordinating activities and ensuring smooth communication across different regions.
  • Equipment Vendor Integration: We seamlessly integrate with equipment vendors, facilitating site surveys and measurement campaigns, streamlining your workflow, and ensuring compatibility with the latest technologies.
  • Radio Sub-System Design: Our expertise extends to the design and construction of radio sub-systems, including ERTMS/GSM-R, and fibre-optic cable networks. We help you build reliable, future-proof infrastructure.
  • Environmental Analysis: Safety and compliance are paramount. We offer tools for environmental analysis and human hazard calculations, including considerations related to Natura 2000 areas.
  • Fiber-Optic Network Design: We specialize in the design and construction of fibre-optic cable networks and transmission systems, enabling high-speed data transfer and connectivity.
  • Site Survey Data Management: Efficiently manage data from site surveys, ensuring that valuable information is organized and readily accessible.
  • Measurement Campaign Data Management: Our platform allows you to effectively manage data collected during measurement campaigns, facilitating data-driven decisions and optimisation.


HTZ Communications stands out with its unique capabilities in modelling and simulating radiofrequency systems within rail environments, including GSM-R and LTE-R. As GSM-R approaches obsolescence, we support both legacy and emerging technologies, enabling network operators to coexist and successfully transition into the future.

HTZ contains an extensive library of propagation models for different environments, allowing the tool to characterise the impact of frequency, distance, and other conditions on radio wave propagation. Data from external sources like documents and pre-prepared datasets can be imported during the initial stages of the project. Depending on the choice of propagation model, the range of the chosen frequency can be assessed both along the railway line, as well as for indoor propagation into buildings in the area.

Attenuation is a reduction of signal strength during transmission, which affects radio signal performance. Signal attenuation can be modelled considering building materials and their impacts on radio signals. This is important when considering radio coverage for platforms, stations, pedestrian subways, railway bridges and tunnels. HTZ can optimize leaky-feed systems within tunnels for improved coverage.



Check out our latest case studies from across the industry.

Case #1

Analysing the impact of footbridge on GSM-R coverage

This study looked at the impact of a proposed footbridge on a GSM-R network to ID potential risks and mitigation solutions. A baseline simulation established a comparable model and the team analysed the impact on the coverage when the new structure was added. This study was for a network operator in Australia.

Case #2

Antenna modelling for GSM-R networks

This study looked at how to improve network coverage by optimising antenna installations, to ensure hand portables and base stations always communicated. The team determined the nominal antenna parameters for the radio system operating in both the VHF band at 150MHz and GSM-R. 

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Use case #3

Backbone Transmission network planning

This study looks at the design of a country-wide backbone transmission network planned for a central European country. The plan focussed on mitigating the impact on the local environment and emission controls.  This project was part of a larger project run with PKP, the Polish Rail Infrastructure company.

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Case #4

VHF radio upgrade

This study combined two existing VHF networks to minimise equipment and construction costs. The team designed each section incorporating interference analysis, channel planning, handover analysis and best server analysis. Indoor coverage was managed by a leaky feeder system with a unique plan for each tunnel.

Visualising Sydney's FRMCS sample site coverage: A 3D Heatmap view in HTZ Communications
Enhancing Connectivity in Sydney: FRMCS sample sites coverage heatmap with directive antennas, classified into four signal strength categories
3D Ray-Tracing reveals FRMCS signal impact amidst existing and prospective urban structures around the rail corridors, produced in HTZ Communications