Client: WSP
Solution Used: HTZ Communications
Scope: GSM-R, FRMCS, Private 5G Modelling and EMC Assessments
Comprehensive Radio Network Planning Across Multiple Technologies
As part of this project’s development, WSP supported route-wide network design and spectrum planning for legacy GSM-R, future FRMCS and potential Private 5G communications. HTZ Communications was used to model GSM-R900 and FRMCS1900 coverage along the route, generating detailed prediction maps that served as the technical basis for design validation and compliance assurance. This forward-facing modelling also included a proof-of-concept study into Private 5G deployment along the railway corridor, enabling WSP to assess the viability of dedicated high-capacity wireless services for operational and passenger connectivity.
Throughout the programme, civil engineering updates and changes in equipment siting posed a risk to network coverage. HTZ enabled the team to rapidly assess the impact of these changes, recalculating coverage scenarios to ensure continued compliance and alignment with performance. This agility ensured that network design could keep pace with an evolving infrastructure landscape without compromising service continuity.
Specialist EMC and Interference Modelling near MRAO
Radio planning near sensitive scientific installations required a more nuanced approach. At the Mullard Radio Astronomy Observatory (MRAO), HTZ was used to carry out detailed electromagnetic compatibility (EMC) assessments. The modelling included generating interference heat maps and path profiles to understand the potential impact of radio network deployment on existing radio astronomy operations. These outputs supported compliance and engagement with key stakeholders, including scientific bodies and local planning authorities.
Benefits of HTZ in Complex Rail Programmes
HTZ Communications proved its value in several key areas. Its high-resolution GIS engine and detailed Digital Terrain Models enabled precision radio planning, even in challenging terrain or restricted zones. The platform supported multi-scenario analysis, modelling normal operations, site failure modes, and future network migrations within a single environment.
For WSP and client, this flexibility delivered real cost benefits. By accurately modelling coverage, HTZ helped avoid unnecessary GSM-R infrastructure, reducing capital expenditure. The system also delivered robust outputs that strengthened stakeholder assurance at every stage from network dimensioning through to formal submissions for project scoping and Invitation to Tender processes.
Outcome
HTZ Communications enabled WSP to deliver advanced radio modelling across a technically diverse and strategically important railway development. By supporting multiple technologies, detailed EMC analysis and dynamic modelling throughout the project lifecycle, HTZ provided the assurance, efficiency and foresight essential for modern rail communication planning.
