Public-Network Railway Communications for Regional Transit

Kontron Transportation and AKN Eisenbahn have partnered to implement an MCx-based railway communication system across regional transit routes in Northern Germany. Through this deployment, the transit operator utilizes public LTE and 5G networks to modernize its operational train radio systems without building dedicated physical radio infrastructure.

Regional Transit Operations and Legacy Challenges
AKN Eisenbahn operates a regional rail network spanning over 100 kilometers across the Hamburg and Schleswig-Holstein regions, transporting millions of passengers annually. The transit operator faced the technical challenge of replacing legacy communication systems while maintaining continuous operational safety and system reliability. To execute this transition cost-effectively, AKN required a communication architecture capable of supporting modern digital railway operations while aligning with Future Railway Mobile Communication System (FRMCS) standards.

Implementing Over-the-Top Digital Infrastructure
To address these operational requirements, AKN Eisenbahn selected a mission-critical (MCx) communication solution provided by Kontron Transportation. Instead of constructing a proprietary physical radio network, the chosen system functions via an over-the-top (OTT) architecture. This approach routes mission-critical data and voice traffic through existing public LTE and 5G mobile networks.

AKN selected this technology because it enables the rapid deployment of modern train radio functionalities while avoiding the extensive capital expenditure and extended project timelines associated with building new radio masts along the tracks. Furthermore, the platform complies with international mission-critical standards, ensuring the process stability and signal continuity required for passenger rail operations.

Operational Impact and Network Scalability
The integration of this digital infrastructure yields immediate operational benefits for the regional rail network, including secure real-time train-to-ground communications and reliable emergency call routing. By utilizing high-bandwidth public networks, the system ensures the low-latency data transmission necessary for active rail traffic management.

Additionally, the over-the-top framework provides a scalable foundation that supports AKN's gradual transition toward future FRMCS protocols and advanced digital applications. Kontron Transportation previously validated this standard-based deployment model by equipping over 1,500 kilometers of regional railway infrastructure across Germany, demonstrating the viability of utilizing public mobile networks for mission-critical transit operations.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

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