Network Planning and Simulation for V2X Applications

The future of vehicle networking is hybrid

The integration of drones, high-altitude platforms (HAPs) and satellites into mobile networks creates a hybrid network in which the mobile infrastructure on the ground works seamlessly with network components in the air and in space. This 3D connectivity gives vehicles a seamless and ubiquitous connection via 5G and, in future, 6G and opens up completely new opportunities for network operators and vehicle manufacturers to develop vehicle-to-everything (V2X) connectivity services. V2X connects cars with each other, but also with pedestrians, the traffic infrastructure and the internet.

The convergence of terrestrial networks (TN) and non-terrestrial networks (NTN) eliminates the lack of mobile coverage in certain areas. At the same time, however, complexity is exploding. In hybrid TN/NTN networks for V2X communication, it is not only the vehicles that are in motion, but also the base stations on satellites, drones and HAPs. The result: more dynamics, more handovers, more interference. What network performance can be expected and whether planned or existing networks are reliable and powerful enough to guarantee the functioning of safety-relevant automotive applications can only be clarified with the help of realistic simulations. In order to simulate processes and structures in highly dynamic and complex 3D networks, we use our own TN/NTN system level simulator.

Comprehensive analysis of network performance

We reproduce realistic traffic scenarios, the network infrastructure and a wide range of network conditions in detailed simulations and use this as a basis for consulting on the planning, design, analysis and optimization of terrestrial and non-terrestrial networks for V2X applications.

Who will benefit from our 5G/6G satellite simulations?

  • Satellite service providers that want to explore a variety of TN/NTN or NTN use cases and need reliable data on throughput, latency, and handover performance as a solid basis for decisions.
  • Mobile network operators aiming to test TN/NTN interaction and identify the best path to seamless coverage – without field trial and error.
  • Automotive OEMs and suppliers seeking an early assessment of the feasibility and performance of diverse V2X applications in combined TN/NTN scenarios.
  • Regulatory bodies that want to analyze multiple radio access technologies coexistence and interference in order to draft clear, future-oriented rules and guidelines.
  • AI developers who require AI training data with large-scale, realistic mobility and radio datasets from complex TN/NTN scenarios to train precise, trustworthy AI models for deployment on the road.

Network and traffic simulation in one

We use our TN/NTN system level simulator to model V2X scenarios in great detail. The configuration options developed are so flexible that we can create a virtual image – the digital twin – of a planned or existing network. Frequency bands and bandwidths are just as configurable as the locations of the terrestrial base stations or the trajectories of the non-terrestrial network components.

This network simulation is paired with a traffic simulation. We use it to simulate different traffic volumes, remote driving cars and different vehicle types. By combining network and traffic simulation, the data transmission between vehicles and network infrastructure can be tested in a finely tuned manner. We have also created configuration options with which we can tailor the simulated data transmission to the specific application. For example, the size of the data packets in the uplink and downlink as well as the quality of service (QoS) requirements of the application can be flexibly adapted.

Flexible modeling of various V2X scenarios

System-level simulations provide information about the performance of communication networks in various V2X scenarios. The requirements for the simulation options vary depending on the scenario under consideration.

Urban driving
scenario

In an urban environment, the focus is on complex traffic conditions such as roundabouts, complex crossings, traffic lights and pedestrian traffic, which can be modeled in simulation.

The challenge here is to include a large number of vehicles per cell and different vehicle types – from buses and taxis to trucks.

Shadowing from tall buildings must also be taken into account. Our simulation environment therefore makes it possible to try out different base station placements and to investigate interference and handovers between terrestrial and non-terrestrial networks.

Driving scenario in
rural areas

When looking at driving on country roads, the simulation of inter-vehicle distances during acceleration and braking is crucial.

Even more than in urban environments, a reliable configuration of the NTN infrastructure, including satellites, drones and HAPs, is crucial in rural areas without sufficient terrestrial mobile network coverage.

With our simulation environment, we can flexibly parameterize these elements and evaluate the impact on latency, throughput and network availability for direct data transmissions between vehicles and network components.

High-speed
scenario

When driving on highways, high speeds and sudden braking are a challenge. Here, conventional and remote-controlled vehicles must interact safely and efficiently at varying speeds.

In our simulations, such situations can be modeled and inter-vehicle distances can be controlled. We can also realistically simulate the effects of different speeds on data transmission.

The consideration of handover processes between different satellites in LEO constellations is particularly relevant when driving outside terrestrial mobile network coverage.

Clear results: evaluation and visualization options

Heat maps • 2D/3D visualization • Throughput • Handover assessment

Heat maps

Heat maps visualize the network performance in terms of signal strength and latency in a specific region. This allows for identifying weak points in mobile network coverage or delays in data transmission.

2D/3D visualization

The visualization of the simulated scenarios in 2D and 3D video animations illustrates the complex processes in TN/NTN networks and depicts the interaction between terrestrial and non-terrestrial infrastructure.

Throughput

The analysis and visualization of the achievable data rates in uplink and downlink provide information on which application requirements can be met in a specific scenario.

Handover assessment

Analyzing the signal quality (SINR, signal-to-interference-plus-noise ratio) over time and taking into account the respective handovers to other base stations or satellites helps to assess the efficiency of simulated handover procedures.

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